#include <avi_decoder.h>

Inheritance diagram for Video::AVIDecoder:

Classes
class	AVIAudioTrack

struct	AVIHeader

struct	AVIStreamHeader

class	AVIVideoTrack

struct	BitmapInfoHeader

class	IndexEntries

struct	OldIndex

struct	PCMWaveFormat

struct	TrackStatus

struct	WaveFormat

struct	WaveFormatEX

Public Member Functions
	AVIDecoder (const Common::Rational &frameRateOverride)

bool	loadStream (Common::SeekableReadStream *stream)

void	close ()

uint16	getWidth () const

uint16	getHeight () const

bool	rewind ()

bool	isRewindable () const

bool	isSeekable () const

virtual const Graphics::Surface *	decodeNextFrame ()

const Graphics::Surface *	decodeNextTransparency ()

virtual AVIAudioTrack *	createAudioTrack (AVIStreamHeader sHeader, PCMWaveFormat wvInfo)

virtual bool	seekToFrame (uint frame)

Public Member Functions inherited from Video::VideoDecoder
virtual bool	loadFile (const Common::Path &filename)

bool	isVideoLoaded () const

void	start ()

void	stop ()

void	setRate (const Common::Rational &rate)

Common::Rational	getRate () const

bool	isPlaying () const

bool	seek (const Audio::Timestamp &time)

void	pauseVideo (bool pause)

bool	isPaused () const

void	setEndTime (const Audio::Timestamp &endTime)

void	setEndFrame (uint frame)

Audio::Timestamp	getEndTime () const

void	resetStartTime ()

bool	endOfVideo () const

int	getCurFrame () const

uint32	getFrameCount () const

uint32	getTime () const

Graphics::PixelFormat	getPixelFormat () const

virtual Audio::Timestamp	getDuration () const

const byte *	getPalette ()

bool	hasDirtyPalette () const

void	delayMillis (uint msecs)

uint32	getTimeToNextFrame () const

bool	needsUpdate () const

bool	setReverse (bool reverse)

bool	setDitheringPalette (const byte *palette)

bool	setOutputPixelFormat (const Graphics::PixelFormat &format)

virtual void	setVideoCodecAccuracy (Image::CodecAccuracy accuracy)

byte	getVolume () const

void	setVolume (byte volume)

int8	getBalance () const

void	setBalance (int8 balance)

Audio::Mixer::SoundType	getSoundType () const

void	setSoundType (Audio::Mixer::SoundType soundType)

bool	addStreamTrack (Audio::SeekableAudioStream *stream)

bool	addStreamFileTrack (const Common::Path &baseName)

bool	setAudioTrack (int index)

uint	getAudioTrackCount () const

Protected Types
enum	IndexFlags { AVIIF_INDEX = 0x10 }

enum	AVIFlags { AVIF_HASINDEX = 0x00000010, AVIF_MUSTUSEINDEX = 0x00000020, AVIF_ISINTERLEAVED = 0x00000100, AVIF_TRUSTCKTYPE = 0x00000800, AVIF_WASCAPTUREFILE = 0x00010000, AVIF_WASCOPYRIGHTED = 0x00020000 }

Protected Types inherited from Video::VideoDecoder
typedef Common::Array< Track * >	TrackList

typedef TrackList::iterator	TrackListIterator

Protected Member Functions
void	readNextPacket ()

bool	seekIntern (const Audio::Timestamp &time)

bool	supportsAudioTrackSwitching () const

AudioTrack *	getAudioTrack (int index)

void	addTrack (Track *track, bool isExternal=false)

void	readOldIndex (uint32 size)

void	initCommon ()

bool	parseNextChunk ()

void	skipChunk (uint32 size)

void	handleList (uint32 listSize)

void	handleStreamHeader (uint32 size)

void	readStreamName (uint32 size)

void	readPalette8 (uint32 size)

uint16	getStreamType (uint32 tag) const

void	checkTruemotion1 ()

uint	getVideoTrackOffset (uint trackIndex, uint frameNumber=0)

void	handleNextPacket (TrackStatus &status)

bool	shouldQueueAudio (TrackStatus &status)

void	seekTransparencyFrame (int frame)

Protected Member Functions inherited from Video::VideoDecoder
void	resetPauseStartTime ()

void	addTrack (Track *track, bool isExternal=false)

virtual bool	useAudioSync () const

Track *	getTrack (uint track)

const Track *	getTrack (uint track) const

bool	endOfVideoTracks () const

VideoTrack *	findNextVideoTrack ()

TrackListIterator	getTrackListBegin ()

TrackListIterator	getTrackListEnd ()

void	eraseTrack (Track *track)

void	stopAudio ()

void	setAudioRate (Common::Rational rate)

void	startAudio ()

void	startAudioLimit (const Audio::Timestamp &limit)

bool	hasFramesLeft () const

bool	hasAudio () const

Static Protected Member Functions
static byte	getStreamIndex (uint32 tag)

Protected Attributes
AVIHeader	_header

IndexEntries	_indexEntries

Common::SeekableReadStream *	_fileStream

bool	_decodedHeader

bool	_foundMovieList

uint32	_movieListStart

uint32	_movieListEnd

Common::Rational	_frameRateOverride

int	_videoTrackCounter

int	_audioTrackCounter

Track *	_lastAddedTrack

Common::Array< TrackStatus >	_videoTracks

Common::Array< TrackStatus >	_audioTracks

TrackStatus	_transparencyTrack

Protected Attributes inherited from Video::VideoDecoder
Audio::Timestamp	_lastTimeChange

int32	_startTime

VideoTrack *	_nextVideoTrack

Image::CodecAccuracy	_videoCodecAccuracy

Detailed Description

Decoder for AVI videos.

Video decoder used in engines:

petka
sci
sword1
sword2
titanic
vcruise
zvision

Member Function Documentation

◆ loadStream()

bool Video::AVIDecoder::loadStream ( Common::SeekableReadStream * stream )

virtual

Load a video from a generic read stream. The ownership of the stream object transfers to this VideoDecoder instance, which is hence also responsible for eventually deleting it.

Implementations of this function are required to call addTrack() for each track in the video upon success.

Parameters

stream the stream to load

Returns: whether loading the stream succeeded

Implements Video::VideoDecoder.

◆ close()

void Video::AVIDecoder::close ( )

virtual

Close the active video stream and free any associated resources.

All subclasses that need to close their own resources should still call the base class' close() function at the start of their function.

Reimplemented from Video::VideoDecoder.

◆ getWidth()

uint16 Video::AVIDecoder::getWidth ( ) const

inlinevirtual

Returns the width of the video's frames.

By default, this finds the largest width between all of the loaded tracks. However, a subclass may override this if it does any kind of post-processing on it.

Returns: the width of the video's frames

Reimplemented from Video::VideoDecoder.

◆ getHeight()

uint16 Video::AVIDecoder::getHeight ( ) const

inlinevirtual

Returns the height of the video's frames.

By default, this finds the largest height between all of the loaded tracks. However, a subclass may override this if it does any kind of post-processing on it.

Returns: the height of the video's frames

Reimplemented from Video::VideoDecoder.

◆ rewind()

bool Video::AVIDecoder::rewind ( )

virtual

Rewind a video to its beginning.

If the video is playing, it will continue to play. The default implementation will rewind each track.

Returns: true on success, false otherwise

Reimplemented from Video::VideoDecoder.

◆ isRewindable()

bool Video::AVIDecoder::isRewindable ( ) const

inlinevirtual

Returns if a video is rewindable or not. The default implementation polls each track for rewindability.

Reimplemented from Video::VideoDecoder.

◆ isSeekable()

bool Video::AVIDecoder::isSeekable ( ) const

virtual

Returns if a video is seekable or not. The default implementation polls each track for seekability.

Reimplemented from Video::VideoDecoder.

◆ decodeNextFrame()

virtual const Graphics::Surface* Video::AVIDecoder::decodeNextFrame ( )

virtual

Decode the next frame into a surface and return the latter.

A subclass may override this, but must still call this function. As an example, a subclass may do this to apply some global video scale to individual track's frame.

Note that this will call readNextPacket() internally first before calling the next video track's decodeNextFrame() function.

Returns: a surface containing the decoded frame, or 0

Note: Ownership of the returned surface stays with the VideoDecoder, hence the caller must not free it.; this may return 0, in which case the last frame should be kept on screen

Reimplemented from Video::VideoDecoder.

◆ decodeNextTransparency()

const Graphics::Surface* Video::AVIDecoder::decodeNextTransparency ( )

Decodes the next transparency track frame

◆ readNextPacket()

void Video::AVIDecoder::readNextPacket ( )

protectedvirtual

Decode enough data for the next frame and enough audio to last that long.

This function is used by this class' decodeNextFrame() function. A subclass of a Track may decide to just have its decodeNextFrame() function read and decode the frame, but only if it is the only track in the video.

Reimplemented from Video::VideoDecoder.

◆ seekIntern()

bool Video::AVIDecoder::seekIntern ( const Audio::Timestamp & time )

protectedvirtual

The internal seek function that does the actual seeking.

See also: seek()

Returns: true on success, false otherwise

Reimplemented from Video::VideoDecoder.

◆ supportsAudioTrackSwitching()

bool Video::AVIDecoder::supportsAudioTrackSwitching ( ) const

inlineprotectedvirtual

Does this video format support switching between audio tracks?

Returning true implies this format supports multiple audio tracks, can switch tracks, and defaults to playing the first found audio track.

Reimplemented from Video::VideoDecoder.

◆ getAudioTrack()

AudioTrack* Video::AVIDecoder::getAudioTrack ( int index )

protectedvirtual

Get the audio track for the given index.

This is used only if supportsAudioTrackSwitching() returns true.

Parameters

index The index of the track, whose meaning is dependent on the container

Returns: The audio track for the index, or 0 if not found

Reimplemented from Video::VideoDecoder.

◆ addTrack()

void Video::AVIDecoder::addTrack	(	Track *	track,
		bool	isExternal = `false`
	)

protected

Define a track to be used by this class.

The pointer is then owned by this base class.

Parameters

track	The track to add
isExternal	Is this an external track not found by loadStream()?

◆ seekToFrame()

virtual bool Video::AVIDecoder::seekToFrame ( uint frame )

virtual

Seek to a given frame.

This only works when the video track(s) supports getFrameTime(). This calls seek() internally.

Reimplemented from Video::VideoDecoder.

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

video/avi_decoder.h

Classes

Public Member Functions

Protected Types

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation

◆ loadStream()

◆ close()

◆ getWidth()

◆ getHeight()

◆ rewind()

◆ isRewindable()

◆ isSeekable()

◆ decodeNextFrame()

◆ decodeNextTransparency()

◆ readNextPacket()

◆ seekIntern()

◆ supportsAudioTrackSwitching()

◆ getAudioTrack()

◆ addTrack()

◆ seekToFrame()