1 /*****************************************************************************
2 * file.c : audio output which writes the samples to a file
3 *****************************************************************************
4 * Copyright (C) 2002 the VideoLAN team
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
8 * Gildas Bazin <gbazin@netcourrier.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_codecs.h> /* WAVEHEADER */
33 #include <vlc_charset.h>
35 #define FRAME_SIZE 2048
36 #define A52_FRAME_NB 1536
38 /*****************************************************************************
39 * aout_sys_t: audio output method descriptor
40 *****************************************************************************
41 * This structure is part of the audio output thread descriptor.
42 * It describes the direct sound specific properties of an audio device.
43 *****************************************************************************/
47 vlc_bool_t b_add_wav_header;
49 WAVEHEADER waveh; /* Wave header of the output file */
52 #define CHANNELS_MAX 6
53 static int pi_channels_maps[CHANNELS_MAX+1] =
57 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
58 AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
59 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
60 | AOUT_CHAN_REARRIGHT,
61 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
62 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
63 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
64 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE
67 /*****************************************************************************
69 *****************************************************************************/
70 static int Open ( vlc_object_t * );
71 static void Close ( vlc_object_t * );
72 static void Play ( aout_instance_t * );
74 /*****************************************************************************
76 *****************************************************************************/
77 #define FORMAT_TEXT N_("Output format")
78 #define FORMAT_LONGTEXT N_("One of \"u8\", \"s8\", \"u16\", \"s16\", " \
79 "\"u16_le\", \"s16_le\", \"u16_be\", \"s16_be\", \"fixed32\", " \
80 "\"float32\" or \"spdif\"")
81 #define CHANNELS_TEXT N_("Number of output channels")
82 #define CHANNELS_LONGTEXT N_("By default, all the channels of the incoming " \
83 "will be saved but you can restrict the number of channels here.")
85 #define WAV_TEXT N_("Add WAVE header")
86 #define WAV_LONGTEXT N_("Instead of writing a raw file, you can add a WAV " \
87 "header to the file.")
89 static const char *format_list[] = { "u8", "s8", "u16", "s16", "u16_le",
90 "s16_le", "u16_be", "s16_be", "fixed32",
92 static int format_int[] = { VLC_FOURCC('u','8',' ',' '),
93 VLC_FOURCC('s','8',' ',' '),
94 AOUT_FMT_U16_NE, AOUT_FMT_S16_NE,
95 VLC_FOURCC('u','1','6','l'),
96 VLC_FOURCC('s','1','6','l'),
97 VLC_FOURCC('u','1','6','b'),
98 VLC_FOURCC('s','1','6','b'),
99 VLC_FOURCC('f','i','3','2'),
100 VLC_FOURCC('f','l','3','2'),
101 VLC_FOURCC('s','p','i','f') };
103 #define FILE_TEXT N_("Output file")
104 #define FILE_LONGTEXT N_("File to which the audio samples will be written to. (\"-\" for stdout")
107 set_description( _("File audio output") );
108 set_shortname( _("File") );
109 set_category( CAT_AUDIO );
110 set_subcategory( SUBCAT_AUDIO_AOUT );
112 add_string( "audiofile-format", "s16", NULL,
113 FORMAT_TEXT, FORMAT_LONGTEXT, VLC_TRUE );
114 change_string_list( format_list, 0, 0 );
115 add_integer( "audiofile-channels", 0, NULL,
116 CHANNELS_TEXT, CHANNELS_LONGTEXT, VLC_TRUE );
117 add_file( "audiofile-file", "audiofile.wav", NULL, FILE_TEXT,
118 FILE_LONGTEXT, VLC_FALSE );
120 add_bool( "audiofile-wav", 1, NULL, WAV_TEXT, WAV_LONGTEXT, VLC_TRUE );
122 set_capability( "audio output", 0 );
123 add_shortcut( "file" );
124 add_shortcut( "audiofile" );
125 set_callbacks( Open, Close );
128 /*****************************************************************************
129 * Open: open a dummy audio device
130 *****************************************************************************/
131 static int Open( vlc_object_t * p_this )
133 aout_instance_t * p_aout = (aout_instance_t *)p_this;
134 char * psz_name, * psz_format;
135 const char ** ppsz_compare = format_list;
137 int i_channels, i = 0;
139 var_Create( p_this, "audiofile-file", VLC_VAR_STRING|VLC_VAR_DOINHERIT );
140 var_Get( p_this, "audiofile-file", &val );
141 psz_name = val.psz_string;
142 if( !psz_name || !*psz_name )
144 msg_Err( p_aout, "you need to specify an output file name" );
145 if( psz_name ) free( psz_name );
149 /* Allocate structure */
150 p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
151 if( p_aout->output.p_sys == NULL )
153 msg_Err( p_aout, "out of memory" );
157 if( !strcmp( psz_name, "-" ) )
158 p_aout->output.p_sys->p_file = stdout;
160 p_aout->output.p_sys->p_file = utf8_fopen( psz_name, "wb" );
163 if ( p_aout->output.p_sys->p_file == NULL )
165 free( p_aout->output.p_sys );
169 p_aout->output.pf_play = Play;
172 var_Create( p_this, "audiofile-format", VLC_VAR_STRING|VLC_VAR_DOINHERIT );
173 var_Get( p_this, "audiofile-format", &val );
174 psz_format = val.psz_string;
176 while ( *ppsz_compare != NULL )
178 if ( !strncmp( *ppsz_compare, psz_format, strlen(*ppsz_compare) ) )
185 if ( *ppsz_compare == NULL )
187 msg_Err( p_aout, "cannot understand the format string (%s)",
189 if( p_aout->output.p_sys->p_file != stdout )
190 fclose( p_aout->output.p_sys->p_file );
191 free( p_aout->output.p_sys );
195 p_aout->output.output.i_format = format_int[i];
196 if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
198 p_aout->output.i_nb_samples = A52_FRAME_NB;
199 p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
200 p_aout->output.output.i_frame_length = A52_FRAME_NB;
201 aout_VolumeNoneInit( p_aout );
205 p_aout->output.i_nb_samples = FRAME_SIZE;
206 aout_VolumeSoftInit( p_aout );
209 /* Channels number */
210 var_Create( p_this, "audiofile-channels",
211 VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
212 var_Get( p_this, "audiofile-channels", &val );
213 i_channels = val.i_int;
215 if( i_channels > 0 && i_channels <= CHANNELS_MAX )
217 p_aout->output.output.i_physical_channels =
218 pi_channels_maps[i_channels];
222 var_Create( p_this, "audiofile-wav", VLC_VAR_BOOL|VLC_VAR_DOINHERIT );
223 var_Get( p_this, "audiofile-wav", &val );
224 p_aout->output.p_sys->b_add_wav_header = val.b_bool;
226 if( p_aout->output.p_sys->b_add_wav_header )
228 /* Write wave header */
229 WAVEHEADER *wh = &p_aout->output.p_sys->waveh;
231 memset( wh, 0, sizeof(wh) );
233 switch( p_aout->output.output.i_format )
235 case VLC_FOURCC('f','l','3','2'):
236 wh->Format = WAVE_FORMAT_IEEE_FLOAT;
237 wh->BitsPerSample = sizeof(float) * 8;
239 case VLC_FOURCC('u','8',' ',' '):
240 wh->Format = WAVE_FORMAT_PCM;
241 wh->BitsPerSample = 8;
243 case VLC_FOURCC('s','1','6','l'):
245 wh->Format = WAVE_FORMAT_PCM;
246 wh->BitsPerSample = 16;
250 wh->MainChunkID = VLC_FOURCC('R', 'I', 'F', 'F');
251 wh->Length = 0; /* temp, to be filled in as we go */
252 wh->ChunkTypeID = VLC_FOURCC('W', 'A', 'V', 'E');
253 wh->SubChunkID = VLC_FOURCC('f', 'm', 't', ' ');
254 wh->SubChunkLength = 16;
256 wh->Modus = aout_FormatNbChannels( &p_aout->output.output );
257 wh->SampleFreq = p_aout->output.output.i_rate;
258 wh->BytesPerSample = wh->Modus * ( wh->BitsPerSample / 8 );
259 wh->BytesPerSec = wh->BytesPerSample * wh->SampleFreq;
261 wh->DataChunkID = VLC_FOURCC('d', 'a', 't', 'a');
262 wh->DataLength = 0; /* temp, to be filled in as we go */
264 /* Header -> little endian format */
265 SetWLE( &wh->Format, wh->Format );
266 SetWLE( &wh->BitsPerSample, wh->BitsPerSample );
267 SetDWLE( &wh->SubChunkLength, wh->SubChunkLength );
268 SetWLE( &wh->Modus, wh->Modus );
269 SetDWLE( &wh->SampleFreq, wh->SampleFreq );
270 SetWLE( &wh->BytesPerSample, wh->BytesPerSample );
271 SetDWLE( &wh->BytesPerSec, wh->BytesPerSec );
273 if( fwrite( wh, sizeof(WAVEHEADER), 1,
274 p_aout->output.p_sys->p_file ) != 1 )
276 msg_Err( p_aout, "write error (%m)" );
283 /*****************************************************************************
284 * Close: close our file
285 *****************************************************************************/
286 static void Close( vlc_object_t * p_this )
288 aout_instance_t * p_aout = (aout_instance_t *)p_this;
290 msg_Dbg( p_aout, "closing audio file" );
292 if( p_aout->output.p_sys->b_add_wav_header )
294 /* Update Wave Header */
295 p_aout->output.p_sys->waveh.Length =
296 p_aout->output.p_sys->waveh.DataLength + sizeof(WAVEHEADER) - 4;
298 /* Write Wave Header */
299 if( fseek( p_aout->output.p_sys->p_file, 0, SEEK_SET ) )
301 msg_Err( p_aout, "seek error (%m)" );
304 /* Header -> little endian format */
305 SetDWLE( &p_aout->output.p_sys->waveh.Length,
306 p_aout->output.p_sys->waveh.Length );
307 SetDWLE( &p_aout->output.p_sys->waveh.DataLength,
308 p_aout->output.p_sys->waveh.DataLength );
310 if( fwrite( &p_aout->output.p_sys->waveh, sizeof(WAVEHEADER), 1,
311 p_aout->output.p_sys->p_file ) != 1 )
313 msg_Err( p_aout, "write error (%m)" );
317 if( p_aout->output.p_sys->p_file != stdout )
318 fclose( p_aout->output.p_sys->p_file );
319 free( p_aout->output.p_sys );
322 /*****************************************************************************
323 * Play: pretend to play a sound
324 *****************************************************************************/
325 static void Play( aout_instance_t * p_aout )
327 aout_buffer_t * p_buffer;
329 p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
331 if( fwrite( p_buffer->p_buffer, p_buffer->i_nb_bytes, 1,
332 p_aout->output.p_sys->p_file ) != 1 )
334 msg_Err( p_aout, "write error (%m)" );
337 if( p_aout->output.p_sys->b_add_wav_header )
339 /* Update Wave Header */
340 p_aout->output.p_sys->waveh.DataLength += p_buffer->i_nb_bytes;
343 aout_BufferFree( p_buffer );