Home | History | Annotate | Download | only in encoder
      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_util/vpx_thread.h"
     24 
     25 #include "vp9/common/vp9_alloccommon.h"
     26 #include "vp9/common/vp9_ppflags.h"
     27 #include "vp9/common/vp9_entropymode.h"
     28 #include "vp9/common/vp9_thread_common.h"
     29 #include "vp9/common/vp9_onyxc_int.h"
     30 
     31 #include "vp9/encoder/vp9_aq_cyclicrefresh.h"
     32 #include "vp9/encoder/vp9_context_tree.h"
     33 #include "vp9/encoder/vp9_encodemb.h"
     34 #include "vp9/encoder/vp9_firstpass.h"
     35 #include "vp9/encoder/vp9_lookahead.h"
     36 #include "vp9/encoder/vp9_mbgraph.h"
     37 #include "vp9/encoder/vp9_mcomp.h"
     38 #include "vp9/encoder/vp9_quantize.h"
     39 #include "vp9/encoder/vp9_ratectrl.h"
     40 #include "vp9/encoder/vp9_rd.h"
     41 #include "vp9/encoder/vp9_speed_features.h"
     42 #include "vp9/encoder/vp9_svc_layercontext.h"
     43 #include "vp9/encoder/vp9_tokenize.h"
     44 
     45 #if CONFIG_VP9_TEMPORAL_DENOISING
     46 #include "vp9/encoder/vp9_denoiser.h"
     47 #endif
     48 
     49 #ifdef __cplusplus
     50 extern "C" {
     51 #endif
     52 
     53 typedef struct {
     54   int nmvjointcost[MV_JOINTS];
     55   int nmvcosts[2][MV_VALS];
     56   int nmvcosts_hp[2][MV_VALS];
     57 
     58   vpx_prob segment_pred_probs[PREDICTION_PROBS];
     59 
     60   unsigned char *last_frame_seg_map_copy;
     61 
     62   // 0 = Intra, Last, GF, ARF
     63   signed char last_ref_lf_deltas[MAX_REF_LF_DELTAS];
     64   // 0 = ZERO_MV, MV
     65   signed char last_mode_lf_deltas[MAX_MODE_LF_DELTAS];
     66 
     67   FRAME_CONTEXT fc;
     68 } CODING_CONTEXT;
     69 
     70 
     71 typedef enum {
     72   // encode_breakout is disabled.
     73   ENCODE_BREAKOUT_DISABLED = 0,
     74   // encode_breakout is enabled.
     75   ENCODE_BREAKOUT_ENABLED = 1,
     76   // encode_breakout is enabled with small max_thresh limit.
     77   ENCODE_BREAKOUT_LIMITED = 2
     78 } ENCODE_BREAKOUT_TYPE;
     79 
     80 typedef enum {
     81   NORMAL      = 0,
     82   FOURFIVE    = 1,
     83   THREEFIVE   = 2,
     84   ONETWO      = 3
     85 } VPX_SCALING;
     86 
     87 typedef enum {
     88   // Good Quality Fast Encoding. The encoder balances quality with the amount of
     89   // time it takes to encode the output. Speed setting controls how fast.
     90   GOOD,
     91 
     92   // The encoder places priority on the quality of the output over encoding
     93   // speed. The output is compressed at the highest possible quality. This
     94   // option takes the longest amount of time to encode. Speed setting ignored.
     95   BEST,
     96 
     97   // Realtime/Live Encoding. This mode is optimized for realtime encoding (for
     98   // example, capturing a television signal or feed from a live camera). Speed
     99   // setting controls how fast.
    100   REALTIME
    101 } MODE;
    102 
    103 typedef enum {
    104   FRAMEFLAGS_KEY    = 1 << 0,
    105   FRAMEFLAGS_GOLDEN = 1 << 1,
    106   FRAMEFLAGS_ALTREF = 1 << 2,
    107 } FRAMETYPE_FLAGS;
    108 
    109 typedef enum {
    110   NO_AQ = 0,
    111   VARIANCE_AQ = 1,
    112   COMPLEXITY_AQ = 2,
    113   CYCLIC_REFRESH_AQ = 3,
    114   AQ_MODE_COUNT  // This should always be the last member of the enum
    115 } AQ_MODE;
    116 
    117 typedef enum {
    118   RESIZE_NONE = 0,    // No frame resizing allowed (except for SVC).
    119   RESIZE_FIXED = 1,   // All frames are coded at the specified dimension.
    120   RESIZE_DYNAMIC = 2  // Coded size of each frame is determined by the codec.
    121 } RESIZE_TYPE;
    122 
    123 typedef struct VP9EncoderConfig {
    124   BITSTREAM_PROFILE profile;
    125   vpx_bit_depth_t bit_depth;     // Codec bit-depth.
    126   int width;  // width of data passed to the compressor
    127   int height;  // height of data passed to the compressor
    128   unsigned int input_bit_depth;  // Input bit depth.
    129   double init_framerate;  // set to passed in framerate
    130   int64_t target_bandwidth;  // bandwidth to be used in kilobits per second
    131 
    132   int noise_sensitivity;  // pre processing blur: recommendation 0
    133   int sharpness;  // sharpening output: recommendation 0:
    134   int speed;
    135   // maximum allowed bitrate for any intra frame in % of bitrate target.
    136   unsigned int rc_max_intra_bitrate_pct;
    137   // maximum allowed bitrate for any inter frame in % of bitrate target.
    138   unsigned int rc_max_inter_bitrate_pct;
    139   // percent of rate boost for golden frame in CBR mode.
    140   unsigned int gf_cbr_boost_pct;
    141 
    142   MODE mode;
    143   int pass;
    144 
    145   // Key Framing Operations
    146   int auto_key;  // autodetect cut scenes and set the keyframes
    147   int key_freq;  // maximum distance to key frame.
    148 
    149   int lag_in_frames;  // how many frames lag before we start encoding
    150 
    151   // ----------------------------------------------------------------
    152   // DATARATE CONTROL OPTIONS
    153 
    154   // vbr, cbr, constrained quality or constant quality
    155   enum vpx_rc_mode rc_mode;
    156 
    157   // buffer targeting aggressiveness
    158   int under_shoot_pct;
    159   int over_shoot_pct;
    160 
    161   // buffering parameters
    162   int64_t starting_buffer_level_ms;
    163   int64_t optimal_buffer_level_ms;
    164   int64_t maximum_buffer_size_ms;
    165 
    166   // Frame drop threshold.
    167   int drop_frames_water_mark;
    168 
    169   // controlling quality
    170   int fixed_q;
    171   int worst_allowed_q;
    172   int best_allowed_q;
    173   int cq_level;
    174   AQ_MODE aq_mode;  // Adaptive Quantization mode
    175 
    176   // Internal frame size scaling.
    177   RESIZE_TYPE resize_mode;
    178   int scaled_frame_width;
    179   int scaled_frame_height;
    180 
    181   // Enable feature to reduce the frame quantization every x frames.
    182   int frame_periodic_boost;
    183 
    184   // two pass datarate control
    185   int two_pass_vbrbias;        // two pass datarate control tweaks
    186   int two_pass_vbrmin_section;
    187   int two_pass_vbrmax_section;
    188   // END DATARATE CONTROL OPTIONS
    189   // ----------------------------------------------------------------
    190 
    191   // Spatial and temporal scalability.
    192   int ss_number_layers;  // Number of spatial layers.
    193   int ts_number_layers;  // Number of temporal layers.
    194   // Bitrate allocation for spatial layers.
    195   int layer_target_bitrate[VPX_MAX_LAYERS];
    196   int ss_target_bitrate[VPX_SS_MAX_LAYERS];
    197   int ss_enable_auto_arf[VPX_SS_MAX_LAYERS];
    198   // Bitrate allocation (CBR mode) and framerate factor, for temporal layers.
    199   int ts_rate_decimator[VPX_TS_MAX_LAYERS];
    200 
    201   int enable_auto_arf;
    202 
    203   int encode_breakout;  // early breakout : for video conf recommend 800
    204 
    205   /* Bitfield defining the error resiliency features to enable.
    206    * Can provide decodable frames after losses in previous
    207    * frames and decodable partitions after losses in the same frame.
    208    */
    209   unsigned int error_resilient_mode;
    210 
    211   /* Bitfield defining the parallel decoding mode where the
    212    * decoding in successive frames may be conducted in parallel
    213    * just by decoding the frame headers.
    214    */
    215   unsigned int frame_parallel_decoding_mode;
    216 
    217   int arnr_max_frames;
    218   int arnr_strength;
    219 
    220   int min_gf_interval;
    221   int max_gf_interval;
    222 
    223   int tile_columns;
    224   int tile_rows;
    225 
    226   int max_threads;
    227 
    228   vpx_fixed_buf_t two_pass_stats_in;
    229   struct vpx_codec_pkt_list *output_pkt_list;
    230 
    231 #if CONFIG_FP_MB_STATS
    232   vpx_fixed_buf_t firstpass_mb_stats_in;
    233 #endif
    234 
    235   vp8e_tuning tuning;
    236   vp9e_tune_content content;
    237 #if CONFIG_VP9_HIGHBITDEPTH
    238   int use_highbitdepth;
    239 #endif
    240   vpx_color_space_t color_space;
    241   vpx_color_range_t color_range;
    242   int render_width;
    243   int render_height;
    244   VP9E_TEMPORAL_LAYERING_MODE temporal_layering_mode;
    245 } VP9EncoderConfig;
    246 
    247 static INLINE int is_lossless_requested(const VP9EncoderConfig *cfg) {
    248   return cfg->best_allowed_q == 0 && cfg->worst_allowed_q == 0;
    249 }
    250 
    251 // TODO(jingning) All spatially adaptive variables should go to TileDataEnc.
    252 typedef struct TileDataEnc {
    253   TileInfo tile_info;
    254   int thresh_freq_fact[BLOCK_SIZES][MAX_MODES];
    255   int mode_map[BLOCK_SIZES][MAX_MODES];
    256 } TileDataEnc;
    257 
    258 typedef struct RD_COUNTS {
    259   vp9_coeff_count coef_counts[TX_SIZES][PLANE_TYPES];
    260   int64_t comp_pred_diff[REFERENCE_MODES];
    261   int64_t filter_diff[SWITCHABLE_FILTER_CONTEXTS];
    262 } RD_COUNTS;
    263 
    264 typedef struct ThreadData {
    265   MACROBLOCK mb;
    266   RD_COUNTS rd_counts;
    267   FRAME_COUNTS *counts;
    268 
    269   PICK_MODE_CONTEXT *leaf_tree;
    270   PC_TREE *pc_tree;
    271   PC_TREE *pc_root;
    272 } ThreadData;
    273 
    274 struct EncWorkerData;
    275 
    276 typedef struct ActiveMap {
    277   int enabled;
    278   int update;
    279   unsigned char *map;
    280 } ActiveMap;
    281 
    282 typedef enum {
    283   Y,
    284   U,
    285   V,
    286   ALL
    287 } STAT_TYPE;
    288 
    289 typedef struct IMAGE_STAT {
    290   double stat[ALL+1];
    291   double worst;
    292 } ImageStat;
    293 
    294 typedef struct VP9_COMP {
    295   QUANTS quants;
    296   ThreadData td;
    297   MB_MODE_INFO_EXT *mbmi_ext_base;
    298   DECLARE_ALIGNED(16, int16_t, y_dequant[QINDEX_RANGE][8]);
    299   DECLARE_ALIGNED(16, int16_t, uv_dequant[QINDEX_RANGE][8]);
    300   VP9_COMMON common;
    301   VP9EncoderConfig oxcf;
    302   struct lookahead_ctx    *lookahead;
    303   struct lookahead_entry  *alt_ref_source;
    304 
    305   YV12_BUFFER_CONFIG *Source;
    306   YV12_BUFFER_CONFIG *Last_Source;  // NULL for first frame and alt_ref frames
    307   YV12_BUFFER_CONFIG *un_scaled_source;
    308   YV12_BUFFER_CONFIG scaled_source;
    309   YV12_BUFFER_CONFIG *unscaled_last_source;
    310   YV12_BUFFER_CONFIG scaled_last_source;
    311 
    312   TileDataEnc *tile_data;
    313   int allocated_tiles;  // Keep track of memory allocated for tiles.
    314 
    315   // For a still frame, this flag is set to 1 to skip partition search.
    316   int partition_search_skippable_frame;
    317 
    318   int scaled_ref_idx[MAX_REF_FRAMES];
    319   int lst_fb_idx;
    320   int gld_fb_idx;
    321   int alt_fb_idx;
    322 
    323   int refresh_last_frame;
    324   int refresh_golden_frame;
    325   int refresh_alt_ref_frame;
    326 
    327   int ext_refresh_frame_flags_pending;
    328   int ext_refresh_last_frame;
    329   int ext_refresh_golden_frame;
    330   int ext_refresh_alt_ref_frame;
    331 
    332   int ext_refresh_frame_context_pending;
    333   int ext_refresh_frame_context;
    334 
    335   YV12_BUFFER_CONFIG last_frame_uf;
    336 
    337   TOKENEXTRA *tile_tok[4][1 << 6];
    338   unsigned int tok_count[4][1 << 6];
    339 
    340   // Ambient reconstruction err target for force key frames
    341   int64_t ambient_err;
    342 
    343   RD_OPT rd;
    344 
    345   CODING_CONTEXT coding_context;
    346 
    347   int *nmvcosts[2];
    348   int *nmvcosts_hp[2];
    349   int *nmvsadcosts[2];
    350   int *nmvsadcosts_hp[2];
    351 
    352   int64_t last_time_stamp_seen;
    353   int64_t last_end_time_stamp_seen;
    354   int64_t first_time_stamp_ever;
    355 
    356   RATE_CONTROL rc;
    357   double framerate;
    358 
    359   int interp_filter_selected[MAX_REF_FRAMES][SWITCHABLE];
    360 
    361   struct vpx_codec_pkt_list  *output_pkt_list;
    362 
    363   MBGRAPH_FRAME_STATS mbgraph_stats[MAX_LAG_BUFFERS];
    364   int mbgraph_n_frames;             // number of frames filled in the above
    365   int static_mb_pct;                // % forced skip mbs by segmentation
    366   int ref_frame_flags;
    367 
    368   SPEED_FEATURES sf;
    369 
    370   unsigned int max_mv_magnitude;
    371   int mv_step_param;
    372 
    373   int allow_comp_inter_inter;
    374 
    375   // Default value is 1. From first pass stats, encode_breakout may be disabled.
    376   ENCODE_BREAKOUT_TYPE allow_encode_breakout;
    377 
    378   // Get threshold from external input. A suggested threshold is 800 for HD
    379   // clips, and 300 for < HD clips.
    380   int encode_breakout;
    381 
    382   unsigned char *segmentation_map;
    383 
    384   // segment threashold for encode breakout
    385   int  segment_encode_breakout[MAX_SEGMENTS];
    386 
    387   CYCLIC_REFRESH *cyclic_refresh;
    388   ActiveMap active_map;
    389 
    390   fractional_mv_step_fp *find_fractional_mv_step;
    391   vp9_full_search_fn_t full_search_sad;
    392   vp9_diamond_search_fn_t diamond_search_sad;
    393   vp9_variance_fn_ptr_t fn_ptr[BLOCK_SIZES];
    394   uint64_t time_receive_data;
    395   uint64_t time_compress_data;
    396   uint64_t time_pick_lpf;
    397   uint64_t time_encode_sb_row;
    398 
    399 #if CONFIG_FP_MB_STATS
    400   int use_fp_mb_stats;
    401 #endif
    402 
    403   TWO_PASS twopass;
    404 
    405   YV12_BUFFER_CONFIG alt_ref_buffer;
    406 
    407 
    408 #if CONFIG_INTERNAL_STATS
    409   unsigned int mode_chosen_counts[MAX_MODES];
    410 
    411   int    count;
    412   uint64_t total_sq_error;
    413   uint64_t total_samples;
    414   ImageStat psnr;
    415 
    416   uint64_t totalp_sq_error;
    417   uint64_t totalp_samples;
    418   ImageStat psnrp;
    419 
    420   double total_blockiness;
    421   double worst_blockiness;
    422 
    423   int    bytes;
    424   double summed_quality;
    425   double summed_weights;
    426   double summedp_quality;
    427   double summedp_weights;
    428   unsigned int tot_recode_hits;
    429   double worst_ssim;
    430 
    431   ImageStat ssimg;
    432   ImageStat fastssim;
    433   ImageStat psnrhvs;
    434 
    435   int b_calculate_ssimg;
    436   int b_calculate_blockiness;
    437 
    438   int b_calculate_consistency;
    439 
    440   double total_inconsistency;
    441   double worst_consistency;
    442   Ssimv *ssim_vars;
    443   Metrics metrics;
    444 #endif
    445   int b_calculate_psnr;
    446 
    447   int droppable;
    448 
    449   int initial_width;
    450   int initial_height;
    451   int initial_mbs;  // Number of MBs in the full-size frame; to be used to
    452                     // normalize the firstpass stats. This will differ from the
    453                     // number of MBs in the current frame when the frame is
    454                     // scaled.
    455 
    456   int use_svc;
    457 
    458   SVC svc;
    459 
    460   // Store frame variance info in SOURCE_VAR_BASED_PARTITION search type.
    461   diff *source_diff_var;
    462   // The threshold used in SOURCE_VAR_BASED_PARTITION search type.
    463   unsigned int source_var_thresh;
    464   int frames_till_next_var_check;
    465 
    466   int frame_flags;
    467 
    468   search_site_config ss_cfg;
    469 
    470   int mbmode_cost[INTRA_MODES];
    471   unsigned int inter_mode_cost[INTER_MODE_CONTEXTS][INTER_MODES];
    472   int intra_uv_mode_cost[FRAME_TYPES][INTRA_MODES];
    473   int y_mode_costs[INTRA_MODES][INTRA_MODES][INTRA_MODES];
    474   int switchable_interp_costs[SWITCHABLE_FILTER_CONTEXTS][SWITCHABLE_FILTERS];
    475   int partition_cost[PARTITION_CONTEXTS][PARTITION_TYPES];
    476 
    477   int multi_arf_allowed;
    478   int multi_arf_enabled;
    479   int multi_arf_last_grp_enabled;
    480 
    481 #if CONFIG_VP9_TEMPORAL_DENOISING
    482   VP9_DENOISER denoiser;
    483 #endif
    484 
    485   int resize_pending;
    486   int resize_state;
    487   int resize_scale_num;
    488   int resize_scale_den;
    489   int resize_avg_qp;
    490   int resize_buffer_underflow;
    491   int resize_count;
    492 
    493   // VAR_BASED_PARTITION thresholds
    494   // 0 - threshold_64x64; 1 - threshold_32x32;
    495   // 2 - threshold_16x16; 3 - vbp_threshold_8x8;
    496   int64_t vbp_thresholds[4];
    497   int64_t vbp_threshold_minmax;
    498   int64_t vbp_threshold_sad;
    499   BLOCK_SIZE vbp_bsize_min;
    500 
    501   // Multi-threading
    502   int num_workers;
    503   VPxWorker *workers;
    504   struct EncWorkerData *tile_thr_data;
    505   VP9LfSync lf_row_sync;
    506 } VP9_COMP;
    507 
    508 void vp9_initialize_enc(void);
    509 
    510 struct VP9_COMP *vp9_create_compressor(VP9EncoderConfig *oxcf,
    511                                        BufferPool *const pool);
    512 void vp9_remove_compressor(VP9_COMP *cpi);
    513 
    514 void vp9_change_config(VP9_COMP *cpi, const VP9EncoderConfig *oxcf);
    515 
    516   // receive a frames worth of data. caller can assume that a copy of this
    517   // frame is made and not just a copy of the pointer..
    518 int vp9_receive_raw_frame(VP9_COMP *cpi, unsigned int frame_flags,
    519                           YV12_BUFFER_CONFIG *sd, int64_t time_stamp,
    520                           int64_t end_time_stamp);
    521 
    522 int vp9_get_compressed_data(VP9_COMP *cpi, unsigned int *frame_flags,
    523                             size_t *size, uint8_t *dest,
    524                             int64_t *time_stamp, int64_t *time_end, int flush);
    525 
    526 int vp9_get_preview_raw_frame(VP9_COMP *cpi, YV12_BUFFER_CONFIG *dest,
    527                               vp9_ppflags_t *flags);
    528 
    529 int vp9_use_as_reference(VP9_COMP *cpi, int ref_frame_flags);
    530 
    531 void vp9_update_reference(VP9_COMP *cpi, int ref_frame_flags);
    532 
    533 int vp9_copy_reference_enc(VP9_COMP *cpi, VP9_REFFRAME ref_frame_flag,
    534                            YV12_BUFFER_CONFIG *sd);
    535 
    536 int vp9_set_reference_enc(VP9_COMP *cpi, VP9_REFFRAME ref_frame_flag,
    537                           YV12_BUFFER_CONFIG *sd);
    538 
    539 int vp9_update_entropy(VP9_COMP *cpi, int update);
    540 
    541 int vp9_set_active_map(VP9_COMP *cpi, unsigned char *map, int rows, int cols);
    542 
    543 int vp9_get_active_map(VP9_COMP *cpi, unsigned char *map, int rows, int cols);
    544 
    545 int vp9_set_internal_size(VP9_COMP *cpi,
    546                           VPX_SCALING horiz_mode, VPX_SCALING vert_mode);
    547 
    548 int vp9_set_size_literal(VP9_COMP *cpi, unsigned int width,
    549                          unsigned int height);
    550 
    551 void vp9_set_svc(VP9_COMP *cpi, int use_svc);
    552 
    553 int vp9_get_quantizer(struct VP9_COMP *cpi);
    554 
    555 static INLINE int frame_is_kf_gf_arf(const VP9_COMP *cpi) {
    556   return frame_is_intra_only(&cpi->common) ||
    557          cpi->refresh_alt_ref_frame ||
    558          (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref);
    559 }
    560 
    561 static INLINE int get_ref_frame_map_idx(const VP9_COMP *cpi,
    562                                         MV_REFERENCE_FRAME ref_frame) {
    563   if (ref_frame == LAST_FRAME) {
    564     return cpi->lst_fb_idx;
    565   } else if (ref_frame == GOLDEN_FRAME) {
    566     return cpi->gld_fb_idx;
    567   } else {
    568     return cpi->alt_fb_idx;
    569   }
    570 }
    571 
    572 static INLINE int get_ref_frame_buf_idx(const VP9_COMP *const cpi,
    573                                         int ref_frame) {
    574   const VP9_COMMON *const cm = &cpi->common;
    575   const int map_idx = get_ref_frame_map_idx(cpi, ref_frame);
    576   return (map_idx != INVALID_IDX) ? cm->ref_frame_map[map_idx] : INVALID_IDX;
    577 }
    578 
    579 static INLINE YV12_BUFFER_CONFIG *get_ref_frame_buffer(
    580     VP9_COMP *cpi, MV_REFERENCE_FRAME ref_frame) {
    581   VP9_COMMON *const cm = &cpi->common;
    582   const int buf_idx = get_ref_frame_buf_idx(cpi, ref_frame);
    583   return
    584       buf_idx != INVALID_IDX ? &cm->buffer_pool->frame_bufs[buf_idx].buf : NULL;
    585 }
    586 
    587 static INLINE int get_token_alloc(int mb_rows, int mb_cols) {
    588   // TODO(JBB): double check we can't exceed this token count if we have a
    589   // 32x32 transform crossing a boundary at a multiple of 16.
    590   // mb_rows, cols are in units of 16 pixels. We assume 3 planes all at full
    591   // resolution. We assume up to 1 token per pixel, and then allow
    592   // a head room of 4.
    593   return mb_rows * mb_cols * (16 * 16 * 3 + 4);
    594 }
    595 
    596 // Get the allocated token size for a tile. It does the same calculation as in
    597 // the frame token allocation.
    598 static INLINE int allocated_tokens(TileInfo tile) {
    599   int tile_mb_rows = (tile.mi_row_end - tile.mi_row_start + 1) >> 1;
    600   int tile_mb_cols = (tile.mi_col_end - tile.mi_col_start + 1) >> 1;
    601 
    602   return get_token_alloc(tile_mb_rows, tile_mb_cols);
    603 }
    604 
    605 int64_t vp9_get_y_sse(const YV12_BUFFER_CONFIG *a, const YV12_BUFFER_CONFIG *b);
    606 #if CONFIG_VP9_HIGHBITDEPTH
    607 int64_t vp9_highbd_get_y_sse(const YV12_BUFFER_CONFIG *a,
    608                              const YV12_BUFFER_CONFIG *b);
    609 #endif  // CONFIG_VP9_HIGHBITDEPTH
    610 
    611 void vp9_scale_references(VP9_COMP *cpi);
    612 
    613 void vp9_update_reference_frames(VP9_COMP *cpi);
    614 
    615 void vp9_set_high_precision_mv(VP9_COMP *cpi, int allow_high_precision_mv);
    616 
    617 YV12_BUFFER_CONFIG *vp9_scale_if_required(VP9_COMMON *cm,
    618                                           YV12_BUFFER_CONFIG *unscaled,
    619                                           YV12_BUFFER_CONFIG *scaled,
    620                                           int use_normative_scaler);
    621 
    622 void vp9_apply_encoding_flags(VP9_COMP *cpi, vpx_enc_frame_flags_t flags);
    623 
    624 static INLINE int is_two_pass_svc(const struct VP9_COMP *const cpi) {
    625   return cpi->use_svc && cpi->oxcf.pass != 0;
    626 }
    627 
    628 static INLINE int is_one_pass_cbr_svc(const struct VP9_COMP *const cpi) {
    629   return (cpi->use_svc && cpi->oxcf.pass == 0);
    630 }
    631 
    632 static INLINE int is_altref_enabled(const VP9_COMP *const cpi) {
    633   return cpi->oxcf.mode != REALTIME && cpi->oxcf.lag_in_frames > 0 &&
    634          (cpi->oxcf.enable_auto_arf &&
    635           (!is_two_pass_svc(cpi) ||
    636            cpi->oxcf.ss_enable_auto_arf[cpi->svc.spatial_layer_id]));
    637 }
    638 
    639 static INLINE void set_ref_ptrs(VP9_COMMON *cm, MACROBLOCKD *xd,
    640                                 MV_REFERENCE_FRAME ref0,
    641                                 MV_REFERENCE_FRAME ref1) {
    642   xd->block_refs[0] = &cm->frame_refs[ref0 >= LAST_FRAME ? ref0 - LAST_FRAME
    643                                                          : 0];
    644   xd->block_refs[1] = &cm->frame_refs[ref1 >= LAST_FRAME ? ref1 - LAST_FRAME
    645                                                          : 0];
    646 }
    647 
    648 static INLINE int get_chessboard_index(const int frame_index) {
    649   return frame_index & 0x1;
    650 }
    651 
    652 static INLINE int *cond_cost_list(const struct VP9_COMP *cpi, int *cost_list) {
    653   return cpi->sf.mv.subpel_search_method != SUBPEL_TREE ? cost_list : NULL;
    654 }
    655 
    656 void vp9_new_framerate(VP9_COMP *cpi, double framerate);
    657 
    658 #define LAYER_IDS_TO_IDX(sl, tl, num_tl) ((sl) * (num_tl) + (tl))
    659 
    660 #ifdef __cplusplus
    661 }  // extern "C"
    662 #endif
    663 
    664 #endif  // VP9_ENCODER_VP9_ENCODER_H_
    665