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