Initial community commit

Src/replicant/nsmp3/LAMEInfo.h

@@ -0,0 +1,66 @@
+#pragma once
+#include "foundation/types.h"
+#include "MPEGHeader.h"
+#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)
+
+struct LAMEInfo
+{
+	LAMEInfo();
+	uint64_t GetSeekPoint(double percent) const; /* 0 <= percent <= 1.0 */
+	int Read(const MPEGHeader &frame, const uint8_t *buffer, size_t bufferlen);
+	double GetLengthSeconds() const;
+	uint64_t GetSamples() const;
+	uint32_t GetFrames() const;
+
+	bool Flag(int flag) const;
+	int GetGaps(size_t *pregap, size_t *postgap);
+protected:
+	int version;
+	int sample_rate;
+	int samples_per_frame;
+
+	int cbr; // set to 1 if the file is actually just CBR
+	// Xing
+	int flags;        // from Xing header data
+	uint32_t frames;  // total bit stream frames from Xing header data
+	uint64_t bytes;   // total bit stream bytes from Xing header data
+	int vbr_scale;    // encoded vbr scale from Xing header data
+	uint8_t toc[100]; // pointer to unsigned char toc_buffer[100]
+	// may be NULL if toc not desired
+
+	// LAME
+	char encoder[32]; // 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 encoder_delay;
+	unsigned short padding;
+	uint8_t encoding_method;
+	uint8_t tag_revision;
+	uint8_t abr_bitrate;
+	uint32_t music_length;
+	uint16_t music_crc;
+	uint16_t tag_crc;
+};
+
+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(const MPEGHeader &frame, const uint8_t *buffer, LAMEInfo *lameInfo);
+