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triple: add a sanity check to cVideo::GetScreenImage

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Origin commit data
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Branch: master
Commit: e6fefa10c1
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2013-01-13 (Sun, 13 Jan 2013)


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Stefan Seyfried
2013-01-13 18:11:36 +01:00
parent c4497221bb
commit 94ffffb6da
2 changed files with 8 additions and 0 deletions
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6
libtriple/video_td.cpp
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@@ -942,6 +942,12 @@ bool cVideo::GetScreenImage(unsigned char * &video, int &xres, int &yres, bool g
}
uint16_t w = *(uint16_t *)(map + WIDTH_OFF);
uint16_t h = *(uint16_t *)(map + HEIGHT_OFF);
if (w > 720 || h > 576) {
lt_info("%s: unhandled resolution %dx%d, is the tuner locked?\n", __func__, w, h);
munmap(map, VIDEO_SIZE);
close(mfd);
return false;
}
uint8_t *luma, *chroma;
int needmem = w * h * 5 / 4; /* chroma is 1/4 in size of luma */
int lumasize = w * h;