AVI Container Decoder which can be fed with small chunks of data. The minimum length must be bigger then the header size! The file structure is documented at https://learn.microsoft.com/en-us/windows/win32/directshow/avi-riff-file-reference. More...

#include <ContainerAVI.h>

Inheritance diagram for AVIDecoder:

Public Member Functions
	AVIDecoder (AudioDecoder audioDecoder, VideoOutput videoOut=nullptr, int bufferSize=1024)

	AVIDecoder (int bufferSize=1024)

virtual void	addNotifyAudioChange (AudioInfoSupport &bi)
	Adds target to be notified about audio changes.

AudioFormat	audioFormat ()
	Provides the audio_info.wFormatTag.

virtual AudioInfo	audioInfo ()
	provides the actual input AudioInfo

virtual AudioInfo	audioInfoOut ()
	provides the actual output AudioInfo: this is usually the same as audioInfo() unless we use a transforming stream

WAVFormatX	aviAudioInfo ()
	Provides the audio information.

BitmapInfoHeader	aviVideoInfo ()
	Provides the video information.

bool	begin () override

virtual bool	begin (AudioInfo info) override

virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.

void	end () override

bool	isMetadataReady ()
	Returns true if all metadata has been parsed and is available.

bool	isNotifyActive ()
	Checks if the automatic AudioInfo update is active.

AVIMainHeader	mainHeader ()
	Provides the information from the main header chunk.

	operator bool () override

virtual bool	removeNotifyAudioChange (AudioInfoSupport &bi)
	Removes a target in order not to be notified about audio changes.

virtual void	setAudioInfo (AudioInfo from) override
	for most decoders this is not needed

void	setMute (bool mute)

void	setNotifyActive (bool flag)
	Deactivate/Reactivate automatic AudioInfo updates: (default is active)

virtual void	setOutput (AudioOutput &out_stream)
	Defines where the decoded result is written to.

virtual void	setOutput (AudioStream &out_stream)
	Defines where the decoded result is written to.

virtual void	setOutput (Print &out_stream) override
	Defines the audio output stream - usually called by EncodedAudioStream.

virtual void	setOutputVideoStream (VideoOutput &out_stream)

void	setValidationCallback (bool(*cb)(AVIDecoder &avi))

void	setVideoAudioSync (VideoAudioSync *yourSync)
	Replace the synchronization logic with your implementation.

AVIStreamHeader	streamHeader (int idx)
	Provides the information from the stream header chunks.

const char *	videoFormat ()

int	videoSeconds ()
	Provide the length of the video in seconds.

virtual size_t	write (const uint8_t *data, size_t len) override

Public Attributes
int	id
	custom id to be used by application

Protected Member Functions
void	cleanupStack ()

void	consume (int len)
	We remove the processed bytes from the beginning of the buffer.

uint32_t	getInt (int offset)
	Provides the int32 at the indicated byte offset.

StrView &	getStr (int offset, int len)
	Provides the string at the indicated byte offset with the indicated length.

bool	isCurrentStreamAudio ()

bool	isCurrentStreamVideo ()

void	notifyAudioChange (AudioInfo info)

bool	parse ()

ParseObject	parseAVIStreamData ()

ParseObject	parseChunk (const char *id)
	We load the indicated chunk from the current data.

bool	parseHeader ()

ParseObject	parseList (const char *id)
	We load the indicated list from the current data.

void	processStack (ParseObject &result)

void	setupAudioInfo ()

void	setupVideoInfo ()

ParseObject	tryParseChunk ()

ParseObject	tryParseChunk (const char *id)

ParseObject	tryParseList ()
	We try to parse the actual state for any list.

ParseObject	tryParseList (const char *id)

void	writeBlocking (Print out, uint8_t data, size_t len)

void	writeData ()

Protected Attributes
WAVFormatX	audio_info

Vector< StreamContentType >	content_types

CopyDecoder	copy_decoder

long	current_pos = 0

ParseObject	current_stream_data

VideoAudioSync	defaultSynch

bool	header_is_avi = false

AudioInfo	info

bool	is_metadata_ready = false

bool	is_mute = false

bool	is_notify_active = true

bool	is_parsing_active = true

AVIMainHeader	main_header

long	movi_end_pos = 0

Vector< AudioInfoSupport * >	notify_vector

Stack< ParseObject >	object_stack

long	open_subchunk_len = 0

AudioDecoder *	p_decoder = nullptr

EncodedAudioOutput *	p_output_audio = nullptr

VideoOutput *	p_output_video = nullptr

Print *	p_print = nullptr

VideoAudioSync *	p_synch = &defaultSynch

ParseBuffer	parse_buffer

ParseState	parse_state = ParseHeader

Str	spaces

Str	str

Vector< AVIStreamHeader >	stream_header

int	stream_header_idx = -1

bool(*	validation_cb )(AVIDecoder &avi) = nullptr

char	video_format [5] = {0}

BitmapInfoHeader	video_info

int	video_seconds = 0

Detailed Description

AVI Container Decoder which can be fed with small chunks of data. The minimum length must be bigger then the header size! The file structure is documented at https://learn.microsoft.com/en-us/windows/win32/directshow/avi-riff-file-reference.

Author: Phil Schatzmann

Copyright: GPLv3

Member Function Documentation

◆ setValidationCallback()

void setValidationCallback ( bool(*)(AVIDecoder &avi) cb )

inline

Register a validation callback which is called after parsing just before playing the audio

◆ tryParseChunk() [1/2]

ParseObject tryParseChunk ( )

inlineprotected

We parse a chunk and provide the FOURCC id and size: No content data is stored

◆ tryParseChunk() [2/2]

ParseObject tryParseChunk ( const char * id )

inlineprotected

We try to parse the indicated chunk and determine the size: No content data is stored

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

src/AudioTools/AudioCodecs/ContainerAVI.h

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation

◆ setValidationCallback()

◆ tryParseChunk() [1/2]

◆ tryParseChunk() [2/2]