gsth264parser.h 22.2 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59
/* Gstreamer
 * Copyright (C) <2011> Intel Corporation
 * Copyright (C) <2011> Collabora Ltd.
 * Copyright (C) <2011> Thibault Saunier <thibault.saunier@collabora.com>
 *
 * Some bits C-c,C-v'ed and s/4/3 from h264parse and videoparsers/h264parse.c:
 *    Copyright (C) <2010> Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>
 *    Copyright (C) <2010> Collabora Multimedia
 *    Copyright (C) <2010> Nokia Corporation
 *
 *    (C) 2005 Michal Benes <michal.benes@itonis.tv>
 *    (C) 2008 Wim Taymans <wim.taymans@gmail.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef __GST_H264_PARSER_H__
#define __GST_H264_PARSER_H__

#include <gst/gst.h>

G_BEGIN_DECLS

#define GST_H264_MAX_SPS_COUNT   32
#define GST_H264_MAX_PPS_COUNT   256

#define GST_H264_IS_P_SLICE(slice)  (((slice)->type % 5) == GST_H264_P_SLICE)
#define GST_H264_IS_B_SLICE(slice)  (((slice)->type % 5) == GST_H264_B_SLICE)
#define GST_H264_IS_I_SLICE(slice)  (((slice)->type % 5) == GST_H264_I_SLICE)
#define GST_H264_IS_SP_SLICE(slice) (((slice)->type % 5) == GST_H264_SP_SLICE)
#define GST_H264_IS_SI_SLICE(slice) (((slice)->type % 5) == GST_H264_SI_SLICE)

/**
 * GstH264NalUnitType:
 * @GST_H264_NAL_UNKNOWN: Unkonw nal type
 * @GST_H264_NAL_SLICE: Slice nal
 * @GST_H264_NAL_SLICE_DPA: DPA slice nal
 * @GST_H264_NAL_SLICE_DPB: DPB slice nal
 * @GST_H264_NAL_SLICE_DPC: DPC slice nal
 * @GST_H264_NAL_SLICE_IDR: DPR slice nal
 * @GST_H264_NAL_SEI: Supplemental enhancement information nal unit
 * @GST_H264_NAL_SPS: Sequence parameter set nal unit
 * @GST_H264_NAL_PPS: Picture parameter set nal unit
 * @GST_H264_NAL_AU_DELIMITER: Access unit delimiter nal unit
 * @GST_H264_NAL_SEQ_END: End of sequence nal unit
 * @GST_H264_NAL_STREAM_END: End of stream nal unit
60
 * @GST_H264_NAL_FILLER_DATA: Filler data na lunit
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476
 *
 * Indicates the type of H264 Nal Units
 */
typedef enum
{
  GST_H264_NAL_UNKNOWN      = 0,
  GST_H264_NAL_SLICE        = 1,
  GST_H264_NAL_SLICE_DPA    = 2,
  GST_H264_NAL_SLICE_DPB    = 3,
  GST_H264_NAL_SLICE_DPC    = 4,
  GST_H264_NAL_SLICE_IDR    = 5,
  GST_H264_NAL_SEI          = 6,
  GST_H264_NAL_SPS          = 7,
  GST_H264_NAL_PPS          = 8,
  GST_H264_NAL_AU_DELIMITER = 9,
  GST_H264_NAL_SEQ_END      = 10,
  GST_H264_NAL_STREAM_END   = 11,
  GST_H264_NAL_FILLER_DATA  = 12
} GstH264NalUnitType;

/**
 * GstH264ParserResult:
 * @GST_H264_PARSER_OK: The parsing succeded
 * @GST_H264_PARSER_BROKEN_DATA: The data we parsed where broken
 * @GST_H264_PARSER_BROKEN_LINK: The link to a needed struct for the parsing couldn't be found
 * @GST_H264_PARSER_ERROR: An error accured when parsing
 * @GST_H264_PARSER_NO_NAL: No nal found during the parsing
 * @GST_H264_PARSER_NO_NAL_END: Start of the nal found, not the end.
 *
 * Information about how the parsing of a H264 elements went.
 */
typedef enum
{
  GST_H264_PARSER_OK,
  GST_H264_PARSER_BROKEN_DATA,
  GST_H264_PARSER_BROKEN_LINK,
  GST_H264_PARSER_ERROR,
  GST_H264_PARSER_NO_NAL,
  GST_H264_PARSER_NO_NAL_END
} GstH264ParserResult;

/**
 * GstH264SEIPayloadType:
 * @GST_H264_SEI_BUF_PERIOD: The Sei Message contains a buffering period message
 * @GST_H264_SEI_PIC_TIMING: The Sei Message contains a picture timing message
 * ...
 *
 * The type of the SEI message information
 */
typedef enum
{
  GST_H264_SEI_BUF_PERIOD = 0,
  GST_H264_SEI_PIC_TIMING = 1
      /* and more...  */
} GstH264SEIPayloadType;

/**
 * GstH264SEIPicStructType:
 * @GST_H264_SEI_PIC_STRUCT_FRAME: Picture is a frame
 * @GST_H264_SEI_PIC_STRUCT_TOP_FIELD: Top field of frame
 * @GST_H264_SEI_PIC_STRUCT_BOTTOM_FIELD: Botom field of frame
 * @GST_H264_SEI_PIC_STRUCT_TOP_BOTTOM: Top bottom field of frame
 * @GST_H264_SEI_PIC_STRUCT_BOTTOM_TOP: bottom top field of frame
 * @GST_H264_SEI_PIC_STRUCT_TOP_BOTTOM_TOP: top bottom top field of frame
 * @GST_H264_SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM: bottom top bottom field of frame
 * @GST_H264_SEI_PIC_STRUCT_FRAME_DOUBLING: indicates that the frame should
 *  be displayed two times consecutively
 * @GST_H264_SEI_PIC_STRUCT_FRAME_TRIPLING: indicates that the frame should be
 *  displayed three times consecutively
 *
 * SEI pic_struct type
 */
typedef enum
{
  GST_H264_SEI_PIC_STRUCT_FRAME             = 0,
  GST_H264_SEI_PIC_STRUCT_TOP_FIELD         = 1,
  GST_H264_SEI_PIC_STRUCT_BOTTOM_FIELD      = 2,
  GST_H264_SEI_PIC_STRUCT_TOP_BOTTOM        = 3,
  GST_H264_SEI_PIC_STRUCT_BOTTOM_TOP        = 4,
  GST_H264_SEI_PIC_STRUCT_TOP_BOTTOM_TOP    = 5,
  GST_H264_SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6,
  GST_H264_SEI_PIC_STRUCT_FRAME_DOUBLING    = 7,
  GST_H264_SEI_PIC_STRUCT_FRAME_TRIPLING    = 8
} GstH264SEIPicStructType;

typedef enum
{
  GST_H264_P_SLICE    = 0,
  GST_H264_B_SLICE    = 1,
  GST_H264_I_SLICE    = 2,
  GST_H264_SP_SLICE   = 3,
  GST_H264_SI_SLICE   = 4,
  GST_H264_S_P_SLICE  = 5,
  GST_H264_S_B_SLICE  = 6,
  GST_H264_S_I_SLICE  = 7,
  GST_H264_S_SP_SLICE = 8,
  GST_H264_S_SI_SLICE = 9
} GstH264SliceType;

typedef struct _GstH264NalParser        GstH264NalParser;

typedef struct _GstH264NalUnit          GstH264NalUnit;

typedef struct _GstH264SPS              GstH264SPS;
typedef struct _GstH264PPS              GstH264PPS;
typedef struct _GstH264HRDParams        GstH264HRDParams;
typedef struct _GstH264VUIParams        GstH264VUIParams;

typedef struct _GstH264DecRefPicMarking GstH264DecRefPicMarking;
typedef struct _GstH264RefPicMarking    GstH264RefPicMarking;
typedef struct _GstH264PredWeightTable  GstH264PredWeightTable;
typedef struct _GstH264SliceHdr         GstH264SliceHdr;

typedef struct _GstH264ClockTimestamp   GstH264ClockTimestamp;
typedef struct _GstH264PicTiming        GstH264PicTiming;
typedef struct _GstH264BufferingPeriod  GstH264BufferingPeriod;
typedef struct _GstH264SEIMessage       GstH264SEIMessage;

/**
 * GstH264NalUnit:
 * @ref_idc: not equal to 0 specifies that the content of the NAL unit contains a sequence
 *  parameter set, a sequence * parameter set extension, a subset sequence parameter set, a
 *  picture parameter set, a slice of a reference picture, a slice data partition of a
 *  reference picture, or a prefix NAL unit preceding a slice of a reference picture.
 * @type: A #GstH264NalUnitType
 * @idr_pic_flag: calculated idr_pic_flag
 * @size: The size of the nal unit starting from @offset
 * @offset: The offset of the actual start of the nal unit
 * @sc_offset:The offset of the start code of the nal unit
 * @valid: If the nal unit is valid, which mean it has
 * already been parsed
 * @data: The data from which the Nalu has been parsed
 *
 * Structure defining the Nal unit headers
 */
struct _GstH264NalUnit
{
  guint16 ref_idc;
  guint16 type;

  /* calculated values */
  guint8 idr_pic_flag;
  guint size;
  guint offset;
  guint sc_offset;
  gboolean valid;

  guint8 *data;
};

/**
 * GstH264HRDParams:
 * @cpb_cnt_minus1: plus 1 specifies the number of alternative
 *    CPB specifications in the bitstream
 * @bit_rate_scale: specifies the maximum input bit rate of the
 * SchedSelIdx-th CPB
 * @cpb_size_scale: specifies the CPB size of the SchedSelIdx-th CPB
 * @guint32 bit_rate_value_minus1: specifies the maximum input bit rate for the
 * SchedSelIdx-th CPB
 * @cpb_size_value_minus1: is used together with cpb_size_scale to specify the
 * SchedSelIdx-th CPB size
 * @cbr_flag: Specifies if running in itermediate bitrate mode or constant
 * @initial_cpb_removal_delay_length_minus1: specifies the length in bits of
 * the cpb_removal_delay syntax element
 * @cpb_removal_delay_length_minus1: specifies the length in bits of the
 * dpb_output_delay syntax element
 * @dpb_output_delay_length_minus1: >0 specifies the length in bits of the time_offset syntax element.
 * =0 specifies that the time_offset syntax element is not present
 * @time_offset_length: Length of the time offset
 *
 * Defines the HRD parameters
 */
struct _GstH264HRDParams
{
  guint8 cpb_cnt_minus1;
  guint8 bit_rate_scale;
  guint8 cpb_size_scale;

  guint32 bit_rate_value_minus1[32];
  guint32 cpb_size_value_minus1[32];
  guint8 cbr_flag[32];

  guint8 initial_cpb_removal_delay_length_minus1;
  guint8 cpb_removal_delay_length_minus1;
  guint8 dpb_output_delay_length_minus1;
  guint8 time_offset_length;
};

/**
 * GstH264VUIParams:
 * @aspect_ratio_info_present_flag: %TRUE specifies that aspect_ratio_idc is present.
 *  %FALSE specifies that aspect_ratio_idc is not present
 * @aspect_ratio_idc specifies the value of the sample aspect ratio of the luma samples
 * @sar_width indicates the horizontal size of the sample aspect ratio
 * @sar_height indicates the vertical size of the sample aspect ratio
 * @overscan_info_present_flag: %TRUE overscan_appropriate_flag is present %FALSE otherwize
 * @overscan_appropriate_flag: %TRUE indicates that the cropped decoded pictures
 *  output are suitable for display using overscan. %FALSE the cropped decoded pictures
 *  output contain visually important information
 * @video_signal_type_present_flag: %TRUE specifies that video_format, video_full_range_flag and
 *  colour_description_present_flag are present.
 * @video_format: indicates the representation of the picture
 * @video_full_range_flag: indicates the black level and range of the luma and chroma signals
 * @colour_description_present_flag: %TRUE specifies that colour_primaries,
 *  transfer_characteristics and matrix_coefficients are present
 * @colour_primaries: indicates the chromaticity coordinates of the source primaries
 * @transfer_characteristics: indicates the opto-electronic transfer characteristic
 * @matrix_coefficients: describes the matrix coefficients used in deriving luma and chroma signals
 * @chroma_loc_info_present_flag: %TRUE specifies that chroma_sample_loc_type_top_field and
 *  chroma_sample_loc_type_bottom_field are present, %FALSE otherwize
 * @chroma_sample_loc_type_top_field: specify the location of chroma for top field
 * @chroma_sample_loc_type_bottom_field specify the location of chroma for bottom field
 * @timing_info_present_flag: %TRUE specifies that num_units_in_tick,
 *  time_scale and fixed_frame_rate_flag are present in the bitstream
 * @num_units_in_tick: is the number of time units of a clock operating at the frequency time_scale Hz
 * time_scale: is the number of time units that pass in one second
 * @fixed_frame_rate_flag: %TRUE indicates that the temporal distance between the HRD output times
 *  of any two consecutive pictures in output order is constrained as specified in the spec, %FALSE
 *  otherwize.
 * @nal_hrd_parameters_present_flag: %TRUE if nal hrd parameters present in the bitstream
 * @vcl_hrd_parameters_present_flag: %TRUE if nal vlc hrd parameters present in the bitstream
 * @low_delay_hrd_flag: specifies the HRD operational mode
 * @pic_struct_present_flag: %TRUE specifies that picture timing SEI messages are present or not
 * @bitstream_restriction_flag: %TRUE specifies that the following coded video sequence bitstream restriction
 * parameters are present
 * @motion_vectors_over_pic_boundaries_flag: %FALSE indicates that no sample outside the
 *  picture boundaries and no sample at a fractional sample position, %TRUE indicates that one or more
 *  samples outside picture boundaries may be used in inter prediction
 * @max_bytes_per_pic_denom: indicates a number of bytes not exceeded by the sum of the sizes of
 *  the VCL NAL units associated with any coded picture in the coded video sequence.
 * @max_bits_per_mb_denom: indicates the maximum number of coded bits of macroblock_layer()
 * @log2_max_mv_length_horizontal: indicate the maximum absolute value of a decoded horizontal
 * motion vector component
 * @log2_max_mv_length_vertical: indicate the maximum absolute value of a decoded vertical
 *  motion vector component
 * @num_reorder_frames: indicates the maximum number of frames, complementary field pairs,
 *  or non-paired fields that precede any frame,
 * @max_dec_frame_buffering: specifies the required size of the HRD decoded picture buffer in
 *  units of frame buffers.
 *
 * The structure representing the VUI parameters.
 */
struct _GstH264VUIParams
{
  guint8 aspect_ratio_info_present_flag;
  guint8 aspect_ratio_idc;
  /* if aspect_ratio_idc == 255 */
  guint16 sar_width;
  guint16 sar_height;

  guint8 overscan_info_present_flag;
  /* if overscan_info_present_flag */
  guint8 overscan_appropriate_flag;

  guint8 video_signal_type_present_flag;
  guint8 video_format;
  guint8 video_full_range_flag;
  guint8 colour_description_present_flag;
  guint8 colour_primaries;
  guint8 transfer_characteristics;
  guint8 matrix_coefficients;

  guint8 chroma_loc_info_present_flag;
  guint8 chroma_sample_loc_type_top_field;
  guint8 chroma_sample_loc_type_bottom_field;

  guint8 timing_info_present_flag;
  /* if timing_info_present_flag */
  guint32 num_units_in_tick;
  guint32 time_scale;
  guint8 fixed_frame_rate_flag;

  guint8 nal_hrd_parameters_present_flag;
  /* if nal_hrd_parameters_present_flag */
  GstH264HRDParams nal_hrd_parameters;

  guint8 vcl_hrd_parameters_present_flag;
  /* if nal_hrd_parameters_present_flag */
  GstH264HRDParams vcl_hrd_parameters;

  guint8 low_delay_hrd_flag;
  guint8 pic_struct_present_flag;

  guint8 bitstream_restriction_flag;
  /*  if bitstream_restriction_flag */
  guint8 motion_vectors_over_pic_boundaries_flag;
  guint32 max_bytes_per_pic_denom;
  guint32 max_bits_per_mb_denom;
  guint32 log2_max_mv_length_horizontal;
  guint32 log2_max_mv_length_vertical;
  guint32 num_reorder_frames;
  guint32 max_dec_frame_buffering;
};

/**
 * GstH264SPS:
 * @id: The ID of the sequence parameter set
 * @profile_idc: indicate the profile to which the coded video sequence conforms
 *
 *
 */
struct _GstH264SPS
{
  gint id;

  guint8 profile_idc;
  guint8 constraint_set0_flag;
  guint8 constraint_set1_flag;
  guint8 constraint_set2_flag;
  guint8 constraint_set3_flag;
  guint8 level_idc;

  guint8 chroma_format_idc;
  guint8 separate_colour_plane_flag;
  guint8 bit_depth_luma_minus8;
  guint8 bit_depth_chroma_minus8;
  guint8 qpprime_y_zero_transform_bypass_flag;

  guint8 scaling_matrix_present_flag;
  guint8 scaling_lists_4x4[6][16];
  guint8 scaling_lists_8x8[6][64];

  guint8 log2_max_frame_num_minus4;
  guint8 pic_order_cnt_type;

  /* if pic_order_cnt_type == 0 */
  guint8 log2_max_pic_order_cnt_lsb_minus4;

  /* else if pic_order_cnt_type == 1 */
  guint8 delta_pic_order_always_zero_flag;
  gint32 offset_for_non_ref_pic;
  gint32 offset_for_top_to_bottom_field;
  guint8 num_ref_frames_in_pic_order_cnt_cycle;
  gint32 offset_for_ref_frame[255];

  guint32 num_ref_frames;
  guint8 gaps_in_frame_num_value_allowed_flag;
  guint32 pic_width_in_mbs_minus1;
  guint32 pic_height_in_map_units_minus1;
  guint8 frame_mbs_only_flag;

  guint8 mb_adaptive_frame_field_flag;

  guint8 direct_8x8_inference_flag;

  guint8 frame_cropping_flag;

  /* if frame_cropping_flag */
  guint32 frame_crop_left_offset;
  guint32 frame_crop_right_offset;
  guint32 frame_crop_top_offset;
  guint32 frame_crop_bottom_offset;

  guint8 vui_parameters_present_flag;
  /* if vui_parameters_present_flag */
 GstH264VUIParams vui_parameters;

  /* calculated values */
  guint8 chroma_array_type;
  guint32 max_frame_num;
  gint width, height;
  gint fps_num, fps_den;
  gboolean valid;
};

struct _GstH264PPS
{
  gint id;

  GstH264SPS *sequence;

  guint8 entropy_coding_mode_flag;
  guint8 pic_order_present_flag;

  guint32 num_slice_groups_minus1;

  /* if num_slice_groups_minus1 > 0 */
  guint8 slice_group_map_type;
  /* and if slice_group_map_type == 0 */
  guint32 run_length_minus1[8];
  /* or if slice_group_map_type == 2 */
  guint32 top_left[8];
  guint32 bottom_right[8];
  /* or if slice_group_map_type == (3, 4, 5) */
  guint8 slice_group_change_direction_flag;
  guint32 slice_group_change_rate_minus1;
  /* or if slice_group_map_type == 6 */
  guint32 pic_size_in_map_units_minus1;
  guint8 *slice_group_id;

  guint8 num_ref_idx_l0_active_minus1;
  guint8 num_ref_idx_l1_active_minus1;
  guint8 weighted_pred_flag;
  guint8 weighted_bipred_idc;
  gint8 pic_init_qp_minus26;
  gint8 pic_init_qs_minus26;
  gint8 chroma_qp_index_offset;
  guint8 deblocking_filter_control_present_flag;
  guint8 constrained_intra_pred_flag;
  guint8 redundant_pic_cnt_present_flag;

  guint8 transform_8x8_mode_flag;

  guint8 scaling_lists_4x4[6][16];
  guint8 scaling_lists_8x8[6][64];

  guint8 second_chroma_qp_index_offset;

  gboolean valid;
};

struct _GstH264PredWeightTable
{
  guint8 luma_log2_weight_denom;
  guint8 chroma_log2_weight_denom;

477 478
  gint16 luma_weight_l0[32];
  gint8 luma_offset_l0[32];
479 480

  /* if seq->ChromaArrayType != 0 */
481 482
  gint16 chroma_weight_l0[32][2];
  gint8 chroma_offset_l0[32][2];
483 484

  /* if slice->slice_type % 5 == 1 */
485 486 487
  gint16 luma_weight_l1[32];
  gint8 luma_offset_l1[32];

488
  /* and if seq->ChromaArrayType != 0 */
489 490
  gint16 chroma_weight_l1[32][2];
  gint8 chroma_offset_l1[32][2];
491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549
};

struct _GstH264RefPicMarking
{
  guint8 memory_management_control_operation;

  guint32 difference_of_pic_nums_minus1;
  guint32 long_term_pic_num;
  guint32 long_term_frame_idx;
  guint32 max_long_term_frame_idx_plus1;
};

struct _GstH264DecRefPicMarking
{
  /* if slice->nal_unit.IdrPicFlag */
  guint8 no_output_of_prior_pics_flag;
  guint8 long_term_reference_flag;

  guint8 adaptive_ref_pic_marking_mode_flag;
  GstH264RefPicMarking ref_pic_marking[10];
  guint8 n_ref_pic_marking;
};


struct _GstH264SliceHdr
{
  guint32 first_mb_in_slice;
  guint32 type;
  GstH264PPS *pps;

  /* if seq->separate_colour_plane_flag */
  guint8 colour_plane_id;

  guint16 frame_num;

  guint8 field_pic_flag;
  guint8 bottom_field_flag;

  /* if nal_unit.type == 5 */
  guint16 idr_pic_id;

  /* if seq->pic_order_cnt_type == 0 */
  guint16 pic_order_cnt_lsb;
  /* if seq->pic_order_present_flag && !field_pic_flag */
  gint32 delta_pic_order_cnt_bottom;

  gint32 delta_pic_order_cnt[2];
  guint8 redundant_pic_cnt;

  /* if slice_type == B_SLICE */
  guint8 direct_spatial_mv_pred_flag;

  guint8 num_ref_idx_l0_active_minus1;
  guint8 num_ref_idx_l1_active_minus1;

  GstH264PredWeightTable pred_weight_table;
  /* if nal_unit.ref_idc != 0 */
  GstH264DecRefPicMarking dec_ref_pic_marking;

550 551 552 553 554 555 556 557 558 559
  guint8 cabac_init_idc;
  gint8 slice_qp_delta;
  gint8 slice_qs_delta;

  guint8 disable_deblocking_filter_idc;
  gint8 slice_alpha_c0_offset_div2;
  gint8 slice_beta_offset_div2;

  guint16 slice_group_change_cycle;

560 561 562
  /* calculated values */
  guint32 max_pic_num;
  gboolean valid;
563 564 565

  /* Size of the slice_header() in bits */
  guint header_size;
566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671
};


struct _GstH264ClockTimestamp
{
  guint8 ct_type;
  guint8 nuit_field_based_flag;
  guint8 counting_type;
  guint8 discontinuity_flag;
  guint8 cnt_dropped_flag;
  guint8 n_frames;

  guint8 seconds_flag;
  guint8 seconds_value;

  guint8 minutes_flag;
  guint8 minutes_value;

  guint8 hours_flag;
  guint8 hours_value;

  guint32 time_offset;
};

struct _GstH264PicTiming
{
  guint32 cpb_removal_delay;
  guint32 dpb_output_delay;

  guint8 pic_struct_present_flag;
  /* if pic_struct_present_flag */
  guint8 pic_struct;

  guint8 clock_timestamp_flag[3];
  GstH264ClockTimestamp clock_timestamp[3];
};

struct _GstH264BufferingPeriod
{
  GstH264SPS *sps;

  /* seq->vui_parameters->nal_hrd_parameters_present_flag */
  guint8 nal_initial_cpb_removal_delay[32];
  guint8 nal_initial_cpb_removal_delay_offset[32];

  /* seq->vui_parameters->vcl_hrd_parameters_present_flag */
  guint8 vcl_initial_cpb_removal_delay[32];
  guint8 vcl_initial_cpb_removal_delay_offset[32];
};

struct _GstH264SEIMessage
{
  GstH264SEIPayloadType payloadType;

  union {
    GstH264BufferingPeriod buffering_period;
    GstH264PicTiming pic_timing;
    /* ... could implement more */
  };
};

/* Opaque structure */
struct _GstH264NalParser
{
  GstH264SPS sps[GST_H264_MAX_SPS_COUNT];
  GstH264PPS pps[GST_H264_MAX_PPS_COUNT];
  GstH264SPS *last_sps;
  GstH264PPS *last_pps;
};

GstH264NalParser *gst_h264_nal_parser_new             (void);

GstH264ParserResult gst_h264_parser_identify_nalu     (GstH264NalParser *nalparser,
                                                       const guint8 *data, guint offset,
                                                       gsize size, GstH264NalUnit *nalu);

GstH264ParserResult gst_h264_parser_identify_nalu_avc (GstH264NalParser *nalparser, const guint8 *data,
                                                       guint offset, gsize size, guint8 nal_length_size,
                                                       GstH264NalUnit *nalu);

GstH264ParserResult gst_h264_parser_parse_nal         (GstH264NalParser *nalparser,
                                                       GstH264NalUnit *nalu);

GstH264ParserResult gst_h264_parser_parse_slice_hdr   (GstH264NalParser *nalparser, GstH264NalUnit *nalu,
                                                       GstH264SliceHdr *slice, gboolean parse_pred_weight_table,
                                                       gboolean parse_dec_ref_pic_marking);

GstH264ParserResult gst_h264_parser_parse_sps         (GstH264NalParser *nalparser, GstH264NalUnit *nalu,
                                                       GstH264SPS *sps, gboolean parse_vui_params);

GstH264ParserResult gst_h264_parser_parse_pps         (GstH264NalParser *nalparser,
                                                       GstH264NalUnit *nalu, GstH264PPS *pps);

GstH264ParserResult gst_h264_parser_parse_sei         (GstH264NalParser *nalparser,
                                                       GstH264NalUnit *nalu, GstH264SEIMessage *sei);

void gst_h264_nal_parser_free                         (GstH264NalParser *nalparser);

GstH264ParserResult gst_h264_parse_sps                (GstH264NalUnit *nalu,
                                                       GstH264SPS *sps, gboolean parse_vui_params);

GstH264ParserResult gst_h264_parse_pps                (GstH264NalParser *nalparser,
                                                       GstH264NalUnit *nalu, GstH264PPS *pps);

G_END_DECLS
#endif