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286 lines
10 KiB
286 lines
10 KiB
/*****************************************************************************
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* file.c : audio output which writes the samples to a file
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*****************************************************************************
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* Copyright (C) 2002 VideoLAN
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* $Id: file.c,v 1.14 2002/11/11 19:16:21 gbazin Exp $
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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* Gildas Bazin <gbazin@netcourrier.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <vlc/vlc.h>
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#include <vlc/aout.h>
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#include "aout_internal.h"
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#include "codecs.h"
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#define FRAME_SIZE 2048
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#define A52_FRAME_NB 1536
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typedef struct WAVEHEADER
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{
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uint32_t MainChunkID; // it will be 'RIFF'
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uint32_t Length;
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uint32_t ChunkTypeID; // it will be 'WAVE'
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uint32_t SubChunkID; // it will be 'fmt '
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uint32_t SubChunkLength;
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uint16_t Format;
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uint16_t Modus;
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uint32_t SampleFreq;
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uint32_t BytesPerSec;
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uint16_t BytesPerSample;
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uint16_t BitsPerSample;
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uint32_t DataChunkID; // it will be 'data'
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uint32_t DataLength;
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} WAVEHEADER;
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/*****************************************************************************
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* aout_sys_t: audio output method descriptor
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*****************************************************************************
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* This structure is part of the audio output thread descriptor.
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* It describes the direct sound specific properties of an audio device.
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*****************************************************************************/
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struct aout_sys_t
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{
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FILE * p_file;
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vlc_bool_t b_add_wav_header;
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WAVEHEADER waveh; /* Wave header of the output file */
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};
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/*****************************************************************************
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* Local prototypes.
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*****************************************************************************/
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static int Open ( vlc_object_t * );
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static void Close ( vlc_object_t * );
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static void Play ( aout_instance_t * );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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#define FORMAT_TEXT N_("output format")
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#define FORMAT_LONGTEXT N_("one of \"u8\", \"s8\", \"u16\", \"s16\"," \
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" \"u16_le\", \"s16_le\", \"u16_be\"," \
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" \"s16_be\", \"fixed32\", \"float32\" or \"spdif\"")
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#define WAV_TEXT N_("add wave header")
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#define WAV_LONGTEXT N_("instead of writing a raw file, you can add a wav " \
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"header to the file")
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static char *format_list[] = { "u8", "s8", "u16", "s16", "u16_le", "s16_le",
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"u16_be", "s16_be", "fixed32", "float32",
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"spdif", NULL };
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static int format_int[] = { VLC_FOURCC('u','8',' ',' '),
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VLC_FOURCC('s','8',' ',' '),
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AOUT_FMT_U16_NE, AOUT_FMT_S16_NE,
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VLC_FOURCC('u','1','6','l'),
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VLC_FOURCC('s','1','6','l'),
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VLC_FOURCC('u','1','6','b'),
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VLC_FOURCC('s','1','6','b'),
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VLC_FOURCC('f','i','3','2'),
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VLC_FOURCC('f','l','3','2'),
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VLC_FOURCC('s','p','i','f') };
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#define PATH_TEXT N_("path of the output file")
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#define PATH_LONGTEXT N_("By default samples.raw")
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vlc_module_begin();
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add_category_hint( N_("Audio"), NULL );
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add_string_from_list( "audiofile-format", "s16", format_list, NULL,
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FORMAT_TEXT, FORMAT_LONGTEXT );
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add_string( "audiofile-path", "audiofile.wav", NULL, PATH_TEXT,
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PATH_LONGTEXT );
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add_bool( "audiofile-wav", 1, NULL, WAV_TEXT, WAV_LONGTEXT );
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set_description( _("file audio output module") );
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set_capability( "audio output", 0 );
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add_shortcut( "file" );
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add_shortcut( "audiofile" );
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set_callbacks( Open, Close );
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vlc_module_end();
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/*****************************************************************************
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* Open: open a dummy audio device
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*****************************************************************************/
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static int Open( vlc_object_t * p_this )
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{
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aout_instance_t * p_aout = (aout_instance_t *)p_this;
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char * psz_name = config_GetPsz( p_this, "audiofile-path" );
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char * psz_format = config_GetPsz( p_aout, "audiofile-format" );
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char ** ppsz_compare = format_list;
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int i = 0;
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/* Allocate structure */
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p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
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if( p_aout->output.p_sys == NULL )
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{
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msg_Err( p_aout, "out of memory" );
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return VLC_EGENERIC;
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}
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p_aout->output.p_sys->p_file = fopen( psz_name, "wb" );
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free( psz_name );
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if ( p_aout->output.p_sys->p_file == NULL )
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{
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free( p_aout->output.p_sys );
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return -1;
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}
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p_aout->output.pf_play = Play;
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while ( *ppsz_compare != NULL )
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{
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if ( !strncmp( *ppsz_compare, psz_format, strlen(*ppsz_compare) ) )
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{
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break;
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}
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ppsz_compare++; i++;
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}
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if ( *ppsz_compare == NULL )
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{
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msg_Err( p_aout, "Cannot understand the format string (%s)",
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psz_format );
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fclose( p_aout->output.p_sys->p_file );
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free( p_aout->output.p_sys );
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return -1;
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}
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p_aout->output.output.i_format = format_int[i];
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if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
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{
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p_aout->output.i_nb_samples = A52_FRAME_NB;
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p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
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p_aout->output.output.i_frame_length = A52_FRAME_NB;
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aout_VolumeNoneInit( p_aout );
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}
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else
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{
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p_aout->output.i_nb_samples = FRAME_SIZE;
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aout_VolumeSoftInit( p_aout );
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}
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p_aout->output.p_sys->b_add_wav_header =
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config_GetInt( p_this, "audiofile-wav" );
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if( p_aout->output.p_sys->b_add_wav_header )
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{
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/* Write wave header */
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WAVEHEADER *wh = &p_aout->output.p_sys->waveh;
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memset( wh, 0, sizeof(wh) );
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switch( p_aout->output.output.i_format )
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{
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case VLC_FOURCC('f','l','3','2'):
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wh->Format = WAVE_FORMAT_IEEE_FLOAT;
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wh->BitsPerSample = sizeof(float) * 8;
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break;
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case VLC_FOURCC('u','8',' ',' '):
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wh->Format = WAVE_FORMAT_PCM;
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wh->BitsPerSample = 8;
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break;
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case VLC_FOURCC('s','1','6','l'):
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default:
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wh->Format = WAVE_FORMAT_PCM;
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wh->BitsPerSample = 16;
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break;
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}
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wh->MainChunkID = VLC_FOURCC('R', 'I', 'F', 'F');
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wh->Length = 0; /* temp, to be filled in as we go */
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wh->ChunkTypeID = VLC_FOURCC('W', 'A', 'V', 'E');
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wh->SubChunkID = VLC_FOURCC('f', 'm', 't', ' ');
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wh->SubChunkLength = 16;
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wh->Modus = aout_FormatNbChannels( &p_aout->output.output );
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wh->SampleFreq = p_aout->output.output.i_rate;
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wh->BytesPerSample = wh->Modus * ( wh->BitsPerSample / 8 );
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wh->BytesPerSec = wh->BytesPerSample * wh->SampleFreq;
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wh->DataChunkID = VLC_FOURCC('d', 'a', 't', 'a');
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wh->DataLength = 0; /* temp, to be filled in as we go */
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if( fwrite( wh, sizeof(WAVEHEADER), 1,
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p_aout->output.p_sys->p_file ) != 1 )
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{
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msg_Err( p_aout, "write error (%s)", strerror(errno) );
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}
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}
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return 0;
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}
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/*****************************************************************************
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* Close: close our file
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*****************************************************************************/
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static void Close( vlc_object_t * p_this )
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{
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aout_instance_t * p_aout = (aout_instance_t *)p_this;
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msg_Dbg( p_aout, "closing audio file" );
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if( p_aout->output.p_sys->b_add_wav_header )
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{
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/* Update Wave Header */
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p_aout->output.p_sys->waveh.Length =
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p_aout->output.p_sys->waveh.DataLength + sizeof(WAVEHEADER) - 4;
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/* Write Wave Header */
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if( fseek( p_aout->output.p_sys->p_file, 0, SEEK_SET ) )
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{
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msg_Err( p_aout, "seek error (%s)", strerror(errno) );
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}
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if( fwrite( &p_aout->output.p_sys->waveh, sizeof(WAVEHEADER), 1,
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p_aout->output.p_sys->p_file ) != 1 )
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{
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msg_Err( p_aout, "write error (%s)", strerror(errno) );
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}
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}
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fclose( p_aout->output.p_sys->p_file );
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free( p_aout->output.p_sys );
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}
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/*****************************************************************************
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* Play: pretend to play a sound
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*****************************************************************************/
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static void Play( aout_instance_t * p_aout )
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{
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aout_buffer_t * p_buffer;
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p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
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if( fwrite( p_buffer->p_buffer, p_buffer->i_nb_bytes, 1,
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p_aout->output.p_sys->p_file ) != 1 )
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{
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msg_Err( p_aout, "write error (%s)", strerror(errno) );
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}
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if( p_aout->output.p_sys->b_add_wav_header )
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{
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/* Update Wave Header */
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p_aout->output.p_sys->waveh.DataLength += p_buffer->i_nb_bytes;
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}
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aout_BufferFree( p_buffer );
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}
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