vp9_onyx_if.c 126 KB
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/*
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 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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 *
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 *  Use of this source code is governed by a BSD-style license
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 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
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 *  in the file PATENTS.  All contributing project authors may
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 *  be found in the AUTHORS file in the root of the source tree.
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 */


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#include "vpx_config.h"
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#include "vp9/common/vp9_filter.h"
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#include "vp9/common/vp9_onyxc_int.h"
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#include "vp9/common/vp9_reconinter.h"
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#include "vp9/encoder/vp9_onyx_int.h"
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#include "vp9/common/vp9_systemdependent.h"
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#include "vp9/encoder/vp9_quantize.h"
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#include "vp9/common/vp9_alloccommon.h"
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#include "vp9/encoder/vp9_mcomp.h"
#include "vp9/encoder/vp9_firstpass.h"
#include "vp9/encoder/vp9_psnr.h"
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#include "vpx_scale/vpx_scale.h"
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#include "vp9/common/vp9_extend.h"
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#include "vp9/encoder/vp9_ratectrl.h"
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#include "vp9/common/vp9_quant_common.h"
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#include "vp9/common/vp9_tile_common.h"
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#include "vp9/encoder/vp9_segmentation.h"
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#include "./vp9_rtcd.h"
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#include "./vpx_scale_rtcd.h"
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#if CONFIG_POSTPROC
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#include "vp9/common/vp9_postproc.h"
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#endif
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#include "vpx_mem/vpx_mem.h"
#include "vpx_ports/vpx_timer.h"
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#include "vp9/common/vp9_seg_common.h"
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#include "vp9/encoder/vp9_mbgraph.h"
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#include "vp9/common/vp9_pred_common.h"
#include "vp9/encoder/vp9_rdopt.h"
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#include "vp9/encoder/vp9_bitstream.h"
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#include "vp9/encoder/vp9_picklpf.h"
#include "vp9/common/vp9_mvref_common.h"
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#include "vp9/encoder/vp9_temporal_filter.h"
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#include <math.h>
#include <stdio.h>
#include <limits.h>

extern void print_tree_update_probs();
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static void set_default_lf_deltas(VP9_COMP *cpi);
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#define DEFAULT_INTERP_FILTER SWITCHABLE

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#define SEARCH_BEST_FILTER 0            /* to search exhaustively for
                                           best filter */
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#define RESET_FOREACH_FILTER 0          /* whether to reset the encoder state
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                                           before trying each new filter */
#define SHARP_FILTER_QTHRESH 0          /* Q threshold for 8-tap sharp filter */

#define ALTREF_HIGH_PRECISION_MV 1      /* whether to use high precision mv
                                           for altref computation */
#define HIGH_PRECISION_MV_QTHRESH 200   /* Q threshold for use of high precision
                                           mv. Choose a very high value for
                                           now so that HIGH_PRECISION is always
                                           chosen */
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#if CONFIG_INTERNAL_STATS
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#include "math.h"

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extern double vp9_calc_ssim(YV12_BUFFER_CONFIG *source,
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                            YV12_BUFFER_CONFIG *dest, int lumamask,
                            double *weight);
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extern double vp9_calc_ssimg(YV12_BUFFER_CONFIG *source,
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                             YV12_BUFFER_CONFIG *dest, double *ssim_y,
                             double *ssim_u, double *ssim_v);
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#endif

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// #define OUTPUT_YUV_REC
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#ifdef OUTPUT_YUV_SRC
FILE *yuv_file;
#endif
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#ifdef OUTPUT_YUV_REC
FILE *yuv_rec_file;
#endif
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#if 0
FILE *framepsnr;
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FILE *kf_list;
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FILE *keyfile;
#endif

#if 0
extern int skip_true_count;
extern int skip_false_count;
#endif


#ifdef ENTROPY_STATS
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extern int intra_mode_stats[VP9_INTRA_MODES]
                           [VP9_INTRA_MODES]
                           [VP9_INTRA_MODES];
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#endif

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#ifdef NMV_STATS
extern void init_nmvstats();
extern void print_nmvstats();
#endif

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#ifdef SPEEDSTATS
unsigned int frames_at_speed[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
#endif

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#if defined(SECTIONBITS_OUTPUT)
extern unsigned __int64 Sectionbits[500];
#endif
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extern void vp9_init_quantizer(VP9_COMP *cpi);
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static int base_skip_false_prob[QINDEX_RANGE][3];
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// Tables relating active max Q to active min Q
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static int kf_low_motion_minq[QINDEX_RANGE];
static int kf_high_motion_minq[QINDEX_RANGE];
static int gf_low_motion_minq[QINDEX_RANGE];
static int gf_high_motion_minq[QINDEX_RANGE];
static int inter_minq[QINDEX_RANGE];

// Functions to compute the active minq lookup table entries based on a
// formulaic approach to facilitate easier adjustment of the Q tables.
// The formulae were derived from computing a 3rd order polynomial best
// fit to the original data (after plotting real maxq vs minq (not q index))
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static int calculate_minq_index(double maxq,
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                                double x3, double x2, double x1, double c) {
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  int i;
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  const double minqtarget = MIN(((x3 * maxq + x2) * maxq + x1) * maxq + c,
                                maxq);
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  // Special case handling to deal with the step from q2.0
  // down to lossless mode represented by q 1.0.
  if (minqtarget <= 2.0)
    return 0;

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  for (i = 0; i < QINDEX_RANGE; i++) {
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    if (minqtarget <= vp9_convert_qindex_to_q(i))
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      return i;
  }
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  return QINDEX_RANGE - 1;
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}
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static void init_minq_luts(void) {
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  int i;

  for (i = 0; i < QINDEX_RANGE; i++) {
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    const double maxq = vp9_convert_qindex_to_q(i);
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    kf_low_motion_minq[i] = calculate_minq_index(maxq,
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                                                 0.000001,
                                                 -0.0004,
                                                 0.15,
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                                                 0.0);
    kf_high_motion_minq[i] = calculate_minq_index(maxq,
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                                                  0.000002,
                                                  -0.0012,
                                                  0.5,
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                                                  0.0);
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    gf_low_motion_minq[i] = calculate_minq_index(maxq,
                                                 0.0000015,
                                                 -0.0009,
                                                 0.33,
                                                 0.0);
    gf_high_motion_minq[i] = calculate_minq_index(maxq,
                                                  0.0000021,
                                                  -0.00125,
                                                  0.45,
                                                  0.0);
    inter_minq[i] = calculate_minq_index(maxq,
                                         0.00000271,
                                         -0.00113,
                                         0.697,
                                         0.0);

  }
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}
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static void set_mvcost(MACROBLOCK *mb) {
  if (mb->e_mbd.allow_high_precision_mv) {
    mb->mvcost = mb->nmvcost_hp;
    mb->mvsadcost = mb->nmvsadcost_hp;
  } else {
    mb->mvcost = mb->nmvcost;
    mb->mvsadcost = mb->nmvsadcost;
  }
}
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static void init_base_skip_probs(void) {
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  int i;
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  for (i = 0; i < QINDEX_RANGE; i++) {
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    const double q = vp9_convert_qindex_to_q(i);
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    // Exponential decay caluclation of baseline skip prob with clamping
    // Based on crude best fit of old table.
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    const int t = (int)(564.25 * pow(2.71828, (-0.012 * q)));
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    base_skip_false_prob[i][1] = clip_prob(t);
    base_skip_false_prob[i][2] = clip_prob(t * 3 / 4);
    base_skip_false_prob[i][0] = clip_prob(t * 5 / 4);
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  }
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}
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static void update_base_skip_probs(VP9_COMP *cpi) {
  VP9_COMMON *cm = &cpi->common;
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  int k;
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  if (cm->frame_type != KEY_FRAME) {
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    vp9_update_skip_probs(cpi);
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    if (cpi->refresh_alt_ref_frame) {
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      for (k = 0; k < MBSKIP_CONTEXTS; ++k)
        cpi->last_skip_false_probs[2][k] = cm->mbskip_pred_probs[k];
      cpi->last_skip_probs_q[2] = cm->base_qindex;
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    } else if (cpi->refresh_golden_frame) {
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      for (k = 0; k < MBSKIP_CONTEXTS; ++k)
        cpi->last_skip_false_probs[1][k] = cm->mbskip_pred_probs[k];
      cpi->last_skip_probs_q[1] = cm->base_qindex;
    } else {
      for (k = 0; k < MBSKIP_CONTEXTS; ++k)
        cpi->last_skip_false_probs[0][k] = cm->mbskip_pred_probs[k];
      cpi->last_skip_probs_q[0] = cm->base_qindex;
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      // update the baseline table for the current q
      for (k = 0; k < MBSKIP_CONTEXTS; ++k)
        cpi->base_skip_false_prob[cm->base_qindex][k] =
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            cm->mbskip_pred_probs[k];
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    }
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  }
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}
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void vp9_initialize_enc() {
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  static int init_done = 0;

  if (!init_done) {
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    vp9_initialize_common();
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    vp9_tokenize_initialize();
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    vp9_init_quant_tables();
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    vp9_init_me_luts();
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    init_minq_luts();
    init_base_skip_probs();
    init_done = 1;
  }
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}

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static void setup_features(VP9_COMP *cpi) {
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  MACROBLOCKD *xd = &cpi->mb.e_mbd;
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  // Set up default state for MB feature flags
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  xd->segmentation_enabled = 0;
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  xd->update_mb_segmentation_map = 0;
  xd->update_mb_segmentation_data = 0;
  vpx_memset(xd->mb_segment_tree_probs, 255, sizeof(xd->mb_segment_tree_probs));
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  vp9_clearall_segfeatures(xd);
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  xd->mode_ref_lf_delta_enabled = 0;
  xd->mode_ref_lf_delta_update = 0;
  vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas));
  vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas));
  vpx_memset(xd->last_ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas));
  vpx_memset(xd->last_mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas));
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  set_default_lf_deltas(cpi);
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}

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static void dealloc_compressor_data(VP9_COMP *cpi) {
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  // Delete sementation map
  vpx_free(cpi->segmentation_map);
  cpi->segmentation_map = 0;
  vpx_free(cpi->common.last_frame_seg_map);
  cpi->common.last_frame_seg_map = 0;
  vpx_free(cpi->coding_context.last_frame_seg_map_copy);
  cpi->coding_context.last_frame_seg_map_copy = 0;
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  vpx_free(cpi->active_map);
  cpi->active_map = 0;
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  vp9_free_frame_buffers(&cpi->common);
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  vp9_free_frame_buffer(&cpi->last_frame_uf);
  vp9_free_frame_buffer(&cpi->scaled_source);
  vp9_free_frame_buffer(&cpi->alt_ref_buffer);
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  vp9_lookahead_destroy(cpi->lookahead);
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  vpx_free(cpi->tok);
  cpi->tok = 0;
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  // Activity mask based per mb zbin adjustments
  vpx_free(cpi->mb_activity_map);
  cpi->mb_activity_map = 0;
  vpx_free(cpi->mb_norm_activity_map);
  cpi->mb_norm_activity_map = 0;
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  vpx_free(cpi->mb.pip);
  cpi->mb.pip = 0;
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}

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// Computes a q delta (in "q index" terms) to get from a starting q value
// to a target value
// target q value
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static int compute_qdelta(VP9_COMP *cpi, double qstart, double qtarget) {
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  int i;
  int start_index = cpi->worst_quality;
  int target_index = cpi->worst_quality;

  // Convert the average q value to an index.
  for (i = cpi->best_quality; i < cpi->worst_quality; i++) {
    start_index = i;
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    if (vp9_convert_qindex_to_q(i) >= qstart)
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      break;
  }

  // Convert the q target to an index
  for (i = cpi->best_quality; i < cpi->worst_quality; i++) {
    target_index = i;
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    if (vp9_convert_qindex_to_q(i) >= qtarget)
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      break;
  }

  return target_index - start_index;
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}

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static void configure_static_seg_features(VP9_COMP *cpi) {
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  VP9_COMMON *cm = &cpi->common;
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  MACROBLOCKD *xd = &cpi->mb.e_mbd;
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  int high_q = (int)(cpi->avg_q > 48.0);
  int qi_delta;
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  // Disable and clear down for KF
  if (cm->frame_type == KEY_FRAME) {
    // Clear down the global segmentation map
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    vpx_memset(cpi->segmentation_map, 0, cm->mi_rows * cm->mi_cols);
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    xd->update_mb_segmentation_map = 0;
    xd->update_mb_segmentation_data = 0;
    cpi->static_mb_pct = 0;
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    // Disable segmentation
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    vp9_disable_segmentation((VP9_PTR)cpi);
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    // Clear down the segment features.
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    vp9_clearall_segfeatures(xd);
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  } else if (cpi->refresh_alt_ref_frame) {
    // If this is an alt ref frame
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    // Clear down the global segmentation map
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    vpx_memset(cpi->segmentation_map, 0, cm->mi_rows * cm->mi_cols);
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    xd->update_mb_segmentation_map = 0;
    xd->update_mb_segmentation_data = 0;
    cpi->static_mb_pct = 0;
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    // Disable segmentation and individual segment features by default
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    vp9_disable_segmentation((VP9_PTR)cpi);
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    vp9_clearall_segfeatures(xd);
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    // Scan frames from current to arf frame.
    // This function re-enables segmentation if appropriate.
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    vp9_update_mbgraph_stats(cpi);
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    // If segmentation was enabled set those features needed for the
    // arf itself.
    if (xd->segmentation_enabled) {
      xd->update_mb_segmentation_map = 1;
      xd->update_mb_segmentation_data = 1;
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      qi_delta = compute_qdelta(cpi, cpi->avg_q, (cpi->avg_q * 0.875));
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      vp9_set_segdata(xd, 1, SEG_LVL_ALT_Q, (qi_delta - 2));
      vp9_set_segdata(xd, 1, SEG_LVL_ALT_LF, -2);
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      vp9_enable_segfeature(xd, 1, SEG_LVL_ALT_Q);
      vp9_enable_segfeature(xd, 1, SEG_LVL_ALT_LF);
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      // Where relevant assume segment data is delta data
      xd->mb_segment_abs_delta = SEGMENT_DELTADATA;
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    }
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  } else if (xd->segmentation_enabled) {
    // All other frames if segmentation has been enabled

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    // First normal frame in a valid gf or alt ref group
    if (cpi->common.frames_since_golden == 0) {
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      // Set up segment features for normal frames in an arf group
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      if (cpi->source_alt_ref_active) {
        xd->update_mb_segmentation_map = 0;
        xd->update_mb_segmentation_data = 1;
        xd->mb_segment_abs_delta = SEGMENT_DELTADATA;
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        qi_delta = compute_qdelta(cpi, cpi->avg_q,
                                  (cpi->avg_q * 1.125));
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        vp9_set_segdata(xd, 1, SEG_LVL_ALT_Q, (qi_delta + 2));
        vp9_set_segdata(xd, 1, SEG_LVL_ALT_Q, 0);
        vp9_enable_segfeature(xd, 1, SEG_LVL_ALT_Q);
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        vp9_set_segdata(xd, 1, SEG_LVL_ALT_LF, -2);
        vp9_enable_segfeature(xd, 1, SEG_LVL_ALT_LF);
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        // Segment coding disabled for compred testing
        if (high_q || (cpi->static_mb_pct == 100)) {
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          vp9_set_segref(xd, 1, ALTREF_FRAME);
          vp9_enable_segfeature(xd, 1, SEG_LVL_REF_FRAME);
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          vp9_enable_segfeature(xd, 1, SEG_LVL_SKIP);
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        }
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      } else {
        // Disable segmentation and clear down features if alt ref
        // is not active for this group

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        vp9_disable_segmentation((VP9_PTR)cpi);
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        vpx_memset(cpi->segmentation_map, 0, cm->mi_rows * cm->mi_cols);
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        xd->update_mb_segmentation_map = 0;
        xd->update_mb_segmentation_data = 0;
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        vp9_clearall_segfeatures(xd);
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      }
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    } else if (cpi->is_src_frame_alt_ref) {
      // Special case where we are coding over the top of a previous
      // alt ref frame.
      // Segment coding disabled for compred testing
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      // Enable ref frame features for segment 0 as well
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      vp9_enable_segfeature(xd, 0, SEG_LVL_REF_FRAME);
      vp9_enable_segfeature(xd, 1, SEG_LVL_REF_FRAME);
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      // All mbs should use ALTREF_FRAME
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      vp9_clear_segref(xd, 0);
      vp9_set_segref(xd, 0, ALTREF_FRAME);
      vp9_clear_segref(xd, 1);
      vp9_set_segref(xd, 1, ALTREF_FRAME);
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      // Skip all MBs if high Q (0,0 mv and skip coeffs)
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      if (high_q) {
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          vp9_enable_segfeature(xd, 0, SEG_LVL_SKIP);
          vp9_enable_segfeature(xd, 1, SEG_LVL_SKIP);
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      }
      // Enable data udpate
      xd->update_mb_segmentation_data = 1;
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    } else {
      // All other frames.

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      // No updates.. leave things as they are.
      xd->update_mb_segmentation_map = 0;
      xd->update_mb_segmentation_data = 0;
    }
  }
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}

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#ifdef ENTROPY_STATS
void vp9_update_mode_context_stats(VP9_COMP *cpi) {
  VP9_COMMON *cm = &cpi->common;
  int i, j;
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  unsigned int (*inter_mode_counts)[VP9_INTER_MODES - 1][2] =
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      cm->fc.inter_mode_counts;
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  int64_t (*mv_ref_stats)[VP9_INTER_MODES - 1][2] = cpi->mv_ref_stats;
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  FILE *f;

  // Read the past stats counters
  f = fopen("mode_context.bin",  "rb");
  if (!f) {
    vpx_memset(cpi->mv_ref_stats, 0, sizeof(cpi->mv_ref_stats));
  } else {
    fread(cpi->mv_ref_stats, sizeof(cpi->mv_ref_stats), 1, f);
    fclose(f);
  }

  // Add in the values for this frame
  for (i = 0; i < INTER_MODE_CONTEXTS; i++) {
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    for (j = 0; j < VP9_INTER_MODES - 1; j++) {
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      mv_ref_stats[i][j][0] += (int64_t)inter_mode_counts[i][j][0];
      mv_ref_stats[i][j][1] += (int64_t)inter_mode_counts[i][j][1];
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    }
  }

  // Write back the accumulated stats
  f = fopen("mode_context.bin",  "wb");
  fwrite(cpi->mv_ref_stats, sizeof(cpi->mv_ref_stats), 1, f);
  fclose(f);
}

void print_mode_context(VP9_COMP *cpi) {
  FILE *f = fopen("vp9_modecont.c", "a");
  int i, j;

  fprintf(f, "#include \"vp9_entropy.h\"\n");
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  fprintf(
      f,
      "const int inter_mode_probs[INTER_MODE_CONTEXTS][VP9_INTER_MODES - 1] =");
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  fprintf(f, "{\n");
  for (j = 0; j < INTER_MODE_CONTEXTS; j++) {
    fprintf(f, "  {/* %d */ ", j);
    fprintf(f, "    ");
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    for (i = 0; i < VP9_INTER_MODES - 1; i++) {
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      int this_prob;
      int64_t count = cpi->mv_ref_stats[j][i][0] + cpi->mv_ref_stats[j][i][1];
      if (count)
        this_prob = ((cpi->mv_ref_stats[j][i][0] * 256) + (count >> 1)) / count;
      else
        this_prob = 128;

      // context probs
      fprintf(f, "%5d, ", this_prob);
    }
    fprintf(f, "  },\n");
  }

  fprintf(f, "};\n");
  fclose(f);
}
#endif  // ENTROPY_STATS

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// DEBUG: Print out the segment id of each MB in the current frame.
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static void print_seg_map(VP9_COMP *cpi) {
  VP9_COMMON *cm = &cpi->common;
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  int row, col;
  int map_index = 0;
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  FILE *statsfile = fopen("segmap.stt", "a");
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  fprintf(statsfile, "%10d\n", cm->current_video_frame);
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  for (row = 0; row < cpi->common.mi_rows; row++) {
    for (col = 0; col < cpi->common.mi_cols; col++) {
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      fprintf(statsfile, "%10d", cpi->segmentation_map[map_index]);
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      map_index++;
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    }
    fprintf(statsfile, "\n");
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  }
  fprintf(statsfile, "\n");
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  fclose(statsfile);
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}

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static void update_reference_segmentation_map(VP9_COMP *cpi) {
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  VP9_COMMON *const cm = &cpi->common;
  int row, col;
  MODE_INFO *mi, *mi_ptr = cm->mi;
  uint8_t *cache_ptr = cm->last_frame_seg_map, *cache;

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  for (row = 0; row < cm->mi_rows; row++) {
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    mi = mi_ptr;
    cache = cache_ptr;
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    for (col = 0; col < cm->mi_cols; col++, mi++, cache++)
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      cache[0] = mi->mbmi.segment_id;
    mi_ptr += cm->mode_info_stride;
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    cache_ptr += cm->mi_cols;
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  }
}

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static void set_default_lf_deltas(VP9_COMP *cpi) {
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  cpi->mb.e_mbd.mode_ref_lf_delta_enabled = 1;
  cpi->mb.e_mbd.mode_ref_lf_delta_update = 1;
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  vpx_memset(cpi->mb.e_mbd.ref_lf_deltas, 0, sizeof(cpi->mb.e_mbd.ref_lf_deltas));
  vpx_memset(cpi->mb.e_mbd.mode_lf_deltas, 0, sizeof(cpi->mb.e_mbd.mode_lf_deltas));
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  // Test of ref frame deltas
  cpi->mb.e_mbd.ref_lf_deltas[INTRA_FRAME] = 2;
  cpi->mb.e_mbd.ref_lf_deltas[LAST_FRAME] = 0;
  cpi->mb.e_mbd.ref_lf_deltas[GOLDEN_FRAME] = -2;
  cpi->mb.e_mbd.ref_lf_deltas[ALTREF_FRAME] = -2;
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  cpi->mb.e_mbd.mode_lf_deltas[0] = 0;              // Zero
  cpi->mb.e_mbd.mode_lf_deltas[1] = 0;               // New mv
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}

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static void set_rd_speed_thresholds(VP9_COMP *cpi, int mode, int speed) {
  SPEED_FEATURES *sf = &cpi->sf;
  int speed_multiplier = speed + 1;
  int i;

  // Set baseline threshold values
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  for (i = 0; i < MAX_MODES; ++i)
    sf->thresh_mult[i] = mode == 0 ? -500 : 0;
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  sf->thresh_mult[THR_ZEROMV   ] = 0;
  sf->thresh_mult[THR_ZEROG    ] = 0;
  sf->thresh_mult[THR_ZEROA    ] = 0;

  sf->thresh_mult[THR_NEARESTMV] = 0;
  sf->thresh_mult[THR_NEARESTG ] = 0;
  sf->thresh_mult[THR_NEARESTA ] = 0;

  sf->thresh_mult[THR_NEARMV   ] += speed_multiplier * 1000;
  sf->thresh_mult[THR_NEARG    ] += speed_multiplier * 1000;
  sf->thresh_mult[THR_NEARA    ] += speed_multiplier * 1000;

  sf->thresh_mult[THR_DC       ] = 0;
  sf->thresh_mult[THR_TM       ] += speed_multiplier * 1000;
  sf->thresh_mult[THR_V_PRED   ] += speed_multiplier * 1000;
  sf->thresh_mult[THR_H_PRED   ] += speed_multiplier * 1000;
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  sf->thresh_mult[THR_D45_PRED ] += speed_multiplier * 1500;
  sf->thresh_mult[THR_D135_PRED] += speed_multiplier * 1500;
  sf->thresh_mult[THR_D117_PRED] += speed_multiplier * 1500;
  sf->thresh_mult[THR_D153_PRED] += speed_multiplier * 1500;
  sf->thresh_mult[THR_D27_PRED ] += speed_multiplier * 1500;
  sf->thresh_mult[THR_D63_PRED ] += speed_multiplier * 1500;
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  sf->thresh_mult[THR_B_PRED   ] += speed_multiplier * 2500;

  sf->thresh_mult[THR_NEWMV    ] += speed_multiplier * 1000;
  sf->thresh_mult[THR_NEWG     ] += speed_multiplier * 1000;
  sf->thresh_mult[THR_NEWA     ] += speed_multiplier * 1000;

  sf->thresh_mult[THR_SPLITMV  ] += speed_multiplier * 2500;
  sf->thresh_mult[THR_SPLITG   ] += speed_multiplier * 2500;
  sf->thresh_mult[THR_SPLITA   ] += speed_multiplier * 2500;

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  sf->thresh_mult[THR_COMP_ZEROLA   ] += speed_multiplier * 1500;
  sf->thresh_mult[THR_COMP_ZEROGA   ] += speed_multiplier * 1500;
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  sf->thresh_mult[THR_COMP_NEARESTLA] += speed_multiplier * 1500;
  sf->thresh_mult[THR_COMP_NEARESTGA] += speed_multiplier * 1500;
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  sf->thresh_mult[THR_COMP_NEARLA   ] += speed_multiplier * 1500;
  sf->thresh_mult[THR_COMP_NEARGA   ] += speed_multiplier * 1500;
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  sf->thresh_mult[THR_COMP_NEWLA    ] += speed_multiplier * 2000;
  sf->thresh_mult[THR_COMP_NEWGA    ] += speed_multiplier * 2000;

  sf->thresh_mult[THR_COMP_SPLITLA  ] += speed_multiplier * 4500;
  sf->thresh_mult[THR_COMP_SPLITGA  ] += speed_multiplier * 4500;

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  if (speed > 4) {
    for (i = 0; i < MAX_MODES; ++i)
      sf->thresh_mult[i] = INT_MAX;

    sf->thresh_mult[THR_DC       ] = 0;
    sf->thresh_mult[THR_TM       ] = 0;
    sf->thresh_mult[THR_NEWMV    ] = 4000;
    sf->thresh_mult[THR_NEWG     ] = 4000;
    sf->thresh_mult[THR_NEWA     ] = 4000;
    sf->thresh_mult[THR_NEARESTMV] = 0;
    sf->thresh_mult[THR_NEARESTG ] = 0;
    sf->thresh_mult[THR_NEARESTA ] = 0;
    sf->thresh_mult[THR_NEARMV   ] = 2000;
    sf->thresh_mult[THR_NEARG    ] = 2000;
    sf->thresh_mult[THR_NEARA    ] = 2000;
    sf->thresh_mult[THR_COMP_NEARESTLA] = 2000;
    sf->recode_loop = 0;
  }

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  /* disable frame modes if flags not set */
  if (!(cpi->ref_frame_flags & VP9_LAST_FLAG)) {
    sf->thresh_mult[THR_NEWMV    ] = INT_MAX;
    sf->thresh_mult[THR_NEARESTMV] = INT_MAX;
    sf->thresh_mult[THR_ZEROMV   ] = INT_MAX;
    sf->thresh_mult[THR_NEARMV   ] = INT_MAX;
    sf->thresh_mult[THR_SPLITMV  ] = INT_MAX;
  }
  if (!(cpi->ref_frame_flags & VP9_GOLD_FLAG)) {
    sf->thresh_mult[THR_NEARESTG ] = INT_MAX;
    sf->thresh_mult[THR_ZEROG    ] = INT_MAX;
    sf->thresh_mult[THR_NEARG    ] = INT_MAX;
    sf->thresh_mult[THR_NEWG     ] = INT_MAX;
    sf->thresh_mult[THR_SPLITG   ] = INT_MAX;
  }
  if (!(cpi->ref_frame_flags & VP9_ALT_FLAG)) {
    sf->thresh_mult[THR_NEARESTA ] = INT_MAX;
    sf->thresh_mult[THR_ZEROA    ] = INT_MAX;
    sf->thresh_mult[THR_NEARA    ] = INT_MAX;
    sf->thresh_mult[THR_NEWA     ] = INT_MAX;
    sf->thresh_mult[THR_SPLITA   ] = INT_MAX;
  }

  if ((cpi->ref_frame_flags & (VP9_LAST_FLAG | VP9_ALT_FLAG)) !=
      (VP9_LAST_FLAG | VP9_ALT_FLAG)) {
    sf->thresh_mult[THR_COMP_ZEROLA   ] = INT_MAX;
    sf->thresh_mult[THR_COMP_NEARESTLA] = INT_MAX;
    sf->thresh_mult[THR_COMP_NEARLA   ] = INT_MAX;
    sf->thresh_mult[THR_COMP_NEWLA    ] = INT_MAX;
    sf->thresh_mult[THR_COMP_SPLITLA  ] = INT_MAX;
  }
  if ((cpi->ref_frame_flags & (VP9_GOLD_FLAG | VP9_ALT_FLAG)) !=
      (VP9_GOLD_FLAG | VP9_ALT_FLAG)) {
    sf->thresh_mult[THR_COMP_ZEROGA   ] = INT_MAX;
    sf->thresh_mult[THR_COMP_NEARESTGA] = INT_MAX;
    sf->thresh_mult[THR_COMP_NEARGA   ] = INT_MAX;
    sf->thresh_mult[THR_COMP_NEWGA    ] = INT_MAX;
    sf->thresh_mult[THR_COMP_SPLITGA  ] = INT_MAX;
  }
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}

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void vp9_set_speed_features(VP9_COMP *cpi) {
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  SPEED_FEATURES *sf = &cpi->sf;
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  int mode = cpi->compressor_speed;
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  int speed = cpi->speed;
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  int i;

  // Only modes 0 and 1 supported for now in experimental code basae
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  if (mode > 1)
    mode = 1;
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  // Initialise default mode frequency sampling variables
  for (i = 0; i < MAX_MODES; i ++) {
    cpi->mode_check_freq[i] = 0;
    cpi->mode_test_hit_counts[i] = 0;
    cpi->mode_chosen_counts[i] = 0;
  }

  // best quality defaults
  sf->RD = 1;
  sf->search_method = NSTEP;
  sf->auto_filter = 1;
  sf->recode_loop = 1;
  sf->quarter_pixel_search = 1;
  sf->half_pixel_search = 1;
  sf->iterative_sub_pixel = 1;
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  sf->optimize_coefficients = !cpi->oxcf.lossless;
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  sf->first_step = 0;
  sf->max_step_search_steps = MAX_MVSEARCH_STEPS;
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  sf->comp_inter_joint_search_thresh = BLOCK_SIZE_AB4X4;
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  sf->adpative_rd_thresh = 0;

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#if CONFIG_MULTIPLE_ARF
  // Switch segmentation off.
  sf->static_segmentation = 0;
#else
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  sf->static_segmentation = 0;
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#endif
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  switch (mode) {
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    case 0: // best quality mode
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      sf->search_best_filter = SEARCH_BEST_FILTER;
      break;

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    case 1:
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#if CONFIG_MULTIPLE_ARF
      // Switch segmentation off.
      sf->static_segmentation = 0;
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#else
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      sf->static_segmentation = 0;
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#endif
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      sf->comp_inter_joint_search_thresh = BLOCK_SIZE_SB8X8;
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      sf->adpative_rd_thresh = 1;
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      if (speed > 0) {
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        sf->comp_inter_joint_search_thresh = BLOCK_SIZE_TYPES;
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        sf->optimize_coefficients = 0;
        sf->first_step = 1;
      }
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      break;
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  }; /* switch */
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  // Set rd thresholds based on mode and speed setting
  set_rd_speed_thresholds(cpi, mode, speed);
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  // Slow quant, dct and trellis not worthwhile for first pass
  // so make sure they are always turned off.
  if (cpi->pass == 1) {
    sf->optimize_coefficients = 0;
  }
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  cpi->mb.fwd_txm16x16  = vp9_short_fdct16x16;
  cpi->mb.fwd_txm8x8    = vp9_short_fdct8x8;
  cpi->mb.fwd_txm8x4    = vp9_short_fdct8x4;
  cpi->mb.fwd_txm4x4    = vp9_short_fdct4x4;
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  if (cpi->oxcf.lossless || cpi->mb.e_mbd.lossless) {
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    cpi->mb.fwd_txm8x4    = vp9_short_walsh8x4;
    cpi->mb.fwd_txm4x4    = vp9_short_walsh4x4;
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  }
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  cpi->mb.quantize_b_4x4      = vp9_regular_quantize_b_4x4;
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  vp9_init_quantizer(cpi);
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  if (cpi->sf.iterative_sub_pixel == 1) {
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    cpi->find_fractional_mv_step = vp9_find_best_sub_pixel_step_iteratively;
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  } else if (cpi->sf.quarter_pixel_search) {
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    cpi->find_fractional_mv_step = vp9_find_best_sub_pixel_step;
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  } else if (cpi->sf.half_pixel_search) {
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    cpi->find_fractional_mv_step = vp9_find_best_half_pixel_step;
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  }
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  cpi->mb.optimize = cpi->sf.optimize_coefficients == 1 && cpi->pass != 1;
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#ifdef SPEEDSTATS
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  frames_at_speed[cpi->speed]++;
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#endif
}
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static void alloc_raw_frame_buffers(VP9_COMP *cpi) {
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  VP9_COMMON *cm = &cpi->common;

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  cpi->lookahead = vp9_lookahead_init(cpi->oxcf.width, cpi->oxcf.height,
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                                      cm->subsampling_x, cm->subsampling_y,
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                                      cpi->oxcf.lag_in_frames);
  if (!cpi->lookahead)
    vpx_internal_error(&cpi->common.error, VPX_CODEC_MEM_ERROR,
                       "Failed to allocate lag buffers");
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  if (vp9_realloc_frame_buffer(&cpi->alt_ref_buffer,
                               cpi->oxcf.width, cpi->oxcf.height,
                               cm->subsampling_x, cm->subsampling_y,
                               VP9BORDERINPIXELS))
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    vpx_internal_error(&cpi->common.error, VPX_CODEC_MEM_ERROR,
                       "Failed to allocate altref buffer");
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}
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static int alloc_partition_data(VP9_COMP *cpi) {
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  vpx_free(cpi->mb.pip);
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  cpi->mb.pip = vpx_calloc((cpi->common.mode_info_stride) *
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                           (cpi->common.mi_rows + 1),
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                           sizeof(PARTITION_INFO));
  if (!cpi->mb.pip)
    return 1;
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  cpi->mb.pi = cpi->mb.pip + cpi->common.mode_info_stride + 1;
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  return 0;
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}

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void vp9_alloc_compressor_data(VP9_COMP *cpi) {
  VP9_COMMON *cm = &cpi->common;
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  if (vp9_alloc_frame_buffers(cm, cm->width, cm->height))
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    vpx_internal_error(&cpi->common.error, VPX_CODEC_MEM_ERROR,
                       "Failed to allocate frame buffers");
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  if (alloc_partition_data(cpi))
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    vpx_internal_error(&cpi->common.error, VPX_CODEC_MEM_ERROR,
                       "Failed to allocate partition data");
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  if (vp9_alloc_frame_buffer(&cpi->last_frame_uf,
                             cm->width, cm->height,
                             cm->subsampling_x, cm->subsampling_y,
                             VP9BORDERINPIXELS))
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    vpx_internal_error(&cpi->common.error, VPX_CODEC_MEM_ERROR,
                       "Failed to allocate last frame buffer");
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  if (vp9_alloc_frame_buffer(&cpi->scaled_source,
                             cm->width, cm->height,
                             cm->subsampling_x, cm->subsampling_y,
                             VP9BORDERINPIXELS))
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    vpx_internal_error(&cpi->common.error, VPX_CODEC_MEM_ERROR,
                       "Failed to allocate scaled source buffer");
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  vpx_free(cpi->tok);
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  {
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    unsigned int tokens = get_token_alloc(cm->mb_rows, cm->mb_cols);
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    CHECK_MEM_ERROR(cpi->tok, vpx_calloc(tokens, sizeof(*cpi->tok)));
  }
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  // Data used for real time vc mode to see if gf needs refreshing
  cpi->inter_zz_count = 0;
  cpi->gf_bad_count = 0;
  cpi->gf_update_recommended = 0;
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  vpx_free(cpi->mb_activity_map);
  CHECK_MEM_ERROR(cpi->mb_activity_map,
                  vpx_calloc(sizeof(unsigned int),
                             cm->mb_rows * cm->mb_cols));
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  vpx_free(cpi->mb_norm_activity_map);
  CHECK_MEM_ERROR(cpi->mb_norm_activity_map,
                  vpx_calloc(sizeof(unsigned int),
                             cm->mb_rows * cm->mb_cols));
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}


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static void update_frame_size(VP9_COMP *cpi) {
  VP9_COMMON *cm = &cpi->common;

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  vp9_update_frame_size(cm);
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  // Update size of buffers local to this frame
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  if (vp9_realloc_frame_buffer(&cpi->last_frame_uf,
                               cm->width, cm->height,
                               cm->subsampling_x, cm->subsampling_y,
                               VP9BORDERINPIXELS))
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    vpx_internal_error(&cpi->common.error, VPX_CODEC_MEM_ERROR,
                       "Failed to reallocate last frame buffer");

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  if (vp9_realloc_frame_buffer(&cpi->scaled_source,
                               cm->width, cm->height,
                               cm->subsampling_x, cm->subsampling_y,
                               VP9BORDERINPIXELS))
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    vpx_internal_error(&cpi->common.error, VPX_CODEC_MEM_ERROR,
                       "Failed to reallocate scaled source buffer");
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  {
    int y_stride = cpi->scaled_source.y_stride;

    if (cpi->sf.search_method == NSTEP) {
      vp9_init3smotion_compensation(&cpi->mb, y_stride);
    } else if (cpi->sf.search_method == DIAMOND) {
      vp9_init_dsmotion_compensation(&cpi->mb, y_stride);
    }
  }
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}


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// TODO perhaps change number of steps expose to outside world when setting
// max and min limits. Also this will likely want refining for the extended Q
// range.
//
// Table that converts 0-63 Q range values passed in outside to the Qindex
// range used internally.
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static const int q_trans[] = {
  0,    4,   8,  12,  16,  20,  24,  28,
  32,   36,  40,  44,  48,  52,  56,  60,
  64,   68,  72,  76,  80,  84,  88,  92,
  96,  100, 104, 108, 112, 116, 120, 124,
  128, 132, 136, 140, 144, 148, 152, 156,
  160, 164, 168, 172, 176, 180, 184, 188,
  192, 196, 200, 204, 208, 212, 216, 220,
  224, 228, 232, 236, 240, 244, 249, 255,
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};
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int vp9_reverse_trans(int x) {
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  int i;
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  for (i = 0; i < 64; i++)
    if (q_trans[i] >= x)
      return i;
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  return 63;
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};
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void vp9_new_frame_rate(VP9_COMP *cpi, double framerate) {
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  if (framerate < 0.1)
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    framerate = 30;
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  cpi->oxcf.frame_rate             = framerate;
  cpi->output_frame_rate            = cpi->oxcf.frame_rate;
  cpi->per_frame_bandwidth          = (int)(cpi->oxcf.target_bandwidth / cpi->output_frame_rate);
  cpi->av_per_frame_bandwidth        = (int)(cpi->oxcf.target_bandwidth / cpi->output_frame_rate);
  cpi->min_frame_bandwidth          = (int)(cpi->av_per_frame_bandwidth * cpi->oxcf.two_pass_vbrmin_section / 100);
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  cpi->min_frame_bandwidth = MAX(cpi->min_frame_bandwidth, FRAME_OVERHEAD_BITS);
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  // Set Maximum gf/arf interval
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  cpi->max_gf_interval = 16;
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  // Extended interval for genuinely static scenes
  cpi->twopass.static_scene_max_gf_interval = cpi->key_frame_frequency >> 1;
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  // Special conditions when alt ref frame enabled in lagged compress mode
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  if (cpi->oxcf.play_alternate && cpi->oxcf.lag_in_frames) {
    if (cpi->max_gf_interval > cpi->oxcf.lag_in_frames - 1)
      cpi->max_gf_interval = cpi->oxcf.lag_in_frames - 1;
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    if (cpi->twopass.static_scene_max_gf_interval > cpi->oxcf.lag_in_frames - 1)
      cpi->twopass.static_scene_max_gf_interval = cpi->oxcf.lag_in_frames - 1;
  }
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  if (cpi->max_gf_interval > cpi->twopass.static_scene_max_gf_interval)
    cpi->max_gf_interval = cpi->twopass.static_scene_max_gf_interval;
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}

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static int64_t rescale(int val, int64_t num, int denom) {
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  int64_t llnum = num;
  int64_t llden = denom;
  int64_t llval = val;
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  return (ll