1 /* Gstreamer 2 * Copyright (C) <2011> Intel Corporation 3 * Copyright (C) <2011> Collabora Ltd. 4 * Copyright (C) <2011> Thibault Saunier <thibault.saunier@collabora.com> 5 * 6 * From bad/sys/vdpau/mpeg/mpegutil.c: 7 * Copyright (C) <2007> Jan Schmidt <thaytan@mad.scientist.com> 8 * Copyright (C) <2009> Carl-Anton Ingmarsson <ca.ingmarsson@gmail.com> 9 * 10 * This library is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU Library General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This library is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * Library General Public License for more details. 19 * 20 * You should have received a copy of the GNU Library General Public 21 * License along with this library; if not, write to the 22 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 23 * Boston, MA 02110-1301, USA. 24 */ 25 26 #ifndef __GST_MPEG_VIDEO_UTILS_H__ 27 #define __GST_MPEG_VIDEO_UTILS_H__ 28 29 #ifndef OHOS_EXT_FUNC 30 // ohos.ext.func.0013 31 #ifndef GST_USE_UNSTABLE_API 32 #warning "The Mpeg video parsing library is unstable API and may change in future." 33 #warning "You can define GST_USE_UNSTABLE_API to avoid this warning." 34 #endif 35 #endif 36 37 #include <gst/gst.h> 38 #include <gst/codecparsers/codecparsers-prelude.h> 39 40 G_BEGIN_DECLS 41 42 /** 43 * GstMpegVideoPacketTypeCode: 44 * @GST_MPEG_VIDEO_PACKET_PICTURE: Picture packet starting code 45 * @GST_MPEG_VIDEO_PACKET_SLICE_MIN: Slice min packet starting code 46 * @GST_MPEG_VIDEO_PACKET_SLICE_MAX: Slice max packet starting code 47 * @GST_MPEG_VIDEO_PACKET_USER_DATA: User data packet starting code 48 * @GST_MPEG_VIDEO_PACKET_SEQUENCE : Sequence packet starting code 49 * @GST_MPEG_VIDEO_PACKET_EXTENSION: Extension packet starting code 50 * @GST_MPEG_VIDEO_PACKET_SEQUENCE_END: Sequence end packet code 51 * @GST_MPEG_VIDEO_PACKET_GOP: Group of Picture packet starting code 52 * @GST_MPEG_VIDEO_PACKET_NONE: None packet code 53 * 54 * Indicates the type of MPEG packet 55 */ 56 typedef enum { 57 GST_MPEG_VIDEO_PACKET_PICTURE = 0x00, 58 GST_MPEG_VIDEO_PACKET_SLICE_MIN = 0x01, 59 GST_MPEG_VIDEO_PACKET_SLICE_MAX = 0xaf, 60 GST_MPEG_VIDEO_PACKET_USER_DATA = 0xb2, 61 GST_MPEG_VIDEO_PACKET_SEQUENCE = 0xb3, 62 GST_MPEG_VIDEO_PACKET_EXTENSION = 0xb5, 63 GST_MPEG_VIDEO_PACKET_SEQUENCE_END = 0xb7, 64 GST_MPEG_VIDEO_PACKET_GOP = 0xb8, 65 GST_MPEG_VIDEO_PACKET_NONE = 0xff 66 } GstMpegVideoPacketTypeCode; 67 68 /** 69 * GST_MPEG_VIDEO_PACKET_IS_SLICE: 70 * @typecode: The MPEG video packet type code 71 * 72 * Checks whether a packet type code is a slice. 73 * 74 * Returns: %TRUE if the packet type code corresponds to a slice, 75 * else %FALSE. 76 */ 77 #define GST_MPEG_VIDEO_PACKET_IS_SLICE(typecode) ((typecode) >= GST_MPEG_VIDEO_PACKET_SLICE_MIN && \ 78 (typecode) <= GST_MPEG_VIDEO_PACKET_SLICE_MAX) 79 80 /** 81 * GstMpegVideoPacketExtensionCode: 82 * @GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE: Sequence extension code 83 * @GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE_DISPLAY: Sequence Display extension code 84 * @GST_MPEG_VIDEO_PACKET_EXT_QUANT_MATRIX: Quantization Matrix extension code 85 * @GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE_SCALABLE: Sequence Scalable extension code 86 * @GST_MPEG_VIDEO_PACKET_EXT_PICTURE: Picture coding extension 87 * 88 * Indicates what type of packets are in this block, some are mutually 89 * exclusive though - ie, sequence packs are accumulated separately. GOP & 90 * Picture may occur together or separately. 91 */ 92 typedef enum { 93 GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE = 0x01, 94 GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE_DISPLAY = 0x02, 95 GST_MPEG_VIDEO_PACKET_EXT_QUANT_MATRIX = 0x03, 96 GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE_SCALABLE = 0x05, 97 GST_MPEG_VIDEO_PACKET_EXT_PICTURE = 0x08 98 } GstMpegVideoPacketExtensionCode; 99 100 /** 101 * GstMpegVideoSequenceScalableMode: 102 * @GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_DATA_PARTITIONING: Data partitioning 103 * @GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_SPATIAL: Spatial Scalability 104 * @GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_SNR: SNR Scalability 105 * @GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_TEMPORAL: Temporal Scalability 106 */ 107 typedef enum { 108 GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_DATA_PARTITIONING = 0x00, 109 GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_SPATIAL = 0x01, 110 GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_SNR = 0x02, 111 GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_TEMPORAL = 0x03 112 } GstMpegVideoSequenceScalableMode; 113 114 /** 115 * GstMpegVideoLevel: 116 * @GST_MPEG_VIDEO_LEVEL_LOW: Low level (LL) 117 * @GST_MPEG_VIDEO_LEVEL_MAIN: Main level (ML) 118 * @GST_MPEG_VIDEO_LEVEL_HIGH_1440: High 1440 level (H-14) 119 * @GST_MPEG_VIDEO_LEVEL_HIGH: High level (HL) 120 * 121 * Mpeg-2 Levels. 122 **/ 123 typedef enum { 124 GST_MPEG_VIDEO_LEVEL_HIGH = 0x04, 125 GST_MPEG_VIDEO_LEVEL_HIGH_1440 = 0x06, 126 GST_MPEG_VIDEO_LEVEL_MAIN = 0x08, 127 GST_MPEG_VIDEO_LEVEL_LOW = 0x0a 128 } GstMpegVideoLevel; 129 130 /** 131 * GstMpegVideoProfile: 132 * @GST_MPEG_VIDEO_PROFILE_422: 4:2:2 profile (422) 133 * @GST_MPEG_VIDEO_PROFILE_HIGH: High profile (HP) 134 * @GST_MPEG_VIDEO_PROFILE_SPATIALLY_SCALABLE: Spatially Scalable profile (Spatial) 135 * @GST_MPEG_VIDEO_PROFILE_SNR_SCALABLE: SNR Scalable profile (SNR) 136 * @GST_MPEG_VIDEO_PROFILE_MAIN: Main profile (MP) 137 * @GST_MPEG_VIDEO_PROFILE_SIMPLE: Simple profile (SP) 138 * 139 * Mpeg-2 Profiles. 140 **/ 141 typedef enum { 142 GST_MPEG_VIDEO_PROFILE_422 = 0x00, 143 GST_MPEG_VIDEO_PROFILE_HIGH = 0x01, 144 GST_MPEG_VIDEO_PROFILE_SPATIALLY_SCALABLE = 0x02, 145 GST_MPEG_VIDEO_PROFILE_SNR_SCALABLE = 0x03, 146 GST_MPEG_VIDEO_PROFILE_MAIN = 0x04, 147 GST_MPEG_VIDEO_PROFILE_SIMPLE = 0x05 148 } GstMpegVideoProfile; 149 150 /** 151 * GstMpegVideoChromaFormat: 152 * @GST_MPEG_VIDEO_CHROMA_RES: Invalid (reserved for future use) 153 * @GST_MPEG_VIDEO_CHROMA_420: 4:2:0 subsampling 154 * @GST_MPEG_VIDEO_CHROMA_422: 4:2:2 subsampling 155 * @GST_MPEG_VIDEO_CHROMA_444: 4:4:4 (non-subsampled) 156 * 157 * Chroma subsampling type. 158 */ 159 typedef enum { 160 GST_MPEG_VIDEO_CHROMA_RES = 0x00, 161 GST_MPEG_VIDEO_CHROMA_420 = 0x01, 162 GST_MPEG_VIDEO_CHROMA_422 = 0x02, 163 GST_MPEG_VIDEO_CHROMA_444 = 0x03, 164 } GstMpegVideoChromaFormat; 165 166 /** 167 * GstMpegVideoPictureType: 168 * @GST_MPEG_VIDEO_PICTURE_TYPE_I: Intra-coded (I) frame 169 * @GST_MPEG_VIDEO_PICTURE_TYPE_P: Predictive-codec (P) frame 170 * @GST_MPEG_VIDEO_PICTURE_TYPE_B: Bidirectionally predictive-coded (B) frame 171 * @GST_MPEG_VIDEO_PICTURE_TYPE_D: D frame 172 * 173 * Picture type. 174 */ 175 typedef enum { 176 GST_MPEG_VIDEO_PICTURE_TYPE_I = 0x01, 177 GST_MPEG_VIDEO_PICTURE_TYPE_P = 0x02, 178 GST_MPEG_VIDEO_PICTURE_TYPE_B = 0x03, 179 GST_MPEG_VIDEO_PICTURE_TYPE_D = 0x04 180 } GstMpegVideoPictureType; 181 182 /** 183 * GstMpegVideoPictureStructure: 184 * @GST_MPEG_VIDEO_PICTURE_STRUCTURE_TOP_FIELD: Top field 185 * @GST_MPEG_VIDEO_PICTURE_STRUCTURE_BOTTOM_FIELD: Bottom field 186 * @GST_MPEG_VIDEO_PICTURE_STRUCTURE_FRAME: Frame picture 187 * 188 * Picture structure type. 189 */ 190 typedef enum { 191 GST_MPEG_VIDEO_PICTURE_STRUCTURE_TOP_FIELD = 0x01, 192 GST_MPEG_VIDEO_PICTURE_STRUCTURE_BOTTOM_FIELD = 0x02, 193 GST_MPEG_VIDEO_PICTURE_STRUCTURE_FRAME = 0x03 194 } GstMpegVideoPictureStructure; 195 196 typedef struct _GstMpegVideoSequenceHdr GstMpegVideoSequenceHdr; 197 typedef struct _GstMpegVideoSequenceExt GstMpegVideoSequenceExt; 198 typedef struct _GstMpegVideoSequenceDisplayExt GstMpegVideoSequenceDisplayExt; 199 typedef struct _GstMpegVideoSequenceScalableExt GstMpegVideoSequenceScalableExt; 200 typedef struct _GstMpegVideoPictureHdr GstMpegVideoPictureHdr; 201 typedef struct _GstMpegVideoGop GstMpegVideoGop; 202 typedef struct _GstMpegVideoPictureExt GstMpegVideoPictureExt; 203 typedef struct _GstMpegVideoQuantMatrixExt GstMpegVideoQuantMatrixExt; 204 typedef struct _GstMpegVideoSliceHdr GstMpegVideoSliceHdr; 205 typedef struct _GstMpegVideoPacket GstMpegVideoPacket; 206 207 /** 208 * GstMpegVideoSequenceHdr: 209 * @width: Width of each frame 210 * @height: Height of each frame 211 * @par_w: Calculated Pixel Aspect Ratio width 212 * @par_h: Calculated Pixel Aspect Ratio height 213 * @fps_n: Calculated Framrate nominator 214 * @fps_d: Calculated Framerate denominator 215 * @bitrate_value: Value of the bitrate as is in the stream (400bps unit) 216 * @bitrate: the real bitrate of the Mpeg video stream in bits per second, 0 if VBR stream 217 * @constrained_parameters_flag: %TRUE if this stream uses contrained parameters. 218 * @load_intra_quantiser_matrix: %TRUE indicates the presence of intra_quantiser_matrix 219 * @intra_quantizer_matrix: intra-quantization table, in zigzag scan order 220 * @load_non_intra_quantiser_matrix: %TRUE indicates the presence of non_intra_quantiser_matrix 221 * @non_intra_quantizer_matrix: non-intra quantization table, in zigzag scan order 222 * 223 * The Mpeg2 Video Sequence Header structure. 224 */ 225 struct _GstMpegVideoSequenceHdr 226 { 227 guint16 width, height; 228 guint8 aspect_ratio_info; 229 guint8 frame_rate_code; 230 guint32 bitrate_value; 231 guint16 vbv_buffer_size_value; 232 233 guint8 constrained_parameters_flag; 234 235 guint8 load_intra_quantiser_matrix; 236 guint8 intra_quantizer_matrix[64]; 237 guint8 load_non_intra_quantiser_matrix; 238 guint8 non_intra_quantizer_matrix[64]; 239 240 /* Calculated values */ 241 guint par_w, par_h; 242 guint fps_n, fps_d; 243 guint bitrate; 244 }; 245 246 /** 247 * GstMpegVideoSequenceExt: 248 * @profile: mpeg2 decoder profile 249 * @level: mpeg2 decoder level 250 * @progressive: %TRUE if the frames are progressive %FALSE otherwise 251 * @chroma_format: indicates the chrominance format 252 * @horiz_size_ext: Horizontal size 253 * @vert_size_ext: Vertical size 254 * @bitrate_ext: The bitrate 255 * @vbv_buffer_size_extension: VBV vuffer size 256 * @low_delay: %TRUE if the sequence doesn't contain any B-pictures, %FALSE 257 * otherwise 258 * @fps_n_ext: Framerate nominator code 259 * @fps_d_ext: Framerate denominator code 260 * @profile_level_escape_bit: Escape bit. If set, the meaning of the 261 * @profile and @level fields is different. 262 * 263 * The Mpeg2 Video Sequence Extension structure. 264 **/ 265 struct _GstMpegVideoSequenceExt 266 { 267 /* mpeg2 decoder profile */ 268 guint8 profile; 269 /* mpeg2 decoder level */ 270 guint8 level; 271 272 guint8 progressive; 273 guint8 chroma_format; 274 275 guint8 horiz_size_ext, vert_size_ext; 276 277 guint16 bitrate_ext; 278 guint8 vbv_buffer_size_extension; 279 guint8 low_delay; 280 guint8 fps_n_ext, fps_d_ext; 281 282 /* Additional information */ 283 guint8 profile_level_escape_bit; 284 }; 285 286 /** 287 * GstMpegVideoSequenceDisplayExt: 288 * @profile: mpeg2 decoder profil 289 290 */ 291 struct _GstMpegVideoSequenceDisplayExt 292 { 293 guint8 video_format; 294 guint8 colour_description_flag; 295 296 /* if colour_description_flag: */ 297 guint8 colour_primaries; 298 guint8 transfer_characteristics; 299 guint8 matrix_coefficients; 300 301 guint16 display_horizontal_size; 302 guint16 display_vertical_size; 303 }; 304 305 /** 306 * GstMpegVideoSequenceScalableExt: 307 * @scalable_mode: 308 * @layer_id: 309 * @lower_layer_prediction_horizontal_size: 310 * @lower_layer_prediction_vertical_size: 311 * @horizontal_subsampling_factor_m: 312 * @horizontal_subsampling_factor_n: 313 * @vertical_subsampling_factor_m: 314 * @vertical_subsampling_factor_n: 315 * @picture_mux_enable: 316 * @mux_to_progressive_sequence: 317 * @picture_mux_order: 318 * @picture_mux_factor: 319 * 320 * The Sequence Scalable Extension structure. 321 * 322 * Since: 1.2 323 */ 324 struct _GstMpegVideoSequenceScalableExt 325 { 326 guint8 scalable_mode; 327 guint8 layer_id; 328 329 /* if spatial scalability */ 330 guint16 lower_layer_prediction_horizontal_size; 331 guint16 lower_layer_prediction_vertical_size; 332 guint8 horizontal_subsampling_factor_m; 333 guint8 horizontal_subsampling_factor_n; 334 guint8 vertical_subsampling_factor_m; 335 guint8 vertical_subsampling_factor_n; 336 337 /* if temporal scalability */ 338 guint8 picture_mux_enable; 339 guint8 mux_to_progressive_sequence; 340 guint8 picture_mux_order; 341 guint8 picture_mux_factor; 342 }; 343 344 /** 345 * GstMpegVideoQuantMatrixExt: 346 * @load_intra_quantiser_matrix: 347 * @intra_quantiser_matrix: 348 * @load_non_intra_quantiser_matrix: 349 * @non_intra_quantiser_matrix: 350 * @load_chroma_intra_quantiser_matrix: 351 * @chroma_intra_quantiser_matrix: 352 * @load_chroma_non_intra_quantiser_matrix: 353 * @chroma_non_intra_quantiser_matrix: 354 * 355 * The Quant Matrix Extension structure that exposes quantization 356 * matrices in zigzag scan order. i.e. the original encoded scan 357 * order. 358 */ 359 struct _GstMpegVideoQuantMatrixExt 360 { 361 guint8 load_intra_quantiser_matrix; 362 guint8 intra_quantiser_matrix[64]; 363 guint8 load_non_intra_quantiser_matrix; 364 guint8 non_intra_quantiser_matrix[64]; 365 guint8 load_chroma_intra_quantiser_matrix; 366 guint8 chroma_intra_quantiser_matrix[64]; 367 guint8 load_chroma_non_intra_quantiser_matrix; 368 guint8 chroma_non_intra_quantiser_matrix[64]; 369 }; 370 371 /** 372 * GstMpegVideoPictureHdr: 373 * @tsn: Temporal Sequence Number 374 * @pic_type: Type of the frame 375 * @full_pel_forward_vector: the full pel forward flag of 376 * the frame: 0 or 1. 377 * @full_pel_backward_vector: the full pel backward flag 378 * of the frame: 0 or 1. 379 * @f_code: F code 380 * 381 * The Mpeg2 Video Picture Header structure. 382 */ 383 struct _GstMpegVideoPictureHdr 384 { 385 guint16 tsn; 386 guint8 pic_type; 387 guint16 vbv_delay; 388 389 guint8 full_pel_forward_vector, full_pel_backward_vector; 390 391 guint8 f_code[2][2]; 392 }; 393 394 /** 395 * GstMpegVideoPictureExt: 396 * @intra_dc_precision: Intra DC precision 397 * @picture_structure: Structure of the picture 398 * @top_field_first: Top field first 399 * @frame_pred_frame_dct: Frame 400 * @concealment_motion_vectors: Concealment Motion Vectors 401 * @q_scale_type: Q Scale Type 402 * @intra_vlc_format: Intra Vlc Format 403 * @alternate_scan: Alternate Scan 404 * @repeat_first_field: Repeat First Field 405 * @chroma_420_type: Chroma 420 Type 406 * @progressive_frame: %TRUE if the frame is progressive %FALSE otherwise 407 * 408 * The Mpeg2 Video Picture Extension structure. 409 */ 410 struct _GstMpegVideoPictureExt 411 { 412 guint8 f_code[2][2]; 413 414 guint8 intra_dc_precision; 415 guint8 picture_structure; 416 guint8 top_field_first; 417 guint8 frame_pred_frame_dct; 418 guint8 concealment_motion_vectors; 419 guint8 q_scale_type; 420 guint8 intra_vlc_format; 421 guint8 alternate_scan; 422 guint8 repeat_first_field; 423 guint8 chroma_420_type; 424 guint8 progressive_frame; 425 guint8 composite_display; 426 guint8 v_axis; 427 guint8 field_sequence; 428 guint8 sub_carrier; 429 guint8 burst_amplitude; 430 guint8 sub_carrier_phase; 431 }; 432 433 /** 434 * GstMpegVideoGop: 435 * @drop_frame_flag: Drop Frame Flag 436 * @hour: Hour (0-23) 437 * @minute: Minute (O-59) 438 * @second: Second (0-59) 439 * @frame: Frame (0-59) 440 * @closed_gop: Closed Gop 441 * @broken_link: Broken link 442 * 443 * The Mpeg Video Group of Picture structure. 444 */ 445 struct _GstMpegVideoGop 446 { 447 guint8 drop_frame_flag; 448 449 guint8 hour, minute, second, frame; 450 451 guint8 closed_gop; 452 guint8 broken_link; 453 }; 454 455 /** 456 * GstMpegVideoSliceHdr: 457 * @vertical_position: slice vertical position 458 * @vertical_position_extension: Extension to slice_vertical_position 459 * @priority_breakpoint: Point where the bitstream shall be partitioned 460 * @quantiser_scale_code: Quantiser value (range: 1-31) 461 * @slice_ext_flag: Slice Extension flag 462 * @intra_slice: Equal to one if all the macroblocks are intra macro blocks. 463 * @slice_picture_id_enable: controls the semantics of slice_picture_id 464 * @slice_picture_id: Intended to aid recovery on severe bursts of 465 * errors for certain types of applications 466 * 467 * The Mpeg2 Video Slice Header structure. 468 * 469 * Since: 1.2 470 */ 471 struct _GstMpegVideoSliceHdr 472 { 473 guint8 vertical_position; 474 guint8 vertical_position_ext; 475 476 guint8 priority_breakpoint; 477 guint8 quantiser_scale_code; 478 guint8 slice_ext_flag; 479 guint8 intra_slice; 480 guint8 slice_picture_id_enable; 481 guint8 slice_picture_id; 482 483 /* Calculated values */ 484 guint header_size; /* slice_header size in bits */ 485 gint mb_row; /* macroblock row */ 486 gint mb_column; /* macroblock column */ 487 }; 488 489 /** 490 * GstMpegVideoPacket: 491 * @type: the type of the packet that start at @offset, as a #GstMpegVideoPacketTypeCode 492 * @data: the data containing the packet starting at @offset 493 * @offset: the offset of the packet start in bytes from @data. This is the 494 * start of the packet itself without the sync code 495 * @size: The size in bytes of the packet or -1 if the end wasn't found. This 496 * is the size of the packet itself without the sync code 497 * 498 * A structure that contains the type of a packet, its offset and its size 499 */ 500 struct _GstMpegVideoPacket 501 { 502 const guint8 *data; 503 guint8 type; 504 guint offset; 505 gint size; 506 }; 507 508 GST_CODEC_PARSERS_API 509 gboolean gst_mpeg_video_parse (GstMpegVideoPacket * packet, 510 const guint8 * data, gsize size, guint offset); 511 512 GST_CODEC_PARSERS_API 513 gboolean gst_mpeg_video_packet_parse_sequence_header (const GstMpegVideoPacket * packet, 514 GstMpegVideoSequenceHdr * seqhdr); 515 516 GST_CODEC_PARSERS_API 517 gboolean gst_mpeg_video_packet_parse_sequence_extension (const GstMpegVideoPacket * packet, 518 GstMpegVideoSequenceExt * seqext); 519 520 GST_CODEC_PARSERS_API 521 gboolean gst_mpeg_video_packet_parse_sequence_display_extension (const GstMpegVideoPacket * packet, 522 GstMpegVideoSequenceDisplayExt * seqdisplayext); 523 524 GST_CODEC_PARSERS_API 525 gboolean gst_mpeg_video_packet_parse_sequence_scalable_extension (const GstMpegVideoPacket * packet, 526 GstMpegVideoSequenceScalableExt * seqscaleext); 527 528 GST_CODEC_PARSERS_API 529 gboolean gst_mpeg_video_packet_parse_picture_header (const GstMpegVideoPacket * packet, 530 GstMpegVideoPictureHdr* pichdr); 531 532 GST_CODEC_PARSERS_API 533 gboolean gst_mpeg_video_packet_parse_picture_extension (const GstMpegVideoPacket * packet, 534 GstMpegVideoPictureExt *picext); 535 536 GST_CODEC_PARSERS_API 537 gboolean gst_mpeg_video_packet_parse_gop (const GstMpegVideoPacket * packet, 538 GstMpegVideoGop * gop); 539 540 GST_CODEC_PARSERS_API 541 gboolean gst_mpeg_video_packet_parse_slice_header (const GstMpegVideoPacket * packet, 542 GstMpegVideoSliceHdr * slice_hdr, 543 GstMpegVideoSequenceHdr * seq_hdr, 544 GstMpegVideoSequenceScalableExt * seqscaleext); 545 546 GST_CODEC_PARSERS_API 547 gboolean gst_mpeg_video_packet_parse_quant_matrix_extension (const GstMpegVideoPacket * packet, 548 GstMpegVideoQuantMatrixExt * quant); 549 550 /* seqext and displayext may be NULL if not received */ 551 552 GST_CODEC_PARSERS_API 553 gboolean gst_mpeg_video_finalise_mpeg2_sequence_header (GstMpegVideoSequenceHdr *hdr, 554 GstMpegVideoSequenceExt *seqext, GstMpegVideoSequenceDisplayExt *displayext); 555 556 GST_CODEC_PARSERS_API 557 void gst_mpeg_video_quant_matrix_get_raster_from_zigzag (guint8 out_quant[64], 558 const guint8 quant[64]); 559 560 GST_CODEC_PARSERS_API 561 void gst_mpeg_video_quant_matrix_get_zigzag_from_raster (guint8 out_quant[64], 562 const guint8 quant[64]); 563 564 G_END_DECLS 565 566 #endif 567