| /******************************************************************** |
| * * |
| * 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 |
