mirror of https://github.com/axmolengine/axmol.git
110 lines
4.2 KiB
Objective-C
110 lines
4.2 KiB
Objective-C
/****************************************************************************
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Copyright (c) 2016 Chukong Technologies Inc.
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Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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Copyright (c) 2018 HALX99.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#pragma once
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#include <stdint.h>
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#import <AudioToolbox/ExtendedAudioFile.h>
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#include "audio/include/AudioDecoder.h"
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#include "platform/CCFileStream.h"
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namespace cocos2d
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{
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/**
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* @brief The class for decoding compressed audio file to PCM buffer.
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*/
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class AudioDecoderEXT : public AudioDecoder
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{
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public:
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static const uint32_t INVALID_FRAME_INDEX = UINT32_MAX;
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AudioDecoderEXT();
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~AudioDecoderEXT();
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/**
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* @brief Opens an audio file specified by a file path.
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* @return true if succeed, otherwise false.
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*/
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bool open(const std::string& path) override;
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/**
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* @brief Closes opened audio file.
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* @note The method will also be automatically invoked in the destructor.
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*/
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void close() override;
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/**
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* @brief Reads audio frames of PCM format.
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* @param framesToRead The number of frames excepted to be read.
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* @param pcmBuf The buffer to hold the frames to be read, its size should be >= |framesToRead| / samplesPerBlock *
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* _bytesPerBlock.
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* @return The number of frames actually read, it's probably less than 'framesToRead'. Returns 0 means reach the end
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* of file.
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*/
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uint32_t read(uint32_t framesToRead, char* pcmBuf) override;
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/**
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* @brief Reads fixed audio frames of PCM format.
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* @param framesToRead The number of frames excepted to be read.
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* @param pcmBuf The buffer to hold the frames to be read, its size should be >= |framesToRead| / samplesPerBlock *
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* _bytesPerBlock.
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* @return The number of frames actually read, it's probably less than |framesToRead|. Returns 0 means reach the end
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* of file.
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* @note The different between |read| and |readFixedFrames| is |readFixedFrames| will do multiple reading operations
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* if |framesToRead| frames isn't filled entirely, while |read| just does reading operation once whatever
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* |framesToRead| is or isn't filled entirely. If current position reaches the end of frames, the return value may
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* smaller than |framesToRead| and the remaining buffer in |pcmBuf| will be set with silence data (0x00).
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*/
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// uint32_t readFixedFrames(uint32_t framesToRead, char* pcmBuf) override;
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/**
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* @brief Sets frame offest to be read.
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* @param frameOffset The frame offest to be set.
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* @return true if succeed, otherwise false
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*/
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bool seek(uint32_t frameOffset) override;
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private:
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void closeInternal();
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static OSStatus readCallback(void* inClientData,
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SInt64 inPosition,
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UInt32 requestCount,
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void* buffer,
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UInt32* actualCount);
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static SInt64 getSizeCallback(void* inClientData);
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ExtAudioFileRef _extRef;
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std::unique_ptr<cocos2d::FileStream> _fileStream;
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SInt64 _streamSize;
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AudioFileID _audioFileId;
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AudioStreamBasicDescription _outputFormat;
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};
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} // namespace cocos2d
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