]> git.sesse.net Git - ffmpeg/blobdiff - libavcodec/cbs_h265_syntax_template.c
avcodec.h: split AVCodec API into its own header
[ffmpeg] / libavcodec / cbs_h265_syntax_template.c
index d4e4f7b1c245918a62e80bd479f207ea45abacd3..5b7d1aa837c510505fc3ba86dc6f0997c47a33e4 100644 (file)
@@ -33,13 +33,13 @@ static int FUNC(nal_unit_header)(CodedBitstreamContext *ctx, RWContext *rw,
 {
     int err;
 
-    u(1, forbidden_zero_bit, 0, 0);
+    fixed(1, forbidden_zero_bit, 0);
 
     if (expected_nal_unit_type >= 0)
         u(6, nal_unit_type, expected_nal_unit_type,
                             expected_nal_unit_type);
     else
-        u(6, nal_unit_type, 0, 63);
+        ub(6, nal_unit_type);
 
     u(6, nuh_layer_id,          0, 62);
     u(3, nuh_temporal_id_plus1, 1,  7);
@@ -59,7 +59,7 @@ static int FUNC(byte_alignment)(CodedBitstreamContext *ctx, RWContext *rw)
 }
 
 static int FUNC(extension_data)(CodedBitstreamContext *ctx, RWContext *rw,
-                                H265RawPSExtensionData *current)
+                                H265RawExtensionData *current)
 {
     int err;
     size_t k;
@@ -80,7 +80,7 @@ static int FUNC(extension_data)(CodedBitstreamContext *ctx, RWContext *rw,
     }
 #else
     for (k = 0; k < current->bit_length; k++)
-        xu(1, extension_data, current->data[k / 8] >> (7 - k % 8), 0, 1, 0);
+        xu(1, extension_data, current->data[k / 8] >> (7 - k % 8) & 1, 0, 1, 0);
 #endif
     return 0;
 }
@@ -95,7 +95,7 @@ static int FUNC(profile_tier_level)(CodedBitstreamContext *ctx, RWContext *rw,
     if (profile_present_flag) {
         u(2, general_profile_space, 0, 0);
         flag(general_tier_flag);
-        u(5, general_profile_idc, 0, 31);
+        ub(5, general_profile_idc);
 
         for (j = 0; j < 32; j++)
             flags(general_profile_compatibility_flag[j], 1, j);
@@ -130,6 +130,11 @@ static int FUNC(profile_tier_level)(CodedBitstreamContext *ctx, RWContext *rw,
                 fixed(24, general_reserved_zero_34bits, 0);
                 fixed(10, general_reserved_zero_34bits, 0);
             }
+        } else if (profile_compatible(2)) {
+            fixed(7, general_reserved_zero_7bits, 0);
+            flag(general_one_picture_only_constraint_flag);
+            fixed(24, general_reserved_zero_35bits, 0);
+            fixed(11, general_reserved_zero_35bits, 0);
         } else {
             fixed(24, general_reserved_zero_43bits, 0);
             fixed(19, general_reserved_zero_43bits, 0);
@@ -145,7 +150,7 @@ static int FUNC(profile_tier_level)(CodedBitstreamContext *ctx, RWContext *rw,
 #undef profile_compatible
     }
 
-    u(8, general_level_idc, 0, 255);
+    ub(8, general_level_idc);
 
     for (i = 0; i < max_num_sub_layers_minus1; i++) {
         flags(sub_layer_profile_present_flag[i], 1, i);
@@ -158,10 +163,64 @@ static int FUNC(profile_tier_level)(CodedBitstreamContext *ctx, RWContext *rw,
     }
 
     for (i = 0; i < max_num_sub_layers_minus1; i++) {
-        if (current->sub_layer_profile_present_flag[i])
-            return AVERROR_PATCHWELCOME;
+        if (current->sub_layer_profile_present_flag[i]) {
+            us(2, sub_layer_profile_space[i], 0, 0, 1, i);
+            flags(sub_layer_tier_flag[i],           1, i);
+            ubs(5, sub_layer_profile_idc[i], 1, i);
+
+            for (j = 0; j < 32; j++)
+                flags(sub_layer_profile_compatibility_flag[i][j], 2, i, j);
+
+            flags(sub_layer_progressive_source_flag[i],    1, i);
+            flags(sub_layer_interlaced_source_flag[i],     1, i);
+            flags(sub_layer_non_packed_constraint_flag[i], 1, i);
+            flags(sub_layer_frame_only_constraint_flag[i], 1, i);
+
+#define profile_compatible(x) (current->sub_layer_profile_idc[i] == (x) ||   \
+                               current->sub_layer_profile_compatibility_flag[i][x])
+            if (profile_compatible(4) || profile_compatible(5) ||
+                profile_compatible(6) || profile_compatible(7) ||
+                profile_compatible(8) || profile_compatible(9) ||
+                profile_compatible(10)) {
+                flags(sub_layer_max_12bit_constraint_flag[i],        1, i);
+                flags(sub_layer_max_10bit_constraint_flag[i],        1, i);
+                flags(sub_layer_max_8bit_constraint_flag[i],         1, i);
+                flags(sub_layer_max_422chroma_constraint_flag[i],    1, i);
+                flags(sub_layer_max_420chroma_constraint_flag[i],    1, i);
+                flags(sub_layer_max_monochrome_constraint_flag[i],   1, i);
+                flags(sub_layer_intra_constraint_flag[i],            1, i);
+                flags(sub_layer_one_picture_only_constraint_flag[i], 1, i);
+                flags(sub_layer_lower_bit_rate_constraint_flag[i],   1, i);
+
+                if (profile_compatible(5)) {
+                    flags(sub_layer_max_14bit_constraint_flag[i], 1, i);
+                    fixed(24, sub_layer_reserved_zero_33bits, 0);
+                    fixed( 9, sub_layer_reserved_zero_33bits, 0);
+                } else {
+                    fixed(24, sub_layer_reserved_zero_34bits, 0);
+                    fixed(10, sub_layer_reserved_zero_34bits, 0);
+                }
+            } else if (profile_compatible(2)) {
+                fixed(7, sub_layer_reserved_zero_7bits, 0);
+                flags(sub_layer_one_picture_only_constraint_flag[i], 1, i);
+                fixed(24, sub_layer_reserved_zero_43bits, 0);
+                fixed(11, sub_layer_reserved_zero_43bits, 0);
+            } else {
+                fixed(24, sub_layer_reserved_zero_43bits, 0);
+                fixed(19, sub_layer_reserved_zero_43bits, 0);
+            }
+
+            if (profile_compatible(1) || profile_compatible(2) ||
+                profile_compatible(3) || profile_compatible(4) ||
+                profile_compatible(5) || profile_compatible(9)) {
+                flags(sub_layer_inbld_flag[i], 1, i);
+            } else {
+                fixed(1, sub_layer_reserved_zero_bit, 0);
+            }
+#undef profile_compatible
+        }
         if (current->sub_layer_level_present_flag[i])
-            return AVERROR_PATCHWELCOME;
+            ubs(8, sub_layer_level_idc[i], 1, i);
     }
 
     return 0;
@@ -206,20 +265,20 @@ static int FUNC(hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
             current->vcl_hrd_parameters_present_flag) {
             flag(sub_pic_hrd_params_present_flag);
             if (current->sub_pic_hrd_params_present_flag) {
-                u(8, tick_divisor_minus2, 0, 255);
-                u(5, du_cpb_removal_delay_increment_length_minus1, 0, 31);
+                ub(8, tick_divisor_minus2);
+                ub(5, du_cpb_removal_delay_increment_length_minus1);
                 flag(sub_pic_cpb_params_in_pic_timing_sei_flag);
-                u(5, dpb_output_delay_du_length_minus1, 0, 31);
+                ub(5, dpb_output_delay_du_length_minus1);
             }
 
-            u(4, bit_rate_scale, 0, 15);
-            u(4, cpb_size_scale, 0, 15);
+            ub(4, bit_rate_scale);
+            ub(4, cpb_size_scale);
             if (current->sub_pic_hrd_params_present_flag)
-                u(4, cpb_size_du_scale, 0, 15);
+                ub(4, cpb_size_du_scale);
 
-            u(5, initial_cpb_removal_delay_length_minus1, 0, 31);
-            u(5, au_cpb_removal_delay_length_minus1,      0, 31);
-            u(5, dpb_output_delay_length_minus1,          0, 31);
+            ub(5, initial_cpb_removal_delay_length_minus1);
+            ub(5, au_cpb_removal_delay_length_minus1);
+            ub(5, dpb_output_delay_length_minus1);
         } else {
             infer(sub_pic_hrd_params_present_flag, 0);
 
@@ -264,10 +323,10 @@ static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
 
     flag(aspect_ratio_info_present_flag);
     if (current->aspect_ratio_info_present_flag) {
-        u(8, aspect_ratio_idc, 0, 255);
+        ub(8, aspect_ratio_idc);
         if (current->aspect_ratio_idc == 255) {
-            u(16, sar_width,  0, 65535);
-            u(16, sar_height, 0, 65535);
+            ub(16, sar_width);
+            ub(16, sar_height);
         }
     } else {
         infer(aspect_ratio_idc, 0);
@@ -279,13 +338,13 @@ static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
 
     flag(video_signal_type_present_flag);
     if (current->video_signal_type_present_flag) {
-        u(3, video_format, 0, 7);
+        ub(3, video_format);
         flag(video_full_range_flag);
         flag(colour_description_present_flag);
         if (current->colour_description_present_flag) {
-            u(8, colour_primaries,         0, 255);
-            u(8, transfer_characteristics, 0, 255);
-            u(8, matrix_coefficients,      0, 255);
+            ub(8, colour_primaries);
+            ub(8, transfer_characteristics);
+            ub(8, matrix_coefficients);
         } else {
             infer(colour_primaries,         2);
             infer(transfer_characteristics, 2);
@@ -367,7 +426,7 @@ static int FUNC(vps)(CodedBitstreamContext *ctx, RWContext *rw,
 
     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_VPS));
 
-    u(4, vps_video_parameter_set_id, 0, 15);
+    ub(4, vps_video_parameter_set_id);
 
     flag(vps_base_layer_internal_flag);
     flag(vps_base_layer_available_flag);
@@ -463,7 +522,7 @@ static int FUNC(st_ref_pic_set)(CodedBitstreamContext *ctx, RWContext *rw,
         infer(inter_ref_pic_set_prediction_flag, 0);
 
     if (current->inter_ref_pic_set_prediction_flag) {
-        unsigned int ref_rps_idx, num_delta_pocs;
+        unsigned int ref_rps_idx, num_delta_pocs, num_ref_pics;
         const H265RawSTRefPicSet *ref;
         int delta_rps, d_poc;
         int ref_delta_poc_s0[HEVC_MAX_REFS], ref_delta_poc_s1[HEVC_MAX_REFS];
@@ -479,18 +538,28 @@ static int FUNC(st_ref_pic_set)(CodedBitstreamContext *ctx, RWContext *rw,
         ref_rps_idx = st_rps_idx - (current->delta_idx_minus1 + 1);
         ref = &sps->st_ref_pic_set[ref_rps_idx];
         num_delta_pocs = ref->num_negative_pics + ref->num_positive_pics;
+        av_assert0(num_delta_pocs < HEVC_MAX_DPB_SIZE);
 
         flag(delta_rps_sign);
         ue(abs_delta_rps_minus1, 0, INT16_MAX);
         delta_rps = (1 - 2 * current->delta_rps_sign) *
             (current->abs_delta_rps_minus1 + 1);
 
+        num_ref_pics = 0;
         for (j = 0; j <= num_delta_pocs; j++) {
             flags(used_by_curr_pic_flag[j], 1, j);
             if (!current->used_by_curr_pic_flag[j])
                 flags(use_delta_flag[j], 1, j);
             else
                 infer(use_delta_flag[j], 1);
+            if (current->use_delta_flag[j])
+                ++num_ref_pics;
+        }
+        if (num_ref_pics >= HEVC_MAX_DPB_SIZE) {
+            av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "
+                   "short-term ref pic set %d "
+                   "contains too many pictures.\n", st_rps_idx);
+            return AVERROR_INVALIDDATA;
         }
 
         // Since the stored form of an RPS here is actually the delta-step
@@ -664,8 +733,7 @@ static int FUNC(sps_scc_extension)(CodedBitstreamContext *ctx, RWContext *rw,
                 int bit_depth = comp == 0 ? current->bit_depth_luma_minus8 + 8
                                           : current->bit_depth_chroma_minus8 + 8;
                 for (i = 0; i <= current->sps_num_palette_predictor_initializer_minus1; i++)
-                    us(bit_depth, sps_palette_predictor_initializers[comp][i],
-                       0, MAX_UINT_BITS(bit_depth), 2, comp, i);
+                    ubs(bit_depth, sps_palette_predictor_initializers[comp][i], 2, comp, i);
             }
         }
     }
@@ -689,7 +757,7 @@ static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
 
     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_SPS));
 
-    u(4, sps_video_parameter_set_id, 0, 15);
+    ub(4, sps_video_parameter_set_id);
     h265->active_vps = vps = h265->vps[current->sps_video_parameter_set_id];
 
     u(3, sps_max_sub_layers_minus1, 0, HEVC_MAX_SUB_LAYERS - 1);
@@ -828,9 +896,8 @@ static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
     if (current->long_term_ref_pics_present_flag) {
         ue(num_long_term_ref_pics_sps, 0, HEVC_MAX_LONG_TERM_REF_PICS);
         for (i = 0; i < current->num_long_term_ref_pics_sps; i++) {
-            us(current->log2_max_pic_order_cnt_lsb_minus4 + 4,
-               lt_ref_pic_poc_lsb_sps[i],
-               0, MAX_UINT_BITS(current->log2_max_pic_order_cnt_lsb_minus4 + 4), 1, i);
+            ubs(current->log2_max_pic_order_cnt_lsb_minus4 + 4,
+                lt_ref_pic_poc_lsb_sps[i], 1, i);
             flags(used_by_curr_pic_lt_sps_flag[i], 1, i);
         }
     }
@@ -848,7 +915,7 @@ static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
         flag(sps_multilayer_extension_flag);
         flag(sps_3d_extension_flag);
         flag(sps_scc_extension_flag);
-        u(4, sps_extension_4bits, 0, MAX_UINT_BITS(4));
+        ub(4, sps_extension_4bits);
     }
 
     if (current->sps_range_extension_flag)
@@ -927,8 +994,7 @@ static int FUNC(pps_scc_extension)(CodedBitstreamContext *ctx, RWContext *rw,
                 int bit_depth = comp == 0 ? current->luma_bit_depth_entry_minus8 + 8
                                           : current->chroma_bit_depth_entry_minus8 + 8;
                 for (i = 0; i < current->pps_num_palette_predictor_initializer; i++)
-                    us(bit_depth, pps_palette_predictor_initializers[comp][i],
-                       0, MAX_UINT_BITS(bit_depth), 2, comp, i);
+                    ubs(bit_depth, pps_palette_predictor_initializers[comp][i], 2, comp, i);
             }
         }
     }
@@ -959,7 +1025,7 @@ static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw,
 
     flag(dependent_slice_segments_enabled_flag);
     flag(output_flag_present_flag);
-    u(3, num_extra_slice_header_bits, 0, 7);
+    ub(3, num_extra_slice_header_bits);
     flag(sign_data_hiding_enabled_flag);
     flag(cabac_init_present_flag);
 
@@ -1041,7 +1107,7 @@ static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw,
         flag(pps_multilayer_extension_flag);
         flag(pps_3d_extension_flag);
         flag(pps_scc_extension_flag);
-        u(4, pps_extension_4bits, 0, MAX_UINT_BITS(4));
+        ub(4, pps_extension_4bits);
     }
     if (current->pps_range_extension_flag)
         CHECK(FUNC(pps_range_extension)(ctx, rw, current));
@@ -1219,7 +1285,7 @@ static int FUNC(slice_segment_header)(CodedBitstreamContext *ctx, RWContext *rw,
     flag(first_slice_segment_in_pic_flag);
 
     if (current->nal_unit_header.nal_unit_type >= HEVC_NAL_BLA_W_LP &&
-        current->nal_unit_header.nal_unit_type <= HEVC_NAL_IRAP_VCL23)
+        current->nal_unit_header.nal_unit_type <= HEVC_NAL_RSV_IRAP_VCL23)
         flag(no_output_of_prior_pics_flag);
 
     ue(slice_pic_parameter_set_id, 0, 63);
@@ -1276,8 +1342,7 @@ static int FUNC(slice_segment_header)(CodedBitstreamContext *ctx, RWContext *rw,
             current->nal_unit_header.nal_unit_type != HEVC_NAL_IDR_N_LP) {
             const H265RawSTRefPicSet *rps;
 
-            u(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, slice_pic_order_cnt_lsb,
-              0, MAX_UINT_BITS(sps->log2_max_pic_order_cnt_lsb_minus4 + 4));
+            ub(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, slice_pic_order_cnt_lsb);
 
             flag(short_term_ref_pic_set_sps_flag);
             if (!current->short_term_ref_pic_set_sps_flag) {
@@ -1312,7 +1377,7 @@ static int FUNC(slice_segment_header)(CodedBitstreamContext *ctx, RWContext *rw,
                     infer(num_long_term_sps, 0);
                     idx_size = 0;
                 }
-                ue(num_long_term_pics, 0, HEVC_MAX_LONG_TERM_REF_PICS);
+                ue(num_long_term_pics, 0, HEVC_MAX_REFS - current->num_long_term_sps);
 
                 for (i = 0; i < current->num_long_term_sps +
                                 current->num_long_term_pics; i++) {
@@ -1323,8 +1388,7 @@ static int FUNC(slice_segment_header)(CodedBitstreamContext *ctx, RWContext *rw,
                         if (sps->used_by_curr_pic_lt_sps_flag[current->lt_idx_sps[i]])
                             ++num_pic_total_curr;
                     } else {
-                        us(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, poc_lsb_lt[i],
-                           0, MAX_UINT_BITS(sps->log2_max_pic_order_cnt_lsb_minus4 + 4), 1, i);
+                        ubs(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, poc_lsb_lt[i], 1, i);
                         flags(used_by_curr_pic_lt_flag[i], 1, i);
                         if (current->used_by_curr_pic_lt_flag[i])
                             ++num_pic_total_curr;
@@ -1489,8 +1553,7 @@ static int FUNC(slice_segment_header)(CodedBitstreamContext *ctx, RWContext *rw,
         if (current->num_entry_point_offsets > 0) {
             ue(offset_len_minus1, 0, 31);
             for (i = 0; i < current->num_entry_point_offsets; i++)
-                us(current->offset_len_minus1 + 1, entry_point_offset_minus1[i],
-                   0, MAX_UINT_BITS(current->offset_len_minus1 + 1), 1, i);
+                ubs(current->offset_len_minus1 + 1, entry_point_offset_minus1[i], 1, i);
         }
     }
 
@@ -1505,11 +1568,439 @@ static int FUNC(slice_segment_header)(CodedBitstreamContext *ctx, RWContext *rw,
     return 0;
 }
 
+static int FUNC(sei_buffering_period)(CodedBitstreamContext *ctx, RWContext *rw,
+                                      H265RawSEIBufferingPeriod *current,
+                                      uint32_t *payload_size,
+                                      int *more_data)
+{
+    CodedBitstreamH265Context *h265 = ctx->priv_data;
+    const H265RawSPS *sps;
+    const H265RawHRDParameters *hrd;
+    int err, i, length;
+
+#ifdef READ
+    int start_pos, end_pos;
+    start_pos = get_bits_count(rw);
+#endif
+
+    HEADER("Buffering Period");
+
+    ue(bp_seq_parameter_set_id, 0, HEVC_MAX_SPS_COUNT - 1);
+
+    sps = h265->sps[current->bp_seq_parameter_set_id];
+    if (!sps) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
+               current->bp_seq_parameter_set_id);
+        return AVERROR_INVALIDDATA;
+    }
+    h265->active_sps = sps;
+
+    if (!sps->vui_parameters_present_flag ||
+        !sps->vui.vui_hrd_parameters_present_flag) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR, "Buffering period SEI requires "
+               "HRD parameters to be present in SPS.\n");
+        return AVERROR_INVALIDDATA;
+    }
+    hrd = &sps->vui.hrd_parameters;
+    if (!hrd->nal_hrd_parameters_present_flag &&
+        !hrd->vcl_hrd_parameters_present_flag) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR, "Buffering period SEI requires "
+               "NAL or VCL HRD parameters to be present.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    if (!hrd->sub_pic_hrd_params_present_flag)
+        flag(irap_cpb_params_present_flag);
+    else
+        infer(irap_cpb_params_present_flag, 0);
+    if (current->irap_cpb_params_present_flag) {
+        length = hrd->au_cpb_removal_delay_length_minus1 + 1;
+        ub(length, cpb_delay_offset);
+        length = hrd->dpb_output_delay_length_minus1 + 1;
+        ub(length, dpb_delay_offset);
+    } else {
+        infer(cpb_delay_offset, 0);
+        infer(dpb_delay_offset, 0);
+    }
+
+    flag(concatenation_flag);
+
+    length = hrd->au_cpb_removal_delay_length_minus1 + 1;
+    ub(length, au_cpb_removal_delay_delta_minus1);
+
+    if (hrd->nal_hrd_parameters_present_flag) {
+        for (i = 0; i <= hrd->cpb_cnt_minus1[0]; i++) {
+            length = hrd->initial_cpb_removal_delay_length_minus1 + 1;
+
+            ubs(length, nal_initial_cpb_removal_delay[i], 1, i);
+            ubs(length, nal_initial_cpb_removal_offset[i], 1, i);
+
+            if (hrd->sub_pic_hrd_params_present_flag ||
+                current->irap_cpb_params_present_flag) {
+                ubs(length, nal_initial_alt_cpb_removal_delay[i], 1, i);
+                ubs(length, nal_initial_alt_cpb_removal_offset[i], 1, i);
+            }
+        }
+    }
+    if (hrd->vcl_hrd_parameters_present_flag) {
+        for (i = 0; i <= hrd->cpb_cnt_minus1[0]; i++) {
+            length = hrd->initial_cpb_removal_delay_length_minus1 + 1;
+
+            ubs(length, vcl_initial_cpb_removal_delay[i], 1, i);
+            ubs(length, vcl_initial_cpb_removal_offset[i], 1, i);
+
+            if (hrd->sub_pic_hrd_params_present_flag ||
+                current->irap_cpb_params_present_flag) {
+                ubs(length, vcl_initial_alt_cpb_removal_delay[i], 1, i);
+                ubs(length, vcl_initial_alt_cpb_removal_offset[i], 1, i);
+            }
+        }
+    }
+
+#ifdef READ
+    end_pos = get_bits_count(rw);
+    if (cbs_h265_payload_extension_present(rw, *payload_size,
+                                           end_pos - start_pos))
+        flag(use_alt_cpb_params_flag);
+    else
+        infer(use_alt_cpb_params_flag, 0);
+#else
+    // If unknown extension data exists, then use_alt_cpb_params_flag is
+    // coded in the bitstream and must be written even if it's 0.
+    if (current->use_alt_cpb_params_flag || *more_data) {
+        flag(use_alt_cpb_params_flag);
+        // Ensure this bit is not the last in the payload by making the
+        // more_data_in_payload() check evaluate to true, so it may not
+        // be mistaken as something else by decoders.
+        *more_data = 1;
+    }
+#endif
+
+    return 0;
+}
+
+static int FUNC(sei_pic_timing)(CodedBitstreamContext *ctx, RWContext *rw,
+                                H265RawSEIPicTiming *current)
+{
+    CodedBitstreamH265Context *h265 = ctx->priv_data;
+    const H265RawSPS *sps;
+    const H265RawHRDParameters *hrd;
+    int err, expected_source_scan_type, i, length;
+
+    HEADER("Picture Timing");
+
+    sps = h265->active_sps;
+    if (!sps) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR,
+               "No active SPS for pic_timing.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    expected_source_scan_type = 2 -
+        2 * sps->profile_tier_level.general_interlaced_source_flag -
+        sps->profile_tier_level.general_progressive_source_flag;
+
+    if (sps->vui.frame_field_info_present_flag) {
+        u(4, pic_struct, 0, 12);
+        u(2, source_scan_type,
+          expected_source_scan_type >= 0 ? expected_source_scan_type : 0,
+          expected_source_scan_type >= 0 ? expected_source_scan_type : 2);
+        flag(duplicate_flag);
+    } else {
+        infer(pic_struct, 0);
+        infer(source_scan_type,
+              expected_source_scan_type >= 0 ? expected_source_scan_type : 2);
+        infer(duplicate_flag, 0);
+    }
+
+    if (sps->vui_parameters_present_flag &&
+        sps->vui.vui_hrd_parameters_present_flag)
+        hrd = &sps->vui.hrd_parameters;
+    else
+        hrd = NULL;
+    if (hrd && (hrd->nal_hrd_parameters_present_flag ||
+                hrd->vcl_hrd_parameters_present_flag)) {
+        length = hrd->au_cpb_removal_delay_length_minus1 + 1;
+        ub(length, au_cpb_removal_delay_minus1);
+
+        length = hrd->dpb_output_delay_length_minus1 + 1;
+        ub(length, pic_dpb_output_delay);
+
+        if (hrd->sub_pic_hrd_params_present_flag) {
+            length = hrd->dpb_output_delay_du_length_minus1 + 1;
+            ub(length, pic_dpb_output_du_delay);
+        }
+
+        if (hrd->sub_pic_hrd_params_present_flag &&
+            hrd->sub_pic_cpb_params_in_pic_timing_sei_flag) {
+            // Each decoding unit must contain at least one slice segment.
+            ue(num_decoding_units_minus1, 0, HEVC_MAX_SLICE_SEGMENTS);
+            flag(du_common_cpb_removal_delay_flag);
+
+            length = hrd->du_cpb_removal_delay_increment_length_minus1 + 1;
+            if (current->du_common_cpb_removal_delay_flag)
+                ub(length, du_common_cpb_removal_delay_increment_minus1);
+
+            for (i = 0; i <= current->num_decoding_units_minus1; i++) {
+                ues(num_nalus_in_du_minus1[i],
+                    0, HEVC_MAX_SLICE_SEGMENTS, 1, i);
+                if (!current->du_common_cpb_removal_delay_flag &&
+                    i < current->num_decoding_units_minus1)
+                    ubs(length, du_cpb_removal_delay_increment_minus1[i], 1, i);
+            }
+        }
+    }
+
+    return 0;
+}
+
+static int FUNC(sei_pan_scan_rect)(CodedBitstreamContext *ctx, RWContext *rw,
+                                   H265RawSEIPanScanRect *current)
+{
+    int err, i;
+
+    HEADER("Pan-Scan Rectangle");
+
+    ue(pan_scan_rect_id, 0, UINT32_MAX - 1);
+    flag(pan_scan_rect_cancel_flag);
+
+    if (!current->pan_scan_rect_cancel_flag) {
+        ue(pan_scan_cnt_minus1, 0, 2);
+
+        for (i = 0; i <= current->pan_scan_cnt_minus1; i++) {
+            ses(pan_scan_rect_left_offset[i],   INT32_MIN + 1, INT32_MAX, 1, i);
+            ses(pan_scan_rect_right_offset[i],  INT32_MIN + 1, INT32_MAX, 1, i);
+            ses(pan_scan_rect_top_offset[i],    INT32_MIN + 1, INT32_MAX, 1, i);
+            ses(pan_scan_rect_bottom_offset[i], INT32_MIN + 1, INT32_MAX, 1, i);
+        }
+
+        flag(pan_scan_rect_persistence_flag);
+    }
+
+    return 0;
+}
+
+static int FUNC(sei_user_data_registered)(CodedBitstreamContext *ctx, RWContext *rw,
+                                          H265RawSEIUserDataRegistered *current,
+                                          uint32_t *payload_size)
+{
+    int err, i, j;
+
+    HEADER("User Data Registered ITU-T T.35");
+
+    u(8, itu_t_t35_country_code, 0x00, 0xff);
+    if (current->itu_t_t35_country_code != 0xff)
+        i = 1;
+    else {
+        u(8, itu_t_t35_country_code_extension_byte, 0x00, 0xff);
+        i = 2;
+    }
+
+#ifdef READ
+    if (*payload_size < i) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR,
+               "Invalid SEI user data registered payload.\n");
+        return AVERROR_INVALIDDATA;
+    }
+    current->data_length = *payload_size - i;
+#else
+    *payload_size = i + current->data_length;
+#endif
+
+    allocate(current->data, current->data_length);
+    for (j = 0; j < current->data_length; j++)
+        xu(8, itu_t_t35_payload_byte[i], current->data[j], 0x00, 0xff, 1, i + j);
+
+    return 0;
+}
+
+static int FUNC(sei_user_data_unregistered)(CodedBitstreamContext *ctx, RWContext *rw,
+                                            H265RawSEIUserDataUnregistered *current,
+                                            uint32_t *payload_size)
+{
+    int err, i;
+
+    HEADER("User Data Unregistered");
+
+#ifdef READ
+    if (*payload_size < 16) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR,
+               "Invalid SEI user data unregistered payload.\n");
+        return AVERROR_INVALIDDATA;
+    }
+    current->data_length = *payload_size - 16;
+#else
+    *payload_size = 16 + current->data_length;
+#endif
+
+    for (i = 0; i < 16; i++)
+        us(8, uuid_iso_iec_11578[i], 0x00, 0xff, 1, i);
+
+    allocate(current->data, current->data_length);
+
+    for (i = 0; i < current->data_length; i++)
+        xu(8, user_data_payload_byte[i], current->data[i], 0x00, 0xff, 1, i);
+
+    return 0;
+}
+
+static int FUNC(sei_recovery_point)(CodedBitstreamContext *ctx, RWContext *rw,
+                                    H265RawSEIRecoveryPoint *current)
+{
+    int err;
+
+    HEADER("Recovery Point");
+
+    se(recovery_poc_cnt, -32768, 32767);
+
+    flag(exact_match_flag);
+    flag(broken_link_flag);
+
+    return 0;
+}
+
+static int FUNC(sei_display_orientation)(CodedBitstreamContext *ctx, RWContext *rw,
+                                         H265RawSEIDisplayOrientation *current)
+{
+    int err;
+
+    HEADER("Display Orientation");
+
+    flag(display_orientation_cancel_flag);
+    if (!current->display_orientation_cancel_flag) {
+        flag(hor_flip);
+        flag(ver_flip);
+        ub(16, anticlockwise_rotation);
+        flag(display_orientation_persistence_flag);
+    }
+
+    return 0;
+}
+
+static int FUNC(sei_active_parameter_sets)(CodedBitstreamContext *ctx, RWContext *rw,
+                                           H265RawSEIActiveParameterSets *current)
+{
+    CodedBitstreamH265Context *h265 = ctx->priv_data;
+    const H265RawVPS *vps;
+    int err, i;
+
+    HEADER("Active Parameter Sets");
+
+    u(4, active_video_parameter_set_id, 0, HEVC_MAX_VPS_COUNT);
+    vps = h265->vps[current->active_video_parameter_set_id];
+    if (!vps) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR, "VPS id %d not available for active "
+               "parameter sets.\n", current->active_video_parameter_set_id);
+        return AVERROR_INVALIDDATA;
+    }
+    h265->active_vps = vps;
+
+    flag(self_contained_cvs_flag);
+    flag(no_parameter_set_update_flag);
+
+    ue(num_sps_ids_minus1, 0, HEVC_MAX_SPS_COUNT - 1);
+    for (i = 0; i <= current->num_sps_ids_minus1; i++)
+        ues(active_seq_parameter_set_id[i], 0, HEVC_MAX_SPS_COUNT - 1, 1, i);
+
+    for (i = vps->vps_base_layer_internal_flag;
+         i <= FFMIN(62, vps->vps_max_layers_minus1); i++) {
+        ues(layer_sps_idx[i], 0, current->num_sps_ids_minus1, 1, i);
+
+        if (i == 0)
+            h265->active_sps = h265->sps[current->active_seq_parameter_set_id[current->layer_sps_idx[0]]];
+    }
+
+    return 0;
+}
+
+static int FUNC(sei_decoded_picture_hash)(CodedBitstreamContext *ctx, RWContext *rw,
+                                          H265RawSEIDecodedPictureHash *current)
+{
+    CodedBitstreamH265Context *h265 = ctx->priv_data;
+    const H265RawSPS *sps = h265->active_sps;
+    int err, c, i;
+
+    HEADER("Decoded Picture Hash");
+
+    if (!sps) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR,
+               "No active SPS for decoded picture hash.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    u(8, hash_type, 0, 2);
+
+    for (c = 0; c < (sps->chroma_format_idc == 0 ? 1 : 3); c++) {
+        if (current->hash_type == 0) {
+            for (i = 0; i < 16; i++)
+                us(8, picture_md5[c][i], 0x00, 0xff, 2, c, i);
+        } else if (current->hash_type == 1) {
+            us(16, picture_crc[c], 0x0000, 0xffff, 1, c);
+        } else if (current->hash_type == 2) {
+            us(32, picture_checksum[c], 0x00000000, 0xffffffff, 1, c);
+        }
+    }
+
+    return 0;
+}
+
+static int FUNC(sei_time_code)(CodedBitstreamContext *ctx, RWContext *rw,
+                               H265RawSEITimeCode *current)
+{
+    int err, i;
+
+    HEADER("Time Code");
+
+    u(2, num_clock_ts, 1, 3);
+
+    for (i = 0; i < current->num_clock_ts; i++) {
+        flags(clock_timestamp_flag[i],   1, i);
+
+        if (current->clock_timestamp_flag[i]) {
+            flags(units_field_based_flag[i], 1, i);
+            us(5, counting_type[i], 0, 6,    1, i);
+            flags(full_timestamp_flag[i],    1, i);
+            flags(discontinuity_flag[i],     1, i);
+            flags(cnt_dropped_flag[i],       1, i);
+
+            ubs(9, n_frames[i], 1, i);
+
+            if (current->full_timestamp_flag[i]) {
+                us(6, seconds_value[i], 0, 59, 1, i);
+                us(6, minutes_value[i], 0, 59, 1, i);
+                us(5, hours_value[i],   0, 23, 1, i);
+            } else {
+                flags(seconds_flag[i], 1, i);
+                if (current->seconds_flag[i]) {
+                    us(6, seconds_value[i], 0, 59, 1, i);
+                    flags(minutes_flag[i], 1, i);
+                    if (current->minutes_flag[i]) {
+                        us(6, minutes_value[i], 0, 59, 1, i);
+                        flags(hours_flag[i], 1, i);
+                        if (current->hours_flag[i])
+                            us(5, hours_value[i], 0, 23, 1, i);
+                    }
+                }
+            }
+
+            ubs(5, time_offset_length[i], 1, i);
+            if (current->time_offset_length[i] > 0)
+                ibs(current->time_offset_length[i], time_offset_value[i], 1, i);
+            else
+                infer(time_offset_value[i], 0);
+        }
+    }
+
+    return 0;
+}
+
 static int FUNC(sei_mastering_display)(CodedBitstreamContext *ctx, RWContext *rw,
                                        H265RawSEIMasteringDisplayColourVolume *current)
 {
     int err, c;
 
+    HEADER("Mastering Display Colour Volume");
+
     for (c = 0; c < 3; c++) {
         us(16, display_primaries_x[c], 0, 50000, 1, c);
         us(16, display_primaries_y[c], 0, 50000, 1, c);
@@ -1531,17 +2022,97 @@ static int FUNC(sei_content_light_level)(CodedBitstreamContext *ctx, RWContext *
 {
     int err;
 
-    u(16, max_content_light_level, 0, MAX_UINT_BITS(16));
-    u(16, max_pic_average_light_level, 0, MAX_UINT_BITS(16));
+    HEADER("Content Light Level");
+
+    ub(16, max_content_light_level);
+    ub(16, max_pic_average_light_level);
+
+    return 0;
+}
+
+static int FUNC(sei_alternative_transfer_characteristics)(CodedBitstreamContext *ctx,
+                                                          RWContext *rw,
+                                                          H265RawSEIAlternativeTransferCharacteristics *current)
+{
+    int err;
+
+    HEADER("Alternative Transfer Characteristics");
+
+    ub(8, preferred_transfer_characteristics);
+
+    return 0;
+}
+
+static int FUNC(sei_alpha_channel_info)(CodedBitstreamContext *ctx,
+                                        RWContext *rw,
+                                        H265RawSEIAlphaChannelInfo *current)
+{
+    int err, length;
+
+    HEADER("Alpha Channel Information");
+
+    flag(alpha_channel_cancel_flag);
+    if (!current->alpha_channel_cancel_flag) {
+        ub(3, alpha_channel_use_idc);
+        ub(3, alpha_channel_bit_depth_minus8);
+        length = current->alpha_channel_bit_depth_minus8 + 9;
+        ub(length, alpha_transparent_value);
+        ub(length, alpha_opaque_value);
+        flag(alpha_channel_incr_flag);
+        flag(alpha_channel_clip_flag);
+        if (current->alpha_channel_clip_flag)
+            flag(alpha_channel_clip_type_flag);
+    } else {
+       infer(alpha_channel_use_idc,   2);
+       infer(alpha_channel_incr_flag, 0);
+       infer(alpha_channel_clip_flag, 0);
+    }
+
+    return 0;
+}
+
+static int FUNC(payload_extension)(CodedBitstreamContext *ctx, RWContext *rw,
+                                   H265RawExtensionData *current, uint32_t payload_size,
+                                   int cur_pos)
+{
+    int err;
+    size_t byte_length, k;
+
+#ifdef READ
+    GetBitContext tmp;
+    int bits_left, payload_zero_bits;
+
+    if (!cbs_h265_payload_extension_present(rw, payload_size, cur_pos))
+        return 0;
+
+    bits_left = 8 * payload_size - cur_pos;
+    tmp = *rw;
+    if (bits_left > 8)
+        skip_bits_long(&tmp, bits_left - 8);
+    payload_zero_bits = get_bits(&tmp, FFMIN(bits_left, 8));
+    if (!payload_zero_bits)
+        return AVERROR_INVALIDDATA;
+    payload_zero_bits = ff_ctz(payload_zero_bits);
+    current->bit_length = bits_left - payload_zero_bits - 1;
+    allocate(current->data, (current->bit_length + 7) / 8);
+#endif
+
+    byte_length = (current->bit_length + 7) / 8;
+    for (k = 0; k < byte_length; k++) {
+        int length = FFMIN(current->bit_length - k * 8, 8);
+        xu(length, reserved_payload_extension_data, current->data[k],
+           0, MAX_UINT_BITS(length), 0);
+    }
 
     return 0;
 }
 
 static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,
-                             H265RawSEIPayload *current)
+                             H265RawSEIPayload *current, int prefix)
 {
     int err, i;
-    int start_position, end_position;
+    int start_position, current_position;
+    int more_data = !!current->extension_data.bit_length;
 
 #ifdef READ
     start_position = get_bits_count(rw);
@@ -1550,18 +2121,55 @@ static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,
 #endif
 
     switch (current->payload_type) {
-    case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
-        CHECK(FUNC(sei_mastering_display)
-              (ctx, rw, &current->payload.mastering_display));
-
-        break;
-
-    case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
-        CHECK(FUNC(sei_content_light_level)
-              (ctx, rw, &current->payload.content_light_level));
-
-        break;
-
+#define SEI_TYPE_CHECK_VALID(name, prefix_valid, suffix_valid) do { \
+            if (prefix && !prefix_valid) { \
+                av_log(ctx->log_ctx, AV_LOG_ERROR, "SEI type %s invalid " \
+                       "as prefix SEI!\n", #name); \
+                return AVERROR_INVALIDDATA; \
+            } \
+            if (!prefix && !suffix_valid) { \
+                av_log(ctx->log_ctx, AV_LOG_ERROR, "SEI type %s invalid " \
+                       "as suffix SEI!\n", #name); \
+                return AVERROR_INVALIDDATA; \
+            } \
+        } while (0)
+#define SEI_TYPE_N(type, prefix_valid, suffix_valid, name) \
+    case HEVC_SEI_TYPE_ ## type: \
+        SEI_TYPE_CHECK_VALID(name, prefix_valid, suffix_valid); \
+        CHECK(FUNC(sei_ ## name)(ctx, rw, &current->payload.name)); \
+        break
+#define SEI_TYPE_S(type, prefix_valid, suffix_valid, name) \
+    case HEVC_SEI_TYPE_ ## type: \
+        SEI_TYPE_CHECK_VALID(name, prefix_valid, suffix_valid); \
+        CHECK(FUNC(sei_ ## name)(ctx, rw, &current->payload.name, \
+                                 &current->payload_size)); \
+        break
+#define SEI_TYPE_E(type, prefix_valid, suffix_valid, name) \
+    case HEVC_SEI_TYPE_ ## type: \
+        SEI_TYPE_CHECK_VALID(name, prefix_valid, suffix_valid); \
+        CHECK(FUNC(sei_ ## name)(ctx, rw, &current->payload.name, \
+                                 &current->payload_size, \
+                                 &more_data)); \
+        break
+
+        SEI_TYPE_E(BUFFERING_PERIOD,         1, 0, buffering_period);
+        SEI_TYPE_N(PICTURE_TIMING,           1, 0, pic_timing);
+        SEI_TYPE_N(PAN_SCAN_RECT,            1, 0, pan_scan_rect);
+        SEI_TYPE_S(USER_DATA_REGISTERED_ITU_T_T35,
+                                             1, 1, user_data_registered);
+        SEI_TYPE_S(USER_DATA_UNREGISTERED,   1, 1, user_data_unregistered);
+        SEI_TYPE_N(RECOVERY_POINT,           1, 0, recovery_point);
+        SEI_TYPE_N(DISPLAY_ORIENTATION,      1, 0, display_orientation);
+        SEI_TYPE_N(ACTIVE_PARAMETER_SETS,    1, 0, active_parameter_sets);
+        SEI_TYPE_N(DECODED_PICTURE_HASH,     0, 1, decoded_picture_hash);
+        SEI_TYPE_N(TIME_CODE,                1, 0, time_code);
+        SEI_TYPE_N(MASTERING_DISPLAY_INFO,   1, 0, mastering_display);
+        SEI_TYPE_N(CONTENT_LIGHT_LEVEL_INFO, 1, 0, content_light_level);
+        SEI_TYPE_N(ALTERNATIVE_TRANSFER_CHARACTERISTICS,
+                                             1, 0, alternative_transfer_characteristics);
+        SEI_TYPE_N(ALPHA_CHANNEL_INFO,       1, 0, alpha_channel_info);
+
+#undef SEI_TYPE
     default:
         {
 #ifdef READ
@@ -1575,38 +2183,41 @@ static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,
         }
     }
 
-    if (byte_alignment(rw)) {
+    // more_data_in_payload()
+#ifdef READ
+    current_position = get_bits_count(rw) - start_position;
+    if (current_position < 8 * current->payload_size) {
+#else
+    current_position = put_bits_count(rw) - start_position;
+    if (byte_alignment(rw) || more_data) {
+#endif
+        CHECK(FUNC(payload_extension)(ctx, rw, &current->extension_data,
+                                      current->payload_size, current_position));
         fixed(1, bit_equal_to_one, 1);
         while (byte_alignment(rw))
             fixed(1, bit_equal_to_zero, 0);
     }
 
-#ifdef READ
-    end_position = get_bits_count(rw);
-    if (end_position < start_position + 8 * current->payload_size) {
-        av_log(ctx->log_ctx, AV_LOG_ERROR, "Incorrect SEI payload length: "
-               "header %"PRIu32" bits, actually %d bits.\n",
-               8 * current->payload_size,
-               end_position - start_position);
-        return AVERROR_INVALIDDATA;
-    }
-#else
-    end_position = put_bits_count(rw);
-    current->payload_size = (end_position - start_position) >> 3;
+#ifdef WRITE
+    current->payload_size = (put_bits_count(rw) - start_position) >> 3;
 #endif
 
     return 0;
 }
 
 static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
-                     H265RawSEI *current)
+                     H265RawSEI *current, int prefix)
 {
     int err, k;
 
-    HEADER("Supplemental Enhancement Information");
+    if (prefix)
+        HEADER("Prefix Supplemental Enhancement Information");
+    else
+        HEADER("Suffix Supplemental Enhancement Information");
 
     CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
-                                HEVC_NAL_SEI_PREFIX));
+                                prefix ? HEVC_NAL_SEI_PREFIX
+                                       : HEVC_NAL_SEI_SUFFIX));
 
 #ifdef READ
     for (k = 0; k < H265_MAX_SEI_PAYLOADS; k++) {
@@ -1631,7 +2242,8 @@ static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
         current->payload[k].payload_type = payload_type;
         current->payload[k].payload_size = payload_size;
 
-        CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k]));
+        current->payload_count++;
+        CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k], prefix));
 
         if (!cbs_h2645_read_more_rbsp_data(rw))
             break;
@@ -1641,7 +2253,6 @@ static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
                "SEI message: found %d.\n", k);
         return AVERROR_INVALIDDATA;
     }
-    current->payload_count = k + 1;
 #else
     for (k = 0; k < current->payload_count; k++) {
         PutBitContext start_state;
@@ -1670,7 +2281,7 @@ static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
             }
             xu(8, last_payload_size_byte, tmp, 0, 254, 0);
 
-            CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k]));
+            CHECK(FUNC(sei_payload)(ctx, rw, &current->payload[k], prefix));
         }
     }
 #endif