A handler for V4L2 Memory2Memory codecs. More...

#include <libmythtv/decoders/mythv4l2m2mcontext.h>

Inheritance diagram for MythV4L2M2MContext:

Collaboration diagram for MythV4L2M2MContext:

Public Member Functions
	MythV4L2M2MContext (DecoderBase *Parent, MythCodecID CodecID)

	~MythV4L2M2MContext () override=default

void	InitVideoCodec (AVCodecContext *Context, bool SelectedStream, bool &DirectRendering) override

bool	RetrieveFrame (AVCodecContext Context, MythVideoFrame Frame, AVFrame *AvFrame) override

void	SetDecoderOptions (AVCodecContext Context, const AVCodec Codec) override
	Reduce the number of capture buffers. More...

int	HwDecoderInit (AVCodecContext *Context) override

bool	DecoderWillResetOnFlush () override

Public Member Functions inherited from MythDRMPRIMEContext
	MythDRMPRIMEContext (DecoderBase *Parent, MythCodecID CodecID)

	~MythDRMPRIMEContext () override

int	HwDecoderInit (AVCodecContext *Context) override

void	InitVideoCodec (AVCodecContext *Context, bool SelectedStream, bool &DirectRendering) override

bool	RetrieveFrame (AVCodecContext Context, MythVideoFrame Frame, AVFrame *AvFrame) override

bool	DecoderWillResetOnFlush (void) override

bool	GetDRMBuffer (AVCodecContext Context, MythVideoFrame Frame, AVFrame *AvFrame, int)

Public Member Functions inherited from MythCodecContext
	MythCodecContext (DecoderBase *Parent, MythCodecID CodecID)

virtual	~MythCodecContext ()=default

virtual void	InitVideoCodec (AVCodecContext *Context, bool SelectedStream, bool &DirectRendering)

virtual int	HwDecoderInit (AVCodecContext *)

virtual bool	RetrieveFrame (AVCodecContext , MythVideoFrame , AVFrame *)

virtual int	FilteredReceiveFrame (AVCodecContext Context, AVFrame Frame)
	Retrieve and process/filter AVFrame. More...

virtual void	SetDeinterlacing (AVCodecContext , MythVideoProfile , bool)

virtual void	PostProcessFrame (AVCodecContext , MythVideoFrame )

virtual bool	IsDeinterlacing (bool &, bool=false)

virtual void	SetDecoderOptions (AVCodecContext , const AVCodec )

virtual bool	DecoderWillResetOnFlush (void)

virtual bool	DecoderWillResetOnAspect (void)

virtual bool	DecoderNeedsReset (AVCodecContext *)

Static Public Member Functions
static MythCodecID	GetSupportedCodec (AVCodecContext Context, const AVCodec Codec, const QString &Decoder, AVStream *Stream, uint StreamType)

static bool	GetBuffer (AVCodecContext Context, MythVideoFrame Frame, AVFrame *AvFrame, int)
	Retrieve a frame from CPU memory. More...

static bool	HaveV4L2Codecs (bool Reinit=false)

static void	GetDecoderList (QStringList &Decoders)

static enum AVPixelFormat	GetV4L2RequestFormat (AVCodecContext Context, const AVPixelFormat PixFmt)

static int	InitialiseV4L2RequestContext (AVCodecContext *Context)

Static Public Member Functions inherited from MythDRMPRIMEContext
static MythCodecID	GetSupportedCodec (AVCodecContext Context, const AVCodec Codec, const QString &Decoder, AVStream *Stream, uint StreamType)

static bool	HavePrimeDecoders (bool Reinit=false, AVCodecID Codec=AV_CODEC_ID_NONE)

static enum AVPixelFormat	GetFormat (AVCodecContext Context, const AVPixelFormat PixFmt)

Static Public Member Functions inherited from MythCodecContext
static MythCodecContext *	CreateContext (DecoderBase *Parent, MythCodecID Codec)

static void	GetDecoders (RenderOptions &Opts, bool Reinit=false)

static QStringList	GetDecoderDescription (void)

static MythCodecID	FindDecoder (const QString &Decoder, AVStream Stream, AVCodecContext Context, const AVCodec *Codec)

static int	GetBuffer (struct AVCodecContext Context, AVFrame Frame, int Flags)
	A generic hardware buffer initialisation method when using AVHWFramesContext. More...

static bool	GetBuffer2 (struct AVCodecContext Context, MythVideoFrame Frame, AVFrame *AvFrame, int Flags)
	A generic hardware buffer initialisation method when AVHWFramesContext is NOT used. More...

static int	InitialiseDecoder (AVCodecContext *Context, CreateHWDecoder Callback, const QString &Debug)
	Initialise a hardware decoder that is expected to use AVHWFramesContext. More...

static int	InitialiseDecoder2 (AVCodecContext *Context, CreateHWDecoder Callback, const QString &Debug)
	Initialise a hardware decoder that is NOT expected to use AVHWFramesContext. More...

static void	ReleaseBuffer (void Opaque, uint8_t Data)

static void	FramesContextFinished (AVHWFramesContext *Context)

static void	DeviceContextFinished (AVHWDeviceContext *Context)

static void	CreateDecoderCallback (void Wait, void Context, void *Callback)

static MythPlayerUI *	GetPlayerUI (AVCodecContext *Context)

static bool	FrameTypeIsSupported (AVCodecContext *Context, VideoFrameType Format)

static AVBufferRef *	CreateDevice (AVHWDeviceType Type, MythInteropGPU *Interop, const QString &Device=QString())

static bool	IsUnsupportedProfile (AVCodecContext *Context)
	Most hardware decoders do not support these codecs/profiles. More...

static QString	GetProfileDescription (CodecProfile Profile, QSize Size, VideoFrameType Format=FMT_NONE, uint ColorDepth=0)

static CodecProfile	FFmpegToMythProfile (AVCodecID CodecID, int Profile)

Static Protected Member Functions
static const V4L2Profiles &	GetStandardProfiles ()

static const V4L2Profiles &	GetRequestProfiles ()

Static Protected Member Functions inherited from MythDRMPRIMEContext
static MythCodecID	GetPrimeCodec (AVCodecContext Context, const AVCodec Codec, AVStream *Stream, MythCodecID Successs, MythCodecID Failure, const QString &CodecName, AVPixelFormat Format)

Static Protected Member Functions inherited from MythCodecContext
static void	DestroyInterop (MythInteropGPU *Interop)

static void	NewHardwareFramesContext (void)
	Track the number of concurrent frames contexts. More...

Static Private Member Functions
static V4L2Profiles	GetProfiles (const std::vector< V4L2Mapping > &Profiles)

Private Attributes
bool	m_request { false }

Additional Inherited Members
Public Types inherited from MythCodecContext
enum	CodecProfile : std::uint8_t { NoProfile = 0 , MPEG1 , MPEG2 , MPEG2Simple , MPEG2Main , MPEG2422 , MPEG2High , MPEG2Spatial , MPEG2SNR , MPEG4 , MPEG4Simple , MPEG4SimpleScaleable , MPEG4Core , MPEG4Main , MPEG4NBit , MPEG4ScaleableTexture , MPEG4SimpleFace , MPEG4BasicAnimated , MPEG4Hybrid , MPEG4AdvancedRT , MPEG4CoreScaleable , MPEG4AdvancedCoding , MPEG4AdvancedCore , MPEG4AdvancedScaleableTexture , MPEG4SimpleStudio , MPEG4AdvancedSimple , H263 , H264 , H264Baseline , H264ConstrainedBaseline , H264Main , H264MainExtended , H264High , H264High10 , H264Extended , H264High422 , H264High444 , H264ConstrainedHigh , HEVC , HEVCMain , HEVCMain10 , HEVCMainStill , HEVCRext , HEVCMain10HDR , HEVCMain10HDRPlus , VC1 , VC1Simple , VC1Main , VC1Complex , VC1Advanced , VP8 , VP9 , VP9_0 , VP9_1 , VP9_2 , VP9_3 , VP9_2HDR , VP9_2HDRPlus , VP9_3HDR , VP9_3HDRPlus , AV1 , AV1Main , AV1High , AV1Professional , MJPEG }

Protected Member Functions inherited from MythCodecContext
virtual bool	RetrieveHWFrame (MythVideoFrame Frame, AVFrame AvFrame)

Protected Attributes inherited from MythDRMPRIMEContext
MythOpenGLInterop *	m_interop { nullptr }

Protected Attributes inherited from MythCodecContext
DecoderBase *	m_parent { nullptr }

MythCodecID	m_codecID { kCodec_NONE }

bool	m_resetRequired { false }

Static Protected Attributes inherited from MythDRMPRIMEContext
static QRecursiveMutex	s_drmPrimeLock

static QStringList	s_drmPrimeDecoders

Static Protected Attributes inherited from MythCodecContext
static QAtomicInt	s_hwFramesContextCount

Detailed Description

A handler for V4L2 Memory2Memory codecs.

The bulk of the 'direct rendering' support is in MythDRMPRIMEContext. This sub-class handles v4l2 specific functionality checks and support for software frame formats.

Definition at line 10 of file mythv4l2m2mcontext.h.

Constructor & Destructor Documentation

◆ MythV4L2M2MContext()

MythV4L2M2MContext::MythV4L2M2MContext	(	DecoderBase *	Parent,
		MythCodecID	CodecID
	)

Definition at line 41 of file mythv4l2m2mcontext.cpp.

◆ ~MythV4L2M2MContext()

MythV4L2M2MContext::~MythV4L2M2MContext ( )

overridedefault

Member Function Documentation

◆ DecoderWillResetOnFlush()

bool MythV4L2M2MContext::DecoderWillResetOnFlush ( void )

overridevirtual

Reimplemented from MythDRMPRIMEContext.

Definition at line 46 of file mythv4l2m2mcontext.cpp.

◆ GetBuffer()

bool MythV4L2M2MContext::GetBuffer	(	AVCodecContext *	Context,
		MythVideoFrame *	Frame,
		AVFrame *	AvFrame,
		int
	)

static

Retrieve a frame from CPU memory.

This is similar to the default, direct render supporting, get_av_buffer in AvFormatDecoder but we copy the data from the AVFrame rather than providing our own buffer (the codec does not support direct rendering).

Definition at line 211 of file mythv4l2m2mcontext.cpp.

Referenced by RetrieveFrame().

◆ GetDecoderList()

void MythV4L2M2MContext::GetDecoderList ( QStringList & Decoders )

static

Definition at line 391 of file mythv4l2m2mcontext.cpp.

Referenced by MythCodecContext::GetDecoderDescription().

◆ GetProfiles()

V4L2Profiles MythV4L2M2MContext::GetProfiles ( const std::vector< V4L2Mapping > & Profiles )

staticprivate

Definition at line 286 of file mythv4l2m2mcontext.cpp.

Referenced by GetRequestProfiles(), and GetStandardProfiles().

◆ GetRequestProfiles()

const V4L2Profiles & MythV4L2M2MContext::GetRequestProfiles ( )

staticprotected

Definition at line 462 of file mythv4l2m2mcontext.cpp.

Referenced by GetDecoderList(), GetSupportedCodec(), HaveV4L2Codecs(), and InitVideoCodec().

◆ GetStandardProfiles()

const V4L2Profiles & MythV4L2M2MContext::GetStandardProfiles ( )

staticprotected

Definition at line 260 of file mythv4l2m2mcontext.cpp.

Referenced by GetDecoderList(), GetSupportedCodec(), and HaveV4L2Codecs().

◆ GetSupportedCodec()

MythCodecID MythV4L2M2MContext::GetSupportedCodec	(	AVCodecContext **	Context,
		const AVCodec **	Codec,
		const QString &	Decoder,
		AVStream *	Stream,
		uint	StreamType
	)

static

Definition at line 51 of file mythv4l2m2mcontext.cpp.

Referenced by MythCodecContext::FindDecoder().

◆ GetV4L2RequestFormat()

AVPixelFormat MythV4L2M2MContext::GetV4L2RequestFormat	(	AVCodecContext *	Context,
		const AVPixelFormat *	PixFmt
	)

static

Definition at line 484 of file mythv4l2m2mcontext.cpp.

Referenced by InitVideoCodec().

◆ HaveV4L2Codecs()

bool MythV4L2M2MContext::HaveV4L2Codecs ( bool Reinit = false )

static

Definition at line 413 of file mythv4l2m2mcontext.cpp.

Referenced by MythCodecContext::GetDecoders().

◆ HwDecoderInit()

int MythV4L2M2MContext::HwDecoderInit ( AVCodecContext * Context )

overridevirtual

Reimplemented from MythDRMPRIMEContext.

Definition at line 125 of file mythv4l2m2mcontext.cpp.

◆ InitialiseV4L2RequestContext()

int MythV4L2M2MContext::InitialiseV4L2RequestContext ( AVCodecContext * Context )

static

Definition at line 501 of file mythv4l2m2mcontext.cpp.

Referenced by GetV4L2RequestFormat().

◆ InitVideoCodec()

void MythV4L2M2MContext::InitVideoCodec	(	AVCodecContext *	Context,
		bool	SelectedStream,
		bool &	DirectRendering
	)

overridevirtual

Reimplemented from MythDRMPRIMEContext.

Definition at line 136 of file mythv4l2m2mcontext.cpp.

◆ RetrieveFrame()

bool MythV4L2M2MContext::RetrieveFrame	(	AVCodecContext *	Context,
		MythVideoFrame *	Frame,
		AVFrame *	AvFrame
	)

overridevirtual

Reimplemented from MythDRMPRIMEContext.

Definition at line 171 of file mythv4l2m2mcontext.cpp.

◆ SetDecoderOptions()

void MythV4L2M2MContext::SetDecoderOptions	(	AVCodecContext *	Context,
		const AVCodec *	Codec
	)

overridevirtual

Reduce the number of capture buffers.

Testing on Pi 3, the default of 20 is too high and leads to memory allocation failures in the the kernel driver.

Reimplemented from MythCodecContext.

Definition at line 187 of file mythv4l2m2mcontext.cpp.

Member Data Documentation

◆ m_request

bool MythV4L2M2MContext::m_request { false }

private

Definition at line 39 of file mythv4l2m2mcontext.h.

Referenced by InitVideoCodec(), RetrieveFrame(), and SetDecoderOptions().

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

mythtv/libs/libmythtv/decoders/mythv4l2m2mcontext.h
mythtv/libs/libmythtv/decoders/mythv4l2m2mcontext.cpp

Public Member Functions

Static Public Member Functions

Static Protected Member Functions

Static Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ MythV4L2M2MContext()

◆ ~MythV4L2M2MContext()

Member Function Documentation

◆ DecoderWillResetOnFlush()

◆ GetBuffer()

◆ GetDecoderList()

◆ GetProfiles()

◆ GetRequestProfiles()

◆ GetStandardProfiles()

◆ GetSupportedCodec()

◆ GetV4L2RequestFormat()

◆ HaveV4L2Codecs()

◆ HwDecoderInit()

◆ InitialiseV4L2RequestContext()

◆ InitVideoCodec()

◆ RetrieveFrame()

◆ SetDecoderOptions()

Member Data Documentation

◆ m_request