/*
 * libtta.h
 *
 * Description: TTA1-C library interface
 * Copyright (c) 1999-2015 Aleksander Djuric. All rights reserved.
 * Distributed under the GNU Lesser General Public License (LGPL).
 * The complete text of the license can be found in the COPYING
 * file included in the distribution.
 *
 */

#ifndef _LIBTTA_H
#define _LIBTTA_H

#ifdef __GNUC__
#include <stdint.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef CARIBBEAN
#define ALLOW_OS_CODE 1

#include "../../../rmdef/rmdef.h"
#include "../../../rmlibcw/include/rmlibcw.h"
#include "../../../rmcore/include/rmcore.h"
#endif
#else // MSVC
#include <windows.h>
#endif
#include <setjmp.h>

#define MAX_DEPTH 3
#define MAX_BPS (MAX_DEPTH*8)
#define MIN_BPS 16
#define MAX_NCH 6
#define TTA_FIFO_BUFFER_SIZE 5120

#ifdef __GNUC__
#define CALLBACK
#define TTA_EXTERN_API __attribute__((visibility("default")))
#define TTA_ALIGNED(n) __attribute__((aligned(n), packed))
#define __forceinline static __inline
#else // MSVC
#define CALLBACK __stdcall
#define TTA_EXTERN_API __declspec(dllexport)
#define TTA_ALIGNED(n) __declspec(align(n))
#endif

// portability definitions
#ifdef __GNUC__
#ifdef CARIBBEAN
typedef RMint8 (TTAint8);
typedef RMint16 (TTAint16);
typedef RMint32 (TTAint32);
typedef RMint64 (TTAint64);
typedef RMuint8 (TTAuint8);
typedef RMuint16 (TTAuint16);
typedef RMuint32 (TTAuint32);
typedef RMuint64 (TTAuint64);
#else // GNUC
typedef int8_t (TTAint8);
typedef int16_t (TTAint16);
typedef int32_t (TTAint32);
typedef int64_t (TTAint64);
typedef uint8_t (TTAuint8);
typedef uint16_t (TTAuint16);
typedef uint32_t (TTAuint32);
typedef uint64_t (TTAuint64);
#endif
#else // MSVC
typedef __int8 (TTAint8);
typedef __int16 (TTAint16);
typedef __int32 (TTAint32);
typedef __int64 (TTAint64);
typedef unsigned __int8 (TTAuint8);
typedef unsigned __int16 (TTAuint16);
typedef unsigned __int32 (TTAuint32);
typedef unsigned __int64 (TTAuint64);
#endif

// boolean
#ifndef bool
typedef int (bool);
#define false (0)
#define true (1)
#endif

typedef enum {
	TTA_SUCCESS,	// setjmp data saved
	TTA_NO_ERROR,	// no known errors found
	TTA_OPEN_ERROR,	// can't open file
	TTA_FORMAT_ERROR,	// not compatible file format
	TTA_FILE_ERROR,	// file is corrupted
	TTA_READ_ERROR,	// can't read from input file
	TTA_WRITE_ERROR,	// can't write to output file
	TTA_SEEK_ERROR,	// file seek error
	TTA_MEMORY_ERROR,	// insufficient memory available
	TTA_PASSWORD_ERROR,	// password protected file
	TTA_NOT_SUPPORTED	// unsupported architecture
} TTA_CODEC_STATUS;

typedef enum {
	CPU_ARCH_UNDEFINED,
	CPU_ARCH_IX86_SSE2,
	CPU_ARCH_IX86_SSE3,
	CPU_ARCH_IX86_SSE4_1,
	CPU_ARCH_IX86_SSE4_2
} CPU_ARCH_TYPE;

// TTA audio format
#define TTA_FORMAT_SIMPLE 1
#define TTA_FORMAT_ENCRYPTED 2

typedef struct {
	TTAuint32 format;	// audio format
	TTAuint32 nch;	// number of channels
	TTAuint32 bps;	// bits per sample
	TTAuint32 sps;	// samplerate (sps)
	TTAuint32 samples;	// data length in samples
} TTA_ALIGNED(16) TTA_info;

typedef struct {
	TTAuint32 k0;
	TTAuint32 k1;
	TTAuint32 sum0;
	TTAuint32 sum1;
} TTA_ALIGNED(16) TTA_adapt;

typedef struct {
        TTAint32 index;
        TTAint32 error;
        TTAint32 round;
        TTAint32 shift;
        TTAint32 qm[8];
        TTAint32 dx[24];
        TTAint32 dl[24];
} TTA_ALIGNED(16) TTA_fltst;

typedef struct {
	TTA_fltst fst;
	TTA_adapt rice;
	TTAint32 prev;
} TTA_ALIGNED(16) TTA_codec;

typedef struct _tag_TTA_io_callback {
	TTAint32(CALLBACK *read)(struct _tag_TTA_io_callback *, TTAuint8 *, TTAuint32);
	TTAint32(CALLBACK *write)(struct _tag_TTA_io_callback *, TTAuint8 *, TTAuint32);
	TTAint64(CALLBACK *seek)(struct _tag_TTA_io_callback *, TTAint64 offset);
} TTA_ALIGNED(16) TTA_io_callback;

// progress callback
typedef void (CALLBACK *TTA_CALLBACK)(TTAuint32, TTAuint32, TTAuint32);

// architecture type compatibility
CPU_ARCH_TYPE tta_binary_version();

/////////////////////// TTA decoder functions /////////////////////////
void tta_decoder_new(TTA_io_callback *iocb);
void tta_decoder_done();

int tta_decoder_init_get_info(TTA_info *info);
int tta_decoder_init_set_info(TTA_info *info);
void tta_decoder_set_password(void const *pstr, TTAuint32 len);
int tta_decoder_frame_reset(TTAuint32 frame, TTA_io_callback *iocb);
int tta_decoder_process_stream(TTAuint8 *output, TTAuint32 out_bytes, TTA_CALLBACK tta_callback);
int tta_decoder_process_frame(TTAuint32 in_bytes, TTAuint8 *output, TTAuint32 out_bytes);
int tta_decoder_set_position(TTAuint32 seconds, TTAuint32 *new_pos);

TTAuint32 tta_decoder_get_rate();
TTA_CODEC_STATUS tta_decoder_get_error();

/////////////////////// TTA encoder functions /////////////////////////
void tta_encoder_new(TTA_io_callback *iocb);
void tta_encoder_done();

int tta_encoder_init_set_info(TTA_info *info, TTAuint32 offset);
void tta_encoder_set_password(void const *pstr, TTAuint32 len);
void tta_encoder_frame_reset(TTAuint32 frame, TTA_io_callback *iocb);
int tta_encoder_process_stream(TTAuint8 *input, TTAuint32 in_bytes, TTA_CALLBACK tta_callback);
int tta_encoder_process_frame(TTAuint8 *input, TTAuint32 in_bytes);
int tta_encoder_finalize();

TTAuint32 tta_encoder_get_rate();
TTA_CODEC_STATUS tta_encoder_get_error();

#endif // _LIBTTA_H