[FFmpeg-devel] [PATCH 3/3] avcodec/hevc_ps: use get_ue_golomb() for some PPS multilayer extension fields

[James Almer]

Also remove the _plus* and _minus* parts of some of these to be in line with
other similar fields in the decoder.

Signed-off-by: James Almer <jamrial at gmail.com>
---
 libavcodec/hevc_ps.c | 27 +++++++++++++--------------
 libavcodec/hevc_ps.h | 18 +++++++++---------
 2 files changed, 22 insertions(+), 23 deletions(-)

diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c
index 69d5504ce1..7401ea23f5 100644
--- a/libavcodec/hevc_ps.c
+++ b/libavcodec/hevc_ps.c
@@ -1324,7 +1324,7 @@ static void colour_mapping_octants(GetBitContext *gb, HEVCPPS *pps, int inp_dept
                                    int idx_y, int idx_cb, int idx_cr, int inp_length)
 {
     unsigned int split_octant_flag, part_num_y, coded_res_flag, res_coeff_q, res_coeff_r;
-    int bit_depth_cm_input_y, bit_depth_cm_output_y, cm_res_bits;
+    int cm_res_bits;
 
     part_num_y = 1 << pps->cm_y_part_num_log2;
 
@@ -1346,10 +1346,9 @@ static void colour_mapping_octants(GetBitContext *gb, HEVCPPS *pps, int inp_dept
                 if (coded_res_flag)
                     for (int c = 0; c < 3; c++) {
                         res_coeff_q = get_ue_golomb_long(gb);
-                        bit_depth_cm_input_y = 8 + pps->luma_bit_depth_cm_input_minus8;
-                        bit_depth_cm_output_y = 8 + pps->luma_bit_depth_cm_output_minus8;
-                        cm_res_bits = FFMAX(0, 10 + bit_depth_cm_input_y - bit_depth_cm_output_y -
-                                            pps->cm_res_quant_bits - (pps->cm_delta_flc_bits_minus1 + 1));
+                        cm_res_bits = FFMAX(0, 10 + pps->luma_bit_depth_cm_input -
+                                            pps->luma_bit_depth_cm_output -
+                                            pps->cm_res_quant_bits - pps->cm_delta_flc_bits);
                         res_coeff_r = cm_res_bits ? get_bits(gb, cm_res_bits) : 0;
                         if (res_coeff_q || res_coeff_r)
                             skip_bits1(gb);
@@ -1367,13 +1366,13 @@ static void colour_mapping_table(GetBitContext *gb, HEVCPPS *pps)
     pps->cm_octant_depth = get_bits(gb, 2);
     pps->cm_y_part_num_log2 = get_bits(gb, 2);
 
-    pps->luma_bit_depth_cm_input_minus8    = get_ue_golomb_long(gb);
-    pps->chroma_bit_depth_cm_input_minus8  = get_ue_golomb_long(gb);
-    pps->luma_bit_depth_cm_output_minus8   = get_ue_golomb_long(gb);
-    pps->chroma_bit_depth_cm_output_minus8 = get_ue_golomb_long(gb);
+    pps->luma_bit_depth_cm_input    = get_ue_golomb(gb) + 8;
+    pps->chroma_bit_depth_cm_input  = get_ue_golomb(gb) + 8;
+    pps->luma_bit_depth_cm_output   = get_ue_golomb(gb) + 8;
+    pps->chroma_bit_depth_cm_output = get_ue_golomb(gb) + 8;
 
     pps->cm_res_quant_bits = get_bits(gb, 2);
-    pps->cm_delta_flc_bits_minus1 = get_bits(gb, 2);
+    pps->cm_delta_flc_bits = get_bits(gb, 2) + 1;
 
     if (pps->cm_octant_depth == 1) {
         pps->cm_adapt_threshold_u_delta = get_se_golomb_long(gb);
@@ -1415,10 +1414,10 @@ static int pps_multilayer_extension(GetBitContext *gb, AVCodecContext *avctx,
 
         pps->resample_phase_set_present_flag[i] = get_bits1(gb);
         if (pps->resample_phase_set_present_flag[i]) {
-            pps->phase_hor_luma[pps->ref_loc_offset_layer_id[i]]         = get_ue_golomb_long(gb);
-            pps->phase_ver_luma[pps->ref_loc_offset_layer_id[i]]         = get_ue_golomb_long(gb);
-            pps->phase_hor_chroma_plus8[pps->ref_loc_offset_layer_id[i]] = get_ue_golomb_long(gb);
-            pps->phase_ver_chroma_plus8[pps->ref_loc_offset_layer_id[i]] = get_ue_golomb_long(gb);
+            pps->phase_hor_luma[pps->ref_loc_offset_layer_id[i]]   = get_ue_golomb_31(gb);
+            pps->phase_ver_luma[pps->ref_loc_offset_layer_id[i]]   = get_ue_golomb_31(gb);
+            pps->phase_hor_chroma[pps->ref_loc_offset_layer_id[i]] = get_ue_golomb(gb) - 8;
+            pps->phase_ver_chroma[pps->ref_loc_offset_layer_id[i]] = get_ue_golomb(gb) - 8;
         }
     }
 
diff --git a/libavcodec/hevc_ps.h b/libavcodec/hevc_ps.h
index 5a80cf5d80..0c9c278662 100644
--- a/libavcodec/hevc_ps.h
+++ b/libavcodec/hevc_ps.h
@@ -327,21 +327,21 @@ typedef struct HEVCPPS {
     int16_t ref_region_right_offset[64];
     int16_t ref_region_bottom_offset[64];
     uint8_t resample_phase_set_present_flag[64];
-    uint16_t phase_hor_luma[64];
-    uint16_t phase_ver_luma[64];
-    uint16_t phase_hor_chroma_plus8[64];
-    uint16_t phase_ver_chroma_plus8[64];
+    uint8_t phase_hor_luma[64];
+    uint8_t phase_ver_luma[64];
+    int8_t phase_hor_chroma[64];
+    int8_t phase_ver_chroma[64];
     uint8_t colour_mapping_enabled_flag;
     uint16_t num_cm_ref_layers_minus1;
     uint8_t cm_ref_layer_id[63];
     uint8_t cm_octant_depth;
     uint8_t cm_y_part_num_log2;
-    uint16_t luma_bit_depth_cm_input_minus8;
-    uint16_t chroma_bit_depth_cm_input_minus8;
-    uint16_t luma_bit_depth_cm_output_minus8;
-    uint16_t chroma_bit_depth_cm_output_minus8;
+    uint8_t luma_bit_depth_cm_input;
+    uint8_t chroma_bit_depth_cm_input;
+    uint8_t luma_bit_depth_cm_output;
+    uint8_t chroma_bit_depth_cm_output;
     uint8_t cm_res_quant_bits;
-    uint8_t cm_delta_flc_bits_minus1;
+    uint8_t cm_delta_flc_bits;
     int8_t cm_adapt_threshold_u_delta;
     int8_t cm_adapt_threshold_v_delta;
 
-- 
2.40.0