1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2000-2009 Josh Coalson
3 * Copyright (C) 2011-2016 Xiph.Org Foundation
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * - Neither the name of the Xiph.org Foundation nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 #include <stdlib.h> /* for malloc() */
39 #include <string.h> /* for memset/memcpy() */
40 #include <sys/stat.h> /* for stat() */
41 #include <sys/types.h> /* for off_t */
42 #include "share/compat.h"
43 #include "FLAC/assert.h"
44 #include "share/alloc.h"
45 #include "protected/stream_decoder.h"
46 #include "private/bitreader.h"
47 #include "private/bitmath.h"
48 #include "private/cpu.h"
49 #include "private/crc.h"
50 #include "private/fixed.h"
51 #include "private/format.h"
52 #include "private/lpc.h"
53 #include "private/md5.h"
54 #include "private/memory.h"
55 #include "private/macros.h"
58 /* technically this should be in an "export.c" but this is convenient enough */
59 FLAC_API
int FLAC_API_SUPPORTS_OGG_FLAC
= FLAC__HAS_OGG
;
62 /***********************************************************************
66 ***********************************************************************/
68 static const FLAC__byte ID3V2_TAG_
[3] = { 'I', 'D', '3' };
70 /***********************************************************************
72 * Private class method prototypes
74 ***********************************************************************/
76 static void set_defaults_(FLAC__StreamDecoder
*decoder
);
77 static FILE *get_binary_stdin_(void);
78 static FLAC__bool
allocate_output_(FLAC__StreamDecoder
*decoder
, uint32_t size
, uint32_t channels
);
79 static FLAC__bool
has_id_filtered_(FLAC__StreamDecoder
*decoder
, FLAC__byte
*id
);
80 static FLAC__bool
find_metadata_(FLAC__StreamDecoder
*decoder
);
81 static FLAC__bool
read_metadata_(FLAC__StreamDecoder
*decoder
);
82 static FLAC__bool
read_metadata_streaminfo_(FLAC__StreamDecoder
*decoder
, FLAC__bool is_last
, uint32_t length
);
83 static FLAC__bool
read_metadata_seektable_(FLAC__StreamDecoder
*decoder
, FLAC__bool is_last
, uint32_t length
);
84 static FLAC__bool
read_metadata_vorbiscomment_(FLAC__StreamDecoder
*decoder
, FLAC__StreamMetadata_VorbisComment
*obj
, uint32_t length
);
85 static FLAC__bool
read_metadata_cuesheet_(FLAC__StreamDecoder
*decoder
, FLAC__StreamMetadata_CueSheet
*obj
);
86 static FLAC__bool
read_metadata_picture_(FLAC__StreamDecoder
*decoder
, FLAC__StreamMetadata_Picture
*obj
);
87 static FLAC__bool
skip_id3v2_tag_(FLAC__StreamDecoder
*decoder
);
88 static FLAC__bool
frame_sync_(FLAC__StreamDecoder
*decoder
);
89 static FLAC__bool
read_frame_(FLAC__StreamDecoder
*decoder
, FLAC__bool
*got_a_frame
, FLAC__bool do_full_decode
);
90 static FLAC__bool
read_frame_header_(FLAC__StreamDecoder
*decoder
);
91 static FLAC__bool
read_subframe_(FLAC__StreamDecoder
*decoder
, uint32_t channel
, uint32_t bps
, FLAC__bool do_full_decode
);
92 static FLAC__bool
read_subframe_constant_(FLAC__StreamDecoder
*decoder
, uint32_t channel
, uint32_t bps
, FLAC__bool do_full_decode
);
93 static FLAC__bool
read_subframe_fixed_(FLAC__StreamDecoder
*decoder
, uint32_t channel
, uint32_t bps
, const uint32_t order
, FLAC__bool do_full_decode
);
94 static FLAC__bool
read_subframe_lpc_(FLAC__StreamDecoder
*decoder
, uint32_t channel
, uint32_t bps
, const uint32_t order
, FLAC__bool do_full_decode
);
95 static FLAC__bool
read_subframe_verbatim_(FLAC__StreamDecoder
*decoder
, uint32_t channel
, uint32_t bps
, FLAC__bool do_full_decode
);
96 static FLAC__bool
read_residual_partitioned_rice_(FLAC__StreamDecoder
*decoder
, uint32_t predictor_order
, uint32_t partition_order
, FLAC__EntropyCodingMethod_PartitionedRiceContents
*partitioned_rice_contents
, FLAC__int32
*residual
, FLAC__bool is_extended
);
97 static FLAC__bool
read_zero_padding_(FLAC__StreamDecoder
*decoder
);
98 static FLAC__bool
read_callback_(FLAC__byte buffer
[], size_t *bytes
, void *client_data
);
100 static FLAC__StreamDecoderReadStatus
read_callback_ogg_aspect_(const FLAC__StreamDecoder
*decoder
, FLAC__byte buffer
[], size_t *bytes
);
101 static FLAC__OggDecoderAspectReadStatus
read_callback_proxy_(const void *void_decoder
, FLAC__byte buffer
[], size_t *bytes
, void *client_data
);
103 static FLAC__StreamDecoderWriteStatus
write_audio_frame_to_client_(FLAC__StreamDecoder
*decoder
, const FLAC__Frame
*frame
, const FLAC__int32
* const buffer
[]);
104 static void send_error_to_client_(const FLAC__StreamDecoder
*decoder
, FLAC__StreamDecoderErrorStatus status
);
105 static FLAC__bool
seek_to_absolute_sample_(FLAC__StreamDecoder
*decoder
, FLAC__uint64 stream_length
, FLAC__uint64 target_sample
);
107 static FLAC__bool
seek_to_absolute_sample_ogg_(FLAC__StreamDecoder
*decoder
, FLAC__uint64 stream_length
, FLAC__uint64 target_sample
);
109 static FLAC__StreamDecoderReadStatus
file_read_callback_(const FLAC__StreamDecoder
*decoder
, FLAC__byte buffer
[], size_t *bytes
, void *client_data
);
110 static FLAC__StreamDecoderSeekStatus
file_seek_callback_(const FLAC__StreamDecoder
*decoder
, FLAC__uint64 absolute_byte_offset
, void *client_data
);
111 static FLAC__StreamDecoderTellStatus
file_tell_callback_(const FLAC__StreamDecoder
*decoder
, FLAC__uint64
*absolute_byte_offset
, void *client_data
);
112 static FLAC__StreamDecoderLengthStatus
file_length_callback_(const FLAC__StreamDecoder
*decoder
, FLAC__uint64
*stream_length
, void *client_data
);
113 static FLAC__bool
file_eof_callback_(const FLAC__StreamDecoder
*decoder
, void *client_data
);
115 /***********************************************************************
119 ***********************************************************************/
121 typedef struct FLAC__StreamDecoderPrivate
{
123 FLAC__StreamDecoderReadCallback read_callback
;
124 FLAC__StreamDecoderSeekCallback seek_callback
;
125 FLAC__StreamDecoderTellCallback tell_callback
;
126 FLAC__StreamDecoderLengthCallback length_callback
;
127 FLAC__StreamDecoderEofCallback eof_callback
;
128 FLAC__StreamDecoderWriteCallback write_callback
;
129 FLAC__StreamDecoderMetadataCallback metadata_callback
;
130 FLAC__StreamDecoderErrorCallback error_callback
;
131 /* generic 32-bit datapath: */
132 void (*local_lpc_restore_signal
)(const FLAC__int32 residual
[], uint32_t data_len
, const FLAC__int32 qlp_coeff
[], uint32_t order
, int lp_quantization
, FLAC__int32 data
[]);
133 /* generic 64-bit datapath: */
134 void (*local_lpc_restore_signal_64bit
)(const FLAC__int32 residual
[], uint32_t data_len
, const FLAC__int32 qlp_coeff
[], uint32_t order
, int lp_quantization
, FLAC__int32 data
[]);
135 /* for use when the signal is <= 16 bits-per-sample, or <= 15 bits-per-sample on a side channel (which requires 1 extra bit): */
136 void (*local_lpc_restore_signal_16bit
)(const FLAC__int32 residual
[], uint32_t data_len
, const FLAC__int32 qlp_coeff
[], uint32_t order
, int lp_quantization
, FLAC__int32 data
[]);
138 FILE *file
; /* only used if FLAC__stream_decoder_init_file()/FLAC__stream_decoder_init_file() called, else NULL */
139 FLAC__BitReader
*input
;
140 FLAC__int32
*output
[FLAC__MAX_CHANNELS
];
141 FLAC__int32
*residual
[FLAC__MAX_CHANNELS
]; /* WATCHOUT: these are the aligned pointers; the real pointers that should be free()'d are residual_unaligned[] below */
142 FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents
[FLAC__MAX_CHANNELS
];
143 uint32_t output_capacity
, output_channels
;
144 FLAC__uint32 fixed_block_size
, next_fixed_block_size
;
145 FLAC__uint64 samples_decoded
;
146 FLAC__bool has_stream_info
, has_seek_table
;
147 FLAC__StreamMetadata stream_info
;
148 FLAC__StreamMetadata seek_table
;
149 FLAC__bool metadata_filter
[128]; /* MAGIC number 128 == total number of metadata block types == 1 << 7 */
150 FLAC__byte
*metadata_filter_ids
;
151 size_t metadata_filter_ids_count
, metadata_filter_ids_capacity
; /* units for both are IDs, not bytes */
153 FLAC__bool cached
; /* true if there is a byte in lookahead */
154 FLAC__CPUInfo cpuinfo
;
155 FLAC__byte header_warmup
[2]; /* contains the sync code and reserved bits */
156 FLAC__byte lookahead
; /* temp storage when we need to look ahead one byte in the stream */
157 /* unaligned (original) pointers to allocated data */
158 FLAC__int32
*residual_unaligned
[FLAC__MAX_CHANNELS
];
159 FLAC__bool do_md5_checking
; /* initially gets protected_->md5_checking but is turned off after a seek or if the metadata has a zero MD5 */
160 FLAC__bool internal_reset_hack
; /* used only during init() so we can call reset to set up the decoder without rewinding the input */
161 FLAC__bool is_seeking
;
162 FLAC__MD5Context md5context
;
163 FLAC__byte computed_md5sum
[16]; /* this is the sum we computed from the decoded data */
164 /* (the rest of these are only used for seeking) */
165 FLAC__Frame last_frame
; /* holds the info of the last frame we seeked to */
166 FLAC__uint64 first_frame_offset
; /* hint to the seek routine of where in the stream the first audio frame starts */
167 FLAC__uint64 target_sample
;
168 uint32_t unparseable_frame_count
; /* used to tell whether we're decoding a future version of FLAC or just got a bad sync */
169 FLAC__bool got_a_frame
; /* hack needed in Ogg FLAC seek routine to check when process_single() actually writes a frame */
170 } FLAC__StreamDecoderPrivate
;
172 /***********************************************************************
174 * Public static class data
176 ***********************************************************************/
178 FLAC_API
const char * const FLAC__StreamDecoderStateString
[] = {
179 "FLAC__STREAM_DECODER_SEARCH_FOR_METADATA",
180 "FLAC__STREAM_DECODER_READ_METADATA",
181 "FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC",
182 "FLAC__STREAM_DECODER_READ_FRAME",
183 "FLAC__STREAM_DECODER_END_OF_STREAM",
184 "FLAC__STREAM_DECODER_OGG_ERROR",
185 "FLAC__STREAM_DECODER_SEEK_ERROR",
186 "FLAC__STREAM_DECODER_ABORTED",
187 "FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR",
188 "FLAC__STREAM_DECODER_UNINITIALIZED"
191 FLAC_API
const char * const FLAC__StreamDecoderInitStatusString
[] = {
192 "FLAC__STREAM_DECODER_INIT_STATUS_OK",
193 "FLAC__STREAM_DECODER_INIT_STATUS_UNSUPPORTED_CONTAINER",
194 "FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS",
195 "FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR",
196 "FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE",
197 "FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED"
200 FLAC_API
const char * const FLAC__StreamDecoderReadStatusString
[] = {
201 "FLAC__STREAM_DECODER_READ_STATUS_CONTINUE",
202 "FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM",
203 "FLAC__STREAM_DECODER_READ_STATUS_ABORT"
206 FLAC_API
const char * const FLAC__StreamDecoderSeekStatusString
[] = {
207 "FLAC__STREAM_DECODER_SEEK_STATUS_OK",
208 "FLAC__STREAM_DECODER_SEEK_STATUS_ERROR",
209 "FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED"
212 FLAC_API
const char * const FLAC__StreamDecoderTellStatusString
[] = {
213 "FLAC__STREAM_DECODER_TELL_STATUS_OK",
214 "FLAC__STREAM_DECODER_TELL_STATUS_ERROR",
215 "FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED"
218 FLAC_API
const char * const FLAC__StreamDecoderLengthStatusString
[] = {
219 "FLAC__STREAM_DECODER_LENGTH_STATUS_OK",
220 "FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR",
221 "FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED"
224 FLAC_API
const char * const FLAC__StreamDecoderWriteStatusString
[] = {
225 "FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE",
226 "FLAC__STREAM_DECODER_WRITE_STATUS_ABORT"
229 FLAC_API
const char * const FLAC__StreamDecoderErrorStatusString
[] = {
230 "FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC",
231 "FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER",
232 "FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH",
233 "FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM"
236 /***********************************************************************
238 * Class constructor/destructor
240 ***********************************************************************/
241 FLAC_API FLAC__StreamDecoder
*FLAC__stream_decoder_new(void)
243 FLAC__StreamDecoder
*decoder
;
246 FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
248 decoder
= calloc(1, sizeof(FLAC__StreamDecoder
));
253 decoder
->protected_
= calloc(1, sizeof(FLAC__StreamDecoderProtected
));
254 if(decoder
->protected_
== 0) {
259 decoder
->private_
= calloc(1, sizeof(FLAC__StreamDecoderPrivate
));
260 if(decoder
->private_
== 0) {
261 free(decoder
->protected_
);
266 decoder
->private_
->input
= FLAC__bitreader_new();
267 if(decoder
->private_
->input
== 0) {
268 free(decoder
->private_
);
269 free(decoder
->protected_
);
274 decoder
->private_
->metadata_filter_ids_capacity
= 16;
275 if(0 == (decoder
->private_
->metadata_filter_ids
= malloc((FLAC__STREAM_METADATA_APPLICATION_ID_LEN
/8) * decoder
->private_
->metadata_filter_ids_capacity
))) {
276 FLAC__bitreader_delete(decoder
->private_
->input
);
277 free(decoder
->private_
);
278 free(decoder
->protected_
);
283 for(i
= 0; i
< FLAC__MAX_CHANNELS
; i
++) {
284 decoder
->private_
->output
[i
] = 0;
285 decoder
->private_
->residual_unaligned
[i
] = decoder
->private_
->residual
[i
] = 0;
288 decoder
->private_
->output_capacity
= 0;
289 decoder
->private_
->output_channels
= 0;
290 decoder
->private_
->has_seek_table
= false;
292 for(i
= 0; i
< FLAC__MAX_CHANNELS
; i
++)
293 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&decoder
->private_
->partitioned_rice_contents
[i
]);
295 decoder
->private_
->file
= 0;
297 set_defaults_(decoder
);
299 decoder
->protected_
->state
= FLAC__STREAM_DECODER_UNINITIALIZED
;
304 FLAC_API
void FLAC__stream_decoder_delete(FLAC__StreamDecoder
*decoder
)
311 FLAC__ASSERT(0 != decoder
->protected_
);
312 FLAC__ASSERT(0 != decoder
->private_
);
313 FLAC__ASSERT(0 != decoder
->private_
->input
);
315 (void)FLAC__stream_decoder_finish(decoder
);
317 if(0 != decoder
->private_
->metadata_filter_ids
)
318 free(decoder
->private_
->metadata_filter_ids
);
320 FLAC__bitreader_delete(decoder
->private_
->input
);
322 for(i
= 0; i
< FLAC__MAX_CHANNELS
; i
++)
323 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&decoder
->private_
->partitioned_rice_contents
[i
]);
325 free(decoder
->private_
);
326 free(decoder
->protected_
);
330 /***********************************************************************
332 * Public class methods
334 ***********************************************************************/
336 static FLAC__StreamDecoderInitStatus
init_stream_internal_(
337 FLAC__StreamDecoder
*decoder
,
338 FLAC__StreamDecoderReadCallback read_callback
,
339 FLAC__StreamDecoderSeekCallback seek_callback
,
340 FLAC__StreamDecoderTellCallback tell_callback
,
341 FLAC__StreamDecoderLengthCallback length_callback
,
342 FLAC__StreamDecoderEofCallback eof_callback
,
343 FLAC__StreamDecoderWriteCallback write_callback
,
344 FLAC__StreamDecoderMetadataCallback metadata_callback
,
345 FLAC__StreamDecoderErrorCallback error_callback
,
350 FLAC__ASSERT(0 != decoder
);
352 if(decoder
->protected_
->state
!= FLAC__STREAM_DECODER_UNINITIALIZED
)
353 return FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED
;
355 if(FLAC__HAS_OGG
== 0 && is_ogg
)
356 return FLAC__STREAM_DECODER_INIT_STATUS_UNSUPPORTED_CONTAINER
;
359 0 == read_callback
||
360 0 == write_callback
||
361 0 == error_callback
||
362 (seek_callback
&& (0 == tell_callback
|| 0 == length_callback
|| 0 == eof_callback
))
364 return FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS
;
367 decoder
->private_
->is_ogg
= is_ogg
;
368 if(is_ogg
&& !FLAC__ogg_decoder_aspect_init(&decoder
->protected_
->ogg_decoder_aspect
))
369 return decoder
->protected_
->initstate
= FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE
;
373 * get the CPU info and set the function pointers
375 FLAC__cpu_info(&decoder
->private_
->cpuinfo
);
376 /* first default to the non-asm routines */
377 decoder
->private_
->local_lpc_restore_signal
= FLAC__lpc_restore_signal
;
378 decoder
->private_
->local_lpc_restore_signal_64bit
= FLAC__lpc_restore_signal_wide
;
379 decoder
->private_
->local_lpc_restore_signal_16bit
= FLAC__lpc_restore_signal
;
380 /* now override with asm where appropriate */
382 if(decoder
->private_
->cpuinfo
.use_asm
) {
383 #ifdef FLAC__CPU_IA32
384 FLAC__ASSERT(decoder
->private_
->cpuinfo
.type
== FLAC__CPUINFO_TYPE_IA32
);
385 #ifdef FLAC__HAS_NASM
386 decoder
->private_
->local_lpc_restore_signal_64bit
= FLAC__lpc_restore_signal_wide_asm_ia32
; /* OPT_IA32: was really necessary for GCC < 4.9 */
387 if (decoder
->private_
->cpuinfo
.x86
.mmx
) {
388 decoder
->private_
->local_lpc_restore_signal
= FLAC__lpc_restore_signal_asm_ia32
;
389 decoder
->private_
->local_lpc_restore_signal_16bit
= FLAC__lpc_restore_signal_asm_ia32_mmx
;
392 decoder
->private_
->local_lpc_restore_signal
= FLAC__lpc_restore_signal_asm_ia32
;
393 decoder
->private_
->local_lpc_restore_signal_16bit
= FLAC__lpc_restore_signal_asm_ia32
;
396 #if FLAC__HAS_X86INTRIN && ! defined FLAC__INTEGER_ONLY_LIBRARY
397 # if defined FLAC__SSE4_1_SUPPORTED
398 if (decoder
->private_
->cpuinfo
.x86
.sse41
) {
399 # if !defined FLAC__HAS_NASM /* these are not undoubtedly faster than their MMX ASM counterparts */
400 decoder
->private_
->local_lpc_restore_signal
= FLAC__lpc_restore_signal_intrin_sse41
;
401 decoder
->private_
->local_lpc_restore_signal_16bit
= FLAC__lpc_restore_signal_16_intrin_sse41
;
403 decoder
->private_
->local_lpc_restore_signal_64bit
= FLAC__lpc_restore_signal_wide_intrin_sse41
;
407 #elif defined FLAC__CPU_X86_64
408 FLAC__ASSERT(decoder
->private_
->cpuinfo
.type
== FLAC__CPUINFO_TYPE_X86_64
);
409 /* No useful SSE optimizations yet */
414 /* from here on, errors are fatal */
416 if(!FLAC__bitreader_init(decoder
->private_
->input
, read_callback_
, decoder
)) {
417 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
418 return FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR
;
421 decoder
->private_
->read_callback
= read_callback
;
422 decoder
->private_
->seek_callback
= seek_callback
;
423 decoder
->private_
->tell_callback
= tell_callback
;
424 decoder
->private_
->length_callback
= length_callback
;
425 decoder
->private_
->eof_callback
= eof_callback
;
426 decoder
->private_
->write_callback
= write_callback
;
427 decoder
->private_
->metadata_callback
= metadata_callback
;
428 decoder
->private_
->error_callback
= error_callback
;
429 decoder
->private_
->client_data
= client_data
;
430 decoder
->private_
->fixed_block_size
= decoder
->private_
->next_fixed_block_size
= 0;
431 decoder
->private_
->samples_decoded
= 0;
432 decoder
->private_
->has_stream_info
= false;
433 decoder
->private_
->cached
= false;
435 decoder
->private_
->do_md5_checking
= decoder
->protected_
->md5_checking
;
436 decoder
->private_
->is_seeking
= false;
438 decoder
->private_
->internal_reset_hack
= true; /* so the following reset does not try to rewind the input */
439 if(!FLAC__stream_decoder_reset(decoder
)) {
440 /* above call sets the state for us */
441 return FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR
;
444 return FLAC__STREAM_DECODER_INIT_STATUS_OK
;
447 FLAC_API FLAC__StreamDecoderInitStatus
FLAC__stream_decoder_init_stream(
448 FLAC__StreamDecoder
*decoder
,
449 FLAC__StreamDecoderReadCallback read_callback
,
450 FLAC__StreamDecoderSeekCallback seek_callback
,
451 FLAC__StreamDecoderTellCallback tell_callback
,
452 FLAC__StreamDecoderLengthCallback length_callback
,
453 FLAC__StreamDecoderEofCallback eof_callback
,
454 FLAC__StreamDecoderWriteCallback write_callback
,
455 FLAC__StreamDecoderMetadataCallback metadata_callback
,
456 FLAC__StreamDecoderErrorCallback error_callback
,
460 return init_stream_internal_(
475 FLAC_API FLAC__StreamDecoderInitStatus
FLAC__stream_decoder_init_ogg_stream(
476 FLAC__StreamDecoder
*decoder
,
477 FLAC__StreamDecoderReadCallback read_callback
,
478 FLAC__StreamDecoderSeekCallback seek_callback
,
479 FLAC__StreamDecoderTellCallback tell_callback
,
480 FLAC__StreamDecoderLengthCallback length_callback
,
481 FLAC__StreamDecoderEofCallback eof_callback
,
482 FLAC__StreamDecoderWriteCallback write_callback
,
483 FLAC__StreamDecoderMetadataCallback metadata_callback
,
484 FLAC__StreamDecoderErrorCallback error_callback
,
488 return init_stream_internal_(
503 static FLAC__StreamDecoderInitStatus
init_FILE_internal_(
504 FLAC__StreamDecoder
*decoder
,
506 FLAC__StreamDecoderWriteCallback write_callback
,
507 FLAC__StreamDecoderMetadataCallback metadata_callback
,
508 FLAC__StreamDecoderErrorCallback error_callback
,
513 FLAC__ASSERT(0 != decoder
);
514 FLAC__ASSERT(0 != file
);
516 if(decoder
->protected_
->state
!= FLAC__STREAM_DECODER_UNINITIALIZED
)
517 return decoder
->protected_
->initstate
= FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED
;
519 if(0 == write_callback
|| 0 == error_callback
)
520 return decoder
->protected_
->initstate
= FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS
;
523 * To make sure that our file does not go unclosed after an error, we
524 * must assign the FILE pointer before any further error can occur in
528 file
= get_binary_stdin_(); /* just to be safe */
530 decoder
->private_
->file
= file
;
532 return init_stream_internal_(
535 decoder
->private_
->file
== stdin
? 0: file_seek_callback_
,
536 decoder
->private_
->file
== stdin
? 0: file_tell_callback_
,
537 decoder
->private_
->file
== stdin
? 0: file_length_callback_
,
547 FLAC_API FLAC__StreamDecoderInitStatus
FLAC__stream_decoder_init_FILE(
548 FLAC__StreamDecoder
*decoder
,
550 FLAC__StreamDecoderWriteCallback write_callback
,
551 FLAC__StreamDecoderMetadataCallback metadata_callback
,
552 FLAC__StreamDecoderErrorCallback error_callback
,
556 return init_FILE_internal_(decoder
, file
, write_callback
, metadata_callback
, error_callback
, client_data
, /*is_ogg=*/false);
559 FLAC_API FLAC__StreamDecoderInitStatus
FLAC__stream_decoder_init_ogg_FILE(
560 FLAC__StreamDecoder
*decoder
,
562 FLAC__StreamDecoderWriteCallback write_callback
,
563 FLAC__StreamDecoderMetadataCallback metadata_callback
,
564 FLAC__StreamDecoderErrorCallback error_callback
,
568 return init_FILE_internal_(decoder
, file
, write_callback
, metadata_callback
, error_callback
, client_data
, /*is_ogg=*/true);
571 static FLAC__StreamDecoderInitStatus
init_file_internal_(
572 FLAC__StreamDecoder
*decoder
,
573 const char *filename
,
574 FLAC__StreamDecoderWriteCallback write_callback
,
575 FLAC__StreamDecoderMetadataCallback metadata_callback
,
576 FLAC__StreamDecoderErrorCallback error_callback
,
583 FLAC__ASSERT(0 != decoder
);
586 * To make sure that our file does not go unclosed after an error, we
587 * have to do the same entrance checks here that are later performed
588 * in FLAC__stream_decoder_init_FILE() before the FILE* is assigned.
590 if(decoder
->protected_
->state
!= FLAC__STREAM_DECODER_UNINITIALIZED
)
591 return decoder
->protected_
->initstate
= FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED
;
593 if(0 == write_callback
|| 0 == error_callback
)
594 return decoder
->protected_
->initstate
= FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS
;
596 file
= filename
? flac_fopen(filename
, "rb") : stdin
;
599 return FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE
;
601 return init_FILE_internal_(decoder
, file
, write_callback
, metadata_callback
, error_callback
, client_data
, is_ogg
);
604 FLAC_API FLAC__StreamDecoderInitStatus
FLAC__stream_decoder_init_file(
605 FLAC__StreamDecoder
*decoder
,
606 const char *filename
,
607 FLAC__StreamDecoderWriteCallback write_callback
,
608 FLAC__StreamDecoderMetadataCallback metadata_callback
,
609 FLAC__StreamDecoderErrorCallback error_callback
,
613 return init_file_internal_(decoder
, filename
, write_callback
, metadata_callback
, error_callback
, client_data
, /*is_ogg=*/false);
616 FLAC_API FLAC__StreamDecoderInitStatus
FLAC__stream_decoder_init_ogg_file(
617 FLAC__StreamDecoder
*decoder
,
618 const char *filename
,
619 FLAC__StreamDecoderWriteCallback write_callback
,
620 FLAC__StreamDecoderMetadataCallback metadata_callback
,
621 FLAC__StreamDecoderErrorCallback error_callback
,
625 return init_file_internal_(decoder
, filename
, write_callback
, metadata_callback
, error_callback
, client_data
, /*is_ogg=*/true);
628 FLAC_API FLAC__bool
FLAC__stream_decoder_finish(FLAC__StreamDecoder
*decoder
)
630 FLAC__bool md5_failed
= false;
633 FLAC__ASSERT(0 != decoder
);
634 FLAC__ASSERT(0 != decoder
->private_
);
635 FLAC__ASSERT(0 != decoder
->protected_
);
637 if(decoder
->protected_
->state
== FLAC__STREAM_DECODER_UNINITIALIZED
)
640 /* see the comment in FLAC__stream_decoder_reset() as to why we
641 * always call FLAC__MD5Final()
643 FLAC__MD5Final(decoder
->private_
->computed_md5sum
, &decoder
->private_
->md5context
);
645 free(decoder
->private_
->seek_table
.data
.seek_table
.points
);
646 decoder
->private_
->seek_table
.data
.seek_table
.points
= 0;
647 decoder
->private_
->has_seek_table
= false;
649 FLAC__bitreader_free(decoder
->private_
->input
);
650 for(i
= 0; i
< FLAC__MAX_CHANNELS
; i
++) {
652 * FLAC__lpc_restore_signal_asm_ia32_mmx() and ..._intrin_sseN()
653 * require that the output arrays have a buffer of up to 3 zeroes
654 * in front (at negative indices) for alignment purposes;
655 * we use 4 to keep the data well-aligned.
657 if(0 != decoder
->private_
->output
[i
]) {
658 free(decoder
->private_
->output
[i
]-4);
659 decoder
->private_
->output
[i
] = 0;
661 if(0 != decoder
->private_
->residual_unaligned
[i
]) {
662 free(decoder
->private_
->residual_unaligned
[i
]);
663 decoder
->private_
->residual_unaligned
[i
] = decoder
->private_
->residual
[i
] = 0;
666 decoder
->private_
->output_capacity
= 0;
667 decoder
->private_
->output_channels
= 0;
670 if(decoder
->private_
->is_ogg
)
671 FLAC__ogg_decoder_aspect_finish(&decoder
->protected_
->ogg_decoder_aspect
);
674 if(0 != decoder
->private_
->file
) {
675 if(decoder
->private_
->file
!= stdin
)
676 fclose(decoder
->private_
->file
);
677 decoder
->private_
->file
= 0;
680 if(decoder
->private_
->do_md5_checking
) {
681 if(memcmp(decoder
->private_
->stream_info
.data
.stream_info
.md5sum
, decoder
->private_
->computed_md5sum
, 16))
684 decoder
->private_
->is_seeking
= false;
686 set_defaults_(decoder
);
688 decoder
->protected_
->state
= FLAC__STREAM_DECODER_UNINITIALIZED
;
693 FLAC_API FLAC__bool
FLAC__stream_decoder_set_ogg_serial_number(FLAC__StreamDecoder
*decoder
, long value
)
695 FLAC__ASSERT(0 != decoder
);
696 FLAC__ASSERT(0 != decoder
->private_
);
697 FLAC__ASSERT(0 != decoder
->protected_
);
698 if(decoder
->protected_
->state
!= FLAC__STREAM_DECODER_UNINITIALIZED
)
701 /* can't check decoder->private_->is_ogg since that's not set until init time */
702 FLAC__ogg_decoder_aspect_set_serial_number(&decoder
->protected_
->ogg_decoder_aspect
, value
);
710 FLAC_API FLAC__bool
FLAC__stream_decoder_set_md5_checking(FLAC__StreamDecoder
*decoder
, FLAC__bool value
)
712 FLAC__ASSERT(0 != decoder
);
713 FLAC__ASSERT(0 != decoder
->protected_
);
714 if(decoder
->protected_
->state
!= FLAC__STREAM_DECODER_UNINITIALIZED
)
716 decoder
->protected_
->md5_checking
= value
;
720 FLAC_API FLAC__bool
FLAC__stream_decoder_set_metadata_respond(FLAC__StreamDecoder
*decoder
, FLAC__MetadataType type
)
722 FLAC__ASSERT(0 != decoder
);
723 FLAC__ASSERT(0 != decoder
->private_
);
724 FLAC__ASSERT(0 != decoder
->protected_
);
725 FLAC__ASSERT((uint32_t)type
<= FLAC__MAX_METADATA_TYPE_CODE
);
726 /* double protection */
727 if((uint32_t)type
> FLAC__MAX_METADATA_TYPE_CODE
)
729 if(decoder
->protected_
->state
!= FLAC__STREAM_DECODER_UNINITIALIZED
)
731 decoder
->private_
->metadata_filter
[type
] = true;
732 if(type
== FLAC__METADATA_TYPE_APPLICATION
)
733 decoder
->private_
->metadata_filter_ids_count
= 0;
737 FLAC_API FLAC__bool
FLAC__stream_decoder_set_metadata_respond_application(FLAC__StreamDecoder
*decoder
, const FLAC__byte id
[4])
739 FLAC__ASSERT(0 != decoder
);
740 FLAC__ASSERT(0 != decoder
->private_
);
741 FLAC__ASSERT(0 != decoder
->protected_
);
742 FLAC__ASSERT(0 != id
);
743 if(decoder
->protected_
->state
!= FLAC__STREAM_DECODER_UNINITIALIZED
)
746 if(decoder
->private_
->metadata_filter
[FLAC__METADATA_TYPE_APPLICATION
])
749 FLAC__ASSERT(0 != decoder
->private_
->metadata_filter_ids
);
751 if(decoder
->private_
->metadata_filter_ids_count
== decoder
->private_
->metadata_filter_ids_capacity
) {
752 if(0 == (decoder
->private_
->metadata_filter_ids
= safe_realloc_mul_2op_(decoder
->private_
->metadata_filter_ids
, decoder
->private_
->metadata_filter_ids_capacity
, /*times*/2))) {
753 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
756 decoder
->private_
->metadata_filter_ids_capacity
*= 2;
759 memcpy(decoder
->private_
->metadata_filter_ids
+ decoder
->private_
->metadata_filter_ids_count
* (FLAC__STREAM_METADATA_APPLICATION_ID_LEN
/8), id
, (FLAC__STREAM_METADATA_APPLICATION_ID_LEN
/8));
760 decoder
->private_
->metadata_filter_ids_count
++;
765 FLAC_API FLAC__bool
FLAC__stream_decoder_set_metadata_respond_all(FLAC__StreamDecoder
*decoder
)
768 FLAC__ASSERT(0 != decoder
);
769 FLAC__ASSERT(0 != decoder
->private_
);
770 FLAC__ASSERT(0 != decoder
->protected_
);
771 if(decoder
->protected_
->state
!= FLAC__STREAM_DECODER_UNINITIALIZED
)
773 for(i
= 0; i
< sizeof(decoder
->private_
->metadata_filter
) / sizeof(decoder
->private_
->metadata_filter
[0]); i
++)
774 decoder
->private_
->metadata_filter
[i
] = true;
775 decoder
->private_
->metadata_filter_ids_count
= 0;
779 FLAC_API FLAC__bool
FLAC__stream_decoder_set_metadata_ignore(FLAC__StreamDecoder
*decoder
, FLAC__MetadataType type
)
781 FLAC__ASSERT(0 != decoder
);
782 FLAC__ASSERT(0 != decoder
->private_
);
783 FLAC__ASSERT(0 != decoder
->protected_
);
784 FLAC__ASSERT((uint32_t)type
<= FLAC__MAX_METADATA_TYPE_CODE
);
785 /* double protection */
786 if((uint32_t)type
> FLAC__MAX_METADATA_TYPE_CODE
)
788 if(decoder
->protected_
->state
!= FLAC__STREAM_DECODER_UNINITIALIZED
)
790 decoder
->private_
->metadata_filter
[type
] = false;
791 if(type
== FLAC__METADATA_TYPE_APPLICATION
)
792 decoder
->private_
->metadata_filter_ids_count
= 0;
796 FLAC_API FLAC__bool
FLAC__stream_decoder_set_metadata_ignore_application(FLAC__StreamDecoder
*decoder
, const FLAC__byte id
[4])
798 FLAC__ASSERT(0 != decoder
);
799 FLAC__ASSERT(0 != decoder
->private_
);
800 FLAC__ASSERT(0 != decoder
->protected_
);
801 FLAC__ASSERT(0 != id
);
802 if(decoder
->protected_
->state
!= FLAC__STREAM_DECODER_UNINITIALIZED
)
805 if(!decoder
->private_
->metadata_filter
[FLAC__METADATA_TYPE_APPLICATION
])
808 FLAC__ASSERT(0 != decoder
->private_
->metadata_filter_ids
);
810 if(decoder
->private_
->metadata_filter_ids_count
== decoder
->private_
->metadata_filter_ids_capacity
) {
811 if(0 == (decoder
->private_
->metadata_filter_ids
= safe_realloc_mul_2op_(decoder
->private_
->metadata_filter_ids
, decoder
->private_
->metadata_filter_ids_capacity
, /*times*/2))) {
812 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
815 decoder
->private_
->metadata_filter_ids_capacity
*= 2;
818 memcpy(decoder
->private_
->metadata_filter_ids
+ decoder
->private_
->metadata_filter_ids_count
* (FLAC__STREAM_METADATA_APPLICATION_ID_LEN
/8), id
, (FLAC__STREAM_METADATA_APPLICATION_ID_LEN
/8));
819 decoder
->private_
->metadata_filter_ids_count
++;
824 FLAC_API FLAC__bool
FLAC__stream_decoder_set_metadata_ignore_all(FLAC__StreamDecoder
*decoder
)
826 FLAC__ASSERT(0 != decoder
);
827 FLAC__ASSERT(0 != decoder
->private_
);
828 FLAC__ASSERT(0 != decoder
->protected_
);
829 if(decoder
->protected_
->state
!= FLAC__STREAM_DECODER_UNINITIALIZED
)
831 memset(decoder
->private_
->metadata_filter
, 0, sizeof(decoder
->private_
->metadata_filter
));
832 decoder
->private_
->metadata_filter_ids_count
= 0;
836 FLAC_API FLAC__StreamDecoderState
FLAC__stream_decoder_get_state(const FLAC__StreamDecoder
*decoder
)
838 FLAC__ASSERT(0 != decoder
);
839 FLAC__ASSERT(0 != decoder
->protected_
);
840 return decoder
->protected_
->state
;
843 FLAC_API
const char *FLAC__stream_decoder_get_resolved_state_string(const FLAC__StreamDecoder
*decoder
)
845 return FLAC__StreamDecoderStateString
[decoder
->protected_
->state
];
848 FLAC_API FLAC__bool
FLAC__stream_decoder_get_md5_checking(const FLAC__StreamDecoder
*decoder
)
850 FLAC__ASSERT(0 != decoder
);
851 FLAC__ASSERT(0 != decoder
->protected_
);
852 return decoder
->protected_
->md5_checking
;
855 FLAC_API FLAC__uint64
FLAC__stream_decoder_get_total_samples(const FLAC__StreamDecoder
*decoder
)
857 FLAC__ASSERT(0 != decoder
);
858 FLAC__ASSERT(0 != decoder
->protected_
);
859 return decoder
->private_
->has_stream_info
? decoder
->private_
->stream_info
.data
.stream_info
.total_samples
: 0;
862 FLAC_API
uint32_t FLAC__stream_decoder_get_channels(const FLAC__StreamDecoder
*decoder
)
864 FLAC__ASSERT(0 != decoder
);
865 FLAC__ASSERT(0 != decoder
->protected_
);
866 return decoder
->protected_
->channels
;
869 FLAC_API FLAC__ChannelAssignment
FLAC__stream_decoder_get_channel_assignment(const FLAC__StreamDecoder
*decoder
)
871 FLAC__ASSERT(0 != decoder
);
872 FLAC__ASSERT(0 != decoder
->protected_
);
873 return decoder
->protected_
->channel_assignment
;
876 FLAC_API
uint32_t FLAC__stream_decoder_get_bits_per_sample(const FLAC__StreamDecoder
*decoder
)
878 FLAC__ASSERT(0 != decoder
);
879 FLAC__ASSERT(0 != decoder
->protected_
);
880 return decoder
->protected_
->bits_per_sample
;
883 FLAC_API
uint32_t FLAC__stream_decoder_get_sample_rate(const FLAC__StreamDecoder
*decoder
)
885 FLAC__ASSERT(0 != decoder
);
886 FLAC__ASSERT(0 != decoder
->protected_
);
887 return decoder
->protected_
->sample_rate
;
890 FLAC_API
uint32_t FLAC__stream_decoder_get_blocksize(const FLAC__StreamDecoder
*decoder
)
892 FLAC__ASSERT(0 != decoder
);
893 FLAC__ASSERT(0 != decoder
->protected_
);
894 return decoder
->protected_
->blocksize
;
897 FLAC_API FLAC__bool
FLAC__stream_decoder_get_decode_position(const FLAC__StreamDecoder
*decoder
, FLAC__uint64
*position
)
899 FLAC__ASSERT(0 != decoder
);
900 FLAC__ASSERT(0 != decoder
->private_
);
901 FLAC__ASSERT(0 != position
);
903 if(FLAC__HAS_OGG
&& decoder
->private_
->is_ogg
)
906 if(0 == decoder
->private_
->tell_callback
)
908 if(decoder
->private_
->tell_callback(decoder
, position
, decoder
->private_
->client_data
) != FLAC__STREAM_DECODER_TELL_STATUS_OK
)
910 /* should never happen since all FLAC frames and metadata blocks are byte aligned, but check just in case */
911 if(!FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
))
913 FLAC__ASSERT(*position
>= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder
));
914 *position
-= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder
);
918 FLAC_API FLAC__bool
FLAC__stream_decoder_flush(FLAC__StreamDecoder
*decoder
)
920 FLAC__ASSERT(0 != decoder
);
921 FLAC__ASSERT(0 != decoder
->private_
);
922 FLAC__ASSERT(0 != decoder
->protected_
);
924 if(!decoder
->private_
->internal_reset_hack
&& decoder
->protected_
->state
== FLAC__STREAM_DECODER_UNINITIALIZED
)
927 decoder
->private_
->samples_decoded
= 0;
928 decoder
->private_
->do_md5_checking
= false;
931 if(decoder
->private_
->is_ogg
)
932 FLAC__ogg_decoder_aspect_flush(&decoder
->protected_
->ogg_decoder_aspect
);
935 if(!FLAC__bitreader_clear(decoder
->private_
->input
)) {
936 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
939 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
944 FLAC_API FLAC__bool
FLAC__stream_decoder_reset(FLAC__StreamDecoder
*decoder
)
946 FLAC__ASSERT(0 != decoder
);
947 FLAC__ASSERT(0 != decoder
->private_
);
948 FLAC__ASSERT(0 != decoder
->protected_
);
950 if(!FLAC__stream_decoder_flush(decoder
)) {
951 /* above call sets the state for us */
956 /*@@@ could go in !internal_reset_hack block below */
957 if(decoder
->private_
->is_ogg
)
958 FLAC__ogg_decoder_aspect_reset(&decoder
->protected_
->ogg_decoder_aspect
);
961 /* Rewind if necessary. If FLAC__stream_decoder_init() is calling us,
962 * (internal_reset_hack) don't try to rewind since we are already at
963 * the beginning of the stream and don't want to fail if the input is
966 if(!decoder
->private_
->internal_reset_hack
) {
967 if(decoder
->private_
->file
== stdin
)
968 return false; /* can't rewind stdin, reset fails */
969 if(decoder
->private_
->seek_callback
&& decoder
->private_
->seek_callback(decoder
, 0, decoder
->private_
->client_data
) == FLAC__STREAM_DECODER_SEEK_STATUS_ERROR
)
970 return false; /* seekable and seek fails, reset fails */
973 decoder
->private_
->internal_reset_hack
= false;
975 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_METADATA
;
977 decoder
->private_
->has_stream_info
= false;
979 free(decoder
->private_
->seek_table
.data
.seek_table
.points
);
980 decoder
->private_
->seek_table
.data
.seek_table
.points
= 0;
981 decoder
->private_
->has_seek_table
= false;
983 decoder
->private_
->do_md5_checking
= decoder
->protected_
->md5_checking
;
985 * This goes in reset() and not flush() because according to the spec, a
986 * fixed-blocksize stream must stay that way through the whole stream.
988 decoder
->private_
->fixed_block_size
= decoder
->private_
->next_fixed_block_size
= 0;
990 /* We initialize the FLAC__MD5Context even though we may never use it. This
991 * is because md5 checking may be turned on to start and then turned off if
992 * a seek occurs. So we init the context here and finalize it in
993 * FLAC__stream_decoder_finish() to make sure things are always cleaned up
996 FLAC__MD5Init(&decoder
->private_
->md5context
);
998 decoder
->private_
->first_frame_offset
= 0;
999 decoder
->private_
->unparseable_frame_count
= 0;
1004 FLAC_API FLAC__bool
FLAC__stream_decoder_process_single(FLAC__StreamDecoder
*decoder
)
1006 FLAC__bool got_a_frame
;
1007 FLAC__ASSERT(0 != decoder
);
1008 FLAC__ASSERT(0 != decoder
->protected_
);
1011 switch(decoder
->protected_
->state
) {
1012 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA
:
1013 if(!find_metadata_(decoder
))
1014 return false; /* above function sets the status for us */
1016 case FLAC__STREAM_DECODER_READ_METADATA
:
1017 if(!read_metadata_(decoder
))
1018 return false; /* above function sets the status for us */
1021 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
:
1022 if(!frame_sync_(decoder
))
1023 return true; /* above function sets the status for us */
1025 case FLAC__STREAM_DECODER_READ_FRAME
:
1026 if(!read_frame_(decoder
, &got_a_frame
, /*do_full_decode=*/true))
1027 return false; /* above function sets the status for us */
1029 return true; /* above function sets the status for us */
1031 case FLAC__STREAM_DECODER_END_OF_STREAM
:
1032 case FLAC__STREAM_DECODER_ABORTED
:
1041 FLAC_API FLAC__bool
FLAC__stream_decoder_process_until_end_of_metadata(FLAC__StreamDecoder
*decoder
)
1043 FLAC__ASSERT(0 != decoder
);
1044 FLAC__ASSERT(0 != decoder
->protected_
);
1047 switch(decoder
->protected_
->state
) {
1048 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA
:
1049 if(!find_metadata_(decoder
))
1050 return false; /* above function sets the status for us */
1052 case FLAC__STREAM_DECODER_READ_METADATA
:
1053 if(!read_metadata_(decoder
))
1054 return false; /* above function sets the status for us */
1056 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
:
1057 case FLAC__STREAM_DECODER_READ_FRAME
:
1058 case FLAC__STREAM_DECODER_END_OF_STREAM
:
1059 case FLAC__STREAM_DECODER_ABORTED
:
1068 FLAC_API FLAC__bool
FLAC__stream_decoder_process_until_end_of_stream(FLAC__StreamDecoder
*decoder
)
1071 FLAC__ASSERT(0 != decoder
);
1072 FLAC__ASSERT(0 != decoder
->protected_
);
1075 switch(decoder
->protected_
->state
) {
1076 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA
:
1077 if(!find_metadata_(decoder
))
1078 return false; /* above function sets the status for us */
1080 case FLAC__STREAM_DECODER_READ_METADATA
:
1081 if(!read_metadata_(decoder
))
1082 return false; /* above function sets the status for us */
1084 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
:
1085 if(!frame_sync_(decoder
))
1086 return true; /* above function sets the status for us */
1088 case FLAC__STREAM_DECODER_READ_FRAME
:
1089 if(!read_frame_(decoder
, &dummy
, /*do_full_decode=*/true))
1090 return false; /* above function sets the status for us */
1092 case FLAC__STREAM_DECODER_END_OF_STREAM
:
1093 case FLAC__STREAM_DECODER_ABORTED
:
1102 FLAC_API FLAC__bool
FLAC__stream_decoder_skip_single_frame(FLAC__StreamDecoder
*decoder
)
1104 FLAC__bool got_a_frame
;
1105 FLAC__ASSERT(0 != decoder
);
1106 FLAC__ASSERT(0 != decoder
->protected_
);
1109 switch(decoder
->protected_
->state
) {
1110 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA
:
1111 case FLAC__STREAM_DECODER_READ_METADATA
:
1112 return false; /* above function sets the status for us */
1113 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
:
1114 if(!frame_sync_(decoder
))
1115 return true; /* above function sets the status for us */
1117 case FLAC__STREAM_DECODER_READ_FRAME
:
1118 if(!read_frame_(decoder
, &got_a_frame
, /*do_full_decode=*/false))
1119 return false; /* above function sets the status for us */
1121 return true; /* above function sets the status for us */
1123 case FLAC__STREAM_DECODER_END_OF_STREAM
:
1124 case FLAC__STREAM_DECODER_ABORTED
:
1133 FLAC_API FLAC__bool
FLAC__stream_decoder_seek_absolute(FLAC__StreamDecoder
*decoder
, FLAC__uint64 sample
)
1135 FLAC__uint64 length
;
1137 FLAC__ASSERT(0 != decoder
);
1140 decoder
->protected_
->state
!= FLAC__STREAM_DECODER_SEARCH_FOR_METADATA
&&
1141 decoder
->protected_
->state
!= FLAC__STREAM_DECODER_READ_METADATA
&&
1142 decoder
->protected_
->state
!= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
&&
1143 decoder
->protected_
->state
!= FLAC__STREAM_DECODER_READ_FRAME
&&
1144 decoder
->protected_
->state
!= FLAC__STREAM_DECODER_END_OF_STREAM
1148 if(0 == decoder
->private_
->seek_callback
)
1151 FLAC__ASSERT(decoder
->private_
->seek_callback
);
1152 FLAC__ASSERT(decoder
->private_
->tell_callback
);
1153 FLAC__ASSERT(decoder
->private_
->length_callback
);
1154 FLAC__ASSERT(decoder
->private_
->eof_callback
);
1156 if(FLAC__stream_decoder_get_total_samples(decoder
) > 0 && sample
>= FLAC__stream_decoder_get_total_samples(decoder
))
1159 decoder
->private_
->is_seeking
= true;
1161 /* turn off md5 checking if a seek is attempted */
1162 decoder
->private_
->do_md5_checking
= false;
1164 /* get the file length (currently our algorithm needs to know the length so it's also an error to get FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED) */
1165 if(decoder
->private_
->length_callback(decoder
, &length
, decoder
->private_
->client_data
) != FLAC__STREAM_DECODER_LENGTH_STATUS_OK
) {
1166 decoder
->private_
->is_seeking
= false;
1170 /* if we haven't finished processing the metadata yet, do that so we have the STREAMINFO, SEEK_TABLE, and first_frame_offset */
1172 decoder
->protected_
->state
== FLAC__STREAM_DECODER_SEARCH_FOR_METADATA
||
1173 decoder
->protected_
->state
== FLAC__STREAM_DECODER_READ_METADATA
1175 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder
)) {
1176 /* above call sets the state for us */
1177 decoder
->private_
->is_seeking
= false;
1180 /* check this again in case we didn't know total_samples the first time */
1181 if(FLAC__stream_decoder_get_total_samples(decoder
) > 0 && sample
>= FLAC__stream_decoder_get_total_samples(decoder
)) {
1182 decoder
->private_
->is_seeking
= false;
1188 const FLAC__bool ok
=
1190 decoder
->private_
->is_ogg
?
1191 seek_to_absolute_sample_ogg_(decoder
, length
, sample
) :
1193 seek_to_absolute_sample_(decoder
, length
, sample
)
1195 decoder
->private_
->is_seeking
= false;
1200 /***********************************************************************
1202 * Protected class methods
1204 ***********************************************************************/
1206 uint32_t FLAC__stream_decoder_get_input_bytes_unconsumed(const FLAC__StreamDecoder
*decoder
)
1208 FLAC__ASSERT(0 != decoder
);
1209 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
));
1210 FLAC__ASSERT(!(FLAC__bitreader_get_input_bits_unconsumed(decoder
->private_
->input
) & 7));
1211 return FLAC__bitreader_get_input_bits_unconsumed(decoder
->private_
->input
) / 8;
1214 /***********************************************************************
1216 * Private class methods
1218 ***********************************************************************/
1220 void set_defaults_(FLAC__StreamDecoder
*decoder
)
1222 decoder
->private_
->is_ogg
= false;
1223 decoder
->private_
->read_callback
= 0;
1224 decoder
->private_
->seek_callback
= 0;
1225 decoder
->private_
->tell_callback
= 0;
1226 decoder
->private_
->length_callback
= 0;
1227 decoder
->private_
->eof_callback
= 0;
1228 decoder
->private_
->write_callback
= 0;
1229 decoder
->private_
->metadata_callback
= 0;
1230 decoder
->private_
->error_callback
= 0;
1231 decoder
->private_
->client_data
= 0;
1233 memset(decoder
->private_
->metadata_filter
, 0, sizeof(decoder
->private_
->metadata_filter
));
1234 decoder
->private_
->metadata_filter
[FLAC__METADATA_TYPE_STREAMINFO
] = true;
1235 decoder
->private_
->metadata_filter_ids_count
= 0;
1237 decoder
->protected_
->md5_checking
= false;
1240 FLAC__ogg_decoder_aspect_set_defaults(&decoder
->protected_
->ogg_decoder_aspect
);
1245 * This will forcibly set stdin to binary mode (for OSes that require it)
1247 FILE *get_binary_stdin_(void)
1249 /* if something breaks here it is probably due to the presence or
1250 * absence of an underscore before the identifiers 'setmode',
1251 * 'fileno', and/or 'O_BINARY'; check your system header files.
1253 #if defined _MSC_VER || defined __MINGW32__
1254 _setmode(_fileno(stdin
), _O_BINARY
);
1255 #elif defined __EMX__
1256 setmode(fileno(stdin
), O_BINARY
);
1262 FLAC__bool
allocate_output_(FLAC__StreamDecoder
*decoder
, uint32_t size
, uint32_t channels
)
1267 if(size
<= decoder
->private_
->output_capacity
&& channels
<= decoder
->private_
->output_channels
)
1270 /* simply using realloc() is not practical because the number of channels may change mid-stream */
1272 for(i
= 0; i
< FLAC__MAX_CHANNELS
; i
++) {
1273 if(0 != decoder
->private_
->output
[i
]) {
1274 free(decoder
->private_
->output
[i
]-4);
1275 decoder
->private_
->output
[i
] = 0;
1277 if(0 != decoder
->private_
->residual_unaligned
[i
]) {
1278 free(decoder
->private_
->residual_unaligned
[i
]);
1279 decoder
->private_
->residual_unaligned
[i
] = decoder
->private_
->residual
[i
] = 0;
1283 for(i
= 0; i
< channels
; i
++) {
1285 * FLAC__lpc_restore_signal_asm_ia32_mmx() and ..._intrin_sseN()
1286 * require that the output arrays have a buffer of up to 3 zeroes
1287 * in front (at negative indices) for alignment purposes;
1288 * we use 4 to keep the data well-aligned.
1290 tmp
= safe_malloc_muladd2_(sizeof(FLAC__int32
), /*times (*/size
, /*+*/4/*)*/);
1292 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1295 memset(tmp
, 0, sizeof(FLAC__int32
)*4);
1296 decoder
->private_
->output
[i
] = tmp
+ 4;
1298 if(!FLAC__memory_alloc_aligned_int32_array(size
, &decoder
->private_
->residual_unaligned
[i
], &decoder
->private_
->residual
[i
])) {
1299 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1304 decoder
->private_
->output_capacity
= size
;
1305 decoder
->private_
->output_channels
= channels
;
1310 FLAC__bool
has_id_filtered_(FLAC__StreamDecoder
*decoder
, FLAC__byte
*id
)
1314 FLAC__ASSERT(0 != decoder
);
1315 FLAC__ASSERT(0 != decoder
->private_
);
1317 for(i
= 0; i
< decoder
->private_
->metadata_filter_ids_count
; i
++)
1318 if(0 == memcmp(decoder
->private_
->metadata_filter_ids
+ i
* (FLAC__STREAM_METADATA_APPLICATION_ID_LEN
/8), id
, (FLAC__STREAM_METADATA_APPLICATION_ID_LEN
/8)))
1324 FLAC__bool
find_metadata_(FLAC__StreamDecoder
*decoder
)
1328 FLAC__bool first
= true;
1330 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
));
1332 for(i
= id
= 0; i
< 4; ) {
1333 if(decoder
->private_
->cached
) {
1334 x
= (FLAC__uint32
)decoder
->private_
->lookahead
;
1335 decoder
->private_
->cached
= false;
1338 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, 8))
1339 return false; /* read_callback_ sets the state for us */
1341 if(x
== FLAC__STREAM_SYNC_STRING
[i
]) {
1351 if(x
== ID3V2_TAG_
[id
]) {
1355 if(!skip_id3v2_tag_(decoder
))
1356 return false; /* skip_id3v2_tag_ sets the state for us */
1361 if(x
== 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1362 decoder
->private_
->header_warmup
[0] = (FLAC__byte
)x
;
1363 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, 8))
1364 return false; /* read_callback_ sets the state for us */
1366 /* we have to check if we just read two 0xff's in a row; the second may actually be the beginning of the sync code */
1367 /* else we have to check if the second byte is the end of a sync code */
1368 if(x
== 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1369 decoder
->private_
->lookahead
= (FLAC__byte
)x
;
1370 decoder
->private_
->cached
= true;
1372 else if(x
>> 1 == 0x7c) { /* MAGIC NUMBER for the last 6 sync bits and reserved 7th bit */
1373 decoder
->private_
->header_warmup
[1] = (FLAC__byte
)x
;
1374 decoder
->protected_
->state
= FLAC__STREAM_DECODER_READ_FRAME
;
1380 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC
);
1385 decoder
->protected_
->state
= FLAC__STREAM_DECODER_READ_METADATA
;
1389 FLAC__bool
read_metadata_(FLAC__StreamDecoder
*decoder
)
1392 FLAC__uint32 i
, x
, type
, length
;
1394 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
));
1396 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_IS_LAST_LEN
))
1397 return false; /* read_callback_ sets the state for us */
1398 is_last
= x
? true : false;
1400 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &type
, FLAC__STREAM_METADATA_TYPE_LEN
))
1401 return false; /* read_callback_ sets the state for us */
1403 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &length
, FLAC__STREAM_METADATA_LENGTH_LEN
))
1404 return false; /* read_callback_ sets the state for us */
1406 if(type
== FLAC__METADATA_TYPE_STREAMINFO
) {
1407 if(!read_metadata_streaminfo_(decoder
, is_last
, length
))
1410 decoder
->private_
->has_stream_info
= true;
1411 if(0 == memcmp(decoder
->private_
->stream_info
.data
.stream_info
.md5sum
, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16))
1412 decoder
->private_
->do_md5_checking
= false;
1413 if(!decoder
->private_
->is_seeking
&& decoder
->private_
->metadata_filter
[FLAC__METADATA_TYPE_STREAMINFO
] && decoder
->private_
->metadata_callback
)
1414 decoder
->private_
->metadata_callback(decoder
, &decoder
->private_
->stream_info
, decoder
->private_
->client_data
);
1416 else if(type
== FLAC__METADATA_TYPE_SEEKTABLE
) {
1417 /* just in case we already have a seek table, and reading the next one fails: */
1418 decoder
->private_
->has_seek_table
= false;
1420 if(!read_metadata_seektable_(decoder
, is_last
, length
))
1423 decoder
->private_
->has_seek_table
= true;
1424 if(!decoder
->private_
->is_seeking
&& decoder
->private_
->metadata_filter
[FLAC__METADATA_TYPE_SEEKTABLE
] && decoder
->private_
->metadata_callback
)
1425 decoder
->private_
->metadata_callback(decoder
, &decoder
->private_
->seek_table
, decoder
->private_
->client_data
);
1428 FLAC__bool skip_it
= !decoder
->private_
->metadata_filter
[type
];
1429 uint32_t real_length
= length
;
1430 FLAC__StreamMetadata block
;
1432 memset(&block
, 0, sizeof(block
));
1433 block
.is_last
= is_last
;
1434 block
.type
= (FLAC__MetadataType
)type
;
1435 block
.length
= length
;
1437 if(type
== FLAC__METADATA_TYPE_APPLICATION
) {
1438 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder
->private_
->input
, block
.data
.application
.id
, FLAC__STREAM_METADATA_APPLICATION_ID_LEN
/8))
1439 return false; /* read_callback_ sets the state for us */
1441 if(real_length
< FLAC__STREAM_METADATA_APPLICATION_ID_LEN
/8) { /* underflow check */
1442 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;/*@@@@@@ maybe wrong error? need to resync?*/
1446 real_length
-= FLAC__STREAM_METADATA_APPLICATION_ID_LEN
/8;
1448 if(decoder
->private_
->metadata_filter_ids_count
> 0 && has_id_filtered_(decoder
, block
.data
.application
.id
))
1453 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder
->private_
->input
, real_length
))
1454 return false; /* read_callback_ sets the state for us */
1457 FLAC__bool ok
= true;
1459 case FLAC__METADATA_TYPE_PADDING
:
1460 /* skip the padding bytes */
1461 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder
->private_
->input
, real_length
))
1462 ok
= false; /* read_callback_ sets the state for us */
1464 case FLAC__METADATA_TYPE_APPLICATION
:
1465 /* remember, we read the ID already */
1466 if(real_length
> 0) {
1467 if(0 == (block
.data
.application
.data
= malloc(real_length
))) {
1468 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1471 else if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder
->private_
->input
, block
.data
.application
.data
, real_length
))
1472 ok
= false; /* read_callback_ sets the state for us */
1475 block
.data
.application
.data
= 0;
1477 case FLAC__METADATA_TYPE_VORBIS_COMMENT
:
1478 if(!read_metadata_vorbiscomment_(decoder
, &block
.data
.vorbis_comment
, real_length
))
1481 case FLAC__METADATA_TYPE_CUESHEET
:
1482 if(!read_metadata_cuesheet_(decoder
, &block
.data
.cue_sheet
))
1485 case FLAC__METADATA_TYPE_PICTURE
:
1486 if(!read_metadata_picture_(decoder
, &block
.data
.picture
))
1489 case FLAC__METADATA_TYPE_STREAMINFO
:
1490 case FLAC__METADATA_TYPE_SEEKTABLE
:
1494 if(real_length
> 0) {
1495 if(0 == (block
.data
.unknown
.data
= malloc(real_length
))) {
1496 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1499 else if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder
->private_
->input
, block
.data
.unknown
.data
, real_length
))
1500 ok
= false; /* read_callback_ sets the state for us */
1503 block
.data
.unknown
.data
= 0;
1506 if(ok
&& !decoder
->private_
->is_seeking
&& decoder
->private_
->metadata_callback
)
1507 decoder
->private_
->metadata_callback(decoder
, &block
, decoder
->private_
->client_data
);
1509 /* now we have to free any malloc()ed data in the block */
1511 case FLAC__METADATA_TYPE_PADDING
:
1513 case FLAC__METADATA_TYPE_APPLICATION
:
1514 if(0 != block
.data
.application
.data
)
1515 free(block
.data
.application
.data
);
1517 case FLAC__METADATA_TYPE_VORBIS_COMMENT
:
1518 if(0 != block
.data
.vorbis_comment
.vendor_string
.entry
)
1519 free(block
.data
.vorbis_comment
.vendor_string
.entry
);
1520 if(block
.data
.vorbis_comment
.num_comments
> 0)
1521 for(i
= 0; i
< block
.data
.vorbis_comment
.num_comments
; i
++)
1522 if(0 != block
.data
.vorbis_comment
.comments
[i
].entry
)
1523 free(block
.data
.vorbis_comment
.comments
[i
].entry
);
1524 if(0 != block
.data
.vorbis_comment
.comments
)
1525 free(block
.data
.vorbis_comment
.comments
);
1527 case FLAC__METADATA_TYPE_CUESHEET
:
1528 if(block
.data
.cue_sheet
.num_tracks
> 0)
1529 for(i
= 0; i
< block
.data
.cue_sheet
.num_tracks
; i
++)
1530 if(0 != block
.data
.cue_sheet
.tracks
[i
].indices
)
1531 free(block
.data
.cue_sheet
.tracks
[i
].indices
);
1532 if(0 != block
.data
.cue_sheet
.tracks
)
1533 free(block
.data
.cue_sheet
.tracks
);
1535 case FLAC__METADATA_TYPE_PICTURE
:
1536 if(0 != block
.data
.picture
.mime_type
)
1537 free(block
.data
.picture
.mime_type
);
1538 if(0 != block
.data
.picture
.description
)
1539 free(block
.data
.picture
.description
);
1540 if(0 != block
.data
.picture
.data
)
1541 free(block
.data
.picture
.data
);
1543 case FLAC__METADATA_TYPE_STREAMINFO
:
1544 case FLAC__METADATA_TYPE_SEEKTABLE
:
1547 if(0 != block
.data
.unknown
.data
)
1548 free(block
.data
.unknown
.data
);
1552 if(!ok
) /* anything that unsets "ok" should also make sure decoder->protected_->state is updated */
1558 /* if this fails, it's OK, it's just a hint for the seek routine */
1559 if(!FLAC__stream_decoder_get_decode_position(decoder
, &decoder
->private_
->first_frame_offset
))
1560 decoder
->private_
->first_frame_offset
= 0;
1561 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
1567 FLAC__bool
read_metadata_streaminfo_(FLAC__StreamDecoder
*decoder
, FLAC__bool is_last
, uint32_t length
)
1570 uint32_t bits
, used_bits
= 0;
1572 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
));
1574 decoder
->private_
->stream_info
.type
= FLAC__METADATA_TYPE_STREAMINFO
;
1575 decoder
->private_
->stream_info
.is_last
= is_last
;
1576 decoder
->private_
->stream_info
.length
= length
;
1578 bits
= FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN
;
1579 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, bits
))
1580 return false; /* read_callback_ sets the state for us */
1581 decoder
->private_
->stream_info
.data
.stream_info
.min_blocksize
= x
;
1584 bits
= FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN
;
1585 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN
))
1586 return false; /* read_callback_ sets the state for us */
1587 decoder
->private_
->stream_info
.data
.stream_info
.max_blocksize
= x
;
1590 bits
= FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN
;
1591 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN
))
1592 return false; /* read_callback_ sets the state for us */
1593 decoder
->private_
->stream_info
.data
.stream_info
.min_framesize
= x
;
1596 bits
= FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN
;
1597 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN
))
1598 return false; /* read_callback_ sets the state for us */
1599 decoder
->private_
->stream_info
.data
.stream_info
.max_framesize
= x
;
1602 bits
= FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN
;
1603 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN
))
1604 return false; /* read_callback_ sets the state for us */
1605 decoder
->private_
->stream_info
.data
.stream_info
.sample_rate
= x
;
1608 bits
= FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN
;
1609 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN
))
1610 return false; /* read_callback_ sets the state for us */
1611 decoder
->private_
->stream_info
.data
.stream_info
.channels
= x
+1;
1614 bits
= FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN
;
1615 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN
))
1616 return false; /* read_callback_ sets the state for us */
1617 decoder
->private_
->stream_info
.data
.stream_info
.bits_per_sample
= x
+1;
1620 bits
= FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN
;
1621 if(!FLAC__bitreader_read_raw_uint64(decoder
->private_
->input
, &decoder
->private_
->stream_info
.data
.stream_info
.total_samples
, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN
))
1622 return false; /* read_callback_ sets the state for us */
1625 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder
->private_
->input
, decoder
->private_
->stream_info
.data
.stream_info
.md5sum
, 16))
1626 return false; /* read_callback_ sets the state for us */
1629 /* skip the rest of the block */
1630 FLAC__ASSERT(used_bits
% 8 == 0);
1631 length
-= (used_bits
/ 8);
1632 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder
->private_
->input
, length
))
1633 return false; /* read_callback_ sets the state for us */
1638 FLAC__bool
read_metadata_seektable_(FLAC__StreamDecoder
*decoder
, FLAC__bool is_last
, uint32_t length
)
1643 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
));
1645 decoder
->private_
->seek_table
.type
= FLAC__METADATA_TYPE_SEEKTABLE
;
1646 decoder
->private_
->seek_table
.is_last
= is_last
;
1647 decoder
->private_
->seek_table
.length
= length
;
1649 decoder
->private_
->seek_table
.data
.seek_table
.num_points
= length
/ FLAC__STREAM_METADATA_SEEKPOINT_LENGTH
;
1651 /* use realloc since we may pass through here several times (e.g. after seeking) */
1652 if(0 == (decoder
->private_
->seek_table
.data
.seek_table
.points
= safe_realloc_mul_2op_(decoder
->private_
->seek_table
.data
.seek_table
.points
, decoder
->private_
->seek_table
.data
.seek_table
.num_points
, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint
)))) {
1653 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1656 for(i
= 0; i
< decoder
->private_
->seek_table
.data
.seek_table
.num_points
; i
++) {
1657 if(!FLAC__bitreader_read_raw_uint64(decoder
->private_
->input
, &xx
, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN
))
1658 return false; /* read_callback_ sets the state for us */
1659 decoder
->private_
->seek_table
.data
.seek_table
.points
[i
].sample_number
= xx
;
1661 if(!FLAC__bitreader_read_raw_uint64(decoder
->private_
->input
, &xx
, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN
))
1662 return false; /* read_callback_ sets the state for us */
1663 decoder
->private_
->seek_table
.data
.seek_table
.points
[i
].stream_offset
= xx
;
1665 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN
))
1666 return false; /* read_callback_ sets the state for us */
1667 decoder
->private_
->seek_table
.data
.seek_table
.points
[i
].frame_samples
= x
;
1669 length
-= (decoder
->private_
->seek_table
.data
.seek_table
.num_points
* FLAC__STREAM_METADATA_SEEKPOINT_LENGTH
);
1670 /* if there is a partial point left, skip over it */
1672 /*@@@ do a send_error_to_client_() here? there's an argument for either way */
1673 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder
->private_
->input
, length
))
1674 return false; /* read_callback_ sets the state for us */
1680 FLAC__bool
read_metadata_vorbiscomment_(FLAC__StreamDecoder
*decoder
, FLAC__StreamMetadata_VorbisComment
*obj
, uint32_t length
)
1684 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
));
1686 /* read vendor string */
1688 length
-= 8; /* vendor string length + num comments entries alone take 8 bytes */
1689 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN
== 32);
1690 if (!FLAC__bitreader_read_uint32_little_endian(decoder
->private_
->input
, &obj
->vendor_string
.length
))
1691 return false; /* read_callback_ sets the state for us */
1692 if (obj
->vendor_string
.length
> 0) {
1693 if (length
< obj
->vendor_string
.length
) {
1694 obj
->vendor_string
.length
= 0;
1695 obj
->vendor_string
.entry
= 0;
1699 length
-= obj
->vendor_string
.length
;
1700 if (0 == (obj
->vendor_string
.entry
= safe_malloc_add_2op_(obj
->vendor_string
.length
, /*+*/1))) {
1701 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1704 if (!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder
->private_
->input
, obj
->vendor_string
.entry
, obj
->vendor_string
.length
))
1705 return false; /* read_callback_ sets the state for us */
1706 obj
->vendor_string
.entry
[obj
->vendor_string
.length
] = '\0';
1709 obj
->vendor_string
.entry
= 0;
1711 /* read num comments */
1712 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN
== 32);
1713 if (!FLAC__bitreader_read_uint32_little_endian(decoder
->private_
->input
, &obj
->num_comments
))
1714 return false; /* read_callback_ sets the state for us */
1717 if (obj
->num_comments
> 100000) {
1718 /* Possibly malicious file. */
1719 obj
->num_comments
= 0;
1722 if (obj
->num_comments
> 0) {
1723 if (0 == (obj
->comments
= safe_malloc_mul_2op_p(obj
->num_comments
, /*times*/sizeof(FLAC__StreamMetadata_VorbisComment_Entry
)))) {
1724 obj
->num_comments
= 0;
1725 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1728 for (i
= 0; i
< obj
->num_comments
; i
++) {
1729 /* Initialize here just to make sure. */
1730 obj
->comments
[i
].length
= 0;
1731 obj
->comments
[i
].entry
= 0;
1733 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN
== 32);
1735 obj
->num_comments
= i
;
1740 if (!FLAC__bitreader_read_uint32_little_endian(decoder
->private_
->input
, &obj
->comments
[i
].length
)) {
1741 obj
->num_comments
= i
;
1742 return false; /* read_callback_ sets the state for us */
1744 if (obj
->comments
[i
].length
> 0) {
1745 if (length
< obj
->comments
[i
].length
) {
1746 obj
->num_comments
= i
;
1750 length
-= obj
->comments
[i
].length
;
1751 if (0 == (obj
->comments
[i
].entry
= safe_malloc_add_2op_(obj
->comments
[i
].length
, /*+*/1))) {
1752 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1753 obj
->num_comments
= i
;
1756 memset (obj
->comments
[i
].entry
, 0, obj
->comments
[i
].length
) ;
1757 if (!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder
->private_
->input
, obj
->comments
[i
].entry
, obj
->comments
[i
].length
)) {
1758 /* Current i-th entry is bad, so we delete it. */
1759 free (obj
->comments
[i
].entry
) ;
1760 obj
->comments
[i
].entry
= NULL
;
1761 obj
->num_comments
= i
;
1764 obj
->comments
[i
].entry
[obj
->comments
[i
].length
] = '\0';
1767 obj
->comments
[i
].entry
= 0;
1774 /* length > 0 can only happen on files with invalid data in comments */
1775 if(obj
->num_comments
< 1) {
1776 free(obj
->comments
);
1777 obj
->comments
= NULL
;
1779 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder
->private_
->input
, length
))
1780 return false; /* read_callback_ sets the state for us */
1786 FLAC__bool
read_metadata_cuesheet_(FLAC__StreamDecoder
*decoder
, FLAC__StreamMetadata_CueSheet
*obj
)
1788 FLAC__uint32 i
, j
, x
;
1790 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
));
1792 memset(obj
, 0, sizeof(FLAC__StreamMetadata_CueSheet
));
1794 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN
% 8 == 0);
1795 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder
->private_
->input
, (FLAC__byte
*)obj
->media_catalog_number
, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN
/8))
1796 return false; /* read_callback_ sets the state for us */
1798 if(!FLAC__bitreader_read_raw_uint64(decoder
->private_
->input
, &obj
->lead_in
, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN
))
1799 return false; /* read_callback_ sets the state for us */
1801 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN
))
1802 return false; /* read_callback_ sets the state for us */
1803 obj
->is_cd
= x
? true : false;
1805 if(!FLAC__bitreader_skip_bits_no_crc(decoder
->private_
->input
, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN
))
1806 return false; /* read_callback_ sets the state for us */
1808 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN
))
1809 return false; /* read_callback_ sets the state for us */
1810 obj
->num_tracks
= x
;
1812 if(obj
->num_tracks
> 0) {
1813 if(0 == (obj
->tracks
= safe_calloc_(obj
->num_tracks
, sizeof(FLAC__StreamMetadata_CueSheet_Track
)))) {
1814 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1817 for(i
= 0; i
< obj
->num_tracks
; i
++) {
1818 FLAC__StreamMetadata_CueSheet_Track
*track
= &obj
->tracks
[i
];
1819 if(!FLAC__bitreader_read_raw_uint64(decoder
->private_
->input
, &track
->offset
, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN
))
1820 return false; /* read_callback_ sets the state for us */
1822 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN
))
1823 return false; /* read_callback_ sets the state for us */
1824 track
->number
= (FLAC__byte
)x
;
1826 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN
% 8 == 0);
1827 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder
->private_
->input
, (FLAC__byte
*)track
->isrc
, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN
/8))
1828 return false; /* read_callback_ sets the state for us */
1830 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN
))
1831 return false; /* read_callback_ sets the state for us */
1834 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN
))
1835 return false; /* read_callback_ sets the state for us */
1836 track
->pre_emphasis
= x
;
1838 if(!FLAC__bitreader_skip_bits_no_crc(decoder
->private_
->input
, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN
))
1839 return false; /* read_callback_ sets the state for us */
1841 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN
))
1842 return false; /* read_callback_ sets the state for us */
1843 track
->num_indices
= (FLAC__byte
)x
;
1845 if(track
->num_indices
> 0) {
1846 if(0 == (track
->indices
= safe_calloc_(track
->num_indices
, sizeof(FLAC__StreamMetadata_CueSheet_Index
)))) {
1847 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1850 for(j
= 0; j
< track
->num_indices
; j
++) {
1851 FLAC__StreamMetadata_CueSheet_Index
*indx
= &track
->indices
[j
];
1852 if(!FLAC__bitreader_read_raw_uint64(decoder
->private_
->input
, &indx
->offset
, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN
))
1853 return false; /* read_callback_ sets the state for us */
1855 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN
))
1856 return false; /* read_callback_ sets the state for us */
1857 indx
->number
= (FLAC__byte
)x
;
1859 if(!FLAC__bitreader_skip_bits_no_crc(decoder
->private_
->input
, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN
))
1860 return false; /* read_callback_ sets the state for us */
1869 FLAC__bool
read_metadata_picture_(FLAC__StreamDecoder
*decoder
, FLAC__StreamMetadata_Picture
*obj
)
1873 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
));
1876 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN
))
1877 return false; /* read_callback_ sets the state for us */
1880 /* read MIME type */
1881 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN
))
1882 return false; /* read_callback_ sets the state for us */
1883 if(0 == (obj
->mime_type
= safe_malloc_add_2op_(x
, /*+*/1))) {
1884 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1888 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder
->private_
->input
, (FLAC__byte
*)obj
->mime_type
, x
))
1889 return false; /* read_callback_ sets the state for us */
1891 obj
->mime_type
[x
] = '\0';
1893 /* read description */
1894 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN
))
1895 return false; /* read_callback_ sets the state for us */
1896 if(0 == (obj
->description
= safe_malloc_add_2op_(x
, /*+*/1))) {
1897 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1901 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder
->private_
->input
, obj
->description
, x
))
1902 return false; /* read_callback_ sets the state for us */
1904 obj
->description
[x
] = '\0';
1907 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &obj
->width
, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN
))
1908 return false; /* read_callback_ sets the state for us */
1911 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &obj
->height
, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN
))
1912 return false; /* read_callback_ sets the state for us */
1915 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &obj
->depth
, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN
))
1916 return false; /* read_callback_ sets the state for us */
1919 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &obj
->colors
, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN
))
1920 return false; /* read_callback_ sets the state for us */
1923 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &(obj
->data_length
), FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN
))
1924 return false; /* read_callback_ sets the state for us */
1925 if(0 == (obj
->data
= safe_malloc_(obj
->data_length
))) {
1926 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
1929 if(obj
->data_length
> 0) {
1930 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder
->private_
->input
, obj
->data
, obj
->data_length
))
1931 return false; /* read_callback_ sets the state for us */
1937 FLAC__bool
skip_id3v2_tag_(FLAC__StreamDecoder
*decoder
)
1942 /* skip the version and flags bytes */
1943 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, 24))
1944 return false; /* read_callback_ sets the state for us */
1945 /* get the size (in bytes) to skip */
1947 for(i
= 0; i
< 4; i
++) {
1948 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, 8))
1949 return false; /* read_callback_ sets the state for us */
1953 /* skip the rest of the tag */
1954 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder
->private_
->input
, skip
))
1955 return false; /* read_callback_ sets the state for us */
1959 FLAC__bool
frame_sync_(FLAC__StreamDecoder
*decoder
)
1962 FLAC__bool first
= true;
1964 /* If we know the total number of samples in the stream, stop if we've read that many. */
1965 /* This will stop us, for example, from wasting time trying to sync on an ID3V1 tag. */
1966 if(FLAC__stream_decoder_get_total_samples(decoder
) > 0) {
1967 if(decoder
->private_
->samples_decoded
>= FLAC__stream_decoder_get_total_samples(decoder
)) {
1968 decoder
->protected_
->state
= FLAC__STREAM_DECODER_END_OF_STREAM
;
1973 /* make sure we're byte aligned */
1974 if(!FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
)) {
1975 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__bitreader_bits_left_for_byte_alignment(decoder
->private_
->input
)))
1976 return false; /* read_callback_ sets the state for us */
1980 if(decoder
->private_
->cached
) {
1981 x
= (FLAC__uint32
)decoder
->private_
->lookahead
;
1982 decoder
->private_
->cached
= false;
1985 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, 8))
1986 return false; /* read_callback_ sets the state for us */
1988 if(x
== 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1989 decoder
->private_
->header_warmup
[0] = (FLAC__byte
)x
;
1990 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, 8))
1991 return false; /* read_callback_ sets the state for us */
1993 /* we have to check if we just read two 0xff's in a row; the second may actually be the beginning of the sync code */
1994 /* else we have to check if the second byte is the end of a sync code */
1995 if(x
== 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1996 decoder
->private_
->lookahead
= (FLAC__byte
)x
;
1997 decoder
->private_
->cached
= true;
1999 else if(x
>> 1 == 0x7c) { /* MAGIC NUMBER for the last 6 sync bits and reserved 7th bit */
2000 decoder
->private_
->header_warmup
[1] = (FLAC__byte
)x
;
2001 decoder
->protected_
->state
= FLAC__STREAM_DECODER_READ_FRAME
;
2006 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC
);
2014 FLAC__bool
read_frame_(FLAC__StreamDecoder
*decoder
, FLAC__bool
*got_a_frame
, FLAC__bool do_full_decode
)
2018 FLAC__int32 mid
, side
;
2019 uint32_t frame_crc
; /* the one we calculate from the input stream */
2022 *got_a_frame
= false;
2026 frame_crc
= FLAC__CRC16_UPDATE(decoder
->private_
->header_warmup
[0], frame_crc
);
2027 frame_crc
= FLAC__CRC16_UPDATE(decoder
->private_
->header_warmup
[1], frame_crc
);
2028 FLAC__bitreader_reset_read_crc16(decoder
->private_
->input
, (FLAC__uint16
)frame_crc
);
2030 if(!read_frame_header_(decoder
))
2032 if(decoder
->protected_
->state
== FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
) /* means we didn't sync on a valid header */
2034 if(!allocate_output_(decoder
, decoder
->private_
->frame
.header
.blocksize
, decoder
->private_
->frame
.header
.channels
))
2036 for(channel
= 0; channel
< decoder
->private_
->frame
.header
.channels
; channel
++) {
2038 * first figure the correct bits-per-sample of the subframe
2040 uint32_t bps
= decoder
->private_
->frame
.header
.bits_per_sample
;
2041 switch(decoder
->private_
->frame
.header
.channel_assignment
) {
2042 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT
:
2043 /* no adjustment needed */
2045 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE
:
2046 FLAC__ASSERT(decoder
->private_
->frame
.header
.channels
== 2);
2050 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE
:
2051 FLAC__ASSERT(decoder
->private_
->frame
.header
.channels
== 2);
2055 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE
:
2056 FLAC__ASSERT(decoder
->private_
->frame
.header
.channels
== 2);
2066 if(!read_subframe_(decoder
, channel
, bps
, do_full_decode
))
2068 if(decoder
->protected_
->state
== FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
) /* means bad sync or got corruption */
2071 if(!read_zero_padding_(decoder
))
2073 if(decoder
->protected_
->state
== FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
) /* means bad sync or got corruption (i.e. "zero bits" were not all zeroes) */
2077 * Read the frame CRC-16 from the footer and check
2079 frame_crc
= FLAC__bitreader_get_read_crc16(decoder
->private_
->input
);
2080 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, FLAC__FRAME_FOOTER_CRC_LEN
))
2081 return false; /* read_callback_ sets the state for us */
2082 if(frame_crc
== x
) {
2083 if(do_full_decode
) {
2084 /* Undo any special channel coding */
2085 switch(decoder
->private_
->frame
.header
.channel_assignment
) {
2086 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT
:
2089 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE
:
2090 FLAC__ASSERT(decoder
->private_
->frame
.header
.channels
== 2);
2091 for(i
= 0; i
< decoder
->private_
->frame
.header
.blocksize
; i
++)
2092 decoder
->private_
->output
[1][i
] = decoder
->private_
->output
[0][i
] - decoder
->private_
->output
[1][i
];
2094 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE
:
2095 FLAC__ASSERT(decoder
->private_
->frame
.header
.channels
== 2);
2096 for(i
= 0; i
< decoder
->private_
->frame
.header
.blocksize
; i
++)
2097 decoder
->private_
->output
[0][i
] += decoder
->private_
->output
[1][i
];
2099 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE
:
2100 FLAC__ASSERT(decoder
->private_
->frame
.header
.channels
== 2);
2101 for(i
= 0; i
< decoder
->private_
->frame
.header
.blocksize
; i
++) {
2103 mid
= decoder
->private_
->output
[0][i
];
2104 side
= decoder
->private_
->output
[1][i
];
2105 mid
= ((uint32_t) mid
) << 1;
2106 mid
|= (side
& 1); /* i.e. if 'side' is odd... */
2107 decoder
->private_
->output
[0][i
] = (mid
+ side
) >> 1;
2108 decoder
->private_
->output
[1][i
] = (mid
- side
) >> 1;
2110 /* OPT: without 'side' temp variable */
2111 mid
= (decoder
->private_
->output
[0][i
] << 1) | (decoder
->private_
->output
[1][i
] & 1); /* i.e. if 'side' is odd... */
2112 decoder
->private_
->output
[0][i
] = (mid
+ decoder
->private_
->output
[1][i
]) >> 1;
2113 decoder
->private_
->output
[1][i
] = (mid
- decoder
->private_
->output
[1][i
]) >> 1;
2124 /* Bad frame, emit error and zero the output signal */
2125 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH
);
2126 if(do_full_decode
) {
2127 for(channel
= 0; channel
< decoder
->private_
->frame
.header
.channels
; channel
++) {
2128 memset(decoder
->private_
->output
[channel
], 0, sizeof(FLAC__int32
) * decoder
->private_
->frame
.header
.blocksize
);
2133 *got_a_frame
= true;
2135 /* we wait to update fixed_block_size until here, when we're sure we've got a proper frame and hence a correct blocksize */
2136 if(decoder
->private_
->next_fixed_block_size
)
2137 decoder
->private_
->fixed_block_size
= decoder
->private_
->next_fixed_block_size
;
2139 /* put the latest values into the public section of the decoder instance */
2140 decoder
->protected_
->channels
= decoder
->private_
->frame
.header
.channels
;
2141 decoder
->protected_
->channel_assignment
= decoder
->private_
->frame
.header
.channel_assignment
;
2142 decoder
->protected_
->bits_per_sample
= decoder
->private_
->frame
.header
.bits_per_sample
;
2143 decoder
->protected_
->sample_rate
= decoder
->private_
->frame
.header
.sample_rate
;
2144 decoder
->protected_
->blocksize
= decoder
->private_
->frame
.header
.blocksize
;
2146 FLAC__ASSERT(decoder
->private_
->frame
.header
.number_type
== FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER
);
2147 decoder
->private_
->samples_decoded
= decoder
->private_
->frame
.header
.number
.sample_number
+ decoder
->private_
->frame
.header
.blocksize
;
2150 if(do_full_decode
) {
2151 if(write_audio_frame_to_client_(decoder
, &decoder
->private_
->frame
, (const FLAC__int32
* const *)decoder
->private_
->output
) != FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE
) {
2152 decoder
->protected_
->state
= FLAC__STREAM_DECODER_ABORTED
;
2157 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2161 FLAC__bool
read_frame_header_(FLAC__StreamDecoder
*decoder
)
2165 uint32_t i
, blocksize_hint
= 0, sample_rate_hint
= 0;
2166 FLAC__byte crc8
, raw_header
[16]; /* MAGIC NUMBER based on the maximum frame header size, including CRC */
2167 uint32_t raw_header_len
;
2168 FLAC__bool is_unparseable
= false;
2170 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
));
2172 /* init the raw header with the saved bits from synchronization */
2173 raw_header
[0] = decoder
->private_
->header_warmup
[0];
2174 raw_header
[1] = decoder
->private_
->header_warmup
[1];
2177 /* check to make sure that reserved bit is 0 */
2178 if(raw_header
[1] & 0x02) /* MAGIC NUMBER */
2179 is_unparseable
= true;
2182 * Note that along the way as we read the header, we look for a sync
2183 * code inside. If we find one it would indicate that our original
2184 * sync was bad since there cannot be a sync code in a valid header.
2186 * Three kinds of things can go wrong when reading the frame header:
2187 * 1) We may have sync'ed incorrectly and not landed on a frame header.
2188 * If we don't find a sync code, it can end up looking like we read
2189 * a valid but unparseable header, until getting to the frame header
2190 * CRC. Even then we could get a false positive on the CRC.
2191 * 2) We may have sync'ed correctly but on an unparseable frame (from a
2193 * 3) We may be on a damaged frame which appears valid but unparseable.
2195 * For all these reasons, we try and read a complete frame header as
2196 * long as it seems valid, even if unparseable, up until the frame
2201 * read in the raw header as bytes so we can CRC it, and parse it on the way
2203 for(i
= 0; i
< 2; i
++) {
2204 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, 8))
2205 return false; /* read_callback_ sets the state for us */
2206 if(x
== 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
2207 /* if we get here it means our original sync was erroneous since the sync code cannot appear in the header */
2208 decoder
->private_
->lookahead
= (FLAC__byte
)x
;
2209 decoder
->private_
->cached
= true;
2210 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER
);
2211 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2214 raw_header
[raw_header_len
++] = (FLAC__byte
)x
;
2217 switch(x
= raw_header
[2] >> 4) {
2219 is_unparseable
= true;
2222 decoder
->private_
->frame
.header
.blocksize
= 192;
2228 decoder
->private_
->frame
.header
.blocksize
= 576 << (x
-2);
2242 decoder
->private_
->frame
.header
.blocksize
= 256 << (x
-8);
2249 switch(x
= raw_header
[2] & 0x0f) {
2251 if(decoder
->private_
->has_stream_info
)
2252 decoder
->private_
->frame
.header
.sample_rate
= decoder
->private_
->stream_info
.data
.stream_info
.sample_rate
;
2254 is_unparseable
= true;
2257 decoder
->private_
->frame
.header
.sample_rate
= 88200;
2260 decoder
->private_
->frame
.header
.sample_rate
= 176400;
2263 decoder
->private_
->frame
.header
.sample_rate
= 192000;
2266 decoder
->private_
->frame
.header
.sample_rate
= 8000;
2269 decoder
->private_
->frame
.header
.sample_rate
= 16000;
2272 decoder
->private_
->frame
.header
.sample_rate
= 22050;
2275 decoder
->private_
->frame
.header
.sample_rate
= 24000;
2278 decoder
->private_
->frame
.header
.sample_rate
= 32000;
2281 decoder
->private_
->frame
.header
.sample_rate
= 44100;
2284 decoder
->private_
->frame
.header
.sample_rate
= 48000;
2287 decoder
->private_
->frame
.header
.sample_rate
= 96000;
2292 sample_rate_hint
= x
;
2295 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER
);
2296 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2302 x
= (uint32_t)(raw_header
[3] >> 4);
2304 decoder
->private_
->frame
.header
.channels
= 2;
2307 decoder
->private_
->frame
.header
.channel_assignment
= FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE
;
2310 decoder
->private_
->frame
.header
.channel_assignment
= FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE
;
2313 decoder
->private_
->frame
.header
.channel_assignment
= FLAC__CHANNEL_ASSIGNMENT_MID_SIDE
;
2316 is_unparseable
= true;
2321 decoder
->private_
->frame
.header
.channels
= (uint32_t)x
+ 1;
2322 decoder
->private_
->frame
.header
.channel_assignment
= FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT
;
2325 switch(x
= (uint32_t)(raw_header
[3] & 0x0e) >> 1) {
2327 if(decoder
->private_
->has_stream_info
)
2328 decoder
->private_
->frame
.header
.bits_per_sample
= decoder
->private_
->stream_info
.data
.stream_info
.bits_per_sample
;
2330 is_unparseable
= true;
2333 decoder
->private_
->frame
.header
.bits_per_sample
= 8;
2336 decoder
->private_
->frame
.header
.bits_per_sample
= 12;
2339 decoder
->private_
->frame
.header
.bits_per_sample
= 16;
2342 decoder
->private_
->frame
.header
.bits_per_sample
= 20;
2345 decoder
->private_
->frame
.header
.bits_per_sample
= 24;
2349 is_unparseable
= true;
2356 /* check to make sure that reserved bit is 0 */
2357 if(raw_header
[3] & 0x01) /* MAGIC NUMBER */
2358 is_unparseable
= true;
2360 /* read the frame's starting sample number (or frame number as the case may be) */
2362 raw_header
[1] & 0x01 ||
2363 /*@@@ this clause is a concession to the old way of doing variable blocksize; the only known implementation is flake and can probably be removed without inconveniencing anyone */
2364 (decoder
->private_
->has_stream_info
&& decoder
->private_
->stream_info
.data
.stream_info
.min_blocksize
!= decoder
->private_
->stream_info
.data
.stream_info
.max_blocksize
)
2365 ) { /* variable blocksize */
2366 if(!FLAC__bitreader_read_utf8_uint64(decoder
->private_
->input
, &xx
, raw_header
, &raw_header_len
))
2367 return false; /* read_callback_ sets the state for us */
2368 if(xx
== FLAC__U64L(0xffffffffffffffff)) { /* i.e. non-UTF8 code... */
2369 decoder
->private_
->lookahead
= raw_header
[raw_header_len
-1]; /* back up as much as we can */
2370 decoder
->private_
->cached
= true;
2371 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER
);
2372 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2375 decoder
->private_
->frame
.header
.number_type
= FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER
;
2376 decoder
->private_
->frame
.header
.number
.sample_number
= xx
;
2378 else { /* fixed blocksize */
2379 if(!FLAC__bitreader_read_utf8_uint32(decoder
->private_
->input
, &x
, raw_header
, &raw_header_len
))
2380 return false; /* read_callback_ sets the state for us */
2381 if(x
== 0xffffffff) { /* i.e. non-UTF8 code... */
2382 decoder
->private_
->lookahead
= raw_header
[raw_header_len
-1]; /* back up as much as we can */
2383 decoder
->private_
->cached
= true;
2384 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER
);
2385 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2388 decoder
->private_
->frame
.header
.number_type
= FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER
;
2389 decoder
->private_
->frame
.header
.number
.frame_number
= x
;
2392 if(blocksize_hint
) {
2393 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, 8))
2394 return false; /* read_callback_ sets the state for us */
2395 raw_header
[raw_header_len
++] = (FLAC__byte
)x
;
2396 if(blocksize_hint
== 7) {
2398 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &_x
, 8))
2399 return false; /* read_callback_ sets the state for us */
2400 raw_header
[raw_header_len
++] = (FLAC__byte
)_x
;
2403 decoder
->private_
->frame
.header
.blocksize
= x
+1;
2406 if(sample_rate_hint
) {
2407 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, 8))
2408 return false; /* read_callback_ sets the state for us */
2409 raw_header
[raw_header_len
++] = (FLAC__byte
)x
;
2410 if(sample_rate_hint
!= 12) {
2412 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &_x
, 8))
2413 return false; /* read_callback_ sets the state for us */
2414 raw_header
[raw_header_len
++] = (FLAC__byte
)_x
;
2417 if(sample_rate_hint
== 12)
2418 decoder
->private_
->frame
.header
.sample_rate
= x
*1000;
2419 else if(sample_rate_hint
== 13)
2420 decoder
->private_
->frame
.header
.sample_rate
= x
;
2422 decoder
->private_
->frame
.header
.sample_rate
= x
*10;
2425 /* read the CRC-8 byte */
2426 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, 8))
2427 return false; /* read_callback_ sets the state for us */
2428 crc8
= (FLAC__byte
)x
;
2430 if(FLAC__crc8(raw_header
, raw_header_len
) != crc8
) {
2431 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER
);
2432 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2436 /* calculate the sample number from the frame number if needed */
2437 decoder
->private_
->next_fixed_block_size
= 0;
2438 if(decoder
->private_
->frame
.header
.number_type
== FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER
) {
2439 x
= decoder
->private_
->frame
.header
.number
.frame_number
;
2440 decoder
->private_
->frame
.header
.number_type
= FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER
;
2441 if(decoder
->private_
->fixed_block_size
)
2442 decoder
->private_
->frame
.header
.number
.sample_number
= (FLAC__uint64
)decoder
->private_
->fixed_block_size
* (FLAC__uint64
)x
;
2443 else if(decoder
->private_
->has_stream_info
) {
2444 if(decoder
->private_
->stream_info
.data
.stream_info
.min_blocksize
== decoder
->private_
->stream_info
.data
.stream_info
.max_blocksize
) {
2445 decoder
->private_
->frame
.header
.number
.sample_number
= (FLAC__uint64
)decoder
->private_
->stream_info
.data
.stream_info
.min_blocksize
* (FLAC__uint64
)x
;
2446 decoder
->private_
->next_fixed_block_size
= decoder
->private_
->stream_info
.data
.stream_info
.max_blocksize
;
2449 is_unparseable
= true;
2452 decoder
->private_
->frame
.header
.number
.sample_number
= 0;
2453 decoder
->private_
->next_fixed_block_size
= decoder
->private_
->frame
.header
.blocksize
;
2456 /* can only get here if the stream has invalid frame numbering and no STREAMINFO, so assume it's not the last (possibly short) frame */
2457 decoder
->private_
->frame
.header
.number
.sample_number
= (FLAC__uint64
)decoder
->private_
->frame
.header
.blocksize
* (FLAC__uint64
)x
;
2461 if(is_unparseable
) {
2462 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM
);
2463 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2470 FLAC__bool
read_subframe_(FLAC__StreamDecoder
*decoder
, uint32_t channel
, uint32_t bps
, FLAC__bool do_full_decode
)
2473 FLAC__bool wasted_bits
;
2476 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &x
, 8)) /* MAGIC NUMBER */
2477 return false; /* read_callback_ sets the state for us */
2479 wasted_bits
= (x
& 1);
2484 if(!FLAC__bitreader_read_unary_unsigned(decoder
->private_
->input
, &u
))
2485 return false; /* read_callback_ sets the state for us */
2486 decoder
->private_
->frame
.subframes
[channel
].wasted_bits
= u
+1;
2487 if (decoder
->private_
->frame
.subframes
[channel
].wasted_bits
>= bps
)
2489 bps
-= decoder
->private_
->frame
.subframes
[channel
].wasted_bits
;
2492 decoder
->private_
->frame
.subframes
[channel
].wasted_bits
= 0;
2495 * Lots of magic numbers here
2498 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC
);
2499 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2503 if(!read_subframe_constant_(decoder
, channel
, bps
, do_full_decode
))
2507 if(!read_subframe_verbatim_(decoder
, channel
, bps
, do_full_decode
))
2511 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM
);
2512 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2516 if(!read_subframe_fixed_(decoder
, channel
, bps
, (x
>>1)&7, do_full_decode
))
2518 if(decoder
->protected_
->state
== FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
) /* means bad sync or got corruption */
2522 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM
);
2523 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2527 if(!read_subframe_lpc_(decoder
, channel
, bps
, ((x
>>1)&31)+1, do_full_decode
))
2529 if(decoder
->protected_
->state
== FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
) /* means bad sync or got corruption */
2533 if(wasted_bits
&& do_full_decode
) {
2534 x
= decoder
->private_
->frame
.subframes
[channel
].wasted_bits
;
2535 for(i
= 0; i
< decoder
->private_
->frame
.header
.blocksize
; i
++) {
2536 uint32_t val
= decoder
->private_
->output
[channel
][i
];
2537 decoder
->private_
->output
[channel
][i
] = (val
<< x
);
2544 FLAC__bool
read_subframe_constant_(FLAC__StreamDecoder
*decoder
, uint32_t channel
, uint32_t bps
, FLAC__bool do_full_decode
)
2546 FLAC__Subframe_Constant
*subframe
= &decoder
->private_
->frame
.subframes
[channel
].data
.constant
;
2549 FLAC__int32
*output
= decoder
->private_
->output
[channel
];
2551 decoder
->private_
->frame
.subframes
[channel
].type
= FLAC__SUBFRAME_TYPE_CONSTANT
;
2553 if(!FLAC__bitreader_read_raw_int32(decoder
->private_
->input
, &x
, bps
))
2554 return false; /* read_callback_ sets the state for us */
2556 subframe
->value
= x
;
2558 /* decode the subframe */
2559 if(do_full_decode
) {
2560 for(i
= 0; i
< decoder
->private_
->frame
.header
.blocksize
; i
++)
2567 FLAC__bool
read_subframe_fixed_(FLAC__StreamDecoder
*decoder
, uint32_t channel
, uint32_t bps
, const uint32_t order
, FLAC__bool do_full_decode
)
2569 FLAC__Subframe_Fixed
*subframe
= &decoder
->private_
->frame
.subframes
[channel
].data
.fixed
;
2574 decoder
->private_
->frame
.subframes
[channel
].type
= FLAC__SUBFRAME_TYPE_FIXED
;
2576 subframe
->residual
= decoder
->private_
->residual
[channel
];
2577 subframe
->order
= order
;
2579 /* read warm-up samples */
2580 for(u
= 0; u
< order
; u
++) {
2581 if(!FLAC__bitreader_read_raw_int32(decoder
->private_
->input
, &i32
, bps
))
2582 return false; /* read_callback_ sets the state for us */
2583 subframe
->warmup
[u
] = i32
;
2586 /* read entropy coding method info */
2587 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &u32
, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN
))
2588 return false; /* read_callback_ sets the state for us */
2589 subframe
->entropy_coding_method
.type
= (FLAC__EntropyCodingMethodType
)u32
;
2590 switch(subframe
->entropy_coding_method
.type
) {
2591 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE
:
2592 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
:
2593 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &u32
, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN
))
2594 return false; /* read_callback_ sets the state for us */
2595 if(decoder
->private_
->frame
.header
.blocksize
>> u32
< order
) {
2596 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC
);
2597 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2600 subframe
->entropy_coding_method
.data
.partitioned_rice
.order
= u32
;
2601 subframe
->entropy_coding_method
.data
.partitioned_rice
.contents
= &decoder
->private_
->partitioned_rice_contents
[channel
];
2604 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM
);
2605 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2610 switch(subframe
->entropy_coding_method
.type
) {
2611 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE
:
2612 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
:
2613 if(!read_residual_partitioned_rice_(decoder
, order
, subframe
->entropy_coding_method
.data
.partitioned_rice
.order
, &decoder
->private_
->partitioned_rice_contents
[channel
], decoder
->private_
->residual
[channel
], /*is_extended=*/subframe
->entropy_coding_method
.type
== FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
))
2620 /* decode the subframe */
2621 if(do_full_decode
) {
2622 memcpy(decoder
->private_
->output
[channel
], subframe
->warmup
, sizeof(FLAC__int32
) * order
);
2623 FLAC__fixed_restore_signal(decoder
->private_
->residual
[channel
], decoder
->private_
->frame
.header
.blocksize
-order
, order
, decoder
->private_
->output
[channel
]+order
);
2629 FLAC__bool
read_subframe_lpc_(FLAC__StreamDecoder
*decoder
, uint32_t channel
, uint32_t bps
, const uint32_t order
, FLAC__bool do_full_decode
)
2631 FLAC__Subframe_LPC
*subframe
= &decoder
->private_
->frame
.subframes
[channel
].data
.lpc
;
2636 decoder
->private_
->frame
.subframes
[channel
].type
= FLAC__SUBFRAME_TYPE_LPC
;
2638 subframe
->residual
= decoder
->private_
->residual
[channel
];
2639 subframe
->order
= order
;
2641 /* read warm-up samples */
2642 for(u
= 0; u
< order
; u
++) {
2643 if(!FLAC__bitreader_read_raw_int32(decoder
->private_
->input
, &i32
, bps
))
2644 return false; /* read_callback_ sets the state for us */
2645 subframe
->warmup
[u
] = i32
;
2648 /* read qlp coeff precision */
2649 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &u32
, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN
))
2650 return false; /* read_callback_ sets the state for us */
2651 if(u32
== (1u << FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN
) - 1) {
2652 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC
);
2653 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2656 subframe
->qlp_coeff_precision
= u32
+1;
2658 /* read qlp shift */
2659 if(!FLAC__bitreader_read_raw_int32(decoder
->private_
->input
, &i32
, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN
))
2660 return false; /* read_callback_ sets the state for us */
2662 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC
);
2663 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2666 subframe
->quantization_level
= i32
;
2668 /* read quantized lp coefficiencts */
2669 for(u
= 0; u
< order
; u
++) {
2670 if(!FLAC__bitreader_read_raw_int32(decoder
->private_
->input
, &i32
, subframe
->qlp_coeff_precision
))
2671 return false; /* read_callback_ sets the state for us */
2672 subframe
->qlp_coeff
[u
] = i32
;
2675 /* read entropy coding method info */
2676 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &u32
, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN
))
2677 return false; /* read_callback_ sets the state for us */
2678 subframe
->entropy_coding_method
.type
= (FLAC__EntropyCodingMethodType
)u32
;
2679 switch(subframe
->entropy_coding_method
.type
) {
2680 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE
:
2681 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
:
2682 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &u32
, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN
))
2683 return false; /* read_callback_ sets the state for us */
2684 if(decoder
->private_
->frame
.header
.blocksize
>> u32
< order
) {
2685 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC
);
2686 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2689 subframe
->entropy_coding_method
.data
.partitioned_rice
.order
= u32
;
2690 subframe
->entropy_coding_method
.data
.partitioned_rice
.contents
= &decoder
->private_
->partitioned_rice_contents
[channel
];
2693 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM
);
2694 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2699 switch(subframe
->entropy_coding_method
.type
) {
2700 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE
:
2701 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
:
2702 if(!read_residual_partitioned_rice_(decoder
, order
, subframe
->entropy_coding_method
.data
.partitioned_rice
.order
, &decoder
->private_
->partitioned_rice_contents
[channel
], decoder
->private_
->residual
[channel
], /*is_extended=*/subframe
->entropy_coding_method
.type
== FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2
))
2709 /* decode the subframe */
2710 if(do_full_decode
) {
2711 memcpy(decoder
->private_
->output
[channel
], subframe
->warmup
, sizeof(FLAC__int32
) * order
);
2712 if(bps
+ subframe
->qlp_coeff_precision
+ FLAC__bitmath_ilog2(order
) <= 32)
2713 if(bps
<= 16 && subframe
->qlp_coeff_precision
<= 16)
2714 decoder
->private_
->local_lpc_restore_signal_16bit(decoder
->private_
->residual
[channel
], decoder
->private_
->frame
.header
.blocksize
-order
, subframe
->qlp_coeff
, order
, subframe
->quantization_level
, decoder
->private_
->output
[channel
]+order
);
2716 decoder
->private_
->local_lpc_restore_signal(decoder
->private_
->residual
[channel
], decoder
->private_
->frame
.header
.blocksize
-order
, subframe
->qlp_coeff
, order
, subframe
->quantization_level
, decoder
->private_
->output
[channel
]+order
);
2718 decoder
->private_
->local_lpc_restore_signal_64bit(decoder
->private_
->residual
[channel
], decoder
->private_
->frame
.header
.blocksize
-order
, subframe
->qlp_coeff
, order
, subframe
->quantization_level
, decoder
->private_
->output
[channel
]+order
);
2724 FLAC__bool
read_subframe_verbatim_(FLAC__StreamDecoder
*decoder
, uint32_t channel
, uint32_t bps
, FLAC__bool do_full_decode
)
2726 FLAC__Subframe_Verbatim
*subframe
= &decoder
->private_
->frame
.subframes
[channel
].data
.verbatim
;
2727 FLAC__int32 x
, *residual
= decoder
->private_
->residual
[channel
];
2730 decoder
->private_
->frame
.subframes
[channel
].type
= FLAC__SUBFRAME_TYPE_VERBATIM
;
2732 subframe
->data
= residual
;
2734 for(i
= 0; i
< decoder
->private_
->frame
.header
.blocksize
; i
++) {
2735 if(!FLAC__bitreader_read_raw_int32(decoder
->private_
->input
, &x
, bps
))
2736 return false; /* read_callback_ sets the state for us */
2740 /* decode the subframe */
2742 memcpy(decoder
->private_
->output
[channel
], subframe
->data
, sizeof(FLAC__int32
) * decoder
->private_
->frame
.header
.blocksize
);
2747 FLAC__bool
read_residual_partitioned_rice_(FLAC__StreamDecoder
*decoder
, uint32_t predictor_order
, uint32_t partition_order
, FLAC__EntropyCodingMethod_PartitionedRiceContents
*partitioned_rice_contents
, FLAC__int32
*residual
, FLAC__bool is_extended
)
2749 FLAC__uint32 rice_parameter
;
2751 uint32_t partition
, sample
, u
;
2752 const uint32_t partitions
= 1u << partition_order
;
2753 const uint32_t partition_samples
= partition_order
> 0? decoder
->private_
->frame
.header
.blocksize
>> partition_order
: decoder
->private_
->frame
.header
.blocksize
- predictor_order
;
2754 const uint32_t plen
= is_extended
? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN
: FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN
;
2755 const uint32_t pesc
= is_extended
? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER
: FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER
;
2757 /* invalid predictor and partition orders mush be handled in the callers */
2758 FLAC__ASSERT(partition_order
> 0? partition_samples
>= predictor_order
: decoder
->private_
->frame
.header
.blocksize
>= predictor_order
);
2760 if(!FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents
, flac_max(6u, partition_order
))) {
2761 decoder
->protected_
->state
= FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR
;
2766 for(partition
= 0; partition
< partitions
; partition
++) {
2767 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &rice_parameter
, plen
))
2768 return false; /* read_callback_ sets the state for us */
2769 partitioned_rice_contents
->parameters
[partition
] = rice_parameter
;
2770 if(rice_parameter
< pesc
) {
2771 partitioned_rice_contents
->raw_bits
[partition
] = 0;
2772 u
= (partition_order
== 0 || partition
> 0)? partition_samples
: partition_samples
- predictor_order
;
2773 if(!FLAC__bitreader_read_rice_signed_block(decoder
->private_
->input
, residual
+ sample
, u
, rice_parameter
))
2774 return false; /* read_callback_ sets the state for us */
2778 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &rice_parameter
, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN
))
2779 return false; /* read_callback_ sets the state for us */
2780 partitioned_rice_contents
->raw_bits
[partition
] = rice_parameter
;
2781 for(u
= (partition_order
== 0 || partition
> 0)? 0 : predictor_order
; u
< partition_samples
; u
++, sample
++) {
2782 if(!FLAC__bitreader_read_raw_int32(decoder
->private_
->input
, &i
, rice_parameter
))
2783 return false; /* read_callback_ sets the state for us */
2784 residual
[sample
] = i
;
2792 FLAC__bool
read_zero_padding_(FLAC__StreamDecoder
*decoder
)
2794 if(!FLAC__bitreader_is_consumed_byte_aligned(decoder
->private_
->input
)) {
2795 FLAC__uint32 zero
= 0;
2796 if(!FLAC__bitreader_read_raw_uint32(decoder
->private_
->input
, &zero
, FLAC__bitreader_bits_left_for_byte_alignment(decoder
->private_
->input
)))
2797 return false; /* read_callback_ sets the state for us */
2799 send_error_to_client_(decoder
, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC
);
2800 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC
;
2806 FLAC__bool
read_callback_(FLAC__byte buffer
[], size_t *bytes
, void *client_data
)
2808 FLAC__StreamDecoder
*decoder
= (FLAC__StreamDecoder
*)client_data
;
2812 /* see [1] HACK NOTE below for why we don't call the eof_callback when decoding Ogg FLAC */
2813 !decoder
->private_
->is_ogg
&&
2815 decoder
->private_
->eof_callback
&& decoder
->private_
->eof_callback(decoder
, decoder
->private_
->client_data
)
2818 decoder
->protected_
->state
= FLAC__STREAM_DECODER_END_OF_STREAM
;
2821 else if(*bytes
> 0) {
2822 /* While seeking, it is possible for our seek to land in the
2823 * middle of audio data that looks exactly like a frame header
2824 * from a future version of an encoder. When that happens, our
2825 * error callback will get an
2826 * FLAC__STREAM_DECODER_UNPARSEABLE_STREAM and increment its
2827 * unparseable_frame_count. But there is a remote possibility
2828 * that it is properly synced at such a "future-codec frame",
2829 * so to make sure, we wait to see many "unparseable" errors in
2830 * a row before bailing out.
2832 if(decoder
->private_
->is_seeking
&& decoder
->private_
->unparseable_frame_count
> 20) {
2833 decoder
->protected_
->state
= FLAC__STREAM_DECODER_ABORTED
;
2837 const FLAC__StreamDecoderReadStatus status
=
2839 decoder
->private_
->is_ogg
?
2840 read_callback_ogg_aspect_(decoder
, buffer
, bytes
) :
2842 decoder
->private_
->read_callback(decoder
, buffer
, bytes
, decoder
->private_
->client_data
)
2844 if(status
== FLAC__STREAM_DECODER_READ_STATUS_ABORT
) {
2845 decoder
->protected_
->state
= FLAC__STREAM_DECODER_ABORTED
;
2848 else if(*bytes
== 0) {
2850 status
== FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM
||
2853 /* see [1] HACK NOTE below for why we don't call the eof_callback when decoding Ogg FLAC */
2854 !decoder
->private_
->is_ogg
&&
2856 decoder
->private_
->eof_callback
&& decoder
->private_
->eof_callback(decoder
, decoder
->private_
->client_data
)
2859 decoder
->protected_
->state
= FLAC__STREAM_DECODER_END_OF_STREAM
;
2870 /* abort to avoid a deadlock */
2871 decoder
->protected_
->state
= FLAC__STREAM_DECODER_ABORTED
;
2874 /* [1] @@@ HACK NOTE: The end-of-stream checking has to be hacked around
2875 * for Ogg FLAC. This is because the ogg decoder aspect can lose sync
2876 * and at the same time hit the end of the stream (for example, seeking
2877 * to a point that is after the beginning of the last Ogg page). There
2878 * is no way to report an Ogg sync loss through the callbacks (see note
2879 * in read_callback_ogg_aspect_()) so it returns CONTINUE with *bytes==0.
2880 * So to keep the decoder from stopping at this point we gate the call
2881 * to the eof_callback and let the Ogg decoder aspect set the
2882 * end-of-stream state when it is needed.
2887 FLAC__StreamDecoderReadStatus
read_callback_ogg_aspect_(const FLAC__StreamDecoder
*decoder
, FLAC__byte buffer
[], size_t *bytes
)
2889 switch(FLAC__ogg_decoder_aspect_read_callback_wrapper(&decoder
->protected_
->ogg_decoder_aspect
, buffer
, bytes
, read_callback_proxy_
, decoder
, decoder
->private_
->client_data
)) {
2890 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK
:
2891 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE
;
2892 /* we don't really have a way to handle lost sync via read
2893 * callback so we'll let it pass and let the underlying
2894 * FLAC decoder catch the error
2896 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_LOST_SYNC
:
2897 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE
;
2898 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM
:
2899 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM
;
2900 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_NOT_FLAC
:
2901 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_UNSUPPORTED_MAPPING_VERSION
:
2902 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT
:
2903 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_ERROR
:
2904 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_MEMORY_ALLOCATION_ERROR
:
2905 return FLAC__STREAM_DECODER_READ_STATUS_ABORT
;
2908 /* double protection */
2909 return FLAC__STREAM_DECODER_READ_STATUS_ABORT
;
2913 FLAC__OggDecoderAspectReadStatus
read_callback_proxy_(const void *void_decoder
, FLAC__byte buffer
[], size_t *bytes
, void *client_data
)
2915 FLAC__StreamDecoder
*decoder
= (FLAC__StreamDecoder
*)void_decoder
;
2917 switch(decoder
->private_
->read_callback(decoder
, buffer
, bytes
, client_data
)) {
2918 case FLAC__STREAM_DECODER_READ_STATUS_CONTINUE
:
2919 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK
;
2920 case FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM
:
2921 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM
;
2922 case FLAC__STREAM_DECODER_READ_STATUS_ABORT
:
2923 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT
;
2925 /* double protection: */
2927 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT
;
2932 FLAC__StreamDecoderWriteStatus
write_audio_frame_to_client_(FLAC__StreamDecoder
*decoder
, const FLAC__Frame
*frame
, const FLAC__int32
* const buffer
[])
2934 if(decoder
->private_
->is_seeking
) {
2935 FLAC__uint64 this_frame_sample
= frame
->header
.number
.sample_number
;
2936 FLAC__uint64 next_frame_sample
= this_frame_sample
+ (FLAC__uint64
)frame
->header
.blocksize
;
2937 FLAC__uint64 target_sample
= decoder
->private_
->target_sample
;
2939 FLAC__ASSERT(frame
->header
.number_type
== FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER
);
2942 decoder
->private_
->got_a_frame
= true;
2944 decoder
->private_
->last_frame
= *frame
; /* save the frame */
2945 if(this_frame_sample
<= target_sample
&& target_sample
< next_frame_sample
) { /* we hit our target frame */
2946 uint32_t delta
= (uint32_t)(target_sample
- this_frame_sample
);
2947 /* kick out of seek mode */
2948 decoder
->private_
->is_seeking
= false;
2949 /* shift out the samples before target_sample */
2952 const FLAC__int32
*newbuffer
[FLAC__MAX_CHANNELS
];
2953 for(channel
= 0; channel
< frame
->header
.channels
; channel
++)
2954 newbuffer
[channel
] = buffer
[channel
] + delta
;
2955 decoder
->private_
->last_frame
.header
.blocksize
-= delta
;
2956 decoder
->private_
->last_frame
.header
.number
.sample_number
+= (FLAC__uint64
)delta
;
2957 /* write the relevant samples */
2958 return decoder
->private_
->write_callback(decoder
, &decoder
->private_
->last_frame
, newbuffer
, decoder
->private_
->client_data
);
2961 /* write the relevant samples */
2962 return decoder
->private_
->write_callback(decoder
, frame
, buffer
, decoder
->private_
->client_data
);
2966 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE
;
2971 * If we never got STREAMINFO, turn off MD5 checking to save
2972 * cycles since we don't have a sum to compare to anyway
2974 if(!decoder
->private_
->has_stream_info
)
2975 decoder
->private_
->do_md5_checking
= false;
2976 if(decoder
->private_
->do_md5_checking
) {
2977 if(!FLAC__MD5Accumulate(&decoder
->private_
->md5context
, buffer
, frame
->header
.channels
, frame
->header
.blocksize
, (frame
->header
.bits_per_sample
+7) / 8))
2978 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT
;
2980 return decoder
->private_
->write_callback(decoder
, frame
, buffer
, decoder
->private_
->client_data
);
2984 void send_error_to_client_(const FLAC__StreamDecoder
*decoder
, FLAC__StreamDecoderErrorStatus status
)
2986 if(!decoder
->private_
->is_seeking
)
2987 decoder
->private_
->error_callback(decoder
, status
, decoder
->private_
->client_data
);
2988 else if(status
== FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM
)
2989 decoder
->private_
->unparseable_frame_count
++;
2992 FLAC__bool
seek_to_absolute_sample_(FLAC__StreamDecoder
*decoder
, FLAC__uint64 stream_length
, FLAC__uint64 target_sample
)
2994 FLAC__uint64 first_frame_offset
= decoder
->private_
->first_frame_offset
, lower_bound
, upper_bound
, lower_bound_sample
, upper_bound_sample
, this_frame_sample
;
2995 FLAC__int64 pos
= -1;
2997 uint32_t approx_bytes_per_frame
;
2998 FLAC__bool first_seek
= true;
2999 const FLAC__uint64 total_samples
= FLAC__stream_decoder_get_total_samples(decoder
);
3000 const uint32_t min_blocksize
= decoder
->private_
->stream_info
.data
.stream_info
.min_blocksize
;
3001 const uint32_t max_blocksize
= decoder
->private_
->stream_info
.data
.stream_info
.max_blocksize
;
3002 const uint32_t max_framesize
= decoder
->private_
->stream_info
.data
.stream_info
.max_framesize
;
3003 const uint32_t min_framesize
= decoder
->private_
->stream_info
.data
.stream_info
.min_framesize
;
3004 /* take these from the current frame in case they've changed mid-stream */
3005 uint32_t channels
= FLAC__stream_decoder_get_channels(decoder
);
3006 uint32_t bps
= FLAC__stream_decoder_get_bits_per_sample(decoder
);
3007 const FLAC__StreamMetadata_SeekTable
*seek_table
= decoder
->private_
->has_seek_table
? &decoder
->private_
->seek_table
.data
.seek_table
: 0;
3009 /* use values from stream info if we didn't decode a frame */
3011 channels
= decoder
->private_
->stream_info
.data
.stream_info
.channels
;
3013 bps
= decoder
->private_
->stream_info
.data
.stream_info
.bits_per_sample
;
3015 /* we are just guessing here */
3016 if(max_framesize
> 0)
3017 approx_bytes_per_frame
= (max_framesize
+ min_framesize
) / 2 + 1;
3019 * Check if it's a known fixed-blocksize stream. Note that though
3020 * the spec doesn't allow zeroes in the STREAMINFO block, we may
3021 * never get a STREAMINFO block when decoding so the value of
3022 * min_blocksize might be zero.
3024 else if(min_blocksize
== max_blocksize
&& min_blocksize
> 0) {
3025 /* note there are no () around 'bps/8' to keep precision up since it's an integer calculation */
3026 approx_bytes_per_frame
= min_blocksize
* channels
* bps
/8 + 64;
3029 approx_bytes_per_frame
= 4096 * channels
* bps
/8 + 64;
3032 * First, we set an upper and lower bound on where in the
3033 * stream we will search. For now we assume the worst case
3034 * scenario, which is our best guess at the beginning of
3035 * the first frame and end of the stream.
3037 lower_bound
= first_frame_offset
;
3038 lower_bound_sample
= 0;
3039 upper_bound
= stream_length
;
3040 upper_bound_sample
= total_samples
> 0 ? total_samples
: target_sample
/*estimate it*/;
3043 * Now we refine the bounds if we have a seektable with
3044 * suitable points. Note that according to the spec they
3045 * must be ordered by ascending sample number.
3047 * Note: to protect against invalid seek tables we will ignore points
3048 * that have frame_samples==0 or sample_number>=total_samples
3051 FLAC__uint64 new_lower_bound
= lower_bound
;
3052 FLAC__uint64 new_upper_bound
= upper_bound
;
3053 FLAC__uint64 new_lower_bound_sample
= lower_bound_sample
;
3054 FLAC__uint64 new_upper_bound_sample
= upper_bound_sample
;
3056 /* find the closest seek point <= target_sample, if it exists */
3057 for(i
= (int)seek_table
->num_points
- 1; i
>= 0; i
--) {
3059 seek_table
->points
[i
].sample_number
!= FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER
&&
3060 seek_table
->points
[i
].frame_samples
> 0 && /* defense against bad seekpoints */
3061 (total_samples
<= 0 || seek_table
->points
[i
].sample_number
< total_samples
) && /* defense against bad seekpoints */
3062 seek_table
->points
[i
].sample_number
<= target_sample
3066 if(i
>= 0) { /* i.e. we found a suitable seek point... */
3067 new_lower_bound
= first_frame_offset
+ seek_table
->points
[i
].stream_offset
;
3068 new_lower_bound_sample
= seek_table
->points
[i
].sample_number
;
3071 /* find the closest seek point > target_sample, if it exists */
3072 for(i
= 0; i
< (int)seek_table
->num_points
; i
++) {
3074 seek_table
->points
[i
].sample_number
!= FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER
&&
3075 seek_table
->points
[i
].frame_samples
> 0 && /* defense against bad seekpoints */
3076 (total_samples
<= 0 || seek_table
->points
[i
].sample_number
< total_samples
) && /* defense against bad seekpoints */
3077 seek_table
->points
[i
].sample_number
> target_sample
3081 if(i
< (int)seek_table
->num_points
) { /* i.e. we found a suitable seek point... */
3082 new_upper_bound
= first_frame_offset
+ seek_table
->points
[i
].stream_offset
;
3083 new_upper_bound_sample
= seek_table
->points
[i
].sample_number
;
3085 /* final protection against unsorted seek tables; keep original values if bogus */
3086 if(new_upper_bound
>= new_lower_bound
) {
3087 lower_bound
= new_lower_bound
;
3088 upper_bound
= new_upper_bound
;
3089 lower_bound_sample
= new_lower_bound_sample
;
3090 upper_bound_sample
= new_upper_bound_sample
;
3094 FLAC__ASSERT(upper_bound_sample
>= lower_bound_sample
);
3095 /* there are 2 insidious ways that the following equality occurs, which
3097 * 1) total_samples is 0 (unknown) and target_sample is 0
3098 * 2) total_samples is 0 (unknown) and target_sample happens to be
3099 * exactly equal to the last seek point in the seek table; this
3100 * means there is no seek point above it, and upper_bound_samples
3101 * remains equal to the estimate (of target_samples) we made above
3102 * in either case it does not hurt to move upper_bound_sample up by 1
3104 if(upper_bound_sample
== lower_bound_sample
)
3105 upper_bound_sample
++;
3107 decoder
->private_
->target_sample
= target_sample
;
3109 /* check if the bounds are still ok */
3110 if (lower_bound_sample
>= upper_bound_sample
|| lower_bound
> upper_bound
) {
3111 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3114 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3115 pos
= (FLAC__int64
)lower_bound
+ (FLAC__int64
)((double)(target_sample
- lower_bound_sample
) / (double)(upper_bound_sample
- lower_bound_sample
) * (double)(upper_bound
- lower_bound
)) - approx_bytes_per_frame
;
3117 /* a little less accurate: */
3118 if(upper_bound
- lower_bound
< 0xffffffff)
3119 pos
= (FLAC__int64
)lower_bound
+ (FLAC__int64
)(((target_sample
- lower_bound_sample
) * (upper_bound
- lower_bound
)) / (upper_bound_sample
- lower_bound_sample
)) - approx_bytes_per_frame
;
3120 else /* @@@ WATCHOUT, ~2TB limit */
3121 pos
= (FLAC__int64
)lower_bound
+ (FLAC__int64
)((((target_sample
- lower_bound_sample
)>>8) * ((upper_bound
- lower_bound
)>>8)) / ((upper_bound_sample
- lower_bound_sample
)>>16)) - approx_bytes_per_frame
;
3123 if(pos
>= (FLAC__int64
)upper_bound
)
3124 pos
= (FLAC__int64
)upper_bound
- 1;
3125 if(pos
< (FLAC__int64
)lower_bound
)
3126 pos
= (FLAC__int64
)lower_bound
;
3127 if(decoder
->private_
->seek_callback(decoder
, (FLAC__uint64
)pos
, decoder
->private_
->client_data
) != FLAC__STREAM_DECODER_SEEK_STATUS_OK
) {
3128 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3131 if(!FLAC__stream_decoder_flush(decoder
)) {
3132 /* above call sets the state for us */
3135 /* Now we need to get a frame. First we need to reset our
3136 * unparseable_frame_count; if we get too many unparseable
3137 * frames in a row, the read callback will return
3138 * FLAC__STREAM_DECODER_READ_STATUS_ABORT, causing
3139 * FLAC__stream_decoder_process_single() to return false.
3141 decoder
->private_
->unparseable_frame_count
= 0;
3142 if(!FLAC__stream_decoder_process_single(decoder
) ||
3143 decoder
->protected_
->state
== FLAC__STREAM_DECODER_ABORTED
) {
3144 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3147 /* our write callback will change the state when it gets to the target frame */
3148 /* actually, we could have got_a_frame if our decoder is at FLAC__STREAM_DECODER_END_OF_STREAM so we need to check for that also */
3150 /*@@@@@@ used to be the following; not clear if the check for end of stream is needed anymore */
3151 if(decoder
->protected_
->state
!= FLAC__SEEKABLE_STREAM_DECODER_SEEKING
&& decoder
->protected_
->state
!= FLAC__STREAM_DECODER_END_OF_STREAM
)
3154 if(!decoder
->private_
->is_seeking
)
3157 FLAC__ASSERT(decoder
->private_
->last_frame
.header
.number_type
== FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER
);
3158 this_frame_sample
= decoder
->private_
->last_frame
.header
.number
.sample_number
;
3160 if (0 == decoder
->private_
->samples_decoded
|| (this_frame_sample
+ decoder
->private_
->last_frame
.header
.blocksize
>= upper_bound_sample
&& !first_seek
)) {
3161 if (pos
== (FLAC__int64
)lower_bound
) {
3162 /* can't move back any more than the first frame, something is fatally wrong */
3163 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3166 /* our last move backwards wasn't big enough, try again */
3167 approx_bytes_per_frame
= approx_bytes_per_frame
? approx_bytes_per_frame
* 2 : 16;
3170 /* allow one seek over upper bound, so we can get a correct upper_bound_sample for streams with unknown total_samples */
3173 /* make sure we are not seeking in corrupted stream */
3174 if (this_frame_sample
< lower_bound_sample
) {
3175 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3179 /* we need to narrow the search */
3180 if(target_sample
< this_frame_sample
) {
3181 upper_bound_sample
= this_frame_sample
+ decoder
->private_
->last_frame
.header
.blocksize
;
3182 /*@@@@@@ what will decode position be if at end of stream? */
3183 if(!FLAC__stream_decoder_get_decode_position(decoder
, &upper_bound
)) {
3184 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3187 approx_bytes_per_frame
= (uint32_t)(2 * (upper_bound
- pos
) / 3 + 16);
3189 else { /* target_sample >= this_frame_sample + this frame's blocksize */
3190 lower_bound_sample
= this_frame_sample
+ decoder
->private_
->last_frame
.header
.blocksize
;
3191 if(!FLAC__stream_decoder_get_decode_position(decoder
, &lower_bound
)) {
3192 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3195 approx_bytes_per_frame
= (uint32_t)(2 * (lower_bound
- pos
) / 3 + 16);
3203 FLAC__bool
seek_to_absolute_sample_ogg_(FLAC__StreamDecoder
*decoder
, FLAC__uint64 stream_length
, FLAC__uint64 target_sample
)
3205 FLAC__uint64 left_pos
= 0, right_pos
= stream_length
;
3206 FLAC__uint64 left_sample
= 0, right_sample
= FLAC__stream_decoder_get_total_samples(decoder
);
3207 FLAC__uint64 this_frame_sample
= (FLAC__uint64
)0 - 1;
3208 FLAC__uint64 pos
= 0; /* only initialized to avoid compiler warning */
3209 FLAC__bool did_a_seek
;
3210 uint32_t iteration
= 0;
3212 /* In the first iterations, we will calculate the target byte position
3213 * by the distance from the target sample to left_sample and
3214 * right_sample (let's call it "proportional search"). After that, we
3215 * will switch to binary search.
3217 uint32_t BINARY_SEARCH_AFTER_ITERATION
= 2;
3219 /* We will switch to a linear search once our current sample is less
3220 * than this number of samples ahead of the target sample
3222 static const FLAC__uint64 LINEAR_SEARCH_WITHIN_SAMPLES
= FLAC__MAX_BLOCK_SIZE
* 2;
3224 /* If the total number of samples is unknown, use a large value, and
3225 * force binary search immediately.
3227 if(right_sample
== 0) {
3228 right_sample
= (FLAC__uint64
)(-1);
3229 BINARY_SEARCH_AFTER_ITERATION
= 0;
3232 decoder
->private_
->target_sample
= target_sample
;
3233 for( ; ; iteration
++) {
3234 if (iteration
== 0 || this_frame_sample
> target_sample
|| target_sample
- this_frame_sample
> LINEAR_SEARCH_WITHIN_SAMPLES
) {
3235 if (iteration
>= BINARY_SEARCH_AFTER_ITERATION
) {
3236 pos
= (right_pos
+ left_pos
) / 2;
3239 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3240 pos
= (FLAC__uint64
)((double)(target_sample
- left_sample
) / (double)(right_sample
- left_sample
) * (double)(right_pos
- left_pos
));
3242 /* a little less accurate: */
3243 if ((target_sample
-left_sample
<= 0xffffffff) && (right_pos
-left_pos
<= 0xffffffff))
3244 pos
= (FLAC__int64
)(((target_sample
-left_sample
) * (right_pos
-left_pos
)) / (right_sample
-left_sample
));
3245 else /* @@@ WATCHOUT, ~2TB limit */
3246 pos
= (FLAC__int64
)((((target_sample
-left_sample
)>>8) * ((right_pos
-left_pos
)>>8)) / ((right_sample
-left_sample
)>>16));
3248 /* @@@ TODO: might want to limit pos to some distance
3249 * before EOF, to make sure we land before the last frame,
3250 * thereby getting a this_frame_sample and so having a better
3256 if(decoder
->private_
->seek_callback((FLAC__StreamDecoder
*)decoder
, (FLAC__uint64
)pos
, decoder
->private_
->client_data
) != FLAC__STREAM_DECODER_SEEK_STATUS_OK
) {
3257 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3260 if(!FLAC__stream_decoder_flush(decoder
)) {
3261 /* above call sets the state for us */
3269 decoder
->private_
->got_a_frame
= false;
3270 if(!FLAC__stream_decoder_process_single(decoder
) ||
3271 decoder
->protected_
->state
== FLAC__STREAM_DECODER_ABORTED
) {
3272 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3275 if(!decoder
->private_
->got_a_frame
) {
3277 /* this can happen if we seek to a point after the last frame; we drop
3278 * to binary search right away in this case to avoid any wasted
3279 * iterations of proportional search.
3282 BINARY_SEARCH_AFTER_ITERATION
= 0;
3285 /* this can probably only happen if total_samples is unknown and the
3286 * target_sample is past the end of the stream
3288 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3292 /* our write callback will change the state when it gets to the target frame */
3293 else if(!decoder
->private_
->is_seeking
) {
3297 this_frame_sample
= decoder
->private_
->last_frame
.header
.number
.sample_number
;
3298 FLAC__ASSERT(decoder
->private_
->last_frame
.header
.number_type
== FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER
);
3301 if (this_frame_sample
<= target_sample
) {
3302 /* The 'equal' case should not happen, since
3303 * FLAC__stream_decoder_process_single()
3304 * should recognize that it has hit the
3305 * target sample and we would exit through
3306 * the 'break' above.
3308 FLAC__ASSERT(this_frame_sample
!= target_sample
);
3310 left_sample
= this_frame_sample
;
3311 /* sanity check to avoid infinite loop */
3312 if (left_pos
== pos
) {
3313 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3318 else if(this_frame_sample
> target_sample
) {
3319 right_sample
= this_frame_sample
;
3320 /* sanity check to avoid infinite loop */
3321 if (right_pos
== pos
) {
3322 decoder
->protected_
->state
= FLAC__STREAM_DECODER_SEEK_ERROR
;
3335 FLAC__StreamDecoderReadStatus
file_read_callback_(const FLAC__StreamDecoder
*decoder
, FLAC__byte buffer
[], size_t *bytes
, void *client_data
)
3340 *bytes
= fread(buffer
, sizeof(FLAC__byte
), *bytes
, decoder
->private_
->file
);
3341 if(ferror(decoder
->private_
->file
))
3342 return FLAC__STREAM_DECODER_READ_STATUS_ABORT
;
3343 else if(*bytes
== 0)
3344 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM
;
3346 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE
;
3349 return FLAC__STREAM_DECODER_READ_STATUS_ABORT
; /* abort to avoid a deadlock */
3352 FLAC__StreamDecoderSeekStatus
file_seek_callback_(const FLAC__StreamDecoder
*decoder
, FLAC__uint64 absolute_byte_offset
, void *client_data
)
3356 if(decoder
->private_
->file
== stdin
)
3357 return FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED
;
3358 else if(fseeko(decoder
->private_
->file
, (FLAC__off_t
)absolute_byte_offset
, SEEK_SET
) < 0)
3359 return FLAC__STREAM_DECODER_SEEK_STATUS_ERROR
;
3361 return FLAC__STREAM_DECODER_SEEK_STATUS_OK
;
3364 FLAC__StreamDecoderTellStatus
file_tell_callback_(const FLAC__StreamDecoder
*decoder
, FLAC__uint64
*absolute_byte_offset
, void *client_data
)
3369 if(decoder
->private_
->file
== stdin
)
3370 return FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED
;
3371 else if((pos
= ftello(decoder
->private_
->file
)) < 0)
3372 return FLAC__STREAM_DECODER_TELL_STATUS_ERROR
;
3374 *absolute_byte_offset
= (FLAC__uint64
)pos
;
3375 return FLAC__STREAM_DECODER_TELL_STATUS_OK
;
3379 FLAC__StreamDecoderLengthStatus
file_length_callback_(const FLAC__StreamDecoder
*decoder
, FLAC__uint64
*stream_length
, void *client_data
)
3381 struct flac_stat_s filestats
;
3384 if(decoder
->private_
->file
== stdin
)
3385 return FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED
;
3386 else if(flac_fstat(fileno(decoder
->private_
->file
), &filestats
) != 0)
3387 return FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR
;
3389 *stream_length
= (FLAC__uint64
)filestats
.st_size
;
3390 return FLAC__STREAM_DECODER_LENGTH_STATUS_OK
;
3394 FLAC__bool
file_eof_callback_(const FLAC__StreamDecoder
*decoder
, void *client_data
)
3398 return feof(decoder
->private_
->file
)? true : false;
3401 FLAC_API
const void *FLAC__get_decoder_client_data(FLAC__StreamDecoder
*decoder
)
3403 return decoder
->private_
->client_data
;