Audio::LibavMediaReader Class Reference

Base class for reading media streams via ffmpeg. More...

#include <ffmpegplayer.h>

Inheritance diagram for Audio::LibavMediaReader:

Classes
struct	CodecDeleter

Public Member Functions
	LibavMediaReader (const std::string &media_url, int timeout=15)
	Base abstract class for reading a media file or URL using ffmpeg. More...
virtual	~LibavMediaReader (void)

Protected Member Functions
int	initializeStream (std::unique_ptr< AVCodecContext, CodecDeleter > &codec_context)
	Prepare a ffmpeg source for playing its audio stream. More...
void	processReplayGain (AVReplayGain *gain, int size)
	Process a replaygain packet by extracting the track gain, or if not found then then the album gain. More...
virtual void	setGain (float gain)=0

Protected Attributes
const std::string	url
	Media URL or filename. More...
bool	is_network = false
	True if media is network streaming. More...
AVFormatContext *	transport = nullptr

Detailed Description

Base class for reading media streams via ffmpeg.

Constructor & Destructor Documentation

LibavMediaReader()

Audio::LibavMediaReader::LibavMediaReader	(	const std::string &	media_url,
		int	timeout = 15
	)

Base abstract class for reading a media file or URL using ffmpeg.

Parameters

media_url	The filename or URL of the media.
timeout	The timeout for reading the media stream, in seconds.

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~LibavMediaReader()

Audio::LibavMediaReader::~LibavMediaReader ( void  )

virtual

Member Function Documentation

initializeStream()

int Audio::LibavMediaReader::initializeStream ( std::unique_ptr< AVCodecContext, CodecDeleter > &  codec_context )

protected

Prepare a ffmpeg source for playing its audio stream.

Chooses codec, extracts replay gain if available, and sets streams other than the audio are set to ignore.

Parameters

codec_context

On return, is set to an initialized codec_context with appropriate codec selected for the media.

Returns

The audio stream index.

Exceptions

LavAudioException

if something goes wrong.

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processReplayGain()

void Audio::LibavMediaReader::processReplayGain ( AVReplayGain *  gain, int  size  )

protected

Process a replaygain packet by extracting the track gain, or if not found then then the album gain.

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setGain()

virtual void Audio::LibavMediaReader::setGain ( float  gain )

protectedpure virtual

Implemented in Media::LavMetadataReader, and Audio::LavPlayer.

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Member Data Documentation

is_network

bool Audio::LibavMediaReader::is_network = false

protected

True if media is network streaming.

transport

AVFormatContext* Audio::LibavMediaReader::transport = nullptr

protected

url

const std::string Audio::LibavMediaReader::url

protected

Media URL or filename.

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

• mediaunits/audio/ffmpegplayer.h
• mediaunits/audio/ffmpegplayer.cpp