1 /*****************************************************************************
2 * file.c : audio output which writes the samples to a file
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
5 * $Id: file.c,v 1.14 2002/11/11 19:16:21 gbazin Exp $
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
35 #include "aout_internal.h"
38 #define FRAME_SIZE 2048
39 #define A52_FRAME_NB 1536
41 typedef struct WAVEHEADER
43 uint32_t MainChunkID; // it will be 'RIFF'
45 uint32_t ChunkTypeID; // it will be 'WAVE'
46 uint32_t SubChunkID; // it will be 'fmt '
47 uint32_t SubChunkLength;
52 uint16_t BytesPerSample;
53 uint16_t BitsPerSample;
54 uint32_t DataChunkID; // it will be 'data'
58 /*****************************************************************************
59 * aout_sys_t: audio output method descriptor
60 *****************************************************************************
61 * This structure is part of the audio output thread descriptor.
62 * It describes the direct sound specific properties of an audio device.
63 *****************************************************************************/
67 vlc_bool_t b_add_wav_header;
69 WAVEHEADER waveh; /* Wave header of the output file */
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\"," \
85 " \"s16_be\", \"fixed32\", \"float32\" or \"spdif\"")
86 #define WAV_TEXT N_("add wave header")
87 #define WAV_LONGTEXT N_("instead of writing a raw file, you can add a wav " \
90 static char *format_list[] = { "u8", "s8", "u16", "s16", "u16_le", "s16_le",
91 "u16_be", "s16_be", "fixed32", "float32",
93 static int format_int[] = { VLC_FOURCC('u','8',' ',' '),
94 VLC_FOURCC('s','8',' ',' '),
95 AOUT_FMT_U16_NE, AOUT_FMT_S16_NE,
96 VLC_FOURCC('u','1','6','l'),
97 VLC_FOURCC('s','1','6','l'),
98 VLC_FOURCC('u','1','6','b'),
99 VLC_FOURCC('s','1','6','b'),
100 VLC_FOURCC('f','i','3','2'),
101 VLC_FOURCC('f','l','3','2'),
102 VLC_FOURCC('s','p','i','f') };
104 #define PATH_TEXT N_("path of the output file")
105 #define PATH_LONGTEXT N_("By default samples.raw")
108 add_category_hint( N_("Audio"), NULL );
109 add_string_from_list( "audiofile-format", "s16", format_list, NULL,
110 FORMAT_TEXT, FORMAT_LONGTEXT );
111 add_string( "audiofile-path", "audiofile.wav", NULL, PATH_TEXT,
113 add_bool( "audiofile-wav", 1, NULL, WAV_TEXT, WAV_LONGTEXT );
114 set_description( _("file audio output module") );
115 set_capability( "audio output", 0 );
116 add_shortcut( "file" );
117 add_shortcut( "audiofile" );
118 set_callbacks( Open, Close );
121 /*****************************************************************************
122 * Open: open a dummy audio device
123 *****************************************************************************/
124 static int Open( vlc_object_t * p_this )
126 aout_instance_t * p_aout = (aout_instance_t *)p_this;
127 char * psz_name = config_GetPsz( p_this, "audiofile-path" );
128 char * psz_format = config_GetPsz( p_aout, "audiofile-format" );
129 char ** ppsz_compare = format_list;
132 /* Allocate structure */
133 p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
134 if( p_aout->output.p_sys == NULL )
136 msg_Err( p_aout, "out of memory" );
140 p_aout->output.p_sys->p_file = fopen( psz_name, "wb" );
142 if ( p_aout->output.p_sys->p_file == NULL )
144 free( p_aout->output.p_sys );
148 p_aout->output.pf_play = Play;
150 while ( *ppsz_compare != NULL )
152 if ( !strncmp( *ppsz_compare, psz_format, strlen(*ppsz_compare) ) )
159 if ( *ppsz_compare == NULL )
161 msg_Err( p_aout, "Cannot understand the format string (%s)",
163 fclose( p_aout->output.p_sys->p_file );
164 free( p_aout->output.p_sys );
168 p_aout->output.output.i_format = format_int[i];
169 if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
171 p_aout->output.i_nb_samples = A52_FRAME_NB;
172 p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
173 p_aout->output.output.i_frame_length = A52_FRAME_NB;
174 aout_VolumeNoneInit( p_aout );
178 p_aout->output.i_nb_samples = FRAME_SIZE;
179 aout_VolumeSoftInit( p_aout );
182 p_aout->output.p_sys->b_add_wav_header =
183 config_GetInt( p_this, "audiofile-wav" );
185 if( p_aout->output.p_sys->b_add_wav_header )
187 /* Write wave header */
188 WAVEHEADER *wh = &p_aout->output.p_sys->waveh;
190 memset( wh, 0, sizeof(wh) );
192 switch( p_aout->output.output.i_format )
194 case VLC_FOURCC('f','l','3','2'):
195 wh->Format = WAVE_FORMAT_IEEE_FLOAT;
196 wh->BitsPerSample = sizeof(float) * 8;
198 case VLC_FOURCC('u','8',' ',' '):
199 wh->Format = WAVE_FORMAT_PCM;
200 wh->BitsPerSample = 8;
202 case VLC_FOURCC('s','1','6','l'):
204 wh->Format = WAVE_FORMAT_PCM;
205 wh->BitsPerSample = 16;
209 wh->MainChunkID = VLC_FOURCC('R', 'I', 'F', 'F');
210 wh->Length = 0; /* temp, to be filled in as we go */
211 wh->ChunkTypeID = VLC_FOURCC('W', 'A', 'V', 'E');
212 wh->SubChunkID = VLC_FOURCC('f', 'm', 't', ' ');
213 wh->SubChunkLength = 16;
215 wh->Modus = aout_FormatNbChannels( &p_aout->output.output );
216 wh->SampleFreq = p_aout->output.output.i_rate;
217 wh->BytesPerSample = wh->Modus * ( wh->BitsPerSample / 8 );
218 wh->BytesPerSec = wh->BytesPerSample * wh->SampleFreq;
220 wh->DataChunkID = VLC_FOURCC('d', 'a', 't', 'a');
221 wh->DataLength = 0; /* temp, to be filled in as we go */
223 if( fwrite( wh, sizeof(WAVEHEADER), 1,
224 p_aout->output.p_sys->p_file ) != 1 )
226 msg_Err( p_aout, "write error (%s)", strerror(errno) );
233 /*****************************************************************************
234 * Close: close our file
235 *****************************************************************************/
236 static void Close( vlc_object_t * p_this )
238 aout_instance_t * p_aout = (aout_instance_t *)p_this;
240 msg_Dbg( p_aout, "closing audio file" );
242 if( p_aout->output.p_sys->b_add_wav_header )
244 /* Update Wave Header */
245 p_aout->output.p_sys->waveh.Length =
246 p_aout->output.p_sys->waveh.DataLength + sizeof(WAVEHEADER) - 4;
248 /* Write Wave Header */
249 if( fseek( p_aout->output.p_sys->p_file, 0, SEEK_SET ) )
251 msg_Err( p_aout, "seek error (%s)", strerror(errno) );
253 if( fwrite( &p_aout->output.p_sys->waveh, sizeof(WAVEHEADER), 1,
254 p_aout->output.p_sys->p_file ) != 1 )
256 msg_Err( p_aout, "write error (%s)", strerror(errno) );
260 fclose( p_aout->output.p_sys->p_file );
261 free( p_aout->output.p_sys );
264 /*****************************************************************************
265 * Play: pretend to play a sound
266 *****************************************************************************/
267 static void Play( aout_instance_t * p_aout )
269 aout_buffer_t * p_buffer;
271 p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
273 if( fwrite( p_buffer->p_buffer, p_buffer->i_nb_bytes, 1,
274 p_aout->output.p_sys->p_file ) != 1 )
276 msg_Err( p_aout, "write error (%s)", strerror(errno) );
279 if( p_aout->output.p_sys->b_add_wav_header )
281 /* Update Wave Header */
282 p_aout->output.p_sys->waveh.DataLength += p_buffer->i_nb_bytes;
285 aout_BufferFree( p_buffer );