mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-15 21:06:32 +00:00
144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
/*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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_ */
|