2 * This file is part of MPlayer.
4 * MPlayer is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * MPlayer is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
27 #include "stream/stream.h"
28 #include "libmpdemux/demuxer.h"
30 #include "codec-cfg.h"
31 #include "libmpdemux/stheader.h"
33 #include "dec_audio.h"
35 #include "libaf/af_format.h"
39 #ifdef CONFIG_DYNAMIC_PLUGINS
43 #ifdef CONFIG_FAKE_MONO
47 af_cfg_t af_cfg
= { 1, NULL
}; // Configuration for audio filters
52 mp_tmsg(MSGT_DECAUDIO
, MSGL_INFO
, "Available (compiled-in) audio codec families/drivers:\n");
53 mp_msg(MSGT_IDENTIFY
, MSGL_INFO
, "ID_AUDIO_DRIVERS\n");
54 mp_msg(MSGT_DECAUDIO
, MSGL_INFO
, " afm: info: (comment)\n");
55 for (i
= 0; mpcodecs_ad_drivers
[i
] != NULL
; i
++)
56 if (mpcodecs_ad_drivers
[i
]->info
->comment
57 && mpcodecs_ad_drivers
[i
]->info
->comment
[0])
58 mp_msg(MSGT_DECAUDIO
, MSGL_INFO
, "%9s %s (%s)\n",
59 mpcodecs_ad_drivers
[i
]->info
->short_name
,
60 mpcodecs_ad_drivers
[i
]->info
->name
,
61 mpcodecs_ad_drivers
[i
]->info
->comment
);
63 mp_msg(MSGT_DECAUDIO
, MSGL_INFO
, "%9s %s\n",
64 mpcodecs_ad_drivers
[i
]->info
->short_name
,
65 mpcodecs_ad_drivers
[i
]->info
->name
);
68 static int init_audio_codec(sh_audio_t
*sh_audio
)
70 assert(!sh_audio
->initialized
);
71 resync_audio_stream(sh_audio
);
72 if ((af_cfg
.force
& AF_INIT_FORMAT_MASK
) == AF_INIT_FLOAT
) {
73 int fmt
= AF_FORMAT_FLOAT_NE
;
74 if (sh_audio
->ad_driver
->control(sh_audio
, ADCTRL_QUERY_FORMAT
,
75 &fmt
) == CONTROL_TRUE
) {
76 sh_audio
->sample_format
= fmt
;
77 sh_audio
->samplesize
= 4;
80 sh_audio
->audio_out_minsize
= 8192; // default, preinit() may change it
81 if (!sh_audio
->ad_driver
->preinit(sh_audio
)) {
82 mp_tmsg(MSGT_DECAUDIO
, MSGL_ERR
, "ADecoder preinit failed :(\n");
86 /* allocate audio in buffer: */
87 if (sh_audio
->audio_in_minsize
> 0) {
88 sh_audio
->a_in_buffer_size
= sh_audio
->audio_in_minsize
;
89 mp_tmsg(MSGT_DECAUDIO
, MSGL_V
, "dec_audio: Allocating %d bytes for input buffer.\n",
90 sh_audio
->a_in_buffer_size
);
91 sh_audio
->a_in_buffer
= av_mallocz(sh_audio
->a_in_buffer_size
);
94 const int base_size
= 65536;
95 // At least 64 KiB plus rounding up to next decodable unit size
96 sh_audio
->a_buffer_size
= base_size
+ sh_audio
->audio_out_minsize
;
98 mp_tmsg(MSGT_DECAUDIO
, MSGL_V
, "dec_audio: Allocating %d + %d = %d bytes for output buffer.\n",
99 sh_audio
->audio_out_minsize
, base_size
, sh_audio
->a_buffer_size
);
101 sh_audio
->a_buffer
= av_mallocz(sh_audio
->a_buffer_size
);
102 if (!sh_audio
->a_buffer
) {
103 mp_tmsg(MSGT_DECAUDIO
, MSGL_ERR
, "Cannot allocate audio out buffer.\n");
106 sh_audio
->a_buffer_len
= 0;
108 if (!sh_audio
->ad_driver
->init(sh_audio
)) {
109 mp_tmsg(MSGT_DECAUDIO
, MSGL_WARN
, "ADecoder init failed :(\n");
110 uninit_audio(sh_audio
); // free buffers
114 sh_audio
->initialized
= 1;
116 if (!sh_audio
->channels
|| !sh_audio
->samplerate
) {
117 mp_tmsg(MSGT_DECAUDIO
, MSGL_WARN
, "Unknown/missing audio format -> no sound\n");
118 uninit_audio(sh_audio
); // free buffers
122 if (!sh_audio
->o_bps
)
123 sh_audio
->o_bps
= sh_audio
->channels
* sh_audio
->samplerate
124 * sh_audio
->samplesize
;
126 mp_msg(MSGT_DECAUDIO
, MSGL_INFO
,
127 "AUDIO: %d Hz, %d ch, %s, %3.1f kbit/%3.2f%% (ratio: %d->%d)\n",
128 sh_audio
->samplerate
, sh_audio
->channels
,
129 af_fmt2str_short(sh_audio
->sample_format
),
130 sh_audio
->i_bps
* 8 * 0.001,
131 ((float) sh_audio
->i_bps
/ sh_audio
->o_bps
) * 100.0,
132 sh_audio
->i_bps
, sh_audio
->o_bps
);
133 mp_msg(MSGT_IDENTIFY
, MSGL_INFO
,
134 "ID_AUDIO_BITRATE=%d\nID_AUDIO_RATE=%d\n" "ID_AUDIO_NCH=%d\n",
135 sh_audio
->i_bps
* 8, sh_audio
->samplerate
, sh_audio
->channels
);
137 sh_audio
->a_out_buffer_size
= 0;
138 sh_audio
->a_out_buffer
= NULL
;
139 sh_audio
->a_out_buffer_len
= 0;
144 static int init_audio(sh_audio_t
*sh_audio
, char *codecname
, char *afm
,
145 int status
, stringset_t
*selected
)
147 unsigned int orig_fourcc
= sh_audio
->wf
? sh_audio
->wf
->wFormatTag
: 0;
149 if (codecname
&& codecname
[0] == '+') {
150 codecname
= &codecname
[1];
153 sh_audio
->codec
= NULL
;
155 const ad_functions_t
*mpadec
;
157 sh_audio
->ad_driver
= 0;
158 // restore original fourcc:
160 sh_audio
->wf
->wFormatTag
= i
= orig_fourcc
;
161 if (!(sh_audio
->codec
= find_audio_codec(sh_audio
->format
,
162 sh_audio
->wf
? (&i
) : NULL
,
163 sh_audio
->codec
, force
)))
166 sh_audio
->wf
->wFormatTag
= i
;
167 // ok we found one codec
168 if (stringset_test(selected
, sh_audio
->codec
->name
))
169 continue; // already tried & failed
170 if (codecname
&& strcmp(sh_audio
->codec
->name
, codecname
))
172 if (afm
&& strcmp(sh_audio
->codec
->drv
, afm
))
173 continue; // afm doesn't match
174 if (!force
&& sh_audio
->codec
->status
< status
)
175 continue; // too unstable
176 stringset_add(selected
, sh_audio
->codec
->name
); // tagging it
177 // ok, it matches all rules, let's find the driver!
178 for (i
= 0; mpcodecs_ad_drivers
[i
] != NULL
; i
++)
179 if (!strcmp(mpcodecs_ad_drivers
[i
]->info
->short_name
,
180 sh_audio
->codec
->drv
))
182 mpadec
= mpcodecs_ad_drivers
[i
];
183 #ifdef CONFIG_DYNAMIC_PLUGINS
185 /* try to open shared decoder plugin */
188 ad_functions_t
*funcs_sym
;
192 strlen(MPLAYER_LIBDIR
) + strlen(sh_audio
->codec
->drv
) + 16;
193 buf
= malloc(buf_len
);
196 snprintf(buf
, buf_len
, "%s/mplayer/ad_%s.so", MPLAYER_LIBDIR
,
197 sh_audio
->codec
->drv
);
198 mp_msg(MSGT_DECAUDIO
, MSGL_DBG2
,
199 "Trying to open external plugin: %s\n", buf
);
200 sh_audio
->dec_handle
= dlopen(buf
, RTLD_LAZY
);
201 if (!sh_audio
->dec_handle
)
203 snprintf(buf
, buf_len
, "mpcodecs_ad_%s", sh_audio
->codec
->drv
);
204 funcs_sym
= dlsym(sh_audio
->dec_handle
, buf
);
205 if (!funcs_sym
|| !funcs_sym
->info
|| !funcs_sym
->preinit
206 || !funcs_sym
->init
|| !funcs_sym
->uninit
207 || !funcs_sym
->control
|| !funcs_sym
->decode_audio
)
209 info_sym
= funcs_sym
->info
;
210 if (strcmp(info_sym
->short_name
, sh_audio
->codec
->drv
))
214 mp_msg(MSGT_DECAUDIO
, MSGL_V
,
215 "Using external decoder plugin (%s/mplayer/ad_%s.so)!\n",
216 MPLAYER_LIBDIR
, sh_audio
->codec
->drv
);
219 if (!mpadec
) { // driver not available (==compiled in)
220 mp_tmsg(MSGT_DECAUDIO
, MSGL_ERR
,
221 "Requested audio codec family [%s] (afm=%s) not available.\nEnable it at compilation.\n",
222 sh_audio
->codec
->name
, sh_audio
->codec
->drv
);
225 // it's available, let's try to init!
227 mp_tmsg(MSGT_DECAUDIO
, MSGL_INFO
, "Opening audio decoder: [%s] %s\n",
228 mpadec
->info
->short_name
, mpadec
->info
->name
);
229 sh_audio
->ad_driver
= mpadec
;
230 if (!init_audio_codec(sh_audio
)) {
231 mp_tmsg(MSGT_DECAUDIO
, MSGL_WARN
,
232 "Could not open audio decoder %s.\n",
233 mpadec
->info
->short_name
);
234 continue; // try next...
242 int init_best_audio_codec(sh_audio_t
*sh_audio
, char **audio_codec_list
,
243 char **audio_fm_list
)
245 stringset_t selected
;
246 char *ac_l_default
[2] = { "", (char *) NULL
};
248 if (!audio_codec_list
)
249 audio_codec_list
= ac_l_default
;
250 // Go through the codec.conf and find the best codec...
251 sh_audio
->initialized
= 0;
252 stringset_init(&selected
);
253 while (!sh_audio
->initialized
&& *audio_codec_list
) {
254 char *audio_codec
= *(audio_codec_list
++);
255 if (audio_codec
[0]) {
256 if (audio_codec
[0] == '-') {
257 // disable this codec:
258 stringset_add(&selected
, audio_codec
+ 1);
260 // forced codec by name:
261 mp_tmsg(MSGT_DECAUDIO
, MSGL_INFO
, "Forced audio codec: %s\n",
263 init_audio(sh_audio
, audio_codec
, NULL
, -1, &selected
);
267 // try in stability order: UNTESTED, WORKING, BUGGY.
268 // never try CRASHING.
270 char **fmlist
= audio_fm_list
;
271 // try first the preferred codec families:
272 while (!sh_audio
->initialized
&& *fmlist
) {
273 char *audio_fm
= *(fmlist
++);
274 mp_tmsg(MSGT_DECAUDIO
, MSGL_INFO
, "Trying to force audio codec driver family %s...\n",
276 for (status
= CODECS_STATUS__MAX
;
277 status
>= CODECS_STATUS__MIN
; --status
)
278 if (init_audio(sh_audio
, NULL
, audio_fm
, status
, &selected
))
282 if (!sh_audio
->initialized
)
283 for (status
= CODECS_STATUS__MAX
; status
>= CODECS_STATUS__MIN
;
285 if (init_audio(sh_audio
, NULL
, NULL
, status
, &selected
))
289 stringset_free(&selected
);
291 if (!sh_audio
->initialized
) {
292 mp_tmsg(MSGT_DECAUDIO
, MSGL_ERR
, "Cannot find codec for audio format 0x%X.\n",
297 mp_tmsg(MSGT_DECAUDIO
, MSGL_INFO
, "Selected audio codec: [%s] afm: %s (%s)\n",
298 sh_audio
->codec
->name
, sh_audio
->codec
->drv
, sh_audio
->codec
->info
);
302 void uninit_audio(sh_audio_t
*sh_audio
)
304 if (sh_audio
->afilter
) {
305 mp_msg(MSGT_DECAUDIO
, MSGL_V
, "Uninit audio filters...\n");
306 af_uninit(sh_audio
->afilter
);
307 free(sh_audio
->afilter
);
308 sh_audio
->afilter
= NULL
;
310 if (sh_audio
->initialized
) {
311 mp_tmsg(MSGT_DECAUDIO
, MSGL_V
, "Uninit audio: %s\n",
312 sh_audio
->codec
->drv
);
313 sh_audio
->ad_driver
->uninit(sh_audio
);
314 #ifdef CONFIG_DYNAMIC_PLUGINS
315 if (sh_audio
->dec_handle
)
316 dlclose(sh_audio
->dec_handle
);
318 sh_audio
->initialized
= 0;
320 free(sh_audio
->a_out_buffer
);
321 sh_audio
->a_out_buffer
= NULL
;
322 sh_audio
->a_out_buffer_size
= 0;
323 av_freep(&sh_audio
->a_buffer
);
324 av_freep(&sh_audio
->a_in_buffer
);
328 int init_audio_filters(sh_audio_t
*sh_audio
, int in_samplerate
,
329 int *out_samplerate
, int *out_channels
, int *out_format
)
331 af_stream_t
*afs
= sh_audio
->afilter
;
333 afs
= calloc(1, sizeof(struct af_stream
));
334 afs
->opts
= sh_audio
->opts
;
336 // input format: same as codec's output format:
337 afs
->input
.rate
= in_samplerate
;
338 afs
->input
.nch
= sh_audio
->channels
;
339 afs
->input
.format
= sh_audio
->sample_format
;
340 af_fix_parameters(&(afs
->input
));
342 // output format: same as ao driver's input format (if missing, fallback to input)
343 afs
->output
.rate
= *out_samplerate
;
344 afs
->output
.nch
= *out_channels
;
345 afs
->output
.format
= *out_format
;
346 af_fix_parameters(&(afs
->output
));
349 memcpy(&afs
->cfg
, &af_cfg
, sizeof(af_cfg_t
));
351 mp_tmsg(MSGT_DECAUDIO
, MSGL_V
, "Building audio filter chain for %dHz/%dch/%s -> %dHz/%dch/%s...\n",
352 afs
->input
.rate
, afs
->input
.nch
,
353 af_fmt2str_short(afs
->input
.format
), afs
->output
.rate
,
354 afs
->output
.nch
, af_fmt2str_short(afs
->output
.format
));
356 // let's autoprobe it!
357 if (0 != af_init(afs
)) {
358 sh_audio
->afilter
= NULL
;
360 return 0; // failed :(
363 *out_samplerate
= afs
->output
.rate
;
364 *out_channels
= afs
->output
.nch
;
365 *out_format
= afs
->output
.format
;
367 sh_audio
->a_out_buffer_len
= 0;
370 sh_audio
->afilter
= (void *) afs
;
374 static void set_min_out_buffer_size(struct sh_audio
*sh
, int len
)
376 if (sh
->a_out_buffer_size
< len
) {
377 mp_msg(MSGT_DECAUDIO
, MSGL_V
, "Increasing filtered audio buffer size "
378 "from %d to %d\n", sh
->a_out_buffer_size
, len
);
379 sh
->a_out_buffer
= realloc(sh
->a_out_buffer
, len
);
380 sh
->a_out_buffer_size
= len
;
384 static int filter_n_bytes(sh_audio_t
*sh
, int len
)
386 assert(len
-1 + sh
->audio_out_minsize
<= sh
->a_buffer_size
);
390 // Decode more bytes if needed
391 int old_samplerate
= sh
->samplerate
;
392 int old_channels
= sh
->channels
;
393 int old_sample_format
= sh
->sample_format
;
394 while (sh
->a_buffer_len
< len
) {
395 unsigned char *buf
= sh
->a_buffer
+ sh
->a_buffer_len
;
396 int minlen
= len
- sh
->a_buffer_len
;
397 int maxlen
= sh
->a_buffer_size
- sh
->a_buffer_len
;
398 int ret
= sh
->ad_driver
->decode_audio(sh
, buf
, minlen
, maxlen
);
399 int format_change
= sh
->samplerate
!= old_samplerate
400 || sh
->channels
!= old_channels
401 || sh
->sample_format
!= old_sample_format
;
402 if (ret
<= 0 || format_change
) {
403 error
= format_change
? -2 : -1;
404 // samples from format-changing call get discarded too
405 len
= sh
->a_buffer_len
;
408 sh
->a_buffer_len
+= ret
;
412 af_data_t filter_input
= {
413 .audio
= sh
->a_buffer
,
415 .rate
= sh
->samplerate
,
417 .format
= sh
->sample_format
419 af_fix_parameters(&filter_input
);
420 af_data_t
*filter_output
= af_play(sh
->afilter
, &filter_input
);
423 set_min_out_buffer_size(sh
, sh
->a_out_buffer_len
+ filter_output
->len
);
424 memcpy(sh
->a_out_buffer
+ sh
->a_out_buffer_len
, filter_output
->audio
,
426 sh
->a_out_buffer_len
+= filter_output
->len
;
428 // remove processed data from decoder buffer:
429 sh
->a_buffer_len
-= len
;
430 memmove(sh
->a_buffer
, sh
->a_buffer
+ len
, sh
->a_buffer_len
);
435 /* Try to get at least minlen decoded+filtered bytes in sh_audio->a_out_buffer
436 * (total length including possible existing data).
437 * Return 0 on success, -1 on error/EOF (not distinguished).
438 * In the former case sh_audio->a_out_buffer_len is always >= minlen
439 * on return. In case of EOF/error it might or might not be.
440 * Can reallocate sh_audio->a_out_buffer if needed to fit all filter output. */
441 int decode_audio(sh_audio_t
*sh_audio
, int minlen
)
443 // Indicates that a filter seems to be buffering large amounts of data
444 int huge_filter_buffer
= 0;
445 // Decoded audio must be cut at boundaries of this many bytes
446 int unitsize
= sh_audio
->channels
* sh_audio
->samplesize
* 16;
448 /* Filter output size will be about filter_multiplier times input size.
449 * If some filter buffers audio in big blocks this might only hold
450 * as average over time. */
451 double filter_multiplier
= af_calc_filter_multiplier(sh_audio
->afilter
);
453 /* If the decoder set audio_out_minsize then it can do the equivalent of
454 * "while (output_len < target_len) output_len += audio_out_minsize;",
455 * so we must guarantee there is at least audio_out_minsize-1 bytes
456 * more space in the output buffer than the minimum length we try to
458 int max_decode_len
= sh_audio
->a_buffer_size
- sh_audio
->audio_out_minsize
;
459 max_decode_len
-= max_decode_len
% unitsize
;
461 while (sh_audio
->a_out_buffer_len
< minlen
) {
462 int declen
= (minlen
- sh_audio
->a_out_buffer_len
) / filter_multiplier
463 + (unitsize
<< 5); // some extra for possible filter buffering
464 if (huge_filter_buffer
)
465 /* Some filter must be doing significant buffering if the estimated
466 * input length didn't produce enough output from filters.
467 * Feed the filters 2k bytes at a time until we have enough output.
468 * Very small amounts could make filtering inefficient while large
469 * amounts can make MPlayer demux the file unnecessarily far ahead
470 * to get audio data and buffer video frames in memory while doing
471 * so. However the performance impact of either is probably not too
472 * significant as long as the value is not completely insane. */
474 declen
-= declen
% unitsize
;
475 if (declen
> max_decode_len
)
476 declen
= max_decode_len
;
478 /* if this iteration does not fill buffer, we must have lots
479 * of buffering in filters */
480 huge_filter_buffer
= 1;
481 int res
= filter_n_bytes(sh_audio
, declen
);
488 void decode_audio_prepend_bytes(struct sh_audio
*sh
, int count
, int byte
)
490 set_min_out_buffer_size(sh
, sh
->a_out_buffer_len
+ count
);
491 memmove(sh
->a_out_buffer
+ count
, sh
->a_out_buffer
, sh
->a_out_buffer_len
);
492 memset(sh
->a_out_buffer
, byte
, count
);
493 sh
->a_out_buffer_len
+= count
;
497 void resync_audio_stream(sh_audio_t
*sh_audio
)
499 sh_audio
->a_in_buffer_len
= 0; // clear audio input buffer
500 sh_audio
->pts
= MP_NOPTS_VALUE
;
501 if (!sh_audio
->initialized
)
503 sh_audio
->ad_driver
->control(sh_audio
, ADCTRL_RESYNC_STREAM
, NULL
);
506 void skip_audio_frame(sh_audio_t
*sh_audio
)
508 if (!sh_audio
->initialized
)
510 if (sh_audio
->ad_driver
->control(sh_audio
, ADCTRL_SKIP_FRAME
, NULL
) ==
513 // default skip code:
514 ds_fill_buffer(sh_audio
->ds
); // skip block