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FFmpeg/libavcodec/cbs_h264.h

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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
*/
#ifndef AVCODEC_CBS_H264_H
#define AVCODEC_CBS_H264_H
#include <stddef.h>
#include <stdint.h>
#include "cbs.h"
#include "cbs_h2645.h"
#include "cbs_sei.h"
#include "h264.h"
enum {
// This limit is arbitrary - it is sufficient for one message of each
// type plus some repeats, and will therefore easily cover all sane
// streams. However, it is possible to make technically-valid streams
// for which it will fail (for example, by including a large number of
// user-data-unregistered messages).
H264_MAX_SEI_PAYLOADS = 64,
};
typedef struct H264RawNALUnitHeader {
uint8_t nal_ref_idc;
uint8_t nal_unit_type;
uint8_t svc_extension_flag;
uint8_t avc_3d_extension_flag;
} H264RawNALUnitHeader;
typedef struct H264RawScalingList {
int8_t delta_scale[64];
} H264RawScalingList;
typedef struct H264RawHRD {
uint8_t cpb_cnt_minus1;
uint8_t bit_rate_scale;
uint8_t cpb_size_scale;
uint32_t bit_rate_value_minus1[H264_MAX_CPB_CNT];
uint32_t cpb_size_value_minus1[H264_MAX_CPB_CNT];
uint8_t cbr_flag[H264_MAX_CPB_CNT];
uint8_t initial_cpb_removal_delay_length_minus1;
uint8_t cpb_removal_delay_length_minus1;
uint8_t dpb_output_delay_length_minus1;
uint8_t time_offset_length;
} H264RawHRD;
typedef struct H264RawVUI {
uint8_t aspect_ratio_info_present_flag;
uint8_t aspect_ratio_idc;
uint16_t sar_width;
uint16_t sar_height;
uint8_t overscan_info_present_flag;
uint8_t overscan_appropriate_flag;
uint8_t video_signal_type_present_flag;
uint8_t video_format;
uint8_t video_full_range_flag;
uint8_t colour_description_present_flag;
uint8_t colour_primaries;
uint8_t transfer_characteristics;
uint8_t matrix_coefficients;
uint8_t chroma_loc_info_present_flag;
uint8_t chroma_sample_loc_type_top_field;
uint8_t chroma_sample_loc_type_bottom_field;
uint8_t timing_info_present_flag;
uint32_t num_units_in_tick;
uint32_t time_scale;
uint8_t fixed_frame_rate_flag;
uint8_t nal_hrd_parameters_present_flag;
H264RawHRD nal_hrd_parameters;
uint8_t vcl_hrd_parameters_present_flag;
H264RawHRD vcl_hrd_parameters;
uint8_t low_delay_hrd_flag;
uint8_t pic_struct_present_flag;
uint8_t bitstream_restriction_flag;
uint8_t motion_vectors_over_pic_boundaries_flag;
uint8_t max_bytes_per_pic_denom;
uint8_t max_bits_per_mb_denom;
uint8_t log2_max_mv_length_horizontal;
uint8_t log2_max_mv_length_vertical;
uint8_t max_num_reorder_frames;
uint8_t max_dec_frame_buffering;
} H264RawVUI;
typedef struct H264RawSPS {
H264RawNALUnitHeader nal_unit_header;
uint8_t profile_idc;
uint8_t constraint_set0_flag;
uint8_t constraint_set1_flag;
uint8_t constraint_set2_flag;
uint8_t constraint_set3_flag;
uint8_t constraint_set4_flag;
uint8_t constraint_set5_flag;
uint8_t reserved_zero_2bits;
uint8_t level_idc;
uint8_t seq_parameter_set_id;
uint8_t chroma_format_idc;
uint8_t separate_colour_plane_flag;
uint8_t bit_depth_luma_minus8;
uint8_t bit_depth_chroma_minus8;
uint8_t qpprime_y_zero_transform_bypass_flag;
uint8_t seq_scaling_matrix_present_flag;
uint8_t seq_scaling_list_present_flag[12];
H264RawScalingList scaling_list_4x4[6];
H264RawScalingList scaling_list_8x8[6];
uint8_t log2_max_frame_num_minus4;
uint8_t pic_order_cnt_type;
uint8_t log2_max_pic_order_cnt_lsb_minus4;
uint8_t delta_pic_order_always_zero_flag;
int32_t offset_for_non_ref_pic;
int32_t offset_for_top_to_bottom_field;
uint8_t num_ref_frames_in_pic_order_cnt_cycle;
int32_t offset_for_ref_frame[256];
uint8_t max_num_ref_frames;
uint8_t gaps_in_frame_num_allowed_flag;
uint16_t pic_width_in_mbs_minus1;
uint16_t pic_height_in_map_units_minus1;
uint8_t frame_mbs_only_flag;
uint8_t mb_adaptive_frame_field_flag;
uint8_t direct_8x8_inference_flag;
uint8_t frame_cropping_flag;
uint16_t frame_crop_left_offset;
uint16_t frame_crop_right_offset;
uint16_t frame_crop_top_offset;
uint16_t frame_crop_bottom_offset;
uint8_t vui_parameters_present_flag;
H264RawVUI vui;
} H264RawSPS;
typedef struct H264RawSPSExtension {
H264RawNALUnitHeader nal_unit_header;
uint8_t seq_parameter_set_id;
uint8_t aux_format_idc;
uint8_t bit_depth_aux_minus8;
uint8_t alpha_incr_flag;
uint16_t alpha_opaque_value;
uint16_t alpha_transparent_value;
uint8_t additional_extension_flag;
} H264RawSPSExtension;
typedef struct H264RawPPS {
H264RawNALUnitHeader nal_unit_header;
uint8_t pic_parameter_set_id;
uint8_t seq_parameter_set_id;
uint8_t entropy_coding_mode_flag;
uint8_t bottom_field_pic_order_in_frame_present_flag;
uint8_t num_slice_groups_minus1;
uint8_t slice_group_map_type;
uint16_t run_length_minus1[H264_MAX_SLICE_GROUPS];
uint16_t top_left[H264_MAX_SLICE_GROUPS];
uint16_t bottom_right[H264_MAX_SLICE_GROUPS];
uint8_t slice_group_change_direction_flag;
uint16_t slice_group_change_rate_minus1;
uint16_t pic_size_in_map_units_minus1;
uint8_t *slice_group_id;
AVBufferRef *slice_group_id_ref;
uint8_t num_ref_idx_l0_default_active_minus1;
uint8_t num_ref_idx_l1_default_active_minus1;
uint8_t weighted_pred_flag;
uint8_t weighted_bipred_idc;
int8_t pic_init_qp_minus26;
int8_t pic_init_qs_minus26;
int8_t chroma_qp_index_offset;
uint8_t deblocking_filter_control_present_flag;
uint8_t constrained_intra_pred_flag;
uint8_t more_rbsp_data;
uint8_t redundant_pic_cnt_present_flag;
uint8_t transform_8x8_mode_flag;
uint8_t pic_scaling_matrix_present_flag;
uint8_t pic_scaling_list_present_flag[12];
H264RawScalingList scaling_list_4x4[6];
H264RawScalingList scaling_list_8x8[6];
int8_t second_chroma_qp_index_offset;
} H264RawPPS;
typedef struct H264RawAUD {
H264RawNALUnitHeader nal_unit_header;
uint8_t primary_pic_type;
} H264RawAUD;
typedef struct H264RawSEIBufferingPeriod {
uint8_t seq_parameter_set_id;
struct {
uint32_t initial_cpb_removal_delay[H264_MAX_CPB_CNT];
uint32_t initial_cpb_removal_delay_offset[H264_MAX_CPB_CNT];
} nal, vcl;
} H264RawSEIBufferingPeriod;
typedef struct H264RawSEIPicTimestamp {
uint8_t ct_type;
uint8_t nuit_field_based_flag;
uint8_t counting_type;
uint8_t full_timestamp_flag;
uint8_t discontinuity_flag;
uint8_t cnt_dropped_flag;
uint8_t n_frames;
uint8_t seconds_flag;
uint8_t seconds_value;
uint8_t minutes_flag;
uint8_t minutes_value;
uint8_t hours_flag;
uint8_t hours_value;
int32_t time_offset;
} H264RawSEIPicTimestamp;
typedef struct H264RawSEIPicTiming {
uint32_t cpb_removal_delay;
uint32_t dpb_output_delay;
uint8_t pic_struct;
uint8_t clock_timestamp_flag[3];
H264RawSEIPicTimestamp timestamp[3];
} H264RawSEIPicTiming;
typedef struct H264RawSEIPanScanRect {
uint32_t pan_scan_rect_id;
uint8_t pan_scan_rect_cancel_flag;
uint8_t pan_scan_cnt_minus1;
int32_t pan_scan_rect_left_offset[3];
int32_t pan_scan_rect_right_offset[3];
int32_t pan_scan_rect_top_offset[3];
int32_t pan_scan_rect_bottom_offset[3];
uint16_t pan_scan_rect_repetition_period;
} H264RawSEIPanScanRect;
typedef struct H264RawSEIRecoveryPoint {
uint16_t recovery_frame_cnt;
uint8_t exact_match_flag;
uint8_t broken_link_flag;
uint8_t changing_slice_group_idc;
} H264RawSEIRecoveryPoint;
typedef struct H264RawSEIDisplayOrientation {
uint8_t display_orientation_cancel_flag;
uint8_t hor_flip;
uint8_t ver_flip;
uint16_t anticlockwise_rotation;
uint16_t display_orientation_repetition_period;
uint8_t display_orientation_extension_flag;
} H264RawSEIDisplayOrientation;
typedef struct H264RawSEI {
H264RawNALUnitHeader nal_unit_header;
SEIRawMessageList message_list;
} H264RawSEI;
typedef struct H264RawSliceHeader {
H264RawNALUnitHeader nal_unit_header;
uint32_t first_mb_in_slice;
uint8_t slice_type;
uint8_t pic_parameter_set_id;
uint8_t colour_plane_id;
uint16_t frame_num;
uint8_t field_pic_flag;
uint8_t bottom_field_flag;
uint16_t idr_pic_id;
uint16_t pic_order_cnt_lsb;
int32_t delta_pic_order_cnt_bottom;
int32_t delta_pic_order_cnt[2];
uint8_t redundant_pic_cnt;
uint8_t direct_spatial_mv_pred_flag;
uint8_t num_ref_idx_active_override_flag;
uint8_t num_ref_idx_l0_active_minus1;
uint8_t num_ref_idx_l1_active_minus1;
uint8_t ref_pic_list_modification_flag_l0;
uint8_t ref_pic_list_modification_flag_l1;
struct {
uint8_t modification_of_pic_nums_idc;
int32_t abs_diff_pic_num_minus1;
uint8_t long_term_pic_num;
} rplm_l0[H264_MAX_RPLM_COUNT], rplm_l1[H264_MAX_RPLM_COUNT];
uint8_t luma_log2_weight_denom;
uint8_t chroma_log2_weight_denom;
uint8_t luma_weight_l0_flag[H264_MAX_REFS];
int8_t luma_weight_l0[H264_MAX_REFS];
int8_t luma_offset_l0[H264_MAX_REFS];
uint8_t chroma_weight_l0_flag[H264_MAX_REFS];
int8_t chroma_weight_l0[H264_MAX_REFS][2];
int8_t chroma_offset_l0[H264_MAX_REFS][2];
uint8_t luma_weight_l1_flag[H264_MAX_REFS];
int8_t luma_weight_l1[H264_MAX_REFS];
int8_t luma_offset_l1[H264_MAX_REFS];
uint8_t chroma_weight_l1_flag[H264_MAX_REFS];
int8_t chroma_weight_l1[H264_MAX_REFS][2];
int8_t chroma_offset_l1[H264_MAX_REFS][2];
uint8_t no_output_of_prior_pics_flag;
uint8_t long_term_reference_flag;
uint8_t adaptive_ref_pic_marking_mode_flag;
struct {
uint8_t memory_management_control_operation;
int32_t difference_of_pic_nums_minus1;
uint8_t long_term_pic_num;
uint8_t long_term_frame_idx;
uint8_t max_long_term_frame_idx_plus1;
} mmco[H264_MAX_MMCO_COUNT];
uint8_t cabac_init_idc;
int8_t slice_qp_delta;
uint8_t sp_for_switch_flag;
int8_t slice_qs_delta;
uint8_t disable_deblocking_filter_idc;
int8_t slice_alpha_c0_offset_div2;
int8_t slice_beta_offset_div2;
uint16_t slice_group_change_cycle;
} H264RawSliceHeader;
typedef struct H264RawSlice {
H264RawSliceHeader header;
uint8_t *data;
AVBufferRef *data_ref;
size_t data_size;
int data_bit_start;
} H264RawSlice;
typedef struct H264RawFiller {
H264RawNALUnitHeader nal_unit_header;
uint32_t filler_size;
} H264RawFiller;
typedef struct CodedBitstreamH264Context {
// Reader/writer context in common with the H.265 implementation.
CodedBitstreamH2645Context common;
// All currently available parameter sets. These are updated when
// any parameter set NAL unit is read/written with this context.
AVBufferRef *sps_ref[H264_MAX_SPS_COUNT];
AVBufferRef *pps_ref[H264_MAX_PPS_COUNT];
H264RawSPS *sps[H264_MAX_SPS_COUNT];
H264RawPPS *pps[H264_MAX_PPS_COUNT];
// The currently active parameter sets. These are updated when any
// NAL unit refers to the relevant parameter set. These pointers
// must also be present in the arrays above.
const H264RawSPS *active_sps;
const H264RawPPS *active_pps;
// The NAL unit type of the most recent normal slice. This is required
// to be able to read/write auxiliary slices, because IdrPicFlag is
// otherwise unknown.
uint8_t last_slice_nal_unit_type;
} CodedBitstreamH264Context;
#endif /* AVCODEC_CBS_H264_H */
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