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, 0 };
83 static const uint32_t pi_channels_in[] =
84 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
85 AOUT_CHAN_CENTER, AOUT_CHAN_LFE,
86 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, 0 };
87 static const uint32_t pi_channels_out[] =
88 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
89 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
90 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
92 /*****************************************************************************
93 * Open: check file and initializes structures
94 *****************************************************************************/
95 static int Open( vlc_object_t * p_this )
97 demux_t *p_demux = (demux_t*)p_this;
101 unsigned int i_size, i_extended;
104 WAVEFORMATEXTENSIBLE *p_wf_ext;
107 /* Is it a wav file ? */
108 if( stream_Peek( p_demux->s, &p_peek, 12 ) < 12 )
110 msg_Warn( p_demux, "WAV module discarded (cannot peek)" );
113 if( strncmp( p_peek, "RIFF", 4 ) || strncmp( &p_peek[8], "WAVE", 4 ) )
118 p_demux->pf_demux = Demux;
119 p_demux->pf_control = Control;
120 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
122 p_sys->b_chan_reorder = 0;
123 p_sys->i_channel_mask = 0;
125 /* skip riff header */
126 stream_Read( p_demux->s, NULL, 12 ); /* cannot fail as peek succeed */
128 /* search fmt chunk */
129 if( ChunkFind( p_demux, "fmt ", &i_size ) )
131 msg_Err( p_demux, "cannot find 'fmt ' chunk" );
134 if( i_size < sizeof( WAVEFORMATEX ) - 2 ) /* XXX -2 isn't a typo */
136 msg_Err( p_demux, "invalid 'fmt ' chunk" );
139 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
141 /* load waveformatex */
142 p_wf_ext = malloc( __EVEN( i_size ) + 2 );
143 p_wf = (WAVEFORMATEX *)p_wf_ext;
145 if( stream_Read( p_demux->s,
146 p_wf, __EVEN( i_size ) ) < (int)__EVEN( i_size ) )
148 msg_Err( p_demux, "cannot load 'fmt ' chunk" );
152 es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
153 wf_tag_to_fourcc( GetWLE( &p_wf->wFormatTag ), &p_sys->fmt.i_codec,
155 p_sys->fmt.audio.i_channels = GetWLE ( &p_wf->nChannels );
156 p_sys->fmt.audio.i_rate = GetDWLE( &p_wf->nSamplesPerSec );
157 p_sys->fmt.audio.i_blockalign = GetWLE( &p_wf->nBlockAlign );
158 p_sys->fmt.i_bitrate = GetDWLE( &p_wf->nAvgBytesPerSec ) * 8;
159 p_sys->fmt.audio.i_bitspersample = GetWLE( &p_wf->wBitsPerSample );
160 p_sys->fmt.i_extra = GetWLE( &p_wf->cbSize );
163 /* Handle new WAVE_FORMAT_EXTENSIBLE wav files */
164 if( GetWLE( &p_wf->wFormatTag ) == WAVE_FORMAT_EXTENSIBLE &&
165 i_size >= sizeof( WAVEFORMATEXTENSIBLE ) )
167 int i, i_channel_mask;
169 wf_tag_to_fourcc( GetWLE( &p_wf_ext->SubFormat ),
170 &p_sys->fmt.i_codec, &psz_name );
171 i_extended = sizeof( WAVEFORMATEXTENSIBLE ) - sizeof( WAVEFORMATEX );
172 p_sys->fmt.i_extra -= i_extended;
174 i_channel_mask = GetDWLE( &p_wf_ext->dwChannelMask );
177 for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
179 if( i_channel_mask & pi_channels_src[i] )
180 p_sys->i_channel_mask |= pi_channels_in[i];
183 if( p_sys->fmt.i_codec == VLC_FOURCC('a','r','a','w') ||
184 p_sys->fmt.i_codec == VLC_FOURCC('a','f','l','t') )
186 p_sys->b_chan_reorder =
187 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
188 p_sys->i_channel_mask,
189 p_sys->fmt.audio.i_channels,
190 p_sys->pi_chan_table );
192 msg_Dbg( p_demux, "channel mask: %x, reordering: %i",
193 p_sys->i_channel_mask, (int)p_sys->b_chan_reorder );
195 p_sys->fmt.audio.i_physical_channels =
196 p_sys->fmt.audio.i_original_channels =
197 p_sys->i_channel_mask;
200 if( p_sys->fmt.i_extra > 0 )
202 p_sys->fmt.p_extra = malloc( p_sys->fmt.i_extra );
203 memcpy( p_sys->fmt.p_extra, ((uint8_t *)p_wf) + i_extended,
204 p_sys->fmt.i_extra );
207 msg_Dbg( p_demux, "format: 0x%4.4x, fourcc: %4.4s, channels: %d, "
208 "freq: %d Hz, bitrate: %dKo/s, blockalign: %d, bits/samples: %d, "
210 GetWLE( &p_wf->wFormatTag ), (char *)&p_sys->fmt.i_codec,
211 p_sys->fmt.audio.i_channels, p_sys->fmt.audio.i_rate,
212 p_sys->fmt.i_bitrate / 8 / 1024, p_sys->fmt.audio.i_blockalign,
213 p_sys->fmt.audio.i_bitspersample, p_sys->fmt.i_extra );
217 switch( p_sys->fmt.i_codec )
219 case VLC_FOURCC( 'a', 'r', 'a', 'w' ):
220 case VLC_FOURCC( 'a', 'f', 'l', 't' ):
221 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
222 case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
223 FrameInfo_PCM( p_demux, &p_sys->i_frame_size,
224 &p_sys->i_frame_samples );
226 case VLC_FOURCC( 'm', 's', 0x00, 0x02 ):
227 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
228 &p_sys->i_frame_samples );
230 case VLC_FOURCC( 'm', 's', 0x00, 0x11 ):
231 FrameInfo_IMA_ADPCM( p_demux, &p_sys->i_frame_size,
232 &p_sys->i_frame_samples );
234 case VLC_FOURCC( 'm', 's', 0x00, 0x61 ):
235 case VLC_FOURCC( 'm', 's', 0x00, 0x62 ):
236 /* FIXME not sure at all FIXME */
237 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
238 &p_sys->i_frame_samples );
240 case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
241 case VLC_FOURCC( 'a', '5', '2', ' ' ):
242 /* FIXME set end of area FIXME */
245 msg_Err( p_demux, "unsupported codec (%4.4s)",
246 (char*)&p_sys->fmt.i_codec );
250 msg_Dbg( p_demux, "found %s audio format", psz_name );
252 if( ChunkFind( p_demux, "data", &p_sys->i_data_size ) )
254 msg_Err( p_demux, "cannot find 'data' chunk" );
257 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
258 p_sys->i_data_pos = stream_Tell( p_demux->s );
260 if( p_sys->fmt.i_bitrate <= 0 )
262 p_sys->fmt.i_bitrate = (mtime_t)p_sys->i_frame_size *
263 p_sys->fmt.audio.i_rate * 8 / p_sys->i_frame_samples;
266 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
268 date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
269 date_Set( &p_sys->pts, 1 );
279 /*****************************************************************************
280 * Demux: read packet and send them to decoders
281 *****************************************************************************
282 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
283 *****************************************************************************/
284 static int Demux( demux_t *p_demux )
286 demux_sys_t *p_sys = p_demux->p_sys;
290 i_pos = stream_Tell( p_demux->s );
292 if( p_sys->i_data_size > 0 &&
293 i_pos >= p_sys->i_data_pos + p_sys->i_data_size )
299 if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
301 msg_Warn( p_demux, "cannot read data" );
305 p_block->i_dts = p_block->i_pts =
306 date_Increment( &p_sys->pts, p_sys->i_frame_samples );
309 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
311 /* Do the channel reordering */
312 if( p_sys->b_chan_reorder )
313 aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
314 p_sys->fmt.audio.i_channels,
315 p_sys->pi_chan_table,
316 p_sys->fmt.audio.i_bitspersample );
318 es_out_Send( p_demux->out, p_sys->p_es, p_block );
323 /*****************************************************************************
324 * Close: frees unused data
325 *****************************************************************************/
326 static void Close ( vlc_object_t * p_this )
328 demux_t *p_demux = (demux_t*)p_this;
329 demux_sys_t *p_sys = p_demux->p_sys;
334 /*****************************************************************************
336 *****************************************************************************/
337 static int Control( demux_t *p_demux, int i_query, va_list args )
339 demux_sys_t *p_sys = p_demux->p_sys;
342 if( p_sys->i_data_size > 0 )
344 i_end = p_sys->i_data_pos + p_sys->i_data_size;
347 return demux2_vaControlHelper( p_demux->s, p_sys->i_data_pos, i_end,
348 p_sys->fmt.i_bitrate,
349 p_sys->fmt.audio.i_blockalign,
353 /*****************************************************************************
355 *****************************************************************************/
356 static int ChunkFind( demux_t *p_demux, char *fcc, unsigned int *pi_size )
364 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
366 msg_Err( p_demux, "cannot peek()" );
370 i_size = GetDWLE( p_peek + 4 );
372 msg_Dbg( p_demux, "Chunk: fcc=`%4.4s` size=%d", p_peek, i_size );
374 if( !strncmp( p_peek, fcc, 4 ) )
383 i_size = __EVEN( i_size ) + 8;
384 if( stream_Read( p_demux->s, NULL, i_size ) != i_size )
391 static void FrameInfo_PCM( demux_t *p_demux, unsigned int *pi_size,
394 demux_sys_t *p_sys = p_demux->p_sys;
395 int i_bytes, i_modulo;
397 /* read samples for 50ms of */
398 *pi_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
400 i_bytes = *pi_samples * p_sys->fmt.audio.i_channels *
401 ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
403 if( p_sys->fmt.audio.i_blockalign > 0 )
405 if( ( i_modulo = i_bytes % p_sys->fmt.audio.i_blockalign ) != 0 )
407 i_bytes += p_sys->fmt.audio.i_blockalign - i_modulo;
414 static void FrameInfo_MS_ADPCM( demux_t *p_demux, unsigned int *pi_size,
417 demux_sys_t *p_sys = p_demux->p_sys;
419 *pi_samples = 2 + 2 * ( p_sys->fmt.audio.i_blockalign -
420 7 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
422 *pi_size = p_sys->fmt.audio.i_blockalign;
425 static void FrameInfo_IMA_ADPCM( demux_t *p_demux, unsigned int *pi_size,
428 demux_sys_t *p_sys = p_demux->p_sys;
430 *pi_samples = 2 * ( p_sys->fmt.audio.i_blockalign -
431 4 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
433 *pi_size = p_sys->fmt.audio.i_blockalign;