DecoderImpl< type > 模板类 参考

#include <forward.hpp>

类 DecoderImpl< type > 继承关系图:

Public 成员函数
	DecoderImpl (AVStream *vs, TwinsBlockQueue< AVFrame * > *queue)
PONY_THREAD_SAFE double	duration () override
	PONY_GUARD_BY (DECODER) bool accept(AVPacket *pkt
	if (ret< 0)
	while (ret >=0 &&!interrupt)
PONY_THREAD_SAFE VideoFrameRef	getPicture () override
PONY_THREAD_SAFE AudioFrame	getSample () override
PonyAudioFormat	getInputFormat () override
void	setOutputFormat (const PonyAudioFormat &format) override
PONY_THREAD_SAFE qreal	viewFront () override
PONY_THREAD_SAFE int	skip (const std::function< bool(qreal)> &predicate) override
PONY_THREAD_SAFE void	setEnable (bool b) override
	PONY_GUARD_BY (DECODER) void flushFFmpegBuffers() override
Public 成员函数 继承自 DecoderContext
	DecoderContext (AVStream *vs)
	~DecoderContext ()
Public 成员函数 继承自 IDemuxDecoder
virtual bool	accept (AVPacket *pkt, std::atomic< bool > &interrupt)=0
virtual void	flushFFmpegBuffers ()=0
virtual	~IDemuxDecoder ()=default
virtual void	setFollower (IDemuxDecoder *follower)
virtual void	pushFrameStack ()
virtual qreal	getLastPts ()
virtual void	clearFrameStack ()
virtual void	setStart (qreal secs)
virtual qreal	nextSegment ()

Public 属性
std::atomic< bool > &interrupt	override
int	ret = avcodec_send_packet(codecCtx, pkt)
return	false
Public 属性 继承自 DecoderContext
AVCodec *	codec = nullptr
AVStream *	stream = nullptr
AVCodecContext *	codecCtx = nullptr
AVFrame *	frameBuf = nullptr

Protected 属性
TwinsBlockQueue< AVFrame * > *	frameQueue

额外继承的成员函数
Public 类型 继承自 IDemuxDecoder
enum class	DecoderType { Audio , Video , Common }

构造及析构函数说明

DecoderImpl()

template<IDemuxDecoder::DecoderType type>

DecoderImpl< type >::DecoderImpl ( AVStream *  vs, TwinsBlockQueue< AVFrame * > *  queue  )

inline

成员函数说明

duration()

template<IDemuxDecoder::DecoderType type>

PONY_THREAD_SAFE double DecoderImpl< type >::duration ( )

inlineoverridevirtual

获取流的长度

返回

实现了 IDemuxDecoder.

getInputFormat()

template<IDemuxDecoder::DecoderType type>

PonyAudioFormat DecoderImpl< type >::getInputFormat ( )

inlineoverridevirtual

实现了 IDemuxDecoder.

getPicture()

template<IDemuxDecoder::DecoderType type>

PONY_THREAD_SAFE VideoFrameRef DecoderImpl< type >::getPicture ( )

inlineoverridevirtual

获取视频帧并从队列中删除, 仅当当前解码器是视频解码器时有效

参数

b

是否阻塞

返回

视频帧, 请用 isValid 判断是否有效

实现了 IDemuxDecoder.

getSample()

template<IDemuxDecoder::DecoderType type>

PONY_THREAD_SAFE AudioFrame DecoderImpl< type >::getSample ( )

inlineoverridevirtual

获取音频帧并从队列中删除, 仅当当前解码器是音频解码器时有效

参数

b

是否阻塞

返回

音频帧, 请用 isValid 判断是否有效

实现了 IDemuxDecoder.

if()

template<IDemuxDecoder::DecoderType type>

DecoderImpl< type >::if ( )

inline

PONY_GUARD_BY() [1/2]

template<IDemuxDecoder::DecoderType type>

DecoderImpl< type >::PONY_GUARD_BY

(

DECODER

)

PONY_GUARD_BY() [2/2]

template<IDemuxDecoder::DecoderType type>

DecoderImpl< type >::PONY_GUARD_BY ( DECODER  )

inlineoverride

setEnable()

template<IDemuxDecoder::DecoderType type>

PONY_THREAD_SAFE void DecoderImpl< type >::setEnable ( bool  b )

inlineoverridevirtual

实现了 IDemuxDecoder.

setOutputFormat()

template<IDemuxDecoder::DecoderType type>

void DecoderImpl< type >::setOutputFormat ( const PonyAudioFormat &  format )

inlineoverridevirtual

实现了 IDemuxDecoder.

skip()

template<IDemuxDecoder::DecoderType type>

PONY_THREAD_SAFE int DecoderImpl< type >::skip ( const std::function< bool(qreal)> &  predicate )

inlineoverridevirtual

线性扫描移除满足条件的帧, 当发现帧不满足条件时, 结束扫描

参数

predicate

条件

返回

移除帧的个数

实现了 IDemuxDecoder.

viewFront()

template<IDemuxDecoder::DecoderType type>

PONY_THREAD_SAFE qreal DecoderImpl< type >::viewFront ( )

inlineoverridevirtual

获取队首帧的PTS, 若不存在, 返回NaN

返回

队首帧的PTS

实现了 IDemuxDecoder.

while()

template<IDemuxDecoder::DecoderType type>

DecoderImpl< type >::while ( ret >=0 &&!  interrupt )

inline

类成员变量说明

false

template<IDemuxDecoder::DecoderType type>

return DecoderImpl< type >::false

frameQueue

template<IDemuxDecoder::DecoderType type>

TwinsBlockQueue<AVFrame *>* DecoderImpl< type >::frameQueue

protected

override

template<IDemuxDecoder::DecoderType type>

std::atomic<bool>& interrupt DecoderImpl< type >::override

初始值:

{
        if (!frameQueue->isEnable())
            return true

ret

template<IDemuxDecoder::DecoderType type>

int DecoderImpl< type >::ret = avcodec_send_packet(codecCtx, pkt)

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该类的文档由以下文件生成:

• src/decoder/private/forward.hpp