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Code class0 using aom_read() / aom_write().

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The av1_mv_class0_tree is a balanced tree with two leafs and can
 simply be coded as a boolean with probability class0[0].
If CLASS0_SIZE is ever changed from 1, this change will need to be
 reverted.

Change-Id: If294dac825a5f945371092c74aa8e3f84cd962b6
This commit is contained in:
Nathan E. Egge
2016-09-08 17:25:49 -04:00
committed by Yaowu Xu
parent 72762a2827
commit 45ea963f0b
2 changed files with 2 additions and 5 deletions
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2
av1/decoder/decodemv.c
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@@ -746,7 +746,7 @@ static int read_mv_component(aom_reader *r, const nmv_component *mvcomp,
// Integer part
if (class0) {
d = aom_read_tree(r, av1_mv_class0_tree, mvcomp->class0, ACCT_STR);
d = aom_read(r, mvcomp->class0[0], ACCT_STR);
mag = 0;
} else {
int i;

5
av1/encoder/encodemv.c
View File

@@ -23,12 +23,10 @@
static struct av1_token mv_joint_encodings[MV_JOINTS];
static struct av1_token mv_class_encodings[MV_CLASSES];
static struct av1_token mv_fp_encodings[MV_FP_SIZE];
static struct av1_token mv_class0_encodings[CLASS0_SIZE];
void av1_entropy_mv_init(void) {
av1_tokens_from_tree(mv_joint_encodings, av1_mv_joint_tree);
av1_tokens_from_tree(mv_class_encodings, av1_mv_class_tree);
av1_tokens_from_tree(mv_class0_encodings, av1_mv_class0_tree);
av1_tokens_from_tree(mv_fp_encodings, av1_mv_fp_tree);
}
@@ -53,8 +51,7 @@ static void encode_mv_component(aom_writer *w, int comp,
// Integer bits
if (mv_class == MV_CLASS_0) {
av1_write_token(w, av1_mv_class0_tree, mvcomp->class0,
&mv_class0_encodings[d]);
aom_write(w, d, mvcomp->class0[0]);
} else {
int i;
const int n = mv_class + CLASS0_BITS - 1; // number of bits