118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
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#ifndef NULLSOFT_LAMEINFOH
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#define NULLSOFT_LAMEINFOH
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#define FRAMES_FLAG 0x0001
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#define BYTES_FLAG 0x0002
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#define TOC_FLAG 0x0004
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#define VBR_SCALE_FLAG 0x0008
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#define FRAMES_AND_BYTES (FRAMES_FLAG | BYTES_FLAG)
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#include <memory.h>
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#pragma intrinsic(memset)
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struct LAMEinfo
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{
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LAMEinfo()
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{
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memset(this, 0, sizeof(LAMEinfo));
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}
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int cbr; // set to 1 if the file is actually just CBR
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// Xing
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int h_id;
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int samprate; // determined from MPEG header
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int flags; // from Xing header data
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int frames; // total bit stream frames from Xing header data
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int bytes; // total bit stream bytes from Xing header data
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int vbr_scale; // encoded vbr scale from Xing header data
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unsigned char *toc; // pointer to unsigned char toc_buffer[100]
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// may be NULL if toc not desired
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// LAME
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char lameTag[10]; // 9 characters, but we'll add an extra NULL just in case
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float peak;
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float replaygain_album_gain;
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float replaygain_track_gain;
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unsigned short lowpass;
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unsigned short encoderDelay;
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unsigned short padding;
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int encodingMethod;
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};
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enum
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{
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ENCODING_METHOD_LAME = 0,
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ENCODING_METHOD_CBR = 1,
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ENCODING_METHOD_ABR = 2,
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ENCODING_METHOD_VBR1 = 3,
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ENCODING_METHOD_VBR2 = 4,
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ENCODING_METHOD_VBR3 = 5,
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ENCODING_METHOD_VBR4 = 6,
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ENCODING_METHOD_CBR_2PASS = 8,
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ENCODING_METHOD_ABR_2PASS = 9,
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};
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int ReadLAMEinfo(unsigned char *buffer, LAMEinfo *lameInfo);
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class MPEGFrame
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{
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public:
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int GetNumChannels();
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void ReadBuffer(const unsigned char *buffer);
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bool IsSync();
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int GetBitrate();
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int GetPadding();
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int HeaderSize();
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int GetSampleRate() const;
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int FrameSize();
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const char *GetMPEGVersionString();
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const char *GetChannelModeString();
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const char *GetEmphasisString();
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int GetLayer();
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bool IsCRC();
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bool IsCopyright();
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bool IsOriginal();
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int MPEGFrame::GetSamplesPerFrame() const;
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enum
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{
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NotPadded=0,
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Padded=1,
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CRC = 0,
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NoProtection = 1,
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Stereo = 0,
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JointStereo = 1,
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DualChannel = 2,
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Mono = 3,
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MPEG1 = 3,
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MPEG2 = 2,
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MPEG_Error = 1,
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MPEG2_5 = 0,
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Layer1 = 3,
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Layer2 = 2,
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Layer3 = 1,
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LayerError = 0,
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Emphasis_None = 0,
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Emphasis_50_15_ms = 1,
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Emphasis_reserved = 2,
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Emphasis_CCIT_J_17 = 3,
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};
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unsigned int sync:11,
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mpegVersion:2,
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layer:2,
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protection:1,
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bitrateIndex:4,
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paddingBit:1,
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privateBit:1,
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channelMode:2,
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modeExtension:2,
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sampleRateIndex:2,
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copyright:1,
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original:1,
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emphasis:2;
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};
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#endif
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