hevc/rext: add support for Range extension tools

SPS features/flags:
- transform_skip_rotation_enabled_flag
- transform_skip_context_enabled_flag
- implicit_rdpcm_enabled_flag
- explicit_rdpcm_enabled_flag
- intra_smoothing_disabled_flag
- persistent_rice_adaptation_enabled_flag

PPS features/flags:
- log2_max_transform_skip_block_size
- cross_component_prediction_enabled_flag
- chroma_qp_offset_list_enabled_flag
- diff_cu_chroma_qp_offset_depth
- chroma_qp_offset_list_len_minus1
- cb_qp_offset_list
- cr_qp_offset_list
- log2_sao_offset_scale_luma
- log2_sao_offset_scale_chroma
(cherry picked from commit 005294c5b939a23099871c6130c8a7cc331f73ee)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 23 insertions, 0 deletions

diff --git a/libavcodec/hevcdsp_template.c b/libavcodec/hevcdsp_template.c
index cceba2453d..f0bb256b4b 100644
--- a/libavcodec/hevcdsp_template.c
+++ b/libavcodec/hevcdsp_template.c
@@ -110,6 +110,29 @@ static void FUNC(transform_add32x32)(uint8_t *_dst, int16_t *coeffs,
     }
 }
 
+
+static void FUNC(transform_rdpcm)(int16_t *_coeffs, int16_t log2_size, int mode)
+{
+    int16_t *coeffs = (int16_t *) _coeffs;
+    int x, y;
+    int size = 1 << log2_size;
+
+    if (mode) {
+        coeffs += size;
+        for (y = 0; y < size - 1; y++) {
+            for (x = 0; x < size; x++)
+                coeffs[x] += coeffs[x - size];
+            coeffs += size;
+        }
+    } else {
+        for (y = 0; y < size; y++) {
+            for (x = 1; x < size; x++)
+                coeffs[x] += coeffs[x - 1];
+            coeffs += size;
+        }
+    }
+}
+
 static void FUNC(transform_skip)(int16_t *_coeffs, int16_t log2_size)
 {
     int shift  = 15 - BIT_DEPTH - log2_size;