/*
  * 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/internal.h"

 #include "libavutil/opt.h"

 #include "libavutil/mem.h"

 #include "libavutil/pixdesc.h"

 #include "libavutil/stereo3d.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;

     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,
                        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)

         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_BGR24:
     case AV_PIX_FMT_RGB24:

         return 1;
 
     default:
         return 3;
     }
 }
 

 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};

     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;

         x4->pic.i_type =

             frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME :
             frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P :
             frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B :

                                             X264_TYPE_AUTO;

         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.den ||
             x4->params.vui.i_sar_width  != ctx->sample_aspect_ratio.num) {

             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);
         }

         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_LINES:
                 fpa_type = 1;
                 break;
             case AV_STEREO3D_COLUMNS:
                 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;
             default:
                 fpa_type = -1;
                 break;
             }
 
             if (fpa_type != x4->params.i_frame_packing) {
                 x4->params.i_frame_packing = fpa_type;
                 x264_encoder_reconfig(x4->enc, &x4->params);
             }
         }
     }

     do {

         if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
             return -1;

         ret = encode_nals(ctx, pkt, nal, nnal);
         if (ret < 0)

             return -1;

     } 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:

         ctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;

         break;
     case X264_TYPE_P:

         ctx->coded_frame->pict_type = AV_PICTURE_TYPE_P;

         break;
     case X264_TYPE_B:
     case X264_TYPE_BREF:

         ctx->coded_frame->pict_type = AV_PICTURE_TYPE_B;

         break;
     }
 

     pkt->flags |= AV_PKT_FLAG_KEY*pic_out.b_keyframe;
     if (ret)

         ctx->coded_frame->quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;

     *got_packet = ret;
     return 0;

 }
 

 static av_cold int X264_close(AVCodecContext *avctx)

 {
     X264Context *x4 = avctx->priv_data;
 

     av_freep(&avctx->extradata);

     av_free(x4->sei);

     if (x4->enc)

         x264_encoder_close(x4->enc);

     av_frame_free(&avctx->coded_frame);
 

     return 0;
 }
 

 #define OPT_STR(opt, param)                                                   \
     do {                                                                      \
         int ret;                                                              \

         if (param!=NULL && (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_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;

     };
     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;

     int sw,sh;

 
     x264_param_default(&x4->params);
 

     x4->params.b_deblocking_filter         = avctx->flags & CODEC_FLAG_LOOP_FILTER;

     x4->params.rc.f_pb_factor             = avctx->b_quant_factor;
     x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;

     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);

     OPT_STR("weightp", x4->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 & CODEC_FLAG_PASS1;
     if (avctx->flags & 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;

     }

     OPT_STR("level", x4->level);
 

     if (avctx->i_quant_factor > 0)
         x4->params.rc.f_ip_factor         = 1 / fabs(avctx->i_quant_factor);

     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;
 

     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 (avctx->scenechange_threshold >= 0)
         x4->params.i_scenecut_threshold = avctx->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;

     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 (avctx->noise_reduction >= 0)
         x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
     if (avctx->me_subpel_quality >= 0)
         x4->params.analyse.i_subpel_refine   = avctx->me_subpel_quality;
     if (avctx->b_frame_strategy >= 0)
         x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
     if (avctx->keyint_min >= 0)
         x4->params.i_keyint_min = avctx->keyint_min;
     if (avctx->coder_type >= 0)
         x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
     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->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;

     else {
         /*
          * Allow x264 to be instructed through AVCodecContext about the maximum
          * size of the RTP payload. For example, this enables the production of
          * payload suitable for the H.264 RTP packetization-mode 0 i.e. single
          * NAL unit per RTP packet.
          */
         if (avctx->rtp_payload_size)
             x4->params.i_slice_max_size = avctx->rtp_payload_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->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 & 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 & CODEC_FLAG_INTERLACED_DCT;

     x4->params.b_open_gop     = !(avctx->flags & 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 & 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 -1;
 

     avctx->coded_frame = av_frame_alloc();
     if (!avctx->coded_frame)
         return AVERROR(ENOMEM);

     if (avctx->flags & 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_malloc(s);

         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);
                 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;

     }
 

     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,

     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_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_INT,    { .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},
     {"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 (experimental)", 0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },

     { "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_INT,    { .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_INT,    { .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_INT,    { .i64 = -1 }, -1, 1, VE },
     { "intra-refresh", "Use Periodic Intra Refresh instead of IDR frames.",OFFSET(intra_refresh),AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE },

     { "bluray-compat", "Bluray compatibility workarounds.",               OFFSET(bluray_compat) ,AV_OPT_TYPE_INT,    { .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_INT, { .i64 = -1}, -1, 1, VE },
     { "8x8dct",        "High profile 8x8 transform.",                     OFFSET(dct8x8),        AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE},
     { "fast-pskip",    NULL,                                              OFFSET(fast_pskip),    AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE},
     { "aud",           "Use access unit delimiters.",                     OFFSET(aud),           AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE},
     { "mbtree",        "Use macroblock tree ratecontrol.",                OFFSET(mbtree),        AV_OPT_TYPE_INT,    { .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" },

     { "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 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,
 };
 

 static const AVCodecDefault x264_defaults[] = {
     { "b",                "0" },

     { "bf",               "-1" },

     { "flags2",           "0" },

     { "g",                "-1" },

     { "i_qfactor",        "-1" },

     { "qmin",             "-1" },
     { "qmax",             "-1" },
     { "qdiff",            "-1" },
     { "qblur",            "-1" },
     { "qcomp",            "-1" },

 //     { "rc_lookahead",     "-1" },

     { "refs",             "-1" },
     { "sc_threshold",     "-1" },

     { "trellis",          "-1" },
     { "nr",               "-1" },
     { "me_range",         "-1" },
     { "me_method",        "-1" },
     { "subq",             "-1" },
     { "b_strategy",       "-1" },
     { "keyint_min",       "-1" },
     { "coder",            "-1" },
     { "cmp",              "-1" },

     { "threads",          AV_STRINGIFY(X264_THREADS_AUTO) },

     { "thread_type",      "0" },

     { "flags",            "+cgop" },

     { "rc_init_occupancy","-1" },

     { NULL },
 };
 

 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     = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,

     .priv_class       = &x264_class,

     .defaults         = x264_defaults,

     .init_static_data = X264_init_static,

 };

 
 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   = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,

     .priv_class     = &rgbclass,
     .defaults       = x264_defaults,
     .pix_fmts       = pix_fmts_8bit_rgb,
 };