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Reallocate internal buffer when coded frame size changes.

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Fixes out-of-bounds reads and writes with i32/smclocki32.avi.1.0 from issue 1240.

Originally committed as revision 19359 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2009-07-06 16:48:23 +00:00
parent 28bcc76ab7
commit 16c8318513
1 changed files with 12 additions and 0 deletions
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12
libavcodec/indeo3.c
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@ -107,6 +107,7 @@ static av_cold int iv_alloc_frames(Indeo3DecodeContext *s)
unsigned int bufsize = luma_pixels * 2 + luma_width * 3 +
(chroma_pixels + chroma_width) * 4;
av_freep(&s->buf);
if(!(s->buf = av_malloc(bufsize)))
return AVERROR(ENOMEM);
s->iv_frame[0].y_w = s->iv_frame[1].y_w = luma_width;
@ -997,6 +998,17 @@ static int iv_decode_frame(AVCodecContext *avctx,
if(avcodec_check_dimensions(avctx, image_width, image_height))
return -1;
if (image_width != avctx->width || image_height != avctx->height) {
int ret;
avcodec_set_dimensions(avctx, image_width, image_height);
s->width = avctx->width;
s->height = avctx->height;
ret = iv_alloc_frames(s);
if (ret < 0) {
s->width = s->height = 0;
return ret;
}
}
chroma_height = ((image_height >> 2) + 3) & 0x7ffc;
chroma_width = ((image_width >> 2) + 3) & 0x7ffc;