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vlc/modules/demux/au.c

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/*****************************************************************************
* au.c : au file input module for vlc
*****************************************************************************
* Copyright (C) 2001-2003 VideoLAN
* $Id: au.c,v 1.7 2003/09/12 16:26:40 fenrir Exp $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h> /* malloc(), free() */
#include <vlc/vlc.h>
#include <vlc/input.h>
#include <codecs.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
vlc_module_begin();
set_description( _("AU demuxer") );
set_capability( "demux", 142 );
set_callbacks( Open, Close );
vlc_module_end();
/*
* TODO:
* - all adpcm things (I _NEED_ samples)
*/
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int DemuxPCM ( input_thread_t * );
/* TODO static int DemuxADPCM ( input_thread_t * ); */
enum AuType_e
{
AU_UNKNOWN = 0,
AU_MULAW_8 = 1, /* 8-bit ISDN u-law */
AU_LINEAR_8 = 2, /* 8-bit linear PCM */
AU_LINEAR_16 = 3, /* 16-bit linear PCM */
AU_LINEAR_24 = 4, /* 24-bit linear PCM */
AU_LINEAR_32 = 5, /* 32-bit linear PCM */
AU_FLOAT = 6, /* 32-bit IEEE floating point */
AU_DOUBLE = 7, /* 64-bit IEEE floating point */
AU_ADPCM_G721 = 23, /* 4-bit CCITT g.721 ADPCM */
AU_ADPCM_G722 = 24, /* CCITT g.722 ADPCM */
AU_ADPCM_G723_3 = 25, /* CCITT g.723 3-bit ADPCM */
AU_ADPCM_G723_5 = 26, /* CCITT g.723 5-bit ADPCM */
AU_ALAW_8 = 27 /* 8-bit ISDN A-law */
};
enum AuCat_e
{
AU_CAT_UNKNOWN = 0,
AU_CAT_PCM = 1,
AU_CAT_ADPCM = 2
};
typedef struct
#ifdef HAVE_ATTRIBUTE_PACKED
__attribute__((__packed__))
#endif
{
uint32_t i_header_size;
uint32_t i_data_size;
uint32_t i_encoding;
uint32_t i_sample_rate;
uint32_t i_channels;
} au_t;
struct demux_sys_t
{
au_t au;
WAVEFORMATEX wf;
mtime_t i_time;
es_descriptor_t *p_es;
int i_frame_size;
mtime_t i_frame_length;
};
/*****************************************************************************
* Open: check file and initializes structures
*****************************************************************************/
static int Open( vlc_object_t * p_this )
{
input_thread_t *p_input = (input_thread_t *)p_this;
demux_sys_t *p_sys;
uint8_t *p_peek;
vlc_fourcc_t i_fourcc;
int i_cat;
/* a little test to see if it's a au file */
if( input_Peek( p_input, &p_peek, 4 ) < 4 )
{
msg_Warn( p_input, "AU module discarded (cannot peek)" );
return VLC_EGENERIC;
}
if( strncmp( p_peek, ".snd", 4 ) )
{
msg_Warn( p_input, "AU module discarded (not a valid file)" );
return VLC_EGENERIC;
}
p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
p_sys->i_time = 0;
/* skip signature */
stream_Read( p_input->s, NULL, 4 ); /* cannot fail */
/* read header */
if( stream_Read( p_input->s, &p_sys->au, sizeof(au_t) )<(int)sizeof(au_t) )
{
msg_Err( p_input, "cannot load header" );
goto error;
}
p_sys->au.i_header_size = GetDWBE( &p_sys->au.i_header_size );
p_sys->au.i_data_size = GetDWBE( &p_sys->au.i_data_size );
p_sys->au.i_encoding = GetDWBE( &p_sys->au.i_encoding );
p_sys->au.i_sample_rate = GetDWBE( &p_sys->au.i_sample_rate );
p_sys->au.i_channels = GetDWBE( &p_sys->au.i_channels );
msg_Dbg( p_input,
"au file: header_size=%d data_size=%d encoding=0x%x sample_rate=%d channels=%d",
p_sys->au.i_header_size,
p_sys->au.i_data_size,
p_sys->au.i_encoding,
p_sys->au.i_sample_rate,
p_sys->au.i_channels );
if( p_sys->au.i_header_size < 24 )
{
msg_Warn( p_input, "AU module discarded (not a valid file)" );
goto error;
}
/* skip extra header data */
if( p_sys->au.i_header_size > 4 + sizeof( au_t ) )
{
stream_Read( p_input->s,
NULL, p_sys->au.i_header_size - 4 - sizeof( au_t ) );
}
/* Create WAVEFORMATEX structure */
p_sys->wf.nChannels = p_sys->au.i_channels;
p_sys->wf.nSamplesPerSec= p_sys->au.i_sample_rate;
p_sys->wf.cbSize = 0;
switch( p_sys->au.i_encoding )
{
case AU_ALAW_8: /* 8-bit ISDN A-law */
p_sys->wf.wFormatTag = WAVE_FORMAT_ALAW; // FIXME ??
p_sys->wf.wBitsPerSample = 8;
p_sys->wf.nBlockAlign = 1 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 'a','l','a','w' );
i_cat = AU_CAT_PCM;
break;
case AU_MULAW_8: /* 8-bit ISDN u-law */
p_sys->wf.wFormatTag = WAVE_FORMAT_MULAW; // FIXME ??
p_sys->wf.wBitsPerSample = 8;
p_sys->wf.nBlockAlign = 1 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 'u','l','a','w' );
i_cat = AU_CAT_PCM;
break;
case AU_LINEAR_8: /* 8-bit linear PCM */
p_sys->wf.wFormatTag = WAVE_FORMAT_PCM;
p_sys->wf.wBitsPerSample = 8;
p_sys->wf.nBlockAlign = 1 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 't','w','o','s' );
i_cat = AU_CAT_PCM;
break;
case AU_LINEAR_16: /* 16-bit linear PCM */
p_sys->wf.wFormatTag = WAVE_FORMAT_PCM;
p_sys->wf.wBitsPerSample = 16;
p_sys->wf.nBlockAlign = 2 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 't','w','o','s' );
i_cat = AU_CAT_PCM;
break;
case AU_LINEAR_24: /* 24-bit linear PCM */
p_sys->wf.wFormatTag = WAVE_FORMAT_PCM;
p_sys->wf.wBitsPerSample = 24;
p_sys->wf.nBlockAlign = 3 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 't','w','o','s' );
i_cat = AU_CAT_PCM;
break;
case AU_LINEAR_32: /* 32-bit linear PCM */
p_sys->wf.wFormatTag = WAVE_FORMAT_PCM;
p_sys->wf.wBitsPerSample = 32;
p_sys->wf.nBlockAlign = 4 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 't','w','o','s' );
i_cat = AU_CAT_PCM;
break;
case AU_FLOAT: /* 32-bit IEEE floating point */
p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
p_sys->wf.wBitsPerSample = 32;
p_sys->wf.nBlockAlign = 4 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_FLOAT );
i_cat = AU_CAT_PCM;
break;
case AU_DOUBLE: /* 64-bit IEEE floating point */
p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
p_sys->wf.wBitsPerSample = 64;
p_sys->wf.nBlockAlign = 8 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_DOUBLE );
i_cat = AU_CAT_PCM;
break;
case AU_ADPCM_G721: /* 4-bit CCITT g.721 ADPCM */
p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
p_sys->wf.wBitsPerSample = 0;
p_sys->wf.nBlockAlign = 0 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G721 );
i_cat = AU_CAT_ADPCM;
break;
case AU_ADPCM_G722: /* CCITT g.722 ADPCM */
p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
p_sys->wf.wBitsPerSample = 0;
p_sys->wf.nBlockAlign = 0 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G722 );
i_cat = AU_CAT_ADPCM;
break;
case AU_ADPCM_G723_3: /* CCITT g.723 3-bit ADPCM */
p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
p_sys->wf.wBitsPerSample = 0;
p_sys->wf.nBlockAlign = 0 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_3 );
i_cat = AU_CAT_ADPCM;
break;
case AU_ADPCM_G723_5: /* CCITT g.723 5-bit ADPCM */
p_sys->wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
p_sys->wf.wBitsPerSample = 0;
p_sys->wf.nBlockAlign = 0 * p_sys->wf.nChannels;
i_fourcc = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_5 );
i_cat = AU_CAT_ADPCM;
break;
default:
msg_Warn( p_input, "unknow encoding=0x%x", p_sys->au.i_encoding );
i_cat = AU_CAT_UNKNOWN;
goto error;
}
p_sys->wf.nAvgBytesPerSec = p_sys->wf.nSamplesPerSec * p_sys->wf.nChannels * p_sys->wf.wBitsPerSample / 8;
if( i_cat == AU_CAT_UNKNOWN || i_cat == AU_CAT_ADPCM )
{
p_sys->i_frame_size = 0;
p_sys->i_frame_length = 0;
msg_Err( p_input, "unsupported codec/type (Please report it)" );
goto error;
}
else
{
int i_samples, i_modulo;
/* read samples for 50ms of */
i_samples = __MAX( p_sys->wf.nSamplesPerSec / 20, 1 );
p_sys->i_frame_size = i_samples * p_sys->wf.nChannels * ( (p_sys->wf.wBitsPerSample + 7) / 8 );
if( p_sys->wf.nBlockAlign > 0 )
{
if( ( i_modulo = p_sys->i_frame_size % p_sys->wf.nBlockAlign ) != 0 )
{
p_sys->i_frame_size += p_sys->wf.nBlockAlign - i_modulo;
}
}
p_sys->i_frame_length = (mtime_t)1000000 *
(mtime_t)i_samples /
(mtime_t)p_sys->wf.nSamplesPerSec;
p_input->pf_demux = DemuxPCM;
p_input->pf_demux_control = demux_vaControlDefault;
}
/* create one program */
vlc_mutex_lock( &p_input->stream.stream_lock );
if( input_InitStream( p_input, 0 ) == -1)
{
vlc_mutex_unlock( &p_input->stream.stream_lock );
msg_Err( p_input, "cannot init stream" );
goto error;
}
if( input_AddProgram( p_input, 0, 0) == NULL )
{
vlc_mutex_unlock( &p_input->stream.stream_lock );
msg_Err( p_input, "cannot add program" );
goto error;
}
p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
p_input->stream.i_mux_rate = p_sys->wf.nAvgBytesPerSec / 50;
p_sys->p_es = input_AddES( p_input, p_input->stream.p_selected_program,
0x01, AUDIO_ES, NULL, 0 );
p_sys->p_es->i_stream_id = 0x01;
p_sys->p_es->i_fourcc = i_fourcc;
p_sys->p_es->p_waveformatex= malloc( sizeof( WAVEFORMATEX ) );
memcpy( p_sys->p_es->p_waveformatex, &p_sys->wf, sizeof( WAVEFORMATEX ) );
input_SelectES( p_input, p_sys->p_es );
p_input->stream.p_selected_program->b_is_ok = 1;
vlc_mutex_unlock( &p_input->stream.stream_lock );
return VLC_SUCCESS;
error:
free( p_sys );
return VLC_EGENERIC;
}
/*****************************************************************************
* DemuxPCM: read packet and send them to decoders
*****************************************************************************
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
*****************************************************************************/
static int DemuxPCM( input_thread_t *p_input )
{
demux_sys_t *p_sys = p_input->p_demux_data;
pes_packet_t *p_pes;
if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
{
int64_t i_pos = stream_Tell( p_input->s );
if( p_sys->wf.nBlockAlign != 0 )
{
i_pos += p_sys->wf.nBlockAlign - i_pos % p_sys->wf.nBlockAlign;
if( stream_Seek( p_input->s, i_pos ) )
{
msg_Err( p_input, "Seek failed(cannot resync)" );
}
}
}
input_ClockManageRef( p_input,
p_input->stream.p_selected_program,
p_sys->i_time * 9 / 100 );
if( ( p_pes = stream_PesPacket( p_input->s, p_sys->i_frame_size ) )==NULL )
{
msg_Warn( p_input, "cannot read data" );
return 0;
}
p_pes->i_dts =
p_pes->i_pts = input_ClockGetTS( p_input,
p_input->stream.p_selected_program,
p_sys->i_time * 9 / 100 );
if( !p_sys->p_es->p_decoder_fifo )
{
msg_Err( p_input, "no audio decoder" );
input_DeletePES( p_input->p_method_data, p_pes );
return( -1 );
}
input_DecodePES( p_sys->p_es->p_decoder_fifo, p_pes );
p_sys->i_time += p_sys->i_frame_length;
return( 1 );
}
/*****************************************************************************
* Close: frees unused data
*****************************************************************************/
static void Close( vlc_object_t * p_this )
{
input_thread_t *p_input = (input_thread_t *)p_this;
demux_sys_t *p_sys = p_input->p_demux_data;
free( p_sys );
}