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/**
* RFX codec
*
* Copyright 2014-2017 Jay Sorg <jay.sorg@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __RFXCOMMON_H
#define __RFXCOMMON_H
#define MIN(_val1, _val2) (_val1) < (_val2) ? (_val1) : (_val2)
#define MAX(_val1, _val2) (_val1) > (_val2) ? (_val1) : (_val2)
#define MINMAX(_v, _l, _h) ((_v) < (_l) ? (_l) : ((_v) > (_h) ? (_h) : (_v)))
#define DWT_FACTOR 5
typedef signed char sint8;
typedef unsigned char uint8;
typedef signed short sint16;
typedef unsigned short uint16;
typedef signed int sint32;
typedef unsigned int uint32;
struct _STREAM
{
uint8 *data;
uint8 *p;
int size;
};
typedef struct _STREAM STREAM;
#if defined(__x86__) || defined(__x86_64__) || \
defined(__AMD64__) || defined(_M_IX86) || defined (_M_AMD64) || \
defined(__i386__)
#define stream_read_uint8(_s, _v) do { _v = ((uint8 *) ((_s)->p))[0]; (_s)->p += 1; } while (0)
#define stream_read_uint16(_s, _v) do { _v = ((uint16 *) ((_s)->p))[0]; (_s)->p += 2; } while (0)
#define stream_read_uint32(_s, _v) do { _v = ((uint32 *) ((_s)->p))[0]; (_s)->p += 4; } while (0)
#define stream_write_uint8(_s, _v) do { ((uint8 *) ((_s)->p))[0] = _v; (_s)->p += 1; } while (0)
#define stream_write_uint16(_s, _v) do { ((uint16 *) ((_s)->p))[0] = _v; (_s)->p += 2; } while (0)
#define stream_write_uint32(_s, _v) do { ((uint32 *) ((_s)->p))[0] = _v; (_s)->p += 4; } while (0)
#else
#define stream_read_uint8(_s, _v) do { \
_v = ((uint8 *) ((_s)->p))[0]; \
(_s)->p += 1; \
} while (0)
#define stream_read_uint16(_s, _v) do { \
_v = (((uint8 *) ((_s)->p))[0]) | \
((((uint8 *) ((_s)->p))[1]) << 8); \
(_s)->p += 2; \
} while (0)
#define stream_read_uint32(_s, _v) do { \
_v = (((uint8 *) ((_s)->p))[0]) | \
((((uint8 *) ((_s)->p))[1]) << 8) | \
((((uint8 *) ((_s)->p))[2]) << 16) | \
((((uint8 *) ((_s)->p))[3]) << 24); \
(_s)->p += 4; \
} while (0)
#define stream_write_uint8(_s, _v) do { \
((uint8 *) ((_s)->p))[0] = _v; \
(_s)->p += 1; \
} while (0)
#define stream_write_uint16(_s, _v) do { \
((uint8 *) ((_s)->p))[0] = (uint8) (_v); \
((uint8 *) ((_s)->p))[1] = (uint8) ((_v) >> 8); \
(_s)->p += 2; \
} while (0)
#define stream_write_uint32(_s, _v) do { \
((uint8 *) ((_s)->p))[0] = (uint8) (_v); \
((uint8 *) ((_s)->p))[1] = (uint8) ((_v) >> 8); \
((uint8 *) ((_s)->p))[2] = (uint8) ((_v) >> 16); \
((uint8 *) ((_s)->p))[3] = (uint8) ((_v) >> 24); \
(_s)->p += 4; \
} while (0)
#endif
#define stream_seek(_s, _n) (_s)->p += _n
#define stream_seek_uint8(_s) (_s)->p += 1
#define stream_seek_uint16(_s) (_s)->p += 2
#define stream_seek_uint32(_s) (_s)->p += 4
#define stream_get_pos(_s) ((int) ((_s)->p - (_s)->data))
#define stream_get_tail(_s) (_s)->p
#define stream_get_left(_s) ((_s)->size - ((_s)->p - (_s)->data))
#define stream_set_pos(_s, _m) (_s)->p = (_s)->data + (_m)
#define xnew(_type) (_type *) calloc(1, sizeof(_type))
/*
GCC has __builtin_clz that translates to BSR on x86/x64, CLZ on ARM, etc.
and emulates the instruction if the hardware does not implement it.
Visual C++ 2005 and up has _BitScanReverse
LZCNT = BSR ^ 31
*/
#if defined(__GNUC__)
#define GBSR(_in, _r) do { \
_r = __builtin_clz(_in) ^ 31; \
} while (0)
#elif defined(_MSC_VER) && (_MSC_VER > 1000)
#define GBSR(_in, _r) do { \
unsigned long rv = 0; \
_BitScanReverse(&rv, _in); \
_r = rv; \
} while (0)
#else
#define GBSR(_in, _r) do { \
int rv = -1; \
int x = _in; \
while (x != 0) \
{ \
rv++; \
x = x >> 1; \
} \
_r = rv; \
} while (0)
#endif
#endif
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