Commit 5cb3ffde authored by Laurent Aimar's avatar Laurent Aimar
Browse files

* wav: remove old wav demuxer.

parent 564ef96a
.deps
.dirstamp
*.lo
*.la
*.dll
*.dylib
*.sl
*.so
Makefile.am
Makefile.in
Makefile
SOURCES_wav = \
wav.c \
wav.h \
$(NULL)
/*****************************************************************************
* wav.c : wav file input module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
* $Id: wav.c,v 1.16 2003/05/21 10:02:55 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>
#include "wav.h"
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int WAVInit ( vlc_object_t * );
static void __WAVEnd ( vlc_object_t * );
static int WAVDemux ( input_thread_t * );
static int WAVCallDemux ( input_thread_t * );
#define WAVEnd(a) __WAVEnd(VLC_OBJECT(a))
/*****************************************************************************
* Module descriptor
*****************************************************************************/
vlc_module_begin();
set_description( _("WAV demuxer") );
set_capability( "demux", 142 );
set_callbacks( WAVInit, __WAVEnd );
vlc_module_end();
/*****************************************************************************
* Declaration of local function
*****************************************************************************/
#define FREE( p ) if( p ) free( p ); (p) = NULL
#define __EVEN( x ) ( (x)%2 != 0 ) ? ((x)+1) : (x)
/* Some functions to manipulate memory */
static uint16_t GetWLE( uint8_t *p_buff )
{
return( (p_buff[0]) + ( p_buff[1] <<8 ) );
}
static uint32_t GetDWLE( uint8_t *p_buff )
{
return( p_buff[0] + ( p_buff[1] <<8 ) +
( p_buff[2] <<16 ) + ( p_buff[3] <<24 ) );
}
static uint32_t CreateDWLE( int a, int b, int c, int d )
{
return( a + ( b << 8 ) + ( c << 16 ) + ( d << 24 ) );
}
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;
#if 0
if( i_pos >= p_input->stream.p_selected_area->i_size )
{
return( 0 );
}
#endif
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( 0 );
}
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( 0 );
}
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( 1 );
}
static int FindTag( input_thread_t *p_input, uint32_t i_tag )
{
uint32_t i_id;
uint32_t i_size;
uint8_t *p_peek;
for( ;; )
{
if( input_Peek( p_input, &p_peek, 8 ) < 8 )
{
msg_Err( p_input, "cannot peek()" );
return( 0 );
}
i_id = GetDWLE( p_peek );
i_size = GetDWLE( p_peek + 4 );
msg_Dbg( p_input, "FindTag: tag:%4.4s size:%d", (char*)&i_id, i_size );
if( i_id == i_tag )
{
/* Yes, we have found the good tag */
return( 1 );
}
if( SkipBytes( p_input, __EVEN( i_size ) + 8 ) )
{
return( 0 );
}
}
}
static int LoadTag_fmt( input_thread_t *p_input,
demux_sys_t *p_demux )
{
uint8_t *p_peek;
uint32_t i_size;
WAVEFORMATEX *p_wf;
if( input_Peek( p_input, &p_peek , 8 ) < 8 )
{
return( 0 );
}
p_demux->i_wf = i_size = GetDWLE( p_peek + 4 );
SkipBytes( p_input, 8 );
if( i_size < 16 )
{
SkipBytes( p_input, i_size );
return( 0 );
}
p_wf = p_demux->p_wf = malloc( __MAX( i_size, sizeof( WAVEFORMATEX) ) );
ReadData( p_input, (uint8_t*)p_wf, __EVEN( i_size ) );
p_wf->wFormatTag = GetWLE( (uint8_t*)&p_demux->p_wf->wFormatTag );
p_wf->nChannels = GetWLE( (uint8_t*)&p_demux->p_wf->nChannels );
p_wf->nSamplesPerSec = GetWLE( (uint8_t*)&p_demux->p_wf->nSamplesPerSec );
p_wf->nAvgBytesPerSec = GetWLE( (uint8_t*)&p_demux->p_wf->nAvgBytesPerSec );
p_wf->nBlockAlign = GetWLE( (uint8_t*)&p_demux->p_wf->nBlockAlign );
p_wf->wBitsPerSample = GetWLE( (uint8_t*)&p_demux->p_wf->wBitsPerSample );
if( i_size >= sizeof( WAVEFORMATEX) )
{
p_wf->cbSize = GetWLE( (uint8_t*)&p_demux->p_wf->cbSize );
}
else
{
p_wf->cbSize = 0;
}
msg_Dbg( p_input, "loaded \"fmt \" chunk" );
return( 1 );
}
static int PCM_GetFrame( input_thread_t *p_input,
WAVEFORMATEX *p_wf,
pes_packet_t **pp_pes,
mtime_t *pi_length )
{
int i_samples;
int i_bytes;
int i_modulo;
/* read samples for 50ms of */
i_samples = __MAX( p_wf->nSamplesPerSec / 20, 1 );
*pi_length = (mtime_t)1000000 *
(mtime_t)i_samples /
(mtime_t)p_wf->nSamplesPerSec;
i_bytes = i_samples * p_wf->nChannels * ( (p_wf->wBitsPerSample + 7) / 8 );
if( p_wf->nBlockAlign > 0 )
{
if( ( i_modulo = i_bytes % p_wf->nBlockAlign ) != 0 )
{
i_bytes += p_wf->nBlockAlign - i_modulo;
}
}
return( ReadPES( p_input, pp_pes, i_bytes ) );
}
static int MS_ADPCM_GetFrame( input_thread_t *p_input,
WAVEFORMATEX *p_wf,
pes_packet_t **pp_pes,
mtime_t *pi_length )
{
int i_samples;
i_samples = 2 + 2 * ( p_wf->nBlockAlign -
7 * p_wf->nChannels ) / p_wf->nChannels;
*pi_length = (mtime_t)1000000 *
(mtime_t)i_samples /
(mtime_t)p_wf->nSamplesPerSec;
return( ReadPES( p_input, pp_pes, p_wf->nBlockAlign ) );
}
static int IMA_ADPCM_GetFrame( input_thread_t *p_input,
WAVEFORMATEX *p_wf,
pes_packet_t **pp_pes,
mtime_t *pi_length )
{
int i_samples;
i_samples = 2 * ( p_wf->nBlockAlign -
4 * p_wf->nChannels ) / p_wf->nChannels;
*pi_length = (mtime_t)1000000 *
(mtime_t)i_samples /
(mtime_t)p_wf->nSamplesPerSec;
return( ReadPES( p_input, pp_pes, p_wf->nBlockAlign ) );
}
/*****************************************************************************
* WAVInit: check file and initializes structures
*****************************************************************************/
static int WAVInit( vlc_object_t * p_this )
{
input_thread_t *p_input = (input_thread_t *)p_this;
uint8_t *p_peek;
uint32_t i_size;
demux_sys_t *p_demux;
/* 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, 12 ) < 12 )
{
msg_Warn( p_input, "WAV plugin discarded (cannot peek)" );
return( -1 );
}
if( ( GetDWLE( p_peek ) != CreateDWLE( 'R', 'I', 'F', 'F' ) )||
( GetDWLE( p_peek + 8 ) != CreateDWLE( 'W', 'A', 'V', 'E' ) ) )
{
msg_Warn( p_input, "WAV plugin discarded (not a valid file)" );
return( -1 );
}
i_size = GetDWLE( p_peek + 4 );
SkipBytes( p_input, 12 );
if( !FindTag( p_input, CreateDWLE( 'f', 'm', 't' ,' ' ) ) )
{
msg_Err( p_input, "cannot find \"fmt \" tag" );
return( -1 );
}
/* create our structure that will contains all data */
if( !( p_input->p_demux_data =
p_demux = malloc( sizeof( demux_sys_t ) ) ) )
{
msg_Err( p_input, "out of memory" );
return( -1 );
}
memset( p_demux, 0, sizeof( demux_sys_t ) );
/* Load WAVEFORMATEX header */
if( !LoadTag_fmt( p_input, p_demux ) )
{
msg_Err( p_input, "cannot load \"fmt \" tag" );
FREE( p_demux );
return( -1 );
}
msg_Dbg( p_input, "format:0x%4.4x channels:%d %dHz %dKo/s blockalign:%d bits/samples:%d extra size:%d",
p_demux->p_wf->wFormatTag,
p_demux->p_wf->nChannels,
p_demux->p_wf->nSamplesPerSec,
p_demux->p_wf->nAvgBytesPerSec / 1024,
p_demux->p_wf->nBlockAlign,
p_demux->p_wf->wBitsPerSample,
p_demux->p_wf->cbSize );
if( !FindTag( p_input, CreateDWLE( 'd', 'a', 't', 'a' ) ) )
{
msg_Err( p_input, "cannot find \"data\" tag" );
FREE( p_demux->p_wf );
FREE( p_demux );
return( -1 );
}
if( input_Peek( p_input, &p_peek, 8 ) < 8 )
{
msg_Warn( p_input, "WAV plugin discarded (cannot peek)" );
FREE( p_demux->p_wf );
FREE( p_demux );
return( -1 );
}
p_demux->i_data_pos = TellAbsolute( p_input ) + 8;
p_demux->i_data_size = GetDWLE( p_peek + 4 );
SkipBytes( p_input, 8 );
/* XXX p_demux->psz_demux shouldn't be NULL ! */
switch( p_demux->p_wf->wFormatTag )
{
case( WAVE_FORMAT_PCM ):
msg_Dbg( p_input,"found raw pcm audio format" );
p_demux->i_fourcc = VLC_FOURCC( 'a', 'r', 'a', 'w' );
p_demux->GetFrame = PCM_GetFrame;
p_demux->psz_demux = strdup( "" );
break;
case( WAVE_FORMAT_MULAW ):
msg_Dbg( p_input,"found mulaw pcm audio format" );
p_demux->i_fourcc = VLC_FOURCC( 'u', 'l', 'a', 'w' );
p_demux->GetFrame = PCM_GetFrame;
p_demux->psz_demux = strdup( "" );
break;
case( WAVE_FORMAT_ALAW ):
msg_Dbg( p_input,"found alaw pcm audio format" );
p_demux->i_fourcc = VLC_FOURCC( 'a', 'l', 'a', 'w' );
p_demux->GetFrame = PCM_GetFrame;
p_demux->psz_demux = strdup( "" );
break;
case( WAVE_FORMAT_MPEG ):
case( WAVE_FORMAT_MPEGLAYER3 ):
msg_Dbg( p_input, "found mpeg audio format" );
p_demux->i_fourcc = VLC_FOURCC( 'm', 'p', 'g', 'a' );
p_demux->GetFrame = NULL;
p_demux->psz_demux = strdup( "mpegaudio" );
break;
case( WAVE_FORMAT_A52 ):
msg_Dbg( p_input,"found a52 audio format" );
p_demux->i_fourcc = VLC_FOURCC( 'a', '5', '2', ' ' );
p_demux->GetFrame = NULL;
p_demux->psz_demux = strdup( "a52" );
break;
case( WAVE_FORMAT_ADPCM ):
msg_Dbg( p_input, "found ms adpcm audio format" );
p_demux->i_fourcc = VLC_FOURCC( 'm', 's', 0x00, 0x02 );
p_demux->GetFrame = MS_ADPCM_GetFrame;
p_demux->psz_demux = strdup( "" );
break;
case( WAVE_FORMAT_IMA_ADPCM ):
msg_Dbg( p_input, "found ima adpcm audio format" );
p_demux->i_fourcc = VLC_FOURCC( 'm', 's', 0x00, 0x11 );
p_demux->GetFrame = IMA_ADPCM_GetFrame;
p_demux->psz_demux = strdup( "" );
break;
default:
msg_Warn( p_input,"unrecognize audio format(0x%x)",
p_demux->p_wf->wFormatTag );
p_demux->i_fourcc =
VLC_FOURCC( 'm', 's',
(p_demux->p_wf->wFormatTag >> 8)&0xff,
(p_demux->p_wf->wFormatTag )&0xff);
p_demux->GetFrame = NULL;
p_demux->psz_demux = strdup( "" );
break;
}
if( p_demux->GetFrame )
{
msg_Dbg( p_input, "using internal demux" );
p_input->pf_demux = WAVDemux;
p_input->p_demux_data = p_demux;
/* 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" );
// FIXME
return( -1 );
}
if( input_AddProgram( p_input, 0, 0) == NULL )
{
vlc_mutex_unlock( &p_input->stream.stream_lock );
msg_Err( p_input, "cannot add program" );
// FIXME
return( -1 );
}
p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
p_input->stream.i_mux_rate = 0 ; /* FIXME */
p_demux->p_es = input_AddES( p_input,
p_input->stream.p_selected_program,
1, AUDIO_ES, NULL, 0 );
p_demux->p_es->i_stream_id = 1;
p_demux->p_es->i_fourcc = p_demux->i_fourcc;
p_demux->p_es->p_waveformatex = malloc( p_demux->i_wf );
memcpy( p_demux->p_es->p_waveformatex, p_demux->p_wf, p_demux->i_wf );
input_SelectES( p_input, p_demux->p_es );
p_input->stream.p_selected_program->b_is_ok = 1;
vlc_mutex_unlock( &p_input->stream.stream_lock );
}
else
{
char *psz_sav;
/* call an external demux */
msg_Warn( p_input, "unsupported formattag, using external demux" );
psz_sav = p_input->psz_demux;
p_input->psz_demux = p_demux->psz_demux;
p_demux->p_demux = module_Need( p_input, "demux", NULL );
p_input->psz_demux = psz_sav;
if( !p_demux->p_demux )
{
msg_Err( p_input,
"cannot get external demux for formattag 0x%x",
p_demux->p_wf->wFormatTag );
FREE( p_demux->psz_demux );
FREE( p_demux->p_wf );
FREE( p_demux );
return( -1 );
}
/* save value and switch back */
p_demux->pf_demux = p_input->pf_demux;
p_demux->p_demux_data = p_input->p_demux_data;
p_input->pf_demux = WAVCallDemux;
p_input->p_demux_data = p_demux;
}
return( 0 );
}
/*****************************************************************************
* WAVCallDemux: call true demux
*****************************************************************************
* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
*****************************************************************************/
static int WAVCallDemux( input_thread_t *p_input )
{
demux_sys_t *p_demux = p_input->p_demux_data;
int i_status;
char *psz_sav;
/* save context */
psz_sav = p_input->psz_demux;
/* switch context */
p_input->pf_demux = p_demux->pf_demux;
p_input->p_demux_data = p_demux->p_demux_data;
p_input->psz_demux = p_demux->psz_demux;