Sirikata::SDL::FFmpegAudioStream Class Reference

Represents a single audio stream within a media file. More...

#include <FFmpegAudioStream.hpp>

Collaboration diagram for Sirikata::SDL::FFmpegAudioStream:

List of all members.

Public Member Functions
	~FFmpegAudioStream ()
bool	finished () const
void	samples (int16 *samples_out, bool loop)
	Get the next samples from the stream, or fill them with silence if the stream has ended.
Private Member Functions
	FFmpegAudioStream (FFmpegStreamPtr parent, uint32 stream_idx, uint8 target_nchannels)
bool	openCodec ()
void	closeCodec ()
AVPacket *	getNextPacket (bool loop)
void	decodeSome (bool loop)
void	convertFormat (int decoded_size)
Private Attributes
FFmpegStreamPtr	mParent
AVCodecContext *	mCodecCtx
AVCodec *	mCodec
uint32	mStreamIndex
bool	mFinished
AVPacket *	mCurrentPacket
int	mCurrentPacketOffset
uint8 *	mDecodedData
SDL_AudioCVT *	mConverter
uint8	mTargetChannels
uint16 *	mConvertedData
int	mConvertedOffset
int	mConvertedSize
Friends
class	FFmpegStream

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Detailed Description

Represents a single audio stream within a media file.

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Constructor & Destructor Documentation

Sirikata::SDL::FFmpegAudioStream::~FFmpegAudioStream

(

)

References closeCodec(), mConvertedData, mConverter, and mDecodedData.

Sirikata::SDL::FFmpegAudioStream::FFmpegAudioStream	(	FFmpegStreamPtr	parent,
		uint32	stream_idx,
		uint8	target_nchannels
	)		[private]

References openCodec().

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Member Function Documentation

void Sirikata::SDL::FFmpegAudioStream::closeCodec

(

)

[private]

References mCodecCtx.

Referenced by getNextPacket(), and ~FFmpegAudioStream().

void Sirikata::SDL::FFmpegAudioStream::convertFormat

(

int

decoded_size

)

[private]

References AUDIO_LOG, DECODE_BUFFER_SIZE, Sirikata::Logging::error, mCodecCtx, mConvertedData, mConvertedOffset, mConvertedSize, mConverter, mDecodedData, and mTargetChannels.

Referenced by decodeSome().

void Sirikata::SDL::FFmpegAudioStream::decodeSome

(

bool

loop

)

[private]

References AUDIO_LOG, convertFormat(), DECODE_BUFFER_SIZE, getNextPacket(), Sirikata::Logging::insane, mCodecCtx, mConvertedOffset, mConvertedSize, mCurrentPacket, mCurrentPacketOffset, and mDecodedData.

Referenced by samples().

bool Sirikata::SDL::FFmpegAudioStream::finished

(

)

const

References mFinished.

Referenced by samples().

AVPacket * Sirikata::SDL::FFmpegAudioStream::getNextPacket

(

bool

loop

)

[private]

References AUDIO_LOG, closeCodec(), Sirikata::Logging::insane, mFinished, mParent, mStreamIndex, and openCodec().

Referenced by decodeSome().

bool Sirikata::SDL::FFmpegAudioStream::openCodec

(

)

[private]

References AUDIO_LOG, Sirikata::Logging::error, mCodec, mCodecCtx, mParent, and mStreamIndex.

Referenced by FFmpegAudioStream(), and getNextPacket().

void Sirikata::SDL::FFmpegAudioStream::samples	(	int16 *	samples_out,
		bool	loop
	)

Get the next samples from the stream, or fill them with silence if the stream has ended.

If the requested number of channels doesn't match, the conversion will be performed automatically.

Parameters:

samples_out	output buffer for decoded samples. Always uses 16-bit signed values
loop	if true, loops the track if the end is reached while decoding the requested samples

References decodeSome(), finished(), mConvertedData, mConvertedOffset, mConvertedSize, and mTargetChannels.

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Friends And Related Function Documentation

friend class FFmpegStream [friend]

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Member Data Documentation

AVCodec* Sirikata::SDL::FFmpegAudioStream::mCodec [private]

Referenced by openCodec().

AVCodecContext* Sirikata::SDL::FFmpegAudioStream::mCodecCtx [private]

Referenced by closeCodec(), convertFormat(), decodeSome(), and openCodec().

uint16* Sirikata::SDL::FFmpegAudioStream::mConvertedData [private]

Referenced by convertFormat(), samples(), and ~FFmpegAudioStream().

int Sirikata::SDL::FFmpegAudioStream::mConvertedOffset [private]

Referenced by convertFormat(), decodeSome(), and samples().

int Sirikata::SDL::FFmpegAudioStream::mConvertedSize [private]

Referenced by convertFormat(), decodeSome(), and samples().

SDL_AudioCVT* Sirikata::SDL::FFmpegAudioStream::mConverter [private]

Referenced by convertFormat(), and ~FFmpegAudioStream().

AVPacket* Sirikata::SDL::FFmpegAudioStream::mCurrentPacket [private]

Referenced by decodeSome().

int Sirikata::SDL::FFmpegAudioStream::mCurrentPacketOffset [private]

Referenced by decodeSome().

uint8* Sirikata::SDL::FFmpegAudioStream::mDecodedData [private]

Referenced by convertFormat(), decodeSome(), and ~FFmpegAudioStream().

bool Sirikata::SDL::FFmpegAudioStream::mFinished [private]

Referenced by finished(), and getNextPacket().

FFmpegStreamPtr Sirikata::SDL::FFmpegAudioStream::mParent [private]

Referenced by getNextPacket(), and openCodec().

uint32 Sirikata::SDL::FFmpegAudioStream::mStreamIndex [private]

Referenced by getNextPacket(), and openCodec().

uint8 Sirikata::SDL::FFmpegAudioStream::mTargetChannels [private]

Referenced by convertFormat(), and samples().

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

• liboh/plugins/sdlaudio/FFmpegAudioStream.hpp
• liboh/plugins/sdlaudio/FFmpegAudioStream.cpp