1 /*****************************************************************************
2 * wav.c : wav file input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001-2003 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 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
30 #include <vlc_demux.h>
32 #include <vlc_codecs.h>
34 /*****************************************************************************
36 *****************************************************************************/
37 static int Open ( vlc_object_t * );
38 static void Close( vlc_object_t * );
41 set_description( _("WAV demuxer") );
42 set_category( CAT_INPUT );
43 set_subcategory( SUBCAT_INPUT_DEMUX );
44 set_capability( "demux2", 142 );
45 set_callbacks( Open, Close );
48 /*****************************************************************************
50 *****************************************************************************/
51 static int Demux ( demux_t * );
52 static int Control( demux_t *, int i_query, va_list args );
60 unsigned int i_data_size;
62 unsigned int i_frame_size;
67 uint32_t i_channel_mask;
68 vlc_bool_t b_chan_reorder; /* do we need channel reordering */
69 int pi_chan_table[AOUT_CHAN_MAX];
72 #define __EVEN( x ) ( ( (x)%2 != 0 ) ? ((x)+1) : (x) )
74 static int ChunkFind( demux_t *, const char *, unsigned int * );
76 static void FrameInfo_IMA_ADPCM( demux_t *, unsigned int *, int * );
77 static void FrameInfo_MS_ADPCM ( demux_t *, unsigned int *, int * );
78 static void FrameInfo_PCM ( demux_t *, unsigned int *, int * );
80 static const uint32_t pi_channels_src[] =
81 { WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT,
82 WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY,
83 WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT,
84 WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT, 0 };
85 static const uint32_t pi_channels_in[] =
86 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
87 AOUT_CHAN_CENTER, AOUT_CHAN_LFE,
88 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
89 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, 0 };
90 static const uint32_t pi_channels_out[] =
91 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
92 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
93 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
94 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
96 /*****************************************************************************
97 * Open: check file and initializes structures
98 *****************************************************************************/
99 static int Open( vlc_object_t * p_this )
101 demux_t *p_demux = (demux_t*)p_this;
105 unsigned int i_size, i_extended;
106 const char *psz_name;
108 WAVEFORMATEXTENSIBLE *p_wf_ext = NULL;
109 WAVEFORMATEX *p_wf = NULL;
111 /* Is it a wav file ? */
112 if( stream_Peek( p_demux->s, &p_peek, 12 ) < 12 ) return VLC_EGENERIC;
114 if( memcmp( p_peek, "RIFF", 4 ) || memcmp( &p_peek[8], "WAVE", 4 ) )
119 p_demux->pf_demux = Demux;
120 p_demux->pf_control = Control;
121 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
126 p_sys->b_chan_reorder = 0;
127 p_sys->i_channel_mask = 0;
129 /* skip riff header */
130 stream_Read( p_demux->s, NULL, 12 ); /* cannot fail as peek succeed */
132 /* search fmt chunk */
133 if( ChunkFind( p_demux, "fmt ", &i_size ) )
135 msg_Err( p_demux, "cannot find 'fmt ' chunk" );
138 if( i_size < sizeof( WAVEFORMATEX ) - 2 ) /* XXX -2 isn't a typo */
140 msg_Err( p_demux, "invalid 'fmt ' chunk" );
143 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
145 /* load waveformatex */
146 p_wf_ext = malloc( __EVEN( i_size ) + 2 );
147 if( p_wf_ext == NULL )
150 p_wf = (WAVEFORMATEX *)p_wf_ext;
152 if( stream_Read( p_demux->s,
153 p_wf, __EVEN( i_size ) ) < (int)__EVEN( i_size ) )
155 msg_Err( p_demux, "cannot load 'fmt ' chunk" );
159 es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
160 wf_tag_to_fourcc( GetWLE( &p_wf->wFormatTag ), &p_sys->fmt.i_codec,
162 p_sys->fmt.audio.i_channels = GetWLE ( &p_wf->nChannels );
163 p_sys->fmt.audio.i_rate = GetDWLE( &p_wf->nSamplesPerSec );
164 p_sys->fmt.audio.i_blockalign = GetWLE( &p_wf->nBlockAlign );
165 p_sys->fmt.i_bitrate = GetDWLE( &p_wf->nAvgBytesPerSec ) * 8;
166 p_sys->fmt.audio.i_bitspersample = GetWLE( &p_wf->wBitsPerSample );
167 p_sys->fmt.i_extra = GetWLE( &p_wf->cbSize );
170 /* Handle new WAVE_FORMAT_EXTENSIBLE wav files */
171 /* see the following link for more information:
172 * http://www.microsoft.com/whdc/device/audio/multichaud.mspx#EFAA */
173 if( GetWLE( &p_wf->wFormatTag ) == WAVE_FORMAT_EXTENSIBLE &&
174 i_size >= sizeof( WAVEFORMATEXTENSIBLE ) )
176 unsigned i, i_channel_mask;
179 guid_subformat = p_wf_ext->SubFormat;
180 guid_subformat.Data1 = GetDWLE( &p_wf_ext->SubFormat.Data1 );
181 guid_subformat.Data2 = GetWLE( &p_wf_ext->SubFormat.Data2 );
182 guid_subformat.Data3 = GetWLE( &p_wf_ext->SubFormat.Data3 );
184 sf_tag_to_fourcc( &guid_subformat, &p_sys->fmt.i_codec, &psz_name );
186 i_extended = sizeof( WAVEFORMATEXTENSIBLE ) - sizeof( WAVEFORMATEX );
187 p_sys->fmt.i_extra -= i_extended;
189 i_channel_mask = GetDWLE( &p_wf_ext->dwChannelMask );
192 for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
194 if( i_channel_mask & pi_channels_src[i] )
195 p_sys->i_channel_mask |= pi_channels_in[i];
198 if( p_sys->fmt.i_codec == VLC_FOURCC('a','r','a','w') ||
199 p_sys->fmt.i_codec == VLC_FOURCC('p','c','m',' ') ||
200 p_sys->fmt.i_codec == VLC_FOURCC('a','f','l','t') )
202 p_sys->b_chan_reorder =
203 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
204 p_sys->i_channel_mask,
205 p_sys->fmt.audio.i_channels,
206 p_sys->pi_chan_table );
208 msg_Dbg( p_demux, "channel mask: %x, reordering: %i",
209 p_sys->i_channel_mask, (int)p_sys->b_chan_reorder );
211 p_sys->fmt.audio.i_physical_channels =
212 p_sys->fmt.audio.i_original_channels =
213 p_sys->i_channel_mask;
216 if( p_sys->fmt.i_extra > 0 )
218 p_sys->fmt.p_extra = malloc( p_sys->fmt.i_extra );
219 memcpy( p_sys->fmt.p_extra, ((uint8_t *)p_wf) + i_extended,
220 p_sys->fmt.i_extra );
223 msg_Dbg( p_demux, "format: 0x%4.4x, fourcc: %4.4s, channels: %d, "
224 "freq: %d Hz, bitrate: %dKo/s, blockalign: %d, bits/samples: %d, "
226 GetWLE( &p_wf->wFormatTag ), (char *)&p_sys->fmt.i_codec,
227 p_sys->fmt.audio.i_channels, p_sys->fmt.audio.i_rate,
228 p_sys->fmt.i_bitrate / 8 / 1024, p_sys->fmt.audio.i_blockalign,
229 p_sys->fmt.audio.i_bitspersample, p_sys->fmt.i_extra );
234 switch( p_sys->fmt.i_codec )
236 case VLC_FOURCC( 'a', 'r', 'a', 'w' ):
237 case VLC_FOURCC( 'a', 'f', 'l', 't' ):
238 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
239 case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
240 case VLC_FOURCC( 'm', 'l', 'a', 'w' ):
241 case VLC_FOURCC( 'p', 'c', 'm', ' ' ):
242 FrameInfo_PCM( p_demux, &p_sys->i_frame_size,
243 &p_sys->i_frame_samples );
245 case VLC_FOURCC( 'm', 's', 0x00, 0x02 ):
246 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
247 &p_sys->i_frame_samples );
249 case VLC_FOURCC( 'm', 's', 0x00, 0x11 ):
250 FrameInfo_IMA_ADPCM( p_demux, &p_sys->i_frame_size,
251 &p_sys->i_frame_samples );
253 case VLC_FOURCC( 'm', 's', 0x00, 0x61 ):
254 case VLC_FOURCC( 'm', 's', 0x00, 0x62 ):
255 /* FIXME not sure at all FIXME */
256 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
257 &p_sys->i_frame_samples );
259 case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
260 case VLC_FOURCC( 'a', '5', '2', ' ' ):
261 /* FIXME set end of area FIXME */
264 msg_Err( p_demux, "unsupported codec (%4.4s)",
265 (char*)&p_sys->fmt.i_codec );
269 msg_Dbg( p_demux, "found %s audio format", psz_name );
271 if( ChunkFind( p_demux, "data", &p_sys->i_data_size ) )
273 msg_Err( p_demux, "cannot find 'data' chunk" );
276 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
277 p_sys->i_data_pos = stream_Tell( p_demux->s );
279 if( p_sys->fmt.i_bitrate <= 0 )
281 p_sys->fmt.i_bitrate = (mtime_t)p_sys->i_frame_size *
282 p_sys->fmt.audio.i_rate * 8 / p_sys->i_frame_samples;
285 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
287 date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
288 date_Set( &p_sys->pts, 1 );
299 /*****************************************************************************
300 * Demux: read packet and send them to decoders
301 *****************************************************************************
302 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
303 *****************************************************************************/
304 static int Demux( demux_t *p_demux )
306 demux_sys_t *p_sys = p_demux->p_sys;
310 i_pos = stream_Tell( p_demux->s );
312 if( p_sys->i_data_size > 0 &&
313 i_pos >= p_sys->i_data_pos + p_sys->i_data_size )
319 if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
321 msg_Warn( p_demux, "cannot read data" );
325 p_block->i_dts = p_block->i_pts =
326 date_Increment( &p_sys->pts, p_sys->i_frame_samples );
329 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
331 /* Do the channel reordering */
332 if( p_sys->b_chan_reorder )
333 aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
334 p_sys->fmt.audio.i_channels,
335 p_sys->pi_chan_table,
336 p_sys->fmt.audio.i_bitspersample );
338 es_out_Send( p_demux->out, p_sys->p_es, p_block );
343 /*****************************************************************************
344 * Close: frees unused data
345 *****************************************************************************/
346 static void Close ( vlc_object_t * p_this )
348 demux_t *p_demux = (demux_t*)p_this;
349 demux_sys_t *p_sys = p_demux->p_sys;
354 /*****************************************************************************
356 *****************************************************************************/
357 static int Control( demux_t *p_demux, int i_query, va_list args )
359 demux_sys_t *p_sys = p_demux->p_sys;
362 if( p_sys->i_data_size > 0 )
364 i_end = p_sys->i_data_pos + p_sys->i_data_size;
367 return demux2_vaControlHelper( p_demux->s, p_sys->i_data_pos, i_end,
368 p_sys->fmt.i_bitrate,
369 p_sys->fmt.audio.i_blockalign,
373 /*****************************************************************************
375 *****************************************************************************/
376 static int ChunkFind( demux_t *p_demux, const char *fcc, unsigned int *pi_size )
384 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
386 msg_Err( p_demux, "cannot peek()" );
390 i_size = GetDWLE( p_peek + 4 );
392 msg_Dbg( p_demux, "chunk: fcc=`%4.4s` size=%d", p_peek, i_size );
394 if( !memcmp( p_peek, fcc, 4 ) )
403 i_size = __EVEN( i_size ) + 8;
404 if( stream_Read( p_demux->s, NULL, i_size ) != i_size )
411 static void FrameInfo_PCM( demux_t *p_demux, unsigned int *pi_size,
414 demux_sys_t *p_sys = p_demux->p_sys;
415 int i_bytes, i_modulo;
417 /* read samples for 50ms of */
418 *pi_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
420 i_bytes = *pi_samples * p_sys->fmt.audio.i_channels *
421 ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
423 if( p_sys->fmt.audio.i_blockalign > 0 )
425 if( ( i_modulo = i_bytes % p_sys->fmt.audio.i_blockalign ) != 0 )
427 i_bytes += p_sys->fmt.audio.i_blockalign - i_modulo;
434 static void FrameInfo_MS_ADPCM( demux_t *p_demux, unsigned int *pi_size,
437 demux_sys_t *p_sys = p_demux->p_sys;
439 *pi_samples = 2 + 2 * ( p_sys->fmt.audio.i_blockalign -
440 7 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
442 *pi_size = p_sys->fmt.audio.i_blockalign;
445 static void FrameInfo_IMA_ADPCM( demux_t *p_demux, unsigned int *pi_size,
448 demux_sys_t *p_sys = p_demux->p_sys;
450 *pi_samples = 2 * ( p_sys->fmt.audio.i_blockalign -
451 4 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
453 *pi_size = p_sys->fmt.audio.i_blockalign;