565.c
上传用户:dangjiwu
上传日期:2013-07-19
资源大小:42019k
文件大小:32k
- 1/* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: 565.c,v 1.2.8.1 2004/07/09 02:00:07 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include <stdlib.h>
- #include "nostatic/colorlib.h"
- #include "nostatic/yuv.h"
- /*
- * Color conversion routines for converting YUV420 as produced by the
- * RealVideo decoders to RGB565.
- */
- /*
- * Format-conversion routines.
- * Use:
- * int XXXXtoYYYYEx (unsigned char *dest_ptr, int dest_width, int dest_height,
- * int dest_pitch, int dest_x, int dest_y, int dest_dx, int dest_dy,
- * unsigned char *src_ptr, int src_width, int src_height, int src_pitch,
- * int src_x, int src_y, int src_dx, int src_dy);
- * Input:
- * dest_ptr - pointer to a destination buffer
- * dest_width, dest_height - width/height of the destination image (pixels)
- * dest_pitch - pitch of the dest. buffer (in bytes; <0 - if bottom up image)
- * dest_x, dest_y, dest_dx, dest_dy - destination rectangle (pixels)
- * src_ptr - pointer to an input image
- * src_width, src_height - width/height of the input image (pixels)
- * src_pitch - pitch of the source buffer (in bytes; <0 - if bottom up image)
- * src_x, src_y, src_dx, src_dy - source rectangle (pixels)
- * Returns:
- * 0 - if success; -1 if failure.
- * Notes:
- * a) In all cases, pointers to the source and destination buffers must be
- * DWORD aligned, and both pitch parameters must be multiple of 4!!!
- * b) Converters that deal with YUV 4:2:2, or 4:2:0 formats may also require
- * rectangle parameters (x,y,dx,dy) to be multiple of 2. Failure to provide
- * aligned rectangles will result in partially converted image.
- * c) Currently only scale factors of 1:1 and 2:1 are supported; if the rates
- * dest_dx/src_dx & dest_dy/src_dy are neither 1, or 2, the converters
- * will fail.
- */
- #define BYTESPERPIXEL 2
- /* Indexing tables */
- static const int next[3] = {1, 2, 0}; /* (ibuf+1)%3 table */
- static const int next2[3] = {2, 0, 1}; /* (ibuf+2)%3 table */
- /* Half resolution converter. */
- static void halfI420toRGB565 (unsigned char *d1,
- int dest_x, unsigned char *sy1,
- unsigned char *sy2, unsigned char *su,
- unsigned char *sv, int src_x, int dx, int isodd,
- color_data_t* pcd)
- {
- /* check if we have misaligned input/output: */
- if ((src_x ^ dest_x) & 1) {
-
- ; /* not implemented yet */
-
- } else {
-
- /* aligned input/output: */
- register int y11, y12;
- register int rv1, guv1, bu1, rv2, guv2, bu2;
- register int i;
-
- /* source width should always be multiples of 4 */
- /* assert((src_x & 3)==0); */
- /* convert all integral 2x4 blocks: */
- if (isodd)
- for (i = 0; i < dx/4; i ++) {
-
- /* first 2x2 block */
- rv1 = pcd->rvtab[sv[0]];
- guv1 = pcd->gutab[su[0]] + pcd->gvtab[sv[0]];
- bu1 = pcd->butab[su[0]];
- y11 = (pcd->ytab[sy1[0]] + pcd->ytab[sy1[1]] + pcd->ytab[sy2[0]] + pcd->ytab[sy2[1]])>>2; /* avg */
-
- /* second 2x2 block */
- rv2 = pcd->rvtab[sv[1]];
- guv2 = pcd->gutab[su[1]] + pcd->gvtab[sv[1]];
- bu2 = pcd->butab[su[1]];
- y12 = (pcd->ytab[sy1[2]] + pcd->ytab[sy1[3]] + pcd->ytab[sy2[2]] + pcd->ytab[sy2[3]])>>2;
-
- /* output 4 bytes at a time */
- *(unsigned int *)(d1+0) =
- (CLIP5[y11 + bu1 + DITH5L] << 0) |
- (CLIP6[y11 + guv1 + DITH6L] << 5) |
- (CLIP5[y11 + rv1 + DITH5L] << 11) |
- (CLIP5[y12 + bu2 + DITH5H] << 16) |
- (CLIP6[y12 + guv2 + DITH6H] << 21) |
- (CLIP5[y12 + rv2 + DITH5H] << 27) ;
-
- /* next 4x2 block */
- sy1 += 4; sy2 += 4;
- su += 2; sv += 2;
- d1 += 2*BPP2;
- }
- else
- for (i = 0; i < dx/4; i ++) {
-
- /* first 2x2 block */
- rv1 = pcd->rvtab[sv[0]];
- guv1 = pcd->gutab[su[0]] + pcd->gvtab[sv[0]];
- bu1 = pcd->butab[su[0]];
- y11 = (pcd->ytab[sy1[0]] + pcd->ytab[sy1[1]] + pcd->ytab[sy2[0]] + pcd->ytab[sy2[1]])>>2; /* avg */
-
- /* second 2x2 block */
- rv2 = pcd->rvtab[sv[1]];
- guv2 = pcd->gutab[su[1]] + pcd->gvtab[sv[1]];
- bu2 = pcd->butab[su[1]];
- y12 = (pcd->ytab[sy1[2]] + pcd->ytab[sy1[3]] + pcd->ytab[sy2[2]] + pcd->ytab[sy2[3]])>>2;
-
- /* output 4 bytes at a time */
- *(unsigned int *)(d1+0) =
- (CLIP5[y11 + bu1 + DITH5H] << 0) |
- (CLIP6[y11 + guv1 + DITH6H] << 5) |
- (CLIP5[y11 + rv1 + DITH5H] << 11) |
- (CLIP5[y12 + bu2 + DITH5L] << 16) |
- (CLIP6[y12 + guv2 + DITH6L] << 21) |
- (CLIP5[y12 + rv2 + DITH5L] << 27) ;
-
- /* next 4x2 block */
- sy1 += 4; sy2 += 4;
- su += 2; sv += 2;
- d1 += 2*BPP2;
- }
- }
- }
- static void dblineI420toRGB565 (unsigned char *d1, unsigned char *d2,
- int dest_x, unsigned char *sy1,
- unsigned char *sy2, unsigned char *su,
- unsigned char *sv, int src_x, int dx,
- color_data_t* pcd)
- {
- /* check if we have misaligned input/output: */
- if ((src_x ^ dest_x) & 1) {
- ; /* not implemented yet */
- } else {
- /* aligned input/output: */
- register int y11, y12, y21, y22;
- register int rv, guv, bu;
- register int i;
- /* convert first 2x1 block: */
- if (dest_x & 1) {
- rv = pcd->rvtab[sv[0]];
- guv = pcd->gutab[su[0]] + pcd->gvtab[sv[0]];
- bu = pcd->butab[su[0]];
- y11 = pcd->ytab[sy1[0]];
- y21 = pcd->ytab[sy2[0]];
- /* output 2 bytes at a time */
- *(unsigned short *)(d1+0) =
- (CLIP5[y11 + bu + DITH5L] << 0) |
- (CLIP6[y11 + guv + DITH6L] << 5) |
- (CLIP5[y11 + rv + DITH5L] << 11) ;
- *(unsigned short *)(d2+0) =
- (CLIP5[y21 + bu + DITH5H] << 0) |
- (CLIP6[y21 + guv + DITH6H] << 5) |
- (CLIP5[y21 + rv + DITH5H] << 11) ;
- sy1 += 1; sy2 += 1;
- su += 1; sv += 1;
- d1 += BPP2; d2 += BPP2;
- dest_x ++; dx --;
- }
- /* convert first 2x2 block: */
- if (dest_x & 2) {
- rv = pcd->rvtab[sv[0]];
- guv = pcd->gutab[su[0]] + pcd->gvtab[sv[0]];
- bu = pcd->butab[su[0]];
- y11 = pcd->ytab[sy1[0]];
- y12 = pcd->ytab[sy1[1]];
- /* output 4 bytes at a time */
- *(unsigned int *)(d1+0) =
- (CLIP5[y11 + bu + DITH5L] << 0) |
- (CLIP6[y11 + guv + DITH6L] << 5) |
- (CLIP5[y11 + rv + DITH5L] << 11) |
- (CLIP5[y12 + bu + DITH5H] << 16) |
- (CLIP6[y12 + guv + DITH6H] << 21) |
- (CLIP5[y12 + rv + DITH5H] << 27) ;
- y21 = pcd->ytab[sy2[0]];
- y22 = pcd->ytab[sy2[1]];
- *(unsigned int *)(d2+0) =
- (CLIP5[y21 + bu + DITH5H] << 0) |
- (CLIP6[y21 + guv + DITH6H] << 5) |
- (CLIP5[y21 + rv + DITH5H] << 11) |
- (CLIP5[y22 + bu + DITH5L] << 16) |
- (CLIP6[y22 + guv + DITH6L] << 21) |
- (CLIP5[y22 + rv + DITH5L] << 27) ;
- sy1 += 2; sy2 += 2;
- su += 1; sv += 1;
- d1 += 2*BPP2; d2 += 2*BPP2;
- dest_x += 2; dx -= 2;
- }
- /* convert all integral 2x4 blocks: */
- for (i = 0; i < dx/4; i ++) {
- /* first 2x2 block */
- rv = pcd->rvtab[sv[0]];
- guv = pcd->gutab[su[0]] + pcd->gvtab[sv[0]];
- bu = pcd->butab[su[0]];
- y11 = pcd->ytab[sy1[0]];
- y12 = pcd->ytab[sy1[1]];
- /* output 4 bytes at a time */
- *(unsigned int *)(d1+0) =
- (CLIP5[y11 + bu + DITH5L] << 0) |
- (CLIP6[y11 + guv + DITH6L] << 5) |
- (CLIP5[y11 + rv + DITH5L] << 11) |
- (CLIP5[y12 + bu + DITH5H] << 16) |
- (CLIP6[y12 + guv + DITH6H] << 21) |
- (CLIP5[y12 + rv + DITH5H] << 27) ;
- y21 = pcd->ytab[sy2[0]];
- y22 = pcd->ytab[sy2[1]];
- *(unsigned int *)(d2+0) =
- (CLIP5[y21 + bu + DITH5H] << 0) |
- (CLIP6[y21 + guv + DITH6H] << 5) |
- (CLIP5[y21 + rv + DITH5H] << 11) |
- (CLIP5[y22 + bu + DITH5L] << 16) |
- (CLIP6[y22 + guv + DITH6L] << 21) |
- (CLIP5[y22 + rv + DITH5L] << 27) ;
- /* second 2x2 block */
- rv = pcd->rvtab[sv[1]];
- guv = pcd->gutab[su[1]] + pcd->gvtab[sv[1]];
- bu = pcd->butab[su[1]];
- y11 = pcd->ytab[sy1[2]];
- y12 = pcd->ytab[sy1[3]];
- *(unsigned int *)(d1+2*BPP2) =
- (CLIP5[y11 + bu + DITH5L] << 0) |
- (CLIP6[y11 + guv + DITH6L] << 5) |
- (CLIP5[y11 + rv + DITH5L] << 11) |
- (CLIP5[y12 + bu + DITH5H] << 16) |
- (CLIP6[y12 + guv + DITH6H] << 21) |
- (CLIP5[y12 + rv + DITH5H] << 27) ;
- y21 = pcd->ytab[sy2[2]];
- y22 = pcd->ytab[sy2[3]];
- *(unsigned int *)(d2+2*BPP2) =
- (CLIP5[y21 + bu + DITH5H] << 0) |
- (CLIP6[y21 + guv + DITH6H] << 5) |
- (CLIP5[y21 + rv + DITH5H] << 11) |
- (CLIP5[y22 + bu + DITH5L] << 16) |
- (CLIP6[y22 + guv + DITH6L] << 21) |
- (CLIP5[y22 + rv + DITH5L] << 27) ;
- /* next 4x2 block */
- sy1 += 4; sy2 += 4;
- su += 2; sv += 2;
- d1 += 4*BPP2; d2 += 4*BPP2;
- }
- /* convert last 2x2 block: */
- if (dx & 2) {
- rv = pcd->rvtab[sv[0]];
- guv = pcd->gutab[su[0]] + pcd->gvtab[sv[0]];
- bu = pcd->butab[su[0]];
- y11 = pcd->ytab[sy1[0]];
- y12 = pcd->ytab[sy1[1]];
- /* output 4 bytes at a time */
- *(unsigned int *)(d1+0) =
- (CLIP5[y11 + bu + DITH5L] << 0) |
- (CLIP6[y11 + guv + DITH6L] << 5) |
- (CLIP5[y11 + rv + DITH5L] << 11) |
- (CLIP5[y12 + bu + DITH5H] << 16) |
- (CLIP6[y12 + guv + DITH6H] << 21) |
- (CLIP5[y12 + rv + DITH5H] << 27) ;
- y21 = pcd->ytab[sy2[0]];
- y22 = pcd->ytab[sy2[1]];
- *(unsigned int *)(d2+0) =
- (CLIP5[y21 + bu + DITH5H] << 0) |
- (CLIP6[y21 + guv + DITH6H] << 5) |
- (CLIP5[y21 + rv + DITH5H] << 11) |
- (CLIP5[y22 + bu + DITH5L] << 16) |
- (CLIP6[y22 + guv + DITH6L] << 21) |
- (CLIP5[y22 + rv + DITH5L] << 27) ;
- sy1 += 2; sy2 += 2;
- su += 1; sv += 1;
- d1 += 2*BPP2; d2 += 2*BPP2;
- dx -= 2;
- }
- /* convert last 2x1 block: */
- if (dx & 1) {
- rv = pcd->rvtab[sv[0]];
- guv = pcd->gutab[su[0]] + pcd->gvtab[sv[0]];
- bu = pcd->butab[su[0]];
- y11 = pcd->ytab[sy1[0]];
- y21 = pcd->ytab[sy2[0]];
- /* output 2 bytes at a time */
- *(unsigned short *)(d1+0) =
- (CLIP5[y11 + bu + DITH5L] << 0) |
- (CLIP6[y11 + guv + DITH6L] << 5) |
- (CLIP5[y11 + rv + DITH5L] << 11) ;
- *(unsigned short *)(d2+0) =
- (CLIP5[y21 + bu + DITH5H] << 0) |
- (CLIP6[y21 + guv + DITH6H] << 5) |
- (CLIP5[y21 + rv + DITH5H] << 11) ;
- }
- }
- }
- #define DITH1X4L 0x01002004
- #define DITH1X4H 0x0300600C
- #define DITH2X4L 0x02004008
- #define DITH2X4H 0x0600C018
- #define DITH4X4L 0x04008010
- #define DITH4X4H 0x0C018030
- /* RGB565 version: */
- static void dblineXRGBtoRGB565x2 (unsigned char *d1, unsigned char *d2, int dest_x,
- unsigned char *s1, unsigned char *s2, int src_x, int dx,
- color_data_t* pcd)
- {
- register unsigned int a, b, c, d, e, f;
- register unsigned int w, x, y, z;
- /* convert first 2x1 block: */
- if (dest_x & 1) {
- /* Input pels => Output pels
- * a b w x
- * c d w' x'
- */
- /* top line */
- a = *(unsigned int *)s1;
- b = *(unsigned int *)(s1+BPP4);
- w = a + DITH1X4L;
- x = a + b + DITH2X4H;
- /* pack and store */
- *(unsigned int *)d1 =
- ((w & 0x000000f8) >> 3) |
- ((w & 0x0007e000) >> 8) |
- ((w & 0x3e000000) >> 14) |
- ((x & 0x000001f0) << 12) |
- ((x & 0x000fc000) << 7) |
- ((x & 0x7c000000) << 1);
- /* bottom line */
- c = *(unsigned int *)s2;
- d = *(unsigned int *)(s2+BPP4);
- w = a + c + DITH2X4H;
- x = a + b + c + d + DITH4X4L;
- /* pack and store */
- *(unsigned int *)d2 =
- ((w & 0x000001f0) >> 4) |
- ((w & 0x000fc000) >> 9) |
- ((w & 0x7c000000) >> 15) |
- ((x & 0x000003e0) << 11) |
- ((x & 0x001f8000) << 6) |
- ((x & 0xf8000000) << 0);
- /* bump pointers to next block */
- s1 += BPP4; s2 += BPP4;
- d1 += 2*BPP2; d2 += 2*BPP2;
- dx -= 1;
- }
- /* process all integral 2x2 blocks: */
- while (dx > 2) { /* we need to leave at least one block */
- /*
- * Input stored as 00 RRRRRRRR 000 GGGGGGGG 000 BBBBBBBB
- *
- * Input pels Output pels
- * a b e w x y z
- * c d f w' x' y' z'
- */
- /* top line */
- a = *(unsigned int *)s1;
- b = *(unsigned int *)(s1+BPP4);
- e = *(unsigned int *)(s1+2*BPP4);
- w = a + DITH1X4L;
- x = a + b + DITH2X4H;
- y = b + DITH1X4L;
- z = b + e + DITH2X4H;
- /* pack and store */
- *(unsigned int *)d1 =
- ((w & 0x000000f8) >> 3) |
- ((w & 0x0007e000) >> 8) |
- ((w & 0x3e000000) >> 14) |
- ((x & 0x000001f0) << 12) |
- ((x & 0x000fc000) << 7) |
- ((x & 0x7c000000) << 1);
- *(unsigned int *)(d1+2*BPP2) =
- ((y & 0x000000f8) >> 3) |
- ((y & 0x0007e000) >> 8) |
- ((y & 0x3e000000) >> 14) |
- ((z & 0x000001f0) << 12) |
- ((z & 0x000fc000) << 7) |
- ((z & 0x7c000000) << 1);
- /* bottom line */
- c = *(unsigned int *)s2;
- d = *(unsigned int *)(s2+BPP4);
- f = *(unsigned int *)(s2+2*BPP4);
- w = a + c + DITH2X4H;
- x = a + b + c + d + DITH4X4L;
- y = b + d + DITH2X4H;
- z = b + e + d + f + DITH4X4L;
- /* pack and store */
- *(unsigned int *)d2 =
- ((w & 0x000001f0) >> 4) |
- ((w & 0x000fc000) >> 9) |
- ((w & 0x7c000000) >> 15) |
- ((x & 0x000003e0) << 11) |
- ((x & 0x001f8000) << 6) |
- ((x & 0xf8000000) << 0);
- *(unsigned int *)(d2+2*BPP2) =
- ((y & 0x000001f0) >> 4) |
- ((y & 0x000fc000) >> 9) |
- ((y & 0x7c000000) >> 15) |
- ((z & 0x000003e0) << 11) |
- ((z & 0x001f8000) << 6) |
- ((z & 0xf8000000) << 0);
- /* next 2x2 input block */
- s1 += 2*BPP4; s2 += 2*BPP4;
- d1 += 4*BPP2; d2 += 4*BPP2;
- dx -= 2;
- }
- /* check if this is the last 2x2 block: */
- if (dx > 1) {
- /*
- * For last 4 output pels, repeat final input pel
- * for offscreen input. Equivalent to pixel-doubling the
- * last output pel.
- */
- /* top line */
- a = *(unsigned int *)s1;
- b = *(unsigned int *)(s1+BPP4);
- e = b; /* repeat last input pel */
- w = a + DITH1X4L;
- x = a + b + DITH2X4H;
- y = b + DITH1X4L;
- z = b + e + DITH2X4H;
- /* pack and store */
- *(unsigned int *)d1 =
- ((w & 0x000000f8) >> 3) |
- ((w & 0x0007e000) >> 8) |
- ((w & 0x3e000000) >> 14) |
- ((x & 0x000001f0) << 12) |
- ((x & 0x000fc000) << 7) |
- ((x & 0x7c000000) << 1);
- *(unsigned int *)(d1+2*BPP2) =
- ((y & 0x000000f8) >> 3) |
- ((y & 0x0007e000) >> 8) |
- ((y & 0x3e000000) >> 14) |
- ((z & 0x000001f0) << 12) |
- ((z & 0x000fc000) << 7) |
- ((z & 0x7c000000) << 1);
- /* bottom line */
- c = *(unsigned int *)s2;
- d = *(unsigned int *)(s2+BPP4);
- f = d; /* repeat last input pel */
- w = a + c + DITH2X4H;
- x = a + b + c + d + DITH4X4L;
- y = b + d + DITH2X4H;
- z = b + e + d + f + DITH4X4L;
- /* pack and store */
- *(unsigned int *)d2 =
- ((w & 0x000001f0) >> 4) |
- ((w & 0x000fc000) >> 9) |
- ((w & 0x7c000000) >> 15) |
- ((x & 0x000003e0) << 11) |
- ((x & 0x001f8000) << 6) |
- ((x & 0xf8000000) << 0);
- *(unsigned int *)(d2+2*BPP2) =
- ((y & 0x000001f0) >> 4) |
- ((y & 0x000fc000) >> 9) |
- ((y & 0x7c000000) >> 15) |
- ((z & 0x000003e0) << 11) |
- ((z & 0x001f8000) << 6) |
- ((z & 0xf8000000) << 0);
- } else {
- /* last 2x1 block: */
- /* Input pels => Output pels
- * a b w x
- * c d w' x'
- */
- /* top line */
- a = *(unsigned int *)s1;
- b = a; /* repeat last input pel */
- w = a + DITH1X4L;
- x = a + b + DITH2X4H;
- /* pack and store */
- *(unsigned int *)d1 =
- ((w & 0x000000f8) >> 3) |
- ((w & 0x0007e000) >> 8) |
- ((w & 0x3e000000) >> 14) |
- ((x & 0x000001f0) << 12) |
- ((x & 0x000fc000) << 7) |
- ((x & 0x7c000000) << 1);
- /* bottom line */
- c = *(unsigned int *)s2;
- d = c; /* repeat last input pel */
- w = a + c + DITH2X4H;
- x = a + b + c + d + DITH4X4L;
- /* pack and store */
- *(unsigned int *)d2 =
- ((w & 0x000001f0) >> 4) |
- ((w & 0x000fc000) >> 9) |
- ((w & 0x7c000000) >> 15) |
- ((x & 0x000003e0) << 11) |
- ((x & 0x001f8000) << 6) |
- ((x & 0xf8000000) << 0);
- }
- }
- /*
- * Convert two YUV lines into RGB linebufs.
- * Produces two RGB lines per call.
- * Output in padded RGB format, needed for SIMD interpolation.
- */
- static void dblineI420toXRGB (unsigned char *d1, unsigned char *d2, int dest_x,
- unsigned char *sy1, unsigned char *sy2, unsigned char *su, unsigned char *sv,
- int src_x, int dx,
- color_data_t* pcd)
- {
- register int y1, y2, rv, guv, bu;
- register int i;
- /* convert first 2x1 block: */
- if (src_x & 1) {
- bu = pcd->butab[su[0]];
- guv = pcd->gutab[su[0]] + pcd->gvtab[sv[0]];
- rv = pcd->rvtab[sv[0]];
- y1 = pcd->ytab[sy1[0]];
- y2 = pcd->ytab[sy2[0]];
- /* first line 00rrrrrr.rr000ggg.ggggg000.bbbbbbbb: */
- *(unsigned int *)(d1+0) =
- (CLIP8[y1 + bu]) |
- (CLIP8[y1 + guv] << 11) |
- (CLIP8[y1 + rv] << 22) ;
- /* second line 00rrrrrr.rr000ggg.ggggg000.bbbbbbbb: */
- *(unsigned int *)(d2+0) =
- (CLIP8[y2 + bu]) |
- (CLIP8[y2 + guv] << 11) |
- (CLIP8[y2 + rv] << 22) ;
- sy1 += 1; sy2 += 1;
- su += 1; sv += 1;
- d1 += BPP4; d2 += BPP4;
- dx --;
- }
- /* convert all integral 2x2 blocks: */
- for (i = 0; i < dx/2; i ++) {
- bu = pcd->butab[su[0]];
- guv = pcd->gutab[su[0]] + pcd->gvtab[sv[0]];
- rv = pcd->rvtab[sv[0]];
- y1 = pcd->ytab[sy1[0]];
- y2 = pcd->ytab[sy2[0]];
- /* first line 00rrrrrr.rr000ggg.ggggg000.bbbbbbbb: */
- *(unsigned int *)(d1+0) =
- (CLIP8[y1 + bu]) |
- (CLIP8[y1 + guv] << 11) |
- (CLIP8[y1 + rv] << 22) ;
- /* second line 00rrrrrr.rr000ggg.ggggg000.bbbbbbbb: */
- *(unsigned int *)(d2+0) =
- (CLIP8[y2 + bu]) |
- (CLIP8[y2 + guv] << 11) |
- (CLIP8[y2 + rv] << 22) ;
- /* 2nd row: */
- y1 = pcd->ytab[sy1[1]];
- y2 = pcd->ytab[sy2[1]];
- /* first line 00rrrrrr.rr000ggg.ggggg000.bbbbbbbb: */
- *(unsigned int *)(d1+BPP4) =
- (CLIP8[y1 + bu]) |
- (CLIP8[y1 + guv] << 11) |
- (CLIP8[y1 + rv] << 22) ;
- /* second line 00rrrrrr.rr000ggg.ggggg000.bbbbbbbb: */
- *(unsigned int *)(d2+BPP4) =
- (CLIP8[y2 + bu]) |
- (CLIP8[y2 + guv] << 11) |
- (CLIP8[y2 + rv] << 22) ;
- /* next 2x2 block */
- sy1 += 2; sy2 += 2;
- su += 1; sv += 1;
- d1 += 2*BPP4; d2 += 2*BPP4;
- }
- /* convert last 2x1 block: */
- if (dx & 1) {
- bu = pcd->butab[su[0]];
- guv = pcd->gutab[su[0]] + pcd->gvtab[sv[0]];
- rv = pcd->rvtab[sv[0]];
- y1 = pcd->ytab[sy1[0]];
- y2 = pcd->ytab[sy2[0]];
- /* first line 00rrrrrr.rr000ggg.ggggg000.bbbbbbbb: */
- *(unsigned int *)(d1+0) =
- (CLIP8[y1 + bu]) |
- (CLIP8[y1 + guv] << 11) |
- (CLIP8[y1 + rv] << 22) ;
- /* second line BGR0 */
- *(unsigned int *)(d2+0) =
- (CLIP8[y2 + bu]) |
- (CLIP8[y2 + guv] << 11) |
- (CLIP8[y2 + rv] << 22) ;
- }
- }
- /*
- * I420->RGB565 converter:
- */
- int I420toRGB565 (unsigned char *dest_ptr, int dest_width, int dest_height,
- int dest_pitch, int dest_x, int dest_y, int dest_dx, int dest_dy,
- unsigned char *src_ptr, int src_width, int src_height, int src_pitch,
- int src_x, int src_y, int src_dx, int src_dy,
- color_data_t* pcd)
- {
- /* scale factors: */
- int scale_x, scale_y;
- /* check arguments: */
- if (!chk_args (dest_ptr, dest_width, dest_height, dest_pitch,
- dest_x, dest_y, dest_dx, dest_dy, src_ptr, src_width, src_height,
- src_pitch, src_x, src_y, src_dx, src_dy, &scale_x, &scale_y))
- return -1;
- /* check if bottop-up images: */
- if (dest_pitch < 0) dest_ptr -= (dest_height-1) * dest_pitch;
- if (src_pitch <= 0) return -1; /* not supported */
- /* check if 1:1 scale: */
- if (scale_x == 1 && scale_y == 1) {
- /* color converter to use: */
- void (*dbline) (unsigned char *d1, unsigned char *d2, int dest_x,
- unsigned char *sy1, unsigned char *sy2, unsigned char *su, unsigned char *sv,
- int src_x, int dx, color_data_t* pcd) =
- dblineI420toRGB565;
- /* local variables: */
- unsigned char *sy1, *sy2, *su, *sv, *d1, *d2;
- register int j;
- /* get pointers: */
- sy1 = src_ptr + (src_x + src_y * src_pitch); /* luma offset */
- sy2 = sy1 + src_pitch;
- su = src_ptr + src_height * src_pitch + (src_x/2 + src_y/2 * src_pitch);
- sv = su + src_height * src_pitch / 4;
- d1 = dest_ptr + dest_x * 2 + dest_y * dest_pitch; /* RGB offset */
- d2 = d1 + dest_pitch;
- /* convert a top line: */
- if (src_y & 1) { /* chroma shift */
- /* this is a bit inefficient, but who cares??? */
- (* dbline) (d1, d1, dest_x, sy1, sy1, su, sv, src_x, src_dx, pcd);
- sy1 += src_pitch; sy2 += src_pitch;
- su += src_pitch/2; sv += src_pitch/2;
- d1 += dest_pitch; d2 += dest_pitch;
- dest_dy --;
- }
- /* convert aligned portion of the image: */
- for (j = 0; j < dest_dy/2; j ++) {
- /* convert two lines a time: */
- (* dbline) (d1, d2, dest_x, sy1, sy2, su, sv, src_x, src_dx, pcd);
- sy1 += src_pitch*2; sy2 += src_pitch*2;
- su += src_pitch/2; sv += src_pitch/2;
- d1 += dest_pitch*2; d2 += dest_pitch*2;
- }
- /* convert bottom line (if dest_dy is odd): */
- if (dest_dy & 1) {
- /* convert one line only: */
- (* dbline) (d1, d1, dest_x, sy1, sy1, su, sv, src_x, src_dx, pcd);
- }
- return 0;
- }
- /* check if 2:1 scale: */
- if (scale_x == 2 && scale_y == 2) {
- /* color converter & interpolator to use: */
- void (*cvt) (unsigned char *d1, unsigned char *d2, int dest_x,
- unsigned char *sy1, unsigned char *sy2, unsigned char *su, unsigned char *sv,
- int src_x, int dx, color_data_t* pcd) = dblineI420toXRGB;
- void (*x2) (unsigned char *d1, unsigned char *d2, int dest_x,
- unsigned char *s1, unsigned char *s2, int src_x, int dx, color_data_t* pcd) = dblineXRGBtoRGB565x2;
- /* local variables: */
- unsigned char *sy1, *sy2, *su, *sv, *d1, *d2;
- register int dy = src_dy;
- /* line buffers (we want them to be as compact as possible): */
- int ibuf = 0; /* circular buffer index */
- unsigned char * buf[3]; /* actual pointers */
- buf[0] = pcd->linebuf;
- buf[1] = pcd->linebuf + src_dx * BPP4;
- buf[2] = pcd->linebuf + 2 * src_dx * BPP4;
- /* get pointers: */
- sy1 = src_ptr + (src_x + src_y * src_pitch); /* luma offset */
- sy2 = sy1 + src_pitch;
- su = src_ptr + src_height * src_pitch + (src_x/2 + src_y/2 * src_pitch);
- sv = su + src_height * src_pitch / 4;
- d1 = dest_ptr + dest_x * BYTESPERPIXEL + dest_y * dest_pitch; /* RGB offset */
- d2 = d1 + dest_pitch;
- /* check if we have misaligned top line: */
- if (src_y & 1) {
- /* convert an odd first line: */
- (*cvt) (buf[ibuf], buf[ibuf], 0, sy1, sy1, su, sv, src_x, src_dx, pcd);
- sy1 += src_pitch; sy2 += src_pitch;
- su += src_pitch/2; sv += src_pitch/2;
- dy --;
- } else {
- /* otherwise, convert first two lines: */
- (*cvt) (buf[next[ibuf]], buf[next2[ibuf]], 0, sy1, sy2, su, sv, src_x, src_dx, pcd);
- sy1 += src_pitch*2; sy2 += src_pitch*2;
- su += src_pitch/2; sv += src_pitch/2;
- ibuf = next[ibuf]; /* skip first interpolation: */
- (*x2) (d1, d2, dest_x, buf[ibuf], buf[next[ibuf]], 0, src_dx, pcd);
- d1 += dest_pitch*2; d2 += dest_pitch*2;
- ibuf = next[ibuf];
- dy -= 2;
- }
- /*
- * Convert & interpolate the main portion of image:
- *
- * source: temp.store: destination:
- *
- * buf[ibuf] ------- /--> d1
- * x2 --> d2
- * s1 -- /-> buf[next[ibuf]] -< /--> d1'=d1+2*pitch
- * cvt x2 ---> d2'=d2+2*pitch
- * s2 --/ -> buf[next2[ibuf]] /
- */
- while (dy >= 2) {
- /* convert two lines into XRGB buffers: */
- (*cvt) (buf[next[ibuf]], buf[next2[ibuf]], 0, sy1, sy2, su, sv, src_x, src_dx, pcd);
- sy1 += src_pitch*2; sy2 += src_pitch*2;
- su += src_pitch/2; sv += src_pitch/2;
- /* interpolate first line: */
- (*x2) (d1, d2, dest_x, buf[ibuf], buf[next[ibuf]], 0, src_dx, pcd);
- d1 += dest_pitch*2; d2 += dest_pitch*2;
- ibuf = next[ibuf];
- /* interpolate second one: */
- (*x2) (d1, d2, dest_x, buf[ibuf], buf[next[ibuf]], 0, src_dx, pcd);
- d1 += dest_pitch*2; d2 += dest_pitch*2;
- ibuf = next[ibuf];
- dy -= 2;
- }
- /* check the # of remaining rows: */
- if (dy & 1) {
- /* convert the last odd line: */
- (*cvt) (buf[next[ibuf]], buf[next[ibuf]], 0, sy1, sy1, su, sv, src_x, src_dx, pcd);
- /* interpolate first line: */
- (*x2) (d1, d2, dest_x, buf[ibuf], buf[next[ibuf]], 0, src_dx, pcd);
- d1 += dest_pitch*2; d2 += dest_pitch*2;
- ibuf = next[ibuf];
- /* replicate the last line: */
- (*x2) (d1, d2, dest_x, buf[ibuf], buf[ibuf], 0, src_dx, pcd);
- } else {
- /* replicate the last line: */
- (*x2) (d1, d2, dest_x, buf[ibuf], buf[ibuf], 0, src_dx, pcd);
- }
- return 0;
- }
- /* check for 1/2 X scaling */
- if (scale_x == 0 && scale_y == 0) {
- /* local variables: */
- unsigned char *sy1, *sy2, *su, *sv, *d1, *d2;
- register int j;
- /* get pointers: */
- sy1 = src_ptr + (src_x + src_y * src_pitch); /* luma offset */
- sy2 = sy1 + src_pitch;
- su = src_ptr + src_height * src_pitch + (src_x/2 + src_y/2 * src_pitch);
- sv = su + src_height * src_pitch / 4;
- d1 = dest_ptr + dest_x * 2 + dest_y * dest_pitch; /* RGB offset */
- d2 = d1 + dest_pitch;
- /* convert aligned portion of the image: */
- for (j = 0; j < dest_dy>>1; j ++) {
- /* convert two lines a time: */
- halfI420toRGB565 (d1, dest_x, sy1, sy2, su, sv, src_x, src_dx, 0, pcd);
- sy1 += src_pitch*2; sy2 += src_pitch*2;
- su += src_pitch/2; sv += src_pitch/2;
- d1 += dest_pitch;
- halfI420toRGB565 (d1, dest_x, sy1, sy2, su, sv, src_x, src_dx, 1, pcd);
- sy1 += src_pitch*2; sy2 += src_pitch*2;
- su += src_pitch/2; sv += src_pitch/2;
- d1 += dest_pitch;
- }
- return 0;
- }
- /* conversion is not supported */
- return -1;
- }
- /*
- * InitI420toRGB565 initializes the minimum set of clip tables necessary to perform
- * color conversion to 16 bit RGB. The 8-bit clip table is necessary for 2x
- * interpolation.
- *
- * This routine also calls SetSrcI420Colors, which initializes color conversion tables
- * and adds color balance.
- */
- void InitI420toRGB565(float brightness, float contrast, float saturation, float hue,
- color_data_t* pcd)
- {
- InitColorData(pcd);
- SetSrcI420Colors (brightness, contrast, saturation, hue, pcd);
- }
- void UninitI420toRGB565( ){
- /* noop */
- }