Rename vp8/ codec directory to vp9/.

Change-Id: Ic084c475844b24092a433ab88138cf58af3abbe4

1 files changed, 1169 insertions, 0 deletions

diff --git a/vp9/vp9_cx_iface.c b/vp9/vp9_cx_iface.c
new file mode 100644
index 000000000..1d8d950e0
--- /dev/null
+++ b/vp9/vp9_cx_iface.c
@@ -0,0 +1,1169 @@
+/*
+ *  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 "vpx/vpx_codec.h"
+#include "vpx/internal/vpx_codec_internal.h"
+#include "vpx_version.h"
+#include "vp9/encoder/onyx_int.h"
+#include "vpx/vp8e.h"
+#include "vp9/encoder/firstpass.h"
+#include "vp9/common/onyx.h"
+#include <stdlib.h>
+#include <string.h>
+
+/* This value is a sentinel for determining whether the user has set a mode
+ * directly through the deprecated VP8E_SET_ENCODING_MODE control.
+ */
+#define NO_MODE_SET 255
+
+struct vp8_extracfg {
+  struct vpx_codec_pkt_list *pkt_list;
+  vp8e_encoding_mode      encoding_mode;               /** best, good, realtime            */
+  int                         cpu_used;                    /** available cpu percentage in 1/16*/
+  unsigned int                enable_auto_alt_ref;           /** if encoder decides to uses alternate reference frame */
+  unsigned int                noise_sensitivity;
+  unsigned int                Sharpness;
+  unsigned int                static_thresh;
+  unsigned int                token_partitions;
+  unsigned int                arnr_max_frames;    /* alt_ref Noise Reduction Max Frame Count */
+  unsigned int                arnr_strength;    /* alt_ref Noise Reduction Strength */
+  unsigned int                arnr_type;        /* alt_ref filter type */
+  unsigned int                experimental;
+  vp8e_tuning                 tuning;
+  unsigned int                cq_level;         /* constrained quality level */
+  unsigned int                rc_max_intra_bitrate_pct;
+
+};
+
+struct extraconfig_map {
+  int                 usage;
+  struct vp8_extracfg cfg;
+};
+
+static const struct extraconfig_map extracfg_map[] = {
+  {
+    0,
+    {
+      NULL,
+      VP8_BEST_QUALITY_ENCODING,  /* Encoding Mode */
+      0,                          /* cpu_used      */
+      0,                          /* enable_auto_alt_ref */
+      0,                          /* noise_sensitivity */
+      0,                          /* Sharpness */
+      0,                          /* static_thresh */
+      VP8_ONE_TOKENPARTITION,     /* token_partitions */
+      0,                          /* arnr_max_frames */
+      3,                          /* arnr_strength */
+      3,                          /* arnr_type*/
+      0,                          /* experimental mode */
+      0,                          /* tuning*/
+      10,                         /* cq_level */
+      0,                          /* rc_max_intra_bitrate_pct */
+    }
+  }
+};
+
+struct vpx_codec_alg_priv {
+  vpx_codec_priv_t        base;
+  vpx_codec_enc_cfg_t     cfg;
+  struct vp8_extracfg     vp8_cfg;
+  VP9_CONFIG              oxcf;
+  VP9_PTR             cpi;
+  unsigned char          *cx_data;
+  unsigned int            cx_data_sz;
+  vpx_image_t             preview_img;
+  unsigned int            next_frame_flag;
+  vp8_postproc_cfg_t      preview_ppcfg;
+  vpx_codec_pkt_list_decl(64) pkt_list;              // changed to accomendate the maximum number of lagged frames allowed
+  int                         deprecated_mode;
+  unsigned int                fixed_kf_cntr;
+};
+
+
+static vpx_codec_err_t
+update_error_state(vpx_codec_alg_priv_t                 *ctx,
+                   const struct vpx_internal_error_info *error) {
+  vpx_codec_err_t res;
+
+  if ((res = error->error_code))
+    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 vp8_extracfg *vp8_cfg) {
+  RANGE_CHECK(cfg, g_w,                   1, 16383); /* 14 bits available */
+  RANGE_CHECK(cfg, g_h,                   1, 16383); /* 14 bits available */
+  RANGE_CHECK(cfg, g_timebase.den,        1, 1000000000);
+  RANGE_CHECK(cfg, g_timebase.num,        1, cfg->g_timebase.den);
+  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_HI(cfg, g_threads,          64);
+  RANGE_CHECK_HI(cfg, g_lag_in_frames,    MAX_LAG_BUFFERS);
+  RANGE_CHECK(cfg, rc_end_usage,          VPX_VBR, VPX_CQ);
+  RANGE_CHECK_HI(cfg, rc_undershoot_pct,  1000);
+  RANGE_CHECK_HI(cfg, rc_overshoot_pct,   1000);
+  RANGE_CHECK_HI(cfg, rc_2pass_vbr_bias_pct, 100);
+  RANGE_CHECK(cfg, kf_mode,               VPX_KF_DISABLED, VPX_KF_AUTO);
+  // RANGE_CHECK_BOOL(cfg,                 g_delete_firstpassfile);
+  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);
+  RANGE_CHECK(cfg,        g_pass,         VPX_RC_ONE_PASS, VPX_RC_LAST_PASS);
+
+  /* VP8 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_BOOL(vp8_cfg,               enable_auto_alt_ref);
+  RANGE_CHECK(vp8_cfg, cpu_used,           -16, 16);
+
+  RANGE_CHECK(vp8_cfg, encoding_mode,      VP8_BEST_QUALITY_ENCODING, VP8_REAL_TIME_ENCODING);
+  RANGE_CHECK_HI(vp8_cfg, noise_sensitivity,  6);
+
+  RANGE_CHECK(vp8_cfg, token_partitions,   VP8_ONE_TOKENPARTITION, VP8_EIGHT_TOKENPARTITION);
+  RANGE_CHECK_HI(vp8_cfg, Sharpness,       7);
+  RANGE_CHECK(vp8_cfg, arnr_max_frames, 0, 15);
+  RANGE_CHECK_HI(vp8_cfg, arnr_strength,   6);
+  RANGE_CHECK(vp8_cfg, arnr_type,       1, 3);
+  RANGE_CHECK(vp8_cfg, cq_level, 0, 63);
+
+  if (cfg->g_pass == VPX_RC_LAST_PASS) {
+    size_t           packet_sz = sizeof(FIRSTPASS_STATS);
+    int              n_packets = cfg->rc_twopass_stats_in.sz / packet_sz;
+    FIRSTPASS_STATS *stats;
+
+    if (!cfg->rc_twopass_stats_in.buf)
+      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->rc_twopass_stats_in.sz < 2 * packet_sz)
+      ERROR("rc_twopass_stats_in requires at least two packets.");
+
+    stats = (void *)((char *)cfg->rc_twopass_stats_in.buf
+                     + (n_packets - 1) * packet_sz);
+
+    if ((int)(stats->count + 0.5) != n_packets - 1)
+      ERROR("rc_twopass_stats_in missing EOS stats packet");
+  }
+
+  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_VPXI420:
+    case VPX_IMG_FMT_VPXYV12:
+      break;
+    default:
+      ERROR("Invalid image format. Only YV12 and I420 images are supported");
+  }
+
+  if ((img->d_w != ctx->cfg.g_w) || (img->d_h != ctx->cfg.g_h))
+    ERROR("Image size must match encoder init configuration size");
+
+  return VPX_CODEC_OK;
+}
+
+
+static vpx_codec_err_t set_vp8e_config(VP9_CONFIG *oxcf,
+                                       vpx_codec_enc_cfg_t cfg,
+                                       struct vp8_extracfg vp8_cfg) {
+  oxcf->Version               = cfg.g_profile;
+  oxcf->Version              |= vp8_cfg.experimental ? 0x4 : 0;
+
+  oxcf->Width                 = cfg.g_w;
+  oxcf->Height                = cfg.g_h;
+  /* guess a frame rate if out of whack, use 30 */
+  oxcf->frame_rate             = (double)(cfg.g_timebase.den) / (double)(cfg.g_timebase.num);
+
+  if (oxcf->frame_rate > 180) {
+    oxcf->frame_rate = 30;
+  }
+
+  switch (cfg.g_pass) {
+    case VPX_RC_ONE_PASS:
+      oxcf->Mode = MODE_BESTQUALITY;
+      break;
+    case VPX_RC_FIRST_PASS:
+      oxcf->Mode = MODE_FIRSTPASS;
+      break;
+    case VPX_RC_LAST_PASS:
+      oxcf->Mode = MODE_SECONDPASS_BEST;
+      break;
+  }
+
+  if (cfg.g_pass == VPX_RC_FIRST_PASS) {
+    oxcf->allow_lag              = 0;
+    oxcf->lag_in_frames           = 0;
+  } else {
+    oxcf->allow_lag              = (cfg.g_lag_in_frames) > 0;
+    oxcf->lag_in_frames           = cfg.g_lag_in_frames;
+  }
+
+  // VBR only supported for now.
+  // CBR code has been deprectated for experimental phase.
+  // CQ mode not yet tested
+  oxcf->end_usage          = USAGE_LOCAL_FILE_PLAYBACK;
+  /*if (cfg.rc_end_usage == VPX_CQ)
+      oxcf->end_usage      = USAGE_CONSTRAINED_QUALITY;
+  else
+      oxcf->end_usage      = USAGE_LOCAL_FILE_PLAYBACK;*/
+
+  oxcf->target_bandwidth       = cfg.rc_target_bitrate;
+  oxcf->rc_max_intra_bitrate_pct = vp8_cfg.rc_max_intra_bitrate_pct;
+
+  oxcf->best_allowed_q          = cfg.rc_min_quantizer;
+  oxcf->worst_allowed_q         = cfg.rc_max_quantizer;
+  oxcf->cq_level                = vp8_cfg.cq_level;
+  oxcf->fixed_q = -1;
+
+  oxcf->under_shoot_pct         = cfg.rc_undershoot_pct;
+  oxcf->over_shoot_pct          = cfg.rc_overshoot_pct;
+
+  oxcf->maximum_buffer_size     = cfg.rc_buf_sz;
+  oxcf->starting_buffer_level   = cfg.rc_buf_initial_sz;
+  oxcf->optimal_buffer_level    = cfg.rc_buf_optimal_sz;
+
+  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->auto_key               = cfg.kf_mode == VPX_KF_AUTO
+                                 && cfg.kf_min_dist != cfg.kf_max_dist;
+  // oxcf->kf_min_dist         = cfg.kf_min_dis;
+  oxcf->key_freq               = cfg.kf_max_dist;
+
+  // oxcf->delete_first_pass_file = cfg.g_delete_firstpassfile;
+  // strcpy(oxcf->first_pass_file, cfg.g_firstpass_file);
+
+  oxcf->cpu_used               =  vp8_cfg.cpu_used;
+  oxcf->encode_breakout        =  vp8_cfg.static_thresh;
+  oxcf->play_alternate         =  vp8_cfg.enable_auto_alt_ref;
+  oxcf->noise_sensitivity      =  vp8_cfg.noise_sensitivity;
+  oxcf->Sharpness             =  vp8_cfg.Sharpness;
+
+  oxcf->two_pass_stats_in        =  cfg.rc_twopass_stats_in;
+  oxcf->output_pkt_list         =  vp8_cfg.pkt_list;
+
+  oxcf->arnr_max_frames = vp8_cfg.arnr_max_frames;
+  oxcf->arnr_strength =  vp8_cfg.arnr_strength;
+  oxcf->arnr_type =      vp8_cfg.arnr_type;
+
+  oxcf->tuning = vp8_cfg.tuning;
+
+#if CONFIG_LOSSLESS
+  oxcf->lossless = cfg.lossless;
+#endif
+
+  /*
+      printf("Current VP8 Settings: \n");
+      printf("target_bandwidth: %d\n", oxcf->target_bandwidth);
+      printf("noise_sensitivity: %d\n", oxcf->noise_sensitivity);
+      printf("Sharpness: %d\n",    oxcf->Sharpness);
+      printf("cpu_used: %d\n",  oxcf->cpu_used);
+      printf("Mode: %d\n",     oxcf->Mode);
+      printf("delete_first_pass_file: %d\n",  oxcf->delete_first_pass_file);
+      printf("auto_key: %d\n",  oxcf->auto_key);
+      printf("key_freq: %d\n", oxcf->key_freq);
+      printf("end_usage: %d\n", oxcf->end_usage);
+      printf("under_shoot_pct: %d\n", oxcf->under_shoot_pct);
+      printf("over_shoot_pct: %d\n", oxcf->over_shoot_pct);
+      printf("starting_buffer_level: %d\n", oxcf->starting_buffer_level);
+      printf("optimal_buffer_level: %d\n",  oxcf->optimal_buffer_level);
+      printf("maximum_buffer_size: %d\n", oxcf->maximum_buffer_size);
+      printf("fixed_q: %d\n",  oxcf->fixed_q);
+      printf("worst_allowed_q: %d\n", oxcf->worst_allowed_q);
+      printf("best_allowed_q: %d\n", oxcf->best_allowed_q);
+      printf("two_pass_vbrbias: %d\n",  oxcf->two_pass_vbrbias);
+      printf("two_pass_vbrmin_section: %d\n", oxcf->two_pass_vbrmin_section);
+      printf("two_pass_vbrmax_section: %d\n", oxcf->two_pass_vbrmax_section);
+      printf("allow_lag: %d\n", oxcf->allow_lag);
+      printf("lag_in_frames: %d\n", oxcf->lag_in_frames);
+      printf("play_alternate: %d\n", oxcf->play_alternate);
+      printf("Version: %d\n", oxcf->Version);
+      printf("encode_breakout: %d\n", oxcf->encode_breakout);
+  */
+  return VPX_CODEC_OK;
+}
+
+static vpx_codec_err_t vp8e_set_config(vpx_codec_alg_priv_t       *ctx,
+                                       const vpx_codec_enc_cfg_t  *cfg) {
+  vpx_codec_err_t res;
+
+  if ((cfg->g_w != ctx->cfg.g_w) || (cfg->g_h != ctx->cfg.g_h))
+    ERROR("Cannot change width or height after initialization");
+
+  /* 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->vp8_cfg);
+
+  if (!res) {
+    ctx->cfg = *cfg;
+    set_vp8e_config(&ctx->oxcf, ctx->cfg, ctx->vp8_cfg);
+    vp9_change_config(ctx->cpi, &ctx->oxcf);
+  }
+
+  return res;
+}
+
+
+int vp9_reverse_trans(int q);
+
+
+static vpx_codec_err_t get_param(vpx_codec_alg_priv_t *ctx,
+                                 int                   ctrl_id,
+                                 va_list               args) {
+  void *arg = va_arg(args, void *);
+
+#define MAP(id, var) case id: *(RECAST(id, arg)) = var; break
+
+  if (!arg)
+    return VPX_CODEC_INVALID_PARAM;
+
+  switch (ctrl_id) {
+      MAP(VP8E_GET_LAST_QUANTIZER, vp9_get_quantizer(ctx->cpi));
+      MAP(VP8E_GET_LAST_QUANTIZER_64,
+          vp9_reverse_trans(vp9_get_quantizer(ctx->cpi)));
+  }
+
+  return VPX_CODEC_OK;
+#undef MAP
+}
+
+
+static vpx_codec_err_t set_param(vpx_codec_alg_priv_t *ctx,
+                                 int                   ctrl_id,
+                                 va_list               args) {
+  vpx_codec_err_t     res  = VPX_CODEC_OK;
+  struct vp8_extracfg xcfg = ctx->vp8_cfg;
+
+#define MAP(id, var) case id: var = CAST(id, args); break;
+
+  switch (ctrl_id) {
+      MAP(VP8E_SET_ENCODING_MODE,         ctx->deprecated_mode);
+      MAP(VP8E_SET_CPUUSED,               xcfg.cpu_used);
+      MAP(VP8E_SET_ENABLEAUTOALTREF,      xcfg.enable_auto_alt_ref);
+      MAP(VP8E_SET_NOISE_SENSITIVITY,     xcfg.noise_sensitivity);
+      MAP(VP8E_SET_SHARPNESS,             xcfg.Sharpness);
+      MAP(VP8E_SET_STATIC_THRESHOLD,      xcfg.static_thresh);
+      MAP(VP8E_SET_TOKEN_PARTITIONS,      xcfg.token_partitions);
+
+      MAP(VP8E_SET_ARNR_MAXFRAMES,        xcfg.arnr_max_frames);
+      MAP(VP8E_SET_ARNR_STRENGTH,        xcfg.arnr_strength);
+      MAP(VP8E_SET_ARNR_TYPE,        xcfg.arnr_type);
+      MAP(VP8E_SET_TUNING,                xcfg.tuning);
+      MAP(VP8E_SET_CQ_LEVEL,              xcfg.cq_level);
+      MAP(VP8E_SET_MAX_INTRA_BITRATE_PCT, xcfg.rc_max_intra_bitrate_pct);
+
+  }
+
+  res = validate_config(ctx, &ctx->cfg, &xcfg);
+
+  if (!res) {
+    ctx->vp8_cfg = xcfg;
+    set_vp8e_config(&ctx->oxcf, ctx->cfg, ctx->vp8_cfg);
+    vp9_change_config(ctx->cpi, &ctx->oxcf);
+  }
+
+  return res;
+#undef MAP
+}
+
+
+static vpx_codec_err_t vp8e_common_init(vpx_codec_ctx_t *ctx,
+                                        int              experimental) {
+  vpx_codec_err_t        res = VPX_DEC_OK;
+  struct vpx_codec_alg_priv *priv;
+  vpx_codec_enc_cfg_t       *cfg;
+  unsigned int               i;
+
+  VP9_PTR optr;
+
+  if (!ctx->priv) {
+    priv = calloc(1, sizeof(struct vpx_codec_alg_priv));
+
+    if (!priv) {
+      return VPX_CODEC_MEM_ERROR;
+    }
+
+    ctx->priv = &priv->base;
+    ctx->priv->sz = sizeof(*ctx->priv);
+    ctx->priv->iface = ctx->iface;
+    ctx->priv->alg_priv = priv;
+    ctx->priv->init_flags = ctx->init_flags;
+
+    if (ctx->config.enc) {
+      /* Update the reference to the config structure to an
+       * internal copy.
+       */
+      ctx->priv->alg_priv->cfg = *ctx->config.enc;
+      ctx->config.enc = &ctx->priv->alg_priv->cfg;
+    }
+
+    cfg =  &ctx->priv->alg_priv->cfg;
+
+    /* Select the extra vp6 configuration table based on the current
+     * usage value. If the current usage value isn't found, use the
+     * values for usage case 0.
+     */
+    for (i = 0;
+         extracfg_map[i].usage && extracfg_map[i].usage != cfg->g_usage;
+         i++);
+
+    priv->vp8_cfg = extracfg_map[i].cfg;
+    priv->vp8_cfg.pkt_list = &priv->pkt_list.head;
+    priv->vp8_cfg.experimental = experimental;
+
+    priv->cx_data_sz = priv->cfg.g_w * priv->cfg.g_h * 3 / 2 * 2;
+
+    if (priv->cx_data_sz < 4096) priv->cx_data_sz = 4096;
+
+    priv->cx_data = malloc(priv->cx_data_sz);
+
+    if (!priv->cx_data) {
+      return VPX_CODEC_MEM_ERROR;
+    }
+
+    priv->deprecated_mode = NO_MODE_SET;
+
+    vp9_initialize_enc();
+
+    res = validate_config(priv, &priv->cfg, &priv->vp8_cfg);
+
+    if (!res) {
+      set_vp8e_config(&ctx->priv->alg_priv->oxcf,
+                      ctx->priv->alg_priv->cfg,
+                      ctx->priv->alg_priv->vp8_cfg);
+      optr = vp9_create_compressor(&ctx->priv->alg_priv->oxcf);
+
+      if (!optr)
+        res = VPX_CODEC_MEM_ERROR;
+      else
+        ctx->priv->alg_priv->cpi = optr;
+    }
+  }
+
+  return res;
+}
+
+
+static vpx_codec_err_t vp8e_init(vpx_codec_ctx_t *ctx) {
+  return vp8e_common_init(ctx, 0);
+}
+
+
+#if CONFIG_EXPERIMENTAL
+static vpx_codec_err_t vp8e_exp_init(vpx_codec_ctx_t *ctx) {
+  return vp8e_common_init(ctx, 1);
+}
+#endif
+
+
+static vpx_codec_err_t vp8e_destroy(vpx_codec_alg_priv_t *ctx) {
+
+  free(ctx->cx_data);
+  vp9_remove_compressor(&ctx->cpi);
+  free(ctx);
+  return VPX_CODEC_OK;
+}
+
+static vpx_codec_err_t image2yuvconfig(const vpx_image_t   *img,
+                                       YV12_BUFFER_CONFIG  *yv12) {
+  vpx_codec_err_t        res = VPX_CODEC_OK;
+  yv12->y_buffer = img->planes[VPX_PLANE_Y];
+  yv12->u_buffer = img->planes[VPX_PLANE_U];
+  yv12->v_buffer = img->planes[VPX_PLANE_V];
+
+  yv12->y_width  = img->d_w;
+  yv12->y_height = img->d_h;
+  yv12->uv_width = (1 + yv12->y_width) / 2;
+  yv12->uv_height = (1 + yv12->y_height) / 2;
+
+  yv12->y_stride = img->stride[VPX_PLANE_Y];
+  yv12->uv_stride = img->stride[VPX_PLANE_U];
+
+  yv12->border  = (img->stride[VPX_PLANE_Y] - img->w) / 2;
+  yv12->clrtype = (img->fmt == VPX_IMG_FMT_VPXI420 || img->fmt == VPX_IMG_FMT_VPXYV12); // REG_YUV = 0
+  return res;
+}
+
+static void pick_quickcompress_mode(vpx_codec_alg_priv_t  *ctx,
+                                    unsigned long          duration,
+                                    unsigned long          deadline) {
+  unsigned int new_qc;
+
+  /* Use best quality mode if no deadline is given. */
+  if (deadline)
+    new_qc = MODE_GOODQUALITY;
+  else
+    new_qc = MODE_BESTQUALITY;
+
+  if (ctx->cfg.g_pass == VPX_RC_FIRST_PASS)
+    new_qc = MODE_FIRSTPASS;
+  else if (ctx->cfg.g_pass == VPX_RC_LAST_PASS)
+    new_qc = (new_qc == MODE_BESTQUALITY)
+             ? MODE_SECONDPASS_BEST
+             : MODE_SECONDPASS;
+
+  if (ctx->oxcf.Mode != new_qc) {
+    ctx->oxcf.Mode = new_qc;
+    vp9_change_config(ctx->cpi, &ctx->oxcf);
+  }
+}
+
+
+static vpx_codec_err_t vp8e_encode(vpx_codec_alg_priv_t  *ctx,
+                                   const vpx_image_t     *img,
+                                   vpx_codec_pts_t        pts,
+                                   unsigned long          duration,
+                                   vpx_enc_frame_flags_t  flags,
+                                   unsigned long          deadline) {
+  vpx_codec_err_t res = VPX_CODEC_OK;
+
+  if (img)
+    res = validate_img(ctx, img);
+
+  pick_quickcompress_mode(ctx, duration, deadline);
+  vpx_codec_pkt_list_init(&ctx->pkt_list);
+
+  /* Handle Flags */
+  if (((flags & VP8_EFLAG_NO_UPD_GF) && (flags & VP8_EFLAG_FORCE_GF))
+      || ((flags & VP8_EFLAG_NO_UPD_ARF) && (flags & VP8_EFLAG_FORCE_ARF))) {
+    ctx->base.err_detail = "Conflicting flags.";
+    return VPX_CODEC_INVALID_PARAM;
+  }
+
+  if (flags & (VP8_EFLAG_NO_REF_LAST | VP8_EFLAG_NO_REF_GF
+               | VP8_EFLAG_NO_REF_ARF)) {
+    int ref = 7;
+
+    if (flags & VP8_EFLAG_NO_REF_LAST)
+      ref ^= VP9_LAST_FLAG;
+
+    if (flags & VP8_EFLAG_NO_REF_GF)
+      ref ^= VP9_GOLD_FLAG;
+
+    if (flags & VP8_EFLAG_NO_REF_ARF)
+      ref ^= VP9_ALT_FLAG;
+
+    vp9_use_as_reference(ctx->cpi, ref);
+  }
+
+  if (flags & (VP8_EFLAG_NO_UPD_LAST | VP8_EFLAG_NO_UPD_GF
+               | VP8_EFLAG_NO_UPD_ARF | VP8_EFLAG_FORCE_GF
+               | VP8_EFLAG_FORCE_ARF)) {
+    int upd = 7;
+
+    if (flags & VP8_EFLAG_NO_UPD_LAST)
+      upd ^= VP9_LAST_FLAG;
+
+    if (flags & VP8_EFLAG_NO_UPD_GF)
+      upd ^= VP9_GOLD_FLAG;
+
+    if (flags & VP8_EFLAG_NO_UPD_ARF)
+      upd ^= VP9_ALT_FLAG;
+
+    vp9_update_reference(ctx->cpi, upd);
+  }
+
+  if (flags & VP8_EFLAG_NO_UPD_ENTROPY) {
+    vp9_update_entropy(ctx->cpi, 0);
+  }
+
+  /* Handle fixed keyframe intervals */
+  if (ctx->cfg.kf_mode == VPX_KF_AUTO
+      && ctx->cfg.kf_min_dist == ctx->cfg.kf_max_dist) {
+    if (++ctx->fixed_kf_cntr > ctx->cfg.kf_min_dist) {
+      flags |= VPX_EFLAG_FORCE_KF;
+      ctx->fixed_kf_cntr = 1;
+    }
+  }
+
+  /* Initialize the encoder instance on the first frame*/
+  if (!res && ctx->cpi) {
+    unsigned int lib_flags;
+    YV12_BUFFER_CONFIG sd;
+    int64_t dst_time_stamp, dst_end_time_stamp;
+    unsigned long size, cx_data_sz;
+    unsigned char *cx_data;
+
+    /* Set up internal flags */
+    if (ctx->base.init_flags & VPX_CODEC_USE_PSNR)
+      ((VP9_COMP *)ctx->cpi)->b_calculate_psnr = 1;
+
+    // if (ctx->base.init_flags & VPX_CODEC_USE_OUTPUT_PARTITION)
+    //    ((VP9_COMP *)ctx->cpi)->output_partition = 1;
+
+    /* Convert API flags to internal codec lib flags */
+    lib_flags = (flags & VPX_EFLAG_FORCE_KF) ? FRAMEFLAGS_KEY : 0;
+
+    /* vp8 use 10,000,000 ticks/second as time stamp */
+    dst_time_stamp    = pts * 10000000 * ctx->cfg.g_timebase.num / ctx->cfg.g_timebase.den;
+    dst_end_time_stamp = (pts + duration) * 10000000 * ctx->cfg.g_timebase.num / ctx->cfg.g_timebase.den;
+
+    if (img != NULL) {
+      res = image2yuvconfig(img, &sd);
+
+      if (vp9_receive_raw_frame(ctx->cpi, ctx->next_frame_flag | lib_flags,
+                                &sd, dst_time_stamp, dst_end_time_stamp)) {
+        VP9_COMP *cpi = (VP9_COMP *)ctx->cpi;
+        res = update_error_state(ctx, &cpi->common.error);
+      }
+
+      /* reset for next frame */
+      ctx->next_frame_flag = 0;
+    }
+
+    cx_data = ctx->cx_data;
+    cx_data_sz = ctx->cx_data_sz;
+    lib_flags = 0;
+
+    while (cx_data_sz >= ctx->cx_data_sz / 2 &&
+           -1 != vp9_get_compressed_data(ctx->cpi, &lib_flags, &size,
+                                         cx_data, &dst_time_stamp,
+                                         &dst_end_time_stamp, !img)) {
+      if (size) {
+        vpx_codec_pts_t    round, delta;
+        vpx_codec_cx_pkt_t pkt;
+        VP9_COMP *cpi = (VP9_COMP *)ctx->cpi;
+
+        /* Add the frame packet to the list of returned packets. */
+        round = 1000000 * ctx->cfg.g_timebase.num / 2 - 1;
+        delta = (dst_end_time_stamp - dst_time_stamp);
+        pkt.kind = VPX_CODEC_CX_FRAME_PKT;
+        pkt.data.frame.pts =
+          (dst_time_stamp * ctx->cfg.g_timebase.den + round)
+          / ctx->cfg.g_timebase.num / 10000000;
+        pkt.data.frame.duration =
+          (delta * ctx->cfg.g_timebase.den + round)
+          / ctx->cfg.g_timebase.num / 10000000;
+        pkt.data.frame.flags = lib_flags << 16;
+
+        if (lib_flags & FRAMEFLAGS_KEY)
+          pkt.data.frame.flags |= VPX_FRAME_IS_KEY;
+
+        if (!cpi->common.show_frame) {
+          pkt.data.frame.flags |= VPX_FRAME_IS_INVISIBLE;
+
+          // This timestamp should be as close as possible to the
+          // prior PTS so that if a decoder uses pts to schedule when
+          // to do this, we start right after last frame was decoded.
+          // Invisible frames have no duration.
+          pkt.data.frame.pts = ((cpi->last_time_stamp_seen
+                                 * ctx->cfg.g_timebase.den + round)
+                                / ctx->cfg.g_timebase.num / 10000000) + 1;
+          pkt.data.frame.duration = 0;
+        }
+
+        if (cpi->droppable)
+          pkt.data.frame.flags |= VPX_FRAME_IS_DROPPABLE;
+
+        /*if (cpi->output_partition)
+        {
+            int i;
+            const int num_partitions = 1;
+
+            pkt.data.frame.flags |= VPX_FRAME_IS_FRAGMENT;
+
+            for (i = 0; i < num_partitions; ++i)
+            {
+                pkt.data.frame.buf = cx_data;
+                pkt.data.frame.sz = cpi->partition_sz[i];
+                pkt.data.frame.partition_id = i;
+                // don't set the fragment bit for the last partition
+                if (i == (num_partitions - 1))
+                    pkt.data.frame.flags &= ~VPX_FRAME_IS_FRAGMENT;
+                vpx_codec_pkt_list_add(&ctx->pkt_list.head, &pkt);
+                cx_data += cpi->partition_sz[i];
+                cx_data_sz -= cpi->partition_sz[i];
+            }
+        }
+        else*/
+        {
+          pkt.data.frame.buf = cx_data;
+          pkt.data.frame.sz  = size;
+          pkt.data.frame.partition_id = -1;
+          vpx_codec_pkt_list_add(&ctx->pkt_list.head, &pkt);
+          cx_data += size;
+          cx_data_sz -= size;
+        }
+
+        // printf("timestamp: %lld, duration: %d\n", pkt->data.frame.pts, pkt->data.frame.duration);
+      }
+    }
+  }
+
+  return res;
+}
+
+
+static const vpx_codec_cx_pkt_t *vp8e_get_cxdata(vpx_codec_alg_priv_t  *ctx,
+                                                 vpx_codec_iter_t      *iter) {
+  return vpx_codec_pkt_list_get(&ctx->pkt_list.head, iter);
+}
+
+static vpx_codec_err_t vp8e_set_reference(vpx_codec_alg_priv_t *ctx,
+                                          int ctr_id,
+                                          va_list args) {
+  vpx_ref_frame_t *data = va_arg(args, vpx_ref_frame_t *);
+
+  if (data) {
+    vpx_ref_frame_t *frame = (vpx_ref_frame_t *)data;
+    YV12_BUFFER_CONFIG sd;
+
+    image2yuvconfig(&frame->img, &sd);
+    vp9_set_reference_enc(ctx->cpi, frame->frame_type, &sd);
+    return VPX_CODEC_OK;
+  } else
+    return VPX_CODEC_INVALID_PARAM;
+
+}
+
+static vpx_codec_err_t vp8e_get_reference(vpx_codec_alg_priv_t *ctx,
+                                          int ctr_id,
+                                          va_list args) {
+
+  vpx_ref_frame_t *data = va_arg(args, vpx_ref_frame_t *);
+
+  if (data) {
+    vpx_ref_frame_t *frame = (vpx_ref_frame_t *)data;
+    YV12_BUFFER_CONFIG sd;
+
+    image2yuvconfig(&frame->img, &sd);
+    vp9_get_reference_enc(ctx->cpi, frame->frame_type, &sd);
+    return VPX_CODEC_OK;
+  } else
+    return VPX_CODEC_INVALID_PARAM;
+}
+
+static vpx_codec_err_t vp8e_set_previewpp(vpx_codec_alg_priv_t *ctx,
+                                          int ctr_id,
+                                          va_list args) {
+#if CONFIG_POSTPROC
+  vp8_postproc_cfg_t *data = va_arg(args, vp8_postproc_cfg_t *);
+  (void)ctr_id;
+
+  if (data) {
+    ctx->preview_ppcfg = *((vp8_postproc_cfg_t *)data);
+    return VPX_CODEC_OK;
+  } else
+    return VPX_CODEC_INVALID_PARAM;
+#else
+  (void)ctx;
+  (void)ctr_id;
+  (void)args;
+  return VPX_CODEC_INCAPABLE;
+#endif
+}
+
+
+static vpx_image_t *vp8e_get_preview(vpx_codec_alg_priv_t *ctx) {
+
+  YV12_BUFFER_CONFIG sd;
+  vp9_ppflags_t flags = {0};
+
+  if (ctx->preview_ppcfg.post_proc_flag) {
+    flags.post_proc_flag        = ctx->preview_ppcfg.post_proc_flag;
+    flags.deblocking_level      = ctx->preview_ppcfg.deblocking_level;
+    flags.noise_level           = ctx->preview_ppcfg.noise_level;
+  }
+
+  if (0 == vp9_get_preview_raw_frame(ctx->cpi, &sd, &flags)) {
+
+    /*
+    vpx_img_wrap(&ctx->preview_img, VPX_IMG_FMT_YV12,
+        sd.y_width + 2*VP8BORDERINPIXELS,
+        sd.y_height + 2*VP8BORDERINPIXELS,
+        1,
+        sd.buffer_alloc);
+    vpx_img_set_rect(&ctx->preview_img,
+        VP8BORDERINPIXELS, VP8BORDERINPIXELS,
+        sd.y_width, sd.y_height);
+        */
+
+    ctx->preview_img.bps = 12;
+    ctx->preview_img.planes[VPX_PLANE_Y] = sd.y_buffer;
+    ctx->preview_img.planes[VPX_PLANE_U] = sd.u_buffer;
+    ctx->preview_img.planes[VPX_PLANE_V] = sd.v_buffer;
+
+    if (sd.clrtype == REG_YUV)
+      ctx->preview_img.fmt = VPX_IMG_FMT_I420;
+    else
+      ctx->preview_img.fmt = VPX_IMG_FMT_VPXI420;
+
+    ctx->preview_img.x_chroma_shift = 1;
+    ctx->preview_img.y_chroma_shift = 1;
+
+    ctx->preview_img.d_w = sd.y_width;
+    ctx->preview_img.d_h = sd.y_height;
+    ctx->preview_img.stride[VPX_PLANE_Y] = sd.y_stride;
+    ctx->preview_img.stride[VPX_PLANE_U] = sd.uv_stride;
+    ctx->preview_img.stride[VPX_PLANE_V] = sd.uv_stride;
+    ctx->preview_img.w   = sd.y_width;
+    ctx->preview_img.h   = sd.y_height;
+
+    return &ctx->preview_img;
+  } else
+    return NULL;
+}
+
+static vpx_codec_err_t vp8e_update_entropy(vpx_codec_alg_priv_t *ctx,
+                                           int ctr_id,
+                                           va_list args) {
+  int update = va_arg(args, int);
+  vp9_update_entropy(ctx->cpi, update);
+  return VPX_CODEC_OK;
+
+}
+
+static vpx_codec_err_t vp8e_update_reference(vpx_codec_alg_priv_t *ctx,
+                                             int ctr_id,
+                                             va_list args) {
+  int update = va_arg(args, int);
+  vp9_update_reference(ctx->cpi, update);
+  return VPX_CODEC_OK;
+}
+
+static vpx_codec_err_t vp8e_use_reference(vpx_codec_alg_priv_t *ctx,
+                                          int ctr_id,
+                                          va_list args) {
+  int reference_flag = va_arg(args, int);
+  vp9_use_as_reference(ctx->cpi, reference_flag);
+  return VPX_CODEC_OK;
+}
+
+static vpx_codec_err_t vp8e_set_roi_map(vpx_codec_alg_priv_t *ctx,
+                                        int ctr_id,
+                                        va_list args) {
+  vpx_roi_map_t *data = va_arg(args, vpx_roi_map_t *);
+
+  if (data) {
+    vpx_roi_map_t *roi = (vpx_roi_map_t *)data;
+
+    if (!vp9_set_roimap(ctx->cpi, roi->roi_map, roi->rows, roi->cols,
+                        roi->delta_q, roi->delta_lf, roi->static_threshold))
+      return VPX_CODEC_OK;
+    else
+      return VPX_CODEC_INVALID_PARAM;
+  } else
+    return VPX_CODEC_INVALID_PARAM;
+}
+
+
+static vpx_codec_err_t vp8e_set_activemap(vpx_codec_alg_priv_t *ctx,
+                                          int ctr_id,
+                                          va_list args) {
+  vpx_active_map_t *data = va_arg(args, vpx_active_map_t *);
+
+  if (data) {
+
+    vpx_active_map_t *map = (vpx_active_map_t *)data;
+
+    if (!vp9_set_active_map(ctx->cpi, map->active_map, map->rows, map->cols))
+      return VPX_CODEC_OK;
+    else
+      return VPX_CODEC_INVALID_PARAM;
+  } else
+    return VPX_CODEC_INVALID_PARAM;
+}
+
+static vpx_codec_err_t vp8e_set_scalemode(vpx_codec_alg_priv_t *ctx,
+                                          int ctr_id,
+                                          va_list args) {
+
+  vpx_scaling_mode_t *data =  va_arg(args, vpx_scaling_mode_t *);
+
+  if (data) {
+    int res;
+    vpx_scaling_mode_t scalemode = *(vpx_scaling_mode_t *)data;
+    res = vp9_set_internal_size(ctx->cpi, scalemode.h_scaling_mode,
+                                scalemode.v_scaling_mode);
+
+    if (!res) {
+      /*force next frame a key frame to effect scaling mode */
+      ctx->next_frame_flag |= FRAMEFLAGS_KEY;
+      return VPX_CODEC_OK;
+    } else
+      return VPX_CODEC_INVALID_PARAM;
+  } else
+    return VPX_CODEC_INVALID_PARAM;
+}
+
+
+static vpx_codec_ctrl_fn_map_t vp8e_ctf_maps[] = {
+  {VP8_SET_REFERENCE,                 vp8e_set_reference},
+  {VP8_COPY_REFERENCE,                vp8e_get_reference},
+  {VP8_SET_POSTPROC,                  vp8e_set_previewpp},
+  {VP8E_UPD_ENTROPY,                  vp8e_update_entropy},
+  {VP8E_UPD_REFERENCE,                vp8e_update_reference},
+  {VP8E_USE_REFERENCE,                vp8e_use_reference},
+  {VP8E_SET_ROI_MAP,                  vp8e_set_roi_map},
+  {VP8E_SET_ACTIVEMAP,                vp8e_set_activemap},
+  {VP8E_SET_SCALEMODE,                vp8e_set_scalemode},
+  {VP8E_SET_ENCODING_MODE,            set_param},
+  {VP8E_SET_CPUUSED,                  set_param},
+  {VP8E_SET_NOISE_SENSITIVITY,        set_param},
+  {VP8E_SET_ENABLEAUTOALTREF,         set_param},
+  {VP8E_SET_SHARPNESS,                set_param},
+  {VP8E_SET_STATIC_THRESHOLD,         set_param},
+  {VP8E_SET_TOKEN_PARTITIONS,         set_param},
+  {VP8E_GET_LAST_QUANTIZER,           get_param},
+  {VP8E_GET_LAST_QUANTIZER_64,        get_param},
+  {VP8E_SET_ARNR_MAXFRAMES,           set_param},
+  {VP8E_SET_ARNR_STRENGTH,           set_param},
+  {VP8E_SET_ARNR_TYPE,           set_param},
+  {VP8E_SET_TUNING,                   set_param},
+  {VP8E_SET_CQ_LEVEL,                 set_param},
+  {VP8E_SET_MAX_INTRA_BITRATE_PCT,    set_param},
+  { -1, NULL},
+};
+
+static vpx_codec_enc_cfg_map_t vp8e_usage_cfg_map[] = {
+  {
+    0,
+    {
+      0,                  /* g_usage */
+      0,                  /* g_threads */
+      0,                  /* g_profile */
+
+      320,                /* g_width */
+      240,                /* g_height */
+      {1, 30},            /* g_timebase */
+
+      0,                  /* g_error_resilient */
+
+      VPX_RC_ONE_PASS,    /* g_pass */
+
+      0,                  /* g_lag_in_frames */
+
+      0,                  /* rc_dropframe_thresh */
+      0,                  /* rc_resize_allowed */
+      60,                 /* rc_resize_down_thresold */
+      30,                 /* rc_resize_up_thresold */
+
+      VPX_VBR,            /* rc_end_usage */
+#if VPX_ENCODER_ABI_VERSION > (1 + VPX_CODEC_ABI_VERSION)
+      {0},                /* rc_twopass_stats_in */
+#endif
+      256,                /* rc_target_bandwidth */
+      4,                  /* rc_min_quantizer */
+      63,                 /* rc_max_quantizer */
+      100,                /* rc_undershoot_pct */
+      100,                /* rc_overshoot_pct */
+
+      6000,               /* rc_max_buffer_size */
+      4000,               /* rc_buffer_initial_size; */
+      5000,               /* rc_buffer_optimal_size; */
+
+      50,                 /* rc_two_pass_vbrbias  */
+      0,                  /* rc_two_pass_vbrmin_section */
+      400,                /* rc_two_pass_vbrmax_section */
+
+      /* keyframing settings (kf) */
+      VPX_KF_AUTO,        /* g_kfmode*/
+      0,                  /* kf_min_dist */
+      9999,               /* kf_max_dist */
+
+#if VPX_ENCODER_ABI_VERSION == (1 + VPX_CODEC_ABI_VERSION)
+      1,                  /* g_delete_first_pass_file */
+      "vp8.fpf"           /* first pass filename */
+#endif
+    }
+  },
+  { -1, {NOT_IMPLEMENTED}}
+};
+
+
+#ifndef VERSION_STRING
+#define VERSION_STRING
+#endif
+CODEC_INTERFACE(vpx_codec_vp8_cx) = {
+  "WebM Project VP8 Encoder" VERSION_STRING,
+  VPX_CODEC_INTERNAL_ABI_VERSION,
+  VPX_CODEC_CAP_ENCODER | VPX_CODEC_CAP_PSNR |
+  VPX_CODEC_CAP_OUTPUT_PARTITION,
+  /* vpx_codec_caps_t          caps; */
+  vp8e_init,          /* vpx_codec_init_fn_t       init; */
+  vp8e_destroy,       /* vpx_codec_destroy_fn_t    destroy; */
+  vp8e_ctf_maps,      /* vpx_codec_ctrl_fn_map_t  *ctrl_maps; */
+  NOT_IMPLEMENTED,    /* vpx_codec_get_mmap_fn_t   get_mmap; */
+  NOT_IMPLEMENTED,    /* vpx_codec_set_mmap_fn_t   set_mmap; */
+  {
+    NOT_IMPLEMENTED,    /* vpx_codec_peek_si_fn_t    peek_si; */
+    NOT_IMPLEMENTED,    /* vpx_codec_get_si_fn_t     get_si; */
+    NOT_IMPLEMENTED,    /* vpx_codec_decode_fn_t     decode; */
+    NOT_IMPLEMENTED,    /* vpx_codec_frame_get_fn_t  frame_get; */
+  },
+  {
+    vp8e_usage_cfg_map, /* vpx_codec_enc_cfg_map_t    peek_si; */
+    vp8e_encode,        /* vpx_codec_encode_fn_t      encode; */
+    vp8e_get_cxdata,    /* vpx_codec_get_cx_data_fn_t   frame_get; */
+    vp8e_set_config,
+    NOT_IMPLEMENTED,
+    vp8e_get_preview,
+  } /* encoder functions */
+};
+
+
+#if CONFIG_EXPERIMENTAL
+
+CODEC_INTERFACE(vpx_codec_vp8x_cx) = {
+  "VP8 Experimental Encoder" VERSION_STRING,
+  VPX_CODEC_INTERNAL_ABI_VERSION,
+  VPX_CODEC_CAP_ENCODER | VPX_CODEC_CAP_PSNR,
+  /* vpx_codec_caps_t          caps; */
+  vp8e_exp_init,      /* vpx_codec_init_fn_t       init; */
+  vp8e_destroy,       /* vpx_codec_destroy_fn_t    destroy; */
+  vp8e_ctf_maps,      /* vpx_codec_ctrl_fn_map_t  *ctrl_maps; */
+  NOT_IMPLEMENTED,    /* vpx_codec_get_mmap_fn_t   get_mmap; */
+  NOT_IMPLEMENTED,    /* vpx_codec_set_mmap_fn_t   set_mmap; */
+  {
+    NOT_IMPLEMENTED,    /* vpx_codec_peek_si_fn_t    peek_si; */
+    NOT_IMPLEMENTED,    /* vpx_codec_get_si_fn_t     get_si; */
+    NOT_IMPLEMENTED,    /* vpx_codec_decode_fn_t     decode; */
+    NOT_IMPLEMENTED,    /* vpx_codec_frame_get_fn_t  frame_get; */
+  },
+  {
+    vp8e_usage_cfg_map, /* vpx_codec_enc_cfg_map_t    peek_si; */
+    vp8e_encode,        /* vpx_codec_encode_fn_t      encode; */
+    vp8e_get_cxdata,    /* vpx_codec_get_cx_data_fn_t   frame_get; */
+    vp8e_set_config,
+    NOT_IMPLEMENTED,
+    vp8e_get_preview,
+  } /* encoder functions */
+};
+#endif
+
+
+/*
+ * BEGIN BACKWARDS COMPATIBILITY SHIM.
+ */
+#define FORCE_KEY   2
+static vpx_codec_err_t api1_control(vpx_codec_alg_priv_t *ctx,
+                                    int                   ctrl_id,
+                                    va_list               args) {
+  vpx_codec_ctrl_fn_map_t *entry;
+
+  switch (ctrl_id) {
+    case VP8E_SET_FLUSHFLAG:
+      /* VP8 sample code did VP8E_SET_FLUSHFLAG followed by
+       * vpx_codec_get_cx_data() rather than vpx_codec_encode().
+       */
+      return vp8e_encode(ctx, NULL, 0, 0, 0, 0);
+    case VP8E_SET_FRAMETYPE:
+      ctx->base.enc.tbd |= FORCE_KEY;
+      return VPX_CODEC_OK;
+  }
+
+  for (entry = vp8e_ctf_maps; entry && entry->fn; entry++) {
+    if (!entry->ctrl_id || entry->ctrl_id == ctrl_id) {
+      return entry->fn(ctx, ctrl_id, args);
+    }
+  }
+
+  return VPX_CODEC_ERROR;
+}
+
+
+static vpx_codec_ctrl_fn_map_t api1_ctrl_maps[] = {
+  {0, api1_control},
+  { -1, NULL}
+};
+
+
+static vpx_codec_err_t api1_encode(vpx_codec_alg_priv_t  *ctx,
+                                   const vpx_image_t     *img,
+                                   vpx_codec_pts_t        pts,
+                                   unsigned long          duration,
+                                   vpx_enc_frame_flags_t  flags,
+                                   unsigned long          deadline) {
+  int force = ctx->base.enc.tbd;
+
+  ctx->base.enc.tbd = 0;
+  return vp8e_encode
+         (ctx,
+          img,
+          pts,
+          duration,
+          flags | ((force & FORCE_KEY) ? VPX_EFLAG_FORCE_KF : 0),
+          deadline);
+}
+
+
+vpx_codec_iface_t vpx_enc_vp8_algo = {
+  "WebM Project VP8 Encoder (Deprecated API)" VERSION_STRING,
+  VPX_CODEC_INTERNAL_ABI_VERSION,
+  VPX_CODEC_CAP_ENCODER,
+  /* vpx_codec_caps_t          caps; */
+  vp8e_init,          /* vpx_codec_init_fn_t       init; */
+  vp8e_destroy,       /* vpx_codec_destroy_fn_t    destroy; */
+  api1_ctrl_maps,     /* vpx_codec_ctrl_fn_map_t  *ctrl_maps; */
+  NOT_IMPLEMENTED,    /* vpx_codec_get_mmap_fn_t   get_mmap; */
+  NOT_IMPLEMENTED,    /* vpx_codec_set_mmap_fn_t   set_mmap; */
+  {NOT_IMPLEMENTED},  /* decoder functions */
+  {
+    vp8e_usage_cfg_map, /* vpx_codec_enc_cfg_map_t    peek_si; */
+    api1_encode,        /* vpx_codec_encode_fn_t      encode; */
+    vp8e_get_cxdata,    /* vpx_codec_get_cx_data_fn_t   frame_get; */
+    vp8e_set_config,
+    NOT_IMPLEMENTED,
+    vp8e_get_preview,
+  } /* encoder functions */
+};