RamSampleTableStore< T > Class Template Reference

Keeps every entry in RAM (a plain Vector<T>) - the simplest and fastest option, but scales with the track's total sample/chunk count (e.g. ~4.5MB total for a 102-minute movie's stsz+stco tables). Default if no other SampleTableStore is configured. More...

#include <SampleTableStore.h>

Inheritance diagram for RamSampleTableStore< T >:

Collaboration diagram for RamSampleTableStore< T >:

Public Member Functions
void	append (T value) override
	Appends one entry - call in file order, once per table entry.
void	clear () override
	Resets to empty - call once per begin()/track.
T	get (size_t index) override
	Reads back entry 'index' - index must be < size().
virtual void	setNextEntryOffset (uint64_t fileOffset)
virtual void	setOnDiskEntrySize (size_t bytes)
size_t	size () override
	Number of entries appended so far.

Protected Attributes
Vector< T >	data

Detailed Description

template<typename T>
class audio_tools::RamSampleTableStore< T >

Keeps every entry in RAM (a plain Vector<T>) - the simplest and fastest option, but scales with the track's total sample/chunk count (e.g. ~4.5MB total for a 102-minute movie's stsz+stco tables). Default if no other SampleTableStore is configured.

Member Function Documentation

append()

template<typename T >

void append ( T  value )

inlineoverridevirtual

Appends one entry - call in file order, once per table entry.

Implements SampleTableStore< T >.

clear()

template<typename T >

void clear ( )

inlineoverridevirtual

Resets to empty - call once per begin()/track.

Implements SampleTableStore< T >.

get()

template<typename T >

T get ( size_t  index )

inlineoverridevirtual

Reads back entry 'index' - index must be < size().

Implements SampleTableStore< T >.

setNextEntryOffset()

template<typename T >

virtual void setNextEntryOffset ( uint64_t  fileOffset )

inlinevirtualinherited

Only meaningful for SourceSeekSampleTableStore: the absolute byte offset (from the start of the original MP4 file) of the entry about to be appended next. Default no-op - other implementations ignore it, so callers can always call this unconditionally before append() without needing to know which implementation is active.

Reimplemented in SourceSeekSampleTableStore< T >.

setOnDiskEntrySize()

template<typename T >

virtual void setOnDiskEntrySize ( size_t  bytes )

inlinevirtualinherited

Only meaningful for SourceSeekSampleTableStore, and only for tables whose on-disk width isn't a fixed sizeof(T) - see its comment. Default no-op.

Reimplemented in SourceSeekSampleTableStore< T >.

size()

template<typename T >

size_t size ( )

inlineoverridevirtual

Number of entries appended so far.

Implements SampleTableStore< T >.

Member Data Documentation

data

template<typename T >

Vector<T> data

protected

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

• src/AudioTools/AudioCodecs/SampleTableStore.h