A decoder for media files. More...

#include <avformatdecoder.h>

Inheritance diagram for AvFormatDecoder:

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Collaboration diagram for AvFormatDecoder:

[legend]

Public Member Functions
	AvFormatDecoder (MythPlayer *parent, const ProgramInfo &pginfo, PlayerFlags flags)

	~AvFormatDecoder () override

	AvFormatDecoder (const AvFormatDecoder &)=delete

AvFormatDecoder &	operator= (const AvFormatDecoder &)=delete

void	SetEof (bool eof) override

MythCodecMap *	CodecMap (void)

void	CloseCodecs ()

void	CloseContext ()

void	Reset (bool reset_video_data, bool seek_reset, bool reset_file) override

int	OpenFile (MythMediaBuffer *Buffer, bool novideo, TestBufferVec &testbuf) override
	Open our file and set up or audio and video parameters. More...

bool	GetFrame (DecodeType Type, bool &Retry) override
	Demux, preprocess and possibly decode a frame of video/audio. More...

bool	IsLastFrameKey (void) const override

void	WriteStoredData (MythMediaBuffer *Buffer, bool storevid, std::chrono::milliseconds timecodeOffset) override
	This is a No-op for this class. More...

void	SetRawAudioState (bool state) override
	This is a No-op for this class. More...

bool	GetRawAudioState (void) const override
	This is a No-op for this class. More...

void	SetRawVideoState (bool state) override
	This is a No-op for this class. More...

bool	GetRawVideoState (void) const override
	This is a No-op for this class. More...

long	UpdateStoredFrameNum (long frame) override
	This is a No-op for this class. More...

QString	GetCodecDecoderName (void) const override

QString	GetRawEncodingType (void) override

MythCodecID	GetVideoCodecID (void) const override

void	SetDisablePassThrough (bool disable) override
	Disables AC3/DTS pass through. More...

void	ForceSetupAudioStream (void) override

void	AddTextData (unsigned char *buf, int len, int64_t timecode, char type)

QString	GetTrackDesc (uint Type, uint TrackNo) override

int	SetTrack (uint Type, int TrackNo) override

int	ScanStreams (bool novideo)

int	FindStreamInfo (void)

int	GetNumChapters () override

void	GetChapterTimes (QList< std::chrono::seconds > &times) override

int	GetCurrentChapter (long long framesPlayed) override

long long	GetChapter (int chapter) override

bool	DoRewind (long long desiredFrame, bool discardFrames=true) override

bool	DoFastForward (long long desiredFrame, bool discardFrames=true) override
	Skips ahead or rewinds to desiredFrame. More...

void	SetIdrOnlyKeyframes (bool value) override

std::chrono::milliseconds	NormalizeVideoTimecode (std::chrono::milliseconds timecode) override

virtual std::chrono::milliseconds	NormalizeVideoTimecode (AVStream *st, std::chrono::milliseconds timecode)

int	GetTeletextDecoderType (void) const override

QString	GetXDS (const QString &Key) const override

QByteArray	GetSubHeader (uint TrackNo) override

void	GetAttachmentData (uint TrackNo, QByteArray &Filename, QByteArray &Data) override

bool	SetAudioByComponentTag (int Tag) override

bool	SetVideoByComponentTag (int Tag) override

virtual int	GetTeletextLanguage (uint Index)
	Returns TeleText language. More...

virtual int	GetSubtitleLanguage (uint, uint StreamIndex)
	Returns DVD Subtitle language. More...

virtual int	GetCaptionLanguage (TrackType TrackType, int ServiceNum)
	Return ATSC Closed Caption Language. More...

virtual int	GetAudioLanguage (uint AudioIndex, uint StreamIndex)

virtual AudioTrackType	GetAudioTrackType (uint StreamIndex)

Public Member Functions inherited from DecoderBase
	DecoderBase (MythPlayer *parent, const ProgramInfo &pginfo)

virtual	~DecoderBase ()

void	SetRenderFormats (const VideoFrameTypes *RenderFormats)

virtual void	SetEofState (EofState eof)

EofState	GetEof (void)

void	SetSeekSnap (uint64_t snap)

uint64_t	GetSeekSnap (void) const

void	SetLiveTVMode (bool live)

void	SetProgramInfo (const ProgramInfo &pginfo)

virtual void	SetWatchingRecording (bool mode)

MythPlayer *	GetPlayer ()

std::chrono::milliseconds	TranslatePositionFrameToMs (long long position, float fallback_framerate, const frm_dir_map_t &cutlist)

uint64_t	TranslatePositionMsToFrame (std::chrono::milliseconds dur_ms, float fallback_framerate, const frm_dir_map_t &cutlist)

float	GetVideoAspect (void) const

virtual void	ClearStoredData (void)

virtual double	GetFPS (void) const

uint	GetRawBitrate (void) const
	Returns the estimated bitrate if the video were played at normal speed. More...

long long	GetFramesRead (void) const

long long	GetFramesPlayed (void) const

void	SetFramesPlayed (long long newValue)

virtual void	ResetPosMap (void)

virtual bool	SyncPositionMap (void)
	Updates the position map used for skipping frames. More...

virtual bool	PosMapFromDb (void)

virtual bool	PosMapFromEnc (void)
	Queries encoder for position map data that has not been committed to the DB yet. More...

virtual bool	FindPosition (long long desired_value, bool search_adjusted, int &lower_bound, int &upper_bound)

uint64_t	SavePositionMapDelta (long long first_frame, long long last_frame)

void	SetTranscoding (bool value)

bool	IsErrored () const

bool	HasPositionMap (void) const

void	SetWaitForChange (void)

bool	GetWaitForChange (void) const

void	SetReadAdjust (long long adjust)

void	SetDecodeAllSubtitles (bool DecodeAll)

virtual QStringList	GetTracks (uint Type)

virtual uint	GetTrackCount (uint Type)

virtual int	GetTrackLanguageIndex (uint Type, uint TrackNo)

int	GetTrack (uint Type)

StreamInfo	GetTrackInfo (uint Type, uint TrackNo)

int	ChangeTrack (uint Type, int Dir)

virtual bool	InsertTrack (uint Type, const StreamInfo &Info)

int	NextTrack (uint Type)

void	SaveTotalDuration (void)

void	ResetTotalDuration (void)

void	SaveTotalFrames (void)

void	TrackTotalDuration (bool track)

int	GetfpsMultiplier (void) const

MythCodecContext *	GetMythCodecContext (void)

Static Public Member Functions
static bool	CanHandle (TestBufferVec &testbuf, const QString &filename)
	Perform an av_probe_input_format on the passed data to see if we can decode it with this class. More...

static int	GetMaxReferenceFrames (AVCodecContext *Context)

Static Public Member Functions inherited from DecoderBase
static uint64_t	TranslatePositionAbsToRel (const frm_dir_map_t &deleteMap, uint64_t absPosition, const frm_pos_map_t &map=frm_pos_map_t(), float fallback_ratio=1.0)

static uint64_t	TranslatePositionRelToAbs (const frm_dir_map_t &deleteMap, uint64_t relPosition, const frm_pos_map_t &map=frm_pos_map_t(), float fallback_ratio=1.0)

static uint64_t	TranslatePosition (const frm_pos_map_t &map, long long key, float fallback_ratio)

static AVPixelFormat	GetBestVideoFormat (AVPixelFormat Formats, const VideoFrameTypes RenderFormats)
	Find a suitable frame format that is mutually acceptable to the decoder and render device. More...

Protected Member Functions
int	AutoSelectTrack (uint type) override
	Select best track. More...

void	ScanATSCCaptionStreams (int av_index)

void	UpdateATSCCaptionTracks (void)

void	UpdateCaptionTracksFromStreams (bool check_608, bool check_708)

void	ScanTeletextCaptions (int av_index)

void	ScanRawTextCaptions (int av_stream_index)

void	ScanDSMCCStreams (void)
	Check to see whether there is a Network Boot Ifo sub-descriptor in the PMT which requires the MHEG application to reboot. More...

int	AutoSelectAudioTrack (void)
	Selects the best audio track. More...

int	filter_max_ch (const AVFormatContext *ic, const sinfo_vec_t &tracks, const std::vector< int > &fs, enum AVCodecID codecId=AV_CODEC_ID_NONE, int profile=-1)

void	DecodeDTVCC (const uint8_t *buf, uint buf_size, bool scte)

void	DecodeCCx08 (const uint8_t *buf, uint buf_size, bool scte)

void	InitByteContext (bool forceseek=false)

void	InitVideoCodec (AVStream stream, AVCodecContext enc, bool selectedStream=false)

void	MpegPreProcessPkt (AVStream stream, AVPacket pkt)
	Preprocess a packet, setting the video parms if necessary. More...

int	H264PreProcessPkt (AVStream stream, AVPacket pkt)

bool	PreProcessVideoPacket (AVStream stream, AVPacket pkt)

virtual bool	ProcessVideoPacket (AVStream stream, AVPacket pkt, bool &Retry)

virtual bool	ProcessVideoFrame (AVStream Stream, AVFrame AvFrame)

bool	ProcessAudioPacket (AVStream stream, AVPacket pkt, DecodeType decodetype)

bool	ProcessSubtitlePacket (AVStream stream, AVPacket pkt)

bool	ProcessRawTextPacket (AVPacket *Packet)

virtual bool	ProcessDataPacket (AVStream curstream, AVPacket pkt, DecodeType decodetype)

void	ProcessVBIDataPacket (const AVStream stream, const AVPacket pkt)
	Process ivtv proprietary embedded vertical blanking interval captions. More...

void	ProcessDVBDataPacket (const AVStream stream, const AVPacket pkt)
	Process DVB Teletext. More...

void	ProcessDSMCCPacket (const AVStream stream, const AVPacket pkt)
	Process DSMCC object carousel packet. More...

void	SeekReset (long long newkey, uint skipFrames, bool doFlush, bool discardFrames) override

bool	DecoderWillDownmix (const AVCodecContext *ctx)

bool	DoPassThrough (const AVCodecParameters *par, bool withProfile=true)

bool	SetupAudioStream (void)
	Reinitializes audio if it needs to be reinitialized. More...

void	SetupAudioStreamSubIndexes (int streamIndex)
	Reacts to DUAL/STEREO changes on the fly and fix streams. More...

void	RemoveAudioStreams ()
	remove audio streams from the context used by dvd code during title transitions to remove stale audio streams More...

void	HandleGopStart (AVPacket *pkt, bool can_reliably_parse_keyframes)
	Update our position map, keyframe distance, and the like. More...

bool	GenerateDummyVideoFrames (void)

bool	HasVideo (const AVFormatContext *ic)

float	GetVideoFrameRate (AVStream Stream, AVCodecContext Context, bool Sanitise=false)

bool	OpenAVCodec (AVCodecContext avctx, const AVCodec codec)

void	UpdateFramesPlayed (void) override

bool	DoRewindSeek (long long desiredFrame) override

void	DoFastForwardSeek (long long desiredFrame, bool &needflush) override
	Seeks to the keyframe just before the desiredFrame if exact seeks is enabled, or the frame just after it if exact seeks is not enabled. More...

virtual void	StreamChangeCheck (void)

virtual void	PostProcessTracks (void)

virtual bool	IsValidStream (int)

int	DecodeAudio (AVCodecContext ctx, uint8_t buffer, int &data_size, AVPacket *pkt)

virtual int	ReadPacket (AVFormatContext ctx, AVPacket pkt, bool &storePacket)

bool	FlagIsSet (PlayerFlags arg)

Protected Member Functions inherited from DecoderBase
void	AutoSelectTracks (void)

void	ResetTracks (void)

void	FileChanged (void)

long long	ConditionallyUpdatePosMap (long long desiredFrame)

long long	GetLastFrameInPosMap (void) const

unsigned long	GetPositionMapSize (void) const

long long	GetKey (const PosMapEntry &entry) const

Static Protected Member Functions
static void	av_update_stream_timings_video (AVFormatContext *ic)

Protected Attributes
bool	m_isDbIgnored

AVCParser *	m_avcParser {nullptr}

AVFormatContext *	m_ic {nullptr}

MythCodecMap	m_codecMap { }

URLContext	m_readContext {}

int	m_frameDecoded {0}

MythVideoFrame *	m_decodedVideoFrame {nullptr}

MythAVFormatBuffer *	m_avfRingBuffer {nullptr}

struct SwsContext *	m_swsCtx {nullptr}

bool	m_directRendering {false}

bool	m_noDtsHack {false}

bool	m_doRewind {false}

bool	m_gopSet {false}

bool	m_seenGop {false}
	A flag to indicate that we've seen a GOP frame. Used in junction with seq_count. More...

int	m_seqCount {0}
	A counter used to determine if we need to force a call to HandleGopStart. More...

QList< AVPacket * >	m_storedPackets

int	m_prevGopPos {0}

bool	m_gotVideoFrame {false}

bool	m_hasVideo {false}

bool	m_needDummyVideoFrames {false}

bool	m_skipAudio {false}

bool	m_allowedQuit {false}

uint32_t	m_startCodeState {0xffffffff}

std::chrono::milliseconds	m_lastVPts {0ms}

std::chrono::milliseconds	m_lastAPts {0ms}

std::chrono::microseconds	m_lastCcPtsu {0ms}

std::chrono::milliseconds	m_firstVPts {0ms}

bool	m_firstVPtsInuse {false}

int64_t	m_faultyPts {0}

int64_t	m_faultyDts {0}

int64_t	m_lastPtsForFaultDetection {0}

int64_t	m_lastDtsForFaultDetection {0}

bool	m_ptsDetected {false}

bool	m_reorderedPtsDetected {false}

bool	m_ptsSelected {true}

bool	m_useFrameTiming {false}

bool	m_forceDtsTimestamps {false}

PlayerFlags	m_playerFlags

MythCodecID	m_videoCodecId {kCodec_NONE}

int	m_maxKeyframeDist {-1}

int	m_averrorCount {0}

uint	m_ignoreScte {0}

uint	m_invertScteField {0}

uint	m_lastScteField {0}

CC608Decoder *	m_ccd608 {nullptr}

CC708Decoder *	m_ccd708 {nullptr}

TeletextDecoder *	m_ttd {nullptr}

std::array< bool, 68 >	m_ccX08InPmt {}
	Lookup table for whether a stream was seen in the PMT entries 0-3 correspond to CEA-608 CC1 through CC4, while entries 4-67 corresport to CEA-708 streams 0 through 64. More...

std::array< bool, 68 >	m_ccX08InTracks {}
	Lookup table for whether a stream is represented in the UI entries 0-3 correspond to CEA-608 CC1 through CC4, while entries 4-67 corresport to CEA-708 streams 0 through 64. More...

QList< StreamInfo >	m_pmtTracks
	StreamInfo for 608 and 708 Captions seen in the PMT descriptor. More...

QList< TrackType >	m_pmtTrackTypes
	TrackType (608 or 708) for Captions seen in the PMT descriptor. More...

QList< StreamInfo >	m_streamTracks
	StreamInfo for 608 and 708 Captions seen in the caption stream itself but not seen in the PMT. More...

QList< TrackType >	m_streamTrackTypes
	TrackType (608 or 708) for Captions seen in the caption stream itself but not seen in the PMT. More...

InteractiveTV *	m_itv {nullptr}
	MHEG/MHP decoder. More...

uint8_t *	m_audioSamples {nullptr}

bool	m_disablePassthru {false}

AudioInfo	m_audioIn

AudioInfo	m_audioOut

bool	m_processFrames {true}

bool	m_streamsChanged { false }

bool	m_resetHardwareDecoders { false }

std::chrono::milliseconds	m_audioReadAhead {100ms}

QRecursiveMutex	m_avCodecLock

Protected Attributes inherited from DecoderBase
MythPlayer *	m_parent {nullptr}

ProgramInfo *	m_playbackInfo {nullptr}

AudioPlayer *	m_audio {nullptr}

MythMediaBuffer *	m_ringBuffer {nullptr}

double	m_fps {29.97}

int	m_fpsMultiplier {1}

int	m_fpsSkip {0}

uint	m_bitrate {4000}

int	m_currentWidth {640}

int	m_currentHeight {480}

float	m_currentAspect {1.33333F}

long long	m_framesPlayed {0}

long long	m_framesRead {0}

uint64_t	m_frameCounter {0}

AVRational	m_totalDuration

int	m_keyframeDist {-1}

long long	m_lastKey {0}

long long	m_indexOffset {0}

MythAVCopy	m_copyFrame

bool	m_nextDecodedFrameIsKeyFrame { false }

EofState	m_atEof {kEofStateNone}

bool	m_trackTotalDuration {false}

bool	m_exitAfterDecoded {false}

bool	m_transcoding {false}

bool	m_hasFullPositionMap {false}

bool	m_recordingHasPositionMap {false}

bool	m_posmapStarted {false}

MarkTypes	m_positionMapType {MARK_UNSET}

QRecursiveMutex	m_positionMapLock

std::vector< PosMapEntry >	m_positionMap

frm_pos_map_t	m_frameToDurMap

frm_pos_map_t	m_durToFrameMap

QDateTime	m_lastPositionMapUpdate

uint64_t	m_seekSnap {UINT64_MAX}

bool	m_dontSyncPositionMap {false}

bool	m_livetv {false}

bool	m_watchingRecording {false}

bool	m_hasKeyFrameAdjustTable {false}

bool	m_getRawFrames {false}

bool	m_getRawVideo {false}

bool	m_errored {false}

bool	m_waitingForChange {false}

bool	m_justAfterChange {false}

long long	m_readAdjust {0}

int	m_videoRotation {0}

uint	m_stereo3D {0}

QRecursiveMutex	m_trackLock

bool	m_decodeAllSubtitles { false }

std::array< int, kTrackTypeCount >	m_currentTrack {}

std::array< sinfo_vec_t, kTrackTypeCount >	m_tracks

std::array< StreamInfo, kTrackTypeCount >	m_wantedTrack

std::array< StreamInfo, kTrackTypeCount >	m_selectedTrack

std::vector< int >	m_languagePreference
	language preferences for auto-selection of streams More...

MythCodecContext *	m_mythCodecCtx { nullptr }

MythVideoProfile	m_videoDisplayProfile

const VideoFrameTypes *	m_renderFormats { &MythVideoFrame::kDefaultRenderFormats }

Friends
void	HandleStreamChange (void *data)

int	get_avf_buffer (struct AVCodecContext c, AVFrame pic, int flags)

int	open_avf (URLContext h, const char filename, int flags)

int	read_avf (URLContext h, uint8_t buf, int buf_size)

int	write_avf (URLContext h, uint8_t buf, int buf_size)

int64_t	seek_avf (URLContext *h, int64_t offset, int whence)

int	close_avf (URLContext *h)

Detailed Description

A decoder for media files.

Definition at line 82 of file avformatdecoder.h.

Constructor & Destructor Documentation

◆ AvFormatDecoder() [1/2]

AvFormatDecoder::AvFormatDecoder	(	MythPlayer *	parent,
		const ProgramInfo &	pginfo,
		PlayerFlags	flags
	)

Definition at line 335 of file avformatdecoder.cpp.

◆ ~AvFormatDecoder()

AvFormatDecoder::~AvFormatDecoder ( )

override

Definition at line 365 of file avformatdecoder.cpp.

◆ AvFormatDecoder() [2/2]

AvFormatDecoder::AvFormatDecoder ( const AvFormatDecoder & )

delete

Member Function Documentation

◆ operator=()

AvFormatDecoder& AvFormatDecoder::operator= ( const AvFormatDecoder & )

delete

◆ SetEof()

void AvFormatDecoder::SetEof ( bool eof )

overridevirtual

Reimplemented from DecoderBase.

Definition at line 835 of file avformatdecoder.cpp.

Referenced by GetFrame().

◆ CodecMap()

MythCodecMap * AvFormatDecoder::CodecMap ( void )

Definition at line 396 of file avformatdecoder.cpp.

Referenced by MythMediaCodecContext::GetBestSupportedCodec(), and MythMMALContext::GetSupportedCodec().

◆ CloseCodecs()

void AvFormatDecoder::CloseCodecs ( )

Definition at line 401 of file avformatdecoder.cpp.

Referenced by CloseContext(), and MythBDDecoder::StreamChangeCheck().

◆ CloseContext()

void AvFormatDecoder::CloseContext ( )

Definition at line 415 of file avformatdecoder.cpp.

Referenced by OpenFile(), and ~AvFormatDecoder().

◆ Reset()

void AvFormatDecoder::Reset	(	bool	reset_video_data,
		bool	seek_reset,
		bool	reset_file
	)

overridevirtual

Reimplemented from DecoderBase.

Reimplemented in MythDVDDecoder.

Definition at line 847 of file avformatdecoder.cpp.

Referenced by OpenFile(), MythBDDecoder::Reset(), and MythDVDDecoder::Reset().

◆ CanHandle()

bool AvFormatDecoder::CanHandle	(	TestBufferVec &	testbuf,
		const QString &	filename
	)

static

Perform an av_probe_input_format on the passed data to see if we can decode it with this class.

Definition at line 866 of file avformatdecoder.cpp.

Referenced by MythBDPlayer::CreateDecoder(), MythDVDPlayer::CreateDecoder(), and MythPlayer::CreateDecoder().

◆ OpenFile()

int AvFormatDecoder::OpenFile	(	MythMediaBuffer *	Buffer,
		bool	novideo,
		TestBufferVec &	testbuf
	)

overridevirtual

Open our file and set up or audio and video parameters.

OpenFile opens a ringbuffer for playback.

OpenFile deletes any existing context then use testbuf to guess at the stream type. It then calls ScanStreams to find any valid streams to decode. If possible a position map is also built for quick skipping.

Parameters

rbuffer	pointer to a valid ringuffer.
novideo	if true then no video is sought in ScanSreams.
testbuf	Temporary buffer for probing the input.
testbufsize	The size of the test buffer. The minimum of this value or kDecoderProbeBufferSize will be used.

Implements DecoderBase.

Definition at line 957 of file avformatdecoder.cpp.

◆ GetFrame()

bool AvFormatDecoder::GetFrame	(	DecodeType	Type,
		bool &	Retry
	)

overridevirtual

Demux, preprocess and possibly decode a frame of video/audio.

Implements DecoderBase.

Reimplemented in MythDVDDecoder.

Definition at line 4819 of file avformatdecoder.cpp.

Referenced by MythDVDDecoder::GetFrame(), and SeekReset().

◆ IsLastFrameKey()

bool AvFormatDecoder::IsLastFrameKey ( void ) const

inlineoverridevirtual

Implements DecoderBase.

Definition at line 114 of file avformatdecoder.h.