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FFmpeg/libavcodec/libx264.c

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  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 FFmpeg.

  6.  *

  7.  * FFmpeg 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.  * FFmpeg 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 FFmpeg; 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/opt.h"

  23. #include "avcodec.h"

  24. #include "internal.h"

  25. #include <x264.h>

  26. #include <float.h>

  27. #include <math.h>

  28. #include <stdio.h>

  29. #include <stdlib.h>

  30. #include <string.h>

  31. 

  32. typedef struct X264Context {

  33.     AVClass        *class;

  34.     x264_param_t    params;

  35.     x264_t         *enc;

  36.     x264_picture_t  pic;

  37.     uint8_t        *sei;

  38.     int             sei_size;

  39.     AVFrame         out_pic;

  40.     char *preset;

  41.     char *tune;

  42.     char *profile;

  43.     char *level;

  44.     int fastfirstpass;

  45.     char *stats;

  46.     char *wpredp;

  47.     char *x264opts;

  48.     float crf;

  49.     float crf_max;

  50.     int cqp;

  51.     int aq_mode;

  52.     float aq_strength;

  53.     float psy_rd;

  54.     float psy_trellis;

  55.     int rc_lookahead;

  56.     int weightp;

  57. } X264Context;

  58. 

  59. static void X264_log(void *p, int level, const char *fmt, va_list args)

  60. {

  61.     static const int level_map[] = {

  62.         [X264_LOG_ERROR]   = AV_LOG_ERROR,

  63.         [X264_LOG_WARNING] = AV_LOG_WARNING,

  64.         [X264_LOG_INFO]    = AV_LOG_INFO,

  65.         [X264_LOG_DEBUG]   = AV_LOG_DEBUG

  66.     };

  67. 

  68.     if (level < 0 || level > X264_LOG_DEBUG)

  69.         return;

  70. 

  71.     av_vlog(p, level_map[level], fmt, args);

  72. }

  73. 

  74. 

  75. static int encode_nals(AVCodecContext *ctx, uint8_t *buf, int size,

  76.                        x264_nal_t *nals, int nnal, int skip_sei)

  77. {

  78.     X264Context *x4 = ctx->priv_data;

  79.     uint8_t *p = buf;

  80.     int i;

  81. 

  82.     /* Write the SEI as part of the first frame. */

  83.     if (x4->sei_size > 0 && nnal > 0) {

  84.         memcpy(p, x4->sei, x4->sei_size);

  85.         p += x4->sei_size;

  86.         x4->sei_size = 0;

  87.     }

  88. 

  89.     for (i = 0; i < nnal; i++){

  90.         /* Don't put the SEI in extradata. */

  91.         if (skip_sei && nals[i].i_type == NAL_SEI) {

  92.             x4->sei_size = nals[i].i_payload;

  93.             x4->sei      = av_malloc(x4->sei_size);

  94.             memcpy(x4->sei, nals[i].p_payload, nals[i].i_payload);

  95.             continue;

  96.         }

  97.         memcpy(p, nals[i].p_payload, nals[i].i_payload);

  98.         p += nals[i].i_payload;

  99.     }

  100. 

  101.     return p - buf;

  102. }

  103. 

  104. static int X264_frame(AVCodecContext *ctx, uint8_t *buf,

  105.                       int bufsize, void *data)

  106. {

  107.     X264Context *x4 = ctx->priv_data;

  108.     AVFrame *frame = data;

  109.     x264_nal_t *nal;

  110.     int nnal, i;

  111.     x264_picture_t pic_out;

  112. 

  113.     x264_picture_init( &x4->pic );

  114.     x4->pic.img.i_csp   = X264_CSP_I420;

  115.     x4->pic.img.i_plane = 3;

  116. 

  117.     if (frame) {

  118.         for (i = 0; i < 3; i++) {

  119.             x4->pic.img.plane[i]    = frame->data[i];

  120.             x4->pic.img.i_stride[i] = frame->linesize[i];

  121.         }

  122. 

  123.         x4->pic.i_pts  = frame->pts;

  124.         x4->pic.i_type =

  125.             frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME :

  126.             frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P :

  127.             frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B :

  128.                                             X264_TYPE_AUTO;

  129.         if (x4->params.b_tff != frame->top_field_first) {

  130.             x4->params.b_tff = frame->top_field_first;

  131.             x264_encoder_reconfig(x4->enc, &x4->params);

  132.         }

  133.         if (x4->params.vui.i_sar_height != ctx->sample_aspect_ratio.den

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

  135.             x4->params.vui.i_sar_height = ctx->sample_aspect_ratio.den;

  136.             x4->params.vui.i_sar_width = ctx->sample_aspect_ratio.num;

  137.             x264_encoder_reconfig(x4->enc, &x4->params);

  138.         }

  139.     }

  140. 

  141.     do {

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

  143.         return -1;

  144. 

  145.     bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0);

  146.     if (bufsize < 0)

  147.         return -1;

  148.     } while (!bufsize && !frame && x264_encoder_delayed_frames(x4->enc));

  149. 

  150.     /* FIXME: libx264 now provides DTS, but AVFrame doesn't have a field for it. */

  151.     x4->out_pic.pts = pic_out.i_pts;

  152. 

  153.     switch (pic_out.i_type) {

  154.     case X264_TYPE_IDR:

  155.     case X264_TYPE_I:

  156.         x4->out_pic.pict_type = AV_PICTURE_TYPE_I;

  157.         break;

  158.     case X264_TYPE_P:

  159.         x4->out_pic.pict_type = AV_PICTURE_TYPE_P;

  160.         break;

  161.     case X264_TYPE_B:

  162.     case X264_TYPE_BREF:

  163.         x4->out_pic.pict_type = AV_PICTURE_TYPE_B;

  164.         break;

  165.     }

  166. 

  167.     x4->out_pic.key_frame = pic_out.b_keyframe;

  168.     if (bufsize)

  169.         x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;

  170. 

  171.     return bufsize;

  172. }

  173. 

  174. static av_cold int X264_close(AVCodecContext *avctx)

  175. {

  176.     X264Context *x4 = avctx->priv_data;

  177. 

  178.     av_freep(&avctx->extradata);

  179.     av_free(x4->sei);

  180. 

  181.     if (x4->enc)

  182.         x264_encoder_close(x4->enc);

  183. 

  184.     return 0;

  185. }

  186. 

  187. /**

  188.  * Detect default settings and use default profile to avoid libx264 failure.

  189.  */

  190. static void check_default_settings(AVCodecContext *avctx)

  191. {

  192.     X264Context *x4 = avctx->priv_data;

  193. 

  194.     int score = 0;

  195.     score += x4->params.analyse.i_me_range == 0;

  196.     score += x4->params.rc.i_qp_step == 3;

  197.     score += x4->params.i_keyint_max == 12;

  198.     score += x4->params.rc.i_qp_min == 2;

  199.     score += x4->params.rc.i_qp_max == 31;

  200.     score += x4->params.rc.f_qcompress == 0.5;

  201.     score += fabs(x4->params.rc.f_ip_factor - 1.25) < 0.01;

  202.     score += fabs(x4->params.rc.f_pb_factor - 1.25) < 0.01;

  203.     score += x4->params.analyse.inter == 0 && x4->params.analyse.i_subpel_refine == 8;

  204.     if (score >= 5) {

  205.         av_log(avctx, AV_LOG_ERROR, "Default settings detected, using medium profile\n");

  206.         x4->preset = av_strdup("medium");

  207.         if (avctx->bit_rate == 200*1000)

  208.             avctx->crf = 23;

  209.     }

  210. }

  211. 

  212. #define OPT_STR(opt, param)                                                   \

  213.     do {                                                                      \

  214.         int ret;                                                              \

  215.         if (param && (ret = x264_param_parse(&x4->params, opt, param)) < 0) { \

  216.             if(ret == X264_PARAM_BAD_NAME)                                    \

  217.                 av_log(avctx, AV_LOG_ERROR,                                   \

  218.                         "bad option '%s': '%s'\n", opt, param);               \

  219.             else                                                              \

  220.                 av_log(avctx, AV_LOG_ERROR,                                   \

  221.                         "bad value for '%s': '%s'\n", opt, param);            \

  222.             return -1;                                                        \

  223.         }                                                                     \

  224.     } while (0);

  225. 

  226. static av_cold int X264_init(AVCodecContext *avctx)

  227. {

  228.     X264Context *x4 = avctx->priv_data;

  229. 

  230.     x4->sei_size = 0;

  231.     x264_param_default(&x4->params);

  232. 

  233.     x4->params.i_keyint_max         = avctx->gop_size;

  234. 

  235.     x4->params.i_bframe          = avctx->max_b_frames;

  236.     x4->params.b_cabac           = avctx->coder_type == FF_CODER_TYPE_AC;

  237.     x4->params.i_bframe_adaptive = avctx->b_frame_strategy;

  238.     x4->params.i_bframe_bias     = avctx->bframebias;

  239.     x4->params.i_bframe_pyramid  = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE;

  240. 

  241.     x4->params.i_keyint_min = avctx->keyint_min;

  242.     if (x4->params.i_keyint_min > x4->params.i_keyint_max)

  243.         x4->params.i_keyint_min = x4->params.i_keyint_max;

  244. 

  245.     x4->params.i_scenecut_threshold        = avctx->scenechange_threshold;

  246. 

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

  248.     x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;

  249.     x4->params.i_deblocking_filter_beta    = avctx->deblockbeta;

  250. 

  251.     x4->params.rc.i_qp_min                 = avctx->qmin;

  252.     x4->params.rc.i_qp_max                 = avctx->qmax;

  253.     x4->params.rc.i_qp_step                = avctx->max_qdiff;

  254. 

  255.     x4->params.rc.f_qcompress       = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */

  256.     x4->params.rc.f_qblur           = avctx->qblur;     /* temporally blur quants */

  257.     x4->params.rc.f_complexity_blur = avctx->complexityblur;

  258. 

  259.     x4->params.i_frame_reference    = avctx->refs;

  260. 

  261.     x4->params.analyse.inter    = 0;

  262.     if (avctx->partitions) {

  263.         if (avctx->partitions & X264_PART_I4X4)

  264.             x4->params.analyse.inter |= X264_ANALYSE_I4x4;

  265.         if (avctx->partitions & X264_PART_I8X8)

  266.             x4->params.analyse.inter |= X264_ANALYSE_I8x8;

  267.         if (avctx->partitions & X264_PART_P8X8)

  268.             x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16;

  269.         if (avctx->partitions & X264_PART_P4X4)

  270.             x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8;

  271.         if (avctx->partitions & X264_PART_B8X8)

  272.             x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16;

  273.     }

  274. 

  275.     x4->params.analyse.i_direct_mv_pred  = avctx->directpred;

  276. 

  277.     x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;

  278. 

  279.     if (avctx->me_method == ME_EPZS)

  280.         x4->params.analyse.i_me_method = X264_ME_DIA;

  281.     else if (avctx->me_method == ME_HEX)

  282.         x4->params.analyse.i_me_method = X264_ME_HEX;

  283.     else if (avctx->me_method == ME_UMH)

  284.         x4->params.analyse.i_me_method = X264_ME_UMH;

  285.     else if (avctx->me_method == ME_FULL)

  286.         x4->params.analyse.i_me_method = X264_ME_ESA;

  287.     else if (avctx->me_method == ME_TESA)

  288.         x4->params.analyse.i_me_method = X264_ME_TESA;

  289.     else x4->params.analyse.i_me_method = X264_ME_HEX;

  290. 

  291.     x4->params.analyse.b_psy              = avctx->flags2 & CODEC_FLAG2_PSY;

  292. 

  293.     x4->params.analyse.i_me_range         = avctx->me_range;

  294.     x4->params.analyse.i_subpel_refine    = avctx->me_subpel_quality;

  295. 

  296.     x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS;

  297.     x4->params.analyse.b_chroma_me        = avctx->me_cmp & FF_CMP_CHROMA;

  298.     x4->params.analyse.b_transform_8x8    = avctx->flags2 & CODEC_FLAG2_8X8DCT;

  299.     x4->params.analyse.b_fast_pskip       = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;

  300. 

  301.     x4->params.analyse.i_trellis          = avctx->trellis;

  302.     x4->params.analyse.i_noise_reduction  = avctx->noise_reduction;

  303. 

  304.     x4->params.rc.b_mb_tree               = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);

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

  306.     x4->params.rc.f_pb_factor             = avctx->b_quant_factor;

  307.     x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;

  308. 

  309.     if (!x4->preset)

  310.         check_default_settings(avctx);

  311. 

  312.     if (x4->preset || x4->tune) {

  313.         if (x264_param_default_preset(&x4->params, x4->preset, x4->tune) < 0) {

  314.             av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", x4->preset, x4->tune);

  315.             return AVERROR(EINVAL);

  316.         }

  317.     }

  318. 

  319.     x4->params.pf_log               = X264_log;

  320.     x4->params.p_log_private        = avctx;

  321.     x4->params.i_log_level          = X264_LOG_DEBUG;

  322. 

  323.     OPT_STR("weightp", x4->wpredp);

  324. 

  325.     x4->params.b_intra_refresh      = avctx->flags2 & CODEC_FLAG2_INTRA_REFRESH;

  326.     if (avctx->bit_rate) {

  327.         x4->params.rc.i_bitrate   = avctx->bit_rate / 1000;

  328.         x4->params.rc.i_rc_method = X264_RC_ABR;

  329.     }

  330.     x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;

  331.     x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate    / 1000;

  332.     x4->params.rc.b_stat_write      = avctx->flags & CODEC_FLAG_PASS1;

  333.     if (avctx->flags & CODEC_FLAG_PASS2) {

  334.         x4->params.rc.b_stat_read = 1;

  335.     } else {

  336. #if FF_API_X264_GLOBAL_OPTS

  337.         if (avctx->crf) {

  338.             x4->params.rc.i_rc_method   = X264_RC_CRF;

  339.             x4->params.rc.f_rf_constant = avctx->crf;

  340.             x4->params.rc.f_rf_constant_max = avctx->crf_max;

  341.         } else if (avctx->cqp > -1) {

  342.             x4->params.rc.i_rc_method   = X264_RC_CQP;

  343.             x4->params.rc.i_qp_constant = avctx->cqp;

  344.         }

  345. #endif

  346. 

  347.         if (x4->crf >= 0) {

  348.             x4->params.rc.i_rc_method   = X264_RC_CRF;

  349.             x4->params.rc.f_rf_constant = x4->crf;

  350.         } else if (x4->cqp >= 0) {

  351.             x4->params.rc.i_rc_method   = X264_RC_CQP;

  352.             x4->params.rc.i_qp_constant = x4->cqp;

  353.         }

  354. 

  355.         if (x4->crf_max >= 0)

  356.             x4->params.rc.f_rf_constant_max = x4->crf_max;

  357.     }

  358. 

  359.     OPT_STR("stats", x4->stats);

  360. 

  361.     if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy &&

  362.         (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {

  363.         x4->params.rc.f_vbv_buffer_init =

  364.             (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;

  365.     }

  366. 

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

  368. 

  369.     if(x4->x264opts){

  370.         const char *p= x4->x264opts;

  371.         while(p){

  372.             char param[256]={0}, val[256]={0};

  373.             sscanf(p, "%255[^:=]=%255[^:]", param, val);

  374.             OPT_STR(param, val);

  375.             p= strchr(p, ':');

  376.             p+=!!p;

  377.         }

  378.     }

  379. 

  380. #if FF_API_X264_GLOBAL_OPTS

  381.     if (avctx->aq_mode >= 0)

  382.         x4->params.rc.i_aq_mode = avctx->aq_mode;

  383.     if (avctx->aq_strength >= 0)

  384.         x4->params.rc.f_aq_strength = avctx->aq_strength;

  385.     if (avctx->psy_rd >= 0)

  386.         x4->params.analyse.f_psy_rd           = avctx->psy_rd;

  387.     if (avctx->psy_trellis >= 0)

  388.         x4->params.analyse.f_psy_trellis      = avctx->psy_trellis;

  389.     if (avctx->rc_lookahead >= 0)

  390.         x4->params.rc.i_lookahead             = avctx->rc_lookahead;

  391.     if (avctx->weighted_p_pred >= 0)

  392.         x4->params.analyse.i_weighted_pred    = avctx->weighted_p_pred;

  393. #endif

  394. 

  395.     if (x4->aq_mode >= 0)

  396.         x4->params.rc.i_aq_mode = x4->aq_mode;

  397.     if (x4->aq_strength >= 0)

  398.         x4->params.rc.f_aq_strength = x4->aq_strength;

  399.     if (x4->psy_rd >= 0)

  400.         x4->params.analyse.f_psy_rd = x4->psy_rd;

  401.     if (x4->psy_trellis >= 0)

  402.         x4->params.analyse.f_psy_trellis = x4->psy_trellis;

  403.     if (x4->rc_lookahead >= 0)

  404.         x4->params.rc.i_lookahead = x4->rc_lookahead;

  405.     if (x4->weightp >= 0)

  406.         x4->params.analyse.i_weighted_pred = x4->weightp;

  407. 

  408. 

  409. 

  410.     if (x4->fastfirstpass)

  411.         x264_param_apply_fastfirstpass(&x4->params);

  412. 

  413.     if (x4->profile)

  414.         if (x264_param_apply_profile(&x4->params, x4->profile) < 0) {

  415.             av_log(avctx, AV_LOG_ERROR, "Error setting profile %s.\n", x4->profile);

  416.             return AVERROR(EINVAL);

  417.         }

  418. 

  419.     x4->params.i_width          = avctx->width;

  420.     x4->params.i_height         = avctx->height;

  421.     x4->params.vui.i_sar_width  = avctx->sample_aspect_ratio.num;

  422.     x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;

  423.     x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den;

  424.     x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num;

  425. 

  426.     x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;

  427.     x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM;

  428. 

  429.     x4->params.b_aud          = avctx->flags2 & CODEC_FLAG2_AUD;

  430. 

  431.     x4->params.i_threads      = avctx->thread_count;

  432. 

  433.     x4->params.b_interlaced   = avctx->flags & CODEC_FLAG_INTERLACED_DCT;

  434. 

  435. //    x4->params.b_open_gop     = !(avctx->flags & CODEC_FLAG_CLOSED_GOP);

  436. 

  437.     x4->params.i_slice_count  = avctx->slices;

  438. 

  439.     x4->params.vui.b_fullrange = avctx->pix_fmt == PIX_FMT_YUVJ420P;

  440. 

  441.     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)

  442.         x4->params.b_repeat_headers = 0;

  443. 

  444.     // update AVCodecContext with x264 parameters

  445.     avctx->has_b_frames = x4->params.i_bframe ?

  446.         x4->params.i_bframe_pyramid ? 2 : 1 : 0;

  447.     avctx->bit_rate = x4->params.rc.i_bitrate*1000;

  448. #if FF_API_X264_GLOBAL_OPTS

  449.     avctx->crf = x4->params.rc.f_rf_constant;

  450. #endif

  451. 

  452.     x4->enc = x264_encoder_open(&x4->params);

  453.     if (!x4->enc)

  454.         return -1;

  455. 

  456.     avctx->coded_frame = &x4->out_pic;

  457. 

  458.     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {

  459.         x264_nal_t *nal;

  460.         int nnal, s, i;

  461. 

  462.         s = x264_encoder_headers(x4->enc, &nal, &nnal);

  463. 

  464.         for (i = 0; i < nnal; i++)

  465.             if (nal[i].i_type == NAL_SEI)

  466.                 av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25);

  467. 

  468.         avctx->extradata      = av_malloc(s);

  469.         avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1);

  470.     }

  471. 

  472.     return 0;

  473. }

  474. 

  475. #define OFFSET(x) offsetof(X264Context,x)

  476. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  477. 

  478. static const AVOption options[] = {

  479.     { "preset",        "Set the encoding preset (cf. x264 --fullhelp)",   OFFSET(preset),        FF_OPT_TYPE_STRING, { .str = "medium" }, 0, 0, VE},

  480.     { "tune",          "Tune the encoding params (cf. x264 --fullhelp)",  OFFSET(tune),          FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},

  481.     { "profile",       "Set profile restrictions (cf. x264 --fullhelp) ", OFFSET(profile),       FF_OPT_TYPE_STRING, { 0 }, 0, 0, VE},

  482.     { "fastfirstpass", "Use fast settings when encoding first pass",      OFFSET(fastfirstpass), FF_OPT_TYPE_INT,    { 1 }, 0, 1, VE},

  483.     {"level", "Specify level (as defined by Annex A)", OFFSET(level), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},

  484.     {"passlogfile", "Filename for 2 pass stats", OFFSET(stats), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},

  485.     {"wpredp", "Weighted prediction for P-frames", OFFSET(wpredp), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},

  486.     {"x264opts", "x264 options", OFFSET(x264opts), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE},

  487.     { "crf",           "Select the quality for constant quality mode",    OFFSET(crf),           FF_OPT_TYPE_FLOAT,  {-1 }, -1, FLT_MAX, VE },

  488.     { "crf_max",       "In CRF mode, prevents VBV from lowering quality beyond this point.",OFFSET(crf_max), FF_OPT_TYPE_FLOAT, {-1 }, -1, FLT_MAX, VE },

  489.     { "cqp",           "Constant quantization parameter rate control method",OFFSET(cqp),        FF_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE },

  490.     { "aq_mode",       "AQ method",                                       OFFSET(aq_mode),       FF_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE, "aq_mode"},

  491.     { "none",          NULL,                              0, FF_OPT_TYPE_CONST, {X264_AQ_NONE},         INT_MIN, INT_MAX, VE, "aq_mode" },

  492.     { "variance",      "Variance AQ (complexity mask)",   0, FF_OPT_TYPE_CONST, {X264_AQ_VARIANCE},     INT_MIN, INT_MAX, VE, "aq_mode" },

  493.     { "autovariance",  "Auto-variance AQ (experimental)", 0, FF_OPT_TYPE_CONST, {X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },

  494.     { "aq_strength",   "AQ strength. Reduces blocking and blurring in flat and textured areas.", OFFSET(aq_strength), FF_OPT_TYPE_FLOAT, {-1}, -1, FLT_MAX, VE},

  495.     { "pdy_rd",        "Psy RD strength.",                                OFFSET(psy_rd),        FF_OPT_TYPE_FLOAT,  {-1 }, -1, FLT_MAX, VE},

  496.     { "psy_trellis",   "Psy trellis strength",                            OFFSET(psy_trellis),   FF_OPT_TYPE_FLOAT,  {-1 }, -1, FLT_MAX, VE},

  497.     { "rc_lookahead",  "Number of frames to look ahead for frametype and ratecontrol", OFFSET(rc_lookahead), FF_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },

  498.     { "weightp",       "Weighted prediction analysis method.",            OFFSET(weightp),       FF_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE, "weightp" },

  499.     { "none",          NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_NONE},   INT_MIN, INT_MAX, VE, "weightp" },

  500.     { "simple",        NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },

  501.     { "smart",         NULL, 0, FF_OPT_TYPE_CONST, {X264_WEIGHTP_SMART},  INT_MIN, INT_MAX, VE, "weightp" },

  502.     { NULL },

  503. };

  504. 

  505. static const AVClass class = {

  506.     .class_name = "libx264",

  507.     .item_name  = av_default_item_name,

  508.     .option     = options,

  509.     .version    = LIBAVUTIL_VERSION_INT,

  510. };

  511. 

  512. static const AVCodecDefault x264_defaults[] = {

  513.     { "b",                "0" },

  514.     { NULL },

  515. };

  516. 

  517. AVCodec ff_libx264_encoder = {

  518.     .name           = "libx264",

  519.     .type           = AVMEDIA_TYPE_VIDEO,

  520.     .id             = CODEC_ID_H264,

  521.     .priv_data_size = sizeof(X264Context),

  522.     .init           = X264_init,

  523.     .encode         = X264_frame,

  524.     .close          = X264_close,

  525.     .capabilities   = CODEC_CAP_DELAY,

  526.     .pix_fmts       = (const enum PixelFormat[]) { PIX_FMT_YUV420P, PIX_FMT_YUVJ420P, PIX_FMT_NONE },

  527.     .long_name      = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),

  528.     .priv_class     = &class,

  529.     .defaults       = x264_defaults,

  530. };