Manager of filters. More...

#include <FilterGraph.hpp>

Public Member Functions
	FilterGraph (const ICodec &codec)

	~FilterGraph ()

Filter &	addFilter (const std::string &filterName, const std::string &filterOptions="", const std::string &instanceName="")
	Add a filter. More...

void	process (Frame &frame)
	Pull filtered data from the filter graph, and put result to the given frame. More...

Private Member Functions
	FilterGraph (const FilterGraph &otherFilterGraph)

FilterGraph &	operator= (const FilterGraph &otherFilterGraph)

bool	hasFilters () const

void	init (const Frame &frame)
	Initialize the graph of filters to process. More...

void	pushFilter (Filter &filter)
	Push the given Filter to the graph. More...


void	pushInBuffer (const Frame &frame)
	Push the input and output buffer at the beginning and the end of the graph. More...

void	pushOutBuffer (const Frame &frame)

Private Attributes
AVFilterGraph *	_graph
	The graph which holds the filters. More...

std::vector< Filter * >	_filters
	List of filters to process. More...

const ICodec &	_codec
	Codec of the stream on which the filters will be applied. More...

bool	_isInit
	Is the FilterGraph initialized. More...

Detailed Description

Manager of filters.

Warning: Currently, the class manages only filters which has one input and one output.

Note: See 'complex graph' definition in ffmpeg documentation.

Definition at line 21 of file FilterGraph.hpp.

Constructor & Destructor Documentation

avtranscoder::FilterGraph::FilterGraph ( const FilterGraph & otherFilterGraph )

private

avtranscoder::FilterGraph::FilterGraph ( const ICodec & codec )

Definition at line 19 of file FilterGraph.cpp.

References _graph.

avtranscoder::FilterGraph::~FilterGraph ( )

Definition at line 29 of file FilterGraph.cpp.

References _filters, and _graph.

Member Function Documentation

Filter & avtranscoder::FilterGraph::addFilter	(	const std::string &	filterName,
		const std::string &	filterOptions = `""`,
		const std::string &	instanceName = `""`
	)

Add a filter.

Parameters

filterName	the method gets the filter definition from this name.
filterArgs	options to initialize the filter with. This must be a ':'-separated list of options in the 'key=value' form.
instanceName	name of the instance filter in the graph (if empty, same as filterName).

Returns: the filter added

Exceptions

runtime exception if the filter is not found

Warning: The filter will be added to the filter graph when calling process method.

See also: process

Definition at line 71 of file FilterGraph.cpp.

References _filters, and LOG_INFO.

Referenced by pushOutBuffer().

bool avtranscoder::FilterGraph::hasFilters ( ) const

inlineprivate

Returns: If at least one filter has been added to the filter graph

Definition at line 56 of file FilterGraph.hpp.

Referenced by process().

void avtranscoder::FilterGraph::init ( const Frame & frame )

private

Initialize the graph of filters to process.

See also: pushFilterToGraph; pushInBuffer; pushOutBuffer

Definition at line 80 of file FilterGraph.cpp.

References _filters, _graph, _isInit, avtranscoder::getDescriptionFromErrorCode(), LOG_INFO, pushFilter(), pushInBuffer(), and pushOutBuffer().

Referenced by process().

FilterGraph& avtranscoder::FilterGraph::operator= ( const FilterGraph & otherFilterGraph )

private

void avtranscoder::FilterGraph::process ( Frame & frame )

Pull filtered data from the filter graph, and put result to the given frame.

Parameters

frame both input and output data of the method.

Note: Do nothing if there was no filter added.

Definition at line 38 of file FilterGraph.cpp.

References _filters, _isInit, avtranscoder::Frame::getAVFrame(), avtranscoder::getDescriptionFromErrorCode(), hasFilters(), init(), and LOG_DEBUG.

Referenced by avtranscoder::StreamTranscoder::processTranscode().

void avtranscoder::FilterGraph::pushFilter ( Filter & filter )

private

Push the given Filter to the graph.

Definition at line 113 of file FilterGraph.cpp.

References _graph, avtranscoder::Filter::getAVFilter(), avtranscoder::getDescriptionFromErrorCode(), avtranscoder::Filter::getInstanceName(), avtranscoder::Filter::getName(), avtranscoder::Filter::getOptions(), and avtranscoder::Filter::setAVFilterContext().

Referenced by init(), pushInBuffer(), and pushOutBuffer().

void avtranscoder::FilterGraph::pushInBuffer ( const Frame & frame )

private

Push the input and output buffer at the beginning and the end of the graph.

Definition at line 131 of file FilterGraph.cpp.

References _codec, _filters, avtranscoder::ICodec::getAVCodecContext(), avtranscoder::AudioFrame::getChannelLayout(), avtranscoder::VideoFrame::getHeight(), avtranscoder::VideoFrame::getPixelFormat(), avtranscoder::getPixelFormatName(), avtranscoder::AudioFrame::getSampleFormat(), avtranscoder::getSampleFormatName(), avtranscoder::AudioFrame::getSampleRate(), avtranscoder::VideoFrame::getWidth(), avtranscoder::Frame::isAudioFrame(), avtranscoder::Frame::isVideoFrame(), LOG_INFO, and pushFilter().

Referenced by init().

void avtranscoder::FilterGraph::pushOutBuffer ( const Frame & frame )

private

Definition at line 169 of file FilterGraph.cpp.

References addFilter(), avtranscoder::Frame::isAudioFrame(), avtranscoder::Frame::isVideoFrame(), and pushFilter().

Referenced by init().

Field Documentation

const ICodec& avtranscoder::FilterGraph::_codec

private

Codec of the stream on which the filters will be applied.

Definition at line 80 of file FilterGraph.hpp.

Referenced by pushInBuffer().

std::vector<Filter*> avtranscoder::FilterGraph::_filters

private

List of filters to process.

Definition at line 79 of file FilterGraph.hpp.

Referenced by addFilter(), init(), process(), pushInBuffer(), and ~FilterGraph().

AVFilterGraph* avtranscoder::FilterGraph::_graph

private

The graph which holds the filters.

Definition at line 78 of file FilterGraph.hpp.

Referenced by FilterGraph(), init(), pushFilter(), and ~FilterGraph().

bool avtranscoder::FilterGraph::_isInit

private

Is the FilterGraph initialized.

See also: init

Definition at line 86 of file FilterGraph.hpp.

Referenced by init(), and process().

The documentation for this class was generated from the following files:

/datas/cnt/workspace/avTranscoder/src/AvTranscoder/filter/FilterGraph.hpp
/datas/cnt/workspace/avTranscoder/src/AvTranscoder/filter/FilterGraph.cpp

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Field Documentation