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* au.c : added au demuxer. Only ulaw/alaw/raw pcm data are supported. 

( I need some samples to do special adpcm support).
This commit is contained in:
Laurent Aimar 2003-03-11 07:03:16 +00:00
parent ae9398ed00
commit 0e1fdf57e6
3 changed files with 575 additions and 1 deletions
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2
configure.ac.in
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@ -812,7 +812,7 @@ PLUGINS="${PLUGINS} aout_file"
#PLUGINS="${PLUGINS} scope"
PLUGINS="${PLUGINS} i420_rgb i420_yuy2 i422_yuy2 i420_ymga"
PLUGINS="${PLUGINS} id3 m3u"
PLUGINS="${PLUGINS} wav araw demuxdump demuxsub adpcm a52sys"
PLUGINS="${PLUGINS} wav araw demuxdump demuxsub adpcm a52sys au"
PLUGINS="${PLUGINS} access_udp access_http ipv4 access_mms access_ftp"
PLUGINS="${PLUGINS} sap httpd"

1
modules/demux/Modules.am
View File

@ -4,3 +4,4 @@ SOURCES_ogg = modules/demux/ogg.c
SOURCES_m3u = modules/demux/m3u.c
SOURCES_demuxdump = modules/demux/demuxdump.c
SOURCES_rawdv = modules/demux/rawdv.c
SOURCES_au = modules/demux/au.c

573
modules/demux/au.c Normal file
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@ -0,0 +1,573 @@
/*****************************************************************************
* au.c : au file input module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
* $Id: au.c,v 1.1 2003/03/11 07:03:16 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 <string.h> /* strdup() */
#include <vlc/vlc.h>
#include <vlc/input.h>
#include <codecs.h>
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int AUInit ( vlc_object_t * );
static void AUEnd ( vlc_object_t * );
static int AUDemux ( input_thread_t * );
static int AUDemuxPCM ( input_thread_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_description( _("AU demuxer") );
set_capability( "demux", 142 );
set_callbacks( AUInit, AUEnd );
vlc_module_end();
#define AUDIO_FILE_ENCODING_MULAW_8 1 /* 8-bit ISDN u-law */
#define AUDIO_FILE_ENCODING_LINEAR_8 2 /* 8-bit linear PCM */
#define AUDIO_FILE_ENCODING_LINEAR_16 3 /* 16-bit linear PCM */
#define AUDIO_FILE_ENCODING_LINEAR_24 4 /* 24-bit linear PCM */
#define AUDIO_FILE_ENCODING_LINEAR_32 5 /* 32-bit linear PCM */
#define AUDIO_FILE_ENCODING_FLOAT 6 /* 32-bit IEEE floating point */
#define AUDIO_FILE_ENCODING_DOUBLE 7 /* 64-bit IEEE floating point */
#define AUDIO_FILE_ENCODING_ADPCM_G721 23 /* 4-bit CCITT g.721 ADPCM */
#define AUDIO_FILE_ENCODING_ADPCM_G722 24 /* CCITT g.722 ADPCM */
#define AUDIO_FILE_ENCODING_ADPCM_G723_3 25 /* CCITT g.723 3-bit ADPCM */
#define AUDIO_FILE_ENCODING_ADPCM_G723_5 26 /* CCITT g.723 5-bit ADPCM */
#define AUDIO_FILE_ENCODING_ALAW_8 27 /* 8-bit ISDN A-law */
typedef struct
{
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;
#define AU_DEMUX_PCM 0x01
#define AU_DEMUX_ADPCM 0x02
struct demux_sys_t
{
au_t au;
WAVEFORMATEX wf;
mtime_t i_time;
es_descriptor_t *p_es;
int i_demux;
};
/*****************************************************************************
* Declaration of local function
*****************************************************************************/
#define FREE( p ) if( p ) { free( p ); (p) = NULL; }
static uint32_t GetDWBE( uint8_t *p_buff )
{
return( ( p_buff[0] << 24 ) + ( p_buff[1] << 16 ) +
( p_buff[2] << 8 ) + p_buff[3] );
}
static off_t TellAbsolute( input_thread_t *p_input )
{
off_t i_pos;
vlc_mutex_lock( &p_input->stream.stream_lock );
i_pos= p_input->stream.p_selected_area->i_tell;
vlc_mutex_unlock( &p_input->stream.stream_lock );
return( i_pos );
}
/* return 1 if success, 0 if fail */
static int ReadData( input_thread_t *p_input, uint8_t *p_buff, int i_size )
{
data_packet_t *p_data;
int i_count = 0;
if( !i_size )
{
return( 0 );
}
do
{
int i_read;
i_read = input_SplitBuffer(p_input, &p_data, __MIN( i_size, 1024 ) );
if( i_read <= 0 )
{
return( i_count );
}
memcpy( p_buff, p_data->p_payload_start, i_read );
input_DeletePacket( p_input->p_method_data, p_data );
p_buff += i_read;
i_size -= i_read;
i_count += i_read;
} while( i_size );
return( i_count );
}
static int SeekAbsolute( input_thread_t *p_input,
off_t i_pos)
{
int i_skip;
i_skip = i_pos - TellAbsolute( p_input );
if( i_skip == 0 )
{
return( VLC_SUCCESS );
}
if( i_skip < 0 && !p_input->stream.b_seekable )
{
return( VLC_EGENERIC );
}
else if( !p_input->stream.b_seekable ||
( i_skip > 0 && i_skip < 1024 && p_input->stream.i_method != INPUT_METHOD_FILE ) )
{
while( i_skip > 0 )
{
uint8_t dummy[1024];
int i_read;
i_read = ReadData( p_input, dummy, __MIN( i_skip, 1024 ) );
if( i_read <= 0 )
{
return( VLC_EGENERIC );
}
i_skip -= i_read;
}
return( VLC_SUCCESS );
}
else
{
input_AccessReinit( p_input );
p_input->pf_seek( p_input, i_pos );
return( VLC_SUCCESS );
}
}
static int SkipBytes( input_thread_t *p_input, int i_skip )
{
return( SeekAbsolute( p_input, TellAbsolute( p_input ) + i_skip ) );
}
static int ReadPES( input_thread_t *p_input,
pes_packet_t **pp_pes,
int i_size )
{
pes_packet_t *p_pes;
*pp_pes = NULL;
if( !(p_pes = input_NewPES( p_input->p_method_data )) )
{
msg_Err( p_input, "cannot allocate new PES" );
return( VLC_EGENERIC );
}
while( i_size > 0 )
{
data_packet_t *p_data;
int i_read;
if( (i_read = input_SplitBuffer( p_input,
&p_data,
__MIN( i_size, 1024 ) ) ) <= 0 )
{
input_DeletePES( p_input->p_method_data, p_pes );
return( VLC_EGENERIC );
}
if( !p_pes->p_first )
{
p_pes->p_first = p_data;
p_pes->i_nb_data = 1;
p_pes->i_pes_size = i_read;
}
else
{
p_pes->p_last->p_next = p_data;
p_pes->i_nb_data++;
p_pes->i_pes_size += i_read;
}
p_pes->p_last = p_data;
i_size -= i_read;
}
*pp_pes = p_pes;
return( VLC_SUCCESS );
}
/*****************************************************************************
* AUInit: check file and initializes structures
*****************************************************************************/
static int AUInit( vlc_object_t * p_this )
{
input_thread_t *p_input = (input_thread_t *)p_this;
uint8_t *p_peek;
au_t au;
WAVEFORMATEX wf;
vlc_fourcc_t i_codec;
demux_sys_t *p_demux;
es_descriptor_t *p_es;
/* Initialize access plug-in structures. */
if( p_input->i_mtu == 0 )
{
/* Improve speed. */
p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE ;
}
/* a little test to see if it's a wav file */
if( input_Peek( p_input, &p_peek, 24 ) < 24 )
{
msg_Warn( p_input, "AU plugin discarded (cannot peek)" );
return( -1 );
}
/* read header */
if( strcmp( p_peek, ".snd" ) )
{
msg_Warn( p_input, "AU plugin discarded (not a valid file)" );
return( VLC_EGENERIC );
}
au.i_header_size = GetDWBE( &p_peek[0x04] );
au.i_data_size = GetDWBE( &p_peek[0x08] );
au.i_encoding = GetDWBE( &p_peek[0x0c] );
au.i_sample_rate = GetDWBE( &p_peek[0x10] );
au.i_channels = GetDWBE( &p_peek[0x14] );
msg_Dbg( p_input,
"au file: header_size=%d data_size=%d encoding=0x%x sample_rate=%d channels=%d",
au.i_header_size,
au.i_data_size,
au.i_encoding,
au.i_sample_rate,
au.i_channels );
if( au.i_header_size < 24 )
{
msg_Warn( p_input, "AU plugin discarded (not a valid file)" );
return( VLC_EGENERIC );
}
/* Create WAVEFORMATEX structure */
wf.nChannels = au.i_channels;
wf.nSamplesPerSec= au.i_sample_rate;
wf.cbSize = 0;
switch( au.i_encoding )
{
case AUDIO_FILE_ENCODING_MULAW_8: /* 8-bit ISDN u-law */
wf.wFormatTag = WAVE_FORMAT_MULAW; // FIXME ??
wf.wBitsPerSample = 8;
wf.nBlockAlign = 1 * wf.nChannels;
i_codec = VLC_FOURCC( 'u','l','a','w' );
break;
case AUDIO_FILE_ENCODING_LINEAR_8: /* 8-bit linear PCM */
wf.wFormatTag = WAVE_FORMAT_PCM;
wf.wBitsPerSample = 8;
wf.nBlockAlign = 1 * wf.nChannels;
i_codec = VLC_FOURCC( 't','w','o','s' );
break;
case AUDIO_FILE_ENCODING_LINEAR_16: /* 16-bit linear PCM */
wf.wFormatTag = WAVE_FORMAT_PCM;
wf.wBitsPerSample = 16;
wf.nBlockAlign = 2 * wf.nChannels;
i_codec = VLC_FOURCC( 't','w','o','s' );
break;
case AUDIO_FILE_ENCODING_LINEAR_24: /* 24-bit linear PCM */
wf.wFormatTag = WAVE_FORMAT_PCM;
wf.wBitsPerSample = 24;
wf.nBlockAlign = 3 * wf.nChannels;
i_codec = VLC_FOURCC( 't','w','o','s' );
break;
case AUDIO_FILE_ENCODING_LINEAR_32: /* 32-bit linear PCM */
wf.wFormatTag = WAVE_FORMAT_PCM;
wf.wBitsPerSample = 32;
wf.nBlockAlign = 4 * wf.nChannels;
i_codec = VLC_FOURCC( 't','w','o','s' );
break;
case AUDIO_FILE_ENCODING_FLOAT: /* 32-bit IEEE floating point */
wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
wf.wBitsPerSample = 32;
wf.nBlockAlign = 4 * wf.nChannels;
i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_FLOAT );
break;
case AUDIO_FILE_ENCODING_DOUBLE: /* 64-bit IEEE floating point */
wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
wf.wBitsPerSample = 64;
wf.nBlockAlign = 8 * wf.nChannels;
i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_DOUBLE );
break;
case AUDIO_FILE_ENCODING_ADPCM_G721: /* 4-bit CCITT g.721 ADPCM */
wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
wf.wBitsPerSample = 0;
wf.nBlockAlign = 0 * wf.nChannels;
i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_ADPCM_G721 );
break;
case AUDIO_FILE_ENCODING_ADPCM_G722: /* CCITT g.722 ADPCM */
wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
wf.wBitsPerSample = 0;
wf.nBlockAlign = 0 * wf.nChannels;
i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_ADPCM_G722 );
break;
case AUDIO_FILE_ENCODING_ADPCM_G723_3: /* CCITT g.723 3-bit ADPCM */
wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
wf.wBitsPerSample = 0;
wf.nBlockAlign = 0 * wf.nChannels;
i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_ADPCM_G723_3 );
break;
case AUDIO_FILE_ENCODING_ADPCM_G723_5: /* CCITT g.723 5-bit ADPCM */
wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
wf.wBitsPerSample = 0;
wf.nBlockAlign = 0 * wf.nChannels;
i_codec = VLC_FOURCC( 'a', 'u', 0, AUDIO_FILE_ENCODING_ADPCM_G723_5 );
break;
case AUDIO_FILE_ENCODING_ALAW_8: /* 8-bit ISDN A-law */
wf.wFormatTag = WAVE_FORMAT_ALAW; // FIXME ??
wf.wBitsPerSample = 8;
wf.nBlockAlign = 1 * wf.nChannels;
i_codec = VLC_FOURCC( 'a','l','a','w' );
break;
default:
msg_Warn( p_input, "unknow encoding=0x%x", au.i_encoding );
wf.wFormatTag = WAVE_FORMAT_UNKNOWN;
wf.wBitsPerSample = 0;
wf.nBlockAlign = 0 * wf.nChannels;
i_codec = VLC_FOURCC( 'a','u', 0, au.i_encoding );
break;
}
wf.nAvgBytesPerSec = wf.nSamplesPerSec * wf.nChannels * wf.wBitsPerSample / 8;
/* 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" );
return( VLC_EGENERIC );
}
if( input_AddProgram( p_input, 0, 0) == NULL )
{
vlc_mutex_unlock( &p_input->stream.stream_lock );
msg_Err( p_input, "cannot add program" );
return( VLC_EGENERIC );
}
p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
p_input->stream.i_mux_rate = wf.nAvgBytesPerSec / 50;
p_es = input_AddES( p_input,
p_input->stream.p_selected_program,
0x01,
0 );
p_es->i_stream_id = 0x01;
p_es->i_cat = AUDIO_ES;
p_es->i_fourcc = i_codec;
p_es->p_waveformatex= malloc( sizeof( WAVEFORMATEX ) );
memcpy( p_es->p_waveformatex,
&wf,
sizeof( WAVEFORMATEX ) );
input_SelectES( p_input, p_es );
p_input->stream.p_selected_program->b_is_ok = 1;
vlc_mutex_unlock( &p_input->stream.stream_lock );
/* create our structure that will contains all data */
if( ( p_demux = malloc( sizeof( demux_sys_t ) ) ) == NULL )
{
msg_Err( p_input, "out of memory" );
return( VLC_EGENERIC );
}
p_demux->p_es = p_es;
p_demux->i_time = 0;
memcpy( &p_demux->au, &au, sizeof( au_t ) );
memcpy( &p_demux->wf, &wf, sizeof( WAVEFORMATEX ) );
switch( au.i_encoding )
{
case AUDIO_FILE_ENCODING_MULAW_8:
case AUDIO_FILE_ENCODING_LINEAR_8:
case AUDIO_FILE_ENCODING_LINEAR_16:
case AUDIO_FILE_ENCODING_LINEAR_24:
case AUDIO_FILE_ENCODING_LINEAR_32:
case AUDIO_FILE_ENCODING_FLOAT:
case AUDIO_FILE_ENCODING_DOUBLE:
case AUDIO_FILE_ENCODING_ALAW_8:
p_demux->i_demux = AU_DEMUX_PCM;
break;
case AUDIO_FILE_ENCODING_ADPCM_G721:
case AUDIO_FILE_ENCODING_ADPCM_G722:
case AUDIO_FILE_ENCODING_ADPCM_G723_3:
case AUDIO_FILE_ENCODING_ADPCM_G723_5:
p_demux->i_demux = AU_DEMUX_ADPCM;
break;
default:
p_demux->i_demux = 0;
break;
}
p_input->p_demux_data = p_demux;
p_input->pf_demux = AUDemux;
/* skip header*/
SkipBytes( p_input, au.i_header_size );
return( VLC_SUCCESS );
}
/*****************************************************************************
* AUDemux: read packet and send them to decoders
*****************************************************************************
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
*****************************************************************************/
static int AUDemux( input_thread_t *p_input )
{
demux_sys_t *p_demux = p_input->p_demux_data;
if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
{
off_t i_offset;
i_offset = TellAbsolute( p_input ) - p_demux->au.i_header_size;
if( i_offset < 0 )
{
i_offset = 0;
}
if( p_demux->wf.nBlockAlign != 0 )
{
i_offset += p_demux->wf.nBlockAlign -
i_offset % p_demux->wf.nBlockAlign;
}
SeekAbsolute( p_input, p_demux->au.i_header_size + i_offset );
}
input_ClockManageRef( p_input,
p_input->stream.p_selected_program,
p_demux->i_time * 9 / 100 );
switch( p_demux->i_demux )
{
case AU_DEMUX_PCM:
return( AUDemuxPCM( p_input ) );
case AU_DEMUX_ADPCM:
default:
msg_Err( p_input, "Internal error (p_demux->i_demux invalid/unsported)" );
return( 0 );
}
}
static int AUDemuxPCM( input_thread_t *p_input )
{
demux_sys_t *p_demux = p_input->p_demux_data;
pes_packet_t *p_pes;
int i_samples;
int i_bytes;
int i_modulo;
/* read samples for 50ms of */
i_samples = __MAX( p_demux->wf.nSamplesPerSec / 20, 1 );
i_bytes = i_samples * p_demux->wf.nChannels * ( (p_demux->wf.wBitsPerSample + 7) / 8 );
if( p_demux->wf.nBlockAlign > 0 )
{
if( ( i_modulo = i_bytes % p_demux->wf.nBlockAlign ) != 0 )
{
i_bytes += p_demux->wf.nBlockAlign - i_modulo;
}
}
if( ReadPES( p_input, &p_pes, i_bytes ) )
{
msg_Warn( p_input, "failed to get one frame" );
return( 0 );
}
p_pes->i_dts =
p_pes->i_pts = input_ClockGetTS( p_input,
p_input->stream.p_selected_program,
p_demux->i_time * 9 / 100 );
if( !p_demux->p_es->p_decoder_fifo )
{
msg_Err( p_input, "no audio decoder" );
input_DeletePES( p_input->p_method_data, p_pes );
return( -1 );
}
else
{
input_DecodePES( p_demux->p_es->p_decoder_fifo, p_pes );
}
p_demux->i_time += (mtime_t)1000000 *
(mtime_t)i_samples /
(mtime_t)p_demux->wf.nSamplesPerSec;
return( 1 );
}
/*****************************************************************************
* AUEnd: frees unused data
*****************************************************************************/
static void AUEnd ( vlc_object_t * p_this )
{
input_thread_t * p_input = (input_thread_t *)p_this;
FREE( p_input->p_demux_data );
}