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https://git.ffmpeg.org/ffmpeg.git
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549 lines
16 KiB
C
549 lines
16 KiB
C
/*
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* Misc image convertion routines
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* Copyright (c) 2001 Gerard Lantau.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "avcodec.h"
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#include "dsputil.h"
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#ifdef USE_FASTMEMCPY
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#include "fastmemcpy.h"
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#endif
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/* XXX: totally non optimized */
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static void yuv422_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
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UINT8 *src, int width, int height)
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{
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int x, y;
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UINT8 *p = src;
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for(y=0;y<height;y+=2) {
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for(x=0;x<width;x+=2) {
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lum[0] = p[0];
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cb[0] = p[1];
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lum[1] = p[2];
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cr[0] = p[3];
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p += 4;
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lum += 2;
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cb++;
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cr++;
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}
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for(x=0;x<width;x+=2) {
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lum[0] = p[0];
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lum[1] = p[2];
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p += 4;
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lum += 2;
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}
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}
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}
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#define SCALEBITS 8
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#define ONE_HALF (1 << (SCALEBITS - 1))
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#define FIX(x) ((int) ((x) * (1L<<SCALEBITS) + 0.5))
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static void rgb24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
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UINT8 *src, int width, int height)
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{
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int wrap, wrap3, x, y;
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int r, g, b, r1, g1, b1;
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UINT8 *p;
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wrap = width;
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wrap3 = width * 3;
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p = src;
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for(y=0;y<height;y+=2) {
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for(x=0;x<width;x+=2) {
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r = p[0];
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g = p[1];
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b = p[2];
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r1 = r;
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g1 = g;
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b1 = b;
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lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
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r = p[3];
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g = p[4];
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b = p[5];
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r1 += r;
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g1 += g;
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b1 += b;
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lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
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p += wrap3;
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lum += wrap;
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r = p[0];
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g = p[1];
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b = p[2];
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r1 += r;
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g1 += g;
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b1 += b;
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lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
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r = p[3];
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g = p[4];
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b = p[5];
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r1 += r;
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g1 += g;
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b1 += b;
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lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
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cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +
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FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
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cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 -
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FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
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cb++;
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cr++;
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p += -wrap3 + 2 * 3;
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lum += -wrap + 2;
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}
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p += wrap3;
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lum += wrap;
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}
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}
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static void bgr24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
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UINT8 *src, int width, int height)
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{
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int wrap, wrap3, x, y;
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int r, g, b, r1, g1, b1;
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UINT8 *p;
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wrap = width;
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wrap3 = width * 3;
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p = src;
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for(y=0;y<height;y+=2) {
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for(x=0;x<width;x+=2) {
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b = p[0];
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g = p[1];
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r = p[2];
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r1 = r;
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g1 = g;
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b1 = b;
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lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
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b = p[3];
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g = p[4];
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r = p[5];
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r1 += r;
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g1 += g;
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b1 += b;
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lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
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p += wrap3;
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lum += wrap;
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b = p[0];
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g = p[1];
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r = p[2];
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r1 += r;
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g1 += g;
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b1 += b;
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lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
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b = p[3];
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g = p[4];
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r = p[5];
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r1 += r;
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g1 += g;
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b1 += b;
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lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
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FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
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cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +
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FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
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cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 -
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FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
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cb++;
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cr++;
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p += -wrap3 + 2 * 3;
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lum += -wrap + 2;
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}
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p += wrap3;
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lum += wrap;
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}
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}
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/* XXX: use generic filter ? */
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/* 1x2 -> 1x1 */
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static void shrink2(UINT8 *dst, int dst_wrap,
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UINT8 *src, int src_wrap,
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int width, int height)
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{
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int w;
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UINT8 *s1, *s2, *d;
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for(;height > 0; height--) {
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s1 = src;
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s2 = s1 + src_wrap;
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d = dst;
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for(w = width;w >= 4; w-=4) {
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d[0] = (s1[0] + s2[0]) >> 1;
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d[1] = (s1[1] + s2[1]) >> 1;
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d[2] = (s1[2] + s2[2]) >> 1;
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d[3] = (s1[3] + s2[3]) >> 1;
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s1 += 4;
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s2 += 4;
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d += 4;
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}
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for(;w > 0; w--) {
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d[0] = (s1[0] + s2[0]) >> 1;
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s1++;
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s2++;
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d++;
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}
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src += 2 * src_wrap;
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dst += dst_wrap;
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}
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}
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/* 2x2 -> 1x1 */
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static void shrink22(UINT8 *dst, int dst_wrap,
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UINT8 *src, int src_wrap,
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int width, int height)
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{
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int w;
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UINT8 *s1, *s2, *d;
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for(;height > 0; height--) {
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s1 = src;
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s2 = s1 + src_wrap;
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d = dst;
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for(w = width;w >= 4; w-=4) {
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d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 1;
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d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 1;
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d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 1;
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d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 1;
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s1 += 8;
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s2 += 8;
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d += 4;
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}
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for(;w > 0; w--) {
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d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 1;
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s1 += 2;
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s2 += 2;
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d++;
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}
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src += 2 * src_wrap;
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dst += dst_wrap;
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}
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}
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static void img_copy(UINT8 *dst, int dst_wrap,
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UINT8 *src, int src_wrap,
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int width, int height)
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{
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for(;height > 0; height--) {
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memcpy(dst, src, width);
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dst += dst_wrap;
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src += src_wrap;
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}
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}
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#define SCALE_BITS 10
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#define C_Y (76309 >> (16 - SCALE_BITS))
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#define C_RV (117504 >> (16 - SCALE_BITS))
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#define C_BU (138453 >> (16 - SCALE_BITS))
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#define C_GU (13954 >> (16 - SCALE_BITS))
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#define C_GV (34903 >> (16 - SCALE_BITS))
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#define RGBOUT(r, g, b, y1)\
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{\
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y = (y1 - 16) * C_Y;\
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r = cm[(y + r_add) >> SCALE_BITS];\
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g = cm[(y + g_add) >> SCALE_BITS];\
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b = cm[(y + b_add) >> SCALE_BITS];\
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}
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/* XXX: no chroma interpolating is done */
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static void yuv420p_to_rgb24(AVPicture *dst, AVPicture *src,
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int width, int height)
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{
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UINT8 *y1_ptr, *y2_ptr, *cb_ptr, *cr_ptr, *d, *d1, *d2;
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int w, y, cb, cr, r_add, g_add, b_add, width2;
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UINT8 *cm = cropTbl + MAX_NEG_CROP;
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d = dst->data[0];
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y1_ptr = src->data[0];
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cb_ptr = src->data[1];
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cr_ptr = src->data[2];
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width2 = width >> 1;
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for(;height > 0; height -= 2) {
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d1 = d;
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d2 = d + dst->linesize[0];
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y2_ptr = y1_ptr + src->linesize[0];
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for(w = width2; w > 0; w --) {
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cb = cb_ptr[0] - 128;
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cr = cr_ptr[0] - 128;
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r_add = C_RV * cr + (1 << (SCALE_BITS - 1));
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g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));
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b_add = C_BU * cb + (1 << (SCALE_BITS - 1));
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/* output 4 pixels */
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RGBOUT(d1[0], d1[1], d1[2], y1_ptr[0]);
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RGBOUT(d1[3], d1[4], d1[5], y1_ptr[1]);
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RGBOUT(d2[0], d2[1], d2[2], y2_ptr[0]);
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RGBOUT(d2[3], d2[4], d2[5], y2_ptr[1]);
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d1 += 6;
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d2 += 6;
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y1_ptr += 2;
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y2_ptr += 2;
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cb_ptr++;
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cr_ptr++;
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}
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d += 2 * dst->linesize[0];
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y1_ptr += 2 * src->linesize[0] - width;
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cb_ptr += src->linesize[1] - width2;
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cr_ptr += src->linesize[2] - width2;
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}
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}
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/* XXX: no chroma interpolating is done */
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static void yuv422p_to_rgb24(AVPicture *dst, AVPicture *src,
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int width, int height)
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{
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UINT8 *y1_ptr, *cb_ptr, *cr_ptr, *d, *d1;
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int w, y, cb, cr, r_add, g_add, b_add, width2;
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UINT8 *cm = cropTbl + MAX_NEG_CROP;
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d = dst->data[0];
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y1_ptr = src->data[0];
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cb_ptr = src->data[1];
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cr_ptr = src->data[2];
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width2 = width >> 1;
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for(;height > 0; height --) {
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d1 = d;
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for(w = width2; w > 0; w --) {
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cb = cb_ptr[0] - 128;
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cr = cr_ptr[0] - 128;
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r_add = C_RV * cr + (1 << (SCALE_BITS - 1));
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g_add = - C_GU * cb - C_GV * cr + (1 << (SCALE_BITS - 1));
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b_add = C_BU * cb + (1 << (SCALE_BITS - 1));
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/* output 2 pixels */
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RGBOUT(d1[0], d1[1], d1[2], y1_ptr[0]);
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RGBOUT(d1[3], d1[4], d1[5], y1_ptr[1]);
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d1 += 6;
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y1_ptr += 2;
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cb_ptr++;
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cr_ptr++;
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}
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d += dst->linesize[0];
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y1_ptr += src->linesize[0] - width;
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cb_ptr += src->linesize[1] - width2;
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cr_ptr += src->linesize[2] - width2;
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}
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}
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/* XXX: always use linesize. Return -1 if not supported */
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int img_convert(AVPicture *dst, int dst_pix_fmt,
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AVPicture *src, int pix_fmt,
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int width, int height)
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{
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int i;
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if (dst_pix_fmt == pix_fmt) {
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switch(pix_fmt) {
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case PIX_FMT_YUV420P:
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for(i=0;i<3;i++) {
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if (i == 1) {
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width >>= 1;
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height >>= 1;
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}
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img_copy(dst->data[i], dst->linesize[i],
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src->data[i], src->linesize[i],
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width, height);
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}
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break;
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default:
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return -1;
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}
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} else if (dst_pix_fmt == PIX_FMT_YUV420P) {
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switch(pix_fmt) {
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case PIX_FMT_YUV420P:
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for(i=0;i<3;i++) {
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img_copy(dst->data[i], dst->linesize[i],
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src->data[i], src->linesize[i],
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width, height);
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}
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break;
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case PIX_FMT_YUV422P:
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img_copy(dst->data[0], dst->linesize[0],
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src->data[0], src->linesize[0],
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width, height);
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width >>= 1;
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height >>= 1;
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for(i=1;i<3;i++) {
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shrink2(dst->data[i], dst->linesize[i],
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src->data[i], src->linesize[i],
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width, height);
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}
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break;
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case PIX_FMT_YUV444P:
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img_copy(dst->data[0], dst->linesize[0],
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src->data[0], src->linesize[0],
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width, height);
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width >>= 1;
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height >>= 1;
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for(i=1;i<3;i++) {
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shrink22(dst->data[i], dst->linesize[i],
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src->data[i], src->linesize[i],
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width, height);
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}
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break;
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case PIX_FMT_YUV422:
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yuv422_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
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src->data[0], width, height);
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break;
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case PIX_FMT_RGB24:
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rgb24_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
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src->data[0], width, height);
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break;
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case PIX_FMT_BGR24:
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bgr24_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
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src->data[0], width, height);
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break;
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default:
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return -1;
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}
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} else if (dst_pix_fmt == PIX_FMT_RGB24) {
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switch(pix_fmt) {
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case PIX_FMT_YUV420P:
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yuv420p_to_rgb24(dst, src, width, height);
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break;
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case PIX_FMT_YUV422P:
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yuv422p_to_rgb24(dst, src, width, height);
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break;
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default:
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return -1;
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}
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} else {
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return -1;
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}
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return 0;
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}
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/* filter parameters: [-1 4 2 4 -1] // 8 */
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static void deinterlace_line(UINT8 *dst, UINT8 *src, int src_wrap,
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int size)
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{
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UINT8 *cm = cropTbl + MAX_NEG_CROP;
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int sum;
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UINT8 *s;
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for(;size > 0;size--) {
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s = src;
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sum = -s[0];
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s += src_wrap;
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sum += s[0] << 2;
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s += src_wrap;
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sum += s[0] << 1;
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s += src_wrap;
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sum += s[0] << 2;
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s += src_wrap;
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sum += -s[0];
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dst[0] = cm[(sum + 4) >> 3];
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dst++;
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src++;
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}
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}
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/* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
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top field is copied as is, but the bottom field is deinterlaced
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against the top field. */
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static void deinterlace_bottom_field(UINT8 *dst, int dst_wrap,
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UINT8 *src1, int src_wrap,
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int width, int height)
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{
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UINT8 *src, *ptr;
|
|
int y, y1, i;
|
|
UINT8 *buf;
|
|
|
|
buf= (UINT8*) malloc(5 * width);
|
|
|
|
src = src1;
|
|
for(y=0;y<height;y+=2) {
|
|
/* copy top field line */
|
|
memcpy(dst, src, width);
|
|
dst += dst_wrap;
|
|
src += (1 - 2) * src_wrap;
|
|
y1 = y - 2;
|
|
if (y1 >= 0 && (y1 + 4) < height) {
|
|
/* fast case : no edges */
|
|
deinterlace_line(dst, src, src_wrap, width);
|
|
} else {
|
|
/* in order to use the same function, we use an intermediate buffer */
|
|
ptr = buf;
|
|
for(i=0;i<5;i++) {
|
|
if (y1 < 0)
|
|
memcpy(ptr, src1, width);
|
|
else if (y1 >= height)
|
|
memcpy(ptr, src1 + (height - 1) * src_wrap, width);
|
|
else
|
|
memcpy(ptr, src1 + y1 * src_wrap, width);
|
|
y1++;
|
|
ptr += width;
|
|
}
|
|
deinterlace_line(dst, buf, width, width);
|
|
}
|
|
dst += dst_wrap;
|
|
src += (2 + 1) * src_wrap;
|
|
}
|
|
free(buf);
|
|
}
|
|
|
|
|
|
/* deinterlace, return -1 if format not handled */
|
|
int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
|
|
int pix_fmt, int width, int height)
|
|
{
|
|
int i;
|
|
|
|
if (pix_fmt != PIX_FMT_YUV420P &&
|
|
pix_fmt != PIX_FMT_YUV422P &&
|
|
pix_fmt != PIX_FMT_YUV444P)
|
|
return -1;
|
|
if ((width & 1) != 0 || (height & 3) != 0)
|
|
return -1;
|
|
|
|
for(i=0;i<3;i++) {
|
|
if (i == 1) {
|
|
switch(pix_fmt) {
|
|
case PIX_FMT_YUV420P:
|
|
width >>= 1;
|
|
height >>= 1;
|
|
break;
|
|
case PIX_FMT_YUV422P:
|
|
width >>= 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
deinterlace_bottom_field(dst->data[i], dst->linesize[i],
|
|
src->data[i], src->linesize[i],
|
|
width, height);
|
|
}
|
|
return 0;
|
|
}
|