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Diffstat (limited to 'third_party/aom/aom_dsp/binary_codes_writer.c')
-rw-r--r--third_party/aom/aom_dsp/binary_codes_writer.c60
1 files changed, 57 insertions, 3 deletions
diff --git a/third_party/aom/aom_dsp/binary_codes_writer.c b/third_party/aom/aom_dsp/binary_codes_writer.c
index 91e807b29..e092b6278 100644
--- a/third_party/aom/aom_dsp/binary_codes_writer.c
+++ b/third_party/aom/aom_dsp/binary_codes_writer.c
@@ -10,6 +10,7 @@
*/
#include "aom_dsp/bitwriter.h"
+#include "aom_dsp/binary_codes_writer.h"
#include "av1/common/common.h"
@@ -68,6 +69,19 @@ void aom_write_primitive_quniform(aom_writer *w, uint16_t n, uint16_t v) {
}
}
+static void aom_wb_write_primitive_quniform(struct aom_write_bit_buffer *wb,
+ uint16_t n, uint16_t v) {
+ if (n <= 1) return;
+ const int l = get_msb(n - 1) + 1;
+ const int m = (1 << l) - n;
+ if (v < m) {
+ aom_wb_write_literal(wb, v, l - 1);
+ } else {
+ aom_wb_write_literal(wb, m + ((v - m) >> 1), l - 1);
+ aom_wb_write_bit(wb, (v - m) & 1);
+ }
+}
+
int aom_count_primitive_quniform(uint16_t n, uint16_t v) {
if (n <= 1) return 0;
const int l = get_msb(n - 1) + 1;
@@ -155,6 +169,31 @@ void aom_write_primitive_subexpfin(aom_writer *w, uint16_t n, uint16_t k,
}
}
+static void aom_wb_write_primitive_subexpfin(struct aom_write_bit_buffer *wb,
+ uint16_t n, uint16_t k,
+ uint16_t v) {
+ int i = 0;
+ int mk = 0;
+ while (1) {
+ int b = (i ? k + i - 1 : k);
+ int a = (1 << b);
+ if (n <= mk + 3 * a) {
+ aom_wb_write_primitive_quniform(wb, n - mk, v - mk);
+ break;
+ } else {
+ int t = (v >= mk + a);
+ aom_wb_write_bit(wb, t);
+ if (t) {
+ i = i + 1;
+ mk += a;
+ } else {
+ aom_wb_write_literal(wb, v - mk, b);
+ break;
+ }
+ }
+ }
+}
+
int aom_count_primitive_subexpfin(uint16_t n, uint16_t k, uint16_t v) {
int count = 0;
int i = 0;
@@ -184,19 +223,34 @@ int aom_count_primitive_subexpfin(uint16_t n, uint16_t k, uint16_t v) {
// based on a reference ref also in [0, n-1].
// Recenters symbol around r first and then uses a finite subexponential code.
void aom_write_primitive_refsubexpfin(aom_writer *w, uint16_t n, uint16_t k,
- int16_t ref, int16_t v) {
+ uint16_t ref, uint16_t v) {
aom_write_primitive_subexpfin(w, n, k, recenter_finite_nonneg(n, ref, v));
}
+static void aom_wb_write_primitive_refsubexpfin(struct aom_write_bit_buffer *wb,
+ uint16_t n, uint16_t k,
+ uint16_t ref, uint16_t v) {
+ aom_wb_write_primitive_subexpfin(wb, n, k, recenter_finite_nonneg(n, ref, v));
+}
+
void aom_write_signed_primitive_refsubexpfin(aom_writer *w, uint16_t n,
- uint16_t k, uint16_t ref,
- uint16_t v) {
+ uint16_t k, int16_t ref,
+ int16_t v) {
ref += n - 1;
v += n - 1;
const uint16_t scaled_n = (n << 1) - 1;
aom_write_primitive_refsubexpfin(w, scaled_n, k, ref, v);
}
+void aom_wb_write_signed_primitive_refsubexpfin(struct aom_write_bit_buffer *wb,
+ uint16_t n, uint16_t k,
+ int16_t ref, int16_t v) {
+ ref += n - 1;
+ v += n - 1;
+ const uint16_t scaled_n = (n << 1) - 1;
+ aom_wb_write_primitive_refsubexpfin(wb, scaled_n, k, ref, v);
+}
+
int aom_count_primitive_refsubexpfin(uint16_t n, uint16_t k, uint16_t ref,
uint16_t v) {
return aom_count_primitive_subexpfin(n, k, recenter_finite_nonneg(n, ref, v));