text: /*
   * H.264 encoding using the x264 library
   * Copyright (C) 2005  Mans Rullgard <mans@mansr.com>
   *
   * This file is part of FFmpeg.
   *
   * FFmpeg is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * FFmpeg is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with FFmpeg; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  
  #include "libavutil/eval.h"
  #include "libavutil/internal.h"
  #include "libavutil/opt.h"
  #include "libavutil/mem.h"
  #include "libavutil/pixdesc.h"
  #include "libavutil/stereo3d.h"
  #include "libavutil/intreadwrite.h"
  #include "avcodec.h"
  #include "internal.h"
  
  #if defined(_MSC_VER)
  #define X264_API_IMPORTS 1
  #endif
  
  #include <x264.h>
  #include <float.h>
  #include <math.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  typedef struct X264Context {
      AVClass        *class;
      x264_param_t    params;
      x264_t         *enc;
      x264_picture_t  pic;
      uint8_t        *sei;
      int             sei_size;
      char *preset;
      char *tune;
      char *profile;
      char *level;
      int fastfirstpass;
      char *wpredp;
      char *x264opts;
      float crf;
      float crf_max;
      int cqp;
      int aq_mode;
      float aq_strength;
      char *psy_rd;
      int psy;
      int rc_lookahead;
      int weightp;
      int weightb;
      int ssim;
      int intra_refresh;
      int bluray_compat;
      int b_bias;
      int b_pyramid;
      int mixed_refs;
      int dct8x8;
      int fast_pskip;
      int aud;
      int mbtree;
      char *deblock;
      float cplxblur;
      char *partitions;
      int direct_pred;
      int slice_max_size;
      char *stats;
      int nal_hrd;
      int avcintra_class;
      int motion_est;
      int forced_idr;
      int coder;
      int a53_cc;
      int b_frame_strategy;
      int chroma_offset;
      int scenechange_threshold;
      int noise_reduction;
  
      char *x264_params;
  } X264Context;
  
  static void X264_log(void *p, int level, const char *fmt, va_list args)
  {
      static const int level_map[] = {
          [X264_LOG_ERROR]   = AV_LOG_ERROR,
          [X264_LOG_WARNING] = AV_LOG_WARNING,
          [X264_LOG_INFO]    = AV_LOG_INFO,
          [X264_LOG_DEBUG]   = AV_LOG_DEBUG
      };
  
      if (level < 0 || level > X264_LOG_DEBUG)
          return;
  
      av_vlog(p, level_map[level], fmt, args);
  }
  
  
  static int encode_nals(AVCodecContext *ctx, AVPacket *pkt,
                         const x264_nal_t *nals, int nnal)
  {
      X264Context *x4 = ctx->priv_data;
      uint8_t *p;
      int i, size = x4->sei_size, ret;
  
      if (!nnal)
          return 0;
  
      for (i = 0; i < nnal; i++)
          size += nals[i].i_payload;
  
      if ((ret = ff_alloc_packet2(ctx, pkt, size, 0)) < 0)
          return ret;
  
      p = pkt->data;
  
      /* Write the SEI as part of the first frame. */
      if (x4->sei_size > 0 && nnal > 0) {
          if (x4->sei_size > size) {
              av_log(ctx, AV_LOG_ERROR, "Error: nal buffer is too small\n");
              return -1;
          }
          memcpy(p, x4->sei, x4->sei_size);
          p += x4->sei_size;
          x4->sei_size = 0;
          av_freep(&x4->sei);
      }
  
      for (i = 0; i < nnal; i++){
          memcpy(p, nals[i].p_payload, nals[i].i_payload);
          p += nals[i].i_payload;
      }
  
      return 1;
  }
  
  static int avfmt2_num_planes(int avfmt)
  {
      switch (avfmt) {
      case AV_PIX_FMT_YUV420P:
      case AV_PIX_FMT_YUVJ420P:
      case AV_PIX_FMT_YUV420P9:
      case AV_PIX_FMT_YUV420P10:
      case AV_PIX_FMT_YUV444P:
          return 3;
  
      case AV_PIX_FMT_BGR0:
      case AV_PIX_FMT_BGR24:
      case AV_PIX_FMT_RGB24:
          return 1;
  
      default:
          return 3;
      }
  }
  
  static void reconfig_encoder(AVCodecContext *ctx, const AVFrame *frame)
  {
      X264Context *x4 = ctx->priv_data;
      AVFrameSideData *side_data;
  
  
    if (x4->avcintra_class < 0) {
      if (x4->params.b_interlaced && x4->params.b_tff != frame->top_field_first) {
  
          x4->params.b_tff = frame->top_field_first;
          x264_encoder_reconfig(x4->enc, &x4->params);
      }
      if (x4->params.vui.i_sar_height*ctx->sample_aspect_ratio.num != ctx->sample_aspect_ratio.den * x4->params.vui.i_sar_width) {
          x4->params.vui.i_sar_height = ctx->sample_aspect_ratio.den;
          x4->params.vui.i_sar_width  = ctx->sample_aspect_ratio.num;
          x264_encoder_reconfig(x4->enc, &x4->params);
      }
  
      if (x4->params.rc.i_vbv_buffer_size != ctx->rc_buffer_size / 1000 ||
          x4->params.rc.i_vbv_max_bitrate != ctx->rc_max_rate    / 1000) {
          x4->params.rc.i_vbv_buffer_size = ctx->rc_buffer_size / 1000;
          x4->params.rc.i_vbv_max_bitrate = ctx->rc_max_rate    / 1000;
          x264_encoder_reconfig(x4->enc, &x4->params);
      }
  
      if (x4->params.rc.i_rc_method == X264_RC_ABR &&
          x4->params.rc.i_bitrate != ctx->bit_rate / 1000) {
          x4->params.rc.i_bitrate = ctx->bit_rate / 1000;
          x264_encoder_reconfig(x4->enc, &x4->params);
      }
  
      if (x4->crf >= 0 &&
          x4->params.rc.i_rc_method == X264_RC_CRF &&
          x4->params.rc.f_rf_constant != x4->crf) {
          x4->params.rc.f_rf_constant = x4->crf;
          x264_encoder_reconfig(x4->enc, &x4->params);
      }
  
      if (x4->params.rc.i_rc_method == X264_RC_CQP &&
          x4->cqp >= 0 &&
          x4->params.rc.i_qp_constant != x4->cqp) {
          x4->params.rc.i_qp_constant = x4->cqp;
          x264_encoder_reconfig(x4->enc, &x4->params);
      }
  
      if (x4->crf_max >= 0 &&
          x4->params.rc.f_rf_constant_max != x4->crf_max) {
          x4->params.rc.f_rf_constant_max = x4->crf_max;
          x264_encoder_reconfig(x4->enc, &x4->params);
      }
    }
  
      side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_STEREO3D);
      if (side_data) {
          AVStereo3D *stereo = (AVStereo3D *)side_data->data;
          int fpa_type;
  
          switch (stereo->type) {
          case AV_STEREO3D_CHECKERBOARD:
              fpa_type = 0;
              break;
          case AV_STEREO3D_COLUMNS:
              fpa_type = 1;
              break;
          case AV_STEREO3D_LINES:
              fpa_type = 2;
              break;
          case AV_STEREO3D_SIDEBYSIDE:
              fpa_type = 3;
              break;
          case AV_STEREO3D_TOPBOTTOM:
              fpa_type = 4;
              break;
          case AV_STEREO3D_FRAMESEQUENCE:
              fpa_type = 5;
              break;
  #if X264_BUILD >= 145
          case AV_STEREO3D_2D:
              fpa_type = 6;
              break;
  #endif
          default:
              fpa_type = -1;
              break;
          }
  
          /* Inverted mode is not supported by x264 */
          if (stereo->flags & AV_STEREO3D_FLAG_INVERT) {
              av_log(ctx, AV_LOG_WARNING,
                     "Ignoring unsupported inverted stereo value %d\n", fpa_type);
              fpa_type = -1;
          }
  
          if (fpa_type != x4->params.i_frame_packing) {
              x4->params.i_frame_packing = fpa_type;
              x264_encoder_reconfig(x4->enc, &x4->params);
          }
      }
  }
  
  static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
                        int *got_packet)
  {
      X264Context *x4 = ctx->priv_data;
      x264_nal_t *nal;
      int nnal, i, ret;
      x264_picture_t pic_out = {0};
      int pict_type;
      AVFrameSideData *side_data;
  
      x264_picture_init( &x4->pic );
      x4->pic.img.i_csp   = x4->params.i_csp;
      if (x264_bit_depth > 8)
          x4->pic.img.i_csp |= X264_CSP_HIGH_DEPTH;
      x4->pic.img.i_plane = avfmt2_num_planes(ctx->pix_fmt);
  
      if (frame) {
          for (i = 0; i < x4->pic.img.i_plane; i++) {
              x4->pic.img.plane[i]    = frame->data[i];
              x4->pic.img.i_stride[i] = frame->linesize[i];
          }
  
          x4->pic.i_pts  = frame->pts;
  
          switch (frame->pict_type) {
          case AV_PICTURE_TYPE_I:
              x4->pic.i_type = x4->forced_idr >= 0 ? X264_TYPE_IDR
                                                   : X264_TYPE_KEYFRAME;
              break;
          case AV_PICTURE_TYPE_P:
              x4->pic.i_type = X264_TYPE_P;
              break;
          case AV_PICTURE_TYPE_B:
              x4->pic.i_type = X264_TYPE_B;
              break;
          default:
              x4->pic.i_type = X264_TYPE_AUTO;
              break;
          }
          reconfig_encoder(ctx, frame);
  
          if (x4->a53_cc) {
              side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_A53_CC);
              if (side_data) {
                  x4->pic.extra_sei.payloads = av_mallocz(sizeof(x4->pic.extra_sei.payloads[0]));
                  if (x4->pic.extra_sei.payloads == NULL) {
                      av_log(ctx, AV_LOG_ERROR, "Not enough memory for closed captions, skipping\n");
                      goto skip_a53cc;
                  }
                  x4->pic.extra_sei.sei_free = av_free;
  
                  x4->pic.extra_sei.payloads[0].payload_size = side_data->size + 11;
                  x4->pic.extra_sei.payloads[0].payload = av_mallocz(x4->pic.extra_sei.payloads[0].payload_size);
                  if (x4->pic.extra_sei.payloads[0].payload == NULL) {
                      av_log(ctx, AV_LOG_ERROR, "Not enough memory for closed captions, skipping\n");
                      av_freep(&x4->pic.extra_sei.payloads);
                      goto skip_a53cc;
                  }
                  x4->pic.extra_sei.num_payloads = 1;
                  x4->pic.extra_sei.payloads[0].payload_type = 4;
                  memcpy(x4->pic.extra_sei.payloads[0].payload + 10, side_data->data, side_data->size);
                  x4->pic.extra_sei.payloads[0].payload[0] = 181;
                  x4->pic.extra_sei.payloads[0].payload[1] = 0;
                  x4->pic.extra_sei.payloads[0].payload[2] = 49;
  
                  /**
                   * 'GA94' is standard in North America for ATSC, but hard coding
                   * this style may not be the right thing to do -- other formats
                   * do exist. This information is not available in the side_data
                   * so we are going with this right now.
                   */
                  AV_WL32(x4->pic.extra_sei.payloads[0].payload + 3,
                      MKTAG('G', 'A', '9', '4'));
                  x4->pic.extra_sei.payloads[0].payload[7] = 3;
                  x4->pic.extra_sei.payloads[0].payload[8] =
                      ((side_data->size/3) & 0x1f) | 0x40;
                  x4->pic.extra_sei.payloads[0].payload[9] = 0;
                  x4->pic.extra_sei.payloads[0].payload[side_data->size+10] = 255;
              }
          }
      }
  skip_a53cc:
      do {
          if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
              return AVERROR_EXTERNAL;
  
          ret = encode_nals(ctx, pkt, nal, nnal);
          if (ret < 0)
              return ret;
      } while (!ret && !frame && x264_encoder_delayed_frames(x4->enc));
  
      pkt->pts = pic_out.i_pts;
      pkt->dts = pic_out.i_dts;
  
  
      switch (pic_out.i_type) {
      case X264_TYPE_IDR:
      case X264_TYPE_I:
          pict_type = AV_PICTURE_TYPE_I;
          break;
      case X264_TYPE_P:
          pict_type = AV_PICTURE_TYPE_P;
          break;
      case X264_TYPE_B:
      case X264_TYPE_BREF:
          pict_type = AV_PICTURE_TYPE_B;
          break;
      default:
          pict_type = AV_PICTURE_TYPE_NONE;
      }
  #if FF_API_CODED_FRAME
  FF_DISABLE_DEPRECATION_WARNINGS
      ctx->coded_frame->pict_type = pict_type;
  FF_ENABLE_DEPRECATION_WARNINGS
  #endif
  
      pkt->flags |= AV_PKT_FLAG_KEY*pic_out.b_keyframe;
      if (ret) {
          ff_side_data_set_encoder_stats(pkt, (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA, NULL, 0, pict_type);
  
  #if FF_API_CODED_FRAME
  FF_DISABLE_DEPRECATION_WARNINGS
          ctx->coded_frame->quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
  FF_ENABLE_DEPRECATION_WARNINGS
  #endif
      }
  
      *got_packet = ret;
      return 0;
  }
  
  static av_cold int X264_close(AVCodecContext *avctx)
  {
      X264Context *x4 = avctx->priv_data;
  
      av_freep(&avctx->extradata);
      av_freep(&x4->sei);
  
      if (x4->enc) {
          x264_encoder_close(x4->enc);
          x4->enc = NULL;
      }
  
      return 0;
  }
  
  #define OPT_STR(opt, param)                                                   \
      do {                                                                      \
          int ret;                                                              \
          if ((ret = x264_param_parse(&x4->params, opt, param)) < 0) { \
              if(ret == X264_PARAM_BAD_NAME)                                    \
                  av_log(avctx, AV_LOG_ERROR,                                   \
                          "bad option '%s': '%s'\n", opt, param);               \
              else                                                              \
                  av_log(avctx, AV_LOG_ERROR,                                   \
                          "bad value for '%s': '%s'\n", opt, param);            \
              return -1;                                                        \
          }                                                                     \
      } while (0)
  
  static int convert_pix_fmt(enum AVPixelFormat pix_fmt)
  {
      switch (pix_fmt) {
      case AV_PIX_FMT_YUV420P:
      case AV_PIX_FMT_YUVJ420P:
      case AV_PIX_FMT_YUV420P9:
      case AV_PIX_FMT_YUV420P10: return X264_CSP_I420;
      case AV_PIX_FMT_YUV422P:
      case AV_PIX_FMT_YUVJ422P:
      case AV_PIX_FMT_YUV422P10: return X264_CSP_I422;
      case AV_PIX_FMT_YUV444P:
      case AV_PIX_FMT_YUVJ444P:
      case AV_PIX_FMT_YUV444P9:
      case AV_PIX_FMT_YUV444P10: return X264_CSP_I444;
  #ifdef X264_CSP_BGR
      case AV_PIX_FMT_BGR0:
          return X264_CSP_BGRA;
      case AV_PIX_FMT_BGR24:
          return X264_CSP_BGR;
  
      case AV_PIX_FMT_RGB24:
          return X264_CSP_RGB;
  #endif
      case AV_PIX_FMT_NV12:      return X264_CSP_NV12;
      case AV_PIX_FMT_NV16:
      case AV_PIX_FMT_NV20:      return X264_CSP_NV16;
  #ifdef X264_CSP_NV21
      case AV_PIX_FMT_NV21:      return X264_CSP_NV21;
  #endif
      };
      return 0;
  }
  
  #define PARSE_X264_OPT(name, var)\
      if (x4->var && x264_param_parse(&x4->params, name, x4->var) < 0) {\
          av_log(avctx, AV_LOG_ERROR, "Error parsing option '%s' with value '%s'.\n", name, x4->var);\
          return AVERROR(EINVAL);\
      }
  
  static av_cold int X264_init(AVCodecContext *avctx)
  {
      X264Context *x4 = avctx->priv_data;
      AVCPBProperties *cpb_props;
      int sw,sh;
  
      if (avctx->global_quality > 0)
          av_log(avctx, AV_LOG_WARNING, "-qscale is ignored, -crf is recommended.\n");
  
  #if CONFIG_LIBX262_ENCODER
      if (avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
          x4->params.b_mpeg2 = 1;
          x264_param_default_mpeg2(&x4->params);
      } else
  #endif
      x264_param_default(&x4->params);
  
      x4->params.b_deblocking_filter         = avctx->flags & AV_CODEC_FLAG_LOOP_FILTER;
  
      if (x4->preset || x4->tune)
          if (x264_param_default_preset(&x4->params, x4->preset, x4->tune) < 0) {
              int i;
              av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", x4->preset, x4->tune);
              av_log(avctx, AV_LOG_INFO, "Possible presets:");
              for (i = 0; x264_preset_names[i]; i++)
                  av_log(avctx, AV_LOG_INFO, " %s", x264_preset_names[i]);
              av_log(avctx, AV_LOG_INFO, "\n");
              av_log(avctx, AV_LOG_INFO, "Possible tunes:");
              for (i = 0; x264_tune_names[i]; i++)
                  av_log(avctx, AV_LOG_INFO, " %s", x264_tune_names[i]);
              av_log(avctx, AV_LOG_INFO, "\n");
              return AVERROR(EINVAL);
          }
  
      if (avctx->level > 0)
          x4->params.i_level_idc = avctx->level;
  
      x4->params.pf_log               = X264_log;
      x4->params.p_log_private        = avctx;
      x4->params.i_log_level          = X264_LOG_DEBUG;
      x4->params.i_csp                = convert_pix_fmt(avctx->pix_fmt);
  
      PARSE_X264_OPT("weightp", wpredp);
  
      if (avctx->bit_rate) {
          x4->params.rc.i_bitrate   = avctx->bit_rate / 1000;
          x4->params.rc.i_rc_method = X264_RC_ABR;
      }
      x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
      x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate    / 1000;
      x4->params.rc.b_stat_write      = avctx->flags & AV_CODEC_FLAG_PASS1;
      if (avctx->flags & AV_CODEC_FLAG_PASS2) {
          x4->params.rc.b_stat_read = 1;
      } else {
          if (x4->crf >= 0) {
              x4->params.rc.i_rc_method   = X264_RC_CRF;
              x4->params.rc.f_rf_constant = x4->crf;
          } else if (x4->cqp >= 0) {
              x4->params.rc.i_rc_method   = X264_RC_CQP;
              x4->params.rc.i_qp_constant = x4->cqp;
          }
  
          if (x4->crf_max >= 0)
              x4->params.rc.f_rf_constant_max = x4->crf_max;
      }
  
      if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy > 0 &&
          (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
          x4->params.rc.f_vbv_buffer_init =
              (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
      }
  
      PARSE_X264_OPT("level", level);
  
      if (avctx->i_quant_factor > 0)
          x4->params.rc.f_ip_factor         = 1 / fabs(avctx->i_quant_factor);
      if (avctx->b_quant_factor > 0)
          x4->params.rc.f_pb_factor         = avctx->b_quant_factor;
  
  #if FF_API_PRIVATE_OPT
  FF_DISABLE_DEPRECATION_WARNINGS
      if (avctx->chromaoffset >= 0)
          x4->chroma_offset = avctx->chromaoffset;
  FF_ENABLE_DEPRECATION_WARNINGS
  #endif
      if (x4->chroma_offset >= 0)
          x4->params.analyse.i_chroma_qp_offset = x4->chroma_offset;
  
      if (avctx->gop_size >= 0)
          x4->params.i_keyint_max         = avctx->gop_size;
      if (avctx->max_b_frames >= 0)
          x4->params.i_bframe             = avctx->max_b_frames;
  
  #if FF_API_PRIVATE_OPT
  FF_DISABLE_DEPRECATION_WARNINGS
      if (avctx->scenechange_threshold >= 0)
          x4->scenechange_threshold = avctx->scenechange_threshold;
  FF_ENABLE_DEPRECATION_WARNINGS
  #endif
      if (x4->scenechange_threshold >= 0)
          x4->params.i_scenecut_threshold = x4->scenechange_threshold;
  
      if (avctx->qmin >= 0)
          x4->params.rc.i_qp_min          = avctx->qmin;
      if (avctx->qmax >= 0)
          x4->params.rc.i_qp_max          = avctx->qmax;
      if (avctx->max_qdiff >= 0)
          x4->params.rc.i_qp_step         = avctx->max_qdiff;
      if (avctx->qblur >= 0)
          x4->params.rc.f_qblur           = avctx->qblur;     /* temporally blur quants */
      if (avctx->qcompress >= 0)
          x4->params.rc.f_qcompress       = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
      if (avctx->refs >= 0)
          x4->params.i_frame_reference    = avctx->refs;
      else if (x4->level) {
          int i;
          int mbn = AV_CEIL_RSHIFT(avctx->width, 4) * AV_CEIL_RSHIFT(avctx->height, 4);
          int level_id = -1;
          char *tail;
          int scale = X264_BUILD < 129 ? 384 : 1;
  
          if (!strcmp(x4->level, "1b")) {
              level_id = 9;
          } else if (strlen(x4->level) <= 3){
              level_id = av_strtod(x4->level, &tail) * 10 + 0.5;
              if (*tail)
                  level_id = -1;
          }
          if (level_id <= 0)
              av_log(avctx, AV_LOG_WARNING, "Failed to parse level\n");
  
          for (i = 0; i<x264_levels[i].level_idc; i++)
              if (x264_levels[i].level_idc == level_id)
                  x4->params.i_frame_reference = av_clip(x264_levels[i].dpb / mbn / scale, 1, x4->params.i_frame_reference);
      }
  
      if (avctx->trellis >= 0)
          x4->params.analyse.i_trellis    = avctx->trellis;
      if (avctx->me_range >= 0)
          x4->params.analyse.i_me_range   = avctx->me_range;
  #if FF_API_PRIVATE_OPT
      FF_DISABLE_DEPRECATION_WARNINGS
      if (avctx->noise_reduction >= 0)
          x4->noise_reduction = avctx->noise_reduction;
      FF_ENABLE_DEPRECATION_WARNINGS
  #endif
      if (x4->noise_reduction >= 0)
          x4->params.analyse.i_noise_reduction = x4->noise_reduction;
      if (avctx->me_subpel_quality >= 0)
          x4->params.analyse.i_subpel_refine   = avctx->me_subpel_quality;
  #if FF_API_PRIVATE_OPT
  FF_DISABLE_DEPRECATION_WARNINGS
      if (avctx->b_frame_strategy >= 0)
          x4->b_frame_strategy = avctx->b_frame_strategy;
  FF_ENABLE_DEPRECATION_WARNINGS
  #endif
      if (avctx->keyint_min >= 0)
          x4->params.i_keyint_min = avctx->keyint_min;
  #if FF_API_CODER_TYPE
  FF_DISABLE_DEPRECATION_WARNINGS
      if (avctx->coder_type >= 0)
          x4->coder = avctx->coder_type == FF_CODER_TYPE_AC;
  FF_ENABLE_DEPRECATION_WARNINGS
  #endif
      if (avctx->me_cmp >= 0)
          x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
  
      if (x4->aq_mode >= 0)
          x4->params.rc.i_aq_mode = x4->aq_mode;
      if (x4->aq_strength >= 0)
          x4->params.rc.f_aq_strength = x4->aq_strength;
      PARSE_X264_OPT("psy-rd", psy_rd);
      PARSE_X264_OPT("deblock", deblock);
      PARSE_X264_OPT("partitions", partitions);
      PARSE_X264_OPT("stats", stats);
      if (x4->psy >= 0)
          x4->params.analyse.b_psy  = x4->psy;
      if (x4->rc_lookahead >= 0)
          x4->params.rc.i_lookahead = x4->rc_lookahead;
      if (x4->weightp >= 0)
          x4->params.analyse.i_weighted_pred = x4->weightp;
      if (x4->weightb >= 0)
          x4->params.analyse.b_weighted_bipred = x4->weightb;
      if (x4->cplxblur >= 0)
          x4->params.rc.f_complexity_blur = x4->cplxblur;
  
      if (x4->ssim >= 0)
          x4->params.analyse.b_ssim = x4->ssim;
      if (x4->intra_refresh >= 0)
          x4->params.b_intra_refresh = x4->intra_refresh;
      if (x4->bluray_compat >= 0) {
          x4->params.b_bluray_compat = x4->bluray_compat;
          x4->params.b_vfr_input = 0;
      }
      if (x4->avcintra_class >= 0)
  #if X264_BUILD >= 142
          x4->params.i_avcintra_class = x4->avcintra_class;
  #else
          av_log(avctx, AV_LOG_ERROR,
                 "x264 too old for AVC Intra, at least version 142 needed\n");
  #endif
      if (x4->b_bias != INT_MIN)
          x4->params.i_bframe_bias              = x4->b_bias;
      if (x4->b_pyramid >= 0)
          x4->params.i_bframe_pyramid = x4->b_pyramid;
      if (x4->mixed_refs >= 0)
          x4->params.analyse.b_mixed_references = x4->mixed_refs;
      if (x4->dct8x8 >= 0)
          x4->params.analyse.b_transform_8x8    = x4->dct8x8;
      if (x4->fast_pskip >= 0)
          x4->params.analyse.b_fast_pskip       = x4->fast_pskip;
      if (x4->aud >= 0)
          x4->params.b_aud                      = x4->aud;
      if (x4->mbtree >= 0)
          x4->params.rc.b_mb_tree               = x4->mbtree;
      if (x4->direct_pred >= 0)
          x4->params.analyse.i_direct_mv_pred   = x4->direct_pred;
  
      if (x4->slice_max_size >= 0)
          x4->params.i_slice_max_size =  x4->slice_max_size;
  
      if (x4->fastfirstpass)
          x264_param_apply_fastfirstpass(&x4->params);
  
      /* Allow specifying the x264 profile through AVCodecContext. */
      if (!x4->profile)
          switch (avctx->profile) {
          case FF_PROFILE_H264_BASELINE:
              x4->profile = av_strdup("baseline");
              break;
          case FF_PROFILE_H264_HIGH:
              x4->profile = av_strdup("high");
              break;
          case FF_PROFILE_H264_HIGH_10:
              x4->profile = av_strdup("high10");
              break;
          case FF_PROFILE_H264_HIGH_422:
              x4->profile = av_strdup("high422");
              break;
          case FF_PROFILE_H264_HIGH_444:
              x4->profile = av_strdup("high444");
              break;
          case FF_PROFILE_H264_MAIN:
              x4->profile = av_strdup("main");
              break;
          default:
              break;
          }
  
      if (x4->nal_hrd >= 0)
          x4->params.i_nal_hrd = x4->nal_hrd;
  
      if (x4->motion_est >= 0) {
          x4->params.analyse.i_me_method = x4->motion_est;
  #if FF_API_MOTION_EST
  FF_DISABLE_DEPRECATION_WARNINGS
      } else {
          if (avctx->me_method == ME_EPZS)
              x4->params.analyse.i_me_method = X264_ME_DIA;
          else if (avctx->me_method == ME_HEX)
              x4->params.analyse.i_me_method = X264_ME_HEX;
          else if (avctx->me_method == ME_UMH)
              x4->params.analyse.i_me_method = X264_ME_UMH;
          else if (avctx->me_method == ME_FULL)
              x4->params.analyse.i_me_method = X264_ME_ESA;
          else if (avctx->me_method == ME_TESA)
              x4->params.analyse.i_me_method = X264_ME_TESA;
  FF_ENABLE_DEPRECATION_WARNINGS
  #endif
      }
  
      if (x4->coder >= 0)
          x4->params.b_cabac = x4->coder;
  
      if (x4->b_frame_strategy >= 0)
          x4->params.i_bframe_adaptive = x4->b_frame_strategy;
  
      if (x4->profile)
          if (x264_param_apply_profile(&x4->params, x4->profile) < 0) {
              int i;
              av_log(avctx, AV_LOG_ERROR, "Error setting profile %s.\n", x4->profile);
              av_log(avctx, AV_LOG_INFO, "Possible profiles:");
              for (i = 0; x264_profile_names[i]; i++)
                  av_log(avctx, AV_LOG_INFO, " %s", x264_profile_names[i]);
              av_log(avctx, AV_LOG_INFO, "\n");
              return AVERROR(EINVAL);
          }
  
      x4->params.i_width          = avctx->width;
      x4->params.i_height         = avctx->height;
      av_reduce(&sw, &sh, avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 4096);
      x4->params.vui.i_sar_width  = sw;
      x4->params.vui.i_sar_height = sh;
      x4->params.i_timebase_den = avctx->time_base.den;
      x4->params.i_timebase_num = avctx->time_base.num;
      x4->params.i_fps_num = avctx->time_base.den;
      x4->params.i_fps_den = avctx->time_base.num * avctx->ticks_per_frame;
  
      x4->params.analyse.b_psnr = avctx->flags & AV_CODEC_FLAG_PSNR;
  
      x4->params.i_threads      = avctx->thread_count;
      if (avctx->thread_type)
          x4->params.b_sliced_threads = avctx->thread_type == FF_THREAD_SLICE;
  
      x4->params.b_interlaced   = avctx->flags & AV_CODEC_FLAG_INTERLACED_DCT;
  
      x4->params.b_open_gop     = !(avctx->flags & AV_CODEC_FLAG_CLOSED_GOP);
  
      x4->params.i_slice_count  = avctx->slices;
  
      x4->params.vui.b_fullrange = avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
                                   avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
                                   avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
                                   avctx->color_range == AVCOL_RANGE_JPEG;
  
      if (avctx->colorspace != AVCOL_SPC_UNSPECIFIED)
          x4->params.vui.i_colmatrix = avctx->colorspace;
      if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED)
          x4->params.vui.i_colorprim = avctx->color_primaries;
      if (avctx->color_trc != AVCOL_TRC_UNSPECIFIED)
          x4->params.vui.i_transfer  = avctx->color_trc;
  
      if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)
          x4->params.b_repeat_headers = 0;
  
      if(x4->x264opts){
          const char *p= x4->x264opts;
          while(p){
              char param[256]={0}, val[256]={0};
              if(sscanf(p, "%255[^:=]=%255[^:]", param, val) == 1){
                  OPT_STR(param, "1");
              }else
                  OPT_STR(param, val);
              p= strchr(p, ':');
              p+=!!p;
          }
      }
  
      if (x4->x264_params) {
          AVDictionary *dict    = NULL;
          AVDictionaryEntry *en = NULL;
  
          if (!av_dict_parse_string(&dict, x4->x264_params, "=", ":", 0)) {
              while ((en = av_dict_get(dict, "", en, AV_DICT_IGNORE_SUFFIX))) {
                  if (x264_param_parse(&x4->params, en->key, en->value) < 0)
                      av_log(avctx, AV_LOG_WARNING,
                             "Error parsing option '%s = %s'.\n",
                              en->key, en->value);
              }
  
              av_dict_free(&dict);
          }
      }
  
      // update AVCodecContext with x264 parameters
      avctx->has_b_frames = x4->params.i_bframe ?
          x4->params.i_bframe_pyramid ? 2 : 1 : 0;
      if (avctx->max_b_frames < 0)
          avctx->max_b_frames = 0;
  
      avctx->bit_rate = x4->params.rc.i_bitrate*1000;
  
      x4->enc = x264_encoder_open(&x4->params);
      if (!x4->enc)
          return AVERROR_EXTERNAL;
  
      if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
          x264_nal_t *nal;
          uint8_t *p;
          int nnal, s, i;
  
          s = x264_encoder_headers(x4->enc, &nal, &nnal);
          avctx->extradata = p = av_mallocz(s + AV_INPUT_BUFFER_PADDING_SIZE);
          if (!p)
              return AVERROR(ENOMEM);
  
          for (i = 0; i < nnal; i++) {
              /* Don't put the SEI in extradata. */
              if (nal[i].i_type == NAL_SEI) {
                  av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25);
                  x4->sei_size = nal[i].i_payload;
                  x4->sei      = av_malloc(x4->sei_size);
                  if (!x4->sei)
                      return AVERROR(ENOMEM);
                  memcpy(x4->sei, nal[i].p_payload, nal[i].i_payload);
                  continue;
              }
              memcpy(p, nal[i].p_payload, nal[i].i_payload);
              p += nal[i].i_payload;
          }
          avctx->extradata_size = p - avctx->extradata;
      }
  
      cpb_props = ff_add_cpb_side_data(avctx);
      if (!cpb_props)
          return AVERROR(ENOMEM);
      cpb_props->buffer_size = x4->params.rc.i_vbv_buffer_size * 1000;
      cpb_props->max_bitrate = x4->params.rc.i_vbv_max_bitrate * 1000;
      cpb_props->avg_bitrate = x4->params.rc.i_bitrate         * 1000;
  
      return 0;
  }
  
  static const enum AVPixelFormat pix_fmts_8bit[] = {
      AV_PIX_FMT_YUV420P,
      AV_PIX_FMT_YUVJ420P,
      AV_PIX_FMT_YUV422P,
      AV_PIX_FMT_YUVJ422P,
      AV_PIX_FMT_YUV444P,
      AV_PIX_FMT_YUVJ444P,
      AV_PIX_FMT_NV12,
      AV_PIX_FMT_NV16,
  #ifdef X264_CSP_NV21
      AV_PIX_FMT_NV21,
  #endif
      AV_PIX_FMT_NONE
  };
  static const enum AVPixelFormat pix_fmts_9bit[] = {
      AV_PIX_FMT_YUV420P9,
      AV_PIX_FMT_YUV444P9,
      AV_PIX_FMT_NONE
  };
  static const enum AVPixelFormat pix_fmts_10bit[] = {
      AV_PIX_FMT_YUV420P10,
      AV_PIX_FMT_YUV422P10,
      AV_PIX_FMT_YUV444P10,
      AV_PIX_FMT_NV20,
      AV_PIX_FMT_NONE
  };
  static const enum AVPixelFormat pix_fmts_8bit_rgb[] = {
  #ifdef X264_CSP_BGR
      AV_PIX_FMT_BGR0,
      AV_PIX_FMT_BGR24,
      AV_PIX_FMT_RGB24,
  #endif
      AV_PIX_FMT_NONE
  };
  
  static av_cold void X264_init_static(AVCodec *codec)
  {
      if (x264_bit_depth == 8)
          codec->pix_fmts = pix_fmts_8bit;
      else if (x264_bit_depth == 9)
          codec->pix_fmts = pix_fmts_9bit;
      else if (x264_bit_depth == 10)
          codec->pix_fmts = pix_fmts_10bit;
  }
  
  #define OFFSET(x) offsetof(X264Context, x)
  #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
  static const AVOption options[] = {
      { "preset",        "Set the encoding preset (cf. x264 --fullhelp)",   OFFSET(preset),        AV_OPT_TYPE_STRING, { .str = "medium" }, 0, 0, VE},
      { "tune",          "Tune the encoding params (cf. x264 --fullhelp)",  OFFSET(tune),          AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
      { "profile",       "Set profile restrictions (cf. x264 --fullhelp) ", OFFSET(profile),       AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
      { "fastfirstpass", "Use fast settings when encoding first pass",      OFFSET(fastfirstpass), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE},
      {"level", "Specify level (as defined by Annex A)", OFFSET(level), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
      {"passlogfile", "Filename for 2 pass stats", OFFSET(stats), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
      {"wpredp", "Weighted prediction for P-frames", OFFSET(wpredp), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
      {"a53cc",          "Use A53 Closed Captions (if available)",          OFFSET(a53_cc),        AV_OPT_TYPE_BOOL,   {.i64 = 0}, 0, 1, VE},
      {"x264opts", "x264 options", OFFSET(x264opts), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},
      { "crf",           "Select the quality for constant quality mode",    OFFSET(crf),           AV_OPT_TYPE_FLOAT,  {.dbl = -1 }, -1, FLT_MAX, VE },
      { "crf_max",       "In CRF mode, prevents VBV from lowering quality beyond this point.",OFFSET(crf_max), AV_OPT_TYPE_FLOAT, {.dbl = -1 }, -1, FLT_MAX, VE },
      { "qp",            "Constant quantization parameter rate control method",OFFSET(cqp),        AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE },
      { "aq-mode",       "AQ method",                                       OFFSET(aq_mode),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "aq_mode"},
      { "none",          NULL,                              0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_NONE},         INT_MIN, INT_MAX, VE, "aq_mode" },
      { "variance",      "Variance AQ (complexity mask)",   0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_VARIANCE},     INT_MIN, INT_MAX, VE, "aq_mode" },
      { "autovariance",  "Auto-variance AQ",                0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
  #if X264_BUILD >= 144
      { "autovariance-biased", "Auto-variance AQ with bias to dark scenes", 0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_AUTOVARIANCE_BIASED}, INT_MIN, INT_MAX, VE, "aq_mode" },
  #endif
      { "aq-strength",   "AQ strength. Reduces blocking and blurring in flat and textured areas.", OFFSET(aq_strength), AV_OPT_TYPE_FLOAT, {.dbl = -1}, -1, FLT_MAX, VE},
      { "psy",           "Use psychovisual optimizations.",                 OFFSET(psy),           AV_OPT_TYPE_BOOL,   { .i64 = -1 }, -1, 1, VE },
      { "psy-rd",        "Strength of psychovisual optimization, in <psy-rd>:<psy-trellis> format.", OFFSET(psy_rd), AV_OPT_TYPE_STRING,  {0 }, 0, 0, VE},
      { "rc-lookahead",  "Number of frames to look ahead for frametype and ratecontrol", OFFSET(rc_lookahead), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, VE },
      { "weightb",       "Weighted prediction for B-frames.",               OFFSET(weightb),       AV_OPT_TYPE_BOOL,   { .i64 = -1 }, -1, 1, VE },
      { "weightp",       "Weighted prediction analysis method.",            OFFSET(weightp),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "weightp" },
      { "none",          NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_NONE},   INT_MIN, INT_MAX, VE, "weightp" },
      { "simple",        NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },
      { "smart",         NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_SMART},  INT_MIN, INT_MAX, VE, "weightp" },
      { "ssim",          "Calculate and print SSIM stats.",                 OFFSET(ssim),          AV_OPT_TYPE_BOOL,   { .i64 = -1 }, -1, 1, VE },
      { "intra-refresh", "Use Periodic Intra Refresh instead of IDR frames.",OFFSET(intra_refresh),AV_OPT_TYPE_BOOL,   { .i64 = -1 }, -1, 1, VE },
      { "bluray-compat", "Bluray compatibility workarounds.",               OFFSET(bluray_compat) ,AV_OPT_TYPE_BOOL,   { .i64 = -1 }, -1, 1, VE },
      { "b-bias",        "Influences how often B-frames are used",          OFFSET(b_bias),        AV_OPT_TYPE_INT,    { .i64 = INT_MIN}, INT_MIN, INT_MAX, VE },
      { "b-pyramid",     "Keep some B-frames as references.",               OFFSET(b_pyramid),     AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "b_pyramid" },
      { "none",          NULL,                                  0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_NONE},   INT_MIN, INT_MAX, VE, "b_pyramid" },
      { "strict",        "Strictly hierarchical pyramid",       0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_STRICT}, INT_MIN, INT_MAX, VE, "b_pyramid" },
      { "normal",        "Non-strict (not Blu-ray compatible)", 0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_NORMAL}, INT_MIN, INT_MAX, VE, "b_pyramid" },
      { "mixed-refs",    "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), AV_OPT_TYPE_BOOL, { .i64 = -1}, -1, 1, VE },
      { "8x8dct",        "High profile 8x8 transform.",                     OFFSET(dct8x8),        AV_OPT_TYPE_BOOL,   { .i64 = -1 }, -1, 1, VE},
      { "fast-pskip",    NULL,                                              OFFSET(fast_pskip),    AV_OPT_TYPE_BOOL,   { .i64 = -1 }, -1, 1, VE},
      { "aud",           "Use access unit delimiters.",                     OFFSET(aud),           AV_OPT_TYPE_BOOL,   { .i64 = -1 }, -1, 1, VE},
      { "mbtree",        "Use macroblock tree ratecontrol.",                OFFSET(mbtree),        AV_OPT_TYPE_BOOL,   { .i64 = -1 }, -1, 1, VE},
      { "deblock",       "Loop filter parameters, in <alpha:beta> form.",   OFFSET(deblock),       AV_OPT_TYPE_STRING, { 0 },  0, 0, VE},
      { "cplxblur",      "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), AV_OPT_TYPE_FLOAT,  {.dbl = -1 }, -1, FLT_MAX, VE},
      { "partitions",    "A comma-separated list of partitions to consider. "
                         "Possible values: p8x8, p4x4, b8x8, i8x8, i4x4, none, all", OFFSET(partitions), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
      { "direct-pred",   "Direct MV prediction mode",                       OFFSET(direct_pred),   AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "direct-pred" },
      { "none",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_NONE },     0, 0, VE, "direct-pred" },
      { "spatial",       NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_SPATIAL },  0, 0, VE, "direct-pred" },
      { "temporal",      NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },
      { "auto",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_AUTO },     0, 0, VE, "direct-pred" },
      { "slice-max-size","Limit the size of each slice in bytes",           OFFSET(slice_max_size),AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE },
      { "stats",         "Filename for 2 pass stats",                       OFFSET(stats),         AV_OPT_TYPE_STRING, { 0 },  0,       0, VE },
      { "nal-hrd",       "Signal HRD information (requires vbv-bufsize; "
                         "cbr not allowed in .mp4)",                        OFFSET(nal_hrd),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "nal-hrd" },
      { "none",          NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_NAL_HRD_NONE}, INT_MIN, INT_MAX, VE, "nal-hrd" },
      { "vbr",           NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_NAL_HRD_VBR},  INT_MIN, INT_MAX, VE, "nal-hrd" },
      { "cbr",           NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_NAL_HRD_CBR},  INT_MIN, INT_MAX, VE, "nal-hrd" },
      { "avcintra-class","AVC-Intra class 50/100/200",                      OFFSET(avcintra_class),AV_OPT_TYPE_INT,     { .i64 = -1 }, -1, 200   , VE},
      { "motion-est",   "Set motion estimation method",                     OFFSET(motion_est),    AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, X264_ME_TESA, VE, "motion-est"},
      { "dia",           NULL, 0, AV_OPT_TYPE_CONST, { .i64 = X264_ME_DIA },  INT_MIN, INT_MAX, VE, "motion-est" },
      { "hex",           NULL, 0, AV_OPT_TYPE_CONST, { .i64 = X264_ME_HEX },  INT_MIN, INT_MAX, VE, "motion-est" },
      { "umh",           NULL, 0, AV_OPT_TYPE_CONST, { .i64 = X264_ME_UMH },  INT_MIN, INT_MAX, VE, "motion-est" },
      { "esa",           NULL, 0, AV_OPT_TYPE_CONST, { .i64 = X264_ME_ESA },  INT_MIN, INT_MAX, VE, "motion-est" },
      { "tesa",          NULL, 0, AV_OPT_TYPE_CONST, { .i64 = X264_ME_TESA }, INT_MIN, INT_MAX, VE, "motion-est" },
      { "forced-idr",   "If forcing keyframes, force them as IDR frames.",                                  OFFSET(forced_idr),  AV_OPT_TYPE_BOOL,   { .i64 = -1 }, -1, 1, VE },
      { "coder",    "Coder type",                                           OFFSET(coder), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "coder" },
      { "default",          NULL, 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, INT_MIN, INT_MAX, VE, "coder" },
      { "cavlc",            NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 },  INT_MIN, INT_MAX, VE, "coder" },
      { "cabac",            NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 },  INT_MIN, INT_MAX, VE, "coder" },
      { "vlc",              NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 },  INT_MIN, INT_MAX, VE, "coder" },
      { "ac",               NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 },  INT_MIN, INT_MAX, VE, "coder" },
      { "b_strategy",   "Strategy to choose between I/P/B-frames",          OFFSET(b_frame_strategy), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 2, VE },
      { "chromaoffset", "QP difference between chroma and luma",            OFFSET(chroma_offset), AV_OPT_TYPE_INT, { .i64 = -1 }, INT_MIN, INT_MAX, VE },
      { "sc_threshold", "Scene change threshold",                           OFFSET(scenechange_threshold), AV_OPT_TYPE_INT, { .i64 = -1 }, INT_MIN, INT_MAX, VE },
      { "noise_reduction", "Noise reduction",                               OFFSET(noise_reduction), AV_OPT_TYPE_INT, { .i64 = -1 }, INT_MIN, INT_MAX, VE },
  
      { "x264-params",  "Override the x264 configuration using a :-separated list of key=value parameters", OFFSET(x264_params), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE },
      { NULL },
  };
  
  static const AVCodecDefault x264_defaults[] = {
      { "b",                "0" },
      { "bf",               "-1" },
      { "flags2",           "0" },
      { "g",                "-1" },
      { "i_qfactor",        "-1" },
      { "b_qfactor",        "-1" },
      { "qmin",             "-1" },
      { "qmax",             "-1" },
      { "qdiff",            "-1" },
      { "qblur",            "-1" },
      { "qcomp",            "-1" },
  //     { "rc_lookahead",     "-1" },
      { "refs",             "-1" },
  #if FF_API_PRIVATE_OPT
      { "sc_threshold",     "-1" },
  #endif
      { "trellis",          "-1" },
  #if FF_API_PRIVATE_OPT
      { "nr",               "-1" },
  #endif
      { "me_range",         "-1" },
  #if FF_API_MOTION_EST
      { "me_method",        "-1" },
  #endif
      { "subq",             "-1" },
  #if FF_API_PRIVATE_OPT
      { "b_strategy",       "-1" },
  #endif
      { "keyint_min",       "-1" },
  #if FF_API_CODER_TYPE
      { "coder",            "-1" },
  #endif
      { "cmp",              "-1" },
      { "threads",          AV_STRINGIFY(X264_THREADS_AUTO) },
      { "thread_type",      "0" },
      { "flags",            "+cgop" },
      { "rc_init_occupancy","-1" },
      { NULL },
  };
  
  #if CONFIG_LIBX264_ENCODER
  static const AVClass x264_class = {
      .class_name = "libx264",
      .item_name  = av_default_item_name,
      .option     = options,
      .version    = LIBAVUTIL_VERSION_INT,
  };
  
  static const AVClass rgbclass = {
      .class_name = "libx264rgb",
      .item_name  = av_default_item_name,
      .option     = options,
      .version    = LIBAVUTIL_VERSION_INT,
  };
  
  AVCodec ff_libx264_encoder = {
      .name             = "libx264",
      .long_name        = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
      .type             = AVMEDIA_TYPE_VIDEO,
      .id               = AV_CODEC_ID_H264,
      .priv_data_size   = sizeof(X264Context),
      .init             = X264_init,
      .encode2          = X264_frame,
      .close            = X264_close,
      .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
      .priv_class       = &x264_class,
      .defaults         = x264_defaults,
      .init_static_data = X264_init_static,
      .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE |
                          FF_CODEC_CAP_INIT_CLEANUP,
  };
  
  AVCodec ff_libx264rgb_encoder = {
      .name           = "libx264rgb",
      .long_name      = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 RGB"),
      .type           = AVMEDIA_TYPE_VIDEO,
      .id             = AV_CODEC_ID_H264,
      .priv_data_size = sizeof(X264Context),
      .init           = X264_init,
      .encode2        = X264_frame,
      .close          = X264_close,
      .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
      .priv_class     = &rgbclass,
      .defaults       = x264_defaults,
      .pix_fmts       = pix_fmts_8bit_rgb,
  };
  #endif
  
  #if CONFIG_LIBX262_ENCODER
  static const AVClass X262_class = {
      .class_name = "libx262",
      .item_name  = av_default_item_name,
      .option     = options,
      .version    = LIBAVUTIL_VERSION_INT,
  };
  
  AVCodec ff_libx262_encoder = {
      .name             = "libx262",
      .long_name        = NULL_IF_CONFIG_SMALL("libx262 MPEG2VIDEO"),
      .type             = AVMEDIA_TYPE_VIDEO,
      .id               = AV_CODEC_ID_MPEG2VIDEO,
      .priv_data_size   = sizeof(X264Context),
      .init             = X264_init,
      .encode2          = X264_frame,
      .close            = X264_close,
      .capabilities     = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
      .priv_class       = &X262_class,
      .defaults         = x264_defaults,
      .pix_fmts         = pix_fmts_8bit,
      .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE |
                          FF_CODEC_CAP_INIT_CLEANUP,
  };
  #endif
  