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FFmpeg/libavcodec/cbs_h264_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(rbsp_trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw)
{
int err;
fixed(1, rbsp_stop_one_bit, 1);
while (byte_alignment(rw) != 0)
fixed(1, rbsp_alignment_zero_bit, 0);
return 0;
}
static int FUNC(nal_unit_header)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawNALUnitHeader *current,
uint32_t valid_type_mask)
{
int err;
fixed(1, forbidden_zero_bit, 0);
ub(2, nal_ref_idc);
ub(5, nal_unit_type);
if (!(1 << current->nal_unit_type & valid_type_mask)) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid NAL unit type %d.\n",
current->nal_unit_type);
return AVERROR_INVALIDDATA;
}
if (current->nal_unit_type == 14 ||
current->nal_unit_type == 20 ||
current->nal_unit_type == 21) {
if (current->nal_unit_type != 21)
flag(svc_extension_flag);
else
flag(avc_3d_extension_flag);
if (current->svc_extension_flag) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "SVC not supported.\n");
return AVERROR_PATCHWELCOME;
} else if (current->avc_3d_extension_flag) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "3DAVC not supported.\n");
return AVERROR_PATCHWELCOME;
} else {
av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC not supported.\n");
return AVERROR_PATCHWELCOME;
}
}
return 0;
}
static int FUNC(scaling_list)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawScalingList *current,
int size_of_scaling_list)
{
int err, i, scale;
scale = 8;
for (i = 0; i < size_of_scaling_list; i++) {
ses(delta_scale[i], -128, +127, 1, i);
scale = (scale + current->delta_scale[i] + 256) % 256;
if (scale == 0)
break;
}
return 0;
}
static int FUNC(hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawHRD *current)
{
int err, i;
ue(cpb_cnt_minus1, 0, 31);
ub(4, bit_rate_scale);
ub(4, cpb_size_scale);
for (i = 0; i <= current->cpb_cnt_minus1; i++) {
ues(bit_rate_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
ues(cpb_size_value_minus1[i], 0, UINT32_MAX - 1, 1, i);
flags(cbr_flag[i], 1, i);
}
ub(5, initial_cpb_removal_delay_length_minus1);
ub(5, cpb_removal_delay_length_minus1);
ub(5, dpb_output_delay_length_minus1);
ub(5, time_offset_length);
return 0;
}
static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawVUI *current, H264RawSPS *sps)
{
int err;
flag(aspect_ratio_info_present_flag);
if (current->aspect_ratio_info_present_flag) {
ub(8, aspect_ratio_idc);
if (current->aspect_ratio_idc == 255) {
ub(16, sar_width);
ub(16, sar_height);
}
} 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) {
ub(3, video_format);
flag(video_full_range_flag);
flag(colour_description_present_flag);
if (current->colour_description_present_flag) {
ub(8, colour_primaries);
ub(8, transfer_characteristics);
ub(8, matrix_coefficients);
} 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(timing_info_present_flag);
if (current->timing_info_present_flag) {
u(32, num_units_in_tick, 1, UINT32_MAX);
u(32, time_scale, 1, UINT32_MAX);
flag(fixed_frame_rate_flag);
} else {
infer(fixed_frame_rate_flag, 0);
}
flag(nal_hrd_parameters_present_flag);
if (current->nal_hrd_parameters_present_flag)
CHECK(FUNC(hrd_parameters)(ctx, rw, &current->nal_hrd_parameters));
flag(vcl_hrd_parameters_present_flag);
if (current->vcl_hrd_parameters_present_flag)
CHECK(FUNC(hrd_parameters)(ctx, rw, &current->vcl_hrd_parameters));
if (current->nal_hrd_parameters_present_flag ||
current->vcl_hrd_parameters_present_flag)
flag(low_delay_hrd_flag);
else
infer(low_delay_hrd_flag, 1 - current->fixed_frame_rate_flag);
flag(pic_struct_present_flag);
flag(bitstream_restriction_flag);
if (current->bitstream_restriction_flag) {
flag(motion_vectors_over_pic_boundaries_flag);
ue(max_bytes_per_pic_denom, 0, 16);
ue(max_bits_per_mb_denom, 0, 16);
// The current version of the standard constrains this to be in
// [0,15], but older versions allow 16.
ue(log2_max_mv_length_horizontal, 0, 16);
ue(log2_max_mv_length_vertical, 0, 16);
ue(max_num_reorder_frames, 0, H264_MAX_DPB_FRAMES);
ue(max_dec_frame_buffering, 0, H264_MAX_DPB_FRAMES);
} else {
infer(motion_vectors_over_pic_boundaries_flag, 1);
infer(max_bytes_per_pic_denom, 2);
infer(max_bits_per_mb_denom, 1);
infer(log2_max_mv_length_horizontal, 15);
infer(log2_max_mv_length_vertical, 15);
if ((sps->profile_idc == 44 || sps->profile_idc == 86 ||
sps->profile_idc == 100 || sps->profile_idc == 110 ||
sps->profile_idc == 122 || sps->profile_idc == 244) &&
sps->constraint_set3_flag) {
infer(max_num_reorder_frames, 0);
infer(max_dec_frame_buffering, 0);
} else {
infer(max_num_reorder_frames, H264_MAX_DPB_FRAMES);
infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES);
}
}
return 0;
}
static int FUNC(vui_parameters_default)(CodedBitstreamContext *ctx,
RWContext *rw, H264RawVUI *current,
H264RawSPS *sps)
{
infer(aspect_ratio_idc, 0);
infer(video_format, 5);
infer(video_full_range_flag, 0);
infer(colour_primaries, 2);
infer(transfer_characteristics, 2);
infer(matrix_coefficients, 2);
infer(chroma_sample_loc_type_top_field, 0);
infer(chroma_sample_loc_type_bottom_field, 0);
infer(fixed_frame_rate_flag, 0);
infer(low_delay_hrd_flag, 1);
infer(pic_struct_present_flag, 0);
infer(motion_vectors_over_pic_boundaries_flag, 1);
infer(max_bytes_per_pic_denom, 2);
infer(max_bits_per_mb_denom, 1);
infer(log2_max_mv_length_horizontal, 15);
infer(log2_max_mv_length_vertical, 15);
if ((sps->profile_idc == 44 || sps->profile_idc == 86 ||
sps->profile_idc == 100 || sps->profile_idc == 110 ||
sps->profile_idc == 122 || sps->profile_idc == 244) &&
sps->constraint_set3_flag) {
infer(max_num_reorder_frames, 0);
infer(max_dec_frame_buffering, 0);
} else {
infer(max_num_reorder_frames, H264_MAX_DPB_FRAMES);
infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES);
}
return 0;
}
static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSPS *current)
{
int err, i;
HEADER("Sequence Parameter Set");
CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
1 << H264_NAL_SPS));
ub(8, profile_idc);
flag(constraint_set0_flag);
flag(constraint_set1_flag);
flag(constraint_set2_flag);
flag(constraint_set3_flag);
flag(constraint_set4_flag);
flag(constraint_set5_flag);
u(2, reserved_zero_2bits, 0, 0);
ub(8, level_idc);
ue(seq_parameter_set_id, 0, 31);
if (current->profile_idc == 100 || current->profile_idc == 110 ||
current->profile_idc == 122 || current->profile_idc == 244 ||
current->profile_idc == 44 || current->profile_idc == 83 ||
current->profile_idc == 86 || current->profile_idc == 118 ||
current->profile_idc == 128 || current->profile_idc == 138) {
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(bit_depth_luma_minus8, 0, 6);
ue(bit_depth_chroma_minus8, 0, 6);
flag(qpprime_y_zero_transform_bypass_flag);
flag(seq_scaling_matrix_present_flag);
if (current->seq_scaling_matrix_present_flag) {
for (i = 0; i < ((current->chroma_format_idc != 3) ? 8 : 12); i++) {
flags(seq_scaling_list_present_flag[i], 1, i);
if (current->seq_scaling_list_present_flag[i]) {
if (i < 6)
CHECK(FUNC(scaling_list)(ctx, rw,
&current->scaling_list_4x4[i],
16));
else
CHECK(FUNC(scaling_list)(ctx, rw,
&current->scaling_list_8x8[i - 6],
64));
}
}
}
} else {
infer(chroma_format_idc, current->profile_idc == 183 ? 0 : 1);
infer(separate_colour_plane_flag, 0);
infer(bit_depth_luma_minus8, 0);
infer(bit_depth_chroma_minus8, 0);
}
ue(log2_max_frame_num_minus4, 0, 12);
ue(pic_order_cnt_type, 0, 2);
if (current->pic_order_cnt_type == 0) {
ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12);
} else if (current->pic_order_cnt_type == 1) {
flag(delta_pic_order_always_zero_flag);
se(offset_for_non_ref_pic, INT32_MIN + 1, INT32_MAX);
se(offset_for_top_to_bottom_field, INT32_MIN + 1, INT32_MAX);
ue(num_ref_frames_in_pic_order_cnt_cycle, 0, 255);
for (i = 0; i < current->num_ref_frames_in_pic_order_cnt_cycle; i++)
ses(offset_for_ref_frame[i], INT32_MIN + 1, INT32_MAX, 1, i);
}
ue(max_num_ref_frames, 0, H264_MAX_DPB_FRAMES);
flag(gaps_in_frame_num_allowed_flag);
ue(pic_width_in_mbs_minus1, 0, H264_MAX_MB_WIDTH);
ue(pic_height_in_map_units_minus1, 0, H264_MAX_MB_HEIGHT);
flag(frame_mbs_only_flag);
if (!current->frame_mbs_only_flag)
flag(mb_adaptive_frame_field_flag);
flag(direct_8x8_inference_flag);
flag(frame_cropping_flag);
if (current->frame_cropping_flag) {
ue(frame_crop_left_offset, 0, H264_MAX_WIDTH);
ue(frame_crop_right_offset, 0, H264_MAX_WIDTH);
ue(frame_crop_top_offset, 0, H264_MAX_HEIGHT);
ue(frame_crop_bottom_offset, 0, H264_MAX_HEIGHT);
}
flag(vui_parameters_present_flag);
if (current->vui_parameters_present_flag)
CHECK(FUNC(vui_parameters)(ctx, rw, &current->vui, current));
else
CHECK(FUNC(vui_parameters_default)(ctx, rw, &current->vui, current));
CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
return 0;
}
static int FUNC(sps_extension)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSPSExtension *current)
{
int err;
HEADER("Sequence Parameter Set Extension");
CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
1 << H264_NAL_SPS_EXT));
ue(seq_parameter_set_id, 0, 31);
ue(aux_format_idc, 0, 3);
if (current->aux_format_idc != 0) {
int bits;
ue(bit_depth_aux_minus8, 0, 4);
flag(alpha_incr_flag);
bits = current->bit_depth_aux_minus8 + 9;
ub(bits, alpha_opaque_value);
ub(bits, alpha_transparent_value);
}
flag(additional_extension_flag);
CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
return 0;
}
static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawPPS *current)
{
CodedBitstreamH264Context *h264 = ctx->priv_data;
const H264RawSPS *sps;
int err, i;
HEADER("Picture Parameter Set");
CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
1 << H264_NAL_PPS));
ue(pic_parameter_set_id, 0, 255);
ue(seq_parameter_set_id, 0, 31);
sps = h264->sps[current->seq_parameter_set_id];
if (!sps) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
current->seq_parameter_set_id);
return AVERROR_INVALIDDATA;
}
flag(entropy_coding_mode_flag);
flag(bottom_field_pic_order_in_frame_present_flag);
ue(num_slice_groups_minus1, 0, 7);
if (current->num_slice_groups_minus1 > 0) {
unsigned int pic_size;
int iGroup;
pic_size = (sps->pic_width_in_mbs_minus1 + 1) *
(sps->pic_height_in_map_units_minus1 + 1);
ue(slice_group_map_type, 0, 6);
if (current->slice_group_map_type == 0) {
for (iGroup = 0; iGroup <= current->num_slice_groups_minus1; iGroup++)
ues(run_length_minus1[iGroup], 0, pic_size - 1, 1, iGroup);
} else if (current->slice_group_map_type == 2) {
for (iGroup = 0; iGroup < current->num_slice_groups_minus1; iGroup++) {
ues(top_left[iGroup], 0, pic_size - 1, 1, iGroup);
ues(bottom_right[iGroup],
current->top_left[iGroup], pic_size - 1, 1, iGroup);
}
} else if (current->slice_group_map_type == 3 ||
current->slice_group_map_type == 4 ||
current->slice_group_map_type == 5) {
flag(slice_group_change_direction_flag);
ue(slice_group_change_rate_minus1, 0, pic_size - 1);
} else if (current->slice_group_map_type == 6) {
ue(pic_size_in_map_units_minus1, pic_size - 1, pic_size - 1);
allocate(current->slice_group_id,
current->pic_size_in_map_units_minus1 + 1);
for (i = 0; i <= current->pic_size_in_map_units_minus1; i++)
us(av_log2(2 * current->num_slice_groups_minus1 + 1),
slice_group_id[i], 0, current->num_slice_groups_minus1, 1, i);
}
}
ue(num_ref_idx_l0_default_active_minus1, 0, 31);
ue(num_ref_idx_l1_default_active_minus1, 0, 31);
flag(weighted_pred_flag);
u(2, weighted_bipred_idc, 0, 2);
se(pic_init_qp_minus26, -26 - 6 * sps->bit_depth_luma_minus8, +25);
se(pic_init_qs_minus26, -26, +25);
se(chroma_qp_index_offset, -12, +12);
flag(deblocking_filter_control_present_flag);
flag(constrained_intra_pred_flag);
flag(redundant_pic_cnt_present_flag);
if (more_rbsp_data(current->more_rbsp_data))
{
flag(transform_8x8_mode_flag);
flag(pic_scaling_matrix_present_flag);
if (current->pic_scaling_matrix_present_flag) {
for (i = 0; i < 6 + (((sps->chroma_format_idc != 3) ? 2 : 6) *
current->transform_8x8_mode_flag); i++) {
flags(pic_scaling_list_present_flag[i], 1, i);
if (current->pic_scaling_list_present_flag[i]) {
if (i < 6)
CHECK(FUNC(scaling_list)(ctx, rw,
&current->scaling_list_4x4[i],
16));
else
CHECK(FUNC(scaling_list)(ctx, rw,
&current->scaling_list_8x8[i - 6],
64));
}
}
}
se(second_chroma_qp_index_offset, -12, +12);
} else {
infer(transform_8x8_mode_flag, 0);
infer(pic_scaling_matrix_present_flag, 0);
infer(second_chroma_qp_index_offset, current->chroma_qp_index_offset);
}
CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
return 0;
}
static int FUNC(sei_buffering_period)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSEIBufferingPeriod *current,
SEIMessageState *sei)
{
CodedBitstreamH264Context *h264 = ctx->priv_data;
const H264RawSPS *sps;
int err, i, length;
HEADER("Buffering Period");
ue(seq_parameter_set_id, 0, 31);
sps = h264->sps[current->seq_parameter_set_id];
if (!sps) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
current->seq_parameter_set_id);
return AVERROR_INVALIDDATA;
}
h264->active_sps = sps;
if (sps->vui.nal_hrd_parameters_present_flag) {
for (i = 0; i <= sps->vui.nal_hrd_parameters.cpb_cnt_minus1; i++) {
length = sps->vui.nal_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
xu(length, initial_cpb_removal_delay[SchedSelIdx],
current->nal.initial_cpb_removal_delay[i],
1, MAX_UINT_BITS(length), 1, i);
xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
current->nal.initial_cpb_removal_delay_offset[i],
0, MAX_UINT_BITS(length), 1, i);
}
}
if (sps->vui.vcl_hrd_parameters_present_flag) {
for (i = 0; i <= sps->vui.vcl_hrd_parameters.cpb_cnt_minus1; i++) {
length = sps->vui.vcl_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
xu(length, initial_cpb_removal_delay[SchedSelIdx],
current->vcl.initial_cpb_removal_delay[i],
1, MAX_UINT_BITS(length), 1, i);
xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
current->vcl.initial_cpb_removal_delay_offset[i],
0, MAX_UINT_BITS(length), 1, i);
}
}
return 0;
}
static int FUNC(sei_pic_timestamp)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSEIPicTimestamp *current,
const H264RawSPS *sps)
{
uint8_t time_offset_length;
int err;
u(2, ct_type, 0, 2);
flag(nuit_field_based_flag);
u(5, counting_type, 0, 6);
flag(full_timestamp_flag);
flag(discontinuity_flag);
flag(cnt_dropped_flag);
ub(8, n_frames);
if (current->full_timestamp_flag) {
u(6, seconds_value, 0, 59);
u(6, minutes_value, 0, 59);
u(5, hours_value, 0, 23);
} else {
flag(seconds_flag);
if (current->seconds_flag) {
u(6, seconds_value, 0, 59);
flag(minutes_flag);
if (current->minutes_flag) {
u(6, minutes_value, 0, 59);
flag(hours_flag);
if (current->hours_flag)
u(5, hours_value, 0, 23);
}
}
}
if (sps->vui.nal_hrd_parameters_present_flag)
time_offset_length = sps->vui.nal_hrd_parameters.time_offset_length;
else if (sps->vui.vcl_hrd_parameters_present_flag)
time_offset_length = sps->vui.vcl_hrd_parameters.time_offset_length;
else
time_offset_length = 24;
if (time_offset_length > 0)
ib(time_offset_length, time_offset);
else
infer(time_offset, 0);
return 0;
}
static int FUNC(sei_pic_timing)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSEIPicTiming *current,
SEIMessageState *sei)
{
CodedBitstreamH264Context *h264 = ctx->priv_data;
const H264RawSPS *sps;
int err;
HEADER("Picture Timing");
sps = h264->active_sps;
if (!sps) {
// If there is exactly one possible SPS but it is not yet active
// then just assume that it should be the active one.
int i, k = -1;
for (i = 0; i < H264_MAX_SPS_COUNT; i++) {
if (h264->sps[i]) {
if (k >= 0) {
k = -1;
break;
}
k = i;
}
}
if (k >= 0)
sps = h264->sps[k];
}
if (!sps) {
av_log(ctx->log_ctx, AV_LOG_ERROR,
"No active SPS for pic_timing.\n");
return AVERROR_INVALIDDATA;
}
if (sps->vui.nal_hrd_parameters_present_flag ||
sps->vui.vcl_hrd_parameters_present_flag) {
const H264RawHRD *hrd;
if (sps->vui.nal_hrd_parameters_present_flag)
hrd = &sps->vui.nal_hrd_parameters;
else if (sps->vui.vcl_hrd_parameters_present_flag)
hrd = &sps->vui.vcl_hrd_parameters;
else {
av_log(ctx->log_ctx, AV_LOG_ERROR,
"No HRD parameters for pic_timing.\n");
return AVERROR_INVALIDDATA;
}
ub(hrd->cpb_removal_delay_length_minus1 + 1, cpb_removal_delay);
ub(hrd->dpb_output_delay_length_minus1 + 1, dpb_output_delay);
}
if (sps->vui.pic_struct_present_flag) {
static const uint8_t num_clock_ts[9] = {
1, 1, 1, 2, 2, 3, 3, 2, 3
};
int i;
u(4, pic_struct, 0, 8);
if (current->pic_struct > 8)
return AVERROR_INVALIDDATA;
for (i = 0; i < num_clock_ts[current->pic_struct]; i++) {
flags(clock_timestamp_flag[i], 1, i);
if (current->clock_timestamp_flag[i])
CHECK(FUNC(sei_pic_timestamp)(ctx, rw,
&current->timestamp[i], sps));
}
}
return 0;
}
static int FUNC(sei_pan_scan_rect)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSEIPanScanRect *current,
SEIMessageState *sei)
{
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);
}
ue(pan_scan_rect_repetition_period, 0, 16384);
}
return 0;
}
static int FUNC(sei_recovery_point)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSEIRecoveryPoint *current,
SEIMessageState *sei)
{
int err;
HEADER("Recovery Point");
ue(recovery_frame_cnt, 0, 65535);
flag(exact_match_flag);
flag(broken_link_flag);
u(2, changing_slice_group_idc, 0, 2);
return 0;
}
static int FUNC(sei_display_orientation)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSEIDisplayOrientation *current,
SEIMessageState *sei)
{
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);
ue(display_orientation_repetition_period, 0, 16384);
flag(display_orientation_extension_flag);
}
return 0;
}
static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSEI *current)
{
int err;
HEADER("Supplemental Enhancement Information");
CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
1 << H264_NAL_SEI));
CHECK(FUNC_SEI(message_list)(ctx, rw, &current->message_list, 1));
CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
return 0;
}
static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawAUD *current)
{
int err;
HEADER("Access Unit Delimiter");
CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
1 << H264_NAL_AUD));
ub(3, primary_pic_type);
CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
return 0;
}
static int FUNC(ref_pic_list_modification)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSliceHeader *current)
{
CodedBitstreamH264Context *h264 = ctx->priv_data;
const H264RawSPS *sps = h264->active_sps;
int err, i, mopn;
if (current->slice_type % 5 != 2 &&
current->slice_type % 5 != 4) {
flag(ref_pic_list_modification_flag_l0);
if (current->ref_pic_list_modification_flag_l0) {
for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
xue(modification_of_pic_nums_idc,
current->rplm_l0[i].modification_of_pic_nums_idc, 0, 3, 0);
mopn = current->rplm_l0[i].modification_of_pic_nums_idc;
if (mopn == 3)
break;
if (mopn == 0 || mopn == 1)
xue(abs_diff_pic_num_minus1,
current->rplm_l0[i].abs_diff_pic_num_minus1,
0, (1 + current->field_pic_flag) *
(1 << (sps->log2_max_frame_num_minus4 + 4)), 0);
else if (mopn == 2)
xue(long_term_pic_num,
current->rplm_l0[i].long_term_pic_num,
0, sps->max_num_ref_frames - 1, 0);
}
}
}
if (current->slice_type % 5 == 1) {
flag(ref_pic_list_modification_flag_l1);
if (current->ref_pic_list_modification_flag_l1) {
for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
xue(modification_of_pic_nums_idc,
current->rplm_l1[i].modification_of_pic_nums_idc, 0, 3, 0);
mopn = current->rplm_l1[i].modification_of_pic_nums_idc;
if (mopn == 3)
break;
if (mopn == 0 || mopn == 1)
xue(abs_diff_pic_num_minus1,
current->rplm_l1[i].abs_diff_pic_num_minus1,
0, (1 + current->field_pic_flag) *
(1 << (sps->log2_max_frame_num_minus4 + 4)), 0);
else if (mopn == 2)
xue(long_term_pic_num,
current->rplm_l1[i].long_term_pic_num,
0, sps->max_num_ref_frames - 1, 0);
}
}
}
return 0;
}
static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSliceHeader *current)
{
CodedBitstreamH264Context *h264 = ctx->priv_data;
const H264RawSPS *sps = h264->active_sps;
int chroma;
int err, i, j;
ue(luma_log2_weight_denom, 0, 7);
chroma = !sps->separate_colour_plane_flag && sps->chroma_format_idc != 0;
if (chroma)
ue(chroma_log2_weight_denom, 0, 7);
for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
flags(luma_weight_l0_flag[i], 1, i);
if (current->luma_weight_l0_flag[i]) {
ses(luma_weight_l0[i], -128, +127, 1, i);
ses(luma_offset_l0[i], -128, +127, 1, i);
}
if (chroma) {
flags(chroma_weight_l0_flag[i], 1, i);
if (current->chroma_weight_l0_flag[i]) {
for (j = 0; j < 2; j++) {
ses(chroma_weight_l0[i][j], -128, +127, 2, i, j);
ses(chroma_offset_l0[i][j], -128, +127, 2, i, j);
}
}
}
}
if (current->slice_type % 5 == 1) {
for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
flags(luma_weight_l1_flag[i], 1, i);
if (current->luma_weight_l1_flag[i]) {
ses(luma_weight_l1[i], -128, +127, 1, i);
ses(luma_offset_l1[i], -128, +127, 1, i);
}
if (chroma) {
flags(chroma_weight_l1_flag[i], 1, i);
if (current->chroma_weight_l1_flag[i]) {
for (j = 0; j < 2; j++) {
ses(chroma_weight_l1[i][j], -128, +127, 2, i, j);
ses(chroma_offset_l1[i][j], -128, +127, 2, i, j);
}
}
}
}
}
return 0;
}
static int FUNC(dec_ref_pic_marking)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSliceHeader *current, int idr_pic_flag)
{
CodedBitstreamH264Context *h264 = ctx->priv_data;
const H264RawSPS *sps = h264->active_sps;
int err, i;
uint32_t mmco;
if (idr_pic_flag) {
flag(no_output_of_prior_pics_flag);
flag(long_term_reference_flag);
} else {
flag(adaptive_ref_pic_marking_mode_flag);
if (current->adaptive_ref_pic_marking_mode_flag) {
for (i = 0; i < H264_MAX_MMCO_COUNT; i++) {
xue(memory_management_control_operation,
current->mmco[i].memory_management_control_operation,
0, 6, 0);
mmco = current->mmco[i].memory_management_control_operation;
if (mmco == 0)
break;
if (mmco == 1 || mmco == 3)
xue(difference_of_pic_nums_minus1,
current->mmco[i].difference_of_pic_nums_minus1,
0, INT32_MAX, 0);
if (mmco == 2)
xue(long_term_pic_num,
current->mmco[i].long_term_pic_num,
0, sps->max_num_ref_frames - 1, 0);
if (mmco == 3 || mmco == 6)
xue(long_term_frame_idx,
current->mmco[i].long_term_frame_idx,
0, sps->max_num_ref_frames - 1, 0);
if (mmco == 4)
xue(max_long_term_frame_idx_plus1,
current->mmco[i].max_long_term_frame_idx_plus1,
0, sps->max_num_ref_frames, 0);
}
if (i == H264_MAX_MMCO_COUNT) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many "
"memory management control operations.\n");
return AVERROR_INVALIDDATA;
}
}
}
return 0;
}
static int FUNC(slice_header)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawSliceHeader *current)
{
CodedBitstreamH264Context *h264 = ctx->priv_data;
const H264RawSPS *sps;
const H264RawPPS *pps;
int err;
int idr_pic_flag;
int slice_type_i, slice_type_p, slice_type_b;
int slice_type_si, slice_type_sp;
HEADER("Slice Header");
CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
1 << H264_NAL_SLICE |
1 << H264_NAL_IDR_SLICE |
1 << H264_NAL_AUXILIARY_SLICE));
if (current->nal_unit_header.nal_unit_type == H264_NAL_AUXILIARY_SLICE) {
if (!h264->last_slice_nal_unit_type) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Auxiliary slice "
"is not decodable without the main picture "
"in the same access unit.\n");
return AVERROR_INVALIDDATA;
}
idr_pic_flag = h264->last_slice_nal_unit_type == H264_NAL_IDR_SLICE;
} else {
idr_pic_flag = current->nal_unit_header.nal_unit_type == H264_NAL_IDR_SLICE;
}
ue(first_mb_in_slice, 0, H264_MAX_MB_PIC_SIZE - 1);
ue(slice_type, 0, 9);
slice_type_i = current->slice_type % 5 == 2;
slice_type_p = current->slice_type % 5 == 0;
slice_type_b = current->slice_type % 5 == 1;
slice_type_si = current->slice_type % 5 == 4;
slice_type_sp = current->slice_type % 5 == 3;
if (idr_pic_flag && !(slice_type_i || slice_type_si)) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid slice type %d "
"for IDR picture.\n", current->slice_type);
return AVERROR_INVALIDDATA;
}
ue(pic_parameter_set_id, 0, 255);
pps = h264->pps[current->pic_parameter_set_id];
if (!pps) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",
current->pic_parameter_set_id);
return AVERROR_INVALIDDATA;
}
h264->active_pps = pps;
sps = h264->sps[pps->seq_parameter_set_id];
if (!sps) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
pps->seq_parameter_set_id);
return AVERROR_INVALIDDATA;
}
h264->active_sps = sps;
if (sps->separate_colour_plane_flag)
u(2, colour_plane_id, 0, 2);
ub(sps->log2_max_frame_num_minus4 + 4, frame_num);
if (!sps->frame_mbs_only_flag) {
flag(field_pic_flag);
if (current->field_pic_flag)
flag(bottom_field_flag);
else
infer(bottom_field_flag, 0);
} else {
infer(field_pic_flag, 0);
infer(bottom_field_flag, 0);
}
if (idr_pic_flag)
ue(idr_pic_id, 0, 65535);
if (sps->pic_order_cnt_type == 0) {
ub(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, pic_order_cnt_lsb);
if (pps->bottom_field_pic_order_in_frame_present_flag &&
!current->field_pic_flag)
se(delta_pic_order_cnt_bottom, INT32_MIN + 1, INT32_MAX);
} else if (sps->pic_order_cnt_type == 1) {
if (!sps->delta_pic_order_always_zero_flag) {
se(delta_pic_order_cnt[0], INT32_MIN + 1, INT32_MAX);
if (pps->bottom_field_pic_order_in_frame_present_flag &&
!current->field_pic_flag)
se(delta_pic_order_cnt[1], INT32_MIN + 1, INT32_MAX);
else
infer(delta_pic_order_cnt[1], 0);
} else {
infer(delta_pic_order_cnt[0], 0);
infer(delta_pic_order_cnt[1], 0);
}
}
if (pps->redundant_pic_cnt_present_flag)
ue(redundant_pic_cnt, 0, 127);
else
infer(redundant_pic_cnt, 0);
if (current->nal_unit_header.nal_unit_type != H264_NAL_AUXILIARY_SLICE
&& !current->redundant_pic_cnt)
h264->last_slice_nal_unit_type =
current->nal_unit_header.nal_unit_type;
if (slice_type_b)
flag(direct_spatial_mv_pred_flag);
if (slice_type_p || slice_type_sp || slice_type_b) {
flag(num_ref_idx_active_override_flag);
if (current->num_ref_idx_active_override_flag) {
ue(num_ref_idx_l0_active_minus1, 0, 31);
if (slice_type_b)
ue(num_ref_idx_l1_active_minus1, 0, 31);
} 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 (current->nal_unit_header.nal_unit_type == 20 ||
current->nal_unit_header.nal_unit_type == 21) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC / 3DAVC not supported.\n");
return AVERROR_PATCHWELCOME;
} else {
CHECK(FUNC(ref_pic_list_modification)(ctx, rw, current));
}
if ((pps->weighted_pred_flag && (slice_type_p || slice_type_sp)) ||
(pps->weighted_bipred_idc == 1 && slice_type_b)) {
CHECK(FUNC(pred_weight_table)(ctx, rw, current));
}
if (current->nal_unit_header.nal_ref_idc != 0) {
CHECK(FUNC(dec_ref_pic_marking)(ctx, rw, current, idr_pic_flag));
}
if (pps->entropy_coding_mode_flag &&
!slice_type_i && !slice_type_si) {
ue(cabac_init_idc, 0, 2);
}
se(slice_qp_delta, - 51 - 6 * sps->bit_depth_luma_minus8,
+ 51 + 6 * sps->bit_depth_luma_minus8);
if (slice_type_sp || slice_type_si) {
if (slice_type_sp)
flag(sp_for_switch_flag);
se(slice_qs_delta, -51, +51);
}
if (pps->deblocking_filter_control_present_flag) {
ue(disable_deblocking_filter_idc, 0, 2);
if (current->disable_deblocking_filter_idc != 1) {
se(slice_alpha_c0_offset_div2, -6, +6);
se(slice_beta_offset_div2, -6, +6);
} else {
infer(slice_alpha_c0_offset_div2, 0);
infer(slice_beta_offset_div2, 0);
}
} else {
infer(disable_deblocking_filter_idc, 0);
infer(slice_alpha_c0_offset_div2, 0);
infer(slice_beta_offset_div2, 0);
}
if (pps->num_slice_groups_minus1 > 0 &&
pps->slice_group_map_type >= 3 &&
pps->slice_group_map_type <= 5) {
unsigned int pic_size, max, bits;
pic_size = (sps->pic_width_in_mbs_minus1 + 1) *
(sps->pic_height_in_map_units_minus1 + 1);
max = (pic_size + pps->slice_group_change_rate_minus1) /
(pps->slice_group_change_rate_minus1 + 1);
bits = av_ceil_log2(max + 1);
u(bits, slice_group_change_cycle, 0, max);
}
if (pps->entropy_coding_mode_flag) {
while (byte_alignment(rw))
fixed(1, cabac_alignment_one_bit, 1);
}
return 0;
}
static int FUNC(filler)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawFiller *current)
{
int err;
HEADER("Filler Data");
CHECK(FUNC(nal_unit_header)(ctx, rw, &current->nal_unit_header,
1 << H264_NAL_FILLER_DATA));
#ifdef READ
while (show_bits(rw, 8) == 0xff) {
fixed(8, ff_byte, 0xff);
++current->filler_size;
}
#else
{
uint32_t i;
for (i = 0; i < current->filler_size; i++)
fixed(8, ff_byte, 0xff);
}
#endif
CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
return 0;
}
static int FUNC(end_of_sequence)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawNALUnitHeader *current)
{
HEADER("End of Sequence");
return FUNC(nal_unit_header)(ctx, rw, current,
1 << H264_NAL_END_SEQUENCE);
}
static int FUNC(end_of_stream)(CodedBitstreamContext *ctx, RWContext *rw,
H264RawNALUnitHeader *current)
{
HEADER("End of Stream");
return FUNC(nal_unit_header)(ctx, rw, current,
1 << H264_NAL_END_STREAM);
}
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