libavcodec/libx264.c

   1 /*
   2  * H.264 encoding using the x264 library
   3  * Copyright (C) 2005  Mans Rullgard <mans@mansr.com>
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * Libav is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with Libav; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "libavutil/internal.h"
  23 #include "libavutil/opt.h"
  24 #include "libavutil/mem.h"
  25 #include "libavutil/pixdesc.h"
  26 #include "avcodec.h"
  27 #include "internal.h"
  28 #include <x264.h>
  29 #include <float.h>
  30 #include <math.h>
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34
  35 typedef struct X264Context {
  36     AVClass        *class;
  37     x264_param_t    params;
  38     x264_t         *enc;
  39     x264_picture_t  pic;
  40     uint8_t        *sei;
  41     int             sei_size;
  42     AVFrame         out_pic;
  43     char *preset;
  44     char *tune;
  45     char *profile;
  46     int fastfirstpass;
  47     float crf;
  48     float crf_max;
  49     int cqp;
  50     int aq_mode;
  51     float aq_strength;
  52     char *psy_rd;
  53     int psy;
  54     int rc_lookahead;
  55     int weightp;
  56     int weightb;
  57     int ssim;
  58     int intra_refresh;
  59     int b_bias;
  60     int b_pyramid;
  61     int mixed_refs;
  62     int dct8x8;
  63     int fast_pskip;
  64     int aud;
  65     int mbtree;
  66     char *deblock;
  67     float cplxblur;
  68     char *partitions;
  69     int direct_pred;
  70     int slice_max_size;
  71     char *stats;
  72     int nal_hrd;
  73     char *x264_params;
  74 } X264Context;
  75
  76 static void X264_log(void *p, int level, const char *fmt, va_list args)
  77 {
  78     static const int level_map[] = {
  79         [X264_LOG_ERROR]   = AV_LOG_ERROR,
  80         [X264_LOG_WARNING] = AV_LOG_WARNING,
  81         [X264_LOG_INFO]    = AV_LOG_INFO,
  82         [X264_LOG_DEBUG]   = AV_LOG_DEBUG
  83     };
  84
  85     if (level < 0 || level > X264_LOG_DEBUG)
  86         return;
  87
  88     av_vlog(p, level_map[level], fmt, args);
  89 }
  90
  91
  92 static int encode_nals(AVCodecContext *ctx, AVPacket *pkt,
  93                        x264_nal_t *nals, int nnal)
  94 {
  95     X264Context *x4 = ctx->priv_data;
  96     uint8_t *p;
  97     int i, size = x4->sei_size, ret;
  98
  99     if (!nnal)
 100         return 0;
 101
 102     for (i = 0; i < nnal; i++)
 103         size += nals[i].i_payload;
 104
 105     if ((ret = ff_alloc_packet(pkt, size)) < 0)
 106         return ret;
 107
 108     p = pkt->data;
 109
 110     /* Write the SEI as part of the first frame. */
 111     if (x4->sei_size > 0 && nnal > 0) {
 112         memcpy(p, x4->sei, x4->sei_size);
 113         p += x4->sei_size;
 114         x4->sei_size = 0;
 115     }
 116
 117     for (i = 0; i < nnal; i++){
 118         memcpy(p, nals[i].p_payload, nals[i].i_payload);
 119         p += nals[i].i_payload;
 120     }
 121
 122     return 1;
 123 }
 124
 125 static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
 126                       int *got_packet)
 127 {
 128     X264Context *x4 = ctx->priv_data;
 129     x264_nal_t *nal;
 130     int nnal, i, ret;
 131     x264_picture_t pic_out;
 132
 133     x264_picture_init( &x4->pic );
 134     x4->pic.img.i_csp   = x4->params.i_csp;
 135     if (x264_bit_depth > 8)
 136         x4->pic.img.i_csp |= X264_CSP_HIGH_DEPTH;
 137     x4->pic.img.i_plane = 3;
 138
 139     if (frame) {
 140         for (i = 0; i < 3; i++) {
 141             x4->pic.img.plane[i]    = frame->data[i];
 142             x4->pic.img.i_stride[i] = frame->linesize[i];
 143         }
 144
 145         x4->pic.i_pts  = frame->pts;
 146         x4->pic.i_type =
 147             frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME :
 148             frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P :
 149             frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B :
 150                                             X264_TYPE_AUTO;
 151         if (x4->params.b_tff != frame->top_field_first) {
 152             x4->params.b_tff = frame->top_field_first;
 153             x264_encoder_reconfig(x4->enc, &x4->params);
 154         }
 155         if (x4->params.vui.i_sar_height != ctx->sample_aspect_ratio.den ||
 156             x4->params.vui.i_sar_width  != ctx->sample_aspect_ratio.num) {
 157             x4->params.vui.i_sar_height = ctx->sample_aspect_ratio.den;
 158             x4->params.vui.i_sar_width  = ctx->sample_aspect_ratio.num;
 159             x264_encoder_reconfig(x4->enc, &x4->params);
 160         }
 161     }
 162
 163     do {
 164         if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
 165             return -1;
 166
 167         ret = encode_nals(ctx, pkt, nal, nnal);
 168         if (ret < 0)
 169             return -1;
 170     } while (!ret && !frame && x264_encoder_delayed_frames(x4->enc));
 171
 172     pkt->pts = pic_out.i_pts;
 173     pkt->dts = pic_out.i_dts;
 174
 175     switch (pic_out.i_type) {
 176     case X264_TYPE_IDR:
 177     case X264_TYPE_I:
 178         x4->out_pic.pict_type = AV_PICTURE_TYPE_I;
 179         break;
 180     case X264_TYPE_P:
 181         x4->out_pic.pict_type = AV_PICTURE_TYPE_P;
 182         break;
 183     case X264_TYPE_B:
 184     case X264_TYPE_BREF:
 185         x4->out_pic.pict_type = AV_PICTURE_TYPE_B;
 186         break;
 187     }
 188
 189     pkt->flags |= AV_PKT_FLAG_KEY*pic_out.b_keyframe;
 190     if (ret)
 191         x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
 192
 193     *got_packet = ret;
 194     return 0;
 195 }
 196
 197 static av_cold int X264_close(AVCodecContext *avctx)
 198 {
 199     X264Context *x4 = avctx->priv_data;
 200
 201     av_freep(&avctx->extradata);
 202     av_free(x4->sei);
 203
 204     if (x4->enc)
 205         x264_encoder_close(x4->enc);
 206
 207     return 0;
 208 }
 209
 210 static int convert_pix_fmt(enum AVPixelFormat pix_fmt)
 211 {
 212     switch (pix_fmt) {
 213     case AV_PIX_FMT_YUV420P:
 214     case AV_PIX_FMT_YUVJ420P:
 215     case AV_PIX_FMT_YUV420P9:
 216     case AV_PIX_FMT_YUV420P10: return X264_CSP_I420;
 217     case AV_PIX_FMT_YUV422P:
 218     case AV_PIX_FMT_YUV422P10: return X264_CSP_I422;
 219     case AV_PIX_FMT_YUV444P:
 220     case AV_PIX_FMT_YUV444P9:
 221     case AV_PIX_FMT_YUV444P10: return X264_CSP_I444;
 222     };
 223     return 0;
 224 }
 225
 226 #define PARSE_X264_OPT(name, var)\
 227     if (x4->var && x264_param_parse(&x4->params, name, x4->var) < 0) {\
 228         av_log(avctx, AV_LOG_ERROR, "Error parsing option '%s' with value '%s'.\n", name, x4->var);\
 229         return AVERROR(EINVAL);\
 230     }
 231
 232 static av_cold int X264_init(AVCodecContext *avctx)
 233 {
 234     X264Context *x4 = avctx->priv_data;
 235
 236     x264_param_default(&x4->params);
 237
 238     x4->params.b_deblocking_filter         = avctx->flags & CODEC_FLAG_LOOP_FILTER;
 239
 240     if (x4->preset || x4->tune)
 241         if (x264_param_default_preset(&x4->params, x4->preset, x4->tune) < 0) {
 242             av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", x4->preset, x4->tune);
 243             return AVERROR(EINVAL);
 244         }
 245
 246     if (avctx->level > 0)
 247         x4->params.i_level_idc = avctx->level;
 248
 249     x4->params.pf_log               = X264_log;
 250     x4->params.p_log_private        = avctx;
 251     x4->params.i_log_level          = X264_LOG_DEBUG;
 252     x4->params.i_csp                = convert_pix_fmt(avctx->pix_fmt);
 253
 254     if (avctx->bit_rate) {
 255         x4->params.rc.i_bitrate   = avctx->bit_rate / 1000;
 256         x4->params.rc.i_rc_method = X264_RC_ABR;
 257     }
 258     x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
 259     x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate    / 1000;
 260     x4->params.rc.b_stat_write      = avctx->flags & CODEC_FLAG_PASS1;
 261     if (avctx->flags & CODEC_FLAG_PASS2) {
 262         x4->params.rc.b_stat_read = 1;
 263     } else {
 264         if (x4->crf >= 0) {
 265             x4->params.rc.i_rc_method   = X264_RC_CRF;
 266             x4->params.rc.f_rf_constant = x4->crf;
 267         } else if (x4->cqp >= 0) {
 268             x4->params.rc.i_rc_method   = X264_RC_CQP;
 269             x4->params.rc.i_qp_constant = x4->cqp;
 270         }
 271
 272         if (x4->crf_max >= 0)
 273             x4->params.rc.f_rf_constant_max = x4->crf_max;
 274     }
 275
 276     if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy > 0 &&
 277         (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
 278         x4->params.rc.f_vbv_buffer_init =
 279             (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
 280     }
 281
 282     x4->params.rc.f_ip_factor             = 1 / fabs(avctx->i_quant_factor);
 283     x4->params.rc.f_pb_factor             = avctx->b_quant_factor;
 284     x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
 285
 286     if (avctx->me_method == ME_EPZS)
 287         x4->params.analyse.i_me_method = X264_ME_DIA;
 288     else if (avctx->me_method == ME_HEX)
 289         x4->params.analyse.i_me_method = X264_ME_HEX;
 290     else if (avctx->me_method == ME_UMH)
 291         x4->params.analyse.i_me_method = X264_ME_UMH;
 292     else if (avctx->me_method == ME_FULL)
 293         x4->params.analyse.i_me_method = X264_ME_ESA;
 294     else if (avctx->me_method == ME_TESA)
 295         x4->params.analyse.i_me_method = X264_ME_TESA;
 296
 297     if (avctx->gop_size >= 0)
 298         x4->params.i_keyint_max         = avctx->gop_size;
 299     if (avctx->max_b_frames >= 0)
 300         x4->params.i_bframe             = avctx->max_b_frames;
 301     if (avctx->scenechange_threshold >= 0)
 302         x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
 303     if (avctx->qmin >= 0)
 304         x4->params.rc.i_qp_min          = avctx->qmin;
 305     if (avctx->qmax >= 0)
 306         x4->params.rc.i_qp_max          = avctx->qmax;
 307     if (avctx->max_qdiff >= 0)
 308         x4->params.rc.i_qp_step         = avctx->max_qdiff;
 309     if (avctx->qblur >= 0)
 310         x4->params.rc.f_qblur           = avctx->qblur;     /* temporally blur quants */
 311     if (avctx->qcompress >= 0)
 312         x4->params.rc.f_qcompress       = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
 313     if (avctx->refs >= 0)
 314         x4->params.i_frame_reference    = avctx->refs;
 315     if (avctx->trellis >= 0)
 316         x4->params.analyse.i_trellis    = avctx->trellis;
 317     if (avctx->me_range >= 0)
 318         x4->params.analyse.i_me_range   = avctx->me_range;
 319     if (avctx->noise_reduction >= 0)
 320         x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
 321     if (avctx->me_subpel_quality >= 0)
 322         x4->params.analyse.i_subpel_refine   = avctx->me_subpel_quality;
 323     if (avctx->b_frame_strategy >= 0)
 324         x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
 325     if (avctx->keyint_min >= 0)
 326         x4->params.i_keyint_min = avctx->keyint_min;
 327     if (avctx->coder_type >= 0)
 328         x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
 329     if (avctx->me_cmp >= 0)
 330         x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
 331
 332     if (x4->aq_mode >= 0)
 333         x4->params.rc.i_aq_mode = x4->aq_mode;
 334     if (x4->aq_strength >= 0)
 335         x4->params.rc.f_aq_strength = x4->aq_strength;
 336     PARSE_X264_OPT("psy-rd", psy_rd);
 337     PARSE_X264_OPT("deblock", deblock);
 338     PARSE_X264_OPT("partitions", partitions);
 339     PARSE_X264_OPT("stats", stats);
 340     if (x4->psy >= 0)
 341         x4->params.analyse.b_psy  = x4->psy;
 342     if (x4->rc_lookahead >= 0)
 343         x4->params.rc.i_lookahead = x4->rc_lookahead;
 344     if (x4->weightp >= 0)
 345         x4->params.analyse.i_weighted_pred = x4->weightp;
 346     if (x4->weightb >= 0)
 347         x4->params.analyse.b_weighted_bipred = x4->weightb;
 348     if (x4->cplxblur >= 0)
 349         x4->params.rc.f_complexity_blur = x4->cplxblur;
 350
 351     if (x4->ssim >= 0)
 352         x4->params.analyse.b_ssim = x4->ssim;
 353     if (x4->intra_refresh >= 0)
 354         x4->params.b_intra_refresh = x4->intra_refresh;
 355     if (x4->b_bias != INT_MIN)
 356         x4->params.i_bframe_bias              = x4->b_bias;
 357     if (x4->b_pyramid >= 0)
 358         x4->params.i_bframe_pyramid = x4->b_pyramid;
 359     if (x4->mixed_refs >= 0)
 360         x4->params.analyse.b_mixed_references = x4->mixed_refs;
 361     if (x4->dct8x8 >= 0)
 362         x4->params.analyse.b_transform_8x8    = x4->dct8x8;
 363     if (x4->fast_pskip >= 0)
 364         x4->params.analyse.b_fast_pskip       = x4->fast_pskip;
 365     if (x4->aud >= 0)
 366         x4->params.b_aud                      = x4->aud;
 367     if (x4->mbtree >= 0)
 368         x4->params.rc.b_mb_tree               = x4->mbtree;
 369     if (x4->direct_pred >= 0)
 370         x4->params.analyse.i_direct_mv_pred   = x4->direct_pred;
 371
 372     if (x4->slice_max_size >= 0)
 373         x4->params.i_slice_max_size =  x4->slice_max_size;
 374
 375     if (x4->fastfirstpass)
 376         x264_param_apply_fastfirstpass(&x4->params);
 377
 378     if (x4->nal_hrd >= 0)
 379         x4->params.i_nal_hrd = x4->nal_hrd;
 380
 381     if (x4->profile)
 382         if (x264_param_apply_profile(&x4->params, x4->profile) < 0) {
 383             av_log(avctx, AV_LOG_ERROR, "Error setting profile %s.\n", x4->profile);
 384             return AVERROR(EINVAL);
 385         }
 386
 387     x4->params.i_width          = avctx->width;
 388     x4->params.i_height         = avctx->height;
 389     x4->params.vui.i_sar_width  = avctx->sample_aspect_ratio.num;
 390     x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
 391     x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den;
 392     x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num;
 393
 394     x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
 395
 396     x4->params.i_threads      = avctx->thread_count;
 397     if (avctx->thread_type)
 398         x4->params.b_sliced_threads = avctx->thread_type == FF_THREAD_SLICE;
 399
 400     x4->params.b_interlaced   = avctx->flags & CODEC_FLAG_INTERLACED_DCT;
 401
 402     x4->params.b_open_gop     = !(avctx->flags & CODEC_FLAG_CLOSED_GOP);
 403
 404     x4->params.i_slice_count  = avctx->slices;
 405
 406     x4->params.vui.b_fullrange = avctx->pix_fmt == AV_PIX_FMT_YUVJ420P;
 407
 408     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
 409         x4->params.b_repeat_headers = 0;
 410
 411     if (x4->x264_params) {
 412         AVDictionary *dict    = NULL;
 413         AVDictionaryEntry *en = NULL;
 414
 415         if (!av_dict_parse_string(&dict, x4->x264_params, "=", ":", 0)) {
 416             while ((en = av_dict_get(dict, "", en, AV_DICT_IGNORE_SUFFIX))) {
 417                 if (x264_param_parse(&x4->params, en->key, en->value) < 0)
 418                     av_log(avctx, AV_LOG_WARNING,
 419                            "Error parsing option '%s = %s'.\n",
 420                             en->key, en->value);
 421             }
 422
 423             av_dict_free(&dict);
 424         }
 425     }
 426
 427     // update AVCodecContext with x264 parameters
 428     avctx->has_b_frames = x4->params.i_bframe ?
 429         x4->params.i_bframe_pyramid ? 2 : 1 : 0;
 430     if (avctx->max_b_frames < 0)
 431         avctx->max_b_frames = 0;
 432
 433     avctx->bit_rate = x4->params.rc.i_bitrate*1000;
 434
 435     x4->enc = x264_encoder_open(&x4->params);
 436     if (!x4->enc)
 437         return -1;
 438
 439     avctx->coded_frame = &x4->out_pic;
 440
 441     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
 442         x264_nal_t *nal;
 443         uint8_t *p;
 444         int nnal, s, i;
 445
 446         s = x264_encoder_headers(x4->enc, &nal, &nnal);
 447         avctx->extradata = p = av_malloc(s);
 448
 449         for (i = 0; i < nnal; i++) {
 450             /* Don't put the SEI in extradata. */
 451             if (nal[i].i_type == NAL_SEI) {
 452                 av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25);
 453                 x4->sei_size = nal[i].i_payload;
 454                 x4->sei      = av_malloc(x4->sei_size);
 455                 memcpy(x4->sei, nal[i].p_payload, nal[i].i_payload);
 456                 continue;
 457             }
 458             memcpy(p, nal[i].p_payload, nal[i].i_payload);
 459             p += nal[i].i_payload;
 460         }
 461         avctx->extradata_size = p - avctx->extradata;
 462     }
 463
 464     return 0;
 465 }
 466
 467 static const enum AVPixelFormat pix_fmts_8bit[] = {
 468     AV_PIX_FMT_YUV420P,
 469     AV_PIX_FMT_YUVJ420P,
 470     AV_PIX_FMT_YUV422P,
 471     AV_PIX_FMT_YUV444P,
 472     AV_PIX_FMT_NONE
 473 };
 474 static const enum AVPixelFormat pix_fmts_9bit[] = {
 475     AV_PIX_FMT_YUV420P9,
 476     AV_PIX_FMT_YUV444P9,
 477     AV_PIX_FMT_NONE
 478 };
 479 static const enum AVPixelFormat pix_fmts_10bit[] = {
 480     AV_PIX_FMT_YUV420P10,
 481     AV_PIX_FMT_YUV422P10,
 482     AV_PIX_FMT_YUV444P10,
 483     AV_PIX_FMT_NONE
 484 };
 485
 486 static av_cold void X264_init_static(AVCodec *codec)
 487 {
 488     if (x264_bit_depth == 8)
 489         codec->pix_fmts = pix_fmts_8bit;
 490     else if (x264_bit_depth == 9)
 491         codec->pix_fmts = pix_fmts_9bit;
 492     else if (x264_bit_depth == 10)
 493         codec->pix_fmts = pix_fmts_10bit;
 494 }
 495
 496 #define OFFSET(x) offsetof(X264Context, x)
 497 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 498 static const AVOption options[] = {
 499     { "preset",        "Set the encoding preset (cf. x264 --fullhelp)",   OFFSET(preset),        AV_OPT_TYPE_STRING, { .str = "medium" }, 0, 0, VE},
 500     { "tune",          "Tune the encoding params (cf. x264 --fullhelp)",  OFFSET(tune),          AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
 501     { "profile",       "Set profile restrictions (cf. x264 --fullhelp) ", OFFSET(profile),       AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
 502     { "fastfirstpass", "Use fast settings when encoding first pass",      OFFSET(fastfirstpass), AV_OPT_TYPE_INT,    { .i64 = 1 }, 0, 1, VE},
 503     { "crf",           "Select the quality for constant quality mode",    OFFSET(crf),           AV_OPT_TYPE_FLOAT,  {.dbl = -1 }, -1, FLT_MAX, VE },
 504     { "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 },
 505     { "qp",            "Constant quantization parameter rate control method",OFFSET(cqp),        AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE },
 506     { "aq-mode",       "AQ method",                                       OFFSET(aq_mode),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "aq_mode"},
 507     { "none",          NULL,                              0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_NONE},         INT_MIN, INT_MAX, VE, "aq_mode" },
 508     { "variance",      "Variance AQ (complexity mask)",   0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_VARIANCE},     INT_MIN, INT_MAX, VE, "aq_mode" },
 509     { "autovariance",  "Auto-variance AQ (experimental)", 0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
 510     { "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},
 511     { "psy",           "Use psychovisual optimizations.",                 OFFSET(psy),           AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE },
 512     { "psy-rd",        "Strength of psychovisual optimization, in <psy-rd>:<psy-trellis> format.", OFFSET(psy_rd), AV_OPT_TYPE_STRING,  {0 }, 0, 0, VE},
 513     { "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 },
 514     { "weightb",       "Weighted prediction for B-frames.",               OFFSET(weightb),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE },
 515     { "weightp",       "Weighted prediction analysis method.",            OFFSET(weightp),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "weightp" },
 516     { "none",          NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_NONE},   INT_MIN, INT_MAX, VE, "weightp" },
 517     { "simple",        NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },
 518     { "smart",         NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_SMART},  INT_MIN, INT_MAX, VE, "weightp" },
 519     { "ssim",          "Calculate and print SSIM stats.",                 OFFSET(ssim),          AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE },
 520     { "intra-refresh", "Use Periodic Intra Refresh instead of IDR frames.",OFFSET(intra_refresh),AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE },
 521     { "b-bias",        "Influences how often B-frames are used",          OFFSET(b_bias),        AV_OPT_TYPE_INT,    { .i64 = INT_MIN}, INT_MIN, INT_MAX, VE },
 522     { "b-pyramid",     "Keep some B-frames as references.",               OFFSET(b_pyramid),     AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "b_pyramid" },
 523     { "none",          NULL,                                  0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_NONE},   INT_MIN, INT_MAX, VE, "b_pyramid" },
 524     { "strict",        "Strictly hierarchical pyramid",       0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_STRICT}, INT_MIN, INT_MAX, VE, "b_pyramid" },
 525     { "normal",        "Non-strict (not Blu-ray compatible)", 0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_NORMAL}, INT_MIN, INT_MAX, VE, "b_pyramid" },
 526     { "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 },
 527     { "8x8dct",        "High profile 8x8 transform.",                     OFFSET(dct8x8),        AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE},
 528     { "fast-pskip",    NULL,                                              OFFSET(fast_pskip),    AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE},
 529     { "aud",           "Use access unit delimiters.",                     OFFSET(aud),           AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE},
 530     { "mbtree",        "Use macroblock tree ratecontrol.",                OFFSET(mbtree),        AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE},
 531     { "deblock",       "Loop filter parameters, in <alpha:beta> form.",   OFFSET(deblock),       AV_OPT_TYPE_STRING, { 0 },  0, 0, VE},
 532     { "cplxblur",      "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), AV_OPT_TYPE_FLOAT,  {.dbl = -1 }, -1, FLT_MAX, VE},
 533     { "partitions",    "A comma-separated list of partitions to consider. "
 534                        "Possible values: p8x8, p4x4, b8x8, i8x8, i4x4, none, all", OFFSET(partitions), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
 535     { "direct-pred",   "Direct MV prediction mode",                       OFFSET(direct_pred),   AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "direct-pred" },
 536     { "none",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_NONE },     0, 0, VE, "direct-pred" },
 537     { "spatial",       NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_SPATIAL },  0, 0, VE, "direct-pred" },
 538     { "temporal",      NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },
 539     { "auto",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_AUTO },     0, 0, VE, "direct-pred" },
 540     { "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 },
 541     { "stats",         "Filename for 2 pass stats",                       OFFSET(stats),         AV_OPT_TYPE_STRING, { 0 },  0,       0, VE },
 542     { "nal-hrd",       "Signal HRD information (requires vbv-bufsize; "
 543                        "cbr not allowed in .mp4)",                        OFFSET(nal_hrd),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "nal-hrd" },
 544     { "none",          NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_NAL_HRD_NONE}, INT_MIN, INT_MAX, VE, "nal-hrd" },
 545     { "vbr",           NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_NAL_HRD_VBR},  INT_MIN, INT_MAX, VE, "nal-hrd" },
 546     { "cbr",           NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_NAL_HRD_CBR},  INT_MIN, INT_MAX, VE, "nal-hrd" },
 547     { "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 },
 548     { NULL },
 549 };
 550
 551 static const AVClass class = {
 552     .class_name = "libx264",
 553     .item_name  = av_default_item_name,
 554     .option     = options,
 555     .version    = LIBAVUTIL_VERSION_INT,
 556 };
 557
 558 static const AVCodecDefault x264_defaults[] = {
 559     { "b",                "0" },
 560     { "bf",               "-1" },
 561     { "g",                "-1" },
 562     { "qmin",             "-1" },
 563     { "qmax",             "-1" },
 564     { "qdiff",            "-1" },
 565     { "qblur",            "-1" },
 566     { "qcomp",            "-1" },
 567     { "refs",             "-1" },
 568     { "sc_threshold",     "-1" },
 569     { "trellis",          "-1" },
 570     { "nr",               "-1" },
 571     { "me_range",         "-1" },
 572     { "me_method",        "-1" },
 573     { "subq",             "-1" },
 574     { "b_strategy",       "-1" },
 575     { "keyint_min",       "-1" },
 576     { "coder",            "-1" },
 577     { "cmp",              "-1" },
 578     { "threads",          AV_STRINGIFY(X264_THREADS_AUTO) },
 579     { "thread_type",      "0" },
 580     { "flags",            "+cgop" },
 581     { "rc_init_occupancy","-1" },
 582     { NULL },
 583 };
 584
 585 AVCodec ff_libx264_encoder = {
 586     .name             = "libx264",
 587     .type             = AVMEDIA_TYPE_VIDEO,
 588     .id               = AV_CODEC_ID_H264,
 589     .priv_data_size   = sizeof(X264Context),
 590     .init             = X264_init,
 591     .encode2          = X264_frame,
 592     .close            = X264_close,
 593     .capabilities     = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,
 594     .long_name        = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
 595     .priv_class       = &class,
 596     .defaults         = x264_defaults,
 597     .init_static_data = X264_init_static,
 598 };