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10l, check 'i' validity before using it

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Originally committed as revision 10684 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2007-10-08 12:11:19 +00:00
parent 42d1ffa3a2
commit a417d041f0
1 changed files with 5 additions and 6 deletions
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11
libavcodec/dnxhddec.c
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@ -189,6 +189,11 @@ static void dnxhd_decode_dct_block(DNXHDContext *ctx, DCTELEM *block, int n, int
i += ctx->cid_table->run[index2]; i += ctx->cid_table->run[index2];
} }
if (i > 63) {
av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
return;
}
j = ctx->scantable.permutated[i]; j = ctx->scantable.permutated[i];
//av_log(ctx->avctx, AV_LOG_DEBUG, "j %d\n", j); //av_log(ctx->avctx, AV_LOG_DEBUG, "j %d\n", j);
//av_log(ctx->avctx, AV_LOG_DEBUG, "level %d, weigth %d\n", level, weigth_matrix[i]); //av_log(ctx->avctx, AV_LOG_DEBUG, "level %d, weigth %d\n", level, weigth_matrix[i]);
@ -197,12 +202,6 @@ static void dnxhd_decode_dct_block(DNXHDContext *ctx, DCTELEM *block, int n, int
level += 32; level += 32;
level >>= 6; level >>= 6;
level = (level^sign) - sign; level = (level^sign) - sign;
if (i > 63) {
av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
return;
}
//av_log(NULL, AV_LOG_DEBUG, "i %d, j %d, end level %d\n", i, j, level); //av_log(NULL, AV_LOG_DEBUG, "i %d, j %d, end level %d\n", i, j, level);
block[j] = level; block[j] = level;
} }