#import "GPUImageFramebufferCache.h"
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#import "GPUImageContext.h"
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#import "GPUImageOutput.h"
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#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
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#import <UIKit/UIKit.h>
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#else
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#endif
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@interface GPUImageFramebufferCache()
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{
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// NSCache *framebufferCache;
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NSMutableDictionary *framebufferCache;
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NSMutableDictionary *framebufferTypeCounts;
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NSMutableArray *activeImageCaptureList; // Where framebuffers that may be lost by a filter, but which are still needed for a UIImage, etc., are stored
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id memoryWarningObserver;
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dispatch_queue_t framebufferCacheQueue;
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}
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- (NSString *)hashForSize:(CGSize)size textureOptions:(GPUTextureOptions)textureOptions onlyTexture:(BOOL)onlyTexture;
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@end
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@implementation GPUImageFramebufferCache
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#pragma mark -
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#pragma mark Initialization and teardown
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- (id)init;
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{
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if (!(self = [super init]))
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{
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return nil;
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}
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#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
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memoryWarningObserver = [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidReceiveMemoryWarningNotification object:nil queue:nil usingBlock:^(NSNotification *note) {
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[self purgeAllUnassignedFramebuffers];
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}];
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#else
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#endif
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// framebufferCache = [[NSCache alloc] init];
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framebufferCache = [[NSMutableDictionary alloc] init];
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framebufferTypeCounts = [[NSMutableDictionary alloc] init];
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activeImageCaptureList = [[NSMutableArray alloc] init];
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framebufferCacheQueue = dispatch_queue_create("com.sunsetlakesoftware.GPUImage.framebufferCacheQueue", NULL);
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return self;
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}
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#pragma mark -
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#pragma mark Framebuffer management
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- (NSString *)hashForSize:(CGSize)size textureOptions:(GPUTextureOptions)textureOptions onlyTexture:(BOOL)onlyTexture;
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{
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if (onlyTexture)
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{
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return [NSString stringWithFormat:@"%.1fx%.1f-%d:%d:%d:%d:%d:%d:%d-NOFB", size.width, size.height, textureOptions.minFilter, textureOptions.magFilter, textureOptions.wrapS, textureOptions.wrapT, textureOptions.internalFormat, textureOptions.format, textureOptions.type];
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}
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else
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{
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return [NSString stringWithFormat:@"%.1fx%.1f-%d:%d:%d:%d:%d:%d:%d", size.width, size.height, textureOptions.minFilter, textureOptions.magFilter, textureOptions.wrapS, textureOptions.wrapT, textureOptions.internalFormat, textureOptions.format, textureOptions.type];
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}
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}
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- (GPUImageFramebuffer *)fetchFramebufferForSize:(CGSize)framebufferSize textureOptions:(GPUTextureOptions)textureOptions onlyTexture:(BOOL)onlyTexture;
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{
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__block GPUImageFramebuffer *framebufferFromCache = nil;
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// dispatch_sync(framebufferCacheQueue, ^{
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runSynchronouslyOnVideoProcessingQueue(^{
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NSString *lookupHash = [self hashForSize:framebufferSize textureOptions:textureOptions onlyTexture:onlyTexture];
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NSNumber *numberOfMatchingTexturesInCache = [framebufferTypeCounts objectForKey:lookupHash];
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NSInteger numberOfMatchingTextures = [numberOfMatchingTexturesInCache integerValue];
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if ([numberOfMatchingTexturesInCache integerValue] < 1)
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{
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// Nothing in the cache, create a new framebuffer to use
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framebufferFromCache = [[GPUImageFramebuffer alloc] initWithSize:framebufferSize textureOptions:textureOptions onlyTexture:onlyTexture];
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}
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else
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{
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// Something found, pull the old framebuffer and decrement the count
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NSInteger currentTextureID = (numberOfMatchingTextures - 1);
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while ((framebufferFromCache == nil) && (currentTextureID >= 0))
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{
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NSString *textureHash = [NSString stringWithFormat:@"%@-%ld", lookupHash, (long)currentTextureID];
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framebufferFromCache = [framebufferCache objectForKey:textureHash];
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// Test the values in the cache first, to see if they got invalidated behind our back
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if (framebufferFromCache != nil)
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{
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// Withdraw this from the cache while it's in use
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[framebufferCache removeObjectForKey:textureHash];
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}
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currentTextureID--;
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}
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currentTextureID++;
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[framebufferTypeCounts setObject:[NSNumber numberWithInteger:currentTextureID] forKey:lookupHash];
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if (framebufferFromCache == nil)
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{
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framebufferFromCache = [[GPUImageFramebuffer alloc] initWithSize:framebufferSize textureOptions:textureOptions onlyTexture:onlyTexture];
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}
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}
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});
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[framebufferFromCache lock];
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return framebufferFromCache;
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}
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- (GPUImageFramebuffer *)fetchFramebufferForSize:(CGSize)framebufferSize onlyTexture:(BOOL)onlyTexture;
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{
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GPUTextureOptions defaultTextureOptions;
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defaultTextureOptions.minFilter = GL_LINEAR;
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defaultTextureOptions.magFilter = GL_LINEAR;
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defaultTextureOptions.wrapS = GL_CLAMP_TO_EDGE;
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defaultTextureOptions.wrapT = GL_CLAMP_TO_EDGE;
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defaultTextureOptions.internalFormat = GL_RGBA;
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defaultTextureOptions.format = GL_BGRA;
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defaultTextureOptions.type = GL_UNSIGNED_BYTE;
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return [self fetchFramebufferForSize:framebufferSize textureOptions:defaultTextureOptions onlyTexture:onlyTexture];
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}
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- (void)returnFramebufferToCache:(GPUImageFramebuffer *)framebuffer;
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{
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[framebuffer clearAllLocks];
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// dispatch_async(framebufferCacheQueue, ^{
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runAsynchronouslyOnVideoProcessingQueue(^{
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CGSize framebufferSize = framebuffer.size;
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GPUTextureOptions framebufferTextureOptions = framebuffer.textureOptions;
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NSString *lookupHash = [self hashForSize:framebufferSize textureOptions:framebufferTextureOptions onlyTexture:framebuffer.missingFramebuffer];
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NSNumber *numberOfMatchingTexturesInCache = [framebufferTypeCounts objectForKey:lookupHash];
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NSInteger numberOfMatchingTextures = [numberOfMatchingTexturesInCache integerValue];
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NSString *textureHash = [NSString stringWithFormat:@"%@-%ld", lookupHash, (long)numberOfMatchingTextures];
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// [framebufferCache setObject:framebuffer forKey:textureHash cost:round(framebufferSize.width * framebufferSize.height * 4.0)];
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[framebufferCache setObject:framebuffer forKey:textureHash];
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[framebufferTypeCounts setObject:[NSNumber numberWithInteger:(numberOfMatchingTextures + 1)] forKey:lookupHash];
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});
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}
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- (void)purgeAllUnassignedFramebuffers;
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{
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runAsynchronouslyOnVideoProcessingQueue(^{
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// dispatch_async(framebufferCacheQueue, ^{
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[framebufferCache removeAllObjects];
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[framebufferTypeCounts removeAllObjects];
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#if TARGET_IPHONE_SIMULATOR || TARGET_OS_IPHONE
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CVOpenGLESTextureCacheFlush([[GPUImageContext sharedImageProcessingContext] coreVideoTextureCache], 0);
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#else
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#endif
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});
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}
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- (void)addFramebufferToActiveImageCaptureList:(GPUImageFramebuffer *)framebuffer;
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{
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runAsynchronouslyOnVideoProcessingQueue(^{
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// dispatch_async(framebufferCacheQueue, ^{
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[activeImageCaptureList addObject:framebuffer];
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});
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}
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- (void)removeFramebufferFromActiveImageCaptureList:(GPUImageFramebuffer *)framebuffer;
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{
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runAsynchronouslyOnVideoProcessingQueue(^{
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// dispatch_async(framebufferCacheQueue, ^{
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[activeImageCaptureList removeObject:framebuffer];
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});
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}
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@end
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