67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
#pragma once
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#include "foundation/types.h"
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#include "MPEGHeader.h"
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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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struct LAMEInfo
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{
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LAMEInfo();
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uint64_t GetSeekPoint(double percent) const; /* 0 <= percent <= 1.0 */
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int Read(const MPEGHeader &frame, const uint8_t *buffer, size_t bufferlen);
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double GetLengthSeconds() const;
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uint64_t GetSamples() const;
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uint32_t GetFrames() const;
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bool Flag(int flag) const;
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int GetGaps(size_t *pregap, size_t *postgap);
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protected:
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int version;
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int sample_rate;
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int samples_per_frame;
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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 flags; // from Xing header data
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uint32_t frames; // total bit stream frames from Xing header data
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uint64_t 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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uint8_t toc[100]; // 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 encoder[32]; // 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 encoder_delay;
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unsigned short padding;
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uint8_t encoding_method;
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uint8_t tag_revision;
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uint8_t abr_bitrate;
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uint32_t music_length;
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uint16_t music_crc;
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uint16_t tag_crc;
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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(const MPEGHeader &frame, const uint8_t *buffer, LAMEInfo *lameInfo);
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