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/* $Id: Mpeg4Encoder.cpp,v 1.23 2003/10/09 13:24:48 titer Exp $
This file is part of the HandBrake source code.
Homepage: <http://beos.titer.org/handbrake/>.
It may be used under the terms of the GNU General Public License. */
#include "Mpeg4Encoder.h"
#include "Manager.h"
#include "Fifo.h"
#include <ffmpeg/avcodec.h>
HBMpeg4Encoder::HBMpeg4Encoder( HBManager * manager, HBTitle * title )
{
fManager = manager;
fTitle = title;
fLock = new HBLock();
fUsed = false;
fPass = 42;
fMpeg4Buffer = NULL;
fFile = NULL;
fFrame = avcodec_alloc_frame();
fLog = NULL;
}
bool HBMpeg4Encoder::Work()
{
if( !Lock() )
{
return false;
}
bool didSomething = false;
for( ;; )
{
if( fMpeg4Buffer )
{
if( fTitle->fMpeg4Fifo->Push( fMpeg4Buffer ) )
{
fMpeg4Buffer = NULL;
}
else
{
break;
}
}
if( !( fResizedBuffer = fTitle->fResizedFifo->Pop() ) )
{
break;
}
if( fResizedBuffer->fPass != fPass )
{
fPass = fResizedBuffer->fPass;
Init();
}
fManager->SetPosition( fResizedBuffer->fPosition );
EncodeBuffer();
didSomething = true;
}
Unlock();
return didSomething;
}
bool HBMpeg4Encoder::Lock()
{
fLock->Lock();
if( fUsed )
{
fLock->Unlock();
return false;
}
fUsed = true;
fLock->Unlock();
return true;
}
void HBMpeg4Encoder::Unlock()
{
fLock->Lock();
fUsed = false;
fLock->Unlock();
}
void HBMpeg4Encoder::Init()
{
/* Clean up if needed */
if( fFile )
{
fclose( fFile );
}
AVCodec * codec = avcodec_find_encoder( CODEC_ID_MPEG4 );
if( !codec )
{
Log( "HBMpeg4Encoder: avcodec_find_encoder() failed" );
fManager->Error( HB_ERROR_MPEG4_INIT );
return;
}
fContext = avcodec_alloc_context();
fContext->bit_rate = 1024 * fTitle->fBitrate;
fContext->bit_rate_tolerance = 1024 * fTitle->fBitrate;
fContext->width = fTitle->fOutWidth;
fContext->height = fTitle->fOutHeight;
fContext->frame_rate = fTitle->fRate;
fContext->frame_rate_base = fTitle->fScale;
fContext->gop_size = 10 * fTitle->fRate / fTitle->fScale;
if( fPass == 1 )
{
fContext->flags |= CODEC_FLAG_PASS1;
char fileName[1024]; memset( fileName, 0, 1024 );
sprintf( fileName, "/tmp/HB.%d.ffmpeg.log", fManager->GetPid() );
fFile = fopen( fileName, "w" );
}
else if( fPass == 2 )
{
fContext->flags |= CODEC_FLAG_PASS2;
char fileName[1024]; memset( fileName, 0, 1024 );
sprintf( fileName, "/tmp/HB.%d.ffmpeg.log", fManager->GetPid() );
fFile = fopen( fileName, "r" );
fseek( fFile, 0, SEEK_END );
uint32_t size = ftell( fFile );
fLog = (char*) malloc( size + 1 );
fseek( fFile, 0, SEEK_SET );
fread( fLog, size, 1, fFile );
fclose( fFile );
fLog[size] = '\0';
fContext->stats_in = fLog;
}
if( avcodec_open( fContext, codec ) < 0 )
{
Log( "HBMpeg4Encoder: avcodec_open() failed" );
fManager->Error( HB_ERROR_MPEG4_INIT );
return;
}
}
void HBMpeg4Encoder::EncodeBuffer()
{
fFrame->data[0] = fResizedBuffer->fData;
fFrame->data[1] = fFrame->data[0] + fTitle->fOutWidth *
fTitle->fOutHeight;
fFrame->data[2] = fFrame->data[1] + fTitle->fOutWidth *
fTitle->fOutHeight / 4;
fFrame->linesize[0] = fTitle->fOutWidth;
fFrame->linesize[1] = fTitle->fOutWidth / 2;
fFrame->linesize[2] = fTitle->fOutWidth / 2;
fMpeg4Buffer = new HBBuffer( 3 * fTitle->fOutWidth *
fTitle->fOutHeight / 2 );
/* Should be really too much... */
fMpeg4Buffer->fPosition = fResizedBuffer->fPosition;
fMpeg4Buffer->fSize =
avcodec_encode_video( fContext, fMpeg4Buffer->fData,
fMpeg4Buffer->fAllocSize, fFrame );
fMpeg4Buffer->fKeyFrame = ( fContext->coded_frame->key_frame != 0 );
if( fResizedBuffer->fPass == 1 )
{
if( fContext->stats_out )
{
fprintf( fFile, "%s", fContext->stats_out );
}
delete fMpeg4Buffer;
fMpeg4Buffer = NULL;
}
delete fResizedBuffer;
fResizedBuffer = NULL;
}
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