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., 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_category( CAT_INPUT );
44 set_subcategory( SUBCAT_INPUT_DEMUX );
45 set_capability( "demux2", 142 );
46 set_callbacks( Open, Close );
49 /*****************************************************************************
51 *****************************************************************************/
52 static int Demux ( demux_t * );
53 static int Control( demux_t *, int i_query, va_list args );
61 unsigned int i_data_size;
63 unsigned int i_frame_size;
68 uint32_t i_channel_mask;
69 vlc_bool_t b_chan_reorder; /* do we need channel reordering */
70 int pi_chan_table[AOUT_CHAN_MAX];
73 #define __EVEN( x ) ( ( (x)%2 != 0 ) ? ((x)+1) : (x) )
75 static int ChunkFind( demux_t *, char *, unsigned int * );
77 static void FrameInfo_IMA_ADPCM( demux_t *, unsigned int *, int * );
78 static void FrameInfo_MS_ADPCM ( demux_t *, unsigned int *, int * );
79 static void FrameInfo_PCM ( demux_t *, unsigned int *, int * );
81 static const uint32_t pi_channels_src[] =
82 { WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT,
83 WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY,
84 WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT,
85 WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT, 0 };
86 static const uint32_t pi_channels_in[] =
87 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
88 AOUT_CHAN_CENTER, AOUT_CHAN_LFE,
89 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
90 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, 0 };
91 static const uint32_t pi_channels_out[] =
92 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
93 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
94 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
95 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
97 /*****************************************************************************
98 * Open: check file and initializes structures
99 *****************************************************************************/
100 static int Open( vlc_object_t * p_this )
102 demux_t *p_demux = (demux_t*)p_this;
106 unsigned int i_size, i_extended;
109 WAVEFORMATEXTENSIBLE *p_wf_ext;
112 /* Is it a wav file ? */
113 if( stream_Peek( p_demux->s, &p_peek, 12 ) < 12 ) return VLC_EGENERIC;
115 if( memcmp( p_peek, "RIFF", 4 ) || memcmp( &p_peek[8], "WAVE", 4 ) )
120 p_demux->pf_demux = Demux;
121 p_demux->pf_control = Control;
122 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
124 p_sys->b_chan_reorder = 0;
125 p_sys->i_channel_mask = 0;
127 /* skip riff header */
128 stream_Read( p_demux->s, NULL, 12 ); /* cannot fail as peek succeed */
130 /* search fmt chunk */
131 if( ChunkFind( p_demux, "fmt ", &i_size ) )
133 msg_Err( p_demux, "cannot find 'fmt ' chunk" );
136 if( i_size < sizeof( WAVEFORMATEX ) - 2 ) /* XXX -2 isn't a typo */
138 msg_Err( p_demux, "invalid 'fmt ' chunk" );
141 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
143 /* load waveformatex */
144 p_wf_ext = malloc( __EVEN( i_size ) + 2 );
145 p_wf = (WAVEFORMATEX *)p_wf_ext;
147 if( stream_Read( p_demux->s,
148 p_wf, __EVEN( i_size ) ) < (int)__EVEN( i_size ) )
150 msg_Err( p_demux, "cannot load 'fmt ' chunk" );
154 es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
155 wf_tag_to_fourcc( GetWLE( &p_wf->wFormatTag ), &p_sys->fmt.i_codec,
157 p_sys->fmt.audio.i_channels = GetWLE ( &p_wf->nChannels );
158 p_sys->fmt.audio.i_rate = GetDWLE( &p_wf->nSamplesPerSec );
159 p_sys->fmt.audio.i_blockalign = GetWLE( &p_wf->nBlockAlign );
160 p_sys->fmt.i_bitrate = GetDWLE( &p_wf->nAvgBytesPerSec ) * 8;
161 p_sys->fmt.audio.i_bitspersample = GetWLE( &p_wf->wBitsPerSample );
162 p_sys->fmt.i_extra = GetWLE( &p_wf->cbSize );
165 /* Handle new WAVE_FORMAT_EXTENSIBLE wav files */
166 /* see the following link for more information:
167 * http://www.microsoft.com/whdc/device/audio/multichaud.mspx#EFAA */
168 if( GetWLE( &p_wf->wFormatTag ) == WAVE_FORMAT_EXTENSIBLE &&
169 i_size >= sizeof( WAVEFORMATEXTENSIBLE ) )
171 unsigned i, i_channel_mask;
174 guid_subformat = p_wf_ext->SubFormat;
175 guid_subformat.Data1 = GetDWLE( &p_wf_ext->SubFormat.Data1 );
176 guid_subformat.Data2 = GetWLE( &p_wf_ext->SubFormat.Data2 );
177 guid_subformat.Data3 = GetWLE( &p_wf_ext->SubFormat.Data3 );
179 sf_tag_to_fourcc( &guid_subformat, &p_sys->fmt.i_codec, &psz_name );
181 i_extended = sizeof( WAVEFORMATEXTENSIBLE ) - sizeof( WAVEFORMATEX );
182 p_sys->fmt.i_extra -= i_extended;
184 i_channel_mask = GetDWLE( &p_wf_ext->dwChannelMask );
187 for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
189 if( i_channel_mask & pi_channels_src[i] )
190 p_sys->i_channel_mask |= pi_channels_in[i];
193 if( p_sys->fmt.i_codec == VLC_FOURCC('a','r','a','w') ||
194 p_sys->fmt.i_codec == VLC_FOURCC('a','f','l','t') )
196 p_sys->b_chan_reorder =
197 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
198 p_sys->i_channel_mask,
199 p_sys->fmt.audio.i_channels,
200 p_sys->pi_chan_table );
202 msg_Dbg( p_demux, "channel mask: %x, reordering: %i",
203 p_sys->i_channel_mask, (int)p_sys->b_chan_reorder );
205 p_sys->fmt.audio.i_physical_channels =
206 p_sys->fmt.audio.i_original_channels =
207 p_sys->i_channel_mask;
210 if( p_sys->fmt.i_extra > 0 )
212 p_sys->fmt.p_extra = malloc( p_sys->fmt.i_extra );
213 memcpy( p_sys->fmt.p_extra, ((uint8_t *)p_wf) + i_extended,
214 p_sys->fmt.i_extra );
217 msg_Dbg( p_demux, "format: 0x%4.4x, fourcc: %4.4s, channels: %d, "
218 "freq: %d Hz, bitrate: %dKo/s, blockalign: %d, bits/samples: %d, "
220 GetWLE( &p_wf->wFormatTag ), (char *)&p_sys->fmt.i_codec,
221 p_sys->fmt.audio.i_channels, p_sys->fmt.audio.i_rate,
222 p_sys->fmt.i_bitrate / 8 / 1024, p_sys->fmt.audio.i_blockalign,
223 p_sys->fmt.audio.i_bitspersample, p_sys->fmt.i_extra );
227 switch( p_sys->fmt.i_codec )
229 case VLC_FOURCC( 'a', 'r', 'a', 'w' ):
230 case VLC_FOURCC( 'a', 'f', 'l', 't' ):
231 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
232 case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
233 FrameInfo_PCM( p_demux, &p_sys->i_frame_size,
234 &p_sys->i_frame_samples );
236 case VLC_FOURCC( 'm', 's', 0x00, 0x02 ):
237 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
238 &p_sys->i_frame_samples );
240 case VLC_FOURCC( 'm', 's', 0x00, 0x11 ):
241 FrameInfo_IMA_ADPCM( p_demux, &p_sys->i_frame_size,
242 &p_sys->i_frame_samples );
244 case VLC_FOURCC( 'm', 's', 0x00, 0x61 ):
245 case VLC_FOURCC( 'm', 's', 0x00, 0x62 ):
246 /* FIXME not sure at all FIXME */
247 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
248 &p_sys->i_frame_samples );
250 case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
251 case VLC_FOURCC( 'a', '5', '2', ' ' ):
252 /* FIXME set end of area FIXME */
255 msg_Err( p_demux, "unsupported codec (%4.4s)",
256 (char*)&p_sys->fmt.i_codec );
260 msg_Dbg( p_demux, "found %s audio format", psz_name );
262 if( ChunkFind( p_demux, "data", &p_sys->i_data_size ) )
264 msg_Err( p_demux, "cannot find 'data' chunk" );
267 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
268 p_sys->i_data_pos = stream_Tell( p_demux->s );
270 if( p_sys->fmt.i_bitrate <= 0 )
272 p_sys->fmt.i_bitrate = (mtime_t)p_sys->i_frame_size *
273 p_sys->fmt.audio.i_rate * 8 / p_sys->i_frame_samples;
276 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
278 date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
279 date_Set( &p_sys->pts, 1 );
289 /*****************************************************************************
290 * Demux: read packet and send them to decoders
291 *****************************************************************************
292 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
293 *****************************************************************************/
294 static int Demux( demux_t *p_demux )
296 demux_sys_t *p_sys = p_demux->p_sys;
300 i_pos = stream_Tell( p_demux->s );
302 if( p_sys->i_data_size > 0 &&
303 i_pos >= p_sys->i_data_pos + p_sys->i_data_size )
309 if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
311 msg_Warn( p_demux, "cannot read data" );
315 p_block->i_dts = p_block->i_pts =
316 date_Increment( &p_sys->pts, p_sys->i_frame_samples );
319 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
321 /* Do the channel reordering */
322 if( p_sys->b_chan_reorder )
323 aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
324 p_sys->fmt.audio.i_channels,
325 p_sys->pi_chan_table,
326 p_sys->fmt.audio.i_bitspersample );
328 es_out_Send( p_demux->out, p_sys->p_es, p_block );
333 /*****************************************************************************
334 * Close: frees unused data
335 *****************************************************************************/
336 static void Close ( vlc_object_t * p_this )
338 demux_t *p_demux = (demux_t*)p_this;
339 demux_sys_t *p_sys = p_demux->p_sys;
344 /*****************************************************************************
346 *****************************************************************************/
347 static int Control( demux_t *p_demux, int i_query, va_list args )
349 demux_sys_t *p_sys = p_demux->p_sys;
352 if( p_sys->i_data_size > 0 )
354 i_end = p_sys->i_data_pos + p_sys->i_data_size;
357 return demux2_vaControlHelper( p_demux->s, p_sys->i_data_pos, i_end,
358 p_sys->fmt.i_bitrate,
359 p_sys->fmt.audio.i_blockalign,
363 /*****************************************************************************
365 *****************************************************************************/
366 static int ChunkFind( demux_t *p_demux, char *fcc, unsigned int *pi_size )
374 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
376 msg_Err( p_demux, "cannot peek()" );
380 i_size = GetDWLE( p_peek + 4 );
382 msg_Dbg( p_demux, "Chunk: fcc=`%4.4s` size=%d", p_peek, i_size );
384 if( !memcmp( p_peek, fcc, 4 ) )
393 i_size = __EVEN( i_size ) + 8;
394 if( stream_Read( p_demux->s, NULL, i_size ) != i_size )
401 static void FrameInfo_PCM( demux_t *p_demux, unsigned int *pi_size,
404 demux_sys_t *p_sys = p_demux->p_sys;
405 int i_bytes, i_modulo;
407 /* read samples for 50ms of */
408 *pi_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
410 i_bytes = *pi_samples * p_sys->fmt.audio.i_channels *
411 ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
413 if( p_sys->fmt.audio.i_blockalign > 0 )
415 if( ( i_modulo = i_bytes % p_sys->fmt.audio.i_blockalign ) != 0 )
417 i_bytes += p_sys->fmt.audio.i_blockalign - i_modulo;
424 static void FrameInfo_MS_ADPCM( demux_t *p_demux, unsigned int *pi_size,
427 demux_sys_t *p_sys = p_demux->p_sys;
429 *pi_samples = 2 + 2 * ( p_sys->fmt.audio.i_blockalign -
430 7 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
432 *pi_size = p_sys->fmt.audio.i_blockalign;
435 static void FrameInfo_IMA_ADPCM( demux_t *p_demux, unsigned int *pi_size,
438 demux_sys_t *p_sys = p_demux->p_sys;
440 *pi_samples = 2 * ( p_sys->fmt.audio.i_blockalign -
441 4 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
443 *pi_size = p_sys->fmt.audio.i_blockalign;