mirror of
https://github.com/DKJone/DKWechatHelper.git
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71 lines
1.8 KiB
Objective-C
71 lines
1.8 KiB
Objective-C
// QGBaseDecoder.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 "QGBaseDecoder.h"
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#import "QGAnimatedImageDecodeThreadPool.h"
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@interface QGBaseDecoder() {
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QGBaseDFileInfo *_fileInfo;
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}
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@end
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@implementation QGBaseDecoder
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- (instancetype)initWith:(QGBaseDFileInfo *)fileInfo error:(NSError **)error {
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if (self = [super init]) {
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_currentDecodeFrame = -1;
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_fileInfo = fileInfo;
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_fileInfo.occupiedCount ++;
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}
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return self;
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}
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- (QGBaseDFileInfo *)fileInfo {
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return _fileInfo;
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}
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/**
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由具体子类实现
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该方法在decodeframe方法即将被调用时调用，如果返回YES则停止解码工作
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@param nextFrameIndex 将要解码的帧索引
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@return 是否需要继续解码
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*/
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- (BOOL)shouldStopDecode:(NSInteger)nextFrameIndex {
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// No implementation here. Meant to be overriden in subclass.
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return NO;
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}
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- (BOOL)isFrameIndexBeyondEnd:(NSInteger)frameIndex {
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return NO;
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}
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/**
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在专用线程内解码指定帧并放入对应的缓冲区内
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@param frameIndex 帧索引
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@param buffers 缓冲
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*/
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- (void)decodeFrame:(NSInteger)frameIndex buffers:(NSMutableArray *)buffers {
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// No implementation here. Meant to be overriden in subclass.
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}
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@end
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