mirror of https://github.com/axmolengine/axmol.git
137 lines
4.3 KiB
C++
137 lines
4.3 KiB
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 "audio/include/AudioDecoder.h"
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#include "platform/PXFileStream.h"
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namespace cocos2d {
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// http://soundfile.sapp.org/doc/WaveFormat/
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enum class WAV_FORMAT : uint16_t
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{
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UNKNOWN = 0x0, // Unknown Wave Format
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PCM = 0x1, // PCM Format
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ADPCM = 0x2, // Microsoft ADPCM Format
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IEEE = 0x3, // IEEE float/double
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ALAW = 0x6, // 8-bit ITU-T G.711 A-law
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MULAW = 0x7, // 8-bit ITU-T G.711 MUL-law
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IMA_ADPCM = 0x11, // IMA ADPCM Format
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EXT = 0xFFFE // Set via subformat
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};
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#pragma pack(push,1)
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struct WAV_CHUNK_HEADER {
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uint32_t ChunkID;
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/*
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** The ChunkSize gives the size of the valid data in the chunk. It does not include the padding, the size of chunkID, or the size of chunkSize.
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** see: https://docs.microsoft.com/en-us/windows/win32/xaudio2/resource-interchange-file-format--riff-
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*/
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uint32_t ChunkSize;
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};
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struct WAV_RIFF_CHUNK {
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WAV_CHUNK_HEADER Header;
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uint32_t Format;
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};
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struct WAV_FMT_CHUNK {
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WAV_CHUNK_HEADER Header;
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WAV_FORMAT AudioFormat;
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uint16_t NumChannels;
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uint32_t SampleRate;
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uint32_t ByteRate;
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uint16_t BlockAlign;
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uint16_t BitsPerSample;
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};
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struct WAV_FILE_HEADER {
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WAV_RIFF_CHUNK Riff;
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WAV_FMT_CHUNK Fmt;
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WAV_CHUNK_HEADER PcmData;
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};
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#pragma pack(pop)
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struct WAV_FILE
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{
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WAV_FILE_HEADER FileHeader;
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uint32_t PcmDataOffset;
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uint32_t BytesPerFrame;
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PCM_FORMAT PcmFormat;
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uint16_t ExtraParamSize; // unused
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uint32_t Samples; // unused
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uint32_t ChannelMask; // unused
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cocos2d::PXFileStream Stream;
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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 AudioDecoderWav : public AudioDecoder
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{
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public:
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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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virtual 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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virtual 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| * _bytesPerFrame.
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* @return The number of frames actually read, it's probably less than 'framesToRead'. Returns 0 means reach the end of file.
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*/
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virtual uint32_t read(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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virtual bool seek(uint32_t frameOffset) override;
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/**
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* @brief Tells the current frame offset.
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* @return The current frame offset.
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*/
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virtual uint32_t tell() const override;
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protected:
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AudioDecoderWav();
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~AudioDecoderWav();
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mutable WAV_FILE _wavf;
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friend class AudioDecoderManager;
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};
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} // namespace cocos2d {
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