Qt: add asserts around p_input access
[vlc.git] / modules / demux / wav.c
blob4a96f0e1257c99eb8ed0e56ce0e9b187f0df25a2
1 /*****************************************************************************
2 * wav.c : wav file input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001-2008 the VideoLAN team
5 * $Id$
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
25 * Preamble
26 *****************************************************************************/
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_demux.h>
35 #include <vlc_aout.h>
36 #include <vlc_codecs.h>
38 /*****************************************************************************
39 * Module descriptor
40 *****************************************************************************/
41 static int Open ( vlc_object_t * );
42 static void Close( vlc_object_t * );
44 vlc_module_begin ()
45 set_description( N_("WAV demuxer") )
46 set_category( CAT_INPUT )
47 set_subcategory( SUBCAT_INPUT_DEMUX )
48 set_capability( "demux", 142 )
49 set_callbacks( Open, Close )
50 vlc_module_end ()
52 /*****************************************************************************
53 * Local prototypes
54 *****************************************************************************/
55 static int Demux ( demux_t * );
56 static int Control( demux_t *, int i_query, va_list args );
58 struct demux_sys_t
60 es_format_t fmt;
61 es_out_id_t *p_es;
63 int64_t i_data_pos;
64 unsigned int i_data_size;
66 unsigned int i_frame_size;
67 int i_frame_samples;
69 date_t pts;
71 uint32_t i_channel_mask;
72 bool b_chan_reorder; /* do we need channel reordering */
73 int pi_chan_table[AOUT_CHAN_MAX];
76 static int ChunkFind( demux_t *, const char *, unsigned int * );
78 static int FrameInfo_IMA_ADPCM( unsigned int *, int *, const es_format_t * );
79 static int FrameInfo_MS_ADPCM ( unsigned int *, int *, const es_format_t * );
80 static int FrameInfo_PCM ( unsigned int *, int *, const es_format_t * );
81 static int FrameInfo_MSGSM ( unsigned int *, int *, const es_format_t * );
83 static const uint32_t pi_channels_src[] =
84 { WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT,
85 WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY,
86 WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT, WAVE_SPEAKER_BACK_CENTER,
87 WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT, 0 };
88 static const uint32_t pi_channels_in[] =
89 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
90 AOUT_CHAN_CENTER, AOUT_CHAN_LFE,
91 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_REARCENTER,
92 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, 0 };
94 /*****************************************************************************
95 * Open: check file and initializes structures
96 *****************************************************************************/
97 static int Open( vlc_object_t * p_this )
99 demux_t *p_demux = (demux_t*)p_this;
100 demux_sys_t *p_sys;
102 const uint8_t *p_peek;
103 unsigned int i_size;
104 unsigned int i_extended;
105 const char *psz_name;
107 WAVEFORMATEXTENSIBLE *p_wf_ext = NULL;
108 WAVEFORMATEX *p_wf = NULL;
110 /* Is it a wav file ? */
111 if( stream_Peek( p_demux->s, &p_peek, 12 ) < 12 )
112 return VLC_EGENERIC;
114 if( memcmp( p_peek, "RIFF", 4 ) || memcmp( &p_peek[8], "WAVE", 4 ) )
116 return VLC_EGENERIC;
119 p_demux->pf_demux = Demux;
120 p_demux->pf_control = Control;
121 p_demux->p_sys = p_sys = malloc( sizeof( *p_sys ) );
122 if( p_sys == NULL )
123 return VLC_ENOMEM;
125 p_sys->p_es = NULL;
126 p_sys->b_chan_reorder = false;
127 p_sys->i_channel_mask = 0;
129 /* skip riff header */
130 if( stream_Read( p_demux->s, NULL, 12 ) != 12 )
131 goto error;
133 /* search fmt chunk */
134 if( ChunkFind( p_demux, "fmt ", &i_size ) )
136 msg_Err( p_demux, "cannot find 'fmt ' chunk" );
137 goto error;
139 i_size += 2;
140 if( i_size < sizeof( WAVEFORMATEX ) )
142 msg_Err( p_demux, "invalid 'fmt ' chunk" );
143 goto error;
145 if( stream_Read( p_demux->s, NULL, 8 ) != 8 )
146 goto error;
149 /* load waveformatex */
150 p_wf_ext = malloc( i_size );
151 if( p_wf_ext == NULL )
152 goto error;
154 p_wf = &p_wf_ext->Format;
155 p_wf->cbSize = 0;
156 i_size -= 2;
157 if( stream_Read( p_demux->s, p_wf, i_size ) != (int)i_size ||
158 ( ( i_size & 1 ) && stream_Read( p_demux->s, NULL, 1 ) != 1 ) )
160 msg_Err( p_demux, "cannot load 'fmt ' chunk" );
161 goto error;
164 es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
165 wf_tag_to_fourcc( GetWLE( &p_wf->wFormatTag ), &p_sys->fmt.i_codec,
166 &psz_name );
167 p_sys->fmt.audio.i_channels = GetWLE ( &p_wf->nChannels );
168 p_sys->fmt.audio.i_rate = GetDWLE( &p_wf->nSamplesPerSec );
169 p_sys->fmt.audio.i_blockalign = GetWLE( &p_wf->nBlockAlign );
170 p_sys->fmt.i_bitrate = GetDWLE( &p_wf->nAvgBytesPerSec ) * 8;
171 p_sys->fmt.audio.i_bitspersample = GetWLE( &p_wf->wBitsPerSample );
172 if( i_size >= sizeof(WAVEFORMATEX) )
173 p_sys->fmt.i_extra = __MIN( GetWLE( &p_wf->cbSize ), i_size - sizeof(WAVEFORMATEX) );
174 i_extended = 0;
176 /* Handle new WAVE_FORMAT_EXTENSIBLE wav files */
177 /* see the following link for more information:
178 * http://www.microsoft.com/whdc/device/audio/multichaud.mspx#EFAA */
179 if( GetWLE( &p_wf->wFormatTag ) == WAVE_FORMAT_EXTENSIBLE &&
180 i_size >= sizeof( WAVEFORMATEXTENSIBLE ) &&
181 ( p_sys->fmt.i_extra + sizeof( WAVEFORMATEX )
182 >= sizeof( WAVEFORMATEXTENSIBLE ) ) )
184 unsigned i, i_channel_mask;
185 GUID guid_subformat;
187 guid_subformat = p_wf_ext->SubFormat;
188 guid_subformat.Data1 = GetDWLE( &p_wf_ext->SubFormat.Data1 );
189 guid_subformat.Data2 = GetWLE( &p_wf_ext->SubFormat.Data2 );
190 guid_subformat.Data3 = GetWLE( &p_wf_ext->SubFormat.Data3 );
192 sf_tag_to_fourcc( &guid_subformat, &p_sys->fmt.i_codec, &psz_name );
194 i_extended = sizeof( WAVEFORMATEXTENSIBLE ) - sizeof( WAVEFORMATEX );
195 p_sys->fmt.i_extra -= i_extended;
197 i_channel_mask = GetDWLE( &p_wf_ext->dwChannelMask );
198 if( i_channel_mask )
200 int i_match = 0;
201 for( i = 0; i < sizeof(pi_channels_src)/sizeof(*pi_channels_src); i++ )
203 if( i_channel_mask & pi_channels_src[i] )
205 if( !( p_sys->i_channel_mask & pi_channels_in[i] ) )
206 i_match++;
208 i_channel_mask &= ~pi_channels_src[i];
209 p_sys->i_channel_mask |= pi_channels_in[i];
211 if( i_match >= p_sys->fmt.audio.i_channels )
212 break;
215 if( i_channel_mask )
216 msg_Warn( p_demux, "Some channels are unrecognized or uselessly specified (0x%x)", i_channel_mask );
217 if( i_match < p_sys->fmt.audio.i_channels )
219 int i_missing = p_sys->fmt.audio.i_channels - i_match;
220 msg_Warn( p_demux, "Trying to fill up unspecified position for %d channels", p_sys->fmt.audio.i_channels - i_match );
222 static const uint32_t pi_pair[] = { AOUT_CHAN_REARLEFT|AOUT_CHAN_REARRIGHT,
223 AOUT_CHAN_MIDDLELEFT|AOUT_CHAN_MIDDLERIGHT,
224 AOUT_CHAN_LEFT|AOUT_CHAN_RIGHT };
225 /* FIXME: Unused yet
226 static const uint32_t pi_center[] = { AOUT_CHAN_REARCENTER,
228 AOUT_CHAN_CENTER }; */
230 /* Try to complete with pair */
231 for( unsigned i = 0; i < sizeof(pi_pair)/sizeof(*pi_pair); i++ )
233 if( i_missing >= 2 && !(p_sys->i_channel_mask & pi_pair[i] ) )
235 i_missing -= 2;
236 p_sys->i_channel_mask |= pi_pair[i];
239 /* Well fill up with what we can */
240 for( unsigned i = 0; i < sizeof(pi_channels_in)/sizeof(*pi_channels_in) && i_missing > 0; i++ )
242 if( !( p_sys->i_channel_mask & pi_channels_in[i] ) )
244 p_sys->i_channel_mask |= pi_channels_in[i];
245 i_missing--;
247 if( i_missing <= 0 )
248 break;
252 i_match = p_sys->fmt.audio.i_channels - i_missing;
254 if( i_match < p_sys->fmt.audio.i_channels )
256 msg_Err( p_demux, "Invalid/unsupported channel mask" );
257 p_sys->i_channel_mask = 0;
261 else if( GetWLE( &p_wf->wFormatTag ) == WAVE_FORMAT_PCM &&
262 p_sys->fmt.audio.i_channels > 2 && p_sys->fmt.audio.i_channels <= 9 )
264 for( int i = 0; i < p_sys->fmt.audio.i_channels; i++ )
265 p_sys->i_channel_mask |= pi_channels_in[i];
268 if( p_sys->i_channel_mask )
270 if( p_sys->fmt.i_codec == VLC_FOURCC('a','r','a','w') ||
271 p_sys->fmt.i_codec == VLC_FOURCC('p','c','m',' ') ||
272 p_sys->fmt.i_codec == VLC_FOURCC('a','f','l','t') )
273 p_sys->b_chan_reorder =
274 aout_CheckChannelReorder( pi_channels_in, NULL,
275 p_sys->i_channel_mask,
276 p_sys->fmt.audio.i_channels,
277 p_sys->pi_chan_table );
279 msg_Dbg( p_demux, "channel mask: %x, reordering: %i",
280 p_sys->i_channel_mask, (int)p_sys->b_chan_reorder );
283 p_sys->fmt.audio.i_physical_channels =
284 p_sys->fmt.audio.i_original_channels = p_sys->i_channel_mask;
286 if( p_sys->fmt.i_extra > 0 )
288 p_sys->fmt.p_extra = malloc( p_sys->fmt.i_extra );
289 if( !p_sys->fmt.p_extra )
291 p_sys->fmt.i_extra = 0;
292 goto error;
294 memcpy( p_sys->fmt.p_extra, (uint8_t *)p_wf + sizeof( WAVEFORMATEX ) + i_extended,
295 p_sys->fmt.i_extra );
298 msg_Dbg( p_demux, "format: 0x%4.4x, fourcc: %4.4s, channels: %d, "
299 "freq: %u Hz, bitrate: %uKo/s, blockalign: %d, bits/samples: %d, "
300 "extra size: %d",
301 GetWLE( &p_wf->wFormatTag ), (char *)&p_sys->fmt.i_codec,
302 p_sys->fmt.audio.i_channels, p_sys->fmt.audio.i_rate,
303 p_sys->fmt.i_bitrate / 8 / 1024, p_sys->fmt.audio.i_blockalign,
304 p_sys->fmt.audio.i_bitspersample, p_sys->fmt.i_extra );
306 free( p_wf );
307 p_wf = NULL;
309 switch( p_sys->fmt.i_codec )
311 case VLC_FOURCC( 'a', 'r', 'a', 'w' ):
312 case VLC_FOURCC( 'a', 'f', 'l', 't' ):
313 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
314 case VLC_CODEC_ALAW:
315 case VLC_CODEC_MULAW:
316 case VLC_FOURCC( 'p', 'c', 'm', ' ' ):
317 if( FrameInfo_PCM( &p_sys->i_frame_size, &p_sys->i_frame_samples,
318 &p_sys->fmt ) )
319 goto error;
320 break;
321 case VLC_CODEC_ADPCM_MS:
322 if( FrameInfo_MS_ADPCM( &p_sys->i_frame_size, &p_sys->i_frame_samples,
323 &p_sys->fmt ) )
324 goto error;
325 break;
326 case VLC_CODEC_ADPCM_IMA_WAV:
327 if( FrameInfo_IMA_ADPCM( &p_sys->i_frame_size, &p_sys->i_frame_samples,
328 &p_sys->fmt ) )
329 goto error;
330 break;
331 case VLC_FOURCC( 'm', 's', 0x00, 0x61 ):
332 case VLC_FOURCC( 'm', 's', 0x00, 0x62 ):
333 /* FIXME not sure at all FIXME */
334 if( FrameInfo_MS_ADPCM( &p_sys->i_frame_size, &p_sys->i_frame_samples,
335 &p_sys->fmt ) )
336 goto error;
337 break;
338 case VLC_CODEC_MPGA:
339 case VLC_CODEC_A52:
340 /* FIXME set end of area FIXME */
341 goto error;
342 case VLC_CODEC_GSM_MS:
343 case VLC_CODEC_ADPCM_G726:
344 if( FrameInfo_MSGSM( &p_sys->i_frame_size, &p_sys->i_frame_samples,
345 &p_sys->fmt ) )
346 goto error;
347 break;
348 default:
349 msg_Err( p_demux, "unsupported codec (%4.4s)",
350 (char*)&p_sys->fmt.i_codec );
351 goto error;
354 if( p_sys->i_frame_size <= 0 || p_sys->i_frame_samples <= 0 )
356 msg_Dbg( p_demux, "invalid frame size: %i %i", p_sys->i_frame_size,
357 p_sys->i_frame_samples );
358 goto error;
360 if( p_sys->fmt.audio.i_rate <= 0 )
362 msg_Dbg( p_demux, "invalid sample rate: %i", p_sys->fmt.audio.i_rate );
363 goto error;
366 msg_Dbg( p_demux, "found %s audio format", psz_name );
368 if( ChunkFind( p_demux, "data", &p_sys->i_data_size ) )
370 msg_Err( p_demux, "cannot find 'data' chunk" );
371 goto error;
373 if( stream_Read( p_demux->s, NULL, 8 ) != 8 )
374 goto error;
375 p_sys->i_data_pos = stream_Tell( p_demux->s );
377 if( p_sys->fmt.i_bitrate <= 0 )
379 p_sys->fmt.i_bitrate = (int64_t)p_sys->i_frame_size *
380 p_sys->fmt.audio.i_rate * 8 / p_sys->i_frame_samples;
383 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
385 date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
386 date_Set( &p_sys->pts, 1 );
388 return VLC_SUCCESS;
390 error:
391 msg_Err( p_demux, "An error occured during wav demuxing" );
392 free( p_wf );
393 free( p_sys );
394 return VLC_EGENERIC;
397 /*****************************************************************************
398 * Demux: read packet and send them to decoders
399 *****************************************************************************
400 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
401 *****************************************************************************/
402 static int Demux( demux_t *p_demux )
404 demux_sys_t *p_sys = p_demux->p_sys;
405 block_t *p_block;
406 const int64_t i_pos = stream_Tell( p_demux->s );
408 if( p_sys->i_data_size > 0 &&
409 i_pos >= p_sys->i_data_pos + p_sys->i_data_size )
411 /* EOF */
412 return 0;
415 if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
417 msg_Warn( p_demux, "cannot read data" );
418 return 0;
421 p_block->i_dts =
422 p_block->i_pts = VLC_TS_0 + date_Get( &p_sys->pts );
424 /* set PCR */
425 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
427 /* Do the channel reordering */
428 if( p_sys->b_chan_reorder )
429 aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
430 p_sys->fmt.audio.i_channels,
431 p_sys->pi_chan_table,
432 p_sys->fmt.audio.i_bitspersample );
434 es_out_Send( p_demux->out, p_sys->p_es, p_block );
436 date_Increment( &p_sys->pts, p_sys->i_frame_samples );
438 return 1;
441 /*****************************************************************************
442 * Close: frees unused data
443 *****************************************************************************/
444 static void Close ( vlc_object_t * p_this )
446 demux_t *p_demux = (demux_t*)p_this;
447 demux_sys_t *p_sys = p_demux->p_sys;
449 free( p_sys );
452 /*****************************************************************************
453 * Control:
454 *****************************************************************************/
455 static int Control( demux_t *p_demux, int i_query, va_list args )
457 demux_sys_t *p_sys = p_demux->p_sys;
458 int64_t i_end = -1;
460 if( p_sys->i_data_size > 0 )
461 i_end = p_sys->i_data_pos + p_sys->i_data_size;
463 return demux_vaControlHelper( p_demux->s, p_sys->i_data_pos, i_end,
464 p_sys->fmt.i_bitrate,
465 p_sys->fmt.audio.i_blockalign,
466 i_query, args );
469 /*****************************************************************************
470 * Local functions
471 *****************************************************************************/
472 static int ChunkFind( demux_t *p_demux, const char *fcc, unsigned int *pi_size )
474 const uint8_t *p_peek;
476 for( ;; )
478 uint32_t i_size;
480 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
482 msg_Err( p_demux, "cannot peek" );
483 return VLC_EGENERIC;
486 i_size = GetDWLE( p_peek + 4 );
488 msg_Dbg( p_demux, "chunk: fcc=`%4.4s` size=%"PRIu32, p_peek, i_size );
490 if( !memcmp( p_peek, fcc, 4 ) )
492 if( pi_size )
494 *pi_size = i_size;
496 return VLC_SUCCESS;
499 /* Skip chunk */
500 if( stream_Read( p_demux->s, NULL, 8 ) != 8 ||
501 stream_Read( p_demux->s, NULL, i_size ) != (int)i_size ||
502 ( (i_size & 1) && stream_Read( p_demux->s, NULL, 1 ) != 1 ) )
503 return VLC_EGENERIC;
507 static int FrameInfo_PCM( unsigned int *pi_size, int *pi_samples,
508 const es_format_t *p_fmt )
510 int i_bytes;
512 /* read samples for 50ms of */
513 *pi_samples = __MAX( p_fmt->audio.i_rate / 20, 1 );
515 i_bytes = *pi_samples * p_fmt->audio.i_channels *
516 ( (p_fmt->audio.i_bitspersample + 7) / 8 );
518 if( p_fmt->audio.i_blockalign > 0 )
520 const int i_modulo = i_bytes % p_fmt->audio.i_blockalign;
521 if( i_modulo > 0 )
522 i_bytes += p_fmt->audio.i_blockalign - i_modulo;
525 *pi_size = i_bytes;
526 return VLC_SUCCESS;
529 static int FrameInfo_MS_ADPCM( unsigned int *pi_size, int *pi_samples,
530 const es_format_t *p_fmt )
532 if( p_fmt->audio.i_channels <= 0 )
533 return VLC_EGENERIC;
535 *pi_samples = 2 + 2 * ( p_fmt->audio.i_blockalign -
536 7 * p_fmt->audio.i_channels ) / p_fmt->audio.i_channels;
537 *pi_size = p_fmt->audio.i_blockalign;
539 return VLC_SUCCESS;
542 static int FrameInfo_IMA_ADPCM( unsigned int *pi_size, int *pi_samples,
543 const es_format_t *p_fmt )
545 if( p_fmt->audio.i_channels <= 0 )
546 return VLC_EGENERIC;
548 *pi_samples = 2 * ( p_fmt->audio.i_blockalign -
549 4 * p_fmt->audio.i_channels ) / p_fmt->audio.i_channels;
550 *pi_size = p_fmt->audio.i_blockalign;
552 return VLC_SUCCESS;
555 static int FrameInfo_MSGSM( unsigned int *pi_size, int *pi_samples,
556 const es_format_t *p_fmt )
558 if( p_fmt->i_bitrate <= 0 )
559 return VLC_EGENERIC;
561 *pi_samples = ( p_fmt->audio.i_blockalign * p_fmt->audio.i_rate * 8)
562 / p_fmt->i_bitrate;
563 *pi_size = p_fmt->audio.i_blockalign;
565 return VLC_SUCCESS;