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 *****************************************************************************/
33 #include <vlc_demux.h>
35 #include <vlc_codecs.h>
37 /*****************************************************************************
39 *****************************************************************************/
40 static int Open ( vlc_object_t * );
41 static void Close( vlc_object_t * );
44 set_description( _("WAV demuxer") );
45 set_category( CAT_INPUT );
46 set_subcategory( SUBCAT_INPUT_DEMUX );
47 set_capability( "demux", 142 );
48 set_callbacks( Open, Close );
51 /*****************************************************************************
53 *****************************************************************************/
54 static int Demux ( demux_t * );
55 static int Control( demux_t *, int i_query, va_list args );
63 unsigned int i_data_size;
65 unsigned int i_frame_size;
70 uint32_t i_channel_mask;
71 bool b_chan_reorder; /* do we need channel reordering */
72 int pi_chan_table[AOUT_CHAN_MAX];
75 #define __EVEN( x ) ( ( (x)%2 != 0 ) ? ((x)+1) : (x) )
77 static int ChunkFind( demux_t *, const char *, unsigned int * );
79 static void FrameInfo_IMA_ADPCM( demux_t *, unsigned int *, int * );
80 static void FrameInfo_MS_ADPCM ( demux_t *, unsigned int *, int * );
81 static void FrameInfo_PCM ( demux_t *, unsigned int *, int * );
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,
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,
92 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, 0 };
93 static const uint32_t pi_channels_out[] =
94 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
95 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
96 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
97 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
99 /*****************************************************************************
100 * Open: check file and initializes structures
101 *****************************************************************************/
102 static int Open( vlc_object_t * p_this )
104 demux_t *p_demux = (demux_t*)p_this;
107 const uint8_t *p_peek;
108 unsigned int i_size, i_extended;
109 const char *psz_name;
111 WAVEFORMATEXTENSIBLE *p_wf_ext = NULL;
112 WAVEFORMATEX *p_wf = NULL;
114 /* Is it a wav file ? */
115 if( stream_Peek( p_demux->s, &p_peek, 12 ) < 12 ) return VLC_EGENERIC;
117 if( memcmp( p_peek, "RIFF", 4 ) || memcmp( &p_peek[8], "WAVE", 4 ) )
122 p_demux->pf_demux = Demux;
123 p_demux->pf_control = Control;
124 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
129 p_sys->b_chan_reorder = 0;
130 p_sys->i_channel_mask = 0;
132 /* skip riff header */
133 stream_Read( p_demux->s, NULL, 12 ); /* cannot fail as peek succeed */
135 /* search fmt chunk */
136 if( ChunkFind( p_demux, "fmt ", &i_size ) )
138 msg_Err( p_demux, "cannot find 'fmt ' chunk" );
141 if( i_size < sizeof( WAVEFORMATEX ) - 2 ) /* XXX -2 isn't a typo */
143 msg_Err( p_demux, "invalid 'fmt ' chunk" );
146 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
148 /* load waveformatex */
149 p_wf_ext = malloc( __EVEN( i_size ) + 2 );
150 if( p_wf_ext == NULL )
153 p_wf = (WAVEFORMATEX *)p_wf_ext;
155 if( stream_Read( p_demux->s,
156 p_wf, __EVEN( i_size ) ) < (int)__EVEN( i_size ) )
158 msg_Err( p_demux, "cannot load 'fmt ' chunk" );
162 es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
163 wf_tag_to_fourcc( GetWLE( &p_wf->wFormatTag ), &p_sys->fmt.i_codec,
165 p_sys->fmt.audio.i_channels = GetWLE ( &p_wf->nChannels );
166 p_sys->fmt.audio.i_rate = GetDWLE( &p_wf->nSamplesPerSec );
167 p_sys->fmt.audio.i_blockalign = GetWLE( &p_wf->nBlockAlign );
168 p_sys->fmt.i_bitrate = GetDWLE( &p_wf->nAvgBytesPerSec ) * 8;
169 p_sys->fmt.audio.i_bitspersample = GetWLE( &p_wf->wBitsPerSample );
170 p_sys->fmt.i_extra = GetWLE( &p_wf->cbSize );
173 /* Handle new WAVE_FORMAT_EXTENSIBLE wav files */
174 /* see the following link for more information:
175 * http://www.microsoft.com/whdc/device/audio/multichaud.mspx#EFAA */
176 if( GetWLE( &p_wf->wFormatTag ) == WAVE_FORMAT_EXTENSIBLE &&
177 i_size >= sizeof( WAVEFORMATEXTENSIBLE ) )
179 unsigned i, i_channel_mask;
182 guid_subformat = p_wf_ext->SubFormat;
183 guid_subformat.Data1 = GetDWLE( &p_wf_ext->SubFormat.Data1 );
184 guid_subformat.Data2 = GetWLE( &p_wf_ext->SubFormat.Data2 );
185 guid_subformat.Data3 = GetWLE( &p_wf_ext->SubFormat.Data3 );
187 sf_tag_to_fourcc( &guid_subformat, &p_sys->fmt.i_codec, &psz_name );
189 i_extended = sizeof( WAVEFORMATEXTENSIBLE ) - sizeof( WAVEFORMATEX );
190 p_sys->fmt.i_extra -= i_extended;
192 i_channel_mask = GetDWLE( &p_wf_ext->dwChannelMask );
195 for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
197 if( i_channel_mask & pi_channels_src[i] )
198 p_sys->i_channel_mask |= pi_channels_in[i];
201 if( p_sys->fmt.i_codec == VLC_FOURCC('a','r','a','w') ||
202 p_sys->fmt.i_codec == VLC_FOURCC('p','c','m',' ') ||
203 p_sys->fmt.i_codec == VLC_FOURCC('a','f','l','t') )
205 p_sys->b_chan_reorder =
206 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
207 p_sys->i_channel_mask,
208 p_sys->fmt.audio.i_channels,
209 p_sys->pi_chan_table );
211 msg_Dbg( p_demux, "channel mask: %x, reordering: %i",
212 p_sys->i_channel_mask, (int)p_sys->b_chan_reorder );
214 p_sys->fmt.audio.i_physical_channels =
215 p_sys->fmt.audio.i_original_channels =
216 p_sys->i_channel_mask;
219 if( p_sys->fmt.i_extra > 0 )
221 p_sys->fmt.p_extra = malloc( p_sys->fmt.i_extra );
222 memcpy( p_sys->fmt.p_extra, ((uint8_t *)p_wf) + i_extended,
223 p_sys->fmt.i_extra );
226 msg_Dbg( p_demux, "format: 0x%4.4x, fourcc: %4.4s, channels: %d, "
227 "freq: %u Hz, bitrate: %uKo/s, blockalign: %d, bits/samples: %d, "
229 GetWLE( &p_wf->wFormatTag ), (char *)&p_sys->fmt.i_codec,
230 p_sys->fmt.audio.i_channels, p_sys->fmt.audio.i_rate,
231 p_sys->fmt.i_bitrate / 8 / 1024, p_sys->fmt.audio.i_blockalign,
232 p_sys->fmt.audio.i_bitspersample, p_sys->fmt.i_extra );
237 switch( p_sys->fmt.i_codec )
239 case VLC_FOURCC( 'a', 'r', 'a', 'w' ):
240 case VLC_FOURCC( 'a', 'f', 'l', 't' ):
241 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
242 case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
243 case VLC_FOURCC( 'm', 'l', 'a', 'w' ):
244 case VLC_FOURCC( 'p', 'c', 'm', ' ' ):
245 FrameInfo_PCM( p_demux, &p_sys->i_frame_size,
246 &p_sys->i_frame_samples );
248 case VLC_FOURCC( 'm', 's', 0x00, 0x02 ):
249 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
250 &p_sys->i_frame_samples );
252 case VLC_FOURCC( 'm', 's', 0x00, 0x11 ):
253 FrameInfo_IMA_ADPCM( p_demux, &p_sys->i_frame_size,
254 &p_sys->i_frame_samples );
256 case VLC_FOURCC( 'm', 's', 0x00, 0x61 ):
257 case VLC_FOURCC( 'm', 's', 0x00, 0x62 ):
258 /* FIXME not sure at all FIXME */
259 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
260 &p_sys->i_frame_samples );
262 case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
263 case VLC_FOURCC( 'a', '5', '2', ' ' ):
264 /* FIXME set end of area FIXME */
267 msg_Err( p_demux, "unsupported codec (%4.4s)",
268 (char*)&p_sys->fmt.i_codec );
272 msg_Dbg( p_demux, "found %s audio format", psz_name );
274 if( ChunkFind( p_demux, "data", &p_sys->i_data_size ) )
276 msg_Err( p_demux, "cannot find 'data' chunk" );
279 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
280 p_sys->i_data_pos = stream_Tell( p_demux->s );
282 if( p_sys->fmt.i_bitrate <= 0 )
284 p_sys->fmt.i_bitrate = (mtime_t)p_sys->i_frame_size *
285 p_sys->fmt.audio.i_rate * 8 / p_sys->i_frame_samples;
288 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
290 date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
291 date_Set( &p_sys->pts, 1 );
301 /*****************************************************************************
302 * Demux: read packet and send them to decoders
303 *****************************************************************************
304 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
305 *****************************************************************************/
306 static int Demux( demux_t *p_demux )
308 demux_sys_t *p_sys = p_demux->p_sys;
312 i_pos = stream_Tell( p_demux->s );
314 if( p_sys->i_data_size > 0 &&
315 i_pos >= p_sys->i_data_pos + p_sys->i_data_size )
321 if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
323 msg_Warn( p_demux, "cannot read data" );
327 p_block->i_dts = p_block->i_pts =
328 date_Increment( &p_sys->pts, p_sys->i_frame_samples );
331 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
333 /* Do the channel reordering */
334 if( p_sys->b_chan_reorder )
335 aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
336 p_sys->fmt.audio.i_channels,
337 p_sys->pi_chan_table,
338 p_sys->fmt.audio.i_bitspersample );
340 es_out_Send( p_demux->out, p_sys->p_es, p_block );
345 /*****************************************************************************
346 * Close: frees unused data
347 *****************************************************************************/
348 static void Close ( vlc_object_t * p_this )
350 demux_t *p_demux = (demux_t*)p_this;
351 demux_sys_t *p_sys = p_demux->p_sys;
356 /*****************************************************************************
358 *****************************************************************************/
359 static int Control( demux_t *p_demux, int i_query, va_list args )
361 demux_sys_t *p_sys = p_demux->p_sys;
364 if( p_sys->i_data_size > 0 )
366 i_end = p_sys->i_data_pos + p_sys->i_data_size;
369 return demux_vaControlHelper( p_demux->s, p_sys->i_data_pos, i_end,
370 p_sys->fmt.i_bitrate,
371 p_sys->fmt.audio.i_blockalign,
375 /*****************************************************************************
377 *****************************************************************************/
378 static int ChunkFind( demux_t *p_demux, const char *fcc, unsigned int *pi_size )
380 const uint8_t *p_peek;
386 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
388 msg_Err( p_demux, "cannot peek()" );
392 i_size = GetDWLE( p_peek + 4 );
394 msg_Dbg( p_demux, "chunk: fcc=`%4.4s` size=%d", p_peek, i_size );
396 if( !memcmp( p_peek, fcc, 4 ) )
405 i_size = __EVEN( i_size ) + 8;
406 if( stream_Read( p_demux->s, NULL, i_size ) != i_size )
413 static void FrameInfo_PCM( demux_t *p_demux, unsigned int *pi_size,
416 demux_sys_t *p_sys = p_demux->p_sys;
417 int i_bytes, i_modulo;
419 /* read samples for 50ms of */
420 *pi_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
422 i_bytes = *pi_samples * p_sys->fmt.audio.i_channels *
423 ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
425 if( p_sys->fmt.audio.i_blockalign > 0 )
427 if( ( i_modulo = i_bytes % p_sys->fmt.audio.i_blockalign ) != 0 )
429 i_bytes += p_sys->fmt.audio.i_blockalign - i_modulo;
436 static void FrameInfo_MS_ADPCM( demux_t *p_demux, unsigned int *pi_size,
439 demux_sys_t *p_sys = p_demux->p_sys;
441 *pi_samples = 2 + 2 * ( p_sys->fmt.audio.i_blockalign -
442 7 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
444 *pi_size = p_sys->fmt.audio.i_blockalign;
447 static void FrameInfo_IMA_ADPCM( demux_t *p_demux, unsigned int *pi_size,
450 demux_sys_t *p_sys = p_demux->p_sys;
452 *pi_samples = 2 * ( p_sys->fmt.audio.i_blockalign -
453 4 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
455 *pi_size = p_sys->fmt.audio.i_blockalign;