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ffmpeg/libswscale/swscale-test.c

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/*
* Copyright (C) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <stdarg.h>
#undef HAVE_AV_CONFIG_H
#include "libavutil/mem.h"
#include "libavutil/avutil.h"
#include "libavutil/pixdesc.h"
#include "libavutil/lfg.h"
#include "swscale.h"
/* HACK Duplicated from swscale_internal.h.
* Should be removed when a cleaner pixel format system exists. */
#define isGray(x) ( \
(x)==PIX_FMT_GRAY8 \
|| (x)==PIX_FMT_GRAY16BE \
|| (x)==PIX_FMT_GRAY16LE \
)
#define hasChroma(x) (!( \
isGray(x) \
|| (x)==PIX_FMT_MONOBLACK \
|| (x)==PIX_FMT_MONOWHITE \
))
#define isALPHA(x) ( \
(x)==PIX_FMT_BGR32 \
|| (x)==PIX_FMT_BGR32_1 \
|| (x)==PIX_FMT_RGB32 \
|| (x)==PIX_FMT_RGB32_1 \
|| (x)==PIX_FMT_YUVA420P \
)
static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1, int stride2, int w, int h)
{
int x,y;
uint64_t ssd=0;
//printf("%d %d\n", w, h);
for (y=0; y<h; y++) {
for (x=0; x<w; x++) {
int d= src1[x + y*stride1] - src2[x + y*stride2];
ssd+= d*d;
//printf("%d", abs(src1[x + y*stride1] - src2[x + y*stride2])/26 );
}
//printf("\n");
}
return ssd;
}
// test by ref -> src -> dst -> out & compare out against ref
// ref & out are YV12
static int doTest(uint8_t *ref[4], int refStride[4], int w, int h,
uint8_t *src[4], int srcStride[4],
enum PixelFormat srcFormat, enum PixelFormat dstFormat,
int srcW, int srcH, int dstW, int dstH, int flags)
{
uint8_t *dst[4] = {0};
uint8_t *out[4] = {0};
int dstStride[4];
int i;
uint64_t ssdY, ssdU=0, ssdV=0, ssdA=0;
struct SwsContext *dstContext = NULL, *outContext = NULL;
int res = 0;
for (i=0; i<4; i++) {
// avoid stride % bpp != 0
if (dstFormat==PIX_FMT_RGB24 || dstFormat==PIX_FMT_BGR24)
dstStride[i]= dstW*3;
else if (dstFormat==PIX_FMT_RGB48BE || dstFormat==PIX_FMT_RGB48LE)
dstStride[i]= dstW*6;
else
dstStride[i]= dstW*4;
/* Image buffers passed into libswscale can be allocated any way you
* prefer, as long as they're aligned enough for the architecture, and
* they're freed appropriately (such as using av_free for buffers
* allocated with av_malloc). */
/* An extra 16 bytes is being allocated because some scalers may write
* out of bounds. */
dst[i]= av_mallocz(dstStride[i]*dstH+16);
out[i]= av_mallocz(refStride[i]*h);
if (!dst[i] || !out[i]) {
perror("Malloc");
res = -1;
goto end;
}
}
dstContext= sws_getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat, flags, NULL, NULL, NULL);
if (!dstContext) {
fprintf(stderr, "Failed to get %s ---> %s\n",
av_pix_fmt_descriptors[srcFormat].name,
av_pix_fmt_descriptors[dstFormat].name);
res = -1;
goto end;
}
outContext= sws_getContext(dstW, dstH, dstFormat, w, h, PIX_FMT_YUVA420P, flags, NULL, NULL, NULL);
if (!outContext) {
fprintf(stderr, "Failed to get %s ---> %s\n",
av_pix_fmt_descriptors[dstFormat].name,
av_pix_fmt_descriptors[PIX_FMT_YUVA420P].name);
res = -1;
goto end;
}
// printf("test %X %X %X -> %X %X %X\n", (int)ref[0], (int)ref[1], (int)ref[2],
// (int)src[0], (int)src[1], (int)src[2]);
printf(" %s %dx%d -> %s %3dx%3d flags=%2d",
av_pix_fmt_descriptors[srcFormat].name, srcW, srcH,
av_pix_fmt_descriptors[dstFormat].name, dstW, dstH,
flags);
fflush(stdout);
sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);
sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);
ssdY= getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
if (hasChroma(srcFormat) && hasChroma(dstFormat)) {
//FIXME check that output is really gray
ssdU= getSSD(ref[1], out[1], refStride[1], refStride[1], (w+1)>>1, (h+1)>>1);
ssdV= getSSD(ref[2], out[2], refStride[2], refStride[2], (w+1)>>1, (h+1)>>1);
}
if (isALPHA(srcFormat) && isALPHA(dstFormat))
ssdA= getSSD(ref[3], out[3], refStride[3], refStride[3], w, h);
ssdY/= w*h;
ssdU/= w*h/4;
ssdV/= w*h/4;
ssdA/= w*h;
printf(" SSD=%5"PRId64",%5"PRId64",%5"PRId64",%5"PRId64"\n",
ssdY, ssdU, ssdV, ssdA);
end:
sws_freeContext(dstContext);
sws_freeContext(outContext);
for (i=0; i<4; i++) {
av_free(dst[i]);
av_free(out[i]);
}
return res;
}
static void selfTest(uint8_t *ref[4], int refStride[4], int w, int h)
{
const int flags[] = { SWS_FAST_BILINEAR,
SWS_BILINEAR, SWS_BICUBIC,
SWS_X , SWS_POINT , SWS_AREA, 0 };
const int srcW = w;
const int srcH = h;
const int dstW[] = { srcW - srcW/3, srcW, srcW + srcW/3, 0 };
const int dstH[] = { srcH - srcH/3, srcH, srcH + srcH/3, 0 };
enum PixelFormat srcFormat, dstFormat;
for (srcFormat = 0; srcFormat < PIX_FMT_NB; srcFormat++) {
if (!sws_isSupportedInput(srcFormat) || !sws_isSupportedOutput(srcFormat))
continue;
for (dstFormat = 0; dstFormat < PIX_FMT_NB; dstFormat++) {
int i, j, k;
int res = 0;
if (!sws_isSupportedInput(dstFormat) || !sws_isSupportedOutput(dstFormat))
continue;
printf("%s -> %s\n",
av_pix_fmt_descriptors[srcFormat].name,
av_pix_fmt_descriptors[dstFormat].name);
fflush(stdout);
for (k = 0; flags[k] && !res; k++) {
struct SwsContext *srcContext = NULL;
uint8_t *src[4] = {0};
int srcStride[4];
int p;
for (p = 0; p < 4; p++) {
if (srcFormat == PIX_FMT_RGB24 ||
srcFormat == PIX_FMT_BGR24)
srcStride[p] = srcW*3;
else if (srcFormat==PIX_FMT_RGB48BE ||
srcFormat==PIX_FMT_RGB48LE)
srcStride[p] = srcW*6;
else
srcStride[p] = srcW*4;
src[p] = av_mallocz(srcStride[p]*srcH+16);
if (!src[p]) {
perror("Malloc");
return;
}
}
srcContext = sws_getContext(w, h, PIX_FMT_YUVA420P, srcW, srcH,
srcFormat, flags[k], NULL, NULL, NULL);
if (!srcContext) {
fprintf(stderr, "Failed to get %s ---> %s\n",
av_pix_fmt_descriptors[PIX_FMT_YUVA420P].name,
av_pix_fmt_descriptors[srcFormat].name);
return;
}
sws_scale(srcContext, ref, refStride, 0, h, src, srcStride);
for (i = 0; dstW[i] && !res; i++)
for (j = 0; dstH[j] && !res; j++)
res = doTest(ref, refStride, w, h, src, srcStride,
srcFormat, dstFormat,
srcW, srcH, dstW[i], dstH[j], flags[k]);
sws_freeContext(srcContext);
for (p = 0; p < 4; p++)
av_free(src[p]);
}
}
}
}
#define W 96
#define H 96
int main(int argc, char **argv)
{
uint8_t *rgb_data = av_malloc (W*H*4);
uint8_t *rgb_src[3]= {rgb_data, NULL, NULL};
int rgb_stride[3]={4*W, 0, 0};
uint8_t *data = av_malloc (4*W*H);
uint8_t *src[4]= {data, data+W*H, data+W*H*2, data+W*H*3};
int stride[4]={W, W, W, W};
int x, y;
struct SwsContext *sws;
AVLFG rand;
if (!rgb_data || !data)
return -1;
sws= sws_getContext(W/12, H/12, PIX_FMT_RGB32, W, H, PIX_FMT_YUVA420P, SWS_BILINEAR, NULL, NULL, NULL);
av_lfg_init(&rand, 1);
for (y=0; y<H; y++) {
for (x=0; x<W*4; x++) {
rgb_data[ x + y*4*W]= av_lfg_get(&rand);
}
}
sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);
sws_freeContext(sws);
av_free(rgb_data);
selfTest(src, stride, W, H);
av_free(data);
return 0;
}
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