1 /*****************************************************************************
2 * wav.c : wav file input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2001-2003 VideoLAN
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
30 #include <vlc/input.h>
35 /*****************************************************************************
37 *****************************************************************************/
38 static int Open ( vlc_object_t * );
39 static void Close( vlc_object_t * );
42 set_description( _("WAV demuxer") );
43 set_capability( "demux2", 142 );
44 set_callbacks( Open, Close );
47 /*****************************************************************************
49 *****************************************************************************/
50 static int Demux ( demux_t * );
51 static int Control( demux_t *, int i_query, va_list args );
59 unsigned int i_data_size;
61 unsigned int i_frame_size;
66 uint32_t i_channel_mask;
67 vlc_bool_t b_chan_reorder; /* do we need channel reordering */
68 int pi_chan_table[AOUT_CHAN_MAX];
71 #define __EVEN( x ) ( ( (x)%2 != 0 ) ? ((x)+1) : (x) )
73 static int ChunkFind( demux_t *, char *, unsigned int * );
75 static void FrameInfo_IMA_ADPCM( demux_t *, unsigned int *, int * );
76 static void FrameInfo_MS_ADPCM ( demux_t *, unsigned int *, int * );
77 static void FrameInfo_PCM ( demux_t *, unsigned int *, int * );
79 static const uint32_t pi_channels_src[] =
80 { WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT,
81 WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY,
82 WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT,
83 WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT, 0 };
84 static const uint32_t pi_channels_in[] =
85 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
86 AOUT_CHAN_CENTER, AOUT_CHAN_LFE,
87 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
88 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, 0 };
89 static const uint32_t pi_channels_out[] =
90 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
91 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
92 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
93 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
95 /*****************************************************************************
96 * Open: check file and initializes structures
97 *****************************************************************************/
98 static int Open( vlc_object_t * p_this )
100 demux_t *p_demux = (demux_t*)p_this;
104 unsigned int i_size, i_extended;
107 WAVEFORMATEXTENSIBLE *p_wf_ext;
110 /* Is it a wav file ? */
111 if( stream_Peek( p_demux->s, &p_peek, 12 ) < 12 )
113 msg_Warn( p_demux, "WAV module discarded (cannot peek)" );
116 if( strncmp( p_peek, "RIFF", 4 ) || strncmp( &p_peek[8], "WAVE", 4 ) )
121 p_demux->pf_demux = Demux;
122 p_demux->pf_control = Control;
123 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
125 p_sys->b_chan_reorder = 0;
126 p_sys->i_channel_mask = 0;
128 /* skip riff header */
129 stream_Read( p_demux->s, NULL, 12 ); /* cannot fail as peek succeed */
131 /* search fmt chunk */
132 if( ChunkFind( p_demux, "fmt ", &i_size ) )
134 msg_Err( p_demux, "cannot find 'fmt ' chunk" );
137 if( i_size < sizeof( WAVEFORMATEX ) - 2 ) /* XXX -2 isn't a typo */
139 msg_Err( p_demux, "invalid 'fmt ' chunk" );
142 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
144 /* load waveformatex */
145 p_wf_ext = malloc( __EVEN( i_size ) + 2 );
146 p_wf = (WAVEFORMATEX *)p_wf_ext;
148 if( stream_Read( p_demux->s,
149 p_wf, __EVEN( i_size ) ) < (int)__EVEN( i_size ) )
151 msg_Err( p_demux, "cannot load 'fmt ' chunk" );
155 es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
156 wf_tag_to_fourcc( GetWLE( &p_wf->wFormatTag ), &p_sys->fmt.i_codec,
158 p_sys->fmt.audio.i_channels = GetWLE ( &p_wf->nChannels );
159 p_sys->fmt.audio.i_rate = GetDWLE( &p_wf->nSamplesPerSec );
160 p_sys->fmt.audio.i_blockalign = GetWLE( &p_wf->nBlockAlign );
161 p_sys->fmt.i_bitrate = GetDWLE( &p_wf->nAvgBytesPerSec ) * 8;
162 p_sys->fmt.audio.i_bitspersample = GetWLE( &p_wf->wBitsPerSample );
163 p_sys->fmt.i_extra = GetWLE( &p_wf->cbSize );
166 /* Handle new WAVE_FORMAT_EXTENSIBLE wav files */
167 if( GetWLE( &p_wf->wFormatTag ) == WAVE_FORMAT_EXTENSIBLE &&
168 i_size >= sizeof( WAVEFORMATEXTENSIBLE ) )
170 int i, i_channel_mask;
172 wf_tag_to_fourcc( GetWLE( &p_wf_ext->SubFormat ),
173 &p_sys->fmt.i_codec, &psz_name );
174 i_extended = sizeof( WAVEFORMATEXTENSIBLE ) - sizeof( WAVEFORMATEX );
175 p_sys->fmt.i_extra -= i_extended;
177 i_channel_mask = GetDWLE( &p_wf_ext->dwChannelMask );
180 for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
182 if( i_channel_mask & pi_channels_src[i] )
183 p_sys->i_channel_mask |= pi_channels_in[i];
186 if( p_sys->fmt.i_codec == VLC_FOURCC('a','r','a','w') ||
187 p_sys->fmt.i_codec == VLC_FOURCC('a','f','l','t') )
189 p_sys->b_chan_reorder =
190 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
191 p_sys->i_channel_mask,
192 p_sys->fmt.audio.i_channels,
193 p_sys->pi_chan_table );
195 msg_Dbg( p_demux, "channel mask: %x, reordering: %i",
196 p_sys->i_channel_mask, (int)p_sys->b_chan_reorder );
198 p_sys->fmt.audio.i_physical_channels =
199 p_sys->fmt.audio.i_original_channels =
200 p_sys->i_channel_mask;
203 if( p_sys->fmt.i_extra > 0 )
205 p_sys->fmt.p_extra = malloc( p_sys->fmt.i_extra );
206 memcpy( p_sys->fmt.p_extra, ((uint8_t *)p_wf) + i_extended,
207 p_sys->fmt.i_extra );
210 msg_Dbg( p_demux, "format: 0x%4.4x, fourcc: %4.4s, channels: %d, "
211 "freq: %d Hz, bitrate: %dKo/s, blockalign: %d, bits/samples: %d, "
213 GetWLE( &p_wf->wFormatTag ), (char *)&p_sys->fmt.i_codec,
214 p_sys->fmt.audio.i_channels, p_sys->fmt.audio.i_rate,
215 p_sys->fmt.i_bitrate / 8 / 1024, p_sys->fmt.audio.i_blockalign,
216 p_sys->fmt.audio.i_bitspersample, p_sys->fmt.i_extra );
220 switch( p_sys->fmt.i_codec )
222 case VLC_FOURCC( 'a', 'r', 'a', 'w' ):
223 case VLC_FOURCC( 'a', 'f', 'l', 't' ):
224 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
225 case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
226 FrameInfo_PCM( p_demux, &p_sys->i_frame_size,
227 &p_sys->i_frame_samples );
229 case VLC_FOURCC( 'm', 's', 0x00, 0x02 ):
230 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
231 &p_sys->i_frame_samples );
233 case VLC_FOURCC( 'm', 's', 0x00, 0x11 ):
234 FrameInfo_IMA_ADPCM( p_demux, &p_sys->i_frame_size,
235 &p_sys->i_frame_samples );
237 case VLC_FOURCC( 'm', 's', 0x00, 0x61 ):
238 case VLC_FOURCC( 'm', 's', 0x00, 0x62 ):
239 /* FIXME not sure at all FIXME */
240 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
241 &p_sys->i_frame_samples );
243 case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
244 case VLC_FOURCC( 'a', '5', '2', ' ' ):
245 /* FIXME set end of area FIXME */
248 msg_Err( p_demux, "unsupported codec (%4.4s)",
249 (char*)&p_sys->fmt.i_codec );
253 msg_Dbg( p_demux, "found %s audio format", psz_name );
255 if( ChunkFind( p_demux, "data", &p_sys->i_data_size ) )
257 msg_Err( p_demux, "cannot find 'data' chunk" );
260 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
261 p_sys->i_data_pos = stream_Tell( p_demux->s );
263 if( p_sys->fmt.i_bitrate <= 0 )
265 p_sys->fmt.i_bitrate = (mtime_t)p_sys->i_frame_size *
266 p_sys->fmt.audio.i_rate * 8 / p_sys->i_frame_samples;
269 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
271 date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
272 date_Set( &p_sys->pts, 1 );
282 /*****************************************************************************
283 * Demux: read packet and send them to decoders
284 *****************************************************************************
285 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
286 *****************************************************************************/
287 static int Demux( demux_t *p_demux )
289 demux_sys_t *p_sys = p_demux->p_sys;
293 i_pos = stream_Tell( p_demux->s );
295 if( p_sys->i_data_size > 0 &&
296 i_pos >= p_sys->i_data_pos + p_sys->i_data_size )
302 if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
304 msg_Warn( p_demux, "cannot read data" );
308 p_block->i_dts = p_block->i_pts =
309 date_Increment( &p_sys->pts, p_sys->i_frame_samples );
312 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
314 /* Do the channel reordering */
315 if( p_sys->b_chan_reorder )
316 aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
317 p_sys->fmt.audio.i_channels,
318 p_sys->pi_chan_table,
319 p_sys->fmt.audio.i_bitspersample );
321 es_out_Send( p_demux->out, p_sys->p_es, p_block );
326 /*****************************************************************************
327 * Close: frees unused data
328 *****************************************************************************/
329 static void Close ( vlc_object_t * p_this )
331 demux_t *p_demux = (demux_t*)p_this;
332 demux_sys_t *p_sys = p_demux->p_sys;
337 /*****************************************************************************
339 *****************************************************************************/
340 static int Control( demux_t *p_demux, int i_query, va_list args )
342 demux_sys_t *p_sys = p_demux->p_sys;
345 if( p_sys->i_data_size > 0 )
347 i_end = p_sys->i_data_pos + p_sys->i_data_size;
350 return demux2_vaControlHelper( p_demux->s, p_sys->i_data_pos, i_end,
351 p_sys->fmt.i_bitrate,
352 p_sys->fmt.audio.i_blockalign,
356 /*****************************************************************************
358 *****************************************************************************/
359 static int ChunkFind( demux_t *p_demux, char *fcc, unsigned int *pi_size )
367 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
369 msg_Err( p_demux, "cannot peek()" );
373 i_size = GetDWLE( p_peek + 4 );
375 msg_Dbg( p_demux, "Chunk: fcc=`%4.4s` size=%d", p_peek, i_size );
377 if( !strncmp( p_peek, fcc, 4 ) )
386 i_size = __EVEN( i_size ) + 8;
387 if( stream_Read( p_demux->s, NULL, i_size ) != i_size )
394 static void FrameInfo_PCM( demux_t *p_demux, unsigned int *pi_size,
397 demux_sys_t *p_sys = p_demux->p_sys;
398 int i_bytes, i_modulo;
400 /* read samples for 50ms of */
401 *pi_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
403 i_bytes = *pi_samples * p_sys->fmt.audio.i_channels *
404 ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
406 if( p_sys->fmt.audio.i_blockalign > 0 )
408 if( ( i_modulo = i_bytes % p_sys->fmt.audio.i_blockalign ) != 0 )
410 i_bytes += p_sys->fmt.audio.i_blockalign - i_modulo;
417 static void FrameInfo_MS_ADPCM( demux_t *p_demux, unsigned int *pi_size,
420 demux_sys_t *p_sys = p_demux->p_sys;
422 *pi_samples = 2 + 2 * ( p_sys->fmt.audio.i_blockalign -
423 7 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
425 *pi_size = p_sys->fmt.audio.i_blockalign;
428 static void FrameInfo_IMA_ADPCM( demux_t *p_demux, unsigned int *pi_size,
431 demux_sys_t *p_sys = p_demux->p_sys;
433 *pi_samples = 2 * ( p_sys->fmt.audio.i_blockalign -
434 4 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
436 *pi_size = p_sys->fmt.audio.i_blockalign;