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Copy pathcbs_av1_syntax_template.c
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cbs_av1_syntax_template.c
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/*
* 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(obu_header)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawOBUHeader *current)
{
int err;
HEADER("OBU header");
fc(1, obu_forbidden_bit, 0, 0);
fc(4, obu_type, 0, AV1_OBU_PADDING);
flag(obu_extension_flag);
flag(obu_has_size_field);
fc(1, obu_reserved_1bit, 0, 0);
if (current->obu_extension_flag) {
fb(3, temporal_id);
fb(2, spatial_id);
fc(3, extension_header_reserved_3bits, 0, 0);
}
return 0;
}
static int FUNC(trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw, int nb_bits)
{
int err;
av_assert0(nb_bits > 0);
fixed(1, trailing_one_bit, 1);
--nb_bits;
while (nb_bits > 0) {
fixed(1, trailing_zero_bit, 0);
--nb_bits;
}
return 0;
}
static int FUNC(byte_alignment)(CodedBitstreamContext *ctx, RWContext *rw)
{
int err;
while (byte_alignment(rw) != 0)
fixed(1, zero_bit, 0);
return 0;
}
static int FUNC(color_config)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawColorConfig *current, int seq_profile)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
int err;
flag(high_bitdepth);
if (seq_profile == FF_PROFILE_AV1_PROFESSIONAL &&
current->high_bitdepth) {
flag(twelve_bit);
priv->bit_depth = current->twelve_bit ? 12 : 10;
} else {
priv->bit_depth = current->high_bitdepth ? 10 : 8;
}
if (seq_profile == FF_PROFILE_AV1_HIGH)
infer(mono_chrome, 0);
else
flag(mono_chrome);
priv->num_planes = current->mono_chrome ? 1 : 3;
flag(color_description_present_flag);
if (current->color_description_present_flag) {
fb(8, color_primaries);
fb(8, transfer_characteristics);
fb(8, matrix_coefficients);
} else {
infer(color_primaries, AVCOL_PRI_UNSPECIFIED);
infer(transfer_characteristics, AVCOL_TRC_UNSPECIFIED);
infer(matrix_coefficients, AVCOL_SPC_UNSPECIFIED);
}
if (current->mono_chrome) {
flag(color_range);
infer(subsampling_x, 1);
infer(subsampling_y, 1);
infer(chroma_sample_position, AV1_CSP_UNKNOWN);
infer(separate_uv_delta_q, 0);
} else if (current->color_primaries == AVCOL_PRI_BT709 &&
current->transfer_characteristics == AVCOL_TRC_IEC61966_2_1 &&
current->matrix_coefficients == AVCOL_SPC_RGB) {
infer(color_range, 1);
infer(subsampling_x, 0);
infer(subsampling_y, 0);
flag(separate_uv_delta_q);
} else {
flag(color_range);
if (seq_profile == FF_PROFILE_AV1_MAIN) {
infer(subsampling_x, 1);
infer(subsampling_y, 1);
} else if (seq_profile == FF_PROFILE_AV1_HIGH) {
infer(subsampling_x, 0);
infer(subsampling_y, 0);
} else {
if (priv->bit_depth == 12) {
fb(1, subsampling_x);
if (current->subsampling_x)
fb(1, subsampling_y);
else
infer(subsampling_y, 0);
} else {
infer(subsampling_x, 1);
infer(subsampling_y, 0);
}
}
if (current->subsampling_x && current->subsampling_y) {
fc(2, chroma_sample_position, AV1_CSP_UNKNOWN,
AV1_CSP_COLOCATED);
}
flag(separate_uv_delta_q);
}
return 0;
}
static int FUNC(timing_info)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawTimingInfo *current)
{
int err;
fc(32, num_units_in_display_tick, 1, MAX_UINT_BITS(32));
fc(32, time_scale, 1, MAX_UINT_BITS(32));
flag(equal_picture_interval);
if (current->equal_picture_interval)
uvlc(num_ticks_per_picture_minus_1, 0, MAX_UINT_BITS(32) - 1);
return 0;
}
static int FUNC(decoder_model_info)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawDecoderModelInfo *current)
{
int err;
fb(5, buffer_delay_length_minus_1);
fb(32, num_units_in_decoding_tick);
fb(5, buffer_removal_time_length_minus_1);
fb(5, frame_presentation_time_length_minus_1);
return 0;
}
static int FUNC(sequence_header_obu)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawSequenceHeader *current)
{
int i, err;
HEADER("Sequence Header");
fc(3, seq_profile, FF_PROFILE_AV1_MAIN,
FF_PROFILE_AV1_PROFESSIONAL);
flag(still_picture);
flag(reduced_still_picture_header);
if (current->reduced_still_picture_header) {
infer(timing_info_present_flag, 0);
infer(decoder_model_info_present_flag, 0);
infer(initial_display_delay_present_flag, 0);
infer(operating_points_cnt_minus_1, 0);
infer(operating_point_idc[0], 0);
fb(5, seq_level_idx[0]);
infer(seq_tier[0], 0);
infer(decoder_model_present_for_this_op[0], 0);
infer(initial_display_delay_present_for_this_op[0], 0);
} else {
flag(timing_info_present_flag);
if (current->timing_info_present_flag) {
CHECK(FUNC(timing_info)(ctx, rw, ¤t->timing_info));
flag(decoder_model_info_present_flag);
if (current->decoder_model_info_present_flag) {
CHECK(FUNC(decoder_model_info)
(ctx, rw, ¤t->decoder_model_info));
}
} else {
infer(decoder_model_info_present_flag, 0);
}
flag(initial_display_delay_present_flag);
fb(5, operating_points_cnt_minus_1);
for (i = 0; i <= current->operating_points_cnt_minus_1; i++) {
fbs(12, operating_point_idc[i], 1, i);
fbs(5, seq_level_idx[i], 1, i);
if (current->seq_level_idx[i] > 7)
flags(seq_tier[i], 1, i);
else
infer(seq_tier[i], 0);
if (current->decoder_model_info_present_flag) {
flags(decoder_model_present_for_this_op[i], 1, i);
if (current->decoder_model_present_for_this_op[i]) {
int n = current->decoder_model_info.buffer_delay_length_minus_1 + 1;
fbs(n, decoder_buffer_delay[i], 1, i);
fbs(n, encoder_buffer_delay[i], 1, i);
flags(low_delay_mode_flag[i], 1, i);
}
} else {
infer(decoder_model_present_for_this_op[i], 0);
}
if (current->initial_display_delay_present_flag) {
flags(initial_display_delay_present_for_this_op[i], 1, i);
if (current->initial_display_delay_present_for_this_op[i])
fbs(4, initial_display_delay_minus_1[i], 1, i);
}
}
}
fb(4, frame_width_bits_minus_1);
fb(4, frame_height_bits_minus_1);
fb(current->frame_width_bits_minus_1 + 1, max_frame_width_minus_1);
fb(current->frame_height_bits_minus_1 + 1, max_frame_height_minus_1);
if (current->reduced_still_picture_header)
infer(frame_id_numbers_present_flag, 0);
else
flag(frame_id_numbers_present_flag);
if (current->frame_id_numbers_present_flag) {
fb(4, delta_frame_id_length_minus_2);
fb(3, additional_frame_id_length_minus_1);
}
flag(use_128x128_superblock);
flag(enable_filter_intra);
flag(enable_intra_edge_filter);
if (current->reduced_still_picture_header) {
infer(enable_interintra_compound, 0);
infer(enable_masked_compound, 0);
infer(enable_warped_motion, 0);
infer(enable_dual_filter, 0);
infer(enable_order_hint, 0);
infer(enable_jnt_comp, 0);
infer(enable_ref_frame_mvs, 0);
infer(seq_force_screen_content_tools,
AV1_SELECT_SCREEN_CONTENT_TOOLS);
infer(seq_force_integer_mv,
AV1_SELECT_INTEGER_MV);
} else {
flag(enable_interintra_compound);
flag(enable_masked_compound);
flag(enable_warped_motion);
flag(enable_dual_filter);
flag(enable_order_hint);
if (current->enable_order_hint) {
flag(enable_jnt_comp);
flag(enable_ref_frame_mvs);
} else {
infer(enable_jnt_comp, 0);
infer(enable_ref_frame_mvs, 0);
}
flag(seq_choose_screen_content_tools);
if (current->seq_choose_screen_content_tools)
infer(seq_force_screen_content_tools,
AV1_SELECT_SCREEN_CONTENT_TOOLS);
else
fb(1, seq_force_screen_content_tools);
if (current->seq_force_screen_content_tools > 0) {
flag(seq_choose_integer_mv);
if (current->seq_choose_integer_mv)
infer(seq_force_integer_mv,
AV1_SELECT_INTEGER_MV);
else
fb(1, seq_force_integer_mv);
} else {
infer(seq_force_integer_mv, AV1_SELECT_INTEGER_MV);
}
if (current->enable_order_hint)
fb(3, order_hint_bits_minus_1);
}
flag(enable_superres);
flag(enable_cdef);
flag(enable_restoration);
CHECK(FUNC(color_config)(ctx, rw, ¤t->color_config,
current->seq_profile));
flag(film_grain_params_present);
return 0;
}
static int FUNC(temporal_delimiter_obu)(CodedBitstreamContext *ctx, RWContext *rw)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
HEADER("Temporal Delimiter");
priv->seen_frame_header = 0;
return 0;
}
static int FUNC(set_frame_refs)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
const AV1RawSequenceHeader *seq = priv->sequence_header;
static const uint8_t ref_frame_list[AV1_NUM_REF_FRAMES - 2] = {
AV1_REF_FRAME_LAST2, AV1_REF_FRAME_LAST3, AV1_REF_FRAME_BWDREF,
AV1_REF_FRAME_ALTREF2, AV1_REF_FRAME_ALTREF
};
int8_t ref_frame_idx[AV1_REFS_PER_FRAME], used_frame[AV1_NUM_REF_FRAMES];
int8_t shifted_order_hints[AV1_NUM_REF_FRAMES];
int cur_frame_hint, latest_order_hint, earliest_order_hint, ref;
int i, j;
for (i = 0; i < AV1_REFS_PER_FRAME; i++)
ref_frame_idx[i] = -1;
ref_frame_idx[AV1_REF_FRAME_LAST - AV1_REF_FRAME_LAST] = current->last_frame_idx;
ref_frame_idx[AV1_REF_FRAME_GOLDEN - AV1_REF_FRAME_LAST] = current->golden_frame_idx;
for (i = 0; i < AV1_NUM_REF_FRAMES; i++)
used_frame[i] = 0;
used_frame[current->last_frame_idx] = 1;
used_frame[current->golden_frame_idx] = 1;
cur_frame_hint = 1 << (seq->order_hint_bits_minus_1);
for (i = 0; i < AV1_NUM_REF_FRAMES; i++)
shifted_order_hints[i] = cur_frame_hint +
cbs_av1_get_relative_dist(seq, priv->ref[i].order_hint,
current->order_hint);
latest_order_hint = shifted_order_hints[current->last_frame_idx];
earliest_order_hint = shifted_order_hints[current->golden_frame_idx];
ref = -1;
for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
int hint = shifted_order_hints[i];
if (!used_frame[i] && hint >= cur_frame_hint &&
(ref < 0 || hint >= latest_order_hint)) {
ref = i;
latest_order_hint = hint;
}
}
if (ref >= 0) {
ref_frame_idx[AV1_REF_FRAME_ALTREF - AV1_REF_FRAME_LAST] = ref;
used_frame[ref] = 1;
}
ref = -1;
for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
int hint = shifted_order_hints[i];
if (!used_frame[i] && hint >= cur_frame_hint &&
(ref < 0 || hint < earliest_order_hint)) {
ref = i;
earliest_order_hint = hint;
}
}
if (ref >= 0) {
ref_frame_idx[AV1_REF_FRAME_BWDREF - AV1_REF_FRAME_LAST] = ref;
used_frame[ref] = 1;
}
ref = -1;
for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
int hint = shifted_order_hints[i];
if (!used_frame[i] && hint >= cur_frame_hint &&
(ref < 0 || hint < earliest_order_hint)) {
ref = i;
earliest_order_hint = hint;
}
}
if (ref >= 0) {
ref_frame_idx[AV1_REF_FRAME_ALTREF2 - AV1_REF_FRAME_LAST] = ref;
used_frame[ref] = 1;
}
for (i = 0; i < AV1_REFS_PER_FRAME - 2; i++) {
int ref_frame = ref_frame_list[i];
if (ref_frame_idx[ref_frame - AV1_REF_FRAME_LAST] < 0 ) {
ref = -1;
for (j = 0; j < AV1_NUM_REF_FRAMES; j++) {
int hint = shifted_order_hints[j];
if (!used_frame[j] && hint < cur_frame_hint &&
(ref < 0 || hint >= latest_order_hint)) {
ref = j;
latest_order_hint = hint;
}
}
if (ref >= 0) {
ref_frame_idx[ref_frame - AV1_REF_FRAME_LAST] = ref;
used_frame[ref] = 1;
}
}
}
ref = -1;
for (i = 0; i < AV1_NUM_REF_FRAMES; i++) {
int hint = shifted_order_hints[i];
if (ref < 0 || hint < earliest_order_hint) {
ref = i;
earliest_order_hint = hint;
}
}
for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
if (ref_frame_idx[i] < 0)
ref_frame_idx[i] = ref;
infer(ref_frame_idx[i], ref_frame_idx[i]);
}
return 0;
}
static int FUNC(superres_params)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
const AV1RawSequenceHeader *seq = priv->sequence_header;
int denom, err;
if (seq->enable_superres)
flag(use_superres);
else
infer(use_superres, 0);
if (current->use_superres) {
fb(3, coded_denom);
denom = current->coded_denom + AV1_SUPERRES_DENOM_MIN;
} else {
denom = AV1_SUPERRES_NUM;
}
priv->upscaled_width = priv->frame_width;
priv->frame_width = (priv->upscaled_width * AV1_SUPERRES_NUM +
denom / 2) / denom;
return 0;
}
static int FUNC(frame_size)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
const AV1RawSequenceHeader *seq = priv->sequence_header;
int err;
if (current->frame_size_override_flag) {
fb(seq->frame_width_bits_minus_1 + 1, frame_width_minus_1);
fb(seq->frame_height_bits_minus_1 + 1, frame_height_minus_1);
priv->frame_width = current->frame_width_minus_1 + 1;
priv->frame_height = current->frame_height_minus_1 + 1;
} else {
priv->frame_width = seq->max_frame_width_minus_1 + 1;
priv->frame_height = seq->max_frame_height_minus_1 + 1;
}
CHECK(FUNC(superres_params)(ctx, rw, current));
return 0;
}
static int FUNC(render_size)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
int err;
flag(render_and_frame_size_different);
if (current->render_and_frame_size_different) {
fb(16, render_width_minus_1);
fb(16, render_height_minus_1);
priv->render_width = current->render_width_minus_1 + 1;
priv->render_height = current->render_height_minus_1 + 1;
} else {
priv->render_width = priv->upscaled_width;
priv->render_height = priv->frame_height;
}
return 0;
}
static int FUNC(frame_size_with_refs)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
int i, err;
for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
flags(found_ref[i], 1, i);
if (current->found_ref[i]) {
AV1ReferenceFrameState *ref =
&priv->ref[current->ref_frame_idx[i]];
if (!ref->valid) {
av_log(ctx->log_ctx, AV_LOG_ERROR,
"Missing reference frame needed for frame size "
"(ref = %d, ref_frame_idx = %d).\n",
i, current->ref_frame_idx[i]);
return AVERROR_INVALIDDATA;
}
priv->upscaled_width = ref->upscaled_width;
priv->frame_width = ref->frame_width;
priv->frame_height = ref->frame_height;
priv->render_width = ref->render_width;
priv->render_height = ref->render_height;
break;
}
}
if (i >= AV1_REFS_PER_FRAME) {
CHECK(FUNC(frame_size)(ctx, rw, current));
CHECK(FUNC(render_size)(ctx, rw, current));
} else {
CHECK(FUNC(superres_params)(ctx, rw, current));
}
return 0;
}
static int FUNC(interpolation_filter)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
int err;
flag(is_filter_switchable);
if (current->is_filter_switchable)
infer(interpolation_filter,
AV1_INTERPOLATION_FILTER_SWITCHABLE);
else
fb(2, interpolation_filter);
return 0;
}
static int FUNC(tile_info)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
const AV1RawSequenceHeader *seq = priv->sequence_header;
int mi_cols, mi_rows, sb_cols, sb_rows, sb_shift, sb_size;
int max_tile_width_sb, max_tile_height_sb, max_tile_area_sb;
int min_log2_tile_cols, max_log2_tile_cols, max_log2_tile_rows;
int min_log2_tiles, min_log2_tile_rows;
int i, err;
mi_cols = 2 * ((priv->frame_width + 7) >> 3);
mi_rows = 2 * ((priv->frame_height + 7) >> 3);
sb_cols = seq->use_128x128_superblock ? ((mi_cols + 31) >> 5)
: ((mi_cols + 15) >> 4);
sb_rows = seq->use_128x128_superblock ? ((mi_rows + 31) >> 5)
: ((mi_rows + 15) >> 4);
sb_shift = seq->use_128x128_superblock ? 5 : 4;
sb_size = sb_shift + 2;
max_tile_width_sb = AV1_MAX_TILE_WIDTH >> sb_size;
max_tile_area_sb = AV1_MAX_TILE_AREA >> (2 * sb_size);
min_log2_tile_cols = cbs_av1_tile_log2(max_tile_width_sb, sb_cols);
max_log2_tile_cols = cbs_av1_tile_log2(1, FFMIN(sb_cols, AV1_MAX_TILE_COLS));
max_log2_tile_rows = cbs_av1_tile_log2(1, FFMIN(sb_rows, AV1_MAX_TILE_ROWS));
min_log2_tiles = FFMAX(min_log2_tile_cols,
cbs_av1_tile_log2(max_tile_area_sb, sb_rows * sb_cols));
flag(uniform_tile_spacing_flag);
if (current->uniform_tile_spacing_flag) {
int tile_width_sb, tile_height_sb;
increment(tile_cols_log2, min_log2_tile_cols, max_log2_tile_cols);
tile_width_sb = (sb_cols + (1 << current->tile_cols_log2) - 1) >>
current->tile_cols_log2;
current->tile_cols = (sb_cols + tile_width_sb - 1) / tile_width_sb;
min_log2_tile_rows = FFMAX(min_log2_tiles - current->tile_cols_log2, 0);
increment(tile_rows_log2, min_log2_tile_rows, max_log2_tile_rows);
tile_height_sb = (sb_rows + (1 << current->tile_rows_log2) - 1) >>
current->tile_rows_log2;
current->tile_rows = (sb_rows + tile_height_sb - 1) / tile_height_sb;
} else {
int widest_tile_sb, start_sb, size_sb, max_width, max_height;
widest_tile_sb = 0;
start_sb = 0;
for (i = 0; start_sb < sb_cols && i < AV1_MAX_TILE_COLS; i++) {
max_width = FFMIN(sb_cols - start_sb, max_tile_width_sb);
ns(max_width, width_in_sbs_minus_1[i], 1, i);
size_sb = current->width_in_sbs_minus_1[i] + 1;
widest_tile_sb = FFMAX(size_sb, widest_tile_sb);
start_sb += size_sb;
}
current->tile_cols_log2 = cbs_av1_tile_log2(1, i);
current->tile_cols = i;
if (min_log2_tiles > 0)
max_tile_area_sb = (sb_rows * sb_cols) >> (min_log2_tiles + 1);
else
max_tile_area_sb = sb_rows * sb_cols;
max_tile_height_sb = FFMAX(max_tile_area_sb / widest_tile_sb, 1);
start_sb = 0;
for (i = 0; start_sb < sb_rows && i < AV1_MAX_TILE_ROWS; i++) {
max_height = FFMIN(sb_rows - start_sb, max_tile_height_sb);
ns(max_height, height_in_sbs_minus_1[i], 1, i);
size_sb = current->height_in_sbs_minus_1[i] + 1;
start_sb += size_sb;
}
current->tile_rows_log2 = cbs_av1_tile_log2(1, i);
current->tile_rows = i;
}
if (current->tile_cols_log2 > 0 ||
current->tile_rows_log2 > 0) {
fb(current->tile_cols_log2 + current->tile_rows_log2,
context_update_tile_id);
fb(2, tile_size_bytes_minus1);
} else {
infer(context_update_tile_id, 0);
}
priv->tile_cols = current->tile_cols;
priv->tile_rows = current->tile_rows;
return 0;
}
static int FUNC(quantization_params)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
const AV1RawSequenceHeader *seq = priv->sequence_header;
int err;
fb(8, base_q_idx);
delta_q(delta_q_y_dc);
if (priv->num_planes > 1) {
if (seq->color_config.separate_uv_delta_q)
flag(diff_uv_delta);
else
infer(diff_uv_delta, 0);
delta_q(delta_q_u_dc);
delta_q(delta_q_u_ac);
if (current->diff_uv_delta) {
delta_q(delta_q_v_dc);
delta_q(delta_q_v_ac);
} else {
infer(delta_q_v_dc, current->delta_q_u_dc);
infer(delta_q_v_ac, current->delta_q_u_ac);
}
} else {
infer(delta_q_u_dc, 0);
infer(delta_q_u_ac, 0);
infer(delta_q_v_dc, 0);
infer(delta_q_v_ac, 0);
}
flag(using_qmatrix);
if (current->using_qmatrix) {
fb(4, qm_y);
fb(4, qm_u);
if (seq->color_config.separate_uv_delta_q)
fb(4, qm_v);
else
infer(qm_v, current->qm_u);
}
return 0;
}
static int FUNC(segmentation_params)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
static const uint8_t bits[AV1_SEG_LVL_MAX] = { 8, 6, 6, 6, 6, 3, 0, 0 };
static const uint8_t sign[AV1_SEG_LVL_MAX] = { 1, 1, 1, 1, 1, 0, 0, 0 };
int i, j, err;
flag(segmentation_enabled);
if (current->segmentation_enabled) {
if (current->primary_ref_frame == AV1_PRIMARY_REF_NONE) {
infer(segmentation_update_map, 1);
infer(segmentation_temporal_update, 0);
infer(segmentation_update_data, 1);
} else {
flag(segmentation_update_map);
if (current->segmentation_update_map)
flag(segmentation_temporal_update);
else
infer(segmentation_temporal_update, 0);
flag(segmentation_update_data);
}
if (current->segmentation_update_data) {
for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
flags(feature_enabled[i][j], 2, i, j);
if (current->feature_enabled[i][j] && bits[j] > 0) {
if (sign[j])
sus(1 + bits[j], feature_value[i][j], 2, i, j);
else
fbs(bits[j], feature_value[i][j], 2, i, j);
} else {
infer(feature_value[i][j], 0);
}
}
}
}
} else {
for (i = 0; i < AV1_MAX_SEGMENTS; i++) {
for (j = 0; j < AV1_SEG_LVL_MAX; j++) {
infer(feature_enabled[i][j], 0);
infer(feature_value[i][j], 0);
}
}
}
return 0;
}
static int FUNC(delta_q_params)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
int err;
if (current->base_q_idx > 0)
flag(delta_q_present);
else
infer(delta_q_present, 0);
if (current->delta_q_present)
fb(2, delta_q_res);
return 0;
}
static int FUNC(delta_lf_params)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
int err;
if (current->delta_q_present) {
if (!current->allow_intrabc)
flag(delta_lf_present);
else
infer(delta_lf_present, 0);
if (current->delta_lf_present) {
fb(2, delta_lf_res);
flag(delta_lf_multi);
} else {
infer(delta_lf_res, 0);
infer(delta_lf_multi, 0);
}
} else {
infer(delta_lf_present, 0);
infer(delta_lf_res, 0);
infer(delta_lf_multi, 0);
}
return 0;
}
static int FUNC(loop_filter_params)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
int i, err;
if (priv->coded_lossless || current->allow_intrabc) {
infer(loop_filter_level[0], 0);
infer(loop_filter_level[1], 0);
infer(loop_filter_ref_deltas[AV1_REF_FRAME_INTRA], 1);
infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST], 0);
infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST2], 0);
infer(loop_filter_ref_deltas[AV1_REF_FRAME_LAST3], 0);
infer(loop_filter_ref_deltas[AV1_REF_FRAME_BWDREF], 0);
infer(loop_filter_ref_deltas[AV1_REF_FRAME_GOLDEN], -1);
infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF], -1);
infer(loop_filter_ref_deltas[AV1_REF_FRAME_ALTREF2], -1);
for (i = 0; i < 2; i++)
infer(loop_filter_mode_deltas[i], 0);
return 0;
}
fb(6, loop_filter_level[0]);
fb(6, loop_filter_level[1]);
if (priv->num_planes > 1) {
if (current->loop_filter_level[0] ||
current->loop_filter_level[1]) {
fb(6, loop_filter_level[2]);
fb(6, loop_filter_level[3]);
}
}
fb(3, loop_filter_sharpness);
flag(loop_filter_delta_enabled);
if (current->loop_filter_delta_enabled) {
flag(loop_filter_delta_update);
if (current->loop_filter_delta_update) {
for (i = 0; i < AV1_TOTAL_REFS_PER_FRAME; i++) {
flags(update_ref_delta[i], 1, i);
if (current->update_ref_delta[i])
sus(1 + 6, loop_filter_ref_deltas[i], 1, i);
}
for (i = 0; i < 2; i++) {
flags(update_mode_delta[i], 1, i);
if (current->update_mode_delta[i])
sus(1 + 6, loop_filter_mode_deltas[i], 1, i);
}
}
}
return 0;
}
static int FUNC(cdef_params)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
const AV1RawSequenceHeader *seq = priv->sequence_header;
int i, err;
if (priv->coded_lossless || current->allow_intrabc ||
!seq->enable_cdef) {
infer(cdef_damping_minus_3, 0);
infer(cdef_bits, 0);
infer(cdef_y_pri_strength[0], 0);
infer(cdef_y_sec_strength[0], 0);
infer(cdef_uv_pri_strength[0], 0);
infer(cdef_uv_sec_strength[0], 0);
return 0;
}
fb(2, cdef_damping_minus_3);
fb(2, cdef_bits);
for (i = 0; i < (1 << current->cdef_bits); i++) {
fbs(4, cdef_y_pri_strength[i], 1, i);
fbs(2, cdef_y_sec_strength[i], 1, i);
if (priv->num_planes > 1) {
fbs(4, cdef_uv_pri_strength[i], 1, i);
fbs(2, cdef_uv_sec_strength[i], 1, i);
}
}
return 0;
}
static int FUNC(lr_params)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
const AV1RawSequenceHeader *seq = priv->sequence_header;
int uses_lr, uses_chroma_lr;
int i, err;
if (priv->all_lossless || current->allow_intrabc ||
!seq->enable_restoration) {
return 0;
}
uses_lr = uses_chroma_lr = 0;
for (i = 0; i < priv->num_planes; i++) {
fbs(2, lr_type[i], 1, i);
if (current->lr_type[i] != 0) {
uses_lr = 1;
if (i > 0)
uses_chroma_lr = 1;
}
}
if (uses_lr) {
if (seq->use_128x128_superblock)
increment(lr_unit_shift, 1, 2);
else
increment(lr_unit_shift, 0, 2);
if(seq->color_config.subsampling_x &&
seq->color_config.subsampling_y && uses_chroma_lr) {
fb(1, lr_uv_shift);
} else {
infer(lr_uv_shift, 0);
}
}
return 0;
}
static int FUNC(read_tx_mode)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
int err;
if (priv->coded_lossless)
infer(tx_mode, 0);
else
increment(tx_mode, 1, 2);
return 0;
}
static int FUNC(frame_reference_mode)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
int err;
if (current->frame_type == AV1_FRAME_INTRA_ONLY ||
current->frame_type == AV1_FRAME_KEY)
infer(reference_select, 0);
else
flag(reference_select);
return 0;
}
static int FUNC(skip_mode_params)(CodedBitstreamContext *ctx, RWContext *rw,
AV1RawFrameHeader *current)
{
CodedBitstreamAV1Context *priv = ctx->priv_data;
const AV1RawSequenceHeader *seq = priv->sequence_header;
int skip_mode_allowed;
int err;
if (current->frame_type == AV1_FRAME_KEY ||
current->frame_type == AV1_FRAME_INTRA_ONLY ||
!current->reference_select || !seq->enable_order_hint) {
skip_mode_allowed = 0;
} else {
int forward_idx, backward_idx;
int forward_hint, backward_hint;
int ref_hint, dist, i;
forward_idx = -1;
backward_idx = -1;
for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
ref_hint = priv->ref[current->ref_frame_idx[i]].order_hint;
dist = cbs_av1_get_relative_dist(seq, ref_hint,
current->order_hint);
if (dist < 0) {
if (forward_idx < 0 ||
cbs_av1_get_relative_dist(seq, ref_hint,
forward_hint) > 0) {