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