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   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #ifndef AVCODEC_CBS_H264_H
  20 #define AVCODEC_CBS_H264_H
  21
  22 #include <stddef.h>
  23 #include <stdint.h>
  24
  25 #include "cbs.h"
  26 #include "cbs_h2645.h"
  27 #include "cbs_sei.h"
  28 #include "h264.h"
  29
  30
  31 typedef struct H264RawNALUnitHeader {
  32     uint8_t nal_ref_idc;
  33     uint8_t nal_unit_type;
  34
  35     uint8_t svc_extension_flag;
  36     uint8_t avc_3d_extension_flag;
  37 } H264RawNALUnitHeader;
  38
  39 typedef struct H264RawScalingList {
  40     int8_t delta_scale[64];
  41 } H264RawScalingList;
  42
  43 typedef struct H264RawHRD {
  44     uint8_t cpb_cnt_minus1;
  45     uint8_t bit_rate_scale;
  46     uint8_t cpb_size_scale;
  47
  48     uint32_t bit_rate_value_minus1[H264_MAX_CPB_CNT];
  49     uint32_t cpb_size_value_minus1[H264_MAX_CPB_CNT];
  50     uint8_t cbr_flag[H264_MAX_CPB_CNT];
  51
  52     uint8_t initial_cpb_removal_delay_length_minus1;
  53     uint8_t cpb_removal_delay_length_minus1;
  54     uint8_t dpb_output_delay_length_minus1;
  55     uint8_t time_offset_length;
  56 } H264RawHRD;
  57
  58 typedef struct H264RawVUI {
  59     uint8_t aspect_ratio_info_present_flag;
  60     uint8_t aspect_ratio_idc;
  61     uint16_t sar_width;
  62     uint16_t sar_height;
  63
  64     uint8_t overscan_info_present_flag;
  65     uint8_t overscan_appropriate_flag;
  66
  67     uint8_t video_signal_type_present_flag;
  68     uint8_t video_format;
  69     uint8_t video_full_range_flag;
  70     uint8_t colour_description_present_flag;
  71     uint8_t colour_primaries;
  72     uint8_t transfer_characteristics;
  73     uint8_t matrix_coefficients;
  74
  75     uint8_t chroma_loc_info_present_flag;
  76     uint8_t chroma_sample_loc_type_top_field;
  77     uint8_t chroma_sample_loc_type_bottom_field;
  78
  79     uint8_t timing_info_present_flag;
  80     uint32_t num_units_in_tick;
  81     uint32_t time_scale;
  82     uint8_t fixed_frame_rate_flag;
  83
  84     uint8_t nal_hrd_parameters_present_flag;
  85     H264RawHRD nal_hrd_parameters;
  86     uint8_t vcl_hrd_parameters_present_flag;
  87     H264RawHRD vcl_hrd_parameters;
  88     uint8_t low_delay_hrd_flag;
  89
  90     uint8_t pic_struct_present_flag;
  91
  92     uint8_t bitstream_restriction_flag;
  93     uint8_t motion_vectors_over_pic_boundaries_flag;
  94     uint8_t max_bytes_per_pic_denom;
  95     uint8_t max_bits_per_mb_denom;
  96     uint8_t log2_max_mv_length_horizontal;
  97     uint8_t log2_max_mv_length_vertical;
  98     uint8_t max_num_reorder_frames;
  99     uint8_t max_dec_frame_buffering;
 100 } H264RawVUI;
 101
 102 typedef struct H264RawSPS {
 103     H264RawNALUnitHeader nal_unit_header;
 104
 105     uint8_t profile_idc;
 106     uint8_t constraint_set0_flag;
 107     uint8_t constraint_set1_flag;
 108     uint8_t constraint_set2_flag;
 109     uint8_t constraint_set3_flag;
 110     uint8_t constraint_set4_flag;
 111     uint8_t constraint_set5_flag;
 112     uint8_t reserved_zero_2bits;
 113     uint8_t level_idc;
 114
 115     uint8_t seq_parameter_set_id;
 116
 117     uint8_t chroma_format_idc;
 118     uint8_t separate_colour_plane_flag;
 119     uint8_t bit_depth_luma_minus8;
 120     uint8_t bit_depth_chroma_minus8;
 121     uint8_t qpprime_y_zero_transform_bypass_flag;
 122
 123     uint8_t seq_scaling_matrix_present_flag;
 124     uint8_t seq_scaling_list_present_flag[12];
 125     H264RawScalingList scaling_list_4x4[6];
 126     H264RawScalingList scaling_list_8x8[6];
 127
 128     uint8_t log2_max_frame_num_minus4;
 129     uint8_t pic_order_cnt_type;
 130     uint8_t log2_max_pic_order_cnt_lsb_minus4;
 131     uint8_t delta_pic_order_always_zero_flag;
 132     int32_t offset_for_non_ref_pic;
 133     int32_t offset_for_top_to_bottom_field;
 134     uint8_t num_ref_frames_in_pic_order_cnt_cycle;
 135     int32_t offset_for_ref_frame[256];
 136
 137     uint8_t max_num_ref_frames;
 138     uint8_t gaps_in_frame_num_allowed_flag;
 139
 140     uint16_t pic_width_in_mbs_minus1;
 141     uint16_t pic_height_in_map_units_minus1;
 142
 143     uint8_t frame_mbs_only_flag;
 144     uint8_t mb_adaptive_frame_field_flag;
 145     uint8_t direct_8x8_inference_flag;
 146
 147     uint8_t frame_cropping_flag;
 148     uint16_t frame_crop_left_offset;
 149     uint16_t frame_crop_right_offset;
 150     uint16_t frame_crop_top_offset;
 151     uint16_t frame_crop_bottom_offset;
 152
 153     uint8_t vui_parameters_present_flag;
 154     H264RawVUI vui;
 155 } H264RawSPS;
 156
 157 typedef struct H264RawSPSExtension {
 158     H264RawNALUnitHeader nal_unit_header;
 159
 160     uint8_t seq_parameter_set_id;
 161
 162     uint8_t aux_format_idc;
 163     uint8_t bit_depth_aux_minus8;
 164     uint8_t alpha_incr_flag;
 165     uint16_t alpha_opaque_value;
 166     uint16_t alpha_transparent_value;
 167
 168     uint8_t additional_extension_flag;
 169 } H264RawSPSExtension;
 170
 171 typedef struct H264RawPPS {
 172     H264RawNALUnitHeader nal_unit_header;
 173
 174     uint8_t pic_parameter_set_id;
 175     uint8_t seq_parameter_set_id;
 176
 177     uint8_t entropy_coding_mode_flag;
 178     uint8_t bottom_field_pic_order_in_frame_present_flag;
 179
 180     uint8_t num_slice_groups_minus1;
 181     uint8_t slice_group_map_type;
 182     uint16_t run_length_minus1[H264_MAX_SLICE_GROUPS];
 183     uint16_t top_left[H264_MAX_SLICE_GROUPS];
 184     uint16_t bottom_right[H264_MAX_SLICE_GROUPS];
 185     uint8_t slice_group_change_direction_flag;
 186     uint16_t slice_group_change_rate_minus1;
 187     uint16_t pic_size_in_map_units_minus1;
 188
 189     uint8_t *slice_group_id;
 190     AVBufferRef *slice_group_id_ref;
 191
 192     uint8_t num_ref_idx_l0_default_active_minus1;
 193     uint8_t num_ref_idx_l1_default_active_minus1;
 194
 195     uint8_t weighted_pred_flag;
 196     uint8_t weighted_bipred_idc;
 197
 198     int8_t pic_init_qp_minus26;
 199     int8_t pic_init_qs_minus26;
 200     int8_t chroma_qp_index_offset;
 201
 202     uint8_t deblocking_filter_control_present_flag;
 203     uint8_t constrained_intra_pred_flag;
 204
 205     uint8_t more_rbsp_data;
 206
 207     uint8_t redundant_pic_cnt_present_flag;
 208     uint8_t transform_8x8_mode_flag;
 209
 210     uint8_t pic_scaling_matrix_present_flag;
 211     uint8_t pic_scaling_list_present_flag[12];
 212     H264RawScalingList scaling_list_4x4[6];
 213     H264RawScalingList scaling_list_8x8[6];
 214
 215     int8_t second_chroma_qp_index_offset;
 216 } H264RawPPS;
 217
 218 typedef struct H264RawAUD {
 219     H264RawNALUnitHeader nal_unit_header;
 220
 221     uint8_t primary_pic_type;
 222 } H264RawAUD;
 223
 224 typedef struct H264RawSEIBufferingPeriod {
 225     uint8_t seq_parameter_set_id;
 226     struct {
 227         uint32_t initial_cpb_removal_delay[H264_MAX_CPB_CNT];
 228         uint32_t initial_cpb_removal_delay_offset[H264_MAX_CPB_CNT];
 229     } nal, vcl;
 230 } H264RawSEIBufferingPeriod;
 231
 232 typedef struct H264RawSEIPicTimestamp {
 233     uint8_t ct_type;
 234     uint8_t nuit_field_based_flag;
 235     uint8_t counting_type;
 236     uint8_t full_timestamp_flag;
 237     uint8_t discontinuity_flag;
 238     uint8_t cnt_dropped_flag;
 239     uint8_t n_frames;
 240     uint8_t seconds_flag;
 241     uint8_t seconds_value;
 242     uint8_t minutes_flag;
 243     uint8_t minutes_value;
 244     uint8_t hours_flag;
 245     uint8_t hours_value;
 246     int32_t time_offset;
 247 } H264RawSEIPicTimestamp;
 248
 249 typedef struct H264RawSEIPicTiming {
 250     uint32_t cpb_removal_delay;
 251     uint32_t dpb_output_delay;
 252     uint8_t pic_struct;
 253     uint8_t clock_timestamp_flag[3];
 254     H264RawSEIPicTimestamp timestamp[3];
 255 } H264RawSEIPicTiming;
 256
 257 typedef struct H264RawSEIPanScanRect {
 258     uint32_t pan_scan_rect_id;
 259     uint8_t  pan_scan_rect_cancel_flag;
 260     uint8_t  pan_scan_cnt_minus1;
 261     int32_t  pan_scan_rect_left_offset[3];
 262     int32_t  pan_scan_rect_right_offset[3];
 263     int32_t  pan_scan_rect_top_offset[3];
 264     int32_t  pan_scan_rect_bottom_offset[3];
 265     uint16_t pan_scan_rect_repetition_period;
 266 } H264RawSEIPanScanRect;
 267
 268 typedef struct H264RawSEIRecoveryPoint {
 269     uint16_t recovery_frame_cnt;
 270     uint8_t exact_match_flag;
 271     uint8_t broken_link_flag;
 272     uint8_t changing_slice_group_idc;
 273 } H264RawSEIRecoveryPoint;
 274
 275 typedef struct H264RawSEIDisplayOrientation {
 276     uint8_t display_orientation_cancel_flag;
 277     uint8_t hor_flip;
 278     uint8_t ver_flip;
 279     uint16_t anticlockwise_rotation;
 280     uint16_t display_orientation_repetition_period;
 281     uint8_t display_orientation_extension_flag;
 282 } H264RawSEIDisplayOrientation;
 283
 284 typedef struct H264RawSEI {
 285     H264RawNALUnitHeader nal_unit_header;
 286     SEIRawMessageList    message_list;
 287 } H264RawSEI;
 288
 289 typedef struct H264RawSliceHeader {
 290     H264RawNALUnitHeader nal_unit_header;
 291
 292     uint32_t first_mb_in_slice;
 293     uint8_t slice_type;
 294
 295     uint8_t pic_parameter_set_id;
 296
 297     uint8_t colour_plane_id;
 298
 299     uint16_t frame_num;
 300     uint8_t field_pic_flag;
 301     uint8_t bottom_field_flag;
 302
 303     uint16_t idr_pic_id;
 304
 305     uint16_t pic_order_cnt_lsb;
 306     int32_t delta_pic_order_cnt_bottom;
 307     int32_t delta_pic_order_cnt[2];
 308
 309     uint8_t redundant_pic_cnt;
 310     uint8_t direct_spatial_mv_pred_flag;
 311
 312     uint8_t num_ref_idx_active_override_flag;
 313     uint8_t num_ref_idx_l0_active_minus1;
 314     uint8_t num_ref_idx_l1_active_minus1;
 315
 316     uint8_t ref_pic_list_modification_flag_l0;
 317     uint8_t ref_pic_list_modification_flag_l1;
 318     struct {
 319         uint8_t modification_of_pic_nums_idc;
 320         int32_t abs_diff_pic_num_minus1;
 321         uint8_t long_term_pic_num;
 322     } rplm_l0[H264_MAX_RPLM_COUNT], rplm_l1[H264_MAX_RPLM_COUNT];
 323
 324     uint8_t luma_log2_weight_denom;
 325     uint8_t chroma_log2_weight_denom;
 326
 327     uint8_t luma_weight_l0_flag[H264_MAX_REFS];
 328     int8_t luma_weight_l0[H264_MAX_REFS];
 329     int8_t luma_offset_l0[H264_MAX_REFS];
 330     uint8_t chroma_weight_l0_flag[H264_MAX_REFS];
 331     int8_t chroma_weight_l0[H264_MAX_REFS][2];
 332     int8_t chroma_offset_l0[H264_MAX_REFS][2];
 333
 334     uint8_t luma_weight_l1_flag[H264_MAX_REFS];
 335     int8_t luma_weight_l1[H264_MAX_REFS];
 336     int8_t luma_offset_l1[H264_MAX_REFS];
 337     uint8_t chroma_weight_l1_flag[H264_MAX_REFS];
 338     int8_t chroma_weight_l1[H264_MAX_REFS][2];
 339     int8_t chroma_offset_l1[H264_MAX_REFS][2];
 340
 341     uint8_t no_output_of_prior_pics_flag;
 342     uint8_t long_term_reference_flag;
 343
 344     uint8_t adaptive_ref_pic_marking_mode_flag;
 345     struct {
 346         uint8_t memory_management_control_operation;
 347         int32_t difference_of_pic_nums_minus1;
 348         uint8_t long_term_pic_num;
 349         uint8_t long_term_frame_idx;
 350         uint8_t max_long_term_frame_idx_plus1;
 351     } mmco[H264_MAX_MMCO_COUNT];
 352
 353     uint8_t cabac_init_idc;
 354
 355     int8_t slice_qp_delta;
 356
 357     uint8_t sp_for_switch_flag;
 358     int8_t slice_qs_delta;
 359
 360     uint8_t disable_deblocking_filter_idc;
 361     int8_t slice_alpha_c0_offset_div2;
 362     int8_t slice_beta_offset_div2;
 363
 364     uint16_t slice_group_change_cycle;
 365 } H264RawSliceHeader;
 366
 367 typedef struct H264RawSlice {
 368     H264RawSliceHeader header;
 369
 370     uint8_t     *data;
 371     AVBufferRef *data_ref;
 372     size_t       data_size;
 373     int          data_bit_start;
 374 } H264RawSlice;
 375
 376 typedef struct H264RawFiller {
 377     H264RawNALUnitHeader nal_unit_header;
 378
 379     uint32_t filler_size;
 380 } H264RawFiller;
 381
 382
 383 typedef struct CodedBitstreamH264Context {
 384     // Reader/writer context in common with the H.265 implementation.
 385     CodedBitstreamH2645Context common;
 386
 387     // All currently available parameter sets.  These are updated when
 388     // any parameter set NAL unit is read/written with this context.
 389     AVBufferRef *sps_ref[H264_MAX_SPS_COUNT];
 390     AVBufferRef *pps_ref[H264_MAX_PPS_COUNT];
 391     H264RawSPS *sps[H264_MAX_SPS_COUNT];
 392     H264RawPPS *pps[H264_MAX_PPS_COUNT];
 393
 394     // The currently active parameter sets.  These are updated when any
 395     // NAL unit refers to the relevant parameter set.  These pointers
 396     // must also be present in the arrays above.
 397     const H264RawSPS *active_sps;
 398     const H264RawPPS *active_pps;
 399
 400     // The NAL unit type of the most recent normal slice.  This is required
 401     // to be able to read/write auxiliary slices, because IdrPicFlag is
 402     // otherwise unknown.
 403     uint8_t last_slice_nal_unit_type;
 404 } CodedBitstreamH264Context;
 405
 406 #endif /* AVCODEC_CBS_H264_H */