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      1 /*
      2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #ifndef VP9_ENCODER_VP9_ENCODER_H_
     12 #define VP9_ENCODER_VP9_ENCODER_H_
     13 
     14 #include <stdio.h>
     15 
     16 #include "./vpx_config.h"
     17 #include "vpx/internal/vpx_codec_internal.h"
     18 #include "vpx/vp8cx.h"
     19 #if CONFIG_INTERNAL_STATS
     20 #include "vpx_dsp/ssim.h"
     21 #endif
     22 #include "vpx_dsp/variance.h"
     23 #include "vpx_ports/system_state.h"
     24 #include "vpx_util/vpx_thread.h"
     25 
     26 #include "vp9/common/vp9_alloccommon.h"
     27 #include "vp9/common/vp9_ppflags.h"
     28 #include "vp9/common/vp9_entropymode.h"
     29 #include "vp9/common/vp9_thread_common.h"
     30 #include "vp9/common/vp9_onyxc_int.h"
     31 
     32 #include "vp9/encoder/vp9_alt_ref_aq.h"
     33 #include "vp9/encoder/vp9_aq_cyclicrefresh.h"
     34 #include "vp9/encoder/vp9_context_tree.h"
     35 #include "vp9/encoder/vp9_encodemb.h"
     36 #include "vp9/encoder/vp9_ethread.h"
     37 #include "vp9/encoder/vp9_firstpass.h"
     38 #include "vp9/encoder/vp9_job_queue.h"
     39 #include "vp9/encoder/vp9_lookahead.h"
     40 #include "vp9/encoder/vp9_mbgraph.h"
     41 #include "vp9/encoder/vp9_mcomp.h"
     42 #include "vp9/encoder/vp9_noise_estimate.h"
     43 #include "vp9/encoder/vp9_quantize.h"
     44 #include "vp9/encoder/vp9_ratectrl.h"
     45 #include "vp9/encoder/vp9_rd.h"
     46 #include "vp9/encoder/vp9_speed_features.h"
     47 #include "vp9/encoder/vp9_svc_layercontext.h"
     48 #include "vp9/encoder/vp9_tokenize.h"
     49 
     50 #if CONFIG_VP9_TEMPORAL_DENOISING
     51 #include "vp9/encoder/vp9_denoiser.h"
     52 #endif
     53 
     54 #ifdef __cplusplus
     55 extern "C" {
     56 #endif
     57 
     58 // vp9 uses 10,000,000 ticks/second as time stamp
     59 #define TICKS_PER_SEC 10000000
     60 
     61 typedef struct {
     62   int nmvjointcost[MV_JOINTS];
     63   int nmvcosts[2][MV_VALS];
     64   int nmvcosts_hp[2][MV_VALS];
     65 
     66   vpx_prob segment_pred_probs[PREDICTION_PROBS];
     67 
     68   unsigned char *last_frame_seg_map_copy;
     69 
     70   // 0 = Intra, Last, GF, ARF
     71   signed char last_ref_lf_deltas[MAX_REF_LF_DELTAS];
     72   // 0 = ZERO_MV, MV
     73   signed char last_mode_lf_deltas[MAX_MODE_LF_DELTAS];
     74 
     75   FRAME_CONTEXT fc;
     76 } CODING_CONTEXT;
     77 
     78 typedef enum {
     79   // encode_breakout is disabled.
     80   ENCODE_BREAKOUT_DISABLED = 0,
     81   // encode_breakout is enabled.
     82   ENCODE_BREAKOUT_ENABLED = 1,
     83   // encode_breakout is enabled with small max_thresh limit.
     84   ENCODE_BREAKOUT_LIMITED = 2
     85 } ENCODE_BREAKOUT_TYPE;
     86 
     87 typedef enum {
     88   NORMAL = 0,
     89   FOURFIVE = 1,
     90   THREEFIVE = 2,
     91   ONETWO = 3
     92 } VPX_SCALING;
     93 
     94 typedef enum {
     95   // Good Quality Fast Encoding. The encoder balances quality with the amount of
     96   // time it takes to encode the output. Speed setting controls how fast.
     97   GOOD,
     98 
     99   // The encoder places priority on the quality of the output over encoding
    100   // speed. The output is compressed at the highest possible quality. This
    101   // option takes the longest amount of time to encode. Speed setting ignored.
    102   BEST,
    103 
    104   // Realtime/Live Encoding. This mode is optimized for realtime encoding (for
    105   // example, capturing a television signal or feed from a live camera). Speed
    106   // setting controls how fast.
    107   REALTIME
    108 } MODE;
    109 
    110 typedef enum {
    111   FRAMEFLAGS_KEY = 1 << 0,
    112   FRAMEFLAGS_GOLDEN = 1 << 1,
    113   FRAMEFLAGS_ALTREF = 1 << 2,
    114 } FRAMETYPE_FLAGS;
    115 
    116 typedef enum {
    117   NO_AQ = 0,
    118   VARIANCE_AQ = 1,
    119   COMPLEXITY_AQ = 2,
    120   CYCLIC_REFRESH_AQ = 3,
    121   EQUATOR360_AQ = 4,
    122   // AQ based on lookahead temporal
    123   // variance (only valid for altref frames)
    124   LOOKAHEAD_AQ = 5,
    125   AQ_MODE_COUNT  // This should always be the last member of the enum
    126 } AQ_MODE;
    127 
    128 typedef enum {
    129   RESIZE_NONE = 0,    // No frame resizing allowed (except for SVC).
    130   RESIZE_FIXED = 1,   // All frames are coded at the specified dimension.
    131   RESIZE_DYNAMIC = 2  // Coded size of each frame is determined by the codec.
    132 } RESIZE_TYPE;
    133 
    134 typedef enum {
    135   kInvalid = 0,
    136   kLowSadLowSumdiff = 1,
    137   kLowSadHighSumdiff = 2,
    138   kHighSadLowSumdiff = 3,
    139   kHighSadHighSumdiff = 4,
    140   kLowVarHighSumdiff = 5,
    141 } CONTENT_STATE_SB;
    142 
    143 typedef struct VP9EncoderConfig {
    144   BITSTREAM_PROFILE profile;
    145   vpx_bit_depth_t bit_depth;     // Codec bit-depth.
    146   int width;                     // width of data passed to the compressor
    147   int height;                    // height of data passed to the compressor
    148   unsigned int input_bit_depth;  // Input bit depth.
    149   double init_framerate;         // set to passed in framerate
    150   int64_t target_bandwidth;      // bandwidth to be used in bits per second
    151 
    152   int noise_sensitivity;  // pre processing blur: recommendation 0
    153   int sharpness;          // sharpening output: recommendation 0:
    154   int speed;
    155   // maximum allowed bitrate for any intra frame in % of bitrate target.
    156   unsigned int rc_max_intra_bitrate_pct;
    157   // maximum allowed bitrate for any inter frame in % of bitrate target.
    158   unsigned int rc_max_inter_bitrate_pct;
    159   // percent of rate boost for golden frame in CBR mode.
    160   unsigned int gf_cbr_boost_pct;
    161 
    162   MODE mode;
    163   int pass;
    164 
    165   // Key Framing Operations
    166   int auto_key;  // autodetect cut scenes and set the keyframes
    167   int key_freq;  // maximum distance to key frame.
    168 
    169   int lag_in_frames;  // how many frames lag before we start encoding
    170 
    171   // ----------------------------------------------------------------
    172   // DATARATE CONTROL OPTIONS
    173 
    174   // vbr, cbr, constrained quality or constant quality
    175   enum vpx_rc_mode rc_mode;
    176 
    177   // buffer targeting aggressiveness
    178   int under_shoot_pct;
    179   int over_shoot_pct;
    180 
    181   // buffering parameters
    182   int64_t starting_buffer_level_ms;
    183   int64_t optimal_buffer_level_ms;
    184   int64_t maximum_buffer_size_ms;
    185 
    186   // Frame drop threshold.
    187   int drop_frames_water_mark;
    188 
    189   // controlling quality
    190   int fixed_q;
    191   int worst_allowed_q;
    192   int best_allowed_q;
    193   int cq_level;
    194   AQ_MODE aq_mode;  // Adaptive Quantization mode
    195 
    196   // Special handling of Adaptive Quantization for AltRef frames
    197   int alt_ref_aq;
    198 
    199   // Internal frame size scaling.
    200   RESIZE_TYPE resize_mode;
    201   int scaled_frame_width;
    202   int scaled_frame_height;
    203 
    204   // Enable feature to reduce the frame quantization every x frames.
    205   int frame_periodic_boost;
    206 
    207   // two pass datarate control
    208   int two_pass_vbrbias;  // two pass datarate control tweaks
    209   int two_pass_vbrmin_section;
    210   int two_pass_vbrmax_section;
    211   // END DATARATE CONTROL OPTIONS
    212   // ----------------------------------------------------------------
    213 
    214   // Spatial and temporal scalability.
    215   int ss_number_layers;  // Number of spatial layers.
    216   int ts_number_layers;  // Number of temporal layers.
    217   // Bitrate allocation for spatial layers.
    218   int layer_target_bitrate[VPX_MAX_LAYERS];
    219   int ss_target_bitrate[VPX_SS_MAX_LAYERS];
    220   int ss_enable_auto_arf[VPX_SS_MAX_LAYERS];
    221   // Bitrate allocation (CBR mode) and framerate factor, for temporal layers.
    222   int ts_rate_decimator[VPX_TS_MAX_LAYERS];
    223 
    224   int enable_auto_arf;
    225 
    226   int encode_breakout;  // early breakout : for video conf recommend 800
    227 
    228   /* Bitfield defining the error resiliency features to enable.
    229    * Can provide decodable frames after losses in previous
    230    * frames and decodable partitions after losses in the same frame.
    231    */
    232   unsigned int error_resilient_mode;
    233 
    234   /* Bitfield defining the parallel decoding mode where the
    235    * decoding in successive frames may be conducted in parallel
    236    * just by decoding the frame headers.
    237    */
    238   unsigned int frame_parallel_decoding_mode;
    239 
    240   int arnr_max_frames;
    241   int arnr_strength;
    242 
    243   int min_gf_interval;
    244   int max_gf_interval;
    245 
    246   int tile_columns;
    247   int tile_rows;
    248 
    249   int max_threads;
    250 
    251   unsigned int target_level;
    252 
    253   vpx_fixed_buf_t two_pass_stats_in;
    254   struct vpx_codec_pkt_list *output_pkt_list;
    255 
    256 #if CONFIG_FP_MB_STATS
    257   vpx_fixed_buf_t firstpass_mb_stats_in;
    258 #endif
    259 
    260   vp8e_tuning tuning;
    261   vp9e_tune_content content;
    262 #if CONFIG_VP9_HIGHBITDEPTH
    263   int use_highbitdepth;
    264 #endif
    265   vpx_color_space_t color_space;
    266   vpx_color_range_t color_range;
    267   int render_width;
    268   int render_height;
    269   VP9E_TEMPORAL_LAYERING_MODE temporal_layering_mode;
    270 
    271   int row_mt;
    272   unsigned int motion_vector_unit_test;
    273 } VP9EncoderConfig;
    274 
    275 static INLINE int is_lossless_requested(const VP9EncoderConfig *cfg) {
    276   return cfg->best_allowed_q == 0 && cfg->worst_allowed_q == 0;
    277 }
    278 
    279 // TODO(jingning) All spatially adaptive variables should go to TileDataEnc.
    280 typedef struct TileDataEnc {
    281   TileInfo tile_info;
    282   int thresh_freq_fact[BLOCK_SIZES][MAX_MODES];
    283   int mode_map[BLOCK_SIZES][MAX_MODES];
    284   FIRSTPASS_DATA fp_data;
    285   VP9RowMTSync row_mt_sync;
    286 
    287   // Used for adaptive_rd_thresh with row multithreading
    288   int *row_base_thresh_freq_fact;
    289 } TileDataEnc;
    290 
    291 typedef struct RowMTInfo {
    292   JobQueueHandle job_queue_hdl;
    293 #if CONFIG_MULTITHREAD
    294   pthread_mutex_t job_mutex;
    295 #endif
    296 } RowMTInfo;
    297 
    298 typedef struct {
    299   TOKENEXTRA *start;
    300   TOKENEXTRA *stop;
    301   unsigned int count;
    302 } TOKENLIST;
    303 
    304 typedef struct MultiThreadHandle {
    305   int allocated_tile_rows;
    306   int allocated_tile_cols;
    307   int allocated_vert_unit_rows;
    308 
    309   // Frame level params
    310   int num_tile_vert_sbs[MAX_NUM_TILE_ROWS];
    311 
    312   // Job Queue structure and handles
    313   JobQueue *job_queue;
    314 
    315   int jobs_per_tile_col;
    316 
    317   RowMTInfo row_mt_info[MAX_NUM_TILE_COLS];
    318   int thread_id_to_tile_id[MAX_NUM_THREADS];  // Mapping of threads to tiles
    319 } MultiThreadHandle;
    320 
    321 typedef struct RD_COUNTS {
    322   vp9_coeff_count coef_counts[TX_SIZES][PLANE_TYPES];
    323   int64_t comp_pred_diff[REFERENCE_MODES];
    324   int64_t filter_diff[SWITCHABLE_FILTER_CONTEXTS];
    325 } RD_COUNTS;
    326 
    327 typedef struct ThreadData {
    328   MACROBLOCK mb;
    329   RD_COUNTS rd_counts;
    330   FRAME_COUNTS *counts;
    331 
    332   PICK_MODE_CONTEXT *leaf_tree;
    333   PC_TREE *pc_tree;
    334   PC_TREE *pc_root;
    335 } ThreadData;
    336 
    337 struct EncWorkerData;
    338 
    339 typedef struct ActiveMap {
    340   int enabled;
    341   int update;
    342   unsigned char *map;
    343 } ActiveMap;
    344 
    345 typedef enum { Y, U, V, ALL } STAT_TYPE;
    346 
    347 typedef struct IMAGE_STAT {
    348   double stat[ALL + 1];
    349   double worst;
    350 } ImageStat;
    351 
    352 // Kf noise filtering currently disabled by default in build.
    353 // #define ENABLE_KF_DENOISE 1
    354 
    355 #define CPB_WINDOW_SIZE 4
    356 #define FRAME_WINDOW_SIZE 128
    357 #define SAMPLE_RATE_GRACE_P 0.015
    358 #define VP9_LEVELS 14
    359 
    360 typedef enum {
    361   LEVEL_UNKNOWN = 0,
    362   LEVEL_1 = 10,
    363   LEVEL_1_1 = 11,
    364   LEVEL_2 = 20,
    365   LEVEL_2_1 = 21,
    366   LEVEL_3 = 30,
    367   LEVEL_3_1 = 31,
    368   LEVEL_4 = 40,
    369   LEVEL_4_1 = 41,
    370   LEVEL_5 = 50,
    371   LEVEL_5_1 = 51,
    372   LEVEL_5_2 = 52,
    373   LEVEL_6 = 60,
    374   LEVEL_6_1 = 61,
    375   LEVEL_6_2 = 62,
    376   LEVEL_MAX = 255
    377 } VP9_LEVEL;
    378 
    379 typedef struct {
    380   VP9_LEVEL level;
    381   uint64_t max_luma_sample_rate;
    382   uint32_t max_luma_picture_size;
    383   double average_bitrate;  // in kilobits per second
    384   double max_cpb_size;     // in kilobits
    385   double compression_ratio;
    386   uint8_t max_col_tiles;
    387   uint32_t min_altref_distance;
    388   uint8_t max_ref_frame_buffers;
    389 } Vp9LevelSpec;
    390 
    391 extern const Vp9LevelSpec vp9_level_defs[VP9_LEVELS];
    392 
    393 typedef struct {
    394   int64_t ts;  // timestamp
    395   uint32_t luma_samples;
    396   uint32_t size;  // in bytes
    397 } FrameRecord;
    398 
    399 typedef struct {
    400   FrameRecord buf[FRAME_WINDOW_SIZE];
    401   uint8_t start;
    402   uint8_t len;
    403 } FrameWindowBuffer;
    404 
    405 typedef struct {
    406   uint8_t seen_first_altref;
    407   uint32_t frames_since_last_altref;
    408   uint64_t total_compressed_size;
    409   uint64_t total_uncompressed_size;
    410   double time_encoded;  // in seconds
    411   FrameWindowBuffer frame_window_buffer;
    412   int ref_refresh_map;
    413 } Vp9LevelStats;
    414 
    415 typedef struct {
    416   Vp9LevelStats level_stats;
    417   Vp9LevelSpec level_spec;
    418 } Vp9LevelInfo;
    419 
    420 typedef enum {
    421   BITRATE_TOO_LARGE = 0,
    422   LUMA_PIC_SIZE_TOO_LARGE = 1,
    423   LUMA_SAMPLE_RATE_TOO_LARGE = 2,
    424   CPB_TOO_LARGE = 3,
    425   COMPRESSION_RATIO_TOO_SMALL = 4,
    426   TOO_MANY_COLUMN_TILE = 5,
    427   ALTREF_DIST_TOO_SMALL = 6,
    428   TOO_MANY_REF_BUFFER = 7,
    429   TARGET_LEVEL_FAIL_IDS = 8
    430 } TARGET_LEVEL_FAIL_ID;
    431 
    432 typedef struct {
    433   int8_t level_index;
    434   uint8_t rc_config_updated;
    435   uint8_t fail_flag;
    436   int max_frame_size;   // in bits
    437   double max_cpb_size;  // in bits
    438 } LevelConstraint;
    439 
    440 typedef struct ARNRFilterData {
    441   YV12_BUFFER_CONFIG *frames[MAX_LAG_BUFFERS];
    442   int strength;
    443   int frame_count;
    444   int alt_ref_index;
    445   struct scale_factors sf;
    446 } ARNRFilterData;
    447 
    448 typedef struct VP9_COMP {
    449   QUANTS quants;
    450   ThreadData td;
    451   MB_MODE_INFO_EXT *mbmi_ext_base;
    452   DECLARE_ALIGNED(16, int16_t, y_dequant[QINDEX_RANGE][8]);
    453   DECLARE_ALIGNED(16, int16_t, uv_dequant[QINDEX_RANGE][8]);
    454   VP9_COMMON common;
    455   VP9EncoderConfig oxcf;
    456   struct lookahead_ctx *lookahead;
    457   struct lookahead_entry *alt_ref_source;
    458 
    459   YV12_BUFFER_CONFIG *Source;
    460   YV12_BUFFER_CONFIG *Last_Source;  // NULL for first frame and alt_ref frames
    461   YV12_BUFFER_CONFIG *un_scaled_source;
    462   YV12_BUFFER_CONFIG scaled_source;
    463   YV12_BUFFER_CONFIG *unscaled_last_source;
    464   YV12_BUFFER_CONFIG scaled_last_source;
    465 #ifdef ENABLE_KF_DENOISE
    466   YV12_BUFFER_CONFIG raw_unscaled_source;
    467   YV12_BUFFER_CONFIG raw_scaled_source;
    468 #endif
    469   YV12_BUFFER_CONFIG *raw_source_frame;
    470 
    471   TileDataEnc *tile_data;
    472   int allocated_tiles;  // Keep track of memory allocated for tiles.
    473 
    474   // For a still frame, this flag is set to 1 to skip partition search.
    475   int partition_search_skippable_frame;
    476 
    477   int scaled_ref_idx[MAX_REF_FRAMES];
    478   int lst_fb_idx;
    479   int gld_fb_idx;
    480   int alt_fb_idx;
    481 
    482   int refresh_last_frame;
    483   int refresh_golden_frame;
    484   int refresh_alt_ref_frame;
    485 
    486   int ext_refresh_frame_flags_pending;
    487   int ext_refresh_last_frame;
    488   int ext_refresh_golden_frame;
    489   int ext_refresh_alt_ref_frame;
    490 
    491   int ext_refresh_frame_context_pending;
    492   int ext_refresh_frame_context;
    493 
    494   YV12_BUFFER_CONFIG last_frame_uf;
    495 
    496   TOKENEXTRA *tile_tok[4][1 << 6];
    497   uint32_t tok_count[4][1 << 6];
    498   TOKENLIST *tplist[4][1 << 6];
    499 
    500   // Ambient reconstruction err target for force key frames
    501   int64_t ambient_err;
    502 
    503   RD_OPT rd;
    504 
    505   CODING_CONTEXT coding_context;
    506 
    507   int *nmvcosts[2];
    508   int *nmvcosts_hp[2];
    509   int *nmvsadcosts[2];
    510   int *nmvsadcosts_hp[2];
    511 
    512   int64_t last_time_stamp_seen;
    513   int64_t last_end_time_stamp_seen;
    514   int64_t first_time_stamp_ever;
    515 
    516   RATE_CONTROL rc;
    517   double framerate;
    518 
    519   int interp_filter_selected[MAX_REF_FRAMES][SWITCHABLE];
    520 
    521   struct vpx_codec_pkt_list *output_pkt_list;
    522 
    523   MBGRAPH_FRAME_STATS mbgraph_stats[MAX_LAG_BUFFERS];
    524   int mbgraph_n_frames;  // number of frames filled in the above
    525   int static_mb_pct;     // % forced skip mbs by segmentation
    526   int ref_frame_flags;
    527 
    528   SPEED_FEATURES sf;
    529 
    530   uint32_t max_mv_magnitude;
    531   int mv_step_param;
    532 
    533   int allow_comp_inter_inter;
    534 
    535   // Default value is 1. From first pass stats, encode_breakout may be disabled.
    536   ENCODE_BREAKOUT_TYPE allow_encode_breakout;
    537 
    538   // Get threshold from external input. A suggested threshold is 800 for HD
    539   // clips, and 300 for < HD clips.
    540   int encode_breakout;
    541 
    542   uint8_t *segmentation_map;
    543 
    544   // segment threashold for encode breakout
    545   int segment_encode_breakout[MAX_SEGMENTS];
    546 
    547   CYCLIC_REFRESH *cyclic_refresh;
    548   ActiveMap active_map;
    549 
    550   fractional_mv_step_fp *find_fractional_mv_step;
    551   vp9_full_search_fn_t full_search_sad;
    552   vp9_diamond_search_fn_t diamond_search_sad;
    553   vp9_variance_fn_ptr_t fn_ptr[BLOCK_SIZES];
    554   uint64_t time_receive_data;
    555   uint64_t time_compress_data;
    556   uint64_t time_pick_lpf;
    557   uint64_t time_encode_sb_row;
    558 
    559 #if CONFIG_FP_MB_STATS
    560   int use_fp_mb_stats;
    561 #endif
    562 
    563   TWO_PASS twopass;
    564 
    565   // Force recalculation of segment_ids for each mode info
    566   uint8_t force_update_segmentation;
    567 
    568   YV12_BUFFER_CONFIG alt_ref_buffer;
    569 
    570   // class responsible for adaptive
    571   // quantization of altref frames
    572   struct ALT_REF_AQ *alt_ref_aq;
    573 
    574 #if CONFIG_INTERNAL_STATS
    575   unsigned int mode_chosen_counts[MAX_MODES];
    576 
    577   int count;
    578   uint64_t total_sq_error;
    579   uint64_t total_samples;
    580   ImageStat psnr;
    581 
    582   uint64_t totalp_sq_error;
    583   uint64_t totalp_samples;
    584   ImageStat psnrp;
    585 
    586   double total_blockiness;
    587   double worst_blockiness;
    588 
    589   int bytes;
    590   double summed_quality;
    591   double summed_weights;
    592   double summedp_quality;
    593   double summedp_weights;
    594   unsigned int tot_recode_hits;
    595   double worst_ssim;
    596 
    597   ImageStat ssimg;
    598   ImageStat fastssim;
    599   ImageStat psnrhvs;
    600 
    601   int b_calculate_ssimg;
    602   int b_calculate_blockiness;
    603 
    604   int b_calculate_consistency;
    605 
    606   double total_inconsistency;
    607   double worst_consistency;
    608   Ssimv *ssim_vars;
    609   Metrics metrics;
    610 #endif
    611   int b_calculate_psnr;
    612 
    613   int droppable;
    614 
    615   int initial_width;
    616   int initial_height;
    617   int initial_mbs;  // Number of MBs in the full-size frame; to be used to
    618                     // normalize the firstpass stats. This will differ from the
    619                     // number of MBs in the current frame when the frame is
    620                     // scaled.
    621 
    622   int use_svc;
    623 
    624   SVC svc;
    625 
    626   // Store frame variance info in SOURCE_VAR_BASED_PARTITION search type.
    627   diff *source_diff_var;
    628   // The threshold used in SOURCE_VAR_BASED_PARTITION search type.
    629   unsigned int source_var_thresh;
    630   int frames_till_next_var_check;
    631 
    632   int frame_flags;
    633 
    634   search_site_config ss_cfg;
    635 
    636   int mbmode_cost[INTRA_MODES];
    637   unsigned int inter_mode_cost[INTER_MODE_CONTEXTS][INTER_MODES];
    638   int intra_uv_mode_cost[FRAME_TYPES][INTRA_MODES][INTRA_MODES];
    639   int y_mode_costs[INTRA_MODES][INTRA_MODES][INTRA_MODES];
    640   int switchable_interp_costs[SWITCHABLE_FILTER_CONTEXTS][SWITCHABLE_FILTERS];
    641   int partition_cost[PARTITION_CONTEXTS][PARTITION_TYPES];
    642 
    643   int multi_arf_allowed;
    644   int multi_arf_enabled;
    645   int multi_arf_last_grp_enabled;
    646 
    647 #if CONFIG_VP9_TEMPORAL_DENOISING
    648   VP9_DENOISER denoiser;
    649 #endif
    650 
    651   int resize_pending;
    652   RESIZE_STATE resize_state;
    653   int external_resize;
    654   int resize_scale_num;
    655   int resize_scale_den;
    656   int resize_avg_qp;
    657   int resize_buffer_underflow;
    658   int resize_count;
    659 
    660   int use_skin_detection;
    661 
    662   int target_level;
    663 
    664   NOISE_ESTIMATE noise_estimate;
    665 
    666   // Count on how many consecutive times a block uses small/zeromv for encoding.
    667   uint8_t *consec_zero_mv;
    668 
    669   // VAR_BASED_PARTITION thresholds
    670   // 0 - threshold_64x64; 1 - threshold_32x32;
    671   // 2 - threshold_16x16; 3 - vbp_threshold_8x8;
    672   int64_t vbp_thresholds[4];
    673   int64_t vbp_threshold_minmax;
    674   int64_t vbp_threshold_sad;
    675   // Threshold used for partition copy
    676   int64_t vbp_threshold_copy;
    677   BLOCK_SIZE vbp_bsize_min;
    678 
    679   // Multi-threading
    680   int num_workers;
    681   VPxWorker *workers;
    682   struct EncWorkerData *tile_thr_data;
    683   VP9LfSync lf_row_sync;
    684   struct VP9BitstreamWorkerData *vp9_bitstream_worker_data;
    685 
    686   int keep_level_stats;
    687   Vp9LevelInfo level_info;
    688   MultiThreadHandle multi_thread_ctxt;
    689   void (*row_mt_sync_read_ptr)(VP9RowMTSync *const, int, int);
    690   void (*row_mt_sync_write_ptr)(VP9RowMTSync *const, int, int, const int);
    691   ARNRFilterData arnr_filter_data;
    692 
    693   int row_mt;
    694   unsigned int row_mt_bit_exact;
    695 
    696   // Previous Partition Info
    697   BLOCK_SIZE *prev_partition;
    698   int8_t *prev_segment_id;
    699   // Used to save the status of whether a block has a low variance in
    700   // choose_partitioning. 0 for 64x64, 1~2 for 64x32, 3~4 for 32x64, 5~8 for
    701   // 32x32, 9~24 for 16x16.
    702   // This is for the last frame and is copied to the current frame
    703   // when partition copy happens.
    704   uint8_t *prev_variance_low;
    705   uint8_t *copied_frame_cnt;
    706   uint8_t max_copied_frame;
    707   // If the last frame is dropped, we don't copy partition.
    708   uint8_t last_frame_dropped;
    709 
    710   // For each superblock: keeps track of the last time (in frame distance) the
    711   // the superblock did not have low source sad.
    712   uint8_t *content_state_sb_fd;
    713 
    714   int compute_source_sad_onepass;
    715 
    716   LevelConstraint level_constraint;
    717 } VP9_COMP;
    718 
    719 void vp9_initialize_enc(void);
    720 
    721 struct VP9_COMP *vp9_create_compressor(VP9EncoderConfig *oxcf,
    722                                        BufferPool *const pool);
    723 void vp9_remove_compressor(VP9_COMP *cpi);
    724 
    725 void vp9_change_config(VP9_COMP *cpi, const VP9EncoderConfig *oxcf);
    726 
    727 // receive a frames worth of data. caller can assume that a copy of this
    728 // frame is made and not just a copy of the pointer..
    729 int vp9_receive_raw_frame(VP9_COMP *cpi, vpx_enc_frame_flags_t frame_flags,
    730                           YV12_BUFFER_CONFIG *sd, int64_t time_stamp,
    731                           int64_t end_time_stamp);
    732 
    733 int vp9_get_compressed_data(VP9_COMP *cpi, unsigned int *frame_flags,
    734                             size_t *size, uint8_t *dest, int64_t *time_stamp,
    735                             int64_t *time_end, int flush);
    736 
    737 int vp9_get_preview_raw_frame(VP9_COMP *cpi, YV12_BUFFER_CONFIG *dest,
    738                               vp9_ppflags_t *flags);
    739 
    740 int vp9_use_as_reference(VP9_COMP *cpi, int ref_frame_flags);
    741 
    742 void vp9_update_reference(VP9_COMP *cpi, int ref_frame_flags);
    743 
    744 int vp9_copy_reference_enc(VP9_COMP *cpi, VP9_REFFRAME ref_frame_flag,
    745                            YV12_BUFFER_CONFIG *sd);
    746 
    747 int vp9_set_reference_enc(VP9_COMP *cpi, VP9_REFFRAME ref_frame_flag,
    748                           YV12_BUFFER_CONFIG *sd);
    749 
    750 int vp9_update_entropy(VP9_COMP *cpi, int update);
    751 
    752 int vp9_set_active_map(VP9_COMP *cpi, unsigned char *map, int rows, int cols);
    753 
    754 int vp9_get_active_map(VP9_COMP *cpi, unsigned char *map, int rows, int cols);
    755 
    756 int vp9_set_internal_size(VP9_COMP *cpi, VPX_SCALING horiz_mode,
    757                           VPX_SCALING vert_mode);
    758 
    759 int vp9_set_size_literal(VP9_COMP *cpi, unsigned int width,
    760                          unsigned int height);
    761 
    762 void vp9_set_svc(VP9_COMP *cpi, int use_svc);
    763 
    764 int vp9_get_quantizer(struct VP9_COMP *cpi);
    765 
    766 static INLINE int frame_is_kf_gf_arf(const VP9_COMP *cpi) {
    767   return frame_is_intra_only(&cpi->common) || cpi->refresh_alt_ref_frame ||
    768          (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref);
    769 }
    770 
    771 static INLINE int get_ref_frame_map_idx(const VP9_COMP *cpi,
    772                                         MV_REFERENCE_FRAME ref_frame) {
    773   if (ref_frame == LAST_FRAME) {
    774     return cpi->lst_fb_idx;
    775   } else if (ref_frame == GOLDEN_FRAME) {
    776     return cpi->gld_fb_idx;
    777   } else {
    778     return cpi->alt_fb_idx;
    779   }
    780 }
    781 
    782 static INLINE int get_ref_frame_buf_idx(const VP9_COMP *const cpi,
    783                                         int ref_frame) {
    784   const VP9_COMMON *const cm = &cpi->common;
    785   const int map_idx = get_ref_frame_map_idx(cpi, ref_frame);
    786   return (map_idx != INVALID_IDX) ? cm->ref_frame_map[map_idx] : INVALID_IDX;
    787 }
    788 
    789 static INLINE YV12_BUFFER_CONFIG *get_ref_frame_buffer(
    790     VP9_COMP *cpi, MV_REFERENCE_FRAME ref_frame) {
    791   VP9_COMMON *const cm = &cpi->common;
    792   const int buf_idx = get_ref_frame_buf_idx(cpi, ref_frame);
    793   return buf_idx != INVALID_IDX ? &cm->buffer_pool->frame_bufs[buf_idx].buf
    794                                 : NULL;
    795 }
    796 
    797 static INLINE int get_token_alloc(int mb_rows, int mb_cols) {
    798   // TODO(JBB): double check we can't exceed this token count if we have a
    799   // 32x32 transform crossing a boundary at a multiple of 16.
    800   // mb_rows, cols are in units of 16 pixels. We assume 3 planes all at full
    801   // resolution. We assume up to 1 token per pixel, and then allow
    802   // a head room of 4.
    803   return mb_rows * mb_cols * (16 * 16 * 3 + 4);
    804 }
    805 
    806 // Get the allocated token size for a tile. It does the same calculation as in
    807 // the frame token allocation.
    808 static INLINE int allocated_tokens(TileInfo tile) {
    809   int tile_mb_rows = (tile.mi_row_end - tile.mi_row_start + 1) >> 1;
    810   int tile_mb_cols = (tile.mi_col_end - tile.mi_col_start + 1) >> 1;
    811 
    812   return get_token_alloc(tile_mb_rows, tile_mb_cols);
    813 }
    814 
    815 static INLINE void get_start_tok(VP9_COMP *cpi, int tile_row, int tile_col,
    816                                  int mi_row, TOKENEXTRA **tok) {
    817   VP9_COMMON *const cm = &cpi->common;
    818   const int tile_cols = 1 << cm->log2_tile_cols;
    819   TileDataEnc *this_tile = &cpi->tile_data[tile_row * tile_cols + tile_col];
    820   const TileInfo *const tile_info = &this_tile->tile_info;
    821 
    822   int tile_mb_cols = (tile_info->mi_col_end - tile_info->mi_col_start + 1) >> 1;
    823   const int mb_row = (mi_row - tile_info->mi_row_start) >> 1;
    824 
    825   *tok =
    826       cpi->tile_tok[tile_row][tile_col] + get_token_alloc(mb_row, tile_mb_cols);
    827 }
    828 
    829 int64_t vp9_get_y_sse(const YV12_BUFFER_CONFIG *a, const YV12_BUFFER_CONFIG *b);
    830 #if CONFIG_VP9_HIGHBITDEPTH
    831 int64_t vp9_highbd_get_y_sse(const YV12_BUFFER_CONFIG *a,
    832                              const YV12_BUFFER_CONFIG *b);
    833 #endif  // CONFIG_VP9_HIGHBITDEPTH
    834 
    835 void vp9_scale_references(VP9_COMP *cpi);
    836 
    837 void vp9_update_reference_frames(VP9_COMP *cpi);
    838 
    839 void vp9_set_high_precision_mv(VP9_COMP *cpi, int allow_high_precision_mv);
    840 
    841 YV12_BUFFER_CONFIG *vp9_svc_twostage_scale(
    842     VP9_COMMON *cm, YV12_BUFFER_CONFIG *unscaled, YV12_BUFFER_CONFIG *scaled,
    843     YV12_BUFFER_CONFIG *scaled_temp, INTERP_FILTER filter_type,
    844     int phase_scaler, INTERP_FILTER filter_type2, int phase_scaler2);
    845 
    846 YV12_BUFFER_CONFIG *vp9_scale_if_required(
    847     VP9_COMMON *cm, YV12_BUFFER_CONFIG *unscaled, YV12_BUFFER_CONFIG *scaled,
    848     int use_normative_scaler, INTERP_FILTER filter_type, int phase_scaler);
    849 
    850 void vp9_apply_encoding_flags(VP9_COMP *cpi, vpx_enc_frame_flags_t flags);
    851 
    852 static INLINE int is_two_pass_svc(const struct VP9_COMP *const cpi) {
    853   return cpi->use_svc && cpi->oxcf.pass != 0;
    854 }
    855 
    856 static INLINE int is_one_pass_cbr_svc(const struct VP9_COMP *const cpi) {
    857   return (cpi->use_svc && cpi->oxcf.pass == 0);
    858 }
    859 
    860 #if CONFIG_VP9_TEMPORAL_DENOISING
    861 static INLINE int denoise_svc(const struct VP9_COMP *const cpi) {
    862   return (!cpi->use_svc ||
    863           (cpi->use_svc &&
    864            cpi->svc.spatial_layer_id == cpi->svc.number_spatial_layers - 1));
    865 }
    866 #endif
    867 
    868 static INLINE int is_altref_enabled(const VP9_COMP *const cpi) {
    869   return !(cpi->oxcf.mode == REALTIME && cpi->oxcf.rc_mode == VPX_CBR) &&
    870          cpi->oxcf.lag_in_frames > 0 &&
    871          (cpi->oxcf.enable_auto_arf &&
    872           (!is_two_pass_svc(cpi) ||
    873            cpi->oxcf.ss_enable_auto_arf[cpi->svc.spatial_layer_id]));
    874 }
    875 
    876 static INLINE void set_ref_ptrs(VP9_COMMON *cm, MACROBLOCKD *xd,
    877                                 MV_REFERENCE_FRAME ref0,
    878                                 MV_REFERENCE_FRAME ref1) {
    879   xd->block_refs[0] =
    880       &cm->frame_refs[ref0 >= LAST_FRAME ? ref0 - LAST_FRAME : 0];
    881   xd->block_refs[1] =
    882       &cm->frame_refs[ref1 >= LAST_FRAME ? ref1 - LAST_FRAME : 0];
    883 }
    884 
    885 static INLINE int get_chessboard_index(const int frame_index) {
    886   return frame_index & 0x1;
    887 }
    888 
    889 static INLINE int *cond_cost_list(const struct VP9_COMP *cpi, int *cost_list) {
    890   return cpi->sf.mv.subpel_search_method != SUBPEL_TREE ? cost_list : NULL;
    891 }
    892 
    893 static INLINE int get_num_vert_units(TileInfo tile, int shift) {
    894   int num_vert_units =
    895       (tile.mi_row_end - tile.mi_row_start + (1 << shift) - 1) >> shift;
    896   return num_vert_units;
    897 }
    898 
    899 static INLINE int get_num_cols(TileInfo tile, int shift) {
    900   int num_cols =
    901       (tile.mi_col_end - tile.mi_col_start + (1 << shift) - 1) >> shift;
    902   return num_cols;
    903 }
    904 
    905 static INLINE int get_level_index(VP9_LEVEL level) {
    906   int i;
    907   for (i = 0; i < VP9_LEVELS; ++i) {
    908     if (level == vp9_level_defs[i].level) return i;
    909   }
    910   return -1;
    911 }
    912 
    913 VP9_LEVEL vp9_get_level(const Vp9LevelSpec *const level_spec);
    914 
    915 void vp9_new_framerate(VP9_COMP *cpi, double framerate);
    916 
    917 void vp9_set_row_mt(VP9_COMP *cpi);
    918 
    919 #define LAYER_IDS_TO_IDX(sl, tl, num_tl) ((sl) * (num_tl) + (tl))
    920 
    921 #ifdef __cplusplus
    922 }  // extern "C"
    923 #endif
    924 
    925 #endif  // VP9_ENCODER_VP9_ENCODER_H_
    926