1 /*****************************************************************************
2 * wav.c: wav muxer module for vlc
3 *****************************************************************************
4 * Copyright (C) 2004, 2006 the VideoLAN team
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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
36 #include <vlc_block.h>
37 #include <vlc_codecs.h>
39 /*****************************************************************************
41 *****************************************************************************/
42 static int Open ( vlc_object_t * );
43 static void Close ( vlc_object_t * );
46 set_description( N_("WAV muxer") )
47 set_capability( "sout mux", 5 )
48 set_category( CAT_SOUT )
49 set_subcategory( SUBCAT_SOUT_MUX )
50 set_callbacks( Open, Close )
54 /*****************************************************************************
56 *****************************************************************************/
57 static int Control ( sout_mux_t *, int, va_list );
58 static int AddStream( sout_mux_t *, sout_input_t * );
59 static int DelStream( sout_mux_t *, sout_input_t * );
60 static int Mux ( sout_mux_t * );
62 #define MAX_CHANNELS 6
72 /* Wave header for the output data */
73 uint32_t waveheader[5];
74 WAVEFORMATEXTENSIBLE waveformat;
75 uint32_t waveheader2[2];
77 uint32_t i_channel_mask;
78 bool b_chan_reorder; /* do we need channel reordering */
79 int pi_chan_table[AOUT_CHAN_MAX];
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, WAVE_SPEAKER_BACK_CENTER,
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_BACK_CENTER,
92 WAVE_SPEAKER_SIDE_LEFT, WAVE_SPEAKER_SIDE_RIGHT, 0 };
94 /*****************************************************************************
96 *****************************************************************************/
97 static int Open( vlc_object_t *p_this )
99 sout_mux_t *p_mux = (sout_mux_t*)p_this;
100 sout_mux_sys_t *p_sys;
102 p_mux->pf_control = Control;
103 p_mux->pf_addstream = AddStream;
104 p_mux->pf_delstream = DelStream;
107 p_mux->p_sys = p_sys = malloc( sizeof( sout_mux_sys_t ) );
110 p_sys->b_used = false;
111 p_sys->b_header = 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 )
137 case MUX_CAN_ADD_STREAM_WHILE_MUXING:
138 pb_bool = (bool*)va_arg( args, bool * );
142 case MUX_GET_ADD_STREAM_WAIT:
143 pb_bool = (bool*)va_arg( args, bool * );
148 ppsz = (char**)va_arg( args, char ** );
149 *ppsz = strdup( "audio/wav" );
156 static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
158 GUID subformat_guid = {0, 0, 0x10,{0x80, 0, 0, 0xaa, 0, 0x38, 0x9b, 0x71}};
159 sout_mux_sys_t *p_sys = p_mux->p_sys;
160 WAVEFORMATEX *p_waveformat = &p_sys->waveformat.Format;
161 int i_bytes_per_sample;
165 if( p_input->p_fmt->i_cat != AUDIO_ES )
167 msg_Dbg( p_mux, "not an audio stream" );
173 msg_Dbg( p_mux, "can't add more than 1 stream" );
177 msg_Dbg( p_mux, "adding %i input channels, %iHz",
178 p_input->p_fmt->audio.i_channels,
179 p_input->p_fmt->audio.i_rate );
181 p_sys->i_channel_mask = 0;
182 if( p_input->p_fmt->audio.i_physical_channels )
184 for( unsigned i = 0; i < pi_vlc_chan_order_wg4[i]; i++ )
185 if( p_input->p_fmt->audio.i_physical_channels & pi_vlc_chan_order_wg4[i])
186 p_sys->i_channel_mask |= pi_channels_in[i];
188 p_sys->b_chan_reorder =
189 aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
190 p_sys->i_channel_mask,
191 p_input->p_fmt->audio.i_channels,
192 p_sys->pi_chan_table );
194 msg_Dbg( p_mux, "channel mask: %x, reordering: %i",
195 p_sys->i_channel_mask, (int)p_sys->b_chan_reorder );
198 fourcc_to_wf_tag( p_input->p_fmt->i_codec, &i_format );
199 b_ext = p_sys->b_ext = p_input->p_fmt->audio.i_channels > 2;
201 /* Build a WAV header for the output data */
202 p_sys->waveheader[0] = VLC_FOURCC('R', 'I', 'F', 'F'); /* MainChunkID */
203 SetDWLE( &p_sys->waveheader[1], 0 ); /* Length */
204 p_sys->waveheader[2] = VLC_FOURCC('W', 'A', 'V', 'E'); /* ChunkTypeID */
205 p_sys->waveheader[3] = VLC_FOURCC('f', 'm', 't', ' '); /* SubChunkID */
206 SetDWLE( &p_sys->waveheader[4], b_ext ? 40 : 16 ); /* SubChunkLength */
208 p_sys->waveheader2[0] = VLC_FOURCC('d', 'a', 't', 'a'); /* DataChunkID */
209 SetDWLE( &p_sys->waveheader2[1], 0 ); /* DataLength */
211 /* Build a WAVEVFORMAT header for the output data */
212 memset( &p_sys->waveformat, 0, sizeof(WAVEFORMATEXTENSIBLE) );
213 SetWLE( &p_waveformat->wFormatTag,
214 b_ext ? WAVE_FORMAT_EXTENSIBLE : i_format );
215 SetWLE( &p_waveformat->nChannels,
216 p_input->p_fmt->audio.i_channels );
217 SetDWLE( &p_waveformat->nSamplesPerSec, p_input->p_fmt->audio.i_rate );
218 i_bytes_per_sample = p_input->p_fmt->audio.i_channels *
219 p_input->p_fmt->audio.i_bitspersample / 8;
220 SetDWLE( &p_waveformat->nAvgBytesPerSec,
221 i_bytes_per_sample * p_input->p_fmt->audio.i_rate );
222 SetWLE( &p_waveformat->nBlockAlign, i_bytes_per_sample );
223 SetWLE( &p_waveformat->wBitsPerSample,
224 p_input->p_fmt->audio.i_bitspersample );
225 SetWLE( &p_waveformat->cbSize, 22 );
226 SetWLE( &p_sys->waveformat.Samples.wValidBitsPerSample,
227 p_input->p_fmt->audio.i_bitspersample );
228 SetDWLE( &p_sys->waveformat.dwChannelMask,
229 p_sys->i_channel_mask );
230 p_sys->waveformat.SubFormat = subformat_guid;
231 p_sys->waveformat.SubFormat.Data1 = i_format;
234 p_sys->b_used = true;
239 static block_t *GetHeader( sout_mux_t *p_mux )
241 sout_mux_sys_t *p_sys = p_mux->p_sys;
243 block_New( p_mux, sizeof( WAVEFORMATEXTENSIBLE ) + 7 * 4 );
245 SetDWLE( &p_sys->waveheader[1],
246 20 + (p_sys->b_ext ? 40 : 16) + p_sys->i_data ); /* Length */
247 SetDWLE( &p_sys->waveheader2[1], p_sys->i_data ); /* DataLength */
249 memcpy( p_block->p_buffer, &p_sys->waveheader, 5 * 4 );
250 memcpy( p_block->p_buffer + 5 * 4, &p_sys->waveformat,
251 sizeof( WAVEFORMATEXTENSIBLE ) );
252 memcpy( p_block->p_buffer + 5 * 4 +
253 (p_sys->b_ext ? sizeof( WAVEFORMATEXTENSIBLE ) : 16),
254 &p_sys->waveheader2, 2 * 4 );
255 if( !p_sys->b_ext ) p_block->i_buffer -= 24;
259 static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
262 msg_Dbg( p_mux, "removing input" );
264 msg_Dbg( p_mux, "writing header data" );
265 if( sout_AccessOutSeek( p_mux->p_access, 0 ) == VLC_SUCCESS )
267 sout_AccessOutWrite( p_mux->p_access, GetHeader( p_mux ) );
273 static int Mux( sout_mux_t *p_mux )
275 sout_mux_sys_t *p_sys = p_mux->p_sys;
276 sout_input_t *p_input;
278 if( !p_mux->i_nb_inputs ) return VLC_SUCCESS;
280 if( p_sys->b_header )
282 msg_Dbg( p_mux, "writing header data" );
283 sout_AccessOutWrite( p_mux->p_access, GetHeader( p_mux ) );
285 p_sys->b_header = false;
287 p_input = p_mux->pp_inputs[0];
288 while( block_FifoCount( p_input->p_fifo ) > 0 )
290 block_t *p_block = block_FifoGet( p_input->p_fifo );
291 p_sys->i_data += p_block->i_buffer;
293 /* Do the channel reordering */
294 if( p_sys->b_chan_reorder )
295 aout_ChannelReorder( p_block->p_buffer, p_block->i_buffer,
296 p_input->p_fmt->audio.i_channels,
297 p_sys->pi_chan_table,
298 p_input->p_fmt->audio.i_bitspersample );
300 sout_AccessOutWrite( p_mux->p_access, p_block );