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Make Bink decoder to stop decoding planes after all bits are used. 

This prevents crashes during decoding grayscale Bink files like
samples from Impossible Creatures game demo.

Originally committed as revision 21961 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2010-02-22 12:35:12 +00:00
parent 33bc794738
commit bb29fee3a6
1 changed files with 4 additions and 1 deletions
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5
libavcodec/bink.c
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@ -681,6 +681,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
DECLARE_ALIGNED_16(DCTELEM, block[64]);
DECLARE_ALIGNED_16(uint8_t, ublock[64]);
int coordmap[64];
int bits_count = pkt->size << 3;
if(c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
@ -690,7 +691,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
return -1;
}
init_get_bits(&gb, pkt->data, pkt->size*8);
init_get_bits(&gb, pkt->data, bits_count);
if (c->version >= 'i')
skip_bits_long(&gb, 32);
@ -901,6 +902,8 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
}
if (get_bits_count(&gb) & 0x1F) //next plane data starts at 32-bit boundary
skip_bits_long(&gb, 32 - (get_bits_count(&gb) & 0x1F));
if (get_bits_count(&gb) >= bits_count)
break;
}
emms_c();