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Copy pathInputStream.cpp
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134 lines (109 loc) · 2.86 KB
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Copy pathInputStream.cpp
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134 lines (109 loc) · 2.86 KB
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#include "InputStream.hpp"
#include <AvTranscoder/file/InputFile.hpp>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
}
#include <stdexcept>
#include <cassert>
namespace avtranscoder
{
InputStream::InputStream( InputFile& inputFile, const size_t streamIndex )
: IInputStream( )
, _inputFile( &inputFile )
, _codec( NULL )
, _streamCache()
, _streamIndex( streamIndex )
, _isActivated( false )
{
AVCodecContext* context = _inputFile->getFormatContext().getAVStream( _streamIndex ).codec;
switch( context->codec_type )
{
case AVMEDIA_TYPE_VIDEO:
{
_codec = new VideoCodec( eCodecTypeDecoder, *context );
break;
}
case AVMEDIA_TYPE_AUDIO:
{
_codec = new AudioCodec( eCodecTypeDecoder, *context );
break;
}
case AVMEDIA_TYPE_DATA:
{
_codec = new DataCodec( eCodecTypeDecoder, *context );
break;
}
default:
break;
}
}
InputStream::~InputStream( )
{
delete _codec;
}
bool InputStream::readNextPacket( CodedData& data )
{
if( ! _isActivated )
throw std::runtime_error( "Can't read packet on non-activated input stream." );
// if packet is already cached
if( ! _streamCache.empty() )
{
data.copyData( _streamCache.front().getData(), _streamCache.front().getSize() );
_streamCache.pop();
}
// else read next packet
else
{
return _inputFile->readNextPacket( data, _streamIndex ) && _streamCache.empty();
}
return true;
}
VideoCodec& InputStream::getVideoCodec()
{
assert( _streamIndex <= _inputFile->getFormatContext().getNbStreams() );
if( getStreamType() != AVMEDIA_TYPE_VIDEO )
{
throw std::runtime_error( "unable to get video descriptor on non-video stream" );
}
return *static_cast<VideoCodec*>( _codec );
}
AudioCodec& InputStream::getAudioCodec()
{
assert( _streamIndex <= _inputFile->getFormatContext().getNbStreams() );
if( getStreamType() != AVMEDIA_TYPE_AUDIO )
{
throw std::runtime_error( "unable to get audio descriptor on non-audio stream" );
}
return *static_cast<AudioCodec*>( _codec );
}
DataCodec& InputStream::getDataCodec()
{
assert( _streamIndex <= _inputFile->getFormatContext().getNbStreams() );
if( getStreamType() != AVMEDIA_TYPE_DATA )
{
throw std::runtime_error( "unable to get data descriptor on non-data stream" );
}
return *static_cast<DataCodec*>( _codec );
}
AVMediaType InputStream::getStreamType() const
{
return _inputFile->getFormatContext().getAVStream( _streamIndex ).codec->codec_type;
}
float InputStream::getDuration() const
{
return _inputFile->getProperties().getStreamPropertiesWithIndex( _streamIndex ).getDuration();
}
void InputStream::addPacket( AVPacket& packet )
{
// Do not cache data if the stream is declared as unused in process
if( ! _isActivated )
return;
_streamCache.push( CodedData() );
_streamCache.back().copyData( packet.data, packet.size );
}
void InputStream::clearBuffering()
{
_streamCache = std::queue<CodedData>();
}
}