1 /* 2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #ifndef AOM_AV1_ENCODER_RATECTRL_H_ 13 #define AOM_AV1_ENCODER_RATECTRL_H_ 14 15 #include "aom/aom_codec.h" 16 #include "aom/aom_integer.h" 17 18 #include "aom_ports/mem.h" 19 20 #include "av1/common/av1_common_int.h" 21 #include "av1/common/blockd.h" 22 23 #ifdef __cplusplus 24 extern "C" { 25 #endif 26 27 /*!\cond */ 28 29 // Bits Per MB at different Q (Multiplied by 512) 30 #define BPER_MB_NORMBITS 9 31 32 // Use this macro to turn on/off use of alt-refs in one-pass mode. 33 #define USE_ALTREF_FOR_ONE_PASS 1 34 35 // Threshold used to define if a KF group is static (e.g. a slide show). 36 // Essentially, this means that no frame in the group has more than 1% of MBs 37 // that are not marked as coded with 0,0 motion in the first pass. 38 #define STATIC_KF_GROUP_THRESH 99 39 #define STATIC_KF_GROUP_FLOAT_THRESH 0.99 40 41 // The maximum duration of a GF group that is static (e.g. a slide show). 42 #define MAX_STATIC_GF_GROUP_LENGTH 250 43 44 #define MIN_GF_INTERVAL 4 45 #define MAX_GF_INTERVAL 32 46 #define FIXED_GF_INTERVAL 16 47 #define MAX_GF_LENGTH_LAP 16 48 49 #define FIXED_GF_INTERVAL_RT 80 50 #define MAX_GF_INTERVAL_RT 160 51 52 #define MAX_NUM_GF_INTERVALS 15 53 54 #define MAX_ARF_LAYERS 6 55 // #define STRICT_RC 56 57 #define DEFAULT_KF_BOOST_RT 2300 58 #define DEFAULT_GF_BOOST_RT 2000 59 60 // A passive rate control strategy for screen content type in real-time mode. 61 // When it is turned on, the compression performance is improved by 62 // 7.8% (overall_psnr), 5.0% (VMAF) on average. Some clips see gains 63 // over 20% on metric. 64 // The downside is that it does not guarantee frame size. 65 // Since RT mode has a tight restriction on buffer overflow control, we 66 // turn it off by default. 67 #define RT_PASSIVE_STRATEGY 0 68 #define MAX_Q_HISTORY 1000 69 70 typedef struct { 71 int resize_width; 72 int resize_height; 73 uint8_t superres_denom; 74 } size_params_type; 75 76 enum { 77 INTER_NORMAL, 78 GF_ARF_LOW, 79 GF_ARF_STD, 80 KF_STD, 81 RATE_FACTOR_LEVELS 82 } UENUM1BYTE(RATE_FACTOR_LEVEL); 83 84 enum { 85 KF_UPDATE, 86 LF_UPDATE, 87 GF_UPDATE, 88 ARF_UPDATE, 89 OVERLAY_UPDATE, 90 INTNL_OVERLAY_UPDATE, // Internal Overlay Frame 91 INTNL_ARF_UPDATE, // Internal Altref Frame 92 FRAME_UPDATE_TYPES 93 } UENUM1BYTE(FRAME_UPDATE_TYPE); 94 95 enum { 96 REFBUF_RESET, // Clear reference frame buffer 97 REFBUF_UPDATE, // Refresh reference frame buffer 98 REFBUF_STATES 99 } UENUM1BYTE(REFBUF_STATE); 100 101 typedef enum { 102 NO_RESIZE = 0, 103 DOWN_THREEFOUR = 1, // From orig to 3/4. 104 DOWN_ONEHALF = 2, // From orig or 3/4 to 1/2. 105 UP_THREEFOUR = -1, // From 1/2 to 3/4. 106 UP_ORIG = -2, // From 1/2 or 3/4 to orig. 107 } RESIZE_ACTION; 108 109 typedef enum { ORIG = 0, THREE_QUARTER = 1, ONE_HALF = 2 } RESIZE_STATE; 110 111 #define MAX_FIRSTPASS_ANALYSIS_FRAMES 150 112 typedef enum region_types { 113 STABLE_REGION = 0, 114 HIGH_VAR_REGION = 1, 115 SCENECUT_REGION = 2, 116 BLENDING_REGION = 3, 117 } REGION_TYPES; 118 119 typedef struct regions { 120 int start; 121 int last; 122 double avg_noise_var; 123 double avg_cor_coeff; 124 double avg_sr_fr_ratio; 125 double avg_intra_err; 126 double avg_coded_err; 127 REGION_TYPES type; 128 } REGIONS; 129 130 /*!\endcond */ 131 /*! 132 * \brief Rate Control parameters and status 133 */ 134 typedef struct { 135 // Rate targetting variables 136 137 /*! 138 * Baseline target rate for frame before adjustment for previous under or 139 * over shoot. 140 */ 141 int base_frame_target; 142 /*! 143 * Target rate for frame after adjustment for previous under or over shoot. 144 */ 145 int this_frame_target; // Actual frame target after rc adjustment. 146 147 /*! 148 * Projected size for current frame 149 */ 150 int projected_frame_size; 151 152 /*! 153 * Bit size of transform coefficient for current frame. 154 */ 155 int coefficient_size; 156 157 /*! 158 * Super block rate target used with some adaptive quantization strategies. 159 */ 160 int sb64_target_rate; 161 162 /*! 163 * Number of frames since the last ARF / GF. 164 */ 165 int frames_since_golden; 166 167 /*! 168 * Number of frames till the next ARF / GF is due. 169 */ 170 int frames_till_gf_update_due; 171 172 /*! 173 * Number of determined gf groups left 174 */ 175 int intervals_till_gf_calculate_due; 176 177 /*!\cond */ 178 int min_gf_interval; 179 int max_gf_interval; 180 int static_scene_max_gf_interval; 181 /*!\endcond */ 182 /*! 183 * Frames before the next key frame 184 */ 185 int frames_to_key; 186 /*!\cond */ 187 int frames_since_key; 188 int frames_to_fwd_kf; 189 int is_src_frame_alt_ref; 190 int sframe_due; 191 192 int high_source_sad; 193 uint64_t avg_source_sad; 194 uint64_t prev_avg_source_sad; 195 uint64_t frame_source_sad; 196 197 int avg_frame_bandwidth; // Average frame size target for clip 198 int min_frame_bandwidth; // Minimum allocation used for any frame 199 int max_frame_bandwidth; // Maximum burst rate allowed for a frame. 200 int prev_avg_frame_bandwidth; 201 202 int ni_av_qi; 203 int ni_tot_qi; 204 205 int decimation_factor; 206 int decimation_count; 207 208 /*!\endcond */ 209 /*! 210 * User specified maximum Q allowed for current frame 211 */ 212 int worst_quality; 213 /*! 214 * User specified minimum Q allowed for current frame 215 */ 216 int best_quality; 217 218 /*!\cond */ 219 220 // rate control history for last frame(1) and the frame before(2). 221 // -1: overshoot 222 // 1: undershoot 223 // 0: not initialized. 224 int rc_1_frame; 225 int rc_2_frame; 226 int q_1_frame; 227 int q_2_frame; 228 229 /*!\endcond */ 230 /*! 231 * Proposed maximum allowed Q for current frame 232 */ 233 int active_worst_quality; 234 235 /*!\cond */ 236 // Track amount of low motion in scene 237 int avg_frame_low_motion; 238 int cnt_zeromv; 239 240 // signals if number of blocks with motion is high 241 int percent_blocks_with_motion; 242 243 // Maximum value of source sad across all blocks of frame. 244 uint64_t max_block_source_sad; 245 246 // For dynamic resize, 1 pass cbr. 247 RESIZE_STATE resize_state; 248 int resize_avg_qp; 249 int resize_buffer_underflow; 250 int resize_count; 251 252 // Flag to disable content related qp adjustment. 253 int rtc_external_ratectrl; 254 255 // Stores fast_extra_bits of the current frame. 256 int frame_level_fast_extra_bits; 257 258 double frame_level_rate_correction_factors[RATE_FACTOR_LEVELS]; 259 260 int frame_num_last_gf_refresh; 261 262 int prev_coded_width; 263 int prev_coded_height; 264 /*!\endcond */ 265 } RATE_CONTROL; 266 267 /*! 268 * \brief Primary Rate Control parameters and status 269 */ 270 typedef struct { 271 // Sub-gop level Rate targetting variables 272 273 /*! 274 * Target bit budget for the current GF / ARF group of frame. 275 */ 276 int64_t gf_group_bits; 277 278 /*! 279 * Boost factor used to calculate the extra bits allocated to the key frame 280 */ 281 int kf_boost; 282 283 /*! 284 * Boost factor used to calculate the extra bits allocated to ARFs and GFs 285 */ 286 int gfu_boost; 287 288 /*! 289 * Stores the determined gf group lengths for a set of gf groups 290 */ 291 int gf_intervals[MAX_NUM_GF_INTERVALS]; 292 293 /*! 294 * The current group's index into gf_intervals[] 295 */ 296 int cur_gf_index; 297 298 /*!\cond */ 299 int num_regions; 300 301 REGIONS regions[MAX_FIRSTPASS_ANALYSIS_FRAMES]; 302 int regions_offset; // offset of regions from the last keyframe 303 int frames_till_regions_update; 304 305 int baseline_gf_interval; 306 307 int constrained_gf_group; 308 309 int this_key_frame_forced; 310 311 int next_key_frame_forced; 312 /*!\endcond */ 313 314 /*! 315 * Initial buffuer level in ms for CBR / low delay encoding 316 */ 317 int64_t starting_buffer_level; 318 319 /*! 320 * Optimum / target buffuer level in ms for CBR / low delay encoding 321 */ 322 int64_t optimal_buffer_level; 323 324 /*! 325 * Maximum target buffuer level in ms for CBR / low delay encoding 326 */ 327 int64_t maximum_buffer_size; 328 329 /*! 330 * Q index used for ALT frame 331 */ 332 int arf_q; 333 334 /*!\cond */ 335 float_t arf_boost_factor; 336 337 int base_layer_qp; 338 339 // Total number of stats used only for kf_boost calculation. 340 int num_stats_used_for_kf_boost; 341 342 // Total number of stats used only for gfu_boost calculation. 343 int num_stats_used_for_gfu_boost; 344 345 // Total number of stats required by gfu_boost calculation. 346 int num_stats_required_for_gfu_boost; 347 348 int enable_scenecut_detection; 349 350 int use_arf_in_this_kf_group; 351 352 int ni_frames; 353 354 double tot_q; 355 /*!\endcond */ 356 357 /*! 358 * Q used for last boosted (non leaf) frame 359 */ 360 int last_kf_qindex; 361 362 /*! 363 * Average of q index of previous encoded frames in a sequence. 364 */ 365 int avg_frame_qindex[FRAME_TYPES]; 366 367 #if CONFIG_FPMT_TEST 368 /*! 369 * Temporary variable used in simulating the delayed update of 370 * active_best_quality. 371 */ 372 int temp_active_best_quality[MAX_ARF_LAYERS + 1]; 373 374 /*! 375 * Temporary variable used in simulating the delayed update of 376 * last_boosted_qindex. 377 */ 378 int temp_last_boosted_qindex; 379 380 /*! 381 * Temporary variable used in simulating the delayed update of 382 * avg_q. 383 */ 384 double temp_avg_q; 385 386 /*! 387 * Temporary variable used in simulating the delayed update of 388 * last_q. 389 */ 390 int temp_last_q[FRAME_TYPES]; 391 392 /*! 393 * Temporary variable used in simulating the delayed update of 394 * projected_frame_size. 395 */ 396 int temp_projected_frame_size; 397 398 /*! 399 * Temporary variable used in simulating the delayed update of 400 * total_actual_bits. 401 */ 402 int64_t temp_total_actual_bits; 403 404 /*! 405 * Temporary variable used in simulating the delayed update of 406 * buffer_level. 407 */ 408 int64_t temp_buffer_level; 409 410 /*! 411 * Temporary variable used in simulating the delayed update of 412 * vbr_bits_off_target. 413 */ 414 int64_t temp_vbr_bits_off_target; 415 416 /*! 417 * Temporary variable used in simulating the delayed update of 418 * vbr_bits_off_target_fast. 419 */ 420 int64_t temp_vbr_bits_off_target_fast; 421 422 /*! 423 * Temporary variable used in simulating the delayed update of 424 * rate_correction_factors. 425 */ 426 double temp_rate_correction_factors[RATE_FACTOR_LEVELS]; 427 428 /*! 429 * Temporary variable used in simulating the delayed update of 430 * rate_error_estimate. 431 */ 432 int temp_rate_error_estimate; 433 434 /*! 435 * Temporary variable used in simulating the delayed update of 436 * rolling_arf_group_target_bits. 437 */ 438 int temp_rolling_arf_group_target_bits; 439 440 /*! 441 * Temporary variable used in simulating the delayed update of 442 * rolling_arf_group_actual_bits;. 443 */ 444 int temp_rolling_arf_group_actual_bits; 445 446 /*! 447 * Temporary variable used in simulating the delayed update of 448 * bits_left;. 449 */ 450 int64_t temp_bits_left; 451 452 /*! 453 * Temporary variable used in simulating the delayed update of 454 * extend_minq. 455 */ 456 int temp_extend_minq; 457 458 /*! 459 * Temporary variable used in simulating the delayed update of 460 * extend_maxq. 461 */ 462 int temp_extend_maxq; 463 464 /*! 465 * Temporary variable used in simulating the delayed update of 466 * extend_minq_fast. 467 */ 468 int temp_extend_minq_fast; 469 #endif 470 /*! 471 * Proposed minimum allowed Q different layers in a coding pyramid 472 */ 473 int active_best_quality[MAX_ARF_LAYERS + 1]; 474 475 /*! 476 * Q used for last boosted (non leaf) frame (GF/KF/ARF) 477 */ 478 int last_boosted_qindex; 479 480 /*! 481 * Average Q value of previous inter frames 482 */ 483 double avg_q; 484 485 /*! 486 * Q used on last encoded frame of the given type. 487 */ 488 int last_q[FRAME_TYPES]; 489 490 /*! 491 * Correction factors used to adjust the q estimate for a given target rate 492 * in the encode loop. 493 */ 494 double rate_correction_factors[RATE_FACTOR_LEVELS]; 495 496 /*! 497 * Current total consumed bits. 498 */ 499 int64_t total_actual_bits; 500 501 /*! 502 * Current total target bits. 503 */ 504 int64_t total_target_bits; 505 506 /*! 507 * Current buffer level. 508 */ 509 int64_t buffer_level; 510 511 /*! 512 * PCT rc error. 513 */ 514 int rate_error_estimate; 515 516 /*! 517 * Error bits available from previously encoded frames. 518 */ 519 int64_t vbr_bits_off_target; 520 521 /*! 522 * Error bits available from previously encoded frames undershoot. 523 */ 524 int64_t vbr_bits_off_target_fast; 525 526 /*! 527 * Total bits deviated from the average frame target, from previously 528 * encoded frames. 529 */ 530 int64_t bits_off_target; 531 532 /*! 533 * Rolling monitor target bits updated based on current frame target size. 534 */ 535 int rolling_target_bits; 536 537 /*! 538 * Rolling monitor actual bits updated based on current frame final projected 539 * size. 540 */ 541 int rolling_actual_bits; 542 543 /*! 544 * The history of qindex for each frame. 545 * Only used when RT_PASSIVE_STRATEGY = 1. 546 */ 547 int q_history[MAX_Q_HISTORY]; 548 } PRIMARY_RATE_CONTROL; 549 550 /*!\cond */ 551 552 struct AV1_COMP; 553 struct AV1EncoderConfig; 554 struct GF_GROUP; 555 556 void av1_primary_rc_init(const struct AV1EncoderConfig *oxcf, 557 PRIMARY_RATE_CONTROL *p_rc); 558 559 void av1_rc_init(const struct AV1EncoderConfig *oxcf, RATE_CONTROL *rc); 560 561 int av1_estimate_bits_at_q(const struct AV1_COMP *cpi, int q, 562 double correction_factor); 563 564 double av1_convert_qindex_to_q(int qindex, aom_bit_depth_t bit_depth); 565 566 void av1_rc_init_minq_luts(void); 567 568 int av1_rc_get_default_min_gf_interval(int width, int height, double framerate); 569 // Note av1_rc_get_default_max_gf_interval() requires the min_gf_interval to 570 // be passed in to ensure that the max_gf_interval returned is at least as bis 571 // as that. 572 int av1_rc_get_default_max_gf_interval(double framerate, int min_gf_interval); 573 574 // Generally at the high level, the following flow is expected 575 // to be enforced for rate control: 576 // First call per frame, one of: 577 // av1_get_one_pass_rt_params() 578 // av1_get_second_pass_params() 579 // depending on the usage to set the rate control encode parameters desired. 580 // 581 // Then, call encode_frame_to_data_rate() to perform the 582 // actual encode. This function will in turn call encode_frame() 583 // one or more times, followed by: 584 // av1_rc_postencode_update_drop_frame() 585 // 586 // The majority of rate control parameters are only expected 587 // to be set in the av1_get_..._params() functions and 588 // updated during the av1_rc_postencode_update...() functions. 589 // The only exceptions are av1_rc_drop_frame() and 590 // av1_rc_update_rate_correction_factors() functions. 591 592 // Functions to set parameters for encoding before the actual 593 // encode_frame_to_data_rate() function. 594 struct EncodeFrameInput; 595 596 // Post encode update of the rate control parameters based 597 // on bytes used 598 void av1_rc_postencode_update(struct AV1_COMP *cpi, uint64_t bytes_used); 599 // Post encode update of the rate control parameters for dropped frames 600 void av1_rc_postencode_update_drop_frame(struct AV1_COMP *cpi); 601 602 /*!\endcond */ 603 /*!\brief Updates the rate correction factor linking Q to output bits 604 * 605 * This function updates the Q rate correction factor after an encode 606 * cycle depending on whether we overshot or undershot the target rate. 607 * 608 * \ingroup rate_control 609 * \param[in] cpi Top level encoder instance structure 610 * \param[in] is_encode_stage Indicates if recode loop or post-encode 611 * \param[in] width Frame width 612 * \param[in] height Frame height 613 * 614 * \remark Updates the relevant rate correction factor in cpi->rc 615 */ 616 void av1_rc_update_rate_correction_factors(struct AV1_COMP *cpi, 617 int is_encode_stage, int width, 618 int height); 619 /*!\cond */ 620 621 // Decide if we should drop this frame: For 1-pass CBR. 622 // Changes only the decimation count in the rate control structure 623 int av1_rc_drop_frame(struct AV1_COMP *cpi); 624 625 // Computes frame size bounds. 626 void av1_rc_compute_frame_size_bounds(const struct AV1_COMP *cpi, 627 int this_frame_target, 628 int *frame_under_shoot_limit, 629 int *frame_over_shoot_limit); 630 631 /*!\endcond */ 632 633 /*!\brief Picks q and q bounds given the rate control parameters in \c cpi->rc. 634 * 635 * \ingroup rate_control 636 * \param[in] cpi Top level encoder structure 637 * \param[in] width Coded frame width 638 * \param[in] height Coded frame height 639 * \param[in] gf_index Index of this frame in the golden frame group 640 * \param[out] bottom_index Bottom bound for q index (best quality) 641 * \param[out] top_index Top bound for q index (worst quality) 642 * \return Returns selected q index to be used for encoding this frame. 643 * Also, updates \c rc->arf_q. 644 */ 645 int av1_rc_pick_q_and_bounds(struct AV1_COMP *cpi, int width, int height, 646 int gf_index, int *bottom_index, int *top_index); 647 648 /*!\brief Estimates q to achieve a target bits per frame 649 * 650 * \ingroup rate_control 651 * \param[in] cpi Top level encoder instance structure 652 * \param[in] target_bits_per_frame Frame rate target 653 * \param[in] active_worst_quality Max Q allowed 654 * \param[in] active_best_quality Min Q allowed 655 * \param[in] width Frame width 656 * \param[in] height Frame height 657 * 658 * \return Returns a q index value 659 */ 660 int av1_rc_regulate_q(const struct AV1_COMP *cpi, int target_bits_per_frame, 661 int active_best_quality, int active_worst_quality, 662 int width, int height); 663 664 /*!\cond */ 665 // Gets the appropriate bpmb ennumerator based on the frame and content type 666 int av1_get_bpmb_enumerator(FRAME_TYPE frame_type, 667 const int is_screen_content_type); 668 669 // Estimates bits per mb for a given qindex and correction factor. 670 int av1_rc_bits_per_mb(const struct AV1_COMP *cpi, FRAME_TYPE frame_type, 671 int qindex, double correction_factor, 672 int accurate_estimate); 673 674 // Clamping utilities for bitrate targets for iframes and pframes. 675 int av1_rc_clamp_iframe_target_size(const struct AV1_COMP *const cpi, 676 int64_t target); 677 int av1_rc_clamp_pframe_target_size(const struct AV1_COMP *const cpi, 678 int target, uint8_t frame_update_type); 679 680 // Find q_index corresponding to desired_q, within [best_qindex, worst_qindex]. 681 // To be precise, 'q_index' is the smallest integer, for which the corresponding 682 // q >= desired_q. 683 // If no such q index is found, returns 'worst_qindex'. 684 int av1_find_qindex(double desired_q, aom_bit_depth_t bit_depth, 685 int best_qindex, int worst_qindex); 686 687 // Computes a q delta (in "q index" terms) to get from a starting q value 688 // to a target q value 689 int av1_compute_qdelta(const RATE_CONTROL *rc, double qstart, double qtarget, 690 aom_bit_depth_t bit_depth); 691 692 // Computes a q delta (in "q index" terms) to get from a starting q value 693 // to a value that should equate to the given rate ratio. 694 int av1_compute_qdelta_by_rate(const struct AV1_COMP *cpi, 695 FRAME_TYPE frame_type, int qindex, 696 double rate_target_ratio); 697 698 int av1_frame_type_qdelta(const struct AV1_COMP *cpi, int q); 699 700 void av1_rc_update_framerate(struct AV1_COMP *cpi, int width, int height); 701 702 void av1_rc_set_gf_interval_range(const struct AV1_COMP *const cpi, 703 RATE_CONTROL *const rc); 704 705 void av1_set_target_rate(struct AV1_COMP *cpi, int width, int height); 706 707 int av1_resize_one_pass_cbr(struct AV1_COMP *cpi); 708 709 void av1_rc_set_frame_target(struct AV1_COMP *cpi, int target, int width, 710 int height); 711 712 void av1_adjust_gf_refresh_qp_one_pass_rt(struct AV1_COMP *cpi); 713 714 void av1_set_rtc_reference_structure_one_layer(struct AV1_COMP *cpi, 715 int gf_update); 716 717 /*!\endcond */ 718 /*!\brief Calculates how many bits to use for a P frame in one pass vbr 719 * 720 * \ingroup rate_control 721 * \callgraph 722 * \callergraph 723 * 724 * \param[in] cpi Top level encoder structure 725 * \param[in] frame_update_type Type of frame 726 * 727 * \return Returns the target number of bits for this frame. 728 */ 729 int av1_calc_pframe_target_size_one_pass_vbr( 730 const struct AV1_COMP *const cpi, FRAME_UPDATE_TYPE frame_update_type); 731 732 /*!\brief Calculates how many bits to use for an i frame in one pass vbr 733 * 734 * \ingroup rate_control 735 * \callgraph 736 * \callergraph 737 * 738 * \param[in] cpi Top level encoder structure 739 * 740 * \return Returns the target number of bits for this frame. 741 */ 742 int av1_calc_iframe_target_size_one_pass_vbr(const struct AV1_COMP *const cpi); 743 744 /*!\brief Calculates how many bits to use for a P frame in one pass cbr 745 * 746 * \ingroup rate_control 747 * \callgraph 748 * \callergraph 749 * 750 * \param[in] cpi Top level encoder structure 751 * \param[in] frame_update_type Type of frame 752 * 753 * \return Returns the target number of bits for this frame. 754 */ 755 int av1_calc_pframe_target_size_one_pass_cbr( 756 const struct AV1_COMP *cpi, FRAME_UPDATE_TYPE frame_update_type); 757 758 /*!\brief Calculates how many bits to use for an i frame in one pass cbr 759 * 760 * \ingroup rate_control 761 * \callgraph 762 * \callergraph 763 * 764 * \param[in] cpi Top level encoder structure 765 * 766 * \return Returns the target number of bits for this frame. 767 */ 768 int av1_calc_iframe_target_size_one_pass_cbr(const struct AV1_COMP *cpi); 769 770 /*!\brief Setup the rate control parameters for 1 pass real-time mode. 771 * 772 * - Sets the frame type and target frame size. 773 * - Sets the GF update. 774 * - Checks for scene change. 775 * - Sets the reference prediction structure for 1 layers (non-SVC). 776 * - Resets and updates are done for SVC. 777 * 778 * \ingroup rate_control 779 * \param[in] cpi Top level encoder structure 780 * \param[in] frame_type Encoder frame type 781 * \param[in] frame_input Current and last input source frames 782 * \param[in] frame_flags Encoder frame flags 783 * 784 * \remark Nothing is returned. Instead the settings computed in this 785 * function are set in: \c frame_params, \c cpi->common, \c cpi->rc, 786 * \c cpi->svc. 787 */ 788 void av1_get_one_pass_rt_params(struct AV1_COMP *cpi, 789 FRAME_TYPE *const frame_type, 790 const struct EncodeFrameInput *frame_input, 791 unsigned int frame_flags); 792 793 /*!\brief Increase q on expected encoder overshoot, for CBR mode. 794 * 795 * Handles the case when encoder is expected to create a large frame: 796 * - q is increased to value closer to \c cpi->rc.worst_quality 797 * - avg_frame_qindex is reset 798 * - buffer levels are reset 799 * - rate correction factor is adjusted 800 * 801 * \ingroup rate_control 802 * \param[in] cpi Top level encoder structure 803 * \param[in] q Current q index 804 * 805 * \return q is returned, and updates are done to \c cpi->rc. 806 */ 807 int av1_encodedframe_overshoot_cbr(struct AV1_COMP *cpi, int *q); 808 809 /*!\brief Compute the q_indices for a single frame. 810 * 811 * Intended to be used with AOM_Q mode. 812 * 813 * \param[in] base_q_index Base q index 814 * \param[in] gf_update_type GOP update type 815 * \param[in] gf_pyramid_level GOP level of the current frame 816 * \param[in] arf_q ARF q_index 817 * 818 * \return Returns the q_index for the current frame. 819 */ 820 int av1_q_mode_get_q_index(int base_q_index, int gf_update_type, 821 int gf_pyramid_level, int arf_q); 822 823 /*!\brief Compute the q_indices for the ARF of a GOP. 824 * 825 * \param[in] base_q_index Base q index 826 * \param[in] gfu_boost GFU boost 827 * \param[in] bit_depth Bit depth 828 * \param[in] arf_boost_factor ARF boost factor 829 * 830 * \return Returns the q_index for the ARF frame. 831 */ 832 int av1_get_arf_q_index(int base_q_index, int gfu_boost, int bit_depth, 833 double arf_boost_factor); 834 835 #if !CONFIG_REALTIME_ONLY 836 struct TplDepFrame; 837 /*!\brief Compute the q_indices for the ARF of a GOP in Q mode. 838 * 839 * \param[in] cpi Top level encoder structure 840 * \param[in] tpl_frame Tpl Frame stats 841 * 842 * \return Returns the q_index for the ARF frame. 843 */ 844 int av1_get_arf_q_index_q_mode(struct AV1_COMP *cpi, 845 struct TplDepFrame *tpl_frame); 846 #endif 847 #ifdef __cplusplus 848 } // extern "C" 849 #endif 850 851 #endif // AOM_AV1_ENCODER_RATECTRL_H_ 852