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Code Issues Releases Activity

avformat/img2_alias_pix: rewrite probe function

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Fixes probetest failure

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-03-29 00:16:43 +01:00
parent 2cffdcbdd7
commit 657cee1aef
1 changed files with 22 additions and 8 deletions
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30
libavformat/img2_alias_pix.c
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@ -20,23 +20,37 @@
*/ */
#include "img2.h" #include "img2.h"
#include "libavutil/intreadwrite.h" #include "libavcodec/bytestream.h"
static int brender_read_probe(AVProbeData *p) static int brender_read_probe(AVProbeData *p)
{ {
int width = AV_RB16(p->buf); const uint8_t *b = p->buf;
int height = AV_RB16(p->buf+2); const uint8_t *end = b + p->buf_size;
int ox = AV_RB16(p->buf+4); int width = bytestream_get_be16(&b);
int oy = AV_RB16(p->buf+6); int height = bytestream_get_be16(&b);
int bpp = AV_RB16(p->buf+8); int ox = bytestream_get_be16(&b);
int count = p->buf[10]; int oy = bytestream_get_be16(&b);
int bpp = bytestream_get_be16(&b);
int x, y;
if (!count || !height || count > width) if (!width || !height)
return 0; return 0;
if (bpp != 24 && bpp != 8) if (bpp != 24 && bpp != 8)
return 0; return 0;
for (y=0; y<2 && y<height; y++) {
for (x=0; x<width; ) {
int count = *b++;
if (count == 0 || x + count > width)
return 0;
if (b > end)
return AVPROBE_SCORE_MAX / 8;
b += bpp / 8;
x += count;
}
}
return AVPROBE_SCORE_EXTENSION + 1; return AVPROBE_SCORE_EXTENSION + 1;
} }