mirror of
https://github.com/DKJone/DKWechatHelper.git
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102 lines
2.8 KiB
Objective-C
102 lines
2.8 KiB
Objective-C
// QGAnimatedImageBufferManager.m
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// Tencent is pleased to support the open source community by making vap available.
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//
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// Copyright (C) 2020 THL A29 Limited, a Tencent company. All rights reserved.
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//
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// Licensed under the MIT License (the "License"); you may not use this file except in
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// compliance with the License. You may obtain a copy of the License at
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//
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// http://opensource.org/licenses/MIT
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//
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// Unless required by applicable law or agreed to in writing, software distributed under the License is
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// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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// either express or implied. See the License for the specific language governing permissions and
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// limitations under the License.
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#import "QGAnimatedImageBufferManager.h"
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#import "QGVAPSafeMutableArray.h"
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@interface QGAnimatedImageBufferManager() {
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QGAnimatedImageDecodeConfig *_config; //解码配置
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}
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@end
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@implementation QGAnimatedImageBufferManager
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- (instancetype)initWithConfig:(QGAnimatedImageDecodeConfig *)config {
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if (self = [super init]) {
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_config = config;
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[self createBuffersWithConfig:config];
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}
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return self;
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}
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- (void)createBuffersWithConfig:(QGAnimatedImageDecodeConfig *)config {
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_buffers = [[QGVAPSafeMutableArray alloc] initWithCapacity:config.bufferCount];
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}
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/**
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取出指定的在缓冲区的帧，若不存在于缓冲区则返回空
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@param frameIndex 目标帧索引
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@return 帧数据
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*/
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- (QGBaseAnimatedImageFrame *)getBufferedFrame:(NSInteger)frameIndex {
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if (_buffers.count == 0) {
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//NSLog(@"fail buffer is nil");
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return nil;
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}
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NSInteger bufferIndex = frameIndex%_buffers.count;
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if (bufferIndex > _buffers.count-1) {
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//NSLog(@"fail");
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return nil;
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}
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id frame = [_buffers objectAtIndex:bufferIndex];
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if (![frame isKindOfClass:[QGBaseAnimatedImageFrame class]] || ([(QGBaseAnimatedImageFrame*)frame frameIndex] != frameIndex)) {
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return nil;
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}
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return frame;
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}
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- (QGBaseAnimatedImageFrame *)popVideoFrame {
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if (!_buffers.count) {
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return nil;
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}
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if (![_buffers.firstObject isKindOfClass:[QGBaseAnimatedImageFrame class]]) {
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return nil;
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}
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QGBaseAnimatedImageFrame *frame = _buffers.firstObject;
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[_buffers removeObjectAtIndex:0];
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return frame;
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}
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/**
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判断当前缓冲区是否被填满
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@return 只有当缓冲区所有区域都被QGBaseAnimatedImageFrame类型的数据填满才算缓冲区满
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*/
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- (BOOL)isBufferFull {
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__block BOOL isFull = YES;
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[_buffers enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
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if (![obj isKindOfClass:[QGBaseAnimatedImageFrame class]]) {
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isFull = NO;
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*stop = YES;
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}
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}];
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return isFull;
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}
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- (void)dealloc {
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}
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@end
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