1 /*****************************************************************************
2 * wav.c: wav muxer module for vlc
3 *****************************************************************************
4 * Copyright (C) 2004 VideoLAN
7 * Authors: Gildas Bazin <gbazin@videolan.org>
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 *****************************************************************************/
35 /*****************************************************************************
37 *****************************************************************************/
38 static int Open ( vlc_object_t * );
39 static void Close ( vlc_object_t * );
42 set_description( _("WAV muxer") );
43 set_capability( "sout mux", 5 );
44 set_callbacks( Open, Close );
45 add_shortcut( "wav" );
48 /*****************************************************************************
50 *****************************************************************************/
51 static int Control ( sout_mux_t *, int, va_list );
52 static int AddStream( sout_mux_t *, sout_input_t * );
53 static int DelStream( sout_mux_t *, sout_input_t * );
54 static int Mux ( sout_mux_t * );
56 #define MAX_CHANNELS 6
66 /* Wave header for the output data */
67 uint32_t waveheader[5];
68 WAVEFORMATEXTENSIBLE waveformat;
69 uint32_t waveheader2[2];
71 uint32_t i_channel_mask;
72 vlc_bool_t b_chan_reorder; /* do we need channel reordering */
73 int pi_chan_table[MAX_CHANNELS];
77 static const uint32_t pi_channels_in[] =
78 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
79 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
80 AOUT_CHAN_CENTER, AOUT_CHAN_LFE };
81 static const uint32_t pi_channels_out[] =
82 { WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT,
83 WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT,
84 WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY };
85 static const uint32_t pi_channels_ordered[] =
86 { WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT,
87 WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY,
88 WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT };
90 static void CheckReordering( sout_mux_t *p_mux, int i_nb_channels );
91 static void InterleaveS16( int16_t *p_buf, int i_buf, int *pi_chan_table,
93 static void InterleaveFloat32( float *p_buf, int i_buf, int *pi_chan_table,
96 /*****************************************************************************
98 *****************************************************************************/
99 static int Open( vlc_object_t *p_this )
101 sout_mux_t *p_mux = (sout_mux_t*)p_this;
102 sout_mux_sys_t *p_sys;
104 p_mux->pf_control = Control;
105 p_mux->pf_addstream = AddStream;
106 p_mux->pf_delstream = DelStream;
109 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
110 p_sys->b_used = VLC_FALSE;
111 p_sys->b_header = VLC_TRUE;
114 p_sys->b_chan_reorder = 0;
119 /*****************************************************************************
121 *****************************************************************************/
122 static void Close( vlc_object_t * p_this )
124 sout_mux_t *p_mux = (sout_mux_t*)p_this;
125 sout_mux_sys_t *p_sys = p_mux->p_sys;
129 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
136 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
137 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
138 *pb_bool = VLC_FALSE;
141 case MUX_GET_ADD_STREAM_WAIT:
142 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
147 ppsz = (char**)va_arg( args, char ** );
148 *ppsz = strdup( "audio/wav" );
155 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
157 GUID subformat_guid = {0, 0, 0x10,{0x80, 0, 0, 0xaa, 0, 0x38, 0x9b, 0x71}};
158 sout_mux_sys_t *p_sys = p_mux->p_sys;
159 WAVEFORMATEX *p_waveformat = &p_sys->waveformat.Format;
160 int i_bytes_per_sample, i_format, i;
163 if( p_input->p_fmt->i_cat != AUDIO_ES )
165 msg_Dbg( p_mux, "not an audio stream" );
171 msg_Dbg( p_mux, "can't add more than 1 stream" );
175 msg_Dbg( p_mux, "adding input %i channels, %iHz",
176 p_input->p_fmt->audio.i_channels,
177 p_input->p_fmt->audio.i_rate );
179 p_sys->i_channel_mask = 0;
180 if( p_input->p_fmt->audio.i_physical_channels )
182 for( i = 0; i < sizeof(pi_channels_in)/sizeof(uint32_t); i++ )
184 if( p_input->p_fmt->audio.i_physical_channels & pi_channels_in[i] )
185 p_sys->i_channel_mask |= pi_channels_out[i];
187 msg_Dbg( p_mux, "channel mask: %x", p_sys->i_channel_mask );
188 CheckReordering( p_mux, p_input->p_fmt->audio.i_channels );
191 i_format = p_input->p_fmt->i_codec == VLC_FOURCC('f', 'l', '3', '2') ?
192 WAVE_FORMAT_IEEE_FLOAT : WAVE_FORMAT_PCM;
193 b_ext = p_sys->b_ext = p_input->p_fmt->audio.i_channels > 2;
195 /* Build a WAV header for the output data */
196 p_sys->waveheader[0] = VLC_FOURCC('R', 'I', 'F', 'F'); /* MainChunkID */
197 SetDWLE( &p_sys->waveheader[1], 0 ); /* Length */
198 p_sys->waveheader[2] = VLC_FOURCC('W', 'A', 'V', 'E'); /* ChunkTypeID */
199 p_sys->waveheader[3] = VLC_FOURCC('f', 'm', 't', ' '); /* SubChunkID */
200 SetDWLE( &p_sys->waveheader[4], b_ext ? 40 : 16 ); /* SubChunkLength */
202 p_sys->waveheader2[0] = VLC_FOURCC('d', 'a', 't', 'a'); /* DataChunkID */
203 SetDWLE( &p_sys->waveheader2[1], 0 ); /* DataLength */
205 /* Build a WAVEVFORMAT header for the output data */
206 memset( &p_sys->waveformat, 0, sizeof(WAVEFORMATEXTENSIBLE) );
207 SetWLE( &p_waveformat->wFormatTag,
208 b_ext ? WAVE_FORMAT_EXTENSIBLE : i_format );
209 SetWLE( &p_waveformat->nChannels,
210 p_input->p_fmt->audio.i_channels );
211 SetDWLE( &p_waveformat->nSamplesPerSec, p_input->p_fmt->audio.i_rate );
212 i_bytes_per_sample = p_input->p_fmt->audio.i_channels *
213 p_input->p_fmt->audio.i_bitspersample / 8;
214 SetDWLE( &p_waveformat->nAvgBytesPerSec,
215 i_bytes_per_sample * p_input->p_fmt->audio.i_rate );
216 SetWLE( &p_waveformat->nBlockAlign, i_bytes_per_sample );
217 SetWLE( &p_waveformat->wBitsPerSample,
218 p_input->p_fmt->audio.i_bitspersample );
219 SetWLE( &p_waveformat->cbSize, 22 );
220 SetWLE( &p_sys->waveformat.Samples.wValidBitsPerSample,
221 p_input->p_fmt->audio.i_bitspersample );
222 SetDWLE( &p_sys->waveformat.dwChannelMask,
223 p_sys->i_channel_mask );
224 p_sys->waveformat.SubFormat = subformat_guid;
225 p_sys->waveformat.SubFormat.Data1 = i_format;
228 p_sys->b_used = VLC_TRUE;
233 static block_t *GetHeader( sout_mux_t *p_mux )
235 sout_mux_sys_t *p_sys = p_mux->p_sys;
237 block_New( p_mux, sizeof( WAVEFORMATEXTENSIBLE ) + 7 * 4 );
239 SetDWLE( &p_sys->waveheader[1],
240 20 + (p_sys->b_ext ? 40 : 16) + p_sys->i_data ); /* Length */
241 SetDWLE( &p_sys->waveheader2[1], p_sys->i_data ); /* DataLength */
243 memcpy( p_block->p_buffer, &p_sys->waveheader, 5 * 4 );
244 memcpy( p_block->p_buffer + 5 * 4, &p_sys->waveformat,
245 sizeof( WAVEFORMATEXTENSIBLE ) );
246 memcpy( p_block->p_buffer + 5 * 4 +
247 (p_sys->b_ext ? sizeof( WAVEFORMATEXTENSIBLE ) : 16),
248 &p_sys->waveheader2, 2 * 4 );
249 if( !p_sys->b_ext ) p_block->i_buffer -= 24;
253 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
255 msg_Dbg( p_mux, "removing input" );
257 msg_Dbg( p_mux, "writing header data" );
258 if( !sout_AccessOutSeek( p_mux->p_access, 0 ) )
260 sout_AccessOutWrite( p_mux->p_access, GetHeader( p_mux ) );
266 static int Mux( sout_mux_t *p_mux )
268 sout_mux_sys_t *p_sys = p_mux->p_sys;
269 sout_input_t *p_input;
271 if( !p_mux->i_nb_inputs ) return VLC_SUCCESS;
273 if( p_sys->b_header )
275 msg_Dbg( p_mux, "writing header data" );
276 sout_AccessOutWrite( p_mux->p_access, GetHeader( p_mux ) );
278 p_sys->b_header = VLC_FALSE;
280 p_input = p_mux->pp_inputs[0];
281 while( p_input->p_fifo->i_depth > 0 )
283 block_t *p_block = block_FifoGet( p_input->p_fifo );
284 p_sys->i_data += p_block->i_buffer;
286 /* Do the channel reordering */
287 if( p_sys->b_chan_reorder )
289 if( p_input->p_fmt->i_codec == VLC_FOURCC('s','1','6','l') )
290 InterleaveS16( (int16_t *)p_block->p_buffer,
291 p_block->i_buffer, p_sys->pi_chan_table,
292 p_input->p_fmt->audio.i_channels );
293 else if( p_input->p_fmt->i_codec == VLC_FOURCC('f','l','3','2') )
294 InterleaveFloat32( (float *)p_block->p_buffer,
295 p_block->i_buffer, p_sys->pi_chan_table,
296 p_input->p_fmt->audio.i_channels );
299 sout_AccessOutWrite( p_mux->p_access, p_block );
305 /*****************************************************************************
306 * CheckReordering: Check if we need to do some channel re-ordering
307 * (our channel order is different from the one chosen by Microsoft).
308 *****************************************************************************/
309 static void CheckReordering( sout_mux_t *p_mux, int i_nb_channels )
311 sout_mux_sys_t *p_sys = p_mux->p_sys;
314 p_sys->b_chan_reorder = VLC_FALSE;
317 i < (int)(sizeof(pi_channels_out)/sizeof(uint32_t)); i++ )
319 if( p_sys->i_channel_mask & pi_channels_out[i] )
322 pi_channels_out[i] != pi_channels_ordered[k]; k++ )
324 if( p_sys->i_channel_mask & pi_channels_ordered[k] )
330 p_sys->pi_chan_table[j] = l;
336 for( i = 0; i < i_nb_channels; i++ )
338 if( p_sys->pi_chan_table[i] != i ) p_sys->b_chan_reorder = VLC_TRUE;
341 if( p_sys->b_chan_reorder ) msg_Dbg( p_mux, "channel reordering needed" );
344 /*****************************************************************************
345 * InterleaveFloat32/S16: change the channel order to the Microsoft one.
346 *****************************************************************************/
347 static void InterleaveFloat32( float *p_buf, int i_buf, int *pi_chan_table,
351 float p_tmp[MAX_CHANNELS];
353 for( i = 0; i < i_buf / i_nb_channels / sizeof(float); i++ )
355 for( j = 0; j < i_nb_channels; j++ )
357 p_tmp[pi_chan_table[j]] = p_buf[i*i_nb_channels + j];
360 memcpy( &p_buf[i*i_nb_channels], p_tmp,
361 i_nb_channels * sizeof(float) );
365 static void InterleaveS16( int16_t *p_buf, int i_buf, int *pi_chan_table,
369 int16_t p_tmp[MAX_CHANNELS];
371 for( i = 0; i < i_buf / i_nb_channels / sizeof(int16_t); i++ )
373 for( j = 0; j < i_nb_channels; j++ )
375 p_tmp[pi_chan_table[j]] = p_buf[i*i_nb_channels + j];
378 memcpy( &p_buf[i*i_nb_channels], p_tmp,
379 i_nb_channels * sizeof(int16_t) );