| /* |
| * ttadec.h |
| * |
| * Description: TTAv1 decoder definitions and prototypes |
| * Developed by: Alexander Djourik <sasha@iszf.irk.ru> |
| * Pavel Zhilin <pzh@iszf.irk.ru> |
| * |
| * Copyright (c) 1999-2004 Alexander Djourik. All rights reserved. |
| * |
| */ |
| |
| /* |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| * Please see the file COPYING in this directory for full copyright |
| * information. |
| */ |
| |
| #ifndef TTADEC_H_ |
| #define TTADEC_H_ |
| |
| #ifdef _WIN32 |
| #pragma pack(1) |
| #define __ATTRIBUTE_PACKED__ |
| #else |
| #define __ATTRIBUTE_PACKED__ __attribute__((packed)) |
| #endif |
| |
| #define TTA1_SIGN 0x31415454 |
| #define FRAME_TIME 1.04489795918367346939 |
| #define MAX_ORDER 8 |
| |
| #ifndef WAVE_FORMAT_PCM |
| #define WAVE_FORMAT_PCM 1 |
| #endif |
| |
| #ifdef _WIN32 |
| typedef unsigned __int64 uint64; |
| #else |
| typedef unsigned long long uint64; |
| #endif |
| |
| /** |
| * moved to gstttadec.c to silence gcc warnings |
| */ |
| /* |
| static const unsigned long bit_mask[] = { |
| 0x00000000, 0x00000001, 0x00000003, 0x00000007, |
| 0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f, |
| 0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff, |
| 0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff, |
| 0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff, |
| 0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff, |
| 0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff, |
| 0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff, |
| 0xffffffff |
| }; |
| |
| static const unsigned long bit_shift[] = { |
| 0x00000001, 0x00000002, 0x00000004, 0x00000008, |
| 0x00000010, 0x00000020, 0x00000040, 0x00000080, |
| 0x00000100, 0x00000200, 0x00000400, 0x00000800, |
| 0x00001000, 0x00002000, 0x00004000, 0x00008000, |
| 0x00010000, 0x00020000, 0x00040000, 0x00080000, |
| 0x00100000, 0x00200000, 0x00400000, 0x00800000, |
| 0x01000000, 0x02000000, 0x04000000, 0x08000000, |
| 0x10000000, 0x20000000, 0x40000000, 0x80000000, |
| 0x80000000, 0x80000000, 0x80000000, 0x80000000, |
| 0x80000000, 0x80000000, 0x80000000, 0x80000000 |
| }; |
| |
| static const unsigned long *shift_16 = bit_shift + 4; |
| */ |
| |
| typedef unsigned char byte; |
| |
| #ifdef _BIG_ENDIAN |
| #define ENDSWAP_INT16(x) (((((x)>>8)&0xFF)|(((x)&0xFF)<<8))) |
| #define ENDSWAP_INT32(x) (((((x)>>24)&0xFF)|(((x)>>8)&0xFF00)|(((x)&0xFF00)<<8)|(((x)&0xFF)<<24))) |
| #define WRITE_BUFFER(x, bsize, out) { \ |
| if (bsize > 2) *out++ = (byte)(*x >> 16); \ |
| if (bsize > 1) *out++ = (byte)(*x >> 8); \ |
| *out++ = (byte) *x; } |
| #else |
| #define ENDSWAP_INT16(x) (x) |
| #define ENDSWAP_INT32(x) (x) |
| #define WRITE_BUFFER(x, bsize, out) { \ |
| *out++ = (byte) *x; \ |
| if (bsize > 1) *out++ = (byte)(*x >> 8); \ |
| if (bsize > 2) *out++ = (byte)(*x >> 16); } |
| #endif |
| |
| #define PREDICTOR1(x, k) ((long)((((uint64)x << k) - x) >> k)) |
| #define DEC(x) (((x)&1)?(++(x)>>1):(-(x)>>1)) |
| |
| #if 0 |
| /* This doesn't compile on non-gcc compilers */ |
| 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_hdr; |
| #endif |
| |
| typedef struct { |
| unsigned long k0; |
| unsigned long k1; |
| unsigned long sum0; |
| unsigned long sum1; |
| } adapt; |
| |
| typedef struct { |
| long shift; |
| long round; |
| long error; |
| long mutex; |
| long qm[MAX_ORDER+1]; |
| long dx[MAX_ORDER+1]; |
| long dl[MAX_ORDER+1]; |
| } fltst; |
| |
| typedef struct { |
| fltst fst; |
| adapt rice; |
| long last; |
| } decoder; |
| |
| #endif /* TTADEC_H_ */ |