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 *****************************************************************************/
35 #include <vlc_plugin.h>
37 #include <vlc_codecs.h> /* WAVEHEADER */
38 #include <vlc_charset.h>
40 #define FRAME_SIZE 2048
41 #define A52_FRAME_NB 1536
43 /*****************************************************************************
44 * aout_sys_t: audio output method descriptor
45 *****************************************************************************
46 * This structure is part of the audio output thread descriptor.
47 * It describes the direct sound specific properties of an audio device.
48 *****************************************************************************/
52 bool b_add_wav_header;
54 WAVEHEADER waveh; /* Wave header of the output file */
57 #define CHANNELS_MAX 6
58 static int pi_channels_maps[CHANNELS_MAX+1] =
62 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
63 AOUT_CHAN_CENTER | AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT,
64 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_REARLEFT
65 | AOUT_CHAN_REARRIGHT,
66 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
67 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT,
68 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
69 | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE
72 /*****************************************************************************
74 *****************************************************************************/
75 static int Open ( vlc_object_t * );
76 static void Close ( vlc_object_t * );
77 static void Play ( aout_instance_t * );
79 /*****************************************************************************
81 *****************************************************************************/
82 #define FORMAT_TEXT N_("Output format")
83 #define FORMAT_LONGTEXT N_("One of \"u8\", \"s8\", \"u16\", \"s16\", " \
84 "\"u16_le\", \"s16_le\", \"u16_be\", \"s16_be\", \"fixed32\", " \
85 "\"float32\" or \"spdif\"")
86 #define CHANNELS_TEXT N_("Number of output channels")
87 #define CHANNELS_LONGTEXT N_("By default, all the channels of the incoming " \
88 "will be saved but you can restrict the number of channels here.")
90 #define WAV_TEXT N_("Add WAVE header")
91 #define WAV_LONGTEXT N_("Instead of writing a raw file, you can add a WAV " \
92 "header to the file.")
94 static const char *format_list[] = { "u8", "s8", "u16", "s16", "u16_le",
95 "s16_le", "u16_be", "s16_be", "fixed32",
97 static int format_int[] = { VLC_FOURCC('u','8',' ',' '),
98 VLC_FOURCC('s','8',' ',' '),
99 AOUT_FMT_U16_NE, AOUT_FMT_S16_NE,
100 VLC_FOURCC('u','1','6','l'),
101 VLC_FOURCC('s','1','6','l'),
102 VLC_FOURCC('u','1','6','b'),
103 VLC_FOURCC('s','1','6','b'),
104 VLC_FOURCC('f','i','3','2'),
105 VLC_FOURCC('f','l','3','2'),
106 VLC_FOURCC('s','p','i','f') };
108 #define FILE_TEXT N_("Output file")
109 #define FILE_LONGTEXT N_("File to which the audio samples will be written to. (\"-\" for stdout")
112 set_description( N_("File audio output") );
113 set_shortname( N_("File") );
114 set_category( CAT_AUDIO );
115 set_subcategory( SUBCAT_AUDIO_AOUT );
117 add_string( "audiofile-format", "s16", NULL,
118 FORMAT_TEXT, FORMAT_LONGTEXT, true );
119 change_string_list( format_list, 0, 0 );
120 add_integer( "audiofile-channels", 0, NULL,
121 CHANNELS_TEXT, CHANNELS_LONGTEXT, true );
122 add_file( "audiofile-file", "audiofile.wav", NULL, FILE_TEXT,
123 FILE_LONGTEXT, false );
125 add_bool( "audiofile-wav", 1, NULL, WAV_TEXT, WAV_LONGTEXT, true );
127 set_capability( "audio output", 0 );
128 add_shortcut( "file" );
129 add_shortcut( "audiofile" );
130 set_callbacks( Open, Close );
133 /*****************************************************************************
134 * Open: open a dummy audio device
135 *****************************************************************************/
136 static int Open( vlc_object_t * p_this )
138 aout_instance_t * p_aout = (aout_instance_t *)p_this;
139 char * psz_name, * psz_format;
140 const char ** ppsz_compare = format_list;
142 int i_channels, i = 0;
144 var_Create( p_this, "audiofile-file", VLC_VAR_STRING|VLC_VAR_DOINHERIT );
145 var_Get( p_this, "audiofile-file", &val );
146 psz_name = val.psz_string;
147 if( !psz_name || !*psz_name )
149 msg_Err( p_aout, "you need to specify an output file name" );
154 /* Allocate structure */
155 p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
156 if( p_aout->output.p_sys == NULL )
158 msg_Err( p_aout, "out of memory" );
162 if( !strcmp( psz_name, "-" ) )
163 p_aout->output.p_sys->p_file = stdout;
165 p_aout->output.p_sys->p_file = utf8_fopen( psz_name, "wb" );
168 if ( p_aout->output.p_sys->p_file == NULL )
170 free( p_aout->output.p_sys );
174 p_aout->output.pf_play = Play;
177 var_Create( p_this, "audiofile-format", VLC_VAR_STRING|VLC_VAR_DOINHERIT );
178 var_Get( p_this, "audiofile-format", &val );
179 psz_format = val.psz_string;
181 while ( *ppsz_compare != NULL )
183 if ( !strncmp( *ppsz_compare, psz_format, strlen(*ppsz_compare) ) )
190 if ( *ppsz_compare == NULL )
192 msg_Err( p_aout, "cannot understand the format string (%s)",
194 if( p_aout->output.p_sys->p_file != stdout )
195 fclose( p_aout->output.p_sys->p_file );
196 free( p_aout->output.p_sys );
200 p_aout->output.output.i_format = format_int[i];
201 if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
203 p_aout->output.i_nb_samples = A52_FRAME_NB;
204 p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
205 p_aout->output.output.i_frame_length = A52_FRAME_NB;
206 aout_VolumeNoneInit( p_aout );
210 p_aout->output.i_nb_samples = FRAME_SIZE;
211 aout_VolumeSoftInit( p_aout );
214 /* Channels number */
215 var_Create( p_this, "audiofile-channels",
216 VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
217 var_Get( p_this, "audiofile-channels", &val );
218 i_channels = val.i_int;
220 if( i_channels > 0 && i_channels <= CHANNELS_MAX )
222 p_aout->output.output.i_physical_channels =
223 pi_channels_maps[i_channels];
227 var_Create( p_this, "audiofile-wav", VLC_VAR_BOOL|VLC_VAR_DOINHERIT );
228 var_Get( p_this, "audiofile-wav", &val );
229 p_aout->output.p_sys->b_add_wav_header = val.b_bool;
231 if( p_aout->output.p_sys->b_add_wav_header )
233 /* Write wave header */
234 WAVEHEADER *wh = &p_aout->output.p_sys->waveh;
236 memset( wh, 0, sizeof(wh) );
238 switch( p_aout->output.output.i_format )
240 case VLC_FOURCC('f','l','3','2'):
241 wh->Format = WAVE_FORMAT_IEEE_FLOAT;
242 wh->BitsPerSample = sizeof(float) * 8;
244 case VLC_FOURCC('u','8',' ',' '):
245 wh->Format = WAVE_FORMAT_PCM;
246 wh->BitsPerSample = 8;
248 case VLC_FOURCC('s','1','6','l'):
250 wh->Format = WAVE_FORMAT_PCM;
251 wh->BitsPerSample = 16;
255 wh->MainChunkID = VLC_FOURCC('R', 'I', 'F', 'F');
256 wh->Length = 0; /* temp, to be filled in as we go */
257 wh->ChunkTypeID = VLC_FOURCC('W', 'A', 'V', 'E');
258 wh->SubChunkID = VLC_FOURCC('f', 'm', 't', ' ');
259 wh->SubChunkLength = 16;
261 wh->Modus = aout_FormatNbChannels( &p_aout->output.output );
262 wh->SampleFreq = p_aout->output.output.i_rate;
263 wh->BytesPerSample = wh->Modus * ( wh->BitsPerSample / 8 );
264 wh->BytesPerSec = wh->BytesPerSample * wh->SampleFreq;
266 wh->DataChunkID = VLC_FOURCC('d', 'a', 't', 'a');
267 wh->DataLength = 0; /* temp, to be filled in as we go */
269 /* Header -> little endian format */
270 SetWLE( &wh->Format, wh->Format );
271 SetWLE( &wh->BitsPerSample, wh->BitsPerSample );
272 SetDWLE( &wh->SubChunkLength, wh->SubChunkLength );
273 SetWLE( &wh->Modus, wh->Modus );
274 SetDWLE( &wh->SampleFreq, wh->SampleFreq );
275 SetWLE( &wh->BytesPerSample, wh->BytesPerSample );
276 SetDWLE( &wh->BytesPerSec, wh->BytesPerSec );
278 if( fwrite( wh, sizeof(WAVEHEADER), 1,
279 p_aout->output.p_sys->p_file ) != 1 )
281 msg_Err( p_aout, "write error (%m)" );
288 /*****************************************************************************
289 * Close: close our file
290 *****************************************************************************/
291 static void Close( vlc_object_t * p_this )
293 aout_instance_t * p_aout = (aout_instance_t *)p_this;
295 msg_Dbg( p_aout, "closing audio file" );
297 if( p_aout->output.p_sys->b_add_wav_header )
299 /* Update Wave Header */
300 p_aout->output.p_sys->waveh.Length =
301 p_aout->output.p_sys->waveh.DataLength + sizeof(WAVEHEADER) - 4;
303 /* Write Wave Header */
304 if( fseek( p_aout->output.p_sys->p_file, 0, SEEK_SET ) )
306 msg_Err( p_aout, "seek error (%m)" );
309 /* Header -> little endian format */
310 SetDWLE( &p_aout->output.p_sys->waveh.Length,
311 p_aout->output.p_sys->waveh.Length );
312 SetDWLE( &p_aout->output.p_sys->waveh.DataLength,
313 p_aout->output.p_sys->waveh.DataLength );
315 if( fwrite( &p_aout->output.p_sys->waveh, sizeof(WAVEHEADER), 1,
316 p_aout->output.p_sys->p_file ) != 1 )
318 msg_Err( p_aout, "write error (%m)" );
322 if( p_aout->output.p_sys->p_file != stdout )
323 fclose( p_aout->output.p_sys->p_file );
324 free( p_aout->output.p_sys );
327 /*****************************************************************************
328 * Play: pretend to play a sound
329 *****************************************************************************/
330 static void Play( aout_instance_t * p_aout )
332 aout_buffer_t * p_buffer;
334 p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
336 if( fwrite( p_buffer->p_buffer, p_buffer->i_nb_bytes, 1,
337 p_aout->output.p_sys->p_file ) != 1 )
339 msg_Err( p_aout, "write error (%m)" );
342 if( p_aout->output.p_sys->b_add_wav_header )
344 /* Update Wave Header */
345 p_aout->output.p_sys->waveh.DataLength += p_buffer->i_nb_bytes;
348 aout_BufferFree( p_buffer );