1 /*****************************************************************************
2 * wav.c : wav file input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001-2007 the VideoLAN team
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 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_demux.h>
36 #include <vlc_codecs.h>
38 /*****************************************************************************
40 *****************************************************************************/
41 static int Open ( vlc_object_t * );
42 static void Close( vlc_object_t * );
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 );
52 /*****************************************************************************
54 *****************************************************************************/
55 static int Demux ( demux_t * );
56 static int Control( demux_t *, int i_query, va_list args );
64 unsigned int i_data_size;
66 unsigned int i_frame_size;
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 #define __EVEN( x ) ( ( (x)%2 != 0 ) ? ((x)+1) : (x) )
78 static int ChunkFind( demux_t *, const char *, unsigned int * );
80 static void FrameInfo_IMA_ADPCM( demux_t *, unsigned int *, int * );
81 static void FrameInfo_MS_ADPCM ( demux_t *, unsigned int *, int * );
82 static void FrameInfo_PCM ( demux_t *, unsigned int *, int * );
84 static const uint32_t pi_channels_src[] =
85 { WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT,
86 WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY,
87 WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT,
88 WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT, 0 };
89 static const uint32_t pi_channels_in[] =
90 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
91 AOUT_CHAN_CENTER, AOUT_CHAN_LFE,
92 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
93 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, 0 };
94 static const uint32_t pi_channels_out[] =
95 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
96 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
97 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
98 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
100 /*****************************************************************************
101 * Open: check file and initializes structures
102 *****************************************************************************/
103 static int Open( vlc_object_t * p_this )
105 demux_t *p_demux = (demux_t*)p_this;
108 const uint8_t *p_peek;
109 unsigned int i_size, i_extended;
110 const char *psz_name;
112 WAVEFORMATEXTENSIBLE *p_wf_ext = NULL;
113 WAVEFORMATEX *p_wf = NULL;
115 /* Is it a wav file ? */
116 if( stream_Peek( p_demux->s, &p_peek, 12 ) < 12 ) return VLC_EGENERIC;
118 if( memcmp( p_peek, "RIFF", 4 ) || memcmp( &p_peek[8], "WAVE", 4 ) )
123 p_demux->pf_demux = Demux;
124 p_demux->pf_control = Control;
125 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
130 p_sys->b_chan_reorder = 0;
131 p_sys->i_channel_mask = 0;
133 /* skip riff header */
134 stream_Read( p_demux->s, NULL, 12 ); /* cannot fail as peek succeed */
136 /* search fmt chunk */
137 if( ChunkFind( p_demux, "fmt ", &i_size ) )
139 msg_Err( p_demux, "cannot find 'fmt ' chunk" );
142 if( i_size < sizeof( WAVEFORMATEX ) - 2 ) /* XXX -2 isn't a typo */
144 msg_Err( p_demux, "invalid 'fmt ' chunk" );
147 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
149 /* load waveformatex */
150 p_wf_ext = malloc( __EVEN( i_size ) + 2 );
151 if( p_wf_ext == NULL )
154 p_wf = (WAVEFORMATEX *)p_wf_ext;
156 if( stream_Read( p_demux->s,
157 p_wf, __EVEN( i_size ) ) < (int)__EVEN( i_size ) )
159 msg_Err( p_demux, "cannot load 'fmt ' chunk" );
163 es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
164 wf_tag_to_fourcc( GetWLE( &p_wf->wFormatTag ), &p_sys->fmt.i_codec,
166 p_sys->fmt.audio.i_channels = GetWLE ( &p_wf->nChannels );
167 p_sys->fmt.audio.i_rate = GetDWLE( &p_wf->nSamplesPerSec );
168 p_sys->fmt.audio.i_blockalign = GetWLE( &p_wf->nBlockAlign );
169 p_sys->fmt.i_bitrate = GetDWLE( &p_wf->nAvgBytesPerSec ) * 8;
170 p_sys->fmt.audio.i_bitspersample = GetWLE( &p_wf->wBitsPerSample );
171 p_sys->fmt.i_extra = GetWLE( &p_wf->cbSize );
174 /* Handle new WAVE_FORMAT_EXTENSIBLE wav files */
175 /* see the following link for more information:
176 * http://www.microsoft.com/whdc/device/audio/multichaud.mspx#EFAA */
177 if( GetWLE( &p_wf->wFormatTag ) == WAVE_FORMAT_EXTENSIBLE &&
178 i_size >= sizeof( WAVEFORMATEXTENSIBLE ) )
180 unsigned i, i_channel_mask;
183 guid_subformat = p_wf_ext->SubFormat;
184 guid_subformat.Data1 = GetDWLE( &p_wf_ext->SubFormat.Data1 );
185 guid_subformat.Data2 = GetWLE( &p_wf_ext->SubFormat.Data2 );
186 guid_subformat.Data3 = GetWLE( &p_wf_ext->SubFormat.Data3 );
188 sf_tag_to_fourcc( &guid_subformat, &p_sys->fmt.i_codec, &psz_name );
190 i_extended = sizeof( WAVEFORMATEXTENSIBLE ) - sizeof( WAVEFORMATEX );
191 p_sys->fmt.i_extra -= i_extended;
193 i_channel_mask = GetDWLE( &p_wf_ext->dwChannelMask );
196 for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
198 if( i_channel_mask & pi_channels_src[i] )
199 p_sys->i_channel_mask |= pi_channels_in[i];
202 if( p_sys->fmt.i_codec == VLC_FOURCC('a','r','a','w') ||
203 p_sys->fmt.i_codec == VLC_FOURCC('p','c','m',' ') ||
204 p_sys->fmt.i_codec == VLC_FOURCC('a','f','l','t') )
206 p_sys->b_chan_reorder =
207 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
208 p_sys->i_channel_mask,
209 p_sys->fmt.audio.i_channels,
210 p_sys->pi_chan_table );
212 msg_Dbg( p_demux, "channel mask: %x, reordering: %i",
213 p_sys->i_channel_mask, (int)p_sys->b_chan_reorder );
215 p_sys->fmt.audio.i_physical_channels =
216 p_sys->fmt.audio.i_original_channels =
217 p_sys->i_channel_mask;
220 if( p_sys->fmt.i_extra > 0 )
222 p_sys->fmt.p_extra = malloc( p_sys->fmt.i_extra );
223 memcpy( p_sys->fmt.p_extra, ((uint8_t *)p_wf) + i_extended,
224 p_sys->fmt.i_extra );
227 msg_Dbg( p_demux, "format: 0x%4.4x, fourcc: %4.4s, channels: %d, "
228 "freq: %u Hz, bitrate: %uKo/s, blockalign: %d, bits/samples: %d, "
230 GetWLE( &p_wf->wFormatTag ), (char *)&p_sys->fmt.i_codec,
231 p_sys->fmt.audio.i_channels, p_sys->fmt.audio.i_rate,
232 p_sys->fmt.i_bitrate / 8 / 1024, p_sys->fmt.audio.i_blockalign,
233 p_sys->fmt.audio.i_bitspersample, p_sys->fmt.i_extra );
238 switch( p_sys->fmt.i_codec )
240 case VLC_FOURCC( 'a', 'r', 'a', 'w' ):
241 case VLC_FOURCC( 'a', 'f', 'l', 't' ):
242 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
243 case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
244 case VLC_FOURCC( 'm', 'l', 'a', 'w' ):
245 case VLC_FOURCC( 'p', 'c', 'm', ' ' ):
246 FrameInfo_PCM( p_demux, &p_sys->i_frame_size,
247 &p_sys->i_frame_samples );
249 case VLC_FOURCC( 'm', 's', 0x00, 0x02 ):
250 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
251 &p_sys->i_frame_samples );
253 case VLC_FOURCC( 'm', 's', 0x00, 0x11 ):
254 FrameInfo_IMA_ADPCM( p_demux, &p_sys->i_frame_size,
255 &p_sys->i_frame_samples );
257 case VLC_FOURCC( 'm', 's', 0x00, 0x61 ):
258 case VLC_FOURCC( 'm', 's', 0x00, 0x62 ):
259 /* FIXME not sure at all FIXME */
260 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
261 &p_sys->i_frame_samples );
263 case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
264 case VLC_FOURCC( 'a', '5', '2', ' ' ):
265 /* FIXME set end of area FIXME */
268 msg_Err( p_demux, "unsupported codec (%4.4s)",
269 (char*)&p_sys->fmt.i_codec );
273 msg_Dbg( p_demux, "found %s audio format", psz_name );
275 if( ChunkFind( p_demux, "data", &p_sys->i_data_size ) )
277 msg_Err( p_demux, "cannot find 'data' chunk" );
280 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
281 p_sys->i_data_pos = stream_Tell( p_demux->s );
283 if( p_sys->fmt.i_bitrate <= 0 )
285 p_sys->fmt.i_bitrate = (mtime_t)p_sys->i_frame_size *
286 p_sys->fmt.audio.i_rate * 8 / p_sys->i_frame_samples;
289 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
291 date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
292 date_Set( &p_sys->pts, 1 );
302 /*****************************************************************************
303 * Demux: read packet and send them to decoders
304 *****************************************************************************
305 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
306 *****************************************************************************/
307 static int Demux( demux_t *p_demux )
309 demux_sys_t *p_sys = p_demux->p_sys;
313 i_pos = stream_Tell( p_demux->s );
315 if( p_sys->i_data_size > 0 &&
316 i_pos >= p_sys->i_data_pos + p_sys->i_data_size )
322 if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
324 msg_Warn( p_demux, "cannot read data" );
328 p_block->i_dts = p_block->i_pts =
329 date_Increment( &p_sys->pts, p_sys->i_frame_samples );
332 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
334 /* Do the channel reordering */
335 if( p_sys->b_chan_reorder )
336 aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
337 p_sys->fmt.audio.i_channels,
338 p_sys->pi_chan_table,
339 p_sys->fmt.audio.i_bitspersample );
341 es_out_Send( p_demux->out, p_sys->p_es, p_block );
346 /*****************************************************************************
347 * Close: frees unused data
348 *****************************************************************************/
349 static void Close ( vlc_object_t * p_this )
351 demux_t *p_demux = (demux_t*)p_this;
352 demux_sys_t *p_sys = p_demux->p_sys;
357 /*****************************************************************************
359 *****************************************************************************/
360 static int Control( demux_t *p_demux, int i_query, va_list args )
362 demux_sys_t *p_sys = p_demux->p_sys;
365 if( p_sys->i_data_size > 0 )
367 i_end = p_sys->i_data_pos + p_sys->i_data_size;
370 return demux_vaControlHelper( p_demux->s, p_sys->i_data_pos, i_end,
371 p_sys->fmt.i_bitrate,
372 p_sys->fmt.audio.i_blockalign,
376 /*****************************************************************************
378 *****************************************************************************/
379 static int ChunkFind( demux_t *p_demux, const char *fcc, unsigned int *pi_size )
381 const uint8_t *p_peek;
387 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
389 msg_Err( p_demux, "cannot peek()" );
393 i_size = GetDWLE( p_peek + 4 );
395 msg_Dbg( p_demux, "chunk: fcc=`%4.4s` size=%d", p_peek, i_size );
397 if( !memcmp( p_peek, fcc, 4 ) )
406 i_size = __EVEN( i_size ) + 8;
407 if( stream_Read( p_demux->s, NULL, i_size ) != i_size )
414 static void FrameInfo_PCM( demux_t *p_demux, unsigned int *pi_size,
417 demux_sys_t *p_sys = p_demux->p_sys;
418 int i_bytes, i_modulo;
420 /* read samples for 50ms of */
421 *pi_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
423 i_bytes = *pi_samples * p_sys->fmt.audio.i_channels *
424 ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
426 if( p_sys->fmt.audio.i_blockalign > 0 )
428 if( ( i_modulo = i_bytes % p_sys->fmt.audio.i_blockalign ) != 0 )
430 i_bytes += p_sys->fmt.audio.i_blockalign - i_modulo;
437 static void FrameInfo_MS_ADPCM( demux_t *p_demux, unsigned int *pi_size,
440 demux_sys_t *p_sys = p_demux->p_sys;
442 *pi_samples = 2 + 2 * ( p_sys->fmt.audio.i_blockalign -
443 7 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
445 *pi_size = p_sys->fmt.audio.i_blockalign;
448 static void FrameInfo_IMA_ADPCM( demux_t *p_demux, unsigned int *pi_size,
451 demux_sys_t *p_sys = p_demux->p_sys;
453 *pi_samples = 2 * ( p_sys->fmt.audio.i_blockalign -
454 4 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
456 *pi_size = p_sys->fmt.audio.i_blockalign;