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63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
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#if !defined(MP3HEADER_HPP)
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#define MP3HEADER_HPP
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#include <iosfwd>
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class Mp3Header
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{
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public:
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Mp3Header(unsigned long);
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unsigned long id;
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unsigned long layer;
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unsigned long protectionBit;
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unsigned long bitRateIndex;
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unsigned long samplingFrequency;
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unsigned long paddingBit;
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unsigned long privateBit;
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unsigned long mode;
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unsigned long modeExtension;
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unsigned long copyright;
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unsigned long originalOrCopy;
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unsigned long emphasis;
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unsigned long nch;
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unsigned long sampleRate;
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unsigned long bitRate;
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unsigned long frameSize;
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unsigned short outFrameSize;
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enum { BITRATE_FREE = 0 };
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enum { MPEG_FORBIDDEN = -1};
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enum { SAMPLING_FREQUENCY_RESERVED = -1};
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enum IdTypes
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{
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MPEG1 = 1,
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MPEG2 = 2
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};
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enum AudioMode
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{
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STEREO_MODE = 0,
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JOINT_STEREO_MODE = 1,
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DUAL_CHANNEL_MODE = 2,
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SINGLE_CHANNEL_MODE = 3
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};
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/* layer code, very bad design */
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enum AudioLayer
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{
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AUDIO_LAYER_1 = 3,
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AUDIO_LAYER_2 = 2,
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AUDIO_LAYER_3 = 1,
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AUDIO_LAYER_RESERVED = 0
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};
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friend std::ostream& operator<<(std::ostream& os, const Mp3Header& mp3);
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private:
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static const unsigned short samplingFrequencyTable[2][4];
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static const short m1BitRateTable[3][16];
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static const short m2BitRateTable[3][16];
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static const unsigned short outFrameSizes[2][4];
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};
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#endif
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