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/* $Id: Scale.c,v 1.4 2003/11/06 13:03:19 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 "Fifo.h"
#include "Scale.h"
#include "Work.h"
#include <ffmpeg/avcodec.h>
/* Local prototypes */
static int ScaleWork( HBWork * );
struct HBScale
{
HB_WORK_COMMON_MEMBERS
HBHandle * handle;
HBTitle * title;
ImgReSampleContext * context;
AVPicture rawPicture;
HBBuffer * deintBuffer;
AVPicture deintPicture;
HBBuffer * scaledBuffer;
AVPicture scaledPicture;
};
HBScale * HBScaleInit( HBHandle * handle, HBTitle * title )
{
HBScale * s;
if( !( s = malloc( sizeof( HBScale ) ) ) )
{
HBLog( "HBScaleInit: malloc() failed, gonna crash" );
return NULL;
}
s->name = strdup( "Scale" );
s->work = ScaleWork;
s->handle = handle;
s->title = title;
/* Init libavcodec */
s->context =
img_resample_full_init( title->outWidth, title->outHeight,
title->inWidth, title->inHeight,
title->topCrop, title->bottomCrop,
title->leftCrop, title->rightCrop );
/* Allocate a constant buffer used for deinterlacing */
s->deintBuffer = HBBufferInit( 3 * title->inWidth *
title->inHeight / 2 );
avpicture_fill( &s->deintPicture, s->deintBuffer->data,
PIX_FMT_YUV420P, title->inWidth, title->inHeight );
s->scaledBuffer = NULL;
return s;
}
void HBScaleClose( HBScale ** _s )
{
HBScale * s = *_s;
img_resample_close( s->context );
HBBufferClose( &s->deintBuffer );
free( s->name );
free( s );
*_s = NULL;
}
static int ScaleWork( HBWork * w )
{
HBScale * s = (HBScale*) w;
HBTitle * title = s->title;
HBBuffer * rawBuffer;
int didSomething = 0;
/* Push scaled buffer */
if( s->scaledBuffer )
{
if( HBFifoPush( title->scaledFifo, &s->scaledBuffer ) )
{
didSomething = 1;
}
else
{
return didSomething;
}
}
/* Get a new raw picture */
if( ( rawBuffer = HBFifoPop( title->rawFifo ) ) )
{
didSomething = 1;
}
else
{
return didSomething;
}
/* Allocate new buffer for the scaled picture */
s->scaledBuffer = HBBufferInit( 3 * title->outWidth *
title->outHeight / 2 );
s->scaledBuffer->position = rawBuffer->position;
s->scaledBuffer->pass = rawBuffer->pass;
/* libavcodec stuff */
avpicture_fill( &s->rawPicture, rawBuffer->data, PIX_FMT_YUV420P,
title->inWidth, title->inHeight );
avpicture_fill( &s->scaledPicture, s->scaledBuffer->data,
PIX_FMT_YUV420P, title->outWidth,
title->outHeight );
/* Do the job */
if( title->deinterlace )
{
avpicture_deinterlace( &s->deintPicture, &s->rawPicture,
PIX_FMT_YUV420P, title->inWidth,
title->inHeight );
img_resample( s->context, &s->scaledPicture,
&s->deintPicture );
}
else
{
img_resample( s->context, &s->scaledPicture, &s->rawPicture );
}
/* Free memory */
HBBufferClose( &rawBuffer );
return didSomething;
}
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