An instance of this class is used to manage multiple AudioThumbnail objects. More...

#include "juce_AudioThumbnailCache.h"

Classes
class	ThumbnailCacheEntry

Public Member Functions
	AudioThumbnailCache (int maxNumThumbsToStore)
	Creates a cache object.

virtual	~AudioThumbnailCache ()
	Destructor.

void	clear ()
	Clears out any stored thumbnails.

bool	loadThumb (AudioThumbnailBase &thumb, int64 hashCode)
	Reloads the specified thumb if this cache contains the appropriate stored data.

void	storeThumb (const AudioThumbnailBase &thumb, int64 hashCode)
	Stores the cacheable data from the specified thumb in this cache.

void	removeThumb (int64 hashCode)
	Tells the cache to forget about the thumb with the given hashcode.

bool	readFromStream (InputStream &source)
	Attempts to re-load a saved cache of thumbnails from a stream.

void	writeToStream (OutputStream &stream)
	Writes all currently-loaded cache data to a stream.

TimeSliceThread &	getTimeSliceThread () noexcept
	Returns the thread that client thumbnails can use.

Protected Member Functions
virtual void	saveNewlyFinishedThumbnail (const AudioThumbnailBase &, int64 hashCode)
	This can be overridden to provide a custom callback for saving thumbnails once they have finished being loaded.

virtual bool	loadNewThumb (AudioThumbnailBase &, int64 hashCode)
	This can be overridden to provide a custom callback for loading thumbnails from pre-saved files to save the cache the trouble of having to create them.

Detailed Description

An instance of this class is used to manage multiple AudioThumbnail objects.

The cache runs a single background thread that is shared by all the thumbnails that need it, and it maintains a set of low-res previews in memory, to avoid having to re-scan audio files too often.

See also: AudioThumbnail

@tags{Audio}

Definition at line 41 of file juce_AudioThumbnailCache.h.

Constructor & Destructor Documentation

◆ AudioThumbnailCache()

juce::AudioThumbnailCache::AudioThumbnailCache ( int maxNumThumbsToStore )

explicit

Creates a cache object.

The maxNumThumbsToStore parameter lets you specify how many previews should be kept in memory at once.

Definition at line 62 of file juce_AudioThumbnailCache.cpp.

◆ ~AudioThumbnailCache()

juce::AudioThumbnailCache::~AudioThumbnailCache ( )

virtual

Destructor.

Definition at line 70 of file juce_AudioThumbnailCache.cpp.

Member Function Documentation

◆ clear()

void juce::AudioThumbnailCache::clear ( )

Clears out any stored thumbnails.

Definition at line 142 of file juce_AudioThumbnailCache.cpp.

◆ getTimeSliceThread()

TimeSliceThread & juce::AudioThumbnailCache::getTimeSliceThread ( )

noexcept

Returns the thread that client thumbnails can use.

Definition at line 90 of file juce_AudioThumbnailCache.h.

◆ loadNewThumb()

bool juce::AudioThumbnailCache::loadNewThumb	(	AudioThumbnailBase &	,
		int64	hashCode
	)

protectedvirtual

This can be overridden to provide a custom callback for loading thumbnails from pre-saved files to save the cache the trouble of having to create them.

Definition at line 192 of file juce_AudioThumbnailCache.cpp.