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[AOUT_CHAN_MAX];
77 static const uint32_t pi_channels_src[] =
78 { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
79 AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
80 AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
81 AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
82 static const uint32_t pi_channels_in[] =
83 { WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT,
84 WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT,
85 WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT,
86 WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY, 0 };
87 static const uint32_t pi_channels_out[] =
88 { WAVE_SPEAKER_FRONT_LEFT, WAVE_SPEAKER_FRONT_RIGHT,
89 WAVE_SPEAKER_FRONT_CENTER, WAVE_SPEAKER_LOW_FREQUENCY,
90 WAVE_SPEAKER_BACK_LEFT, WAVE_SPEAKER_BACK_RIGHT,
91 WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT, 0 };
93 /*****************************************************************************
95 *****************************************************************************/
96 static int Open( vlc_object_t *p_this )
98 sout_mux_t *p_mux = (sout_mux_t*)p_this;
99 sout_mux_sys_t *p_sys;
101 p_mux->pf_control = Control;
102 p_mux->pf_addstream = AddStream;
103 p_mux->pf_delstream = DelStream;
106 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
107 p_sys->b_used = VLC_FALSE;
108 p_sys->b_header = VLC_TRUE;
111 p_sys->b_chan_reorder = 0;
116 /*****************************************************************************
118 *****************************************************************************/
119 static void Close( vlc_object_t * p_this )
121 sout_mux_t *p_mux = (sout_mux_t*)p_this;
122 sout_mux_sys_t *p_sys = p_mux->p_sys;
126 static int Control( sout_mux_t *p_mux, int i_query, va_list args )
133 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
134 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
135 *pb_bool = VLC_FALSE;
138 case MUX_GET_ADD_STREAM_WAIT:
139 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
144 ppsz = (char**)va_arg( args, char ** );
145 *ppsz = strdup( "audio/wav" );
152 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
154 GUID subformat_guid = {0, 0, 0x10,{0x80, 0, 0, 0xaa, 0, 0x38, 0x9b, 0x71}};
155 sout_mux_sys_t *p_sys = p_mux->p_sys;
156 WAVEFORMATEX *p_waveformat = &p_sys->waveformat.Format;
157 int i_bytes_per_sample, i_format, i;
160 if( p_input->p_fmt->i_cat != AUDIO_ES )
162 msg_Dbg( p_mux, "not an audio stream" );
168 msg_Dbg( p_mux, "can't add more than 1 stream" );
172 msg_Dbg( p_mux, "adding input %i channels, %iHz",
173 p_input->p_fmt->audio.i_channels,
174 p_input->p_fmt->audio.i_rate );
176 p_sys->i_channel_mask = 0;
177 if( p_input->p_fmt->audio.i_physical_channels )
179 for( i = 0; i < sizeof(pi_channels_in)/sizeof(uint32_t); i++ )
181 if( p_input->p_fmt->audio.i_physical_channels & pi_channels_src[i])
182 p_sys->i_channel_mask |= pi_channels_in[i];
185 p_sys->b_chan_reorder =
186 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
187 p_sys->i_channel_mask,
188 p_input->p_fmt->audio.i_channels,
189 p_sys->pi_chan_table );
191 msg_Dbg( p_mux, "channel mask: %x, reordering: %i",
192 p_sys->i_channel_mask, (int)p_sys->b_chan_reorder );
195 i_format = p_input->p_fmt->i_codec == VLC_FOURCC('f', 'l', '3', '2') ?
196 WAVE_FORMAT_IEEE_FLOAT : WAVE_FORMAT_PCM;
197 b_ext = p_sys->b_ext = p_input->p_fmt->audio.i_channels > 2;
199 /* Build a WAV header for the output data */
200 p_sys->waveheader[0] = VLC_FOURCC('R', 'I', 'F', 'F'); /* MainChunkID */
201 SetDWLE( &p_sys->waveheader[1], 0 ); /* Length */
202 p_sys->waveheader[2] = VLC_FOURCC('W', 'A', 'V', 'E'); /* ChunkTypeID */
203 p_sys->waveheader[3] = VLC_FOURCC('f', 'm', 't', ' '); /* SubChunkID */
204 SetDWLE( &p_sys->waveheader[4], b_ext ? 40 : 16 ); /* SubChunkLength */
206 p_sys->waveheader2[0] = VLC_FOURCC('d', 'a', 't', 'a'); /* DataChunkID */
207 SetDWLE( &p_sys->waveheader2[1], 0 ); /* DataLength */
209 /* Build a WAVEVFORMAT header for the output data */
210 memset( &p_sys->waveformat, 0, sizeof(WAVEFORMATEXTENSIBLE) );
211 SetWLE( &p_waveformat->wFormatTag,
212 b_ext ? WAVE_FORMAT_EXTENSIBLE : i_format );
213 SetWLE( &p_waveformat->nChannels,
214 p_input->p_fmt->audio.i_channels );
215 SetDWLE( &p_waveformat->nSamplesPerSec, p_input->p_fmt->audio.i_rate );
216 i_bytes_per_sample = p_input->p_fmt->audio.i_channels *
217 p_input->p_fmt->audio.i_bitspersample / 8;
218 SetDWLE( &p_waveformat->nAvgBytesPerSec,
219 i_bytes_per_sample * p_input->p_fmt->audio.i_rate );
220 SetWLE( &p_waveformat->nBlockAlign, i_bytes_per_sample );
221 SetWLE( &p_waveformat->wBitsPerSample,
222 p_input->p_fmt->audio.i_bitspersample );
223 SetWLE( &p_waveformat->cbSize, 22 );
224 SetWLE( &p_sys->waveformat.Samples.wValidBitsPerSample,
225 p_input->p_fmt->audio.i_bitspersample );
226 SetDWLE( &p_sys->waveformat.dwChannelMask,
227 p_sys->i_channel_mask );
228 p_sys->waveformat.SubFormat = subformat_guid;
229 p_sys->waveformat.SubFormat.Data1 = i_format;
232 p_sys->b_used = VLC_TRUE;
237 static block_t *GetHeader( sout_mux_t *p_mux )
239 sout_mux_sys_t *p_sys = p_mux->p_sys;
241 block_New( p_mux, sizeof( WAVEFORMATEXTENSIBLE ) + 7 * 4 );
243 SetDWLE( &p_sys->waveheader[1],
244 20 + (p_sys->b_ext ? 40 : 16) + p_sys->i_data ); /* Length */
245 SetDWLE( &p_sys->waveheader2[1], p_sys->i_data ); /* DataLength */
247 memcpy( p_block->p_buffer, &p_sys->waveheader, 5 * 4 );
248 memcpy( p_block->p_buffer + 5 * 4, &p_sys->waveformat,
249 sizeof( WAVEFORMATEXTENSIBLE ) );
250 memcpy( p_block->p_buffer + 5 * 4 +
251 (p_sys->b_ext ? sizeof( WAVEFORMATEXTENSIBLE ) : 16),
252 &p_sys->waveheader2, 2 * 4 );
253 if( !p_sys->b_ext ) p_block->i_buffer -= 24;
257 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
259 msg_Dbg( p_mux, "removing input" );
261 msg_Dbg( p_mux, "writing header data" );
262 if( !sout_AccessOutSeek( p_mux->p_access, 0 ) )
264 sout_AccessOutWrite( p_mux->p_access, GetHeader( p_mux ) );
270 static int Mux( sout_mux_t *p_mux )
272 sout_mux_sys_t *p_sys = p_mux->p_sys;
273 sout_input_t *p_input;
275 if( !p_mux->i_nb_inputs ) return VLC_SUCCESS;
277 if( p_sys->b_header )
279 msg_Dbg( p_mux, "writing header data" );
280 sout_AccessOutWrite( p_mux->p_access, GetHeader( p_mux ) );
282 p_sys->b_header = VLC_FALSE;
284 p_input = p_mux->pp_inputs[0];
285 while( p_input->p_fifo->i_depth > 0 )
287 block_t *p_block = block_FifoGet( p_input->p_fifo );
288 p_sys->i_data += p_block->i_buffer;
290 /* Do the channel reordering */
291 if( p_sys->b_chan_reorder )
292 aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
293 p_input->p_fmt->audio.i_channels,
294 p_sys->pi_chan_table,
295 p_input->p_fmt->audio.i_bitspersample );
297 sout_AccessOutWrite( p_mux->p_access, p_block );