lavc: Add coded bitstream read/write support for H.265

(cherry picked from commit 867381b8b51fa21fa2b8f071f508f3d39cc9c1f0)
(cherry picked from commit f763489364416bb6866adc4f4a96012dd2ca1bd0)
(cherry picked from commit 067a9ddeb8feff1f724856f0054930c55219f76b)

1 files changed, 1503 insertions, 0 deletions

diff --git a/libavcodec/cbs_h265_syntax_template.c b/libavcodec/cbs_h265_syntax_template.c
new file mode 100644
index 0000000..dae7f2d
--- /dev/null
+++ b/libavcodec/cbs_h265_syntax_template.c
@@ -0,0 +1,1503 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+static int FUNC(rbsp_trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw)
+{
+    int err;
+    av_unused int one = 1, zero = 0;
+    xu(1, rbsp_stop_one_bit, one, 1, 1);
+    while (byte_alignment(rw) != 0)
+        xu(1, rbsp_alignment_zero_bit, zero, 0, 0);
+
+    return 0;
+}
+
+static int FUNC(nal_unit_header)(CodedBitstreamContext *ctx, RWContext *rw,
+                                 H265RawNALUnitHeader *current,
+                                 int expected_nal_unit_type)
+{
+    int err;
+
+    u(1, forbidden_zero_bit, 0, 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);
+
+    u(6, nuh_layer_id,          0, 62);
+    u(3, nuh_temporal_id_plus1, 1,  7);
+
+    return 0;
+}
+
+static int FUNC(byte_alignment)(CodedBitstreamContext *ctx, RWContext *rw)
+{
+    int err;
+    av_unused int one = 1, zero = 0;
+    xu(1, alignment_bit_equal_to_one, one, 1, 1);
+    while (byte_alignment(rw) != 0)
+        xu(1, alignment_bit_equal_to_zero, zero, 0, 0);
+
+    return 0;
+}
+
+static int FUNC(extension_data)(CodedBitstreamContext *ctx, RWContext *rw,
+                                H265RawPSExtensionData *current)
+{
+    int err;
+    size_t k;
+#ifdef READ
+    GetBitContext start;
+    uint8_t bit;
+    start = *rw;
+    for (k = 0; cbs_h2645_read_more_rbsp_data(rw); k++)
+        skip_bits(rw, 1);
+    current->bit_length = k;
+    if (k > 0) {
+        *rw = start;
+        allocate(current->data, (current->bit_length + 7) / 8);
+        for (k = 0; k < current->bit_length; k++) {
+            xu(1, extension_data, bit, 0, 1);
+            current->data[k / 8] |= bit << (7 - k % 8);
+        }
+    }
+#else
+    for (k = 0; k < current->bit_length; k++)
+        xu(1, extension_data, current->data[k / 8] >> (7 - k % 8), 0, 1);
+#endif
+    return 0;
+}
+
+static int FUNC(profile_tier_level)(CodedBitstreamContext *ctx, RWContext *rw,
+                                    H265RawProfileTierLevel *current,
+                                    int profile_present_flag,
+                                    int max_num_sub_layers_minus1)
+{
+    av_unused unsigned int zero = 0;
+    int err, i, j;
+
+    if (profile_present_flag) {
+        u(2, general_profile_space, 0, 0);
+        flag(general_tier_flag);
+        u(5, general_profile_idc, 0, 31);
+
+        for (j = 0; j < 32; j++)
+            flag(general_profile_compatibility_flag[j]);
+
+        flag(general_progressive_source_flag);
+        flag(general_interlaced_source_flag);
+        flag(general_non_packed_constraint_flag);
+        flag(general_frame_only_constraint_flag);
+
+#define profile_compatible(x) (current->general_profile_idc == (x) || \
+                               current->general_profile_compatibility_flag[x])
+        if (profile_compatible(4) || profile_compatible(5) ||
+            profile_compatible(6) || profile_compatible(7) ||
+            profile_compatible(8) || profile_compatible(9) ||
+            profile_compatible(10)) {
+            flag(general_max_12bit_constraint_flag);
+            flag(general_max_10bit_constraint_flag);
+            flag(general_max_8bit_constraint_flag);
+            flag(general_max_422chroma_constraint_flag);
+            flag(general_max_420chroma_constraint_flag);
+            flag(general_max_monochrome_constraint_flag);
+            flag(general_intra_constraint_flag);
+            flag(general_one_picture_only_constraint_flag);
+            flag(general_lower_bit_rate_constraint_flag);
+
+            if (profile_compatible(5) || profile_compatible(9) ||
+                profile_compatible(10)) {
+                flag(general_max_14bit_constraint_flag);
+                xu(24, general_reserved_zero_33bits, zero, 0, 0);
+                xu(9, general_reserved_zero_33bits, zero, 0, 0);
+            } else {
+                xu(24, general_reserved_zero_34bits, zero, 0, 0);
+                xu(10, general_reserved_zero_34bits, zero, 0, 0);
+            }
+        } else {
+            xu(24, general_reserved_zero_43bits, zero, 0, 0);
+            xu(19, general_reserved_zero_43bits, zero, 0, 0);
+        }
+
+        if (profile_compatible(1) || profile_compatible(2) ||
+            profile_compatible(3) || profile_compatible(4) ||
+            profile_compatible(5) || profile_compatible(9)) {
+            flag(general_inbld_flag);
+        } else {
+            xu(1, general_reserved_zero_bit, zero, 0, 0);
+        }
+#undef profile_compatible
+    }
+
+    u(8, general_level_idc, 0, 255);
+
+    for (i = 0; i < max_num_sub_layers_minus1; i++) {
+        flag(sub_layer_profile_present_flag[i]);
+        flag(sub_layer_level_present_flag[i]);
+    }
+
+    if (max_num_sub_layers_minus1 > 0) {
+        for (i = max_num_sub_layers_minus1; i < 8; i++) {
+            av_unused int zero = 0;
+            xu(2, reserved_zero_2bits, zero, 0, 0);
+        }
+    }
+
+    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_level_present_flag[i])
+            return AVERROR_PATCHWELCOME;
+    }
+
+    return 0;
+}
+
+static int FUNC(sub_layer_hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
+                                          H265RawHRDParameters *hrd,
+                                          int nal, int sub_layer_id)
+{
+    H265RawSubLayerHRDParameters *current;
+    int err, i;
+
+    if (nal)
+        current = &hrd->nal_sub_layer_hrd_parameters[sub_layer_id];
+    else
+        current = &hrd->vcl_sub_layer_hrd_parameters[sub_layer_id];
+
+    for (i = 0; i <= hrd->cpb_cnt_minus1[sub_layer_id]; i++) {
+        ue(bit_rate_value_minus1[i], 0, UINT32_MAX - 1);
+        ue(cpb_size_value_minus1[i], 0, UINT32_MAX - 1);
+        if (hrd->sub_pic_hrd_params_present_flag) {
+            ue(cpb_size_du_value_minus1[i], 0, UINT32_MAX - 1);
+            ue(bit_rate_du_value_minus1[i], 0, UINT32_MAX - 1);
+        }
+        flag(cbr_flag[i]);
+    }
+
+    return 0;
+}
+
+static int FUNC(hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
+                                H265RawHRDParameters *current, int common_inf_present_flag,
+                                int max_num_sub_layers_minus1)
+{
+    int err, i;
+
+    if (common_inf_present_flag) {
+        flag(nal_hrd_parameters_present_flag);
+        flag(vcl_hrd_parameters_present_flag);
+
+        if (current->nal_hrd_parameters_present_flag ||
+            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);
+                flag(sub_pic_cpb_params_in_pic_timing_sei_flag);
+                u(5, dpb_output_delay_du_length_minus1, 0, 31);
+            }
+
+            u(4, bit_rate_scale, 0, 15);
+            u(4, cpb_size_scale, 0, 15);
+            if (current->sub_pic_hrd_params_present_flag)
+                u(4, cpb_size_du_scale, 0, 15);
+
+            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);
+        } else {
+            infer(sub_pic_hrd_params_present_flag, 0);
+
+            infer(initial_cpb_removal_delay_length_minus1, 23);
+            infer(au_cpb_removal_delay_length_minus1,      23);
+            infer(dpb_output_delay_length_minus1,          23);
+        }
+    }
+
+    for (i = 0; i <= max_num_sub_layers_minus1; i++) {
+        flag(fixed_pic_rate_general_flag[i]);
+
+        if (!current->fixed_pic_rate_general_flag[i])
+            flag(fixed_pic_rate_within_cvs_flag[i]);
+        else
+            infer(fixed_pic_rate_within_cvs_flag[i], 1);
+
+        if (current->fixed_pic_rate_within_cvs_flag[i]) {
+            ue(elemental_duration_in_tc_minus1[i], 0, 2047);
+            infer(low_delay_hrd_flag[i], 0);
+        } else
+            flag(low_delay_hrd_flag[i]);
+
+        if (!current->low_delay_hrd_flag[i])
+            ue(cpb_cnt_minus1[i], 0, 31);
+        else
+            infer(cpb_cnt_minus1[i], 0);
+
+        if (current->nal_hrd_parameters_present_flag)
+            CHECK(FUNC(sub_layer_hrd_parameters)(ctx, rw, current, 0, i));
+        if (current->vcl_hrd_parameters_present_flag)
+            CHECK(FUNC(sub_layer_hrd_parameters)(ctx, rw, current, 1, i));
+    }
+
+    return 0;
+}
+
+static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
+                                H265RawVUI *current, const H265RawSPS *sps)
+{
+    int err;
+
+    flag(aspect_ratio_info_present_flag);
+    if (current->aspect_ratio_info_present_flag) {
+        u(8, aspect_ratio_idc, 0, 255);
+        if (current->aspect_ratio_idc == 255) {
+            u(16, sar_width,  0, 65535);
+            u(16, sar_height, 0, 65535);
+        }
+    } else {
+        infer(aspect_ratio_idc, 0);
+    }
+
+    flag(overscan_info_present_flag);
+    if (current->overscan_info_present_flag)
+        flag(overscan_appropriate_flag);
+
+    flag(video_signal_type_present_flag);
+    if (current->video_signal_type_present_flag) {
+        u(3, video_format, 0, 7);
+        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);
+        } else {
+            infer(colour_primaries,         2);
+            infer(transfer_characteristics, 2);
+            infer(matrix_coefficients,      2);
+        }
+    } else {
+        infer(video_format,             5);
+        infer(video_full_range_flag,    0);
+        infer(colour_primaries,         2);
+        infer(transfer_characteristics, 2);
+        infer(matrix_coefficients,      2);
+    }
+
+    flag(chroma_loc_info_present_flag);
+    if (current->chroma_loc_info_present_flag) {
+        ue(chroma_sample_loc_type_top_field,    0, 5);
+        ue(chroma_sample_loc_type_bottom_field, 0, 5);
+    } else {
+        infer(chroma_sample_loc_type_top_field,    0);
+        infer(chroma_sample_loc_type_bottom_field, 0);
+    }
+
+    flag(neutral_chroma_indication_flag);
+    flag(field_seq_flag);
+    flag(frame_field_info_present_flag);
+
+    flag(default_display_window_flag);
+    if (current->default_display_window_flag) {
+        ue(def_disp_win_left_offset,   0, 16384);
+        ue(def_disp_win_right_offset,  0, 16384);
+        ue(def_disp_win_top_offset,    0, 16384);
+        ue(def_disp_win_bottom_offset, 0, 16384);
+    }
+
+    flag(vui_timing_info_present_flag);
+    if (current->vui_timing_info_present_flag) {
+        u(32, vui_num_units_in_tick, 1, UINT32_MAX);
+        u(32, vui_time_scale,        1, UINT32_MAX);
+        flag(vui_poc_proportional_to_timing_flag);
+        if (current->vui_poc_proportional_to_timing_flag)
+            ue(vui_num_ticks_poc_diff_one_minus1, 0, UINT32_MAX - 1);
+
+        flag(vui_hrd_parameters_present_flag);
+        if (current->vui_hrd_parameters_present_flag) {
+            CHECK(FUNC(hrd_parameters)(ctx, rw, &current->hrd_parameters,
+                                       1, sps->sps_max_sub_layers_minus1));
+        }
+    }
+
+    flag(bitstream_restriction_flag);
+    if (current->bitstream_restriction_flag) {
+        flag(tiles_fixed_structure_flag);
+        flag(motion_vectors_over_pic_boundaries_flag);
+        flag(restricted_ref_pic_lists_flag);
+        ue(min_spatial_segmentation_idc,  0, 4095);
+        ue(max_bytes_per_pic_denom,       0, 16);
+        ue(max_bits_per_min_cu_denom,     0, 16);
+        ue(log2_max_mv_length_horizontal, 0, 16);
+        ue(log2_max_mv_length_vertical,   0, 16);
+    } else {
+        infer(tiles_fixed_structure_flag,    0);
+        infer(motion_vectors_over_pic_boundaries_flag, 1);
+        infer(min_spatial_segmentation_idc,  0);
+        infer(max_bytes_per_pic_denom,       2);
+        infer(max_bits_per_min_cu_denom,     1);
+        infer(log2_max_mv_length_horizontal, 15);
+        infer(log2_max_mv_length_vertical,   15);
+    }
+
+    return 0;
+}
+
+static int FUNC(vps)(CodedBitstreamContext *ctx, RWContext *rw,
+                     H265RawVPS *current)
+{
+    int err, i, j;
+
+    HEADER("Video Parameter Set");
+
+    CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_VPS));
+
+    u(4, vps_video_parameter_set_id, 0, 15);
+
+    flag(vps_base_layer_internal_flag);
+    flag(vps_base_layer_available_flag);
+    u(6, vps_max_layers_minus1,     0, HEVC_MAX_LAYERS - 1);
+    u(3, vps_max_sub_layers_minus1, 0, HEVC_MAX_SUB_LAYERS - 1);
+    flag(vps_temporal_id_nesting_flag);
+
+    if (current->vps_max_sub_layers_minus1 == 0 &&
+        current->vps_temporal_id_nesting_flag != 1) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "
+               "vps_temporal_id_nesting_flag must be 1 if "
+               "vps_max_sub_layers_minus1 is 0.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    {
+        av_unused uint16_t ffff = 0xffff;
+        xu(16, vps_reserved_0xffff_16bits, ffff, 0xffff, 0xffff);
+    }
+
+    CHECK(FUNC(profile_tier_level)(ctx, rw, &current->profile_tier_level,
+                                   1, current->vps_max_sub_layers_minus1));
+
+    flag(vps_sub_layer_ordering_info_present_flag);
+    for (i = (current->vps_sub_layer_ordering_info_present_flag ?
+              0 : current->vps_max_sub_layers_minus1);
+         i <= current->vps_max_sub_layers_minus1; i++) {
+        ue(vps_max_dec_pic_buffering_minus1[i], 0, HEVC_MAX_DPB_SIZE - 1);
+        ue(vps_max_num_reorder_pics[i],         0, current->vps_max_dec_pic_buffering_minus1[i]);
+        ue(vps_max_latency_increase_plus1[i],   0, UINT32_MAX - 1);
+    }
+    if (!current->vps_sub_layer_ordering_info_present_flag) {
+        for (i = 0; i < current->vps_max_sub_layers_minus1; i++) {
+            infer(vps_max_dec_pic_buffering_minus1[i],
+                  current->vps_max_dec_pic_buffering_minus1[current->vps_max_sub_layers_minus1]);
+            infer(vps_max_num_reorder_pics[i],
+                  current->vps_max_num_reorder_pics[current->vps_max_sub_layers_minus1]);
+            infer(vps_max_latency_increase_plus1[i],
+                  current->vps_max_latency_increase_plus1[current->vps_max_sub_layers_minus1]);
+        }
+    }
+
+    u(6, vps_max_layer_id,        0, HEVC_MAX_LAYERS - 1);
+    ue(vps_num_layer_sets_minus1, 0, HEVC_MAX_LAYER_SETS - 1);
+    for (i = 1; i <= current->vps_num_layer_sets_minus1; i++) {
+        for (j = 0; j <= current->vps_max_layer_id; j++)
+            flag(layer_id_included_flag[i][j]);
+    }
+    for (j = 0; j <= current->vps_max_layer_id; j++)
+        infer(layer_id_included_flag[0][j], j == 0);
+
+    flag(vps_timing_info_present_flag);
+    if (current->vps_timing_info_present_flag) {
+        u(32, vps_num_units_in_tick, 1, UINT32_MAX);
+        u(32, vps_time_scale,        1, UINT32_MAX);
+        flag(vps_poc_proportional_to_timing_flag);
+        if (current->vps_poc_proportional_to_timing_flag)
+            ue(vps_num_ticks_poc_diff_one_minus1, 0, UINT32_MAX - 1);
+        ue(vps_num_hrd_parameters, 0, current->vps_num_layer_sets_minus1 + 1);
+        for (i = 0; i < current->vps_num_hrd_parameters; i++) {
+            ue(hrd_layer_set_idx[i],
+               current->vps_base_layer_internal_flag ? 0 : 1,
+               current->vps_num_layer_sets_minus1);
+            if (i > 0)
+                flag(cprms_present_flag[i]);
+            else
+                infer(cprms_present_flag[0], 1);
+
+            CHECK(FUNC(hrd_parameters)(ctx, rw, &current->hrd_parameters[i],
+                                       current->cprms_present_flag[i],
+                                       current->vps_max_sub_layers_minus1));
+        }
+    }
+
+    flag(vps_extension_flag);
+    if (current->vps_extension_flag)
+        CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));
+
+    CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
+
+    return 0;
+}
+
+static int FUNC(st_ref_pic_set)(CodedBitstreamContext *ctx, RWContext *rw,
+                                H265RawSTRefPicSet *current, int st_rps_idx,
+                                const H265RawSPS *sps)
+{
+    int err, i, j;
+
+    if (st_rps_idx != 0)
+        flag(inter_ref_pic_set_prediction_flag);
+    else
+        infer(inter_ref_pic_set_prediction_flag, 0);
+
+    if (current->inter_ref_pic_set_prediction_flag) {
+        unsigned int ref_rps_idx, num_delta_pocs;
+        const H265RawSTRefPicSet *ref;
+        int delta_rps, d_poc;
+        int ref_delta_poc_s0[HEVC_MAX_REFS], ref_delta_poc_s1[HEVC_MAX_REFS];
+        int delta_poc_s0[HEVC_MAX_REFS], delta_poc_s1[HEVC_MAX_REFS];
+        uint8_t used_by_curr_pic_s0[HEVC_MAX_REFS],
+                used_by_curr_pic_s1[HEVC_MAX_REFS];
+
+        if (st_rps_idx == sps->num_short_term_ref_pic_sets)
+            ue(delta_idx_minus1, 0, st_rps_idx - 1);
+        else
+            infer(delta_idx_minus1, 0);
+
+        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;
+
+        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);
+
+        for (j = 0; j <= num_delta_pocs; j++) {
+            flag(used_by_curr_pic_flag[j]);
+            if (!current->used_by_curr_pic_flag[j])
+                flag(use_delta_flag[j]);
+            else
+                infer(use_delta_flag[j], 1);
+        }
+
+        // Since the stored form of an RPS here is actually the delta-step
+        // form used when inter_ref_pic_set_prediction_flag is not set, we
+        // need to reconstruct that here in order to be able to refer to
+        // the RPS later (which is required for parsing, because we don't
+        // even know what syntax elements appear without it).  Therefore,
+        // this code takes the delta-step form of the reference set, turns
+        // it into the delta-array form, applies the prediction process of
+        // 7.4.8, converts the result back to the delta-step form, and
+        // stores that as the current set for future use.  Note that the
+        // inferences here mean that writers using prediction will need
+        // to fill in the delta-step values correctly as well - since the
+        // whole RPS prediction process is somewhat overly sophisticated,
+        // this hopefully forms a useful check for them to ensure their
+        // predicted form actually matches what was intended rather than
+        // an onerous additional requirement.
+
+        d_poc = 0;
+        for (i = 0; i < ref->num_negative_pics; i++) {
+            d_poc -= ref->delta_poc_s0_minus1[i] + 1;
+            ref_delta_poc_s0[i] = d_poc;
+        }
+        d_poc = 0;
+        for (i = 0; i < ref->num_positive_pics; i++) {
+            d_poc += ref->delta_poc_s1_minus1[i] + 1;
+            ref_delta_poc_s1[i] = d_poc;
+        }
+
+        i = 0;
+        for (j = ref->num_positive_pics - 1; j >= 0; j--) {
+            d_poc = ref_delta_poc_s1[j] + delta_rps;
+            if (d_poc < 0 && current->use_delta_flag[ref->num_negative_pics + j]) {
+                delta_poc_s0[i] = d_poc;
+                used_by_curr_pic_s0[i++] =
+                    current->used_by_curr_pic_flag[ref->num_negative_pics + j];
+            }
+        }
+        if (delta_rps < 0 && current->use_delta_flag[num_delta_pocs]) {
+            delta_poc_s0[i] = delta_rps;
+            used_by_curr_pic_s0[i++] =
+                current->used_by_curr_pic_flag[num_delta_pocs];
+        }
+        for (j = 0; j < ref->num_negative_pics; j++) {
+            d_poc = ref_delta_poc_s0[j] + delta_rps;
+            if (d_poc < 0 && current->use_delta_flag[j]) {
+                delta_poc_s0[i] = d_poc;
+                used_by_curr_pic_s0[i++] = current->used_by_curr_pic_flag[j];
+            }
+        }
+
+        infer(num_negative_pics, i);
+        for (i = 0; i < current->num_negative_pics; i++) {
+            infer(delta_poc_s0_minus1[i],
+                  -(delta_poc_s0[i] - (i == 0 ? 0 : delta_poc_s0[i - 1])) - 1);
+            infer(used_by_curr_pic_s0_flag[i], used_by_curr_pic_s0[i]);
+        }
+
+        i = 0;
+        for (j = ref->num_negative_pics - 1; j >= 0; j--) {
+            d_poc = ref_delta_poc_s0[j] + delta_rps;
+            if (d_poc > 0 && current->use_delta_flag[j]) {
+                delta_poc_s1[i] = d_poc;
+                used_by_curr_pic_s1[i++] = current->used_by_curr_pic_flag[j];
+            }
+        }
+        if (delta_rps > 0 && current->use_delta_flag[num_delta_pocs]) {
+            delta_poc_s1[i] = delta_rps;
+            used_by_curr_pic_s1[i++] =
+                current->used_by_curr_pic_flag[num_delta_pocs];
+        }
+        for (j = 0; j < ref->num_positive_pics; j++) {
+            d_poc = ref_delta_poc_s1[j] + delta_rps;
+            if (d_poc > 0 && current->use_delta_flag[ref->num_negative_pics + j]) {
+                delta_poc_s1[i] = d_poc;
+                used_by_curr_pic_s1[i++] =
+                    current->used_by_curr_pic_flag[ref->num_negative_pics + j];
+            }
+        }
+
+        infer(num_positive_pics, i);
+        for (i = 0; i < current->num_positive_pics; i++) {
+            infer(delta_poc_s1_minus1[i],
+                  delta_poc_s1[i] - (i == 0 ? 0 : delta_poc_s1[i - 1]) - 1);
+            infer(used_by_curr_pic_s1_flag[i], used_by_curr_pic_s1[i]);
+        }
+
+    } else {
+        ue(num_negative_pics, 0, 15);
+        ue(num_positive_pics, 0, 15 - current->num_negative_pics);
+
+        for (i = 0; i < current->num_negative_pics; i++) {
+            ue(delta_poc_s0_minus1[i], 0, INT16_MAX);
+            flag(used_by_curr_pic_s0_flag[i]);
+        }
+
+        for (i = 0; i < current->num_positive_pics; i++) {
+            ue(delta_poc_s1_minus1[i], 0, INT16_MAX);
+            flag(used_by_curr_pic_s1_flag[i]);
+        }
+    }
+
+    return 0;
+}
+
+static int FUNC(scaling_list_data)(CodedBitstreamContext *ctx, RWContext *rw,
+                                   H265RawScalingList *current)
+{
+    int sizeId, matrixId;
+    int err, n, i;
+
+    for (sizeId = 0; sizeId < 4; sizeId++) {
+        for (matrixId = 0; matrixId < 6; matrixId += (sizeId == 3 ? 3 : 1)) {
+            flag(scaling_list_pred_mode_flag[sizeId][matrixId]);
+            if (!current->scaling_list_pred_mode_flag[sizeId][matrixId]) {
+                ue(scaling_list_pred_matrix_id_delta[sizeId][matrixId],
+                   0, sizeId == 3 ? matrixId / 3 : matrixId);
+            } else {
+                n = FFMIN(64, 1 << (4 + (sizeId << 1)));
+                if (sizeId > 1)
+                    se(scaling_list_dc_coef_minus8[sizeId - 2][matrixId], -7, +247);
+                for (i = 0; i < n; i++) {
+                    xse(scaling_list_delta_coeff,
+                        current->scaling_list_delta_coeff[sizeId][matrixId][i],
+                        -128, +127);
+                }
+            }
+        }
+    }
+
+    return 0;
+}
+
+static int FUNC(sps_range_extension)(CodedBitstreamContext *ctx, RWContext *rw,
+                                     H265RawSPS *current)
+{
+    int err;
+
+    flag(transform_skip_rotation_enabled_flag);
+    flag(transform_skip_context_enabled_flag);
+    flag(implicit_rdpcm_enabled_flag);
+    flag(explicit_rdpcm_enabled_flag);
+    flag(extended_precision_processing_flag);
+    flag(intra_smoothing_disabled_flag);
+    flag(high_precision_offsets_enabled_flag);
+    flag(persistent_rice_adaptation_enabled_flag);
+    flag(cabac_bypass_alignment_enabled_flag);
+
+    return 0;
+}
+
+static int FUNC(sps_scc_extension)(CodedBitstreamContext *ctx, RWContext *rw,
+                                   H265RawSPS *current)
+{
+    int err, comp, i;
+
+    flag(sps_curr_pic_ref_enabled_flag);
+
+    flag(palette_mode_enabled_flag);
+    if (current->palette_mode_enabled_flag) {
+        ue(palette_max_size, 0, 64);
+        ue(delta_palette_max_predictor_size, 0, 128);
+
+        flag(sps_palette_predictor_initializer_present_flag);
+        if (current->sps_palette_predictor_initializer_present_flag) {
+            ue(sps_num_palette_predictor_initializer_minus1, 0, 128);
+            for (comp = 0; comp < (current->chroma_format_idc ? 3 : 1); comp++) {
+                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++)
+                    u(bit_depth, sps_palette_predictor_initializers[comp][i],
+                      0, (1 << bit_depth) - 1);
+            }
+        }
+    }
+
+    u(2, motion_vector_resolution_control_idc, 0, 2);
+    flag(intra_boundary_filtering_disable_flag);
+
+    return 0;
+}
+
+static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
+                     H265RawSPS *current)
+{
+    CodedBitstreamH265Context *h265 = ctx->priv_data;
+    const H265RawVPS *vps;
+    int err, i;
+    unsigned int min_cb_log2_size_y, ctb_log2_size_y,
+                 min_cb_size_y,   min_tb_log2_size_y;
+
+    HEADER("Sequence Parameter Set");
+
+    CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_SPS));
+
+    u(4, sps_video_parameter_set_id, 0, 15);
+    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);
+    flag(sps_temporal_id_nesting_flag);
+    if (vps) {
+        if (vps->vps_max_sub_layers_minus1 > current->sps_max_sub_layers_minus1) {
+            av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "
+                   "sps_max_sub_layers_minus1 (%d) must be less than or equal to "
+                   "vps_max_sub_layers_minus1 (%d).\n",
+                   vps->vps_max_sub_layers_minus1,
+                   current->sps_max_sub_layers_minus1);
+            return AVERROR_INVALIDDATA;
+        }
+        if (vps->vps_temporal_id_nesting_flag &&
+            !current->sps_temporal_id_nesting_flag) {
+            av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid stream: "
+                   "sps_temporal_id_nesting_flag must be 1 if "
+                   "vps_temporal_id_nesting_flag is 1.\n");
+            return AVERROR_INVALIDDATA;
+        }
+    }
+
+    CHECK(FUNC(profile_tier_level)(ctx, rw, &current->profile_tier_level,
+                                   1, current->sps_max_sub_layers_minus1));
+
+    ue(sps_seq_parameter_set_id, 0, 15);
+
+    ue(chroma_format_idc, 0, 3);
+    if (current->chroma_format_idc == 3)
+        flag(separate_colour_plane_flag);
+    else
+        infer(separate_colour_plane_flag, 0);
+
+    ue(pic_width_in_luma_samples,  1, HEVC_MAX_WIDTH);
+    ue(pic_height_in_luma_samples, 1, HEVC_MAX_HEIGHT);
+
+    flag(conformance_window_flag);
+    if (current->conformance_window_flag) {
+        ue(conf_win_left_offset,   0, current->pic_width_in_luma_samples);
+        ue(conf_win_right_offset,  0, current->pic_width_in_luma_samples);
+        ue(conf_win_top_offset,    0, current->pic_height_in_luma_samples);
+        ue(conf_win_bottom_offset, 0, current->pic_height_in_luma_samples);
+    } else {
+        infer(conf_win_left_offset,   0);
+        infer(conf_win_right_offset,  0);
+        infer(conf_win_top_offset,    0);
+        infer(conf_win_bottom_offset, 0);
+    }
+
+    ue(bit_depth_luma_minus8,   0, 8);
+    ue(bit_depth_chroma_minus8, 0, 8);
+
+    ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12);
+
+    flag(sps_sub_layer_ordering_info_present_flag);
+    for (i = (current->sps_sub_layer_ordering_info_present_flag ?
+              0 : current->sps_max_sub_layers_minus1);
+         i <= current->sps_max_sub_layers_minus1; i++) {
+        ue(sps_max_dec_pic_buffering_minus1[i], 0, HEVC_MAX_DPB_SIZE - 1);
+        ue(sps_max_num_reorder_pics[i],         0, current->sps_max_dec_pic_buffering_minus1[i]);
+        ue(sps_max_latency_increase_plus1[i],   0, UINT32_MAX - 1);
+    }
+    if (!current->sps_sub_layer_ordering_info_present_flag) {
+        for (i = 0; i < current->sps_max_sub_layers_minus1; i++) {
+            infer(sps_max_dec_pic_buffering_minus1[i],
+                  current->sps_max_dec_pic_buffering_minus1[current->sps_max_sub_layers_minus1]);
+            infer(sps_max_num_reorder_pics[i],
+                  current->sps_max_num_reorder_pics[current->sps_max_sub_layers_minus1]);
+            infer(sps_max_latency_increase_plus1[i],
+                  current->sps_max_latency_increase_plus1[current->sps_max_sub_layers_minus1]);
+        }
+    }
+
+    ue(log2_min_luma_coding_block_size_minus3,   0, 3);
+    min_cb_log2_size_y = current->log2_min_luma_coding_block_size_minus3 + 3;
+
+    ue(log2_diff_max_min_luma_coding_block_size, 0, 3);
+    ctb_log2_size_y = min_cb_log2_size_y +
+        current->log2_diff_max_min_luma_coding_block_size;
+
+    min_cb_size_y = 1 << min_cb_log2_size_y;
+    if (current->pic_width_in_luma_samples  % min_cb_size_y ||
+        current->pic_height_in_luma_samples % min_cb_size_y) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid dimensions: %ux%u not divisible "
+               "by MinCbSizeY = %u.\n", current->pic_width_in_luma_samples,
+               current->pic_height_in_luma_samples, min_cb_size_y);
+        return AVERROR_INVALIDDATA;
+    }
+
+    ue(log2_min_luma_transform_block_size_minus2, 0, min_cb_log2_size_y - 3);
+    min_tb_log2_size_y = current->log2_min_luma_transform_block_size_minus2 + 2;
+
+    ue(log2_diff_max_min_luma_transform_block_size,
+       0, FFMIN(ctb_log2_size_y, 5) - min_tb_log2_size_y);
+
+    ue(max_transform_hierarchy_depth_inter,
+       0, ctb_log2_size_y - min_tb_log2_size_y);
+    ue(max_transform_hierarchy_depth_intra,
+       0, ctb_log2_size_y - min_tb_log2_size_y);
+
+    flag(scaling_list_enabled_flag);
+    if (current->scaling_list_enabled_flag) {
+        flag(sps_scaling_list_data_present_flag);
+        if (current->sps_scaling_list_data_present_flag)
+            CHECK(FUNC(scaling_list_data)(ctx, rw, &current->scaling_list));
+    } else {
+        infer(sps_scaling_list_data_present_flag, 0);
+    }
+
+    flag(amp_enabled_flag);
+    flag(sample_adaptive_offset_enabled_flag);
+
+    flag(pcm_enabled_flag);
+    if (current->pcm_enabled_flag) {
+        u(4, pcm_sample_bit_depth_luma_minus1,
+          0, current->bit_depth_luma_minus8 + 8 - 1);
+        u(4, pcm_sample_bit_depth_chroma_minus1,
+          0, current->bit_depth_chroma_minus8 + 8 - 1);
+
+        ue(log2_min_pcm_luma_coding_block_size_minus3,
+           FFMIN(min_cb_log2_size_y, 5) - 3, FFMIN(ctb_log2_size_y, 5) - 3);
+        ue(log2_diff_max_min_pcm_luma_coding_block_size,
+           0, FFMIN(ctb_log2_size_y, 5) - (current->log2_min_pcm_luma_coding_block_size_minus3 + 3));
+
+        flag(pcm_loop_filter_disabled_flag);
+    }
+
+    ue(num_short_term_ref_pic_sets, 0, HEVC_MAX_SHORT_TERM_REF_PIC_SETS);
+    for (i = 0; i < current->num_short_term_ref_pic_sets; i++)
+        CHECK(FUNC(st_ref_pic_set)(ctx, rw, &current->st_ref_pic_set[i], i, current));
+
+    flag(long_term_ref_pics_present_flag);
+    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++) {
+            u(current->log2_max_pic_order_cnt_lsb_minus4 + 4,
+              lt_ref_pic_poc_lsb_sps[i],
+              0, (1 << (current->log2_max_pic_order_cnt_lsb_minus4 + 4)) - 1);
+            flag(used_by_curr_pic_lt_sps_flag[i]);
+        }
+    }
+
+    flag(sps_temporal_mvp_enabled_flag);
+    flag(strong_intra_smoothing_enabled_flag);
+
+    flag(vui_parameters_present_flag);
+    if (current->vui_parameters_present_flag)
+        CHECK(FUNC(vui_parameters)(ctx, rw, &current->vui, current));
+
+    flag(sps_extension_present_flag);
+    if (current->sps_extension_present_flag) {
+        flag(sps_range_extension_flag);
+        flag(sps_multilayer_extension_flag);
+        flag(sps_3d_extension_flag);
+        flag(sps_scc_extension_flag);
+        u(4, sps_extension_4bits, 0, (1 << 4) - 1);
+    }
+
+    if (current->sps_range_extension_flag)
+        CHECK(FUNC(sps_range_extension)(ctx, rw, current));
+    if (current->sps_multilayer_extension_flag)
+        return AVERROR_PATCHWELCOME;
+    if (current->sps_3d_extension_flag)
+        return AVERROR_PATCHWELCOME;
+    if (current->sps_scc_extension_flag)
+        CHECK(FUNC(sps_scc_extension)(ctx, rw, current));
+    if (current->sps_extension_4bits)
+        CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));
+
+    CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
+
+    return 0;
+}
+
+static int FUNC(pps_range_extension)(CodedBitstreamContext *ctx, RWContext *rw,
+                                     H265RawPPS *current)
+{
+    CodedBitstreamH265Context *h265 = ctx->priv_data;
+    const H265RawSPS *sps = h265->active_sps;
+    int err, i;
+
+    if (current->transform_skip_enabled_flag)
+        ue(log2_max_transform_skip_block_size_minus2, 0, 3);
+    flag(cross_component_prediction_enabled_flag);
+
+    flag(chroma_qp_offset_list_enabled_flag);
+    if (current->chroma_qp_offset_list_enabled_flag) {
+        ue(diff_cu_chroma_qp_offset_depth,
+           0, sps->log2_diff_max_min_luma_coding_block_size);
+        ue(chroma_qp_offset_list_len_minus1, 0, 5);
+        for (i = 0; i <= current->chroma_qp_offset_list_len_minus1; i++) {
+            se(cb_qp_offset_list[i], -12, +12);
+            se(cr_qp_offset_list[i], -12, +12);
+        }
+    }
+
+    ue(log2_sao_offset_scale_luma,   0, FFMAX(0, sps->bit_depth_luma_minus8   - 2));
+    ue(log2_sao_offset_scale_chroma, 0, FFMAX(0, sps->bit_depth_chroma_minus8 - 2));
+
+    return 0;
+}
+
+static int FUNC(pps_scc_extension)(CodedBitstreamContext *ctx, RWContext *rw,
+                                   H265RawPPS *current)
+{
+    int err, comp, i;
+
+    flag(pps_curr_pic_ref_enabled_flag);
+
+    flag(residual_adaptive_colour_transform_enabled_flag);
+    if (current->residual_adaptive_colour_transform_enabled_flag) {
+        flag(pps_slice_act_qp_offsets_present_flag);
+        se(pps_act_y_qp_offset_plus5,  -7, +17);
+        se(pps_act_cb_qp_offset_plus5, -7, +17);
+        se(pps_act_cr_qp_offset_plus3, -9, +15);
+    } else {
+        infer(pps_slice_act_qp_offsets_present_flag, 0);
+        infer(pps_act_y_qp_offset_plus5,  0);
+        infer(pps_act_cb_qp_offset_plus5, 0);
+        infer(pps_act_cr_qp_offset_plus3, 0);
+    }
+
+    flag(pps_palette_predictor_initializer_present_flag);
+    if (current->pps_palette_predictor_initializer_present_flag) {
+        ue(pps_num_palette_predictor_initializer, 0, 128);
+        if (current->pps_num_palette_predictor_initializer > 0) {
+            flag(monochrome_palette_flag);
+            ue(luma_bit_depth_entry_minus8, 0, 8);
+            if (!current->monochrome_palette_flag)
+                ue(chroma_bit_depth_entry_minus8, 0, 8);
+            for (comp = 0; comp < (current->monochrome_palette_flag ? 1 : 3); comp++) {
+                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++)
+                    u(bit_depth, pps_palette_predictor_initializers[comp][i],
+                      0, (1 << bit_depth) - 1);
+            }
+        }
+    }
+
+    return 0;
+}
+
+static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw,
+                     H265RawPPS *current)
+{
+    CodedBitstreamH265Context *h265 = ctx->priv_data;
+    const H265RawSPS *sps;
+    int err, i;
+
+    HEADER("Picture Parameter Set");
+
+    CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_PPS));
+
+    ue(pps_pic_parameter_set_id, 0, 63);
+    ue(pps_seq_parameter_set_id, 0, 15);
+    sps = h265->sps[current->pps_seq_parameter_set_id];
+    if (!sps) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
+               current->pps_seq_parameter_set_id);
+        return AVERROR_INVALIDDATA;
+    }
+    h265->active_sps = sps;
+
+    flag(dependent_slice_segments_enabled_flag);
+    flag(output_flag_present_flag);
+    u(3, num_extra_slice_header_bits, 0, 7);
+    flag(sign_data_hiding_enabled_flag);
+    flag(cabac_init_present_flag);
+
+    ue(num_ref_idx_l0_default_active_minus1, 0, 14);
+    ue(num_ref_idx_l1_default_active_minus1, 0, 14);
+
+    se(init_qp_minus26, -(26 + 6 * sps->bit_depth_luma_minus8), +25);
+
+    flag(constrained_intra_pred_flag);
+    flag(transform_skip_enabled_flag);
+    flag(cu_qp_delta_enabled_flag);
+    if (current->cu_qp_delta_enabled_flag)
+        ue(diff_cu_qp_delta_depth,
+           0, sps->log2_diff_max_min_luma_coding_block_size);
+    else
+        infer(diff_cu_qp_delta_depth, 0);
+
+    se(pps_cb_qp_offset, -12, +12);
+    se(pps_cr_qp_offset, -12, +12);
+    flag(pps_slice_chroma_qp_offsets_present_flag);
+
+    flag(weighted_pred_flag);
+    flag(weighted_bipred_flag);
+
+    flag(transquant_bypass_enabled_flag);
+    flag(tiles_enabled_flag);
+    flag(entropy_coding_sync_enabled_flag);
+
+    if (current->tiles_enabled_flag) {
+        ue(num_tile_columns_minus1, 0, HEVC_MAX_TILE_COLUMNS);
+        ue(num_tile_rows_minus1,    0, HEVC_MAX_TILE_ROWS);
+        flag(uniform_spacing_flag);
+        if (!current->uniform_spacing_flag) {
+            for (i = 0; i < current->num_tile_columns_minus1; i++)
+                ue(column_width_minus1[i], 0, sps->pic_width_in_luma_samples);
+            for (i = 0; i < current->num_tile_rows_minus1; i++)
+                ue(row_height_minus1[i],   0, sps->pic_height_in_luma_samples);
+        }
+        flag(loop_filter_across_tiles_enabled_flag);
+    } else {
+        infer(num_tile_columns_minus1, 0);
+        infer(num_tile_rows_minus1,    0);
+    }
+
+    flag(pps_loop_filter_across_slices_enabled_flag);
+    flag(deblocking_filter_control_present_flag);
+    if (current->deblocking_filter_control_present_flag) {
+        flag(deblocking_filter_override_enabled_flag);
+        flag(pps_deblocking_filter_disabled_flag);
+        if (!current->pps_deblocking_filter_disabled_flag) {
+            se(pps_beta_offset_div2, -6, +6);
+            se(pps_tc_offset_div2,   -6, +6);
+        } else {
+            infer(pps_beta_offset_div2, 0);
+            infer(pps_tc_offset_div2,   0);
+        }
+    } else {
+        infer(deblocking_filter_override_enabled_flag, 0);
+        infer(pps_deblocking_filter_disabled_flag,     0);
+        infer(pps_beta_offset_div2, 0);
+        infer(pps_tc_offset_div2,   0);
+    }
+
+    flag(pps_scaling_list_data_present_flag);
+    if (current->pps_scaling_list_data_present_flag)
+        CHECK(FUNC(scaling_list_data)(ctx, rw, &current->scaling_list));
+
+    flag(lists_modification_present_flag);
+
+    ue(log2_parallel_merge_level_minus2,
+       0, (sps->log2_min_luma_coding_block_size_minus3 + 3 +
+           sps->log2_diff_max_min_luma_coding_block_size - 2));
+
+    flag(slice_segment_header_extension_present_flag);
+
+    flag(pps_extension_present_flag);
+    if (current->pps_extension_present_flag) {
+        flag(pps_range_extension_flag);
+        flag(pps_multilayer_extension_flag);
+        flag(pps_3d_extension_flag);
+        flag(pps_scc_extension_flag);
+        u(4, pps_extension_4bits, 0, (1 << 4) - 1);
+    }
+    if (current->pps_range_extension_flag)
+        CHECK(FUNC(pps_range_extension)(ctx, rw, current));
+    if (current->pps_multilayer_extension_flag)
+        return AVERROR_PATCHWELCOME;
+    if (current->pps_3d_extension_flag)
+        return AVERROR_PATCHWELCOME;
+    if (current->pps_scc_extension_flag)
+        CHECK(FUNC(pps_scc_extension)(ctx, rw, current));
+    if (current->pps_extension_4bits)
+        CHECK(FUNC(extension_data)(ctx, rw, &current->extension_data));
+
+    CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
+
+    return 0;
+}
+
+static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,
+                     H265RawAUD *current)
+{
+    int err;
+
+    HEADER("Access Unit Delimiter");
+
+    CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, HEVC_NAL_AUD));
+
+    u(3, pic_type, 0, 2);
+
+    CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
+
+    return 0;
+}
+
+static int FUNC(ref_pic_lists_modification)(CodedBitstreamContext *ctx, RWContext *rw,
+                                            H265RawSliceHeader *current,
+                                            unsigned int num_pic_total_curr)
+{
+    unsigned int entry_size;
+    int err, i;
+
+    entry_size = av_log2(num_pic_total_curr - 1) + 1;
+
+    flag(ref_pic_list_modification_flag_l0);
+    if (current->ref_pic_list_modification_flag_l0) {
+        for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++)
+            u(entry_size, list_entry_l0[i], 0, num_pic_total_curr - 1);
+    }
+
+    if (current->slice_type == HEVC_SLICE_B) {
+        flag(ref_pic_list_modification_flag_l1);
+        if (current->ref_pic_list_modification_flag_l1) {
+            for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++)
+                u(entry_size, list_entry_l1[i], 0, num_pic_total_curr - 1);
+        }
+    }
+
+    return 0;
+}
+
+static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,
+                                   H265RawSliceHeader *current)
+{
+    CodedBitstreamH265Context *h265 = ctx->priv_data;
+    const H265RawSPS *sps = h265->active_sps;
+    int err, i, j;
+    int chroma = !sps->separate_colour_plane_flag &&
+                  sps->chroma_format_idc != 0;
+
+    ue(luma_log2_weight_denom, 0, 7);
+    if (chroma)
+        se(delta_chroma_log2_weight_denom, -7, 7);
+    else
+        infer(delta_chroma_log2_weight_denom, 0);
+
+    for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
+        if (1 /* is not same POC and same layer_id */)
+            flag(luma_weight_l0_flag[i]);
+        else
+            infer(luma_weight_l0_flag[i], 0);
+    }
+    if (chroma) {
+        for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
+            if (1 /* is not same POC and same layer_id */)
+                flag(chroma_weight_l0_flag[i]);
+            else
+                infer(chroma_weight_l0_flag[i], 0);
+        }
+    }
+
+    for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
+        if (current->luma_weight_l0_flag[i]) {
+            se(delta_luma_weight_l0[i], -128, +127);
+            se(luma_offset_l0[i],
+               -(1 << (sps->bit_depth_luma_minus8 + 8 - 1)),
+               ((1 << (sps->bit_depth_luma_minus8 + 8 - 1)) - 1));
+        } else {
+            infer(delta_luma_weight_l0[i], 0);
+            infer(luma_offset_l0[i],       0);
+        }
+        if (current->chroma_weight_l0_flag[i]) {
+            for (j = 0; j < 2; j++) {
+                se(delta_chroma_weight_l0[i][j], -128, +127);
+                se(chroma_offset_l0[i][j],
+                   -(4 << (sps->bit_depth_chroma_minus8 + 8 - 1)),
+                   ((4 << (sps->bit_depth_chroma_minus8 + 8 - 1)) - 1));
+            }
+        } else {
+            for (j = 0; j < 2; j++) {
+                infer(delta_chroma_weight_l0[i][j], 0);
+                infer(chroma_offset_l0[i][j],       0);
+            }
+        }
+    }
+
+    if (current->slice_type == HEVC_SLICE_B) {
+        for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
+            if (1 /* RefPicList1[i] is not CurrPic, nor is it in a different layer */)
+                flag(luma_weight_l1_flag[i]);
+            else
+                infer(luma_weight_l1_flag[i], 0);
+        }
+        if (chroma) {
+            for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
+                if (1 /* RefPicList1[i] is not CurrPic, nor is it in a different layer */)
+                    flag(chroma_weight_l1_flag[i]);
+                else
+                    infer(chroma_weight_l1_flag[i], 0);
+            }
+        }
+
+        for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
+            if (current->luma_weight_l1_flag[i]) {
+                se(delta_luma_weight_l1[i], -128, +127);
+                se(luma_offset_l1[i],
+                   -(1 << (sps->bit_depth_luma_minus8 + 8 - 1)),
+                   ((1 << (sps->bit_depth_luma_minus8 + 8 - 1)) - 1));
+            } else {
+                infer(delta_luma_weight_l1[i], 0);
+                infer(luma_offset_l1[i],       0);
+            }
+            if (current->chroma_weight_l1_flag[i]) {
+                for (j = 0; j < 2; j++) {
+                    se(delta_chroma_weight_l1[i][j], -128, +127);
+                    se(chroma_offset_l1[i][j],
+                       -(4 << (sps->bit_depth_chroma_minus8 + 8 - 1)),
+                       ((4 << (sps->bit_depth_chroma_minus8 + 8 - 1)) - 1));
+                }
+            } else {
+                for (j = 0; j < 2; j++) {
+                    infer(delta_chroma_weight_l1[i][j], 0);
+                    infer(chroma_offset_l1[i][j],       0);
+                }
+            }
+        }
+    }
+
+    return 0;
+}
+
+static int FUNC(slice_segment_header)(CodedBitstreamContext *ctx, RWContext *rw,
+                                      H265RawSliceHeader *current)
+{
+    CodedBitstreamH265Context *h265 = ctx->priv_data;
+    const H265RawSPS *sps;
+    const H265RawPPS *pps;
+    unsigned int min_cb_log2_size_y, ctb_log2_size_y, ctb_size_y;
+    unsigned int pic_width_in_ctbs_y, pic_height_in_ctbs_y, pic_size_in_ctbs_y;
+    unsigned int num_pic_total_curr = 0;
+    int err, i;
+
+    HEADER("Slice Segment Header");
+
+    CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header, -1));
+
+    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)
+        flag(no_output_of_prior_pics_flag);
+
+    ue(slice_pic_parameter_set_id, 0, 63);
+
+    pps = h265->pps[current->slice_pic_parameter_set_id];
+    if (!pps) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",
+               current->slice_pic_parameter_set_id);
+        return AVERROR_INVALIDDATA;
+    }
+    h265->active_pps = pps;
+
+    sps = h265->sps[pps->pps_seq_parameter_set_id];
+    if (!sps) {
+        av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
+               pps->pps_seq_parameter_set_id);
+        return AVERROR_INVALIDDATA;
+    }
+    h265->active_sps = sps;
+
+    min_cb_log2_size_y = sps->log2_min_luma_coding_block_size_minus3 + 3;
+    ctb_log2_size_y = min_cb_log2_size_y + sps->log2_diff_max_min_luma_coding_block_size;
+    ctb_size_y = 1 << ctb_log2_size_y;
+    pic_width_in_ctbs_y =
+        (sps->pic_width_in_luma_samples + ctb_size_y - 1) / ctb_size_y;
+    pic_height_in_ctbs_y =
+        (sps->pic_height_in_luma_samples + ctb_size_y - 1) / ctb_size_y;
+    pic_size_in_ctbs_y = pic_width_in_ctbs_y * pic_height_in_ctbs_y;
+
+    if (!current->first_slice_segment_in_pic_flag) {
+        unsigned int address_size = av_log2(pic_size_in_ctbs_y - 1) + 1;
+        if (pps->dependent_slice_segments_enabled_flag)
+            flag(dependent_slice_segment_flag);
+        else
+            infer(dependent_slice_segment_flag, 0);
+        u(address_size, slice_segment_address, 0, pic_size_in_ctbs_y - 1);
+    } else {
+        infer(dependent_slice_segment_flag, 0);
+    }
+
+    if (!current->dependent_slice_segment_flag) {
+        for (i = 0; i < pps->num_extra_slice_header_bits; i++)
+            flag(slice_reserved_flag[i]);
+
+        ue(slice_type, 0, 2);
+
+        if (pps->output_flag_present_flag)
+            flag(pic_output_flag);
+
+        if (sps->separate_colour_plane_flag)
+            u(2, colour_plane_id, 0, 2);
+
+        if (current->nal_unit_header.nal_unit_type != HEVC_NAL_IDR_W_RADL &&
+            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, (1 << (sps->log2_max_pic_order_cnt_lsb_minus4 + 4)) - 1);
+
+            flag(short_term_ref_pic_set_sps_flag);
+            if (!current->short_term_ref_pic_set_sps_flag) {
+                CHECK(FUNC(st_ref_pic_set)(ctx, rw, &current->short_term_ref_pic_set,
+                                           sps->num_short_term_ref_pic_sets, sps));
+                rps = &current->short_term_ref_pic_set;
+            } else if (sps->num_short_term_ref_pic_sets > 1) {
+                unsigned int idx_size = av_log2(sps->num_short_term_ref_pic_sets - 1) + 1;
+                u(idx_size, short_term_ref_pic_set_idx,
+                  0, sps->num_short_term_ref_pic_sets - 1);
+                rps = &sps->st_ref_pic_set[current->short_term_ref_pic_set_idx];
+            } else {
+                infer(short_term_ref_pic_set_idx, 0);
+                rps = &sps->st_ref_pic_set[0];
+            }
+
+            num_pic_total_curr = 0;
+            for (i = 0; i < rps->num_negative_pics; i++)
+                if (rps->used_by_curr_pic_s0_flag[i])
+                    ++num_pic_total_curr;
+            for (i = 0; i < rps->num_positive_pics; i++)
+                if (rps->used_by_curr_pic_s1_flag[i])
+                    ++num_pic_total_curr;
+
+            if (sps->long_term_ref_pics_present_flag) {
+                unsigned int idx_size;
+
+                if (sps->num_long_term_ref_pics_sps > 0) {
+                    ue(num_long_term_sps, 0, sps->num_long_term_ref_pics_sps);
+                    idx_size = av_log2(sps->num_long_term_ref_pics_sps - 1) + 1;
+                } else {
+                    infer(num_long_term_sps, 0);
+                    idx_size = 0;
+                }
+                ue(num_long_term_pics, 0, HEVC_MAX_LONG_TERM_REF_PICS);
+
+                for (i = 0; i < current->num_long_term_sps +
+                                current->num_long_term_pics; i++) {
+                    if (i < current->num_long_term_sps) {
+                        if (sps->num_long_term_ref_pics_sps > 1)
+                            u(idx_size, lt_idx_sps[i],
+                              0, sps->num_long_term_ref_pics_sps - 1);
+                        if (sps->used_by_curr_pic_lt_sps_flag[current->lt_idx_sps[i]])
+                            ++num_pic_total_curr;
+                    } else {
+                        u(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, poc_lsb_lt[i],
+                          0, (1 << (sps->log2_max_pic_order_cnt_lsb_minus4 + 4)) - 1);
+                        flag(used_by_curr_pic_lt_flag[i]);
+                        if (current->used_by_curr_pic_lt_flag[i])
+                            ++num_pic_total_curr;
+                    }
+                    flag(delta_poc_msb_present_flag[i]);
+                    if (current->delta_poc_msb_present_flag[i])
+                        ue(delta_poc_msb_cycle_lt[i], 0, UINT32_MAX - 1);
+                    else
+                        infer(delta_poc_msb_cycle_lt[i], 0);
+                }
+            }
+
+            if (sps->sps_temporal_mvp_enabled_flag)
+                flag(slice_temporal_mvp_enabled_flag);
+            else
+                infer(slice_temporal_mvp_enabled_flag, 0);
+
+            if (pps->pps_curr_pic_ref_enabled_flag)
+                ++num_pic_total_curr;
+        }
+
+        if (sps->sample_adaptive_offset_enabled_flag) {
+            flag(slice_sao_luma_flag);
+            if (!sps->separate_colour_plane_flag && sps->chroma_format_idc != 0)
+                flag(slice_sao_chroma_flag);
+            else
+                infer(slice_sao_chroma_flag, 0);
+        } else {
+            infer(slice_sao_luma_flag,   0);
+            infer(slice_sao_chroma_flag, 0);
+        }
+
+        if (current->slice_type == HEVC_SLICE_P ||
+            current->slice_type == HEVC_SLICE_B) {
+            flag(num_ref_idx_active_override_flag);
+            if (current->num_ref_idx_active_override_flag) {
+                ue(num_ref_idx_l0_active_minus1, 0, 14);
+                if (current->slice_type == HEVC_SLICE_B)
+                    ue(num_ref_idx_l1_active_minus1, 0, 14);
+                else
+                    infer(num_ref_idx_l1_active_minus1, pps->num_ref_idx_l1_default_active_minus1);
+            } else {
+                infer(num_ref_idx_l0_active_minus1, pps->num_ref_idx_l0_default_active_minus1);
+                infer(num_ref_idx_l1_active_minus1, pps->num_ref_idx_l1_default_active_minus1);
+            }
+
+            if (pps->lists_modification_present_flag && num_pic_total_curr > 1)
+                CHECK(FUNC(ref_pic_lists_modification)(ctx, rw, current,
+                                                       num_pic_total_curr));
+
+            if (current->slice_type == HEVC_SLICE_B)
+                flag(mvd_l1_zero_flag);
+            if (pps->cabac_init_present_flag)
+                flag(cabac_init_flag);
+            else
+                infer(cabac_init_flag, 0);
+            if (current->slice_temporal_mvp_enabled_flag) {
+                if (current->slice_type == HEVC_SLICE_B)
+                    flag(collocated_from_l0_flag);
+                else
+                    infer(collocated_from_l0_flag, 1);
+                if (current->collocated_from_l0_flag) {
+                    if (current->num_ref_idx_l0_active_minus1 > 0)
+                        ue(collocated_ref_idx, 0, current->num_ref_idx_l0_active_minus1);
+                    else
+                        infer(collocated_ref_idx, 0);
+                } else {
+                    if (current->num_ref_idx_l1_active_minus1 > 0)
+                        ue(collocated_ref_idx, 0, current->num_ref_idx_l1_active_minus1);
+                    else
+                        infer(collocated_ref_idx, 0);
+                }
+            }
+
+            if ((pps->weighted_pred_flag   && current->slice_type == HEVC_SLICE_P) ||
+                (pps->weighted_bipred_flag && current->slice_type == HEVC_SLICE_B))
+                CHECK(FUNC(pred_weight_table)(ctx, rw, current));
+
+            ue(five_minus_max_num_merge_cand, 0, 4);
+            if (sps->motion_vector_resolution_control_idc == 2)
+                flag(use_integer_mv_flag);
+            else
+                infer(use_integer_mv_flag, sps->motion_vector_resolution_control_idc);
+        }
+
+        se(slice_qp_delta,
+           - 6 * sps->bit_depth_luma_minus8 - (pps->init_qp_minus26 + 26),
+           + 51 - (pps->init_qp_minus26 + 26));
+        if (pps->pps_slice_chroma_qp_offsets_present_flag) {
+            se(slice_cb_qp_offset, -12, +12);
+            se(slice_cr_qp_offset, -12, +12);
+        } else {
+            infer(slice_cb_qp_offset, 0);
+            infer(slice_cr_qp_offset, 0);
+        }
+        if (pps->pps_slice_act_qp_offsets_present_flag) {
+            se(slice_act_y_qp_offset,
+               -12 - (pps->pps_act_y_qp_offset_plus5 - 5),
+               +12 - (pps->pps_act_y_qp_offset_plus5 - 5));
+            se(slice_act_cb_qp_offset,
+               -12 - (pps->pps_act_cb_qp_offset_plus5 - 5),
+               +12 - (pps->pps_act_cb_qp_offset_plus5 - 5));
+            se(slice_act_cr_qp_offset,
+               -12 - (pps->pps_act_cr_qp_offset_plus3 - 3),
+               +12 - (pps->pps_act_cr_qp_offset_plus3 - 3));
+        } else {
+            infer(slice_act_y_qp_offset,  0);
+            infer(slice_act_cb_qp_offset, 0);
+            infer(slice_act_cr_qp_offset, 0);
+        }
+        if (pps->chroma_qp_offset_list_enabled_flag)
+            flag(cu_chroma_qp_offset_enabled_flag);
+        else
+            infer(cu_chroma_qp_offset_enabled_flag, 0);
+
+        if (pps->deblocking_filter_override_enabled_flag)
+            flag(deblocking_filter_override_flag);
+        else
+            infer(deblocking_filter_override_flag, 0);
+        if (current->deblocking_filter_override_flag) {
+            flag(slice_deblocking_filter_disabled_flag);
+            if (!current->slice_deblocking_filter_disabled_flag) {
+                se(slice_beta_offset_div2, -6, +6);
+                se(slice_tc_offset_div2,   -6, +6);
+            } else {
+                infer(slice_beta_offset_div2, pps->pps_beta_offset_div2);
+                infer(slice_tc_offset_div2,   pps->pps_tc_offset_div2);
+            }
+        } else {
+            infer(slice_deblocking_filter_disabled_flag,
+                  pps->pps_deblocking_filter_disabled_flag);
+            infer(slice_beta_offset_div2, pps->pps_beta_offset_div2);
+            infer(slice_tc_offset_div2,   pps->pps_tc_offset_div2);
+        }
+        if (pps->pps_loop_filter_across_slices_enabled_flag &&
+            (current->slice_sao_luma_flag || current->slice_sao_chroma_flag ||
+             !current->slice_deblocking_filter_disabled_flag))
+            flag(slice_loop_filter_across_slices_enabled_flag);
+        else
+            infer(slice_loop_filter_across_slices_enabled_flag,
+                  pps->pps_loop_filter_across_slices_enabled_flag);
+    }
+
+    if (pps->tiles_enabled_flag || pps->entropy_coding_sync_enabled_flag) {
+        unsigned int num_entry_point_offsets_limit;
+        if (!pps->tiles_enabled_flag && pps->entropy_coding_sync_enabled_flag)
+            num_entry_point_offsets_limit = pic_height_in_ctbs_y - 1;
+        else if (pps->tiles_enabled_flag && !pps->entropy_coding_sync_enabled_flag)
+            num_entry_point_offsets_limit =
+                (pps->num_tile_columns_minus1 + 1) * (pps->num_tile_rows_minus1 + 1);
+        else
+            num_entry_point_offsets_limit =
+                (pps->num_tile_columns_minus1 + 1) * pic_height_in_ctbs_y - 1;
+        ue(num_entry_point_offsets, 0, num_entry_point_offsets_limit);
+
+        if (current->num_entry_point_offsets > HEVC_MAX_ENTRY_POINT_OFFSETS) {
+            av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many entry points: "
+                   "%"PRIu16".\n", current->num_entry_point_offsets);
+            return AVERROR_PATCHWELCOME;
+        }
+
+        if (current->num_entry_point_offsets > 0) {
+            ue(offset_len_minus1, 0, 31);
+            for (i = 0; i < current->num_entry_point_offsets; i++)
+                u(current->offset_len_minus1 + 1, entry_point_offset_minus1[i],
+                  0, (1 << (current->offset_len_minus1 + 1)) - 1);
+        }
+    }
+
+    if (pps->slice_segment_header_extension_present_flag) {
+        ue(slice_segment_header_extension_length, 0, 256);
+        for (i = 0; i < current->slice_segment_header_extension_length; i++)
+            u(8, slice_segment_header_extension_data_byte[i], 0x00, 0xff);
+    }
+
+    CHECK(FUNC(byte_alignment)(ctx, rw));
+
+    return 0;
+}