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-rw-r--r--libavcodec/dsputil.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index e568bcc106..7fdf0decd5 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -1627,9 +1627,11 @@ static int sad8x8_c(void *s, uint8_t *a, uint8_t *b, int stride){
/**
* permutes an 8x8 block.
- * @param block the block :)
+ * @param block the block which will be permuted according to the given permutation vector
* @param permutation the permutation vector
* @param last the last non zero coefficient in scantable order, used to speed the permutation up
+ * @param scantable the used scantable, this is only used to speed the permutation up, the block is not
+ * (inverse) permutated to scantable order!
*/
void ff_block_permute(DCTELEM *block, uint8_t *permutation, const uint8_t *scantable, int last)
{
@@ -1652,6 +1654,9 @@ void ff_block_permute(DCTELEM *block, uint8_t *permutation, const uint8_t *scant
}
}
+/**
+ * memset(blocks, 0, sizeof(DCTELEM)*6*64)
+ */
static void clear_blocks_c(DCTELEM *blocks)
{
memset(blocks, 0, sizeof(DCTELEM)*6*64);