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_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 )
115 msg_Warn( p_demux, "WAV module discarded (cannot peek)" );
118 if( strncmp( p_peek, "RIFF", 4 ) || strncmp( &p_peek[8], "WAVE", 4 ) )
123 p_demux->pf_demux = Demux;
124 p_demux->pf_control = Control;
125 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
127 p_sys->b_chan_reorder = 0;
128 p_sys->i_channel_mask = 0;
130 /* skip riff header */
131 stream_Read( p_demux->s, NULL, 12 ); /* cannot fail as peek succeed */
133 /* search fmt chunk */
134 if( ChunkFind( p_demux, "fmt ", &i_size ) )
136 msg_Err( p_demux, "cannot find 'fmt ' chunk" );
139 if( i_size < sizeof( WAVEFORMATEX ) - 2 ) /* XXX -2 isn't a typo */
141 msg_Err( p_demux, "invalid 'fmt ' chunk" );
144 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
146 /* load waveformatex */
147 p_wf_ext = malloc( __EVEN( i_size ) + 2 );
148 p_wf = (WAVEFORMATEX *)p_wf_ext;
150 if( stream_Read( p_demux->s,
151 p_wf, __EVEN( i_size ) ) < (int)__EVEN( i_size ) )
153 msg_Err( p_demux, "cannot load 'fmt ' chunk" );
157 es_format_Init( &p_sys->fmt, AUDIO_ES, 0 );
158 wf_tag_to_fourcc( GetWLE( &p_wf->wFormatTag ), &p_sys->fmt.i_codec,
160 p_sys->fmt.audio.i_channels = GetWLE ( &p_wf->nChannels );
161 p_sys->fmt.audio.i_rate = GetDWLE( &p_wf->nSamplesPerSec );
162 p_sys->fmt.audio.i_blockalign = GetWLE( &p_wf->nBlockAlign );
163 p_sys->fmt.i_bitrate = GetDWLE( &p_wf->nAvgBytesPerSec ) * 8;
164 p_sys->fmt.audio.i_bitspersample = GetWLE( &p_wf->wBitsPerSample );
165 p_sys->fmt.i_extra = GetWLE( &p_wf->cbSize );
168 /* Handle new WAVE_FORMAT_EXTENSIBLE wav files */
169 if( GetWLE( &p_wf->wFormatTag ) == WAVE_FORMAT_EXTENSIBLE &&
170 i_size >= sizeof( WAVEFORMATEXTENSIBLE ) )
172 int i, i_channel_mask;
174 wf_tag_to_fourcc( GetWLE( &p_wf_ext->SubFormat ),
175 &p_sys->fmt.i_codec, &psz_name );
176 i_extended = sizeof( WAVEFORMATEXTENSIBLE ) - sizeof( WAVEFORMATEX );
177 p_sys->fmt.i_extra -= i_extended;
179 i_channel_mask = GetDWLE( &p_wf_ext->dwChannelMask );
182 for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
184 if( i_channel_mask & pi_channels_src[i] )
185 p_sys->i_channel_mask |= pi_channels_in[i];
188 if( p_sys->fmt.i_codec == VLC_FOURCC('a','r','a','w') ||
189 p_sys->fmt.i_codec == VLC_FOURCC('a','f','l','t') )
191 p_sys->b_chan_reorder =
192 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
193 p_sys->i_channel_mask,
194 p_sys->fmt.audio.i_channels,
195 p_sys->pi_chan_table );
197 msg_Dbg( p_demux, "channel mask: %x, reordering: %i",
198 p_sys->i_channel_mask, (int)p_sys->b_chan_reorder );
200 p_sys->fmt.audio.i_physical_channels =
201 p_sys->fmt.audio.i_original_channels =
202 p_sys->i_channel_mask;
205 if( p_sys->fmt.i_extra > 0 )
207 p_sys->fmt.p_extra = malloc( p_sys->fmt.i_extra );
208 memcpy( p_sys->fmt.p_extra, ((uint8_t *)p_wf) + i_extended,
209 p_sys->fmt.i_extra );
212 msg_Dbg( p_demux, "format: 0x%4.4x, fourcc: %4.4s, channels: %d, "
213 "freq: %d Hz, bitrate: %dKo/s, blockalign: %d, bits/samples: %d, "
215 GetWLE( &p_wf->wFormatTag ), (char *)&p_sys->fmt.i_codec,
216 p_sys->fmt.audio.i_channels, p_sys->fmt.audio.i_rate,
217 p_sys->fmt.i_bitrate / 8 / 1024, p_sys->fmt.audio.i_blockalign,
218 p_sys->fmt.audio.i_bitspersample, p_sys->fmt.i_extra );
222 switch( p_sys->fmt.i_codec )
224 case VLC_FOURCC( 'a', 'r', 'a', 'w' ):
225 case VLC_FOURCC( 'a', 'f', 'l', 't' ):
226 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
227 case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
228 FrameInfo_PCM( p_demux, &p_sys->i_frame_size,
229 &p_sys->i_frame_samples );
231 case VLC_FOURCC( 'm', 's', 0x00, 0x02 ):
232 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
233 &p_sys->i_frame_samples );
235 case VLC_FOURCC( 'm', 's', 0x00, 0x11 ):
236 FrameInfo_IMA_ADPCM( p_demux, &p_sys->i_frame_size,
237 &p_sys->i_frame_samples );
239 case VLC_FOURCC( 'm', 's', 0x00, 0x61 ):
240 case VLC_FOURCC( 'm', 's', 0x00, 0x62 ):
241 /* FIXME not sure at all FIXME */
242 FrameInfo_MS_ADPCM( p_demux, &p_sys->i_frame_size,
243 &p_sys->i_frame_samples );
245 case VLC_FOURCC( 'm', 'p', 'g', 'a' ):
246 case VLC_FOURCC( 'a', '5', '2', ' ' ):
247 /* FIXME set end of area FIXME */
250 msg_Err( p_demux, "unsupported codec (%4.4s)",
251 (char*)&p_sys->fmt.i_codec );
255 msg_Dbg( p_demux, "found %s audio format", psz_name );
257 if( ChunkFind( p_demux, "data", &p_sys->i_data_size ) )
259 msg_Err( p_demux, "cannot find 'data' chunk" );
262 stream_Read( p_demux->s, NULL, 8 ); /* Cannot fail */
263 p_sys->i_data_pos = stream_Tell( p_demux->s );
265 if( p_sys->fmt.i_bitrate <= 0 )
267 p_sys->fmt.i_bitrate = (mtime_t)p_sys->i_frame_size *
268 p_sys->fmt.audio.i_rate * 8 / p_sys->i_frame_samples;
271 p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
273 date_Init( &p_sys->pts, p_sys->fmt.audio.i_rate, 1 );
274 date_Set( &p_sys->pts, 1 );
284 /*****************************************************************************
285 * Demux: read packet and send them to decoders
286 *****************************************************************************
287 * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
288 *****************************************************************************/
289 static int Demux( demux_t *p_demux )
291 demux_sys_t *p_sys = p_demux->p_sys;
295 i_pos = stream_Tell( p_demux->s );
297 if( p_sys->i_data_size > 0 &&
298 i_pos >= p_sys->i_data_pos + p_sys->i_data_size )
304 if( ( p_block = stream_Block( p_demux->s, p_sys->i_frame_size ) ) == NULL )
306 msg_Warn( p_demux, "cannot read data" );
310 p_block->i_dts = p_block->i_pts =
311 date_Increment( &p_sys->pts, p_sys->i_frame_samples );
314 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
316 /* Do the channel reordering */
317 if( p_sys->b_chan_reorder )
318 aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
319 p_sys->fmt.audio.i_channels,
320 p_sys->pi_chan_table,
321 p_sys->fmt.audio.i_bitspersample );
323 es_out_Send( p_demux->out, p_sys->p_es, p_block );
328 /*****************************************************************************
329 * Close: frees unused data
330 *****************************************************************************/
331 static void Close ( vlc_object_t * p_this )
333 demux_t *p_demux = (demux_t*)p_this;
334 demux_sys_t *p_sys = p_demux->p_sys;
339 /*****************************************************************************
341 *****************************************************************************/
342 static int Control( demux_t *p_demux, int i_query, va_list args )
344 demux_sys_t *p_sys = p_demux->p_sys;
347 if( p_sys->i_data_size > 0 )
349 i_end = p_sys->i_data_pos + p_sys->i_data_size;
352 return demux2_vaControlHelper( p_demux->s, p_sys->i_data_pos, i_end,
353 p_sys->fmt.i_bitrate,
354 p_sys->fmt.audio.i_blockalign,
358 /*****************************************************************************
360 *****************************************************************************/
361 static int ChunkFind( demux_t *p_demux, char *fcc, unsigned int *pi_size )
369 if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
371 msg_Err( p_demux, "cannot peek()" );
375 i_size = GetDWLE( p_peek + 4 );
377 msg_Dbg( p_demux, "Chunk: fcc=`%4.4s` size=%d", p_peek, i_size );
379 if( !strncmp( p_peek, fcc, 4 ) )
388 i_size = __EVEN( i_size ) + 8;
389 if( stream_Read( p_demux->s, NULL, i_size ) != i_size )
396 static void FrameInfo_PCM( demux_t *p_demux, unsigned int *pi_size,
399 demux_sys_t *p_sys = p_demux->p_sys;
400 int i_bytes, i_modulo;
402 /* read samples for 50ms of */
403 *pi_samples = __MAX( p_sys->fmt.audio.i_rate / 20, 1 );
405 i_bytes = *pi_samples * p_sys->fmt.audio.i_channels *
406 ( (p_sys->fmt.audio.i_bitspersample + 7) / 8 );
408 if( p_sys->fmt.audio.i_blockalign > 0 )
410 if( ( i_modulo = i_bytes % p_sys->fmt.audio.i_blockalign ) != 0 )
412 i_bytes += p_sys->fmt.audio.i_blockalign - i_modulo;
419 static void FrameInfo_MS_ADPCM( demux_t *p_demux, unsigned int *pi_size,
422 demux_sys_t *p_sys = p_demux->p_sys;
424 *pi_samples = 2 + 2 * ( p_sys->fmt.audio.i_blockalign -
425 7 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
427 *pi_size = p_sys->fmt.audio.i_blockalign;
430 static void FrameInfo_IMA_ADPCM( demux_t *p_demux, unsigned int *pi_size,
433 demux_sys_t *p_sys = p_demux->p_sys;
435 *pi_samples = 2 * ( p_sys->fmt.audio.i_blockalign -
436 4 * p_sys->fmt.audio.i_channels ) / p_sys->fmt.audio.i_channels;
438 *pi_size = p_sys->fmt.audio.i_blockalign;