/*
 * $Id: tta_file.h 1648 2012-12-02 21:31:55Z exodus8 $
 *
 * Adaptation for MPC-BE (C) 2012 Sergey "Exodus8" (rusguy6@gmail.com)
 *
 * This file is part of MPC-BE.
 *
 * MPC-BE is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * MPC-BE is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#pragma once

#include "../../../DSUtil/DSUtil.h"

#define TTA_COPYRIGHT		""
#define TTA_MYNAME		""
#define TTA_VERSION		"3.0"
#define TTA_BUILD		""

#define TTA_MAX_BPS		32
#define TTA_FRAME_TIME		1.04489795918367346939
#define TTA1_SIGN		0x31415454
#define TTA_MAX_ORDER		16

#ifdef _WIN32
#define __ATTRIBUTE_PACKED__
typedef unsigned __int64 uint64;
#else
#define __ATTRIBUTE_PACKED__	__attribute__((packed))
typedef unsigned long long uint64;
#endif

#ifdef _WIN32

#define tta_alloc(__length) GlobalAlloc(GMEM_ZEROINIT, __length)

typedef unsigned __int64 uint64;

#else

#define WAVE_FORMAT_PCM	1
#define WAVE_FORMAT_IEEE_FLOAT 3

typedef unsigned long long uint64;

#endif

typedef struct {
	unsigned long k0;
	unsigned long k1;
	unsigned long sum0;
	unsigned long sum1;
} TTA_adapt;

typedef struct {
	long shift;
	long round;
	long error;
	long mutex;
	long qm[TTA_MAX_ORDER];
	long dx[TTA_MAX_ORDER];
	long dl[TTA_MAX_ORDER];
} TTA_fltst;

typedef struct {
	TTA_fltst fst;
	TTA_adapt rice;
	long last;
} TTA_channel_codec;

typedef struct {
	unsigned long bit_count;
	unsigned long bit_cache;
	unsigned char *bitpos;
	unsigned long crc32;
	unsigned long size;
	
	unsigned char *bit_buffer;
	unsigned char *BIT_BUFFER_END;
} TTA_bit_buffer;

typedef struct {
	TTA_channel_codec* enc;
	TTA_channel_codec* tta;
	TTA_bit_buffer *fbuf;
	long* data;
	unsigned long data_len;

	unsigned long framelen;
	unsigned long srate;
	unsigned short num_chan;
	unsigned short bps;
	unsigned long byte_size;
	unsigned long is_float;
	unsigned short wavformat;
	unsigned short codec_num_chan;
} TTA_codec;

#ifdef _WIN32
#pragma pack(push,1)
#endif

typedef struct {
	unsigned long	TTAid;
	unsigned short	AudioFormat;
	unsigned short	NumChannels;
	unsigned short	BitsPerSample;
	unsigned long	SampleRate;
	unsigned long	DataLength;
	unsigned long	CRC32;
} __ATTRIBUTE_PACKED__ TTA_header;

typedef struct {
	unsigned char id[3];
	unsigned short version;
	unsigned char flags;
	unsigned char size[4];
} __ATTRIBUTE_PACKED__ TTA_id3v2_header;

typedef struct _tag_TTA_io_callback {
	int (*read)(struct _tag_TTA_io_callback *io, void* buff, int size);
	int (*seek)(struct _tag_TTA_io_callback *io, int offset, int origin);
} __ATTRIBUTE_PACKED__ TTA_io_callback;

typedef struct {
	TTA_io_callback*	io;
	TTA_id3v2_header	id3v2;
	TTA_header		TTAHeader;
	unsigned long	ID3v2Len;

	unsigned long	FrameTotal;
	unsigned long	FrameLen;
	unsigned long	LastFrameLen;
	unsigned long	DataOffset;

	unsigned long*	SeekTable;
	unsigned long*	SeekOffsetTable;

	unsigned long	FrameIndex;
	unsigned long	MaxFrameLenBytes;

	unsigned long	extradata_size;
	BYTE			extradata[65535];
} __ATTRIBUTE_PACKED__ TTA_parser;

#ifdef _WIN32
#pragma pack(pop)
#endif

#ifdef __cplusplus
extern "C" {
#endif

TTA_codec* tta_codec_encoder_new(long srate, short num_chan, short bps, short format);

TTA_codec* tta_codec_decoder_new(long srate, short num_chan, short bps);

void tta_codec_free(TTA_codec* ttaenc);

unsigned long tta_codec_encoder_compress(TTA_codec* ttaenc, unsigned char *src, unsigned long len, unsigned long *bytes_to_write);

unsigned char* tta_codec_encoder_get_frame(TTA_codec* ttaenc, unsigned long *num_frames);

unsigned long tta_codec_encoder_finalize(TTA_codec* ttaenc);

unsigned long tta_codec_decoder_decompress(TTA_codec* ttadec, unsigned char *src, unsigned long len, unsigned char *dst, unsigned long dstlen);

void tta_codec_fill_header(TTA_codec* ttacodec, TTA_header *hdr, unsigned long data_len);

unsigned long tta_codec_get_frame_len(long srate);

TTA_parser* tta_parser_new(TTA_io_callback* io);

unsigned long tta_parser_read_frame(TTA_parser* ttaparser, unsigned char* dst, unsigned long* FrameIndex, unsigned long* FrameLen);

void tta_parser_seek(TTA_parser* ttaparser, uint64 seek_pos_100ns);

int tta_parser_eof(TTA_parser* ttaparser);

void tta_parser_free(TTA_parser** ttaparser);

#ifdef __cplusplus
}
#endif	

static long flt_set [4][2] = {
	{10,1}, {9,1}, {10,1}, {12,0}
};

__inline void memshl (register long *pA, register long *pB)
{
	*pA++ = *pB++;
	*pA++ = *pB++;
	*pA++ = *pB++;
	*pA++ = *pB++;
	*pA++ = *pB++;
	*pA++ = *pB++;
	*pA++ = *pB++;
	*pA   = *pB;
}

__inline void hybrid_filter (TTA_fltst *fs, long *in, long mode)
{
	register long *pA = fs->dl;
	register long *pB = fs->qm;
	register long *pM = fs->dx;
	register long sum = fs->round;

	if (!fs->error) {
		sum += *pA++ * *pB, pB++;
		sum += *pA++ * *pB, pB++;
		sum += *pA++ * *pB, pB++;
		sum += *pA++ * *pB, pB++;
		sum += *pA++ * *pB, pB++;
		sum += *pA++ * *pB, pB++;
		sum += *pA++ * *pB, pB++;
		sum += *pA++ * *pB, pB++; pM += 8;
	} else if (fs->error < 0) {
		sum += *pA++ * (*pB -= *pM++), pB++;
		sum += *pA++ * (*pB -= *pM++), pB++;
		sum += *pA++ * (*pB -= *pM++), pB++;
		sum += *pA++ * (*pB -= *pM++), pB++;
		sum += *pA++ * (*pB -= *pM++), pB++;
		sum += *pA++ * (*pB -= *pM++), pB++;
		sum += *pA++ * (*pB -= *pM++), pB++;
		sum += *pA++ * (*pB -= *pM++), pB++;
	} else {
		sum += *pA++ * (*pB += *pM++), pB++;
		sum += *pA++ * (*pB += *pM++), pB++;
		sum += *pA++ * (*pB += *pM++), pB++;
		sum += *pA++ * (*pB += *pM++), pB++;
		sum += *pA++ * (*pB += *pM++), pB++;
		sum += *pA++ * (*pB += *pM++), pB++;
		sum += *pA++ * (*pB += *pM++), pB++;
		sum += *pA++ * (*pB += *pM++), pB++;
	}

	*(pM-0) = ((*(pA-1) >> 30) | 1) << 2;
	*(pM-1) = ((*(pA-2) >> 30) | 1) << 1;
	*(pM-2) = ((*(pA-3) >> 30) | 1) << 1;
	*(pM-3) = ((*(pA-4) >> 30) | 1);

	if (mode) {
		*pA = *in;
		*in -= (sum >> fs->shift);
		fs->error = *in;
	} else {
		fs->error = *in;
		*in += (sum >> fs->shift);
		*pA = *in;
	}

	if (fs->mutex) {
		*(pA-1) = *(pA-0) - *(pA-1);
		*(pA-2) = *(pA-1) - *(pA-2);
		*(pA-3) = *(pA-2) - *(pA-3);
	}

	memshl (fs->dl, fs->dl + 1);
	memshl (fs->dx, fs->dx + 1);
}

__inline void filter_init (TTA_fltst *fs, long shift, long mode)
{
	ZeroMemory(fs, sizeof(TTA_fltst));
	fs->shift = shift;
	fs->round = 1 << (shift - 1);
	fs->mutex = mode;
}

const unsigned long crc32_table[256] = {
	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
	0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
	0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
	0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
	0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
	0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
	0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
	0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
	0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
	0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
	0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
	0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
	0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
	0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
	0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
	0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
	0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
	0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
	0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
	0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
	0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
	0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
	0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
	0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
	0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
	0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
	0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
	0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
	0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
	0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
	0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
	0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
	0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
	0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
	0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
	0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
	0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
	0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
	0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
	0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
	0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
	0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
	0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
	0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
	0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
	0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
	0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
	0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
	0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
	0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
	0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
	0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
	0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
	0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
	0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
	0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
	0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
	0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
	0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
	0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
	0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
}; 

#define UPDATE_CRC32(x, crc) crc = \
	(((crc>>8) & 0x00FFFFFF) ^ crc32_table[(crc^x) & 0xFF])

static unsigned long crc32 (unsigned char *buffer, unsigned long len)
{
	unsigned long	i;
	unsigned long	crc = 0xFFFFFFFF;

	for (i = 0; i < len; i++) UPDATE_CRC32(buffer[i], crc);

	return (crc ^ 0xFFFFFFFF);
}
