/*

 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.

 *

 *  Use of this source code is governed by a BSD-style license

 *  that can be found in the LICENSE file in the root of the source

 *  tree. An additional intellectual property rights grant can be found

 *  in the file PATENTS.  All contributing project authors may

 *  be found in the AUTHORS file in the root of the source tree.

 */

#include <assert.h>

#include <limits.h>

#include <math.h>

#include <stddef.h>

#include <stdint.h>

#include <stdlib.h>

#include <string.h>

#include "./vpx_config.h"

#include "vpx/vpx_encoder.h"

#include "vpx/vpx_image.h"

#include "vpx/vpx_ext_ratectrl.h"

#include "vpx_dsp/psnr.h"

#include "vpx_dsp/vpx_dsp_common.h"

#include "vpx_ports/static_assert.h"

#include "vpx_ports/system_state.h"

#include "vpx_scale/yv12config.h"

#include "vpx_util/vpx_timestamp.h"

#include "vpx/internal/vpx_codec_internal.h"

#include "./vpx_version.h"

#include "vp9/encoder/vp9_encoder.h"

#include "vp9/encoder/vp9_ethread.h"

#include "vpx/vp8cx.h"

#include "vp9/common/vp9_alloccommon.h"

#include "vp9/common/vp9_scale.h"

#include "vp9/vp9_cx_iface.h"

#include "vp9/encoder/vp9_firstpass.h"

#include "vp9/encoder/vp9_lookahead.h"

#include "vp9/vp9_cx_iface.h"

#include "vp9/vp9_iface_common.h"

#include "vpx/vpx_tpl.h"

typedef struct vp9_extracfg {

  int cpu_used;  // available cpu percentage in 1/16

  unsigned int enable_auto_alt_ref;

  unsigned int noise_sensitivity;

  unsigned int sharpness;

  unsigned int static_thresh;

  unsigned int tile_columns;

  unsigned int tile_rows;

  unsigned int enable_tpl_model;

  unsigned int enable_keyframe_filtering;

  unsigned int arnr_max_frames;

  unsigned int arnr_strength;

  unsigned int min_gf_interval;

  unsigned int max_gf_interval;

  vp8e_tuning tuning;

  unsigned int cq_level;  // constrained quality level

  unsigned int rc_max_intra_bitrate_pct;

  unsigned int rc_max_inter_bitrate_pct;

  unsigned int gf_cbr_boost_pct;

  unsigned int lossless;

  unsigned int target_level;

  unsigned int frame_parallel_decoding_mode;

  AQ_MODE aq_mode;

  int alt_ref_aq;

  unsigned int frame_periodic_boost;

  vpx_bit_depth_t bit_depth;

  vp9e_tune_content content;

  vpx_color_space_t color_space;

  vpx_color_range_t color_range;

  int render_width;

  int render_height;

  unsigned int row_mt;

  unsigned int motion_vector_unit_test;

  int delta_q_uv;

  unsigned int validate_hbd_input;

} vp9_extracfg;

static struct vp9_extracfg default_extra_cfg = {

#if CONFIG_REALTIME_ONLY

  5,  // cpu_used

#else

  0,  // cpu_used

#endif

  1,                     // enable_auto_alt_ref

  0,                     // noise_sensitivity

  0,                     // sharpness

  0,                     // static_thresh

  6,                     // tile_columns

  0,                     // tile_rows

  1,                     // enable_tpl_model

  0,                     // enable_keyframe_filtering

  7,                     // arnr_max_frames

  5,                     // arnr_strength

  0,                     // min_gf_interval; 0 -> default decision

  0,                     // max_gf_interval; 0 -> default decision

  VP8_TUNE_PSNR,         // tuning

  10,                    // cq_level

  0,                     // rc_max_intra_bitrate_pct

  0,                     // rc_max_inter_bitrate_pct

  0,                     // gf_cbr_boost_pct

  0,                     // lossless

  255,                   // target_level

  1,                     // frame_parallel_decoding_mode

  NO_AQ,                 // aq_mode

  0,                     // alt_ref_aq

  0,                     // frame_periodic_delta_q

  VPX_BITS_8,            // Bit depth

  VP9E_CONTENT_DEFAULT,  // content

  VPX_CS_UNKNOWN,        // color space

  0,                     // color range

  0,                     // render width

  0,                     // render height

  0,                     // row_mt

  0,                     // motion_vector_unit_test

  0,                     // delta_q_uv

  1,                     // validate_hbd_input

};

struct vpx_codec_alg_priv {

  vpx_codec_priv_t base;

  vpx_codec_enc_cfg_t cfg;

  struct vp9_extracfg extra_cfg;

  vpx_codec_pts_t pts_offset;

  unsigned char pts_offset_initialized;

  VP9EncoderConfig oxcf;

  VP9_COMP *cpi;

  unsigned char *cx_data;

  size_t cx_data_sz;

  // pending_cx_data either is a null pointer or points into the cx_data buffer.

  unsigned char *pending_cx_data;

  size_t pending_cx_data_sz;

  int pending_frame_count;

  size_t pending_frame_sizes[8];

  size_t pending_frame_magnitude;

  vpx_image_t preview_img;

  vpx_enc_frame_flags_t next_frame_flags;

  vp8_postproc_cfg_t preview_ppcfg;

  vpx_codec_pkt_list_decl(256) pkt_list;

  unsigned int fixed_kf_cntr;

  vpx_codec_priv_output_cx_pkt_cb_pair_t output_cx_pkt_cb;

  // BufferPool that holds all reference frames.

  BufferPool *buffer_pool;

  vpx_fixed_buf_t global_headers;

  int global_header_subsampling;

};

// Called by encoder_set_config() and encoder_encode() only. Must not be called

// by encoder_init() because the `error` paramerer (cpi->common.error) will be

// destroyed by vpx_codec_enc_init_ver() after encoder_init() returns an error.

// See the "IMPORTANT" comment in vpx_codec_enc_init_ver().

static vpx_codec_err_t update_error_state(

    vpx_codec_alg_priv_t *ctx, const struct vpx_internal_error_info *error) {

  const vpx_codec_err_t res = error->error_code;

  if (res != VPX_CODEC_OK)

    ctx->base.err_detail = error->has_detail ? error->detail : NULL;

  return res;

}

#undef ERROR

#define ERROR(str)                  \

  do {                              \

    ctx->base.err_detail = str;     \

    return VPX_CODEC_INVALID_PARAM; \

  } while (0)

#define RANGE_CHECK(p, memb, lo, hi)                                     \

  do {                                                                   \

    if (!(((p)->memb == (lo) || (p)->memb > (lo)) && (p)->memb <= (hi))) \

      ERROR(#memb " out of range [" #lo ".." #hi "]");                   \

  } while (0)

#define RANGE_CHECK_HI(p, memb, hi)                                     \

  do {                                                                  \

    if (!((p)->memb <= (hi))) ERROR(#memb " out of range [.." #hi "]"); \

  } while (0)

#define RANGE_CHECK_LO(p, memb, lo)                                     \

  do {                                                                  \

    if (!((p)->memb >= (lo))) ERROR(#memb " out of range [" #lo "..]"); \

  } while (0)

#define RANGE_CHECK_BOOL(p, memb)                                     \

  do {                                                                \

    if (!!((p)->memb) != (p)->memb) ERROR(#memb " expected boolean"); \

  } while (0)

static vpx_codec_err_t validate_config(vpx_codec_alg_priv_t *ctx,

                                       const vpx_codec_enc_cfg_t *cfg,

                                       const struct vp9_extracfg *extra_cfg) {

  RANGE_CHECK(cfg, g_w, 1, 65536);  // 16 bits available

  RANGE_CHECK(cfg, g_h, 1, 65536);  // 16 bits available

  RANGE_CHECK(cfg, g_timebase.den, 1, 1000000000);

  RANGE_CHECK(cfg, g_timebase.num, 1, 1000000000);

  RANGE_CHECK_HI(cfg, g_profile, 3);

  RANGE_CHECK_HI(cfg, rc_max_quantizer, 63);

  RANGE_CHECK_HI(cfg, rc_min_quantizer, cfg->rc_max_quantizer);

  RANGE_CHECK_BOOL(extra_cfg, lossless);

  RANGE_CHECK_BOOL(extra_cfg, frame_parallel_decoding_mode);

  RANGE_CHECK(extra_cfg, aq_mode, 0, AQ_MODE_COUNT - 2);

  RANGE_CHECK(extra_cfg, alt_ref_aq, 0, 1);

  RANGE_CHECK(extra_cfg, frame_periodic_boost, 0, 1);

  RANGE_CHECK_HI(cfg, g_threads, MAX_NUM_THREADS);

  RANGE_CHECK_HI(cfg, g_lag_in_frames, MAX_LAG_BUFFERS);

  RANGE_CHECK(cfg, rc_end_usage, VPX_VBR, VPX_Q);

  RANGE_CHECK_HI(cfg, rc_undershoot_pct, 100);

  RANGE_CHECK_HI(cfg, rc_overshoot_pct, 100);

  RANGE_CHECK_HI(cfg, rc_2pass_vbr_bias_pct, 100);

  RANGE_CHECK(cfg, rc_2pass_vbr_corpus_complexity, 0, 10000);

  RANGE_CHECK(cfg, kf_mode, VPX_KF_DISABLED, VPX_KF_AUTO);

  RANGE_CHECK_BOOL(cfg, rc_resize_allowed);

  RANGE_CHECK_HI(cfg, rc_dropframe_thresh, 100);

  RANGE_CHECK_HI(cfg, rc_resize_up_thresh, 100);

  RANGE_CHECK_HI(cfg, rc_resize_down_thresh, 100);

#if CONFIG_REALTIME_ONLY

  RANGE_CHECK(cfg, g_pass, VPX_RC_ONE_PASS, VPX_RC_ONE_PASS);

#else

  RANGE_CHECK(cfg, g_pass, VPX_RC_ONE_PASS, VPX_RC_LAST_PASS);

#endif

  RANGE_CHECK(extra_cfg, min_gf_interval, 0, (MAX_LAG_BUFFERS - 1));

  RANGE_CHECK(extra_cfg, max_gf_interval, 0, (MAX_LAG_BUFFERS - 1));

  if (extra_cfg->max_gf_interval > 0) {

    RANGE_CHECK(extra_cfg, max_gf_interval, 2, (MAX_LAG_BUFFERS - 1));

  }

  if (extra_cfg->min_gf_interval > 0 && extra_cfg->max_gf_interval > 0) {

    RANGE_CHECK(extra_cfg, max_gf_interval, extra_cfg->min_gf_interval,

                (MAX_LAG_BUFFERS - 1));

  }

  // For formation of valid ARF groups lag_in _frames should be 0 or greater

  // than the max_gf_interval + 2

  if (cfg->g_lag_in_frames > 0 && extra_cfg->max_gf_interval > 0 &&

      cfg->g_lag_in_frames < extra_cfg->max_gf_interval + 2) {

    ERROR("Set lag in frames to 0 (low delay) or >= (max-gf-interval + 2)");

  }

  if (cfg->rc_resize_allowed == 1) {

    RANGE_CHECK(cfg, rc_scaled_width, 0, cfg->g_w);

    RANGE_CHECK(cfg, rc_scaled_height, 0, cfg->g_h);

  }

  RANGE_CHECK(cfg, ss_number_layers, 1, VPX_SS_MAX_LAYERS);

  RANGE_CHECK(cfg, ts_number_layers, 1, VPX_TS_MAX_LAYERS);

  {

    unsigned int level = extra_cfg->target_level;

    if (level != LEVEL_1 && level != LEVEL_1_1 && level != LEVEL_2 &&

        level != LEVEL_2_1 && level != LEVEL_3 && level != LEVEL_3_1 &&

        level != LEVEL_4 && level != LEVEL_4_1 && level != LEVEL_5 &&

        level != LEVEL_5_1 && level != LEVEL_5_2 && level != LEVEL_6 &&

        level != LEVEL_6_1 && level != LEVEL_6_2 && level != LEVEL_UNKNOWN &&

        level != LEVEL_AUTO && level != LEVEL_MAX)

      ERROR("target_level is invalid");

  }

  if (cfg->ss_number_layers * cfg->ts_number_layers > VPX_MAX_LAYERS)

    ERROR("ss_number_layers * ts_number_layers is out of range");

  if (cfg->ts_number_layers > 1) {

    unsigned int sl, tl;

    for (sl = 1; sl < cfg->ss_number_layers; ++sl) {

      for (tl = 1; tl < cfg->ts_number_layers; ++tl) {

        const int layer = LAYER_IDS_TO_IDX(sl, tl, cfg->ts_number_layers);

        if (cfg->layer_target_bitrate[layer] <

            cfg->layer_target_bitrate[layer - 1])

          ERROR("ts_target_bitrate entries are not increasing");

      }

    }

    RANGE_CHECK(cfg, ts_rate_decimator[cfg->ts_number_layers - 1], 1, 1);

    for (tl = cfg->ts_number_layers - 2; tl > 0; --tl)

      if (cfg->ts_rate_decimator[tl - 1] != 2 * cfg->ts_rate_decimator[tl])

        ERROR("ts_rate_decimator factors are not powers of 2");

  }

  // VP9 does not support a lower bound on the keyframe interval in

  // automatic keyframe placement mode.

  if (cfg->kf_mode != VPX_KF_DISABLED && cfg->kf_min_dist != cfg->kf_max_dist &&

      cfg->kf_min_dist > 0)

    ERROR(

        "kf_min_dist not supported in auto mode, use 0 "

        "or kf_max_dist instead.");

  RANGE_CHECK(extra_cfg, row_mt, 0, 1);

  RANGE_CHECK(extra_cfg, motion_vector_unit_test, 0, 2);

  RANGE_CHECK(extra_cfg, enable_auto_alt_ref, 0, MAX_ARF_LAYERS);

  RANGE_CHECK(extra_cfg, cpu_used, -9, 9);

  RANGE_CHECK_HI(extra_cfg, noise_sensitivity, 6);

  RANGE_CHECK(extra_cfg, tile_columns, 0, 6);

  RANGE_CHECK(extra_cfg, tile_rows, 0, 2);

  RANGE_CHECK_HI(extra_cfg, sharpness, 7);

  RANGE_CHECK(extra_cfg, arnr_max_frames, 0, 15);

  RANGE_CHECK_HI(extra_cfg, arnr_strength, 6);

  RANGE_CHECK(extra_cfg, cq_level, 0, 63);

  RANGE_CHECK(cfg, g_bit_depth, VPX_BITS_8, VPX_BITS_12);

  RANGE_CHECK(cfg, g_input_bit_depth, 8, 12);

  if (cfg->g_input_bit_depth > (unsigned int)cfg->g_bit_depth)

    ERROR("Input bit-depth must not exceed codec bit-depth");

  RANGE_CHECK(extra_cfg, content, VP9E_CONTENT_DEFAULT,

              VP9E_CONTENT_INVALID - 1);

#if !CONFIG_REALTIME_ONLY

  if (cfg->g_pass == VPX_RC_LAST_PASS) {

    const size_t packet_sz = sizeof(FIRSTPASS_STATS);

    const int n_packets = (int)(cfg->rc_twopass_stats_in.sz / packet_sz);

    const FIRSTPASS_STATS *stats;

    if (cfg->rc_twopass_stats_in.buf == NULL)

      ERROR("rc_twopass_stats_in.buf not set.");

    if (cfg->rc_twopass_stats_in.sz % packet_sz)

      ERROR("rc_twopass_stats_in.sz indicates truncated packet.");

    if (cfg->ss_number_layers > 1 || cfg->ts_number_layers > 1) {

      int i;

      int n_packets_per_layer[VPX_SS_MAX_LAYERS] = { 0 };

      stats = cfg->rc_twopass_stats_in.buf;

      for (i = 0; i < n_packets; ++i) {

        const int layer_id = (int)stats[i].spatial_layer_id;

        if (layer_id >= 0 && layer_id < (int)cfg->ss_number_layers) {

          ++n_packets_per_layer[layer_id];

        }

      }

      for (i = 0; i < (int)cfg->ss_number_layers; ++i) {

        unsigned int layer_id;

        if (n_packets_per_layer[i] < 2) {

          ERROR(

              "rc_twopass_stats_in requires at least two packets for each "

              "layer.");

        }

        stats = (const FIRSTPASS_STATS *)cfg->rc_twopass_stats_in.buf +

                n_packets - cfg->ss_number_layers + i;

        layer_id = (int)stats->spatial_layer_id;

        const double count_rounded = stats->count + 0.5;

        if (layer_id >= cfg->ss_number_layers ||

            !isfinite((float)stats->count) || stats->count < 0.0 ||

            count_rounded > (double)INT_MAX ||

            (int)count_rounded != n_packets_per_layer[layer_id] - 1)

          ERROR("rc_twopass_stats_in missing EOS stats packet");

      }

    } else {

      if (cfg->rc_twopass_stats_in.sz < 2 * packet_sz)

        ERROR("rc_twopass_stats_in requires at least two packets.");

      stats =

          (const FIRSTPASS_STATS *)cfg->rc_twopass_stats_in.buf + n_packets - 1;

      const double count_rounded = stats->count + 0.5;

      if (!isfinite((float)stats->count) || stats->count < 0.0 ||

          count_rounded > (double)INT_MAX ||

          (int)count_rounded != n_packets - 1)

        ERROR("rc_twopass_stats_in missing EOS stats packet");

    }

  }

#endif  // !CONFIG_REALTIME_ONLY

#if !CONFIG_VP9_HIGHBITDEPTH

  if (cfg->g_profile > (unsigned int)PROFILE_1) {

    ERROR("Profile > 1 not supported in this build configuration");

  }

#endif

  if (cfg->g_profile <= (unsigned int)PROFILE_1 &&

      cfg->g_bit_depth > VPX_BITS_8) {

    ERROR("Codec high bit-depth not supported in profile < 2");

  }

  if (cfg->g_profile > (unsigned int)PROFILE_1 &&

      cfg->g_bit_depth == VPX_BITS_8) {

    ERROR("Codec bit-depth 8 not supported in profile > 1");

  }

  RANGE_CHECK(extra_cfg, color_space, VPX_CS_UNKNOWN, VPX_CS_SRGB);

  RANGE_CHECK(extra_cfg, color_range, VPX_CR_STUDIO_RANGE, VPX_CR_FULL_RANGE);

  // The range below shall be further tuned.

  RANGE_CHECK(cfg, use_vizier_rc_params, 0, 1);

  RANGE_CHECK(cfg, active_wq_factor.den, 1, 1000);

  RANGE_CHECK(cfg, err_per_mb_factor.den, 1, 1000);

  RANGE_CHECK(cfg, sr_default_decay_limit.den, 1, 1000);

  RANGE_CHECK(cfg, sr_diff_factor.den, 1, 1000);

  RANGE_CHECK(cfg, kf_err_per_mb_factor.den, 1, 1000);

  RANGE_CHECK(cfg, kf_frame_min_boost_factor.den, 1, 1000);

  RANGE_CHECK(cfg, kf_frame_max_boost_subs_factor.den, 1, 1000);

  RANGE_CHECK(cfg, kf_max_total_boost_factor.den, 1, 1000);

  RANGE_CHECK(cfg, gf_max_total_boost_factor.den, 1, 1000);

  RANGE_CHECK(cfg, gf_frame_max_boost_factor.den, 1, 1000);

  RANGE_CHECK(cfg, zm_factor.den, 1, 1000);

  RANGE_CHECK(cfg, rd_mult_inter_qp_fac.den, 1, 1000);

  RANGE_CHECK(cfg, rd_mult_arf_qp_fac.den, 1, 1000);

  RANGE_CHECK(cfg, rd_mult_key_qp_fac.den, 1, 1000);

  return VPX_CODEC_OK;

}

static vpx_codec_err_t validate_img(vpx_codec_alg_priv_t *ctx,

                                    const vpx_image_t *img) {

  switch (img->fmt) {

    case VPX_IMG_FMT_YV12:

    case VPX_IMG_FMT_I420:

    case VPX_IMG_FMT_I42016:

    case VPX_IMG_FMT_NV12: break;

    case VPX_IMG_FMT_I422:

    case VPX_IMG_FMT_I444:

    case VPX_IMG_FMT_I440:

      if (ctx->cfg.g_profile != (unsigned int)PROFILE_1) {

        ERROR(

            "Invalid image format. I422, I444, I440 images are not supported "

            "in profile.");

      }

      break;

    case VPX_IMG_FMT_I42216:

    case VPX_IMG_FMT_I44416:

    case VPX_IMG_FMT_I44016:

      if (ctx->cfg.g_profile != (unsigned int)PROFILE_1 &&

          ctx->cfg.g_profile != (unsigned int)PROFILE_3) {

        ERROR(

            "Invalid image format. 16-bit I422, I444, I440 images are "

            "not supported in profile.");

      }

      break;

    default:

      ERROR(

          "Invalid image format. Only YV12, I420, I422, I444, I440, NV12 "

          "images are supported.");

      break;

  }

  if (img->d_w != ctx->cfg.g_w || img->d_h != ctx->cfg.g_h)

    ERROR("Image size must match encoder init configuration size");

  assert(img->fmt & VPX_IMG_FMT_PLANAR);

  if (img->stride[VPX_PLANE_U] != img->stride[VPX_PLANE_V])

    ERROR("Image U/V strides must match");

#if CONFIG_VP9_HIGHBITDEPTH

  // The following checks ensure that the image format matches the encoder's

  // high bit-depth setting. Currently, libvpx overwrites function pointers if

  // use_highbitdepth is set to 1, but there is no other way around if the

  // internal flag gets reset to 0.

  if (ctx->oxcf.use_highbitdepth && !(img->fmt & VPX_IMG_FMT_HIGHBITDEPTH)) {

    ERROR(

        "Encoder initialized with VPX_CODEC_USE_HIGHBITDEPTH requires a "

        "high-bit-depth image format (e.g. VPX_IMG_FMT_I42016)");

  }

  if (!ctx->oxcf.use_highbitdepth && (img->fmt & VPX_IMG_FMT_HIGHBITDEPTH)) {

    ERROR(

        "Non-high-bit-depth encoder cannot accept a high-bit-depth image "

        "format");

  }

  if (ctx->extra_cfg.validate_hbd_input &&

      (img->fmt & VPX_IMG_FMT_HIGHBITDEPTH)) {

    const unsigned int h = img->d_h;

    const unsigned int w = img->d_w;

    const unsigned int bit_depth = ctx->cfg.g_bit_depth;

    const int max_val = 1 << bit_depth;

    for (int plane = 0; plane < 3; ++plane) {

      const unsigned short *src = (const unsigned short *)img->planes[plane];

      const unsigned int stride = img->stride[plane] / 2;

      const unsigned int ph =

          (plane == 0) ? h : (h + img->y_chroma_shift) >> img->y_chroma_shift;

      const unsigned int pw =

          (plane == 0) ? w : (w + img->x_chroma_shift) >> img->x_chroma_shift;

      for (unsigned int i = 0; i < ph; ++i) {

        for (unsigned int j = 0; j < pw; ++j) {

          if (src[j] >= max_val) {

            return VPX_CODEC_INVALID_PARAM;

          }

        }

        src += stride;

      }

    }

  }

#endif  // CONFIG_VP9_HIGHBITDEPTH

  return VPX_CODEC_OK;

}

static int get_image_bps(const vpx_image_t *img) {

  switch (img->fmt) {

    case VPX_IMG_FMT_YV12:

    case VPX_IMG_FMT_NV12:

    case VPX_IMG_FMT_I420: return 12;

    case VPX_IMG_FMT_I422: return 16;

    case VPX_IMG_FMT_I444: return 24;

    case VPX_IMG_FMT_I440: return 16;

    case VPX_IMG_FMT_I42016: return 24;

    case VPX_IMG_FMT_I42216: return 32;

    case VPX_IMG_FMT_I44416: return 48;

    case VPX_IMG_FMT_I44016: return 32;

    default: assert(0 && "Invalid image format"); break;

  }

  return 0;

}

// Modify the encoder config for the target level.

static void config_target_level(VP9EncoderConfig *oxcf) {

  double max_average_bitrate;  // in bits per second

  int max_over_shoot_pct;

  const int target_level_index = get_level_index(oxcf->target_level);

  vpx_clear_system_state();

  assert(target_level_index >= 0);

  assert(target_level_index < VP9_LEVELS);

  // Maximum target bit-rate is level_limit * 80%.

  max_average_bitrate =

      vp9_level_defs[target_level_index].average_bitrate * 800.0;

  if ((double)oxcf->target_bandwidth > max_average_bitrate)

    oxcf->target_bandwidth = (int64_t)(max_average_bitrate);

  if (oxcf->ss_number_layers == 1 && oxcf->pass != 0)

    oxcf->ss_target_bitrate[0] = (int)oxcf->target_bandwidth;

  // Adjust max over-shoot percentage (only when target_bandwidth > 0).

  if (oxcf->target_bandwidth > 0) {

    max_over_shoot_pct =

        (int)((max_average_bitrate * 1.10 - (double)oxcf->target_bandwidth) *

              100 / (double)(oxcf->target_bandwidth));

    if (oxcf->over_shoot_pct > max_over_shoot_pct)

      oxcf->over_shoot_pct = max_over_shoot_pct;

  }

  // Adjust worst allowed quantizer.

  oxcf->worst_allowed_q = vp9_quantizer_to_qindex(63);

  // Adjust minimum art-ref distance.

  // min_gf_interval should be no less than min_altref_distance + 1,

  // as the encoder may produce bitstream with alt-ref distance being

  // min_gf_interval - 1.

  if (oxcf->min_gf_interval <=

      (int)vp9_level_defs[target_level_index].min_altref_distance) {

    oxcf->min_gf_interval =

        (int)vp9_level_defs[target_level_index].min_altref_distance + 1;

    // If oxcf->max_gf_interval == 0, it will be assigned with a default value

    // in vp9_rc_set_gf_interval_range().

    if (oxcf->max_gf_interval != 0) {

      oxcf->max_gf_interval =

          VPXMAX(oxcf->max_gf_interval, oxcf->min_gf_interval);

    }

  }

  // Adjust maximum column tiles.

  if (vp9_level_defs[target_level_index].max_col_tiles <

      (1 << oxcf->tile_columns)) {

    while (oxcf->tile_columns > 0 &&

           vp9_level_defs[target_level_index].max_col_tiles <

               (1 << oxcf->tile_columns))

      --oxcf->tile_columns;

  }

}

static vpx_rational64_t get_g_timebase_in_ts(vpx_rational_t g_timebase) {

  vpx_rational64_t g_timebase_in_ts;

  g_timebase_in_ts.den = g_timebase.den;

  g_timebase_in_ts.num = g_timebase.num;

  g_timebase_in_ts.num *= TICKS_PER_SEC;

  reduce_ratio(&g_timebase_in_ts);

  return g_timebase_in_ts;

}

static vpx_codec_err_t set_encoder_config(

    VP9EncoderConfig *oxcf, vpx_codec_enc_cfg_t *cfg,

    const struct vp9_extracfg *extra_cfg) {

  int sl, tl;

  unsigned int raw_target_rate;

  oxcf->profile = cfg->g_profile;

  oxcf->max_threads = (int)cfg->g_threads;

  oxcf->width = cfg->g_w;

  oxcf->height = cfg->g_h;

  oxcf->bit_depth = cfg->g_bit_depth;

  oxcf->input_bit_depth = cfg->g_input_bit_depth;

  // TODO(angiebird): Figure out if we can just use g_timebase to indicate the

  // inverse of framerate

  // guess a frame rate if out of whack, use 30

  oxcf->init_framerate = (double)cfg->g_timebase.den / cfg->g_timebase.num;

  if (oxcf->init_framerate > 180) oxcf->init_framerate = 30;

  oxcf->g_timebase = cfg->g_timebase;

  oxcf->g_timebase_in_ts = get_g_timebase_in_ts(oxcf->g_timebase);

  oxcf->mode = GOOD;

  switch (cfg->g_pass) {

    case VPX_RC_ONE_PASS: oxcf->pass = 0; break;

    case VPX_RC_FIRST_PASS: oxcf->pass = 1; break;

    case VPX_RC_LAST_PASS: oxcf->pass = 2; break;

  }

  oxcf->lag_in_frames =

      cfg->g_pass == VPX_RC_FIRST_PASS ? 0 : cfg->g_lag_in_frames;

  oxcf->rc_mode = cfg->rc_end_usage;

  raw_target_rate =

      (unsigned int)((int64_t)oxcf->width * oxcf->height * oxcf->bit_depth * 3 *

                     oxcf->init_framerate / 1000);

  // Cap target bitrate to raw rate or 1000Mbps, whichever is less

  cfg->rc_target_bitrate =

      VPXMIN(VPXMIN(raw_target_rate, cfg->rc_target_bitrate), 1000000);

  // Convert target bandwidth from Kbit/s to Bit/s

  oxcf->target_bandwidth = 1000 * (int64_t)cfg->rc_target_bitrate;

  oxcf->rc_max_intra_bitrate_pct = extra_cfg->rc_max_intra_bitrate_pct;

  oxcf->rc_max_inter_bitrate_pct = extra_cfg->rc_max_inter_bitrate_pct;

  oxcf->gf_cbr_boost_pct = extra_cfg->gf_cbr_boost_pct;

  oxcf->best_allowed_q =

      extra_cfg->lossless ? 0 : vp9_quantizer_to_qindex(cfg->rc_min_quantizer);

  oxcf->worst_allowed_q =

      extra_cfg->lossless ? 0 : vp9_quantizer_to_qindex(cfg->rc_max_quantizer);

  oxcf->cq_level = vp9_quantizer_to_qindex(extra_cfg->cq_level);

  oxcf->fixed_q = -1;

  oxcf->under_shoot_pct = cfg->rc_undershoot_pct;

  oxcf->over_shoot_pct = cfg->rc_overshoot_pct;

  oxcf->scaled_frame_width = cfg->rc_scaled_width;

  oxcf->scaled_frame_height = cfg->rc_scaled_height;

  if (cfg->rc_resize_allowed == 1) {

    oxcf->resize_mode =

        (oxcf->scaled_frame_width == 0 || oxcf->scaled_frame_height == 0)

            ? RESIZE_DYNAMIC

            : RESIZE_FIXED;

  } else {

    oxcf->resize_mode = RESIZE_NONE;

  }

  oxcf->maximum_buffer_size_ms = cfg->rc_buf_sz;

  oxcf->starting_buffer_level_ms = cfg->rc_buf_initial_sz;

  oxcf->optimal_buffer_level_ms = cfg->rc_buf_optimal_sz;

  oxcf->drop_frames_water_mark = cfg->rc_dropframe_thresh;

  oxcf->two_pass_vbrbias = cfg->rc_2pass_vbr_bias_pct;

  oxcf->two_pass_vbrmin_section = cfg->rc_2pass_vbr_minsection_pct;

  oxcf->two_pass_vbrmax_section = cfg->rc_2pass_vbr_maxsection_pct;

  oxcf->vbr_corpus_complexity = cfg->rc_2pass_vbr_corpus_complexity;

  oxcf->auto_key =

      cfg->kf_mode == VPX_KF_AUTO && cfg->kf_min_dist != cfg->kf_max_dist;

  oxcf->key_freq = cfg->kf_max_dist;

  oxcf->speed = abs(extra_cfg->cpu_used);

  oxcf->encode_breakout = extra_cfg->static_thresh;

  oxcf->enable_auto_arf = extra_cfg->enable_auto_alt_ref;

  if (oxcf->bit_depth == VPX_BITS_8) {

    oxcf->noise_sensitivity = extra_cfg->noise_sensitivity;

  } else {

    // Disable denoiser for high bitdepth since vp9_denoiser_filter only works

    // for 8 bits.

    oxcf->noise_sensitivity = 0;

  }

  oxcf->sharpness = extra_cfg->sharpness;

  vp9_set_first_pass_stats(oxcf, &cfg->rc_twopass_stats_in);

  oxcf->color_space = extra_cfg->color_space;

  oxcf->color_range = extra_cfg->color_range;

  oxcf->render_width = extra_cfg->render_width;

  oxcf->render_height = extra_cfg->render_height;

  oxcf->arnr_max_frames = extra_cfg->arnr_max_frames;

  oxcf->arnr_strength = extra_cfg->arnr_strength;

  oxcf->min_gf_interval = extra_cfg->min_gf_interval;

  oxcf->max_gf_interval = extra_cfg->max_gf_interval;

  oxcf->tuning = extra_cfg->tuning;

  oxcf->content = extra_cfg->content;

  oxcf->tile_columns = extra_cfg->tile_columns;

  oxcf->enable_tpl_model = extra_cfg->enable_tpl_model;

  oxcf->enable_keyframe_filtering = extra_cfg->enable_keyframe_filtering;

  // TODO(yunqing): The dependencies between row tiles cause error in multi-

  // threaded encoding. For now, tile_rows is forced to be 0 in this case.

  // The further fix can be done by adding synchronizations after a tile row

  // is encoded. But this will hurt multi-threaded encoder performance. So,

  // it is recommended to use tile-rows=0 while encoding with threads > 1.

  if (oxcf->max_threads > 1 && oxcf->tile_columns > 0)

    oxcf->tile_rows = 0;

  else

    oxcf->tile_rows = extra_cfg->tile_rows;

  oxcf->error_resilient_mode = cfg->g_error_resilient;

  oxcf->frame_parallel_decoding_mode = extra_cfg->frame_parallel_decoding_mode;

  oxcf->aq_mode = extra_cfg->aq_mode;

  oxcf->alt_ref_aq = extra_cfg->alt_ref_aq;

  oxcf->frame_periodic_boost = extra_cfg->frame_periodic_boost;

  oxcf->ss_number_layers = cfg->ss_number_layers;

  oxcf->ts_number_layers = cfg->ts_number_layers;

  oxcf->temporal_layering_mode =

      (enum vp9e_temporal_layering_mode)cfg->temporal_layering_mode;

  if (oxcf->temporal_layering_mode == VP9E_TEMPORAL_LAYERING_MODE_NOLAYERING) {

    if (oxcf->ts_number_layers == 2)

      oxcf->temporal_layering_mode = VP9E_TEMPORAL_LAYERING_MODE_0101;

    else if (oxcf->ts_number_layers == 3)

      oxcf->temporal_layering_mode = VP9E_TEMPORAL_LAYERING_MODE_0212;

  }

  oxcf->target_level = extra_cfg->target_level;

  oxcf->row_mt = extra_cfg->row_mt;

  oxcf->motion_vector_unit_test = extra_cfg->motion_vector_unit_test;

  oxcf->delta_q_uv = extra_cfg->delta_q_uv;

  for (sl = 0; sl < oxcf->ss_number_layers; ++sl) {

    for (tl = 0; tl < oxcf->ts_number_layers; ++tl) {

      const int layer = sl * oxcf->ts_number_layers + tl;

      if (cfg->layer_target_bitrate[layer] > INT_MAX / 1000)

        oxcf->layer_target_bitrate[layer] = INT_MAX;

      else

        oxcf->layer_target_bitrate[layer] =

            1000 * cfg->layer_target_bitrate[layer];

    }

  }

  if (oxcf->ss_number_layers == 1 && oxcf->pass != 0) {

    oxcf->ss_target_bitrate[0] = (int)oxcf->target_bandwidth;

  }

  if (oxcf->ts_number_layers > 1) {

    for (tl = 0; tl < VPX_TS_MAX_LAYERS; ++tl) {

      oxcf->ts_rate_decimator[tl] =

          cfg->ts_rate_decimator[tl] ? cfg->ts_rate_decimator[tl] : 1;

    }

  } else if (oxcf->ts_number_layers == 1) {

    oxcf->ts_rate_decimator[0] = 1;

  }

  if (get_level_index(oxcf->target_level) >= 0) config_target_level(oxcf);

  // vp9_dump_encoder_config(oxcf, stderr);

  return VPX_CODEC_OK;

}

static vpx_codec_err_t set_twopass_params_from_config(

    const vpx_codec_enc_cfg_t *const cfg, struct VP9_COMP *cpi) {

  if (!cfg->use_vizier_rc_params) return VPX_CODEC_OK;

  if (cpi == NULL) return VPX_CODEC_ERROR;

  cpi->twopass.use_vizier_rc_params = cfg->use_vizier_rc_params;

  // The values set here are factors that will be applied to default values

  // to get the final value used in the two pass code. Hence 1.0 will

  // match the default behaviour when not using passed in values.

  // We also apply limits here to prevent the user from applying settings

  // that make no sense.

  cpi->twopass.active_wq_factor =

      (double)cfg->active_wq_factor.num / (double)cfg->active_wq_factor.den;

  if (cpi->twopass.active_wq_factor < 0.25)

    cpi->twopass.active_wq_factor = 0.25;

  else if (cpi->twopass.active_wq_factor > 16.0)

    cpi->twopass.active_wq_factor = 16.0;

  cpi->twopass.err_per_mb =

      (double)cfg->err_per_mb_factor.num / (double)cfg->err_per_mb_factor.den;

  if (cpi->twopass.err_per_mb < 0.25)

    cpi->twopass.err_per_mb = 0.25;

  else if (cpi->twopass.err_per_mb > 4.0)

    cpi->twopass.err_per_mb = 4.0;

  cpi->twopass.sr_default_decay_limit =

      (double)cfg->sr_default_decay_limit.num /

      (double)cfg->sr_default_decay_limit.den;

  if (cpi->twopass.sr_default_decay_limit < 0.25)

    cpi->twopass.sr_default_decay_limit = 0.25;

  // If the default changes this will need to change.

  else if (cpi->twopass.sr_default_decay_limit > 1.33)

    cpi->twopass.sr_default_decay_limit = 1.33;

  cpi->twopass.sr_diff_factor =

      (double)cfg->sr_diff_factor.num / (double)cfg->sr_diff_factor.den;

  if (cpi->twopass.sr_diff_factor < 0.25)

    cpi->twopass.sr_diff_factor = 0.25;

  else if (cpi->twopass.sr_diff_factor > 4.0)

    cpi->twopass.sr_diff_factor = 4.0;

  cpi->twopass.kf_err_per_mb = (double)cfg->kf_err_per_mb_factor.num /

                               (double)cfg->kf_err_per_mb_factor.den;

  if (cpi->twopass.kf_err_per_mb < 0.25)

    cpi->twopass.kf_err_per_mb = 0.25;

  else if (cpi->twopass.kf_err_per_mb > 4.0)

    cpi->twopass.kf_err_per_mb = 4.0;

  cpi->twopass.kf_frame_min_boost = (double)cfg->kf_frame_min_boost_factor.num /

                                    (double)cfg->kf_frame_min_boost_factor.den;

  if (cpi->twopass.kf_frame_min_boost < 0.25)

    cpi->twopass.kf_frame_min_boost = 0.25;

  else if (cpi->twopass.kf_frame_min_boost > 4.0)

    cpi->twopass.kf_frame_min_boost = 4.0;

  cpi->twopass.kf_frame_max_boost_first =

      (double)cfg->kf_frame_max_boost_first_factor.num /

      (double)cfg->kf_frame_max_boost_first_factor.den;

  if (cpi->twopass.kf_frame_max_boost_first < 0.25)

    cpi->twopass.kf_frame_max_boost_first = 0.25;

  else if (cpi->twopass.kf_frame_max_boost_first > 4.0)

    cpi->twopass.kf_frame_max_boost_first = 4.0;

  cpi->twopass.kf_frame_max_boost_subs =

      (double)cfg->kf_frame_max_boost_subs_factor.num /

      (double)cfg->kf_frame_max_boost_subs_factor.den;

  if (cpi->twopass.kf_frame_max_boost_subs < 0.25)

    cpi->twopass.kf_frame_max_boost_subs = 0.25;

  else if (cpi->twopass.kf_frame_max_boost_subs > 4.0)

    cpi->twopass.kf_frame_max_boost_subs = 4.0;

  cpi->twopass.kf_max_total_boost = (double)cfg->kf_max_total_boost_factor.num /

                                    (double)cfg->kf_max_total_boost_factor.den;

  if (cpi->twopass.kf_max_total_boost < 0.25)

    cpi->twopass.kf_max_total_boost = 0.25;

  else if (cpi->twopass.kf_max_total_boost > 4.0)

    cpi->twopass.kf_max_total_boost = 4.0;

  cpi->twopass.gf_max_total_boost = (double)cfg->gf_max_total_boost_factor.num /

                                    (double)cfg->gf_max_total_boost_factor.den;

  if (cpi->twopass.gf_max_total_boost < 0.25)

    cpi->twopass.gf_max_total_boost = 0.25;

  else if (cpi->twopass.gf_max_total_boost > 4.0)

    cpi->twopass.gf_max_total_boost = 4.0;

  cpi->twopass.gf_frame_max_boost = (double)cfg->gf_frame_max_boost_factor.num /

                                    (double)cfg->gf_frame_max_boost_factor.den;

  if (cpi->twopass.gf_frame_max_boost < 0.25)

    cpi->twopass.gf_frame_max_boost = 0.25;

  else if (cpi->twopass.gf_frame_max_boost > 4.0)

    cpi->twopass.gf_frame_max_boost = 4.0;

  cpi->twopass.zm_factor =

      (double)cfg->zm_factor.num / (double)cfg->zm_factor.den;

  if (cpi->twopass.zm_factor < 0.25)

    cpi->twopass.zm_factor = 0.25;

  else if (cpi->twopass.zm_factor > 2.0)

    cpi->twopass.zm_factor = 2.0;

  cpi->rd_ctrl.rd_mult_inter_qp_fac = (double)cfg->rd_mult_inter_qp_fac.num /

                                      (double)cfg->rd_mult_inter_qp_fac.den;

  if (cpi->rd_ctrl.rd_mult_inter_qp_fac < 0.25)

    cpi->rd_ctrl.rd_mult_inter_qp_fac = 0.25;

  else if (cpi->rd_ctrl.rd_mult_inter_qp_fac > 4.0)

    cpi->rd_ctrl.rd_mult_inter_qp_fac = 4.0;

  cpi->rd_ctrl.rd_mult_arf_qp_fac =

      (double)cfg->rd_mult_arf_qp_fac.num / (double)cfg->rd_mult_arf_qp_fac.den;

  if (cpi->rd_ctrl.rd_mult_arf_qp_fac < 0.25)

    cpi->rd_ctrl.rd_mult_arf_qp_fac = 0.25;

  else if (cpi->rd_ctrl.rd_mult_arf_qp_fac > 4.0)

    cpi->rd_ctrl.rd_mult_arf_qp_fac = 4.0;

  cpi->rd_ctrl.rd_mult_key_qp_fac =

      (double)cfg->rd_mult_key_qp_fac.num / (double)cfg->rd_mult_key_qp_fac.den;

  if (cpi->rd_ctrl.rd_mult_key_qp_fac < 0.25)

    cpi->rd_ctrl.rd_mult_key_qp_fac = 0.25;

  else if (cpi->rd_ctrl.rd_mult_key_qp_fac > 4.0)

    cpi->rd_ctrl.rd_mult_key_qp_fac = 4.0;

  return VPX_CODEC_OK;

}

static vpx_codec_err_t encoder_set_config(vpx_codec_alg_priv_t *ctx,

                                          const vpx_codec_enc_cfg_t *cfg) {

  vpx_codec_err_t res;

  volatile int force_key = 0;

  if (cfg->g_w != ctx->cfg.g_w || cfg->g_h != ctx->cfg.g_h) {

    if (cfg->g_lag_in_frames > 1 || cfg->g_pass != VPX_RC_ONE_PASS)

      ERROR("Cannot change width or height after initialization");

    // Note: function encoder_set_config() is allowed to be called multiple

    // times. However, when the original frame width or height is less than two

    // times of the new frame width or height, a forced key frame should be

    // used (for the case of single spatial layer, since otherwise a previous

    //  encoded frame at a lower layer may be the desired reference). To make

    //  sure the correct detection of a forced key frame, we need

    // to update the frame width and height only when the actual encoding is

    // performed. cpi->last_coded_width and cpi->last_coded_height are used to

    // track the actual coded frame size.

    if ((ctx->cpi->last_coded_width && ctx->cpi->last_coded_height &&

         (!valid_ref_frame_size(ctx->cpi->last_coded_width,

                                ctx->cpi->last_coded_height, cfg->g_w,

                                cfg->g_h) &&

          ctx->cpi->svc.number_spatial_layers == 1)) ||

        (ctx->cpi->initial_width && (int)cfg->g_w > ctx->cpi->initial_width) ||

        (ctx->cpi->initial_height &&

         (int)cfg->g_h > ctx->cpi->initial_height)) {

      force_key = 1;

    }

  }

  // Prevent increasing lag_in_frames. This check is stricter than it needs

  // to be -- the limit is not increasing past the first lag_in_frames

  // value, but we don't track the initial config, only the last successful

  // config.

  if (cfg->g_lag_in_frames > ctx->cfg.g_lag_in_frames)

    ERROR("Cannot increase lag_in_frames");

  res = validate_config(ctx, cfg, &ctx->extra_cfg);

  if (res != VPX_CODEC_OK) return res;

  if (setjmp(ctx->cpi->common.error.jmp)) {

    const vpx_codec_err_t codec_err =

        update_error_state(ctx, &ctx->cpi->common.error);

    ctx->cpi->common.error.setjmp = 0;

    vpx_clear_system_state();

    assert(codec_err != VPX_CODEC_OK);

    return codec_err;

  }

  ctx->cpi->common.error.setjmp = 1;

  ctx->cfg = *cfg;

  set_encoder_config(&ctx->oxcf, &ctx->cfg, &ctx->extra_cfg);

  set_twopass_params_from_config(&ctx->cfg, ctx->cpi);

  // On profile change, request a key frame

  force_key |= ctx->cpi->common.profile != ctx->oxcf.profile;

  vp9_change_config(ctx->cpi, &ctx->oxcf);

  if (force_key) ctx->next_frame_flags |= VPX_EFLAG_FORCE_KF;

  ctx->cpi->common.error.setjmp = 0;

  return VPX_CODEC_OK;

}

static vpx_codec_err_t ctrl_get_quantizer(vpx_codec_alg_priv_t *ctx,

                                          va_list args) {

  int *const arg = va_arg(args, int *);

  if (arg == NULL) return VPX_CODEC_INVALID_PARAM;

  *arg = vp9_get_quantizer(ctx->cpi);

  return VPX_CODEC_OK;

}