WAVE_PCM_EssenceSubParser::ESP_EssenceSource Class Reference

Class for EssenceSource objects for parsing/sourcing MPEG-VES essence. More...

#include <esp_wavepcm.h>

Inheritance diagram for WAVE_PCM_EssenceSubParser::ESP_EssenceSource:

List of all members.

Public Member Functions
	ESP_EssenceSource (EssenceSubParserPtr TheCaller, FileHandle InFile, UInt32 UseStream, UInt64 Count=1)
	Construct and initialise for essence parsing/sourcing.
virtual size_t	GetEssenceDataSize (void)
	Get the size of the essence data in bytes.
virtual DataChunkPtr	GetEssenceData (size_t Size=0, size_t MaxSize=0)
	Get the next "installment" of essence data.
virtual bool	EndOfItem (void)
	Did the last call to GetEssenceData() return the end of a wrapping item.
virtual int	GetBERSize (void)
	Get the preferred BER length size for essence KLVs written from this source, 0 for auto.
Protected Attributes
size_t	BytesRemaining
	The number of bytes remaining in a multi-part GetEssenceData, or zero if not part read.

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Detailed Description

Class for EssenceSource objects for parsing/sourcing MPEG-VES essence.

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Constructor & Destructor Documentation

ESP_EssenceSource	(	EssenceSubParserPtr	TheCaller,
		FileHandle	InFile,
		UInt32	UseStream,
		UInt64	Count = 1
	)			[inline]

Construct and initialise for essence parsing/sourcing.

Reimplemented from EssenceSubParser::ESP_EssenceSource.

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Member Function Documentation

virtual size_t GetEssenceDataSize

(

void

)

[inline, virtual]

Get the size of the essence data in bytes.

Note:

There is intentionally no support for an "unknown" response

Implements EssenceSource.

DataChunkPtr GetEssenceData	(	size_t	Size = 0,
		size_t	MaxSize = 0
	)			[virtual]

Get the next "installment" of essence data.

Returns:

Pointer to a data chunk holding the next data or a NULL pointer when no more remains

Note:

If there is more data to come but it is not currently available the return value will be a pointer to an empty data chunk

If Size = 0 the object will decide the size of the chunk to return

On no account will the returned chunk be larger than MaxSize (if MaxSize > 0)

Reimplemented from EssenceSubParser::ESP_EssenceSource.

virtual bool EndOfItem

(

void

)

[inline, virtual]

Did the last call to GetEssenceData() return the end of a wrapping item.

Returns:

true if the last call to GetEssenceData() returned an entire wrapping unit.

true if the last call to GetEssenceData() returned the last chunk of a wrapping unit.

true if the last call to GetEssenceData() returned the end of a clip-wrapped clip.

false if there is more data pending for the current wrapping unit.

false if the source is to be clip-wrapped and there is more data pending for the clip

Reimplemented from EssenceSubParser::ESP_EssenceSource.

virtual int GetBERSize

(

void

)

[inline, virtual]

Get the preferred BER length size for essence KLVs written from this source, 0 for auto.

Reimplemented from EssenceSource.

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Member Data Documentation

size_t BytesRemaining [protected]

The number of bytes remaining in a multi-part GetEssenceData, or zero if not part read.

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

• esp_wavepcm.h
• esp_wavepcm.cpp

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