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67e1d52783
FFmpeg/libswscale/swscale-test.c
Ramiro Polla 67e1d52783 swscale-test: allocate more memory to prevent scalers from writing out of bounds 
Some converters (ie. unscaled rgb24 -> argb) may write some bytes out of
bounds. Ideally the converters should be fixed, but in the meantime we allocate
more memory to prevent heap corruption.

Originally committed as revision 31768 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
2010-07-22 15:30:22 +00:00

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8.5 KiB
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,
enum PixelFormat srcFormat, enum PixelFormat dstFormat,
int srcW, int srcH, int dstW, int dstH, int flags)
{
uint8_t *src[4] = {0};
uint8_t *dst[4] = {0};
uint8_t *out[4] = {0};
int srcStride[4], dstStride[4];
int i;
uint64_t ssdY, ssdU=0, ssdV=0, ssdA=0;
struct SwsContext *srcContext = NULL, *dstContext = NULL,
*outContext = NULL;
int res;
res = 0;
for (i=0; i<4; i++) {
// avoid stride % bpp != 0
if (srcFormat==PIX_FMT_RGB24 || srcFormat==PIX_FMT_BGR24)
srcStride[i]= srcW*3;
else if (srcFormat==PIX_FMT_RGB48BE || srcFormat==PIX_FMT_RGB48LE)
srcStride[i]= srcW*6;
else
srcStride[i]= srcW*4;
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. */
src[i]= av_mallocz(srcStride[i]*srcH+16);
dst[i]= av_mallocz(dstStride[i]*dstH+16);
out[i]= av_mallocz(refStride[i]*h);
if (!src[i] || !dst[i] || !out[i]) {
perror("Malloc");
res = -1;
goto end;
}
}
srcContext= sws_getContext(w, h, PIX_FMT_YUVA420P, srcW, srcH, srcFormat, flags, 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);
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]);
sws_scale(srcContext, ref, refStride, 0, h , src, srcStride);
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(" %s %dx%d -> %s %4dx%4d flags=%2d SSD=%5"PRId64",%5"PRId64",%5"PRId64",%5"PRId64"\n",
av_pix_fmt_descriptors[srcFormat].name, srcW, srcH,
av_pix_fmt_descriptors[dstFormat].name, dstW, dstH,
flags, ssdY, ssdU, ssdV, ssdA);
fflush(stdout);
end:
sws_freeContext(srcContext);
sws_freeContext(dstContext);
sws_freeContext(outContext);
for (i=0; i<4; i++) {
av_free(src[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 (i = 0; dstW[i] && !res; i++)
for (j = 0; dstH[j] && !res; j++)
for (k = 0; flags[k] && !res; k++)
res = doTest(ref, refStride, w, h, srcFormat, dstFormat,
srcW, srcH, dstW[i], dstH[j], flags[k]);
}
}
}
#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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