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/* $Id: Mpeg2Dec.c,v 1.12 2004/01/16 19:04:04 titer Exp $
This file is part of the HandBrake source code.
Homepage: <http://handbrake.m0k.org/>.
It may be used under the terms of the GNU General Public License. */
#include "HBInternal.h"
#include "mpeg2dec/mpeg2.h"
typedef struct HBMpeg2Dec
{
HB_WORK_COMMON_MEMBERS
HBHandle * handle;
HBTitle * title;
HBList * rawBufferList;
int pass;
mpeg2dec_t * libmpeg2;
const mpeg2_info_t * info;
int lateField;
} HBMpeg2Dec;
/* Local prototypes */
static int Mpeg2DecWork( HBWork * );
HBWork * HBMpeg2DecInit( HBHandle * handle, HBTitle * title )
{
HBMpeg2Dec * m ;
if( !( m = malloc( sizeof( HBMpeg2Dec ) ) ) )
{
HBLog( "HBMpeg2Dec: malloc() failed, gonna crash" );
return NULL;
}
m->name = strdup( "Mpeg2Dec" );
m->work = Mpeg2DecWork;
m->handle = handle;
m->title = title;
m->rawBufferList = HBListInit();
m->pass = 42;
m->libmpeg2 = NULL;
m->info = NULL;
m->lateField = 0;
return (HBWork*) m;
}
void HBMpeg2DecClose( HBWork ** _m )
{
HBBuffer * buffer;
HBMpeg2Dec * m = (HBMpeg2Dec*) *_m;
if( m->libmpeg2 )
{
HBLog( "HBMpeg2Dec: closing libmpeg2 (pass %d)", m->pass );
mpeg2_close( m->libmpeg2 );
}
while( ( buffer = HBListItemAt( m->rawBufferList, 0 ) ) )
{
HBListRemove( m->rawBufferList, buffer );
HBBufferClose( &buffer );
}
HBListClose( &m->rawBufferList );
free( m->name );
free( m );
*_m = NULL;
}
static int Mpeg2DecWork( HBWork * w )
{
HBMpeg2Dec * m = (HBMpeg2Dec*) w;
HBTitle * title = m->title;
HBBuffer * mpeg2Buffer;
HBBuffer * rawBuffer;
HBBuffer * tmpBuffer;
mpeg2_state_t state;
int didSomething = 0;
/* Push decoded buffers */
while( ( rawBuffer = (HBBuffer*)
HBListItemAt( m->rawBufferList, 0 ) ) )
{
tmpBuffer = rawBuffer;
if( HBFifoPush( title->rawFifo, &rawBuffer ) )
{
didSomething = 1;
HBListRemove( m->rawBufferList, tmpBuffer );
}
else
{
return didSomething;
}
}
/* Get a new buffer to decode */
if( ( mpeg2Buffer = HBFifoPop( title->inFifo ) ) )
{
didSomething = 1;
}
else
{
return didSomething;
}
/* Init or re-init if needed */
if( mpeg2Buffer->pass != m->pass )
{
if( m->libmpeg2 )
{
HBLog( "HBMpeg2Dec: closing libmpeg2 (pass %d)", m->pass );
mpeg2_close( m->libmpeg2 );
}
m->pass = mpeg2Buffer->pass;
HBLog( "HBMpeg2Dec: opening libmpeg2 (pass %d)", m->pass );
#ifdef HB_NOMMX
mpeg2_accel( 0 );
#endif
m->libmpeg2 = mpeg2_init();
m->info = mpeg2_info( m->libmpeg2 );
m->lateField = 0;
}
/* Decode */
mpeg2_buffer( m->libmpeg2, mpeg2Buffer->data,
mpeg2Buffer->data + mpeg2Buffer->size );
for( ;; )
{
state = mpeg2_parse( m->libmpeg2 );
if( state == STATE_BUFFER )
{
break;
}
else if( ( state == STATE_SLICE || state == STATE_END ) &&
m->info->display_fbuf )
{
rawBuffer = HBBufferInit( 3 * title->inWidth *
title->inHeight );
/* TODO: make libmpeg2 write directly in our buffer */
memcpy( rawBuffer->data, m->info->display_fbuf->buf[0],
title->inWidth * title->inHeight );
memcpy( rawBuffer->data + title->inWidth * title->inHeight,
m->info->display_fbuf->buf[1],
title->inWidth * title->inHeight / 4 );
memcpy( rawBuffer->data + title->inWidth * title->inHeight +
title->inWidth * title->inHeight / 4,
m->info->display_fbuf->buf[2],
title->inWidth * title->inHeight / 4 );
rawBuffer->position = mpeg2Buffer->position;
rawBuffer->pass = mpeg2Buffer->pass;
HBListAdd( m->rawBufferList, rawBuffer );
/* NTSC pulldown kludge */
if( m->info->display_picture->nb_fields == 3 )
{
rawBuffer->repeat = m->lateField;
m->lateField = !m->lateField;
}
else
{
rawBuffer->repeat = 0;
}
}
else if( state == STATE_INVALID )
{
/* Shouldn't happen on a DVD */
HBLog( "HBMpeg2Dec: STATE_INVALID" );
}
}
HBBufferClose( &mpeg2Buffer );
return didSomething;
}
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