660 lines
25 KiB
C
660 lines
25 KiB
C
|
/********************************************************************
|
||
|
|
* *
|
||
|
|
* THIS FILE IS PART OF THE 'ZYWRLE' VNC CODEC SOURCE CODE. *
|
||
|
|
* *
|
||
|
|
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
|
||
|
|
* GOVERNED BY A FOLLOWING BSD-STYLE SOURCE LICENSE. *
|
||
|
|
* PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
|
||
|
|
* *
|
||
|
|
* THE 'ZYWRLE' VNC CODEC SOURCE CODE IS (C) COPYRIGHT 2006 *
|
||
|
|
* BY Hitachi Systems & Services, Ltd. *
|
||
|
|
* (Noriaki Yamazaki, Research & Developement Center) *
|
||
|
|
* *
|
||
|
|
* *
|
||
|
|
********************************************************************
|
||
|
|
Redistribution and use in source and binary forms, with or without
|
||
|
|
modification, are permitted provided that the following conditions
|
||
|
|
are met:
|
||
|
|
|
||
|
|
- Redistributions of source code must retain the above copyright
|
||
|
|
notice, this list of conditions and the following disclaimer.
|
||
|
|
|
||
|
|
- Redistributions in binary form must reproduce the above copyright
|
||
|
|
notice, this list of conditions and the following disclaimer in the
|
||
|
|
documentation and/or other materials provided with the distribution.
|
||
|
|
|
||
|
|
- Neither the name of the Hitachi Systems & Services, Ltd. nor
|
||
|
|
the names of its contributors may be used to endorse or promote
|
||
|
|
products derived from this software without specific prior written
|
||
|
|
permission.
|
||
|
|
|
||
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION
|
||
|
|
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
********************************************************************/
|
||
|
|
|
||
|
|
#ifndef VNC_ENCODING_ZYWRLE_H
|
||
|
|
#define VNC_ENCODING_ZYWRLE_H
|
||
|
|
|
||
|
|
/* Tables for Coefficients filtering. */
|
||
|
|
#ifndef ZYWRLE_QUANTIZE
|
||
|
|
/* Type A:lower bit omitting of EZW style. */
|
||
|
|
static const unsigned int zywrle_param[3][3]={
|
||
|
|
{0x0000F000, 0x00000000, 0x00000000},
|
||
|
|
{0x0000C000, 0x00F0F0F0, 0x00000000},
|
||
|
|
{0x0000C000, 0x00C0C0C0, 0x00F0F0F0},
|
||
|
|
/* {0x0000FF00, 0x00000000, 0x00000000},
|
||
|
|
{0x0000FF00, 0x00FFFFFF, 0x00000000},
|
||
|
|
{0x0000FF00, 0x00FFFFFF, 0x00FFFFFF}, */
|
||
|
|
};
|
||
|
|
#else
|
||
|
|
/* Type B:Non liner quantization filter. */
|
||
|
|
static const int8_t zywrle_conv[4][256]={
|
||
|
|
{ /* bi=5, bo=5 r=0.0:PSNR=24.849 */
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
},
|
||
|
|
{ /* bi=5, bo=5 r=2.0:PSNR=74.031 */
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 32,
|
||
|
|
32, 32, 32, 32, 32, 32, 32, 32,
|
||
|
|
32, 32, 32, 32, 32, 32, 32, 32,
|
||
|
|
48, 48, 48, 48, 48, 48, 48, 48,
|
||
|
|
48, 48, 48, 56, 56, 56, 56, 56,
|
||
|
|
56, 56, 56, 56, 64, 64, 64, 64,
|
||
|
|
64, 64, 64, 64, 72, 72, 72, 72,
|
||
|
|
72, 72, 72, 72, 80, 80, 80, 80,
|
||
|
|
80, 80, 88, 88, 88, 88, 88, 88,
|
||
|
|
88, 88, 88, 88, 88, 88, 96, 96,
|
||
|
|
96, 96, 96, 104, 104, 104, 104, 104,
|
||
|
|
104, 104, 104, 104, 104, 112, 112, 112,
|
||
|
|
112, 112, 112, 112, 112, 112, 120, 120,
|
||
|
|
120, 120, 120, 120, 120, 120, 120, 120,
|
||
|
|
0, -120, -120, -120, -120, -120, -120, -120,
|
||
|
|
-120, -120, -120, -112, -112, -112, -112, -112,
|
||
|
|
-112, -112, -112, -112, -104, -104, -104, -104,
|
||
|
|
-104, -104, -104, -104, -104, -104, -96, -96,
|
||
|
|
-96, -96, -96, -88, -88, -88, -88, -88,
|
||
|
|
-88, -88, -88, -88, -88, -88, -88, -80,
|
||
|
|
-80, -80, -80, -80, -80, -72, -72, -72,
|
||
|
|
-72, -72, -72, -72, -72, -64, -64, -64,
|
||
|
|
-64, -64, -64, -64, -64, -56, -56, -56,
|
||
|
|
-56, -56, -56, -56, -56, -56, -48, -48,
|
||
|
|
-48, -48, -48, -48, -48, -48, -48, -48,
|
||
|
|
-48, -32, -32, -32, -32, -32, -32, -32,
|
||
|
|
-32, -32, -32, -32, -32, -32, -32, -32,
|
||
|
|
-32, -32, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
},
|
||
|
|
{ /* bi=5, bo=4 r=2.0:PSNR=64.441 */
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
48, 48, 48, 48, 48, 48, 48, 48,
|
||
|
|
48, 48, 48, 48, 48, 48, 48, 48,
|
||
|
|
48, 48, 48, 48, 48, 48, 48, 48,
|
||
|
|
64, 64, 64, 64, 64, 64, 64, 64,
|
||
|
|
64, 64, 64, 64, 64, 64, 64, 64,
|
||
|
|
80, 80, 80, 80, 80, 80, 80, 80,
|
||
|
|
80, 80, 80, 80, 80, 88, 88, 88,
|
||
|
|
88, 88, 88, 88, 88, 88, 88, 88,
|
||
|
|
104, 104, 104, 104, 104, 104, 104, 104,
|
||
|
|
104, 104, 104, 112, 112, 112, 112, 112,
|
||
|
|
112, 112, 112, 112, 120, 120, 120, 120,
|
||
|
|
120, 120, 120, 120, 120, 120, 120, 120,
|
||
|
|
0, -120, -120, -120, -120, -120, -120, -120,
|
||
|
|
-120, -120, -120, -120, -120, -112, -112, -112,
|
||
|
|
-112, -112, -112, -112, -112, -112, -104, -104,
|
||
|
|
-104, -104, -104, -104, -104, -104, -104, -104,
|
||
|
|
-104, -88, -88, -88, -88, -88, -88, -88,
|
||
|
|
-88, -88, -88, -88, -80, -80, -80, -80,
|
||
|
|
-80, -80, -80, -80, -80, -80, -80, -80,
|
||
|
|
-80, -64, -64, -64, -64, -64, -64, -64,
|
||
|
|
-64, -64, -64, -64, -64, -64, -64, -64,
|
||
|
|
-64, -48, -48, -48, -48, -48, -48, -48,
|
||
|
|
-48, -48, -48, -48, -48, -48, -48, -48,
|
||
|
|
-48, -48, -48, -48, -48, -48, -48, -48,
|
||
|
|
-48, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
},
|
||
|
|
{ /* bi=5, bo=2 r=2.0:PSNR=43.175 */
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
88, 88, 88, 88, 88, 88, 88, 88,
|
||
|
|
88, 88, 88, 88, 88, 88, 88, 88,
|
||
|
|
88, 88, 88, 88, 88, 88, 88, 88,
|
||
|
|
88, 88, 88, 88, 88, 88, 88, 88,
|
||
|
|
88, 88, 88, 88, 88, 88, 88, 88,
|
||
|
|
88, 88, 88, 88, 88, 88, 88, 88,
|
||
|
|
88, 88, 88, 88, 88, 88, 88, 88,
|
||
|
|
88, 88, 88, 88, 88, 88, 88, 88,
|
||
|
|
0, -88, -88, -88, -88, -88, -88, -88,
|
||
|
|
-88, -88, -88, -88, -88, -88, -88, -88,
|
||
|
|
-88, -88, -88, -88, -88, -88, -88, -88,
|
||
|
|
-88, -88, -88, -88, -88, -88, -88, -88,
|
||
|
|
-88, -88, -88, -88, -88, -88, -88, -88,
|
||
|
|
-88, -88, -88, -88, -88, -88, -88, -88,
|
||
|
|
-88, -88, -88, -88, -88, -88, -88, -88,
|
||
|
|
-88, -88, -88, -88, -88, -88, -88, -88,
|
||
|
|
-88, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
static const int8_t *zywrle_param[3][3][3]={
|
||
|
|
{{zywrle_conv[0], zywrle_conv[2], zywrle_conv[0]},
|
||
|
|
{zywrle_conv[0], zywrle_conv[0], zywrle_conv[0]},
|
||
|
|
{zywrle_conv[0], zywrle_conv[0], zywrle_conv[0]}},
|
||
|
|
{{zywrle_conv[0], zywrle_conv[3], zywrle_conv[0]},
|
||
|
|
{zywrle_conv[1], zywrle_conv[1], zywrle_conv[1]},
|
||
|
|
{zywrle_conv[0], zywrle_conv[0], zywrle_conv[0]}},
|
||
|
|
{{zywrle_conv[0], zywrle_conv[3], zywrle_conv[0]},
|
||
|
|
{zywrle_conv[2], zywrle_conv[2], zywrle_conv[2]},
|
||
|
|
{zywrle_conv[1], zywrle_conv[1], zywrle_conv[1]}},
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Load/Save pixel stuffs. */
|
||
|
|
#define ZYWRLE_YMASK15 0xFFFFFFF8
|
||
|
|
#define ZYWRLE_UVMASK15 0xFFFFFFF8
|
||
|
|
#define ZYWRLE_LOAD_PIXEL15(src, r, g, b) \
|
||
|
|
do { \
|
||
|
|
r = (((uint8_t*)src)[S_1]<< 1)& 0xF8; \
|
||
|
|
g = (((uint8_t*)src)[S_1]<< 6) | (((uint8_t*)src)[S_0]>> 2); \
|
||
|
|
g &= 0xF8; \
|
||
|
|
b = (((uint8_t*)src)[S_0]<< 3)& 0xF8; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define ZYWRLE_SAVE_PIXEL15(dst, r, g, b) \
|
||
|
|
do { \
|
||
|
|
r &= 0xF8; \
|
||
|
|
g &= 0xF8; \
|
||
|
|
b &= 0xF8; \
|
||
|
|
((uint8_t*)dst)[S_1] = (uint8_t)((r >> 1)|(g >> 6)); \
|
||
|
|
((uint8_t*)dst)[S_0] = (uint8_t)(((b >> 3)|(g << 2))& 0xFF); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define ZYWRLE_YMASK16 0xFFFFFFFC
|
||
|
|
#define ZYWRLE_UVMASK16 0xFFFFFFF8
|
||
|
|
#define ZYWRLE_LOAD_PIXEL16(src, r, g, b) \
|
||
|
|
do { \
|
||
|
|
r = ((uint8_t*)src)[S_1] & 0xF8; \
|
||
|
|
g = (((uint8_t*)src)[S_1]<< 5) | (((uint8_t*)src)[S_0] >> 3); \
|
||
|
|
g &= 0xFC; \
|
||
|
|
b = (((uint8_t*)src)[S_0]<< 3) & 0xF8; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define ZYWRLE_SAVE_PIXEL16(dst, r, g,b) \
|
||
|
|
do { \
|
||
|
|
r &= 0xF8; \
|
||
|
|
g &= 0xFC; \
|
||
|
|
b &= 0xF8; \
|
||
|
|
((uint8_t*)dst)[S_1] = (uint8_t)(r | (g >> 5)); \
|
||
|
|
((uint8_t*)dst)[S_0] = (uint8_t)(((b >> 3)|(g << 3)) & 0xFF); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define ZYWRLE_YMASK32 0xFFFFFFFF
|
||
|
|
#define ZYWRLE_UVMASK32 0xFFFFFFFF
|
||
|
|
#define ZYWRLE_LOAD_PIXEL32(src, r, g, b) \
|
||
|
|
do { \
|
||
|
|
r = ((uint8_t*)src)[L_2]; \
|
||
|
|
g = ((uint8_t*)src)[L_1]; \
|
||
|
|
b = ((uint8_t*)src)[L_0]; \
|
||
|
|
} while (0)
|
||
|
|
#define ZYWRLE_SAVE_PIXEL32(dst, r, g, b) \
|
||
|
|
do { \
|
||
|
|
((uint8_t*)dst)[L_2] = (uint8_t)r; \
|
||
|
|
((uint8_t*)dst)[L_1] = (uint8_t)g; \
|
||
|
|
((uint8_t*)dst)[L_0] = (uint8_t)b; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
static inline void harr(int8_t *px0, int8_t *px1)
|
||
|
|
{
|
||
|
|
/* Piecewise-Linear Harr(PLHarr) */
|
||
|
|
int x0 = (int)*px0, x1 = (int)*px1;
|
||
|
|
int orgx0 = x0, orgx1 = x1;
|
||
|
|
|
||
|
|
if ((x0 ^ x1) & 0x80) {
|
||
|
|
/* differ sign */
|
||
|
|
x1 += x0;
|
||
|
|
if (((x1 ^ orgx1) & 0x80) == 0) {
|
||
|
|
/* |x1| > |x0| */
|
||
|
|
x0 -= x1; /* H = -B */
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* same sign */
|
||
|
|
x0 -= x1;
|
||
|
|
if (((x0 ^ orgx0) & 0x80) == 0) {
|
||
|
|
/* |x0| > |x1| */
|
||
|
|
x1 += x0; /* L = A */
|
||
|
|
}
|
||
|
|
}
|
||
|
|
*px0 = (int8_t)x1;
|
||
|
|
*px1 = (int8_t)x0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
1D-Wavelet transform.
|
||
|
|
|
||
|
|
In coefficients array, the famous 'pyramid' decomposition is well used.
|
||
|
|
|
||
|
|
1D Model:
|
||
|
|
|L0L0L0L0|L0L0L0L0|H0H0H0H0|H0H0H0H0| : level 0
|
||
|
|
|L1L1L1L1|H1H1H1H1|H0H0H0H0|H0H0H0H0| : level 1
|
||
|
|
|
||
|
|
But this method needs line buffer because H/L is different position from X0/X1.
|
||
|
|
So, I used 'interleave' decomposition instead of it.
|
||
|
|
|
||
|
|
1D Model:
|
||
|
|
|L0H0L0H0|L0H0L0H0|L0H0L0H0|L0H0L0H0| : level 0
|
||
|
|
|L1H0H1H0|L1H0H1H0|L1H0H1H0|L1H0H1H0| : level 1
|
||
|
|
|
||
|
|
In this method, H/L and X0/X1 is always same position.
|
||
|
|
This lead us to more speed and less memory.
|
||
|
|
Of cause, the result of both method is quite same
|
||
|
|
because it's only difference that coefficient position.
|
||
|
|
*/
|
||
|
|
static inline void wavelet_level(int *data, int size, int l, int skip_pixel)
|
||
|
|
{
|
||
|
|
int s, ofs;
|
||
|
|
int8_t *px0;
|
||
|
|
int8_t *end;
|
||
|
|
|
||
|
|
px0 = (int8_t*)data;
|
||
|
|
s = (8 << l) * skip_pixel;
|
||
|
|
end = px0 + (size >> (l + 1)) * s;
|
||
|
|
s -= 2;
|
||
|
|
ofs = (4 << l) * skip_pixel;
|
||
|
|
|
||
|
|
while (px0 < end) {
|
||
|
|
harr(px0, px0 + ofs);
|
||
|
|
px0++;
|
||
|
|
harr(px0, px0 + ofs);
|
||
|
|
px0++;
|
||
|
|
harr(px0, px0 + ofs);
|
||
|
|
px0 += s;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifndef ZYWRLE_QUANTIZE
|
||
|
|
/* Type A:lower bit omitting of EZW style. */
|
||
|
|
static inline void filter_wavelet_square(int *buf, int width, int height,
|
||
|
|
int level, int l)
|
||
|
|
{
|
||
|
|
int r, s;
|
||
|
|
int x, y;
|
||
|
|
int *h;
|
||
|
|
const unsigned int *m;
|
||
|
|
|
||
|
|
m = &(zywrle_param[level - 1][l]);
|
||
|
|
s = 2 << l;
|
||
|
|
|
||
|
|
for (r = 1; r < 4; r++) {
|
||
|
|
h = buf;
|
||
|
|
if (r & 0x01) {
|
||
|
|
h += s >> 1;
|
||
|
|
}
|
||
|
|
if (r & 0x02) {
|
||
|
|
h += (s >> 1) * width;
|
||
|
|
}
|
||
|
|
for (y = 0; y < height / s; y++) {
|
||
|
|
for (x = 0; x < width / s; x++) {
|
||
|
|
/*
|
||
|
|
these are same following code.
|
||
|
|
h[x] = h[x] / (~m[x]+1) * (~m[x]+1);
|
||
|
|
( round h[x] with m[x] bit )
|
||
|
|
'&' operator isn't 'round' but is 'floor'.
|
||
|
|
So, we must offset when h[x] is negative.
|
||
|
|
*/
|
||
|
|
if (((int8_t*)h)[0] & 0x80) {
|
||
|
|
((int8_t*)h)[0] += ~((int8_t*)m)[0];
|
||
|
|
}
|
||
|
|
if (((int8_t*)h)[1] & 0x80) {
|
||
|
|
((int8_t*)h)[1] += ~((int8_t*)m)[1];
|
||
|
|
}
|
||
|
|
if (((int8_t*)h)[2] & 0x80) {
|
||
|
|
((int8_t*)h)[2] += ~((int8_t*)m)[2];
|
||
|
|
}
|
||
|
|
*h &= *m;
|
||
|
|
h += s;
|
||
|
|
}
|
||
|
|
h += (s-1)*width;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
/*
|
||
|
|
Type B:Non liner quantization filter.
|
||
|
|
|
||
|
|
Coefficients have Gaussian curve and smaller value which is
|
||
|
|
large part of coefficients isn't more important than larger value.
|
||
|
|
So, I use filter of Non liner quantize/dequantize table.
|
||
|
|
In general, Non liner quantize formula is explained as following.
|
||
|
|
|
||
|
|
y=f(x) = sign(x)*round( ((abs(x)/(2^7))^ r )* 2^(bo-1) )*2^(8-bo)
|
||
|
|
x=f-1(y) = sign(y)*round( ((abs(y)/(2^7))^(1/r))* 2^(bi-1) )*2^(8-bi)
|
||
|
|
( r:power coefficient bi:effective MSB in input bo:effective MSB in output )
|
||
|
|
|
||
|
|
r < 1.0 : Smaller value is more important than larger value.
|
||
|
|
r > 1.0 : Larger value is more important than smaller value.
|
||
|
|
r = 1.0 : Liner quantization which is same with EZW style.
|
||
|
|
|
||
|
|
r = 0.75 is famous non liner quantization used in MP3 audio codec.
|
||
|
|
In contrast to audio data, larger value is important in wavelet coefficients.
|
||
|
|
So, I select r = 2.0 table( quantize is x^2, dequantize sqrt(x) ).
|
||
|
|
|
||
|
|
As compared with EZW style liner quantization, this filter tended to be
|
||
|
|
more sharp edge and be more compression rate but be more blocking noise and be
|
||
|
|
less quality. Especially, the surface of graphic objects has distinguishable
|
||
|
|
noise in middle quality mode.
|
||
|
|
|
||
|
|
We need only quantized-dequantized(filtered) value rather than quantized value
|
||
|
|
itself because all values are packed or palette-lized in later ZRLE section.
|
||
|
|
This lead us not to need to modify client decoder when we change
|
||
|
|
the filtering procedure in future.
|
||
|
|
Client only decodes coefficients given by encoder.
|
||
|
|
*/
|
||
|
|
static inline void filter_wavelet_square(int *buf, int width, int height,
|
||
|
|
int level, int l)
|
||
|
|
{
|
||
|
|
int r, s;
|
||
|
|
int x, y;
|
||
|
|
int *h;
|
||
|
|
const int8_t **m;
|
||
|
|
|
||
|
|
m = zywrle_param[level - 1][l];
|
||
|
|
s = 2 << l;
|
||
|
|
|
||
|
|
for (r = 1; r < 4; r++) {
|
||
|
|
h = buf;
|
||
|
|
if (r & 0x01) {
|
||
|
|
h += s >> 1;
|
||
|
|
}
|
||
|
|
if (r & 0x02) {
|
||
|
|
h += (s >> 1) * width;
|
||
|
|
}
|
||
|
|
for (y = 0; y < height / s; y++) {
|
||
|
|
for (x = 0; x < width / s; x++) {
|
||
|
|
((int8_t*)h)[0] = m[0][((uint8_t*)h)[0]];
|
||
|
|
((int8_t*)h)[1] = m[1][((uint8_t*)h)[1]];
|
||
|
|
((int8_t*)h)[2] = m[2][((uint8_t*)h)[2]];
|
||
|
|
h += s;
|
||
|
|
}
|
||
|
|
h += (s - 1) * width;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static inline void wavelet(int *buf, int width, int height, int level)
|
||
|
|
{
|
||
|
|
int l, s;
|
||
|
|
int *top;
|
||
|
|
int *end;
|
||
|
|
|
||
|
|
for (l = 0; l < level; l++) {
|
||
|
|
top = buf;
|
||
|
|
end = buf + height * width;
|
||
|
|
s = width << l;
|
||
|
|
while (top < end) {
|
||
|
|
wavelet_level(top, width, l, 1);
|
||
|
|
top += s;
|
||
|
|
}
|
||
|
|
top = buf;
|
||
|
|
end = buf + width;
|
||
|
|
s = 1<<l;
|
||
|
|
while (top < end) {
|
||
|
|
wavelet_level(top, height, l, width);
|
||
|
|
top += s;
|
||
|
|
}
|
||
|
|
filter_wavelet_square(buf, width, height, level, l);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* Load/Save coefficients stuffs.
|
||
|
|
Coefficients manages as 24 bits little-endian pixel. */
|
||
|
|
#define ZYWRLE_LOAD_COEFF(src, r, g, b) \
|
||
|
|
do { \
|
||
|
|
r = ((int8_t*)src)[2]; \
|
||
|
|
g = ((int8_t*)src)[1]; \
|
||
|
|
b = ((int8_t*)src)[0]; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define ZYWRLE_SAVE_COEFF(dst, r, g, b) \
|
||
|
|
do { \
|
||
|
|
((int8_t*)dst)[2] = (int8_t)r; \
|
||
|
|
((int8_t*)dst)[1] = (int8_t)g; \
|
||
|
|
((int8_t*)dst)[0] = (int8_t)b; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/*
|
||
|
|
RGB <=> YUV conversion stuffs.
|
||
|
|
YUV coversion is explained as following formula in strict meaning:
|
||
|
|
Y = 0.299R + 0.587G + 0.114B ( 0<=Y<=255)
|
||
|
|
U = -0.169R - 0.331G + 0.500B (-128<=U<=127)
|
||
|
|
V = 0.500R - 0.419G - 0.081B (-128<=V<=127)
|
||
|
|
|
||
|
|
I use simple conversion RCT(reversible color transform) which is described
|
||
|
|
in JPEG-2000 specification.
|
||
|
|
Y = (R + 2G + B)/4 ( 0<=Y<=255)
|
||
|
|
U = B-G (-256<=U<=255)
|
||
|
|
V = R-G (-256<=V<=255)
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* RCT is N-bit RGB to N-bit Y and N+1-bit UV.
|
||
|
|
For make Same N-bit, UV is lossy.
|
||
|
|
More exact PLHarr, we reduce to odd range(-127<=x<=127). */
|
||
|
|
#define ZYWRLE_RGBYUV_(r, g, b, y, u, v, ymask, uvmask) \
|
||
|
|
do { \
|
||
|
|
y = (r + (g << 1) + b) >> 2; \
|
||
|
|
u = b - g; \
|
||
|
|
v = r - g; \
|
||
|
|
y -= 128; \
|
||
|
|
u >>= 1; \
|
||
|
|
v >>= 1; \
|
||
|
|
y &= ymask; \
|
||
|
|
u &= uvmask; \
|
||
|
|
v &= uvmask; \
|
||
|
|
if (y == -128) { \
|
||
|
|
y += (0xFFFFFFFF - ymask + 1); \
|
||
|
|
} \
|
||
|
|
if (u == -128) { \
|
||
|
|
u += (0xFFFFFFFF - uvmask + 1); \
|
||
|
|
} \
|
||
|
|
if (v == -128) { \
|
||
|
|
v += (0xFFFFFFFF - uvmask + 1); \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
coefficient packing/unpacking stuffs.
|
||
|
|
Wavelet transform makes 4 sub coefficient image from 1 original image.
|
||
|
|
|
||
|
|
model with pyramid decomposition:
|
||
|
|
+------+------+
|
||
|
|
| | |
|
||
|
|
| L | Hx |
|
||
|
|
| | |
|
||
|
|
+------+------+
|
||
|
|
| | |
|
||
|
|
| H | Hxy |
|
||
|
|
| | |
|
||
|
|
+------+------+
|
||
|
|
|
||
|
|
So, we must transfer each sub images individually in strict meaning.
|
||
|
|
But at least ZRLE meaning, following one decompositon image is same as
|
||
|
|
avobe individual sub image. I use this format.
|
||
|
|
(Strictly saying, transfer order is reverse(Hxy->Hy->Hx->L)
|
||
|
|
for simplified procedure for any wavelet level.)
|
||
|
|
|
||
|
|
+------+------+
|
||
|
|
| L |
|
||
|
|
+------+------+
|
||
|
|
| Hx |
|
||
|
|
+------+------+
|
||
|
|
| Hy |
|
||
|
|
+------+------+
|
||
|
|
| Hxy |
|
||
|
|
+------+------+
|
||
|
|
*/
|
||
|
|
#define ZYWRLE_INC_PTR(data) \
|
||
|
|
do { \
|
||
|
|
data++; \
|
||
|
|
if( data - p >= (w + uw) ) { \
|
||
|
|
data += scanline-(w + uw); \
|
||
|
|
p = data; \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define ZYWRLE_TRANSFER_COEFF(buf, data, t, w, h, scanline, level, TRANS) \
|
||
|
|
do { \
|
||
|
|
ph = buf; \
|
||
|
|
s = 2 << level; \
|
||
|
|
if (t & 0x01) { \
|
||
|
|
ph += s >> 1; \
|
||
|
|
} \
|
||
|
|
if (t & 0x02) { \
|
||
|
|
ph += (s >> 1) * w; \
|
||
|
|
} \
|
||
|
|
end = ph + h * w; \
|
||
|
|
while (ph < end) { \
|
||
|
|
line = ph + w; \
|
||
|
|
while (ph < line) { \
|
||
|
|
TRANS \
|
||
|
|
ZYWRLE_INC_PTR(data); \
|
||
|
|
ph += s; \
|
||
|
|
} \
|
||
|
|
ph += (s - 1) * w; \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define ZYWRLE_PACK_COEFF(buf, data, t, width, height, scanline, level) \
|
||
|
|
ZYWRLE_TRANSFER_COEFF(buf, data, t, width, height, scanline, level, \
|
||
|
|
ZYWRLE_LOAD_COEFF(ph, r, g, b); \
|
||
|
|
ZYWRLE_SAVE_PIXEL(data, r, g, b);)
|
||
|
|
|
||
|
|
#define ZYWRLE_UNPACK_COEFF(buf, data, t, width, height, scanline, level) \
|
||
|
|
ZYWRLE_TRANSFER_COEFF(buf, data, t, width, height, scanline, level, \
|
||
|
|
ZYWRLE_LOAD_PIXEL(data, r, g, b); \
|
||
|
|
ZYWRLE_SAVE_COEFF(ph, r, g, b);)
|
||
|
|
|
||
|
|
#define ZYWRLE_SAVE_UNALIGN(data, TRANS) \
|
||
|
|
do { \
|
||
|
|
top = buf + w * h; \
|
||
|
|
end = buf + (w + uw) * (h + uh); \
|
||
|
|
while (top < end) { \
|
||
|
|
TRANS \
|
||
|
|
ZYWRLE_INC_PTR(data); \
|
||
|
|
top++; \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define ZYWRLE_LOAD_UNALIGN(data,TRANS) \
|
||
|
|
do { \
|
||
|
|
top = buf + w * h; \
|
||
|
|
if (uw) { \
|
||
|
|
p = data + w; \
|
||
|
|
end = (int*)(p + h * scanline); \
|
||
|
|
while (p < (ZRLE_PIXEL*)end) { \
|
||
|
|
line = (int*)(p + uw); \
|
||
|
|
while (p < (ZRLE_PIXEL*)line) { \
|
||
|
|
TRANS \
|
||
|
|
p++; \
|
||
|
|
top++; \
|
||
|
|
} \
|
||
|
|
p += scanline - uw; \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
if (uh) { \
|
||
|
|
p = data + h * scanline; \
|
||
|
|
end = (int*)(p + uh * scanline); \
|
||
|
|
while (p < (ZRLE_PIXEL*)end) { \
|
||
|
|
line = (int*)(p + w); \
|
||
|
|
while (p < (ZRLE_PIXEL*)line) { \
|
||
|
|
TRANS \
|
||
|
|
p++; \
|
||
|
|
top++; \
|
||
|
|
} \
|
||
|
|
p += scanline - w; \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
if (uw && uh) { \
|
||
|
|
p= data + w + h * scanline; \
|
||
|
|
end = (int*)(p + uh * scanline); \
|
||
|
|
while (p < (ZRLE_PIXEL*)end) { \
|
||
|
|
line = (int*)(p + uw); \
|
||
|
|
while (p < (ZRLE_PIXEL*)line) { \
|
||
|
|
TRANS \
|
||
|
|
p++; \
|
||
|
|
top++; \
|
||
|
|
} \
|
||
|
|
p += scanline-uw; \
|
||
|
|
} \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
static inline void zywrle_calc_size(int *w, int *h, int level)
|
||
|
|
{
|
||
|
|
*w &= ~((1 << level) - 1);
|
||
|
|
*h &= ~((1 << level) - 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|