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 *****************************************************************************/
36 #include <vlc_codecs.h> /* WAVEHEADER */
37 #include <vlc_charset.h>
39 #define FRAME_SIZE 2048
40 #define A52_FRAME_NB 1536
42 /*****************************************************************************
43 * aout_sys_t: audio output method descriptor
44 *****************************************************************************
45 * This structure is part of the audio output thread descriptor.
46 * It describes the direct sound specific properties of an audio device.
47 *****************************************************************************/
51 vlc_bool_t b_add_wav_header;
53 WAVEHEADER waveh; /* Wave header of the output file */
56 #define CHANNELS_MAX 6
57 static int pi_channels_maps[CHANNELS_MAX+1] =
61 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
62 AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
63 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
64 | AOUT_CHAN_REARRIGHT,
65 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
66 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
67 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
68 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE
71 /*****************************************************************************
73 *****************************************************************************/
74 static int Open ( vlc_object_t * );
75 static void Close ( vlc_object_t * );
76 static void Play ( aout_instance_t * );
78 /*****************************************************************************
80 *****************************************************************************/
81 #define FORMAT_TEXT N_("Output format")
82 #define FORMAT_LONGTEXT N_("One of \"u8\", \"s8\", \"u16\", \"s16\", " \
83 "\"u16_le\", \"s16_le\", \"u16_be\", \"s16_be\", \"fixed32\", " \
84 "\"float32\" or \"spdif\"")
85 #define CHANNELS_TEXT N_("Number of output channels")
86 #define CHANNELS_LONGTEXT N_("By default, all the channels of the incoming " \
87 "will be saved but you can restrict the number of channels here.")
89 #define WAV_TEXT N_("Add WAVE header")
90 #define WAV_LONGTEXT N_("Instead of writing a raw file, you can add a WAV " \
91 "header to the file.")
93 static const char *format_list[] = { "u8", "s8", "u16", "s16", "u16_le",
94 "s16_le", "u16_be", "s16_be", "fixed32",
96 static int format_int[] = { VLC_FOURCC('u','8',' ',' '),
97 VLC_FOURCC('s','8',' ',' '),
98 AOUT_FMT_U16_NE, AOUT_FMT_S16_NE,
99 VLC_FOURCC('u','1','6','l'),
100 VLC_FOURCC('s','1','6','l'),
101 VLC_FOURCC('u','1','6','b'),
102 VLC_FOURCC('s','1','6','b'),
103 VLC_FOURCC('f','i','3','2'),
104 VLC_FOURCC('f','l','3','2'),
105 VLC_FOURCC('s','p','i','f') };
107 #define FILE_TEXT N_("Output file")
108 #define FILE_LONGTEXT N_("File to which the audio samples will be written to. (\"-\" for stdout")
111 set_description( _("File audio output") );
112 set_shortname( _("File") );
113 set_category( CAT_AUDIO );
114 set_subcategory( SUBCAT_AUDIO_AOUT );
116 add_string( "audiofile-format", "s16", NULL,
117 FORMAT_TEXT, FORMAT_LONGTEXT, VLC_TRUE );
118 change_string_list( format_list, 0, 0 );
119 add_integer( "audiofile-channels", 0, NULL,
120 CHANNELS_TEXT, CHANNELS_LONGTEXT, VLC_TRUE );
121 add_file( "audiofile-file", "audiofile.wav", NULL, FILE_TEXT,
122 FILE_LONGTEXT, VLC_FALSE );
124 add_bool( "audiofile-wav", 1, NULL, WAV_TEXT, WAV_LONGTEXT, VLC_TRUE );
126 set_capability( "audio output", 0 );
127 add_shortcut( "file" );
128 add_shortcut( "audiofile" );
129 set_callbacks( Open, Close );
132 /*****************************************************************************
133 * Open: open a dummy audio device
134 *****************************************************************************/
135 static int Open( vlc_object_t * p_this )
137 aout_instance_t * p_aout = (aout_instance_t *)p_this;
138 char * psz_name, * psz_format;
139 const char ** ppsz_compare = format_list;
141 int i_channels, i = 0;
143 var_Create( p_this, "audiofile-file", VLC_VAR_STRING|VLC_VAR_DOINHERIT );
144 var_Get( p_this, "audiofile-file", &val );
145 psz_name = val.psz_string;
146 if( !psz_name || !*psz_name )
148 msg_Err( p_aout, "you need to specify an output file name" );
149 if( psz_name ) free( psz_name );
153 /* Allocate structure */
154 p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
155 if( p_aout->output.p_sys == NULL )
157 msg_Err( p_aout, "out of memory" );
161 if( !strcmp( psz_name, "-" ) )
162 p_aout->output.p_sys->p_file = stdout;
164 p_aout->output.p_sys->p_file = utf8_fopen( psz_name, "wb" );
167 if ( p_aout->output.p_sys->p_file == NULL )
169 free( p_aout->output.p_sys );
173 p_aout->output.pf_play = Play;
176 var_Create( p_this, "audiofile-format", VLC_VAR_STRING|VLC_VAR_DOINHERIT );
177 var_Get( p_this, "audiofile-format", &val );
178 psz_format = val.psz_string;
180 while ( *ppsz_compare != NULL )
182 if ( !strncmp( *ppsz_compare, psz_format, strlen(*ppsz_compare) ) )
189 if ( *ppsz_compare == NULL )
191 msg_Err( p_aout, "cannot understand the format string (%s)",
193 if( p_aout->output.p_sys->p_file != stdout )
194 fclose( p_aout->output.p_sys->p_file );
195 free( p_aout->output.p_sys );
199 p_aout->output.output.i_format = format_int[i];
200 if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
202 p_aout->output.i_nb_samples = A52_FRAME_NB;
203 p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
204 p_aout->output.output.i_frame_length = A52_FRAME_NB;
205 aout_VolumeNoneInit( p_aout );
209 p_aout->output.i_nb_samples = FRAME_SIZE;
210 aout_VolumeSoftInit( p_aout );
213 /* Channels number */
214 var_Create( p_this, "audiofile-channels",
215 VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
216 var_Get( p_this, "audiofile-channels", &val );
217 i_channels = val.i_int;
219 if( i_channels > 0 && i_channels <= CHANNELS_MAX )
221 p_aout->output.output.i_physical_channels =
222 pi_channels_maps[i_channels];
226 var_Create( p_this, "audiofile-wav", VLC_VAR_BOOL|VLC_VAR_DOINHERIT );
227 var_Get( p_this, "audiofile-wav", &val );
228 p_aout->output.p_sys->b_add_wav_header = val.b_bool;
230 if( p_aout->output.p_sys->b_add_wav_header )
232 /* Write wave header */
233 WAVEHEADER *wh = &p_aout->output.p_sys->waveh;
235 memset( wh, 0, sizeof(wh) );
237 switch( p_aout->output.output.i_format )
239 case VLC_FOURCC('f','l','3','2'):
240 wh->Format = WAVE_FORMAT_IEEE_FLOAT;
241 wh->BitsPerSample = sizeof(float) * 8;
243 case VLC_FOURCC('u','8',' ',' '):
244 wh->Format = WAVE_FORMAT_PCM;
245 wh->BitsPerSample = 8;
247 case VLC_FOURCC('s','1','6','l'):
249 wh->Format = WAVE_FORMAT_PCM;
250 wh->BitsPerSample = 16;
254 wh->MainChunkID = VLC_FOURCC('R', 'I', 'F', 'F');
255 wh->Length = 0; /* temp, to be filled in as we go */
256 wh->ChunkTypeID = VLC_FOURCC('W', 'A', 'V', 'E');
257 wh->SubChunkID = VLC_FOURCC('f', 'm', 't', ' ');
258 wh->SubChunkLength = 16;
260 wh->Modus = aout_FormatNbChannels( &p_aout->output.output );
261 wh->SampleFreq = p_aout->output.output.i_rate;
262 wh->BytesPerSample = wh->Modus * ( wh->BitsPerSample / 8 );
263 wh->BytesPerSec = wh->BytesPerSample * wh->SampleFreq;
265 wh->DataChunkID = VLC_FOURCC('d', 'a', 't', 'a');
266 wh->DataLength = 0; /* temp, to be filled in as we go */
268 /* Header -> little endian format */
269 SetWLE( &wh->Format, wh->Format );
270 SetWLE( &wh->BitsPerSample, wh->BitsPerSample );
271 SetDWLE( &wh->SubChunkLength, wh->SubChunkLength );
272 SetWLE( &wh->Modus, wh->Modus );
273 SetDWLE( &wh->SampleFreq, wh->SampleFreq );
274 SetWLE( &wh->BytesPerSample, wh->BytesPerSample );
275 SetDWLE( &wh->BytesPerSec, wh->BytesPerSec );
277 if( fwrite( wh, sizeof(WAVEHEADER), 1,
278 p_aout->output.p_sys->p_file ) != 1 )
280 msg_Err( p_aout, "write error (%m)" );
287 /*****************************************************************************
288 * Close: close our file
289 *****************************************************************************/
290 static void Close( vlc_object_t * p_this )
292 aout_instance_t * p_aout = (aout_instance_t *)p_this;
294 msg_Dbg( p_aout, "closing audio file" );
296 if( p_aout->output.p_sys->b_add_wav_header )
298 /* Update Wave Header */
299 p_aout->output.p_sys->waveh.Length =
300 p_aout->output.p_sys->waveh.DataLength + sizeof(WAVEHEADER) - 4;
302 /* Write Wave Header */
303 if( fseek( p_aout->output.p_sys->p_file, 0, SEEK_SET ) )
305 msg_Err( p_aout, "seek error (%m)" );
308 /* Header -> little endian format */
309 SetDWLE( &p_aout->output.p_sys->waveh.Length,
310 p_aout->output.p_sys->waveh.Length );
311 SetDWLE( &p_aout->output.p_sys->waveh.DataLength,
312 p_aout->output.p_sys->waveh.DataLength );
314 if( fwrite( &p_aout->output.p_sys->waveh, sizeof(WAVEHEADER), 1,
315 p_aout->output.p_sys->p_file ) != 1 )
317 msg_Err( p_aout, "write error (%m)" );
321 if( p_aout->output.p_sys->p_file != stdout )
322 fclose( p_aout->output.p_sys->p_file );
323 free( p_aout->output.p_sys );
326 /*****************************************************************************
327 * Play: pretend to play a sound
328 *****************************************************************************/
329 static void Play( aout_instance_t * p_aout )
331 aout_buffer_t * p_buffer;
333 p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
335 if( fwrite( p_buffer->p_buffer, p_buffer->i_nb_bytes, 1,
336 p_aout->output.p_sys->p_file ) != 1 )
338 msg_Err( p_aout, "write error (%m)" );
341 if( p_aout->output.p_sys->b_add_wav_header )
343 /* Update Wave Header */
344 p_aout->output.p_sys->waveh.DataLength += p_buffer->i_nb_bytes;
347 aout_BufferFree( p_buffer );