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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 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. 

  29. #if defined(_MSC_VER)

  30. #define X264_API_IMPORTS 1

  31. #endif

  32. 

  33. #include <x264.h>

  34. #include <float.h>

  35. #include <math.h>

  36. #include <stdio.h>

  37. #include <stdlib.h>

  38. #include <string.h>

  39. 

  40. typedef struct X264Context {

  41.     AVClass        *class;

  42.     x264_param_t    params;

  43.     x264_t         *enc;

  44.     x264_picture_t  pic;

  45.     uint8_t        *sei;

  46.     int             sei_size;

  47.     AVFrame         out_pic;

  48.     char *preset;

  49.     char *tune;

  50.     char *profile;

  51.     int fastfirstpass;

  52.     float crf;

  53.     float crf_max;

  54.     int cqp;

  55.     int aq_mode;

  56.     float aq_strength;

  57.     char *psy_rd;

  58.     int psy;

  59.     int rc_lookahead;

  60.     int weightp;

  61.     int weightb;

  62.     int ssim;

  63.     int intra_refresh;

  64.     int bluray_compat;

  65.     int b_bias;

  66.     int b_pyramid;

  67.     int mixed_refs;

  68.     int dct8x8;

  69.     int fast_pskip;

  70.     int aud;

  71.     int mbtree;

  72.     char *deblock;

  73.     float cplxblur;

  74.     char *partitions;

  75.     int direct_pred;

  76.     int slice_max_size;

  77.     char *stats;

  78.     int nal_hrd;

  79.     char *x264_params;

  80. } X264Context;

  81. 

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

  83. {

  84.     static const int level_map[] = {

  85.         [X264_LOG_ERROR]   = AV_LOG_ERROR,

  86.         [X264_LOG_WARNING] = AV_LOG_WARNING,

  87.         [X264_LOG_INFO]    = AV_LOG_INFO,

  88.         [X264_LOG_DEBUG]   = AV_LOG_DEBUG

  89.     };

  90. 

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

  92.         return;

  93. 

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

  95. }

  96. 

  97. 

  98. static int encode_nals(AVCodecContext *ctx, AVPacket *pkt,

  99.                        x264_nal_t *nals, int nnal)

  100. {

  101.     X264Context *x4 = ctx->priv_data;

  102.     uint8_t *p;

  103.     int i, size = x4->sei_size, ret;

  104. 

  105.     if (!nnal)

  106.         return 0;

  107. 

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

  109.         size += nals[i].i_payload;

  110. 

  111.     if ((ret = ff_alloc_packet(pkt, size)) < 0)

  112.         return ret;

  113. 

  114.     p = pkt->data;

  115. 

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

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

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

  119.         p += x4->sei_size;

  120.         x4->sei_size = 0;

  121.     }

  122. 

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

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

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

  126.     }

  127. 

  128.     return 1;

  129. }

  130. 

  131. static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,

  132.                       int *got_packet)

  133. {

  134.     X264Context *x4 = ctx->priv_data;

  135.     x264_nal_t *nal;

  136.     int nnal, i, ret;

  137.     x264_picture_t pic_out;

  138. 

  139.     x264_picture_init( &x4->pic );

  140.     x4->pic.img.i_csp   = x4->params.i_csp;

  141.     if (x264_bit_depth > 8)

  142.         x4->pic.img.i_csp |= X264_CSP_HIGH_DEPTH;

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

  144. 

  145.     if (frame) {

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

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

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

  149.         }

  150. 

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

  152.         x4->pic.i_type =

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

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

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

  156.                                             X264_TYPE_AUTO;

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

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

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

  160.         }

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

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

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

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

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

  166.         }

  167.     }

  168. 

  169.     do {

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

  171.             return -1;

  172. 

  173.         ret = encode_nals(ctx, pkt, nal, nnal);

  174.         if (ret < 0)

  175.             return -1;

  176.     } while (!ret && !frame && x264_encoder_delayed_frames(x4->enc));

  177. 

  178.     pkt->pts = pic_out.i_pts;

  179.     pkt->dts = pic_out.i_dts;

  180. 

  181.     switch (pic_out.i_type) {

  182.     case X264_TYPE_IDR:

  183.     case X264_TYPE_I:

  184.         x4->out_pic.pict_type = AV_PICTURE_TYPE_I;

  185.         break;

  186.     case X264_TYPE_P:

  187.         x4->out_pic.pict_type = AV_PICTURE_TYPE_P;

  188.         break;

  189.     case X264_TYPE_B:

  190.     case X264_TYPE_BREF:

  191.         x4->out_pic.pict_type = AV_PICTURE_TYPE_B;

  192.         break;

  193.     }

  194. 

  195.     pkt->flags |= AV_PKT_FLAG_KEY*pic_out.b_keyframe;

  196.     if (ret)

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

  198. 

  199.     *got_packet = ret;

  200.     return 0;

  201. }

  202. 

  203. static av_cold int X264_close(AVCodecContext *avctx)

  204. {

  205.     X264Context *x4 = avctx->priv_data;

  206. 

  207.     av_freep(&avctx->extradata);

  208.     av_free(x4->sei);

  209. 

  210.     if (x4->enc)

  211.         x264_encoder_close(x4->enc);

  212. 

  213.     return 0;

  214. }

  215. 

  216. static int convert_pix_fmt(enum AVPixelFormat pix_fmt)

  217. {

  218.     switch (pix_fmt) {

  219.     case AV_PIX_FMT_YUV420P:

  220.     case AV_PIX_FMT_YUVJ420P:

  221.     case AV_PIX_FMT_YUV420P9:

  222.     case AV_PIX_FMT_YUV420P10: return X264_CSP_I420;

  223.     case AV_PIX_FMT_YUV422P:

  224.     case AV_PIX_FMT_YUV422P10: return X264_CSP_I422;

  225.     case AV_PIX_FMT_YUV444P:

  226.     case AV_PIX_FMT_YUV444P9:

  227.     case AV_PIX_FMT_YUV444P10: return X264_CSP_I444;

  228.     case AV_PIX_FMT_NV12:      return X264_CSP_NV12;

  229.     case AV_PIX_FMT_NV16:

  230.     case AV_PIX_FMT_NV20:      return X264_CSP_NV16;

  231.     };

  232.     return 0;

  233. }

  234. 

  235. #define PARSE_X264_OPT(name, var)\

  236.     if (x4->var && x264_param_parse(&x4->params, name, x4->var) < 0) {\

  237.         av_log(avctx, AV_LOG_ERROR, "Error parsing option '%s' with value '%s'.\n", name, x4->var);\

  238.         return AVERROR(EINVAL);\

  239.     }

  240. 

  241. static av_cold int X264_init(AVCodecContext *avctx)

  242. {

  243.     X264Context *x4 = avctx->priv_data;

  244. 

  245.     x264_param_default(&x4->params);

  246. 

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

  248. 

  249.     if (x4->preset || x4->tune)

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

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

  252.             return AVERROR(EINVAL);

  253.         }

  254. 

  255.     if (avctx->level > 0)

  256.         x4->params.i_level_idc = avctx->level;

  257. 

  258.     x4->params.pf_log               = X264_log;

  259.     x4->params.p_log_private        = avctx;

  260.     x4->params.i_log_level          = X264_LOG_DEBUG;

  261.     x4->params.i_csp                = convert_pix_fmt(avctx->pix_fmt);

  262. 

  263.     if (avctx->bit_rate) {

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

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

  266.     }

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

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

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

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

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

  272.     } else {

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

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

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

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

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

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

  279.         }

  280. 

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

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

  283.     }

  284. 

  285.     if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy > 0 &&

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

  287.         x4->params.rc.f_vbv_buffer_init =

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

  289.     }

  290. 

  291.     if (avctx->i_quant_factor > 0)

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

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

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

  295. 

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

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

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

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

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

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

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

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

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

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

  306. 

  307.     if (avctx->gop_size >= 0)

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

  309.     if (avctx->max_b_frames >= 0)

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

  311.     if (avctx->scenechange_threshold >= 0)

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

  313.     if (avctx->qmin >= 0)

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

  315.     if (avctx->qmax >= 0)

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

  317.     if (avctx->max_qdiff >= 0)

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

  319.     if (avctx->qblur >= 0)

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

  321.     if (avctx->qcompress >= 0)

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

  323.     if (avctx->refs >= 0)

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

  325.     if (avctx->trellis >= 0)

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

  327.     if (avctx->me_range >= 0)

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

  329.     if (avctx->noise_reduction >= 0)

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

  331.     if (avctx->me_subpel_quality >= 0)

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

  333.     if (avctx->b_frame_strategy >= 0)

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

  335.     if (avctx->keyint_min >= 0)

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

  337.     if (avctx->coder_type >= 0)

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

  339.     if (avctx->me_cmp >= 0)

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

  341. 

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

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

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

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

  346.     PARSE_X264_OPT("psy-rd", psy_rd);

  347.     PARSE_X264_OPT("deblock", deblock);

  348.     PARSE_X264_OPT("partitions", partitions);

  349.     PARSE_X264_OPT("stats", stats);

  350.     if (x4->psy >= 0)

  351.         x4->params.analyse.b_psy  = x4->psy;

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

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

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

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

  356.     if (x4->weightb >= 0)

  357.         x4->params.analyse.b_weighted_bipred = x4->weightb;

  358.     if (x4->cplxblur >= 0)

  359.         x4->params.rc.f_complexity_blur = x4->cplxblur;

  360. 

  361.     if (x4->ssim >= 0)

  362.         x4->params.analyse.b_ssim = x4->ssim;

  363.     if (x4->intra_refresh >= 0)

  364.         x4->params.b_intra_refresh = x4->intra_refresh;

  365.     if (x4->bluray_compat >= 0) {

  366.         x4->params.b_bluray_compat = x4->bluray_compat;

  367.         x4->params.b_vfr_input = 0;

  368.     }

  369.     if (x4->b_bias != INT_MIN)

  370.         x4->params.i_bframe_bias              = x4->b_bias;

  371.     if (x4->b_pyramid >= 0)

  372.         x4->params.i_bframe_pyramid = x4->b_pyramid;

  373.     if (x4->mixed_refs >= 0)

  374.         x4->params.analyse.b_mixed_references = x4->mixed_refs;

  375.     if (x4->dct8x8 >= 0)

  376.         x4->params.analyse.b_transform_8x8    = x4->dct8x8;

  377.     if (x4->fast_pskip >= 0)

  378.         x4->params.analyse.b_fast_pskip       = x4->fast_pskip;

  379.     if (x4->aud >= 0)

  380.         x4->params.b_aud                      = x4->aud;

  381.     if (x4->mbtree >= 0)

  382.         x4->params.rc.b_mb_tree               = x4->mbtree;

  383.     if (x4->direct_pred >= 0)

  384.         x4->params.analyse.i_direct_mv_pred   = x4->direct_pred;

  385. 

  386.     if (x4->slice_max_size >= 0)

  387.         x4->params.i_slice_max_size =  x4->slice_max_size;

  388. 

  389.     if (x4->fastfirstpass)

  390.         x264_param_apply_fastfirstpass(&x4->params);

  391. 

  392.     if (x4->nal_hrd >= 0)

  393.         x4->params.i_nal_hrd = x4->nal_hrd;

  394. 

  395.     if (x4->profile)

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

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

  398.             return AVERROR(EINVAL);

  399.         }

  400. 

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

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

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

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

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

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

  407. 

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

  409. 

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

  411.     if (avctx->thread_type)

  412.         x4->params.b_sliced_threads = avctx->thread_type == FF_THREAD_SLICE;

  413. 

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

  415. 

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

  417. 

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

  419. 

  420.     x4->params.vui.b_fullrange = avctx->pix_fmt == AV_PIX_FMT_YUVJ420P;

  421. 

  422.     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)

  423.         x4->params.b_repeat_headers = 0;

  424. 

  425.     if (x4->x264_params) {

  426.         AVDictionary *dict    = NULL;

  427.         AVDictionaryEntry *en = NULL;

  428. 

  429.         if (!av_dict_parse_string(&dict, x4->x264_params, "=", ":", 0)) {

  430.             while ((en = av_dict_get(dict, "", en, AV_DICT_IGNORE_SUFFIX))) {

  431.                 if (x264_param_parse(&x4->params, en->key, en->value) < 0)

  432.                     av_log(avctx, AV_LOG_WARNING,

  433.                            "Error parsing option '%s = %s'.\n",

  434.                             en->key, en->value);

  435.             }

  436. 

  437.             av_dict_free(&dict);

  438.         }

  439.     }

  440. 

  441.     // update AVCodecContext with x264 parameters

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

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

  444.     if (avctx->max_b_frames < 0)

  445.         avctx->max_b_frames = 0;

  446. 

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

  448. 

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

  450.     if (!x4->enc)

  451.         return -1;

  452. 

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

  454. 

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

  456.         x264_nal_t *nal;

  457.         uint8_t *p;

  458.         int nnal, s, i;

  459. 

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

  461.         avctx->extradata = p = av_malloc(s);

  462. 

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

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

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

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

  467.                 x4->sei_size = nal[i].i_payload;

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

  469.                 memcpy(x4->sei, nal[i].p_payload, nal[i].i_payload);

  470.                 continue;

  471.             }

  472.             memcpy(p, nal[i].p_payload, nal[i].i_payload);

  473.             p += nal[i].i_payload;

  474.         }

  475.         avctx->extradata_size = p - avctx->extradata;

  476.     }

  477. 

  478.     return 0;

  479. }

  480. 

  481. static const enum AVPixelFormat pix_fmts_8bit[] = {

  482.     AV_PIX_FMT_YUV420P,

  483.     AV_PIX_FMT_YUVJ420P,

  484.     AV_PIX_FMT_YUV422P,

  485.     AV_PIX_FMT_YUV444P,

  486.     AV_PIX_FMT_NV12,

  487.     AV_PIX_FMT_NV16,

  488.     AV_PIX_FMT_NONE

  489. };

  490. static const enum AVPixelFormat pix_fmts_9bit[] = {

  491.     AV_PIX_FMT_YUV420P9,

  492.     AV_PIX_FMT_YUV444P9,

  493.     AV_PIX_FMT_NONE

  494. };

  495. static const enum AVPixelFormat pix_fmts_10bit[] = {

  496.     AV_PIX_FMT_YUV420P10,

  497.     AV_PIX_FMT_YUV422P10,

  498.     AV_PIX_FMT_YUV444P10,

  499.     AV_PIX_FMT_NV20,

  500.     AV_PIX_FMT_NONE

  501. };

  502. 

  503. static av_cold void X264_init_static(AVCodec *codec)

  504. {

  505.     if (x264_bit_depth == 8)

  506.         codec->pix_fmts = pix_fmts_8bit;

  507.     else if (x264_bit_depth == 9)

  508.         codec->pix_fmts = pix_fmts_9bit;

  509.     else if (x264_bit_depth == 10)

  510.         codec->pix_fmts = pix_fmts_10bit;

  511. }

  512. 

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

  514. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  515. static const AVOption options[] = {

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

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

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

  519.     { "fastfirstpass", "Use fast settings when encoding first pass",      OFFSET(fastfirstpass), AV_OPT_TYPE_INT,    { .i64 = 1 }, 0, 1, VE},

  520.     { "crf",           "Select the quality for constant quality mode",    OFFSET(crf),           AV_OPT_TYPE_FLOAT,  {.dbl = -1 }, -1, FLT_MAX, VE },

  521.     { "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 },

  522.     { "qp",            "Constant quantization parameter rate control method",OFFSET(cqp),        AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE },

  523.     { "aq-mode",       "AQ method",                                       OFFSET(aq_mode),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "aq_mode"},

  524.     { "none",          NULL,                              0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_NONE},         INT_MIN, INT_MAX, VE, "aq_mode" },

  525.     { "variance",      "Variance AQ (complexity mask)",   0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_VARIANCE},     INT_MIN, INT_MAX, VE, "aq_mode" },

  526.     { "autovariance",  "Auto-variance AQ (experimental)", 0, AV_OPT_TYPE_CONST, {.i64 = X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },

  527.     { "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},

  528.     { "psy",           "Use psychovisual optimizations.",                 OFFSET(psy),           AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE },

  529.     { "psy-rd",        "Strength of psychovisual optimization, in <psy-rd>:<psy-trellis> format.", OFFSET(psy_rd), AV_OPT_TYPE_STRING,  {0 }, 0, 0, VE},

  530.     { "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 },

  531.     { "weightb",       "Weighted prediction for B-frames.",               OFFSET(weightb),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE },

  532.     { "weightp",       "Weighted prediction analysis method.",            OFFSET(weightp),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "weightp" },

  533.     { "none",          NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_NONE},   INT_MIN, INT_MAX, VE, "weightp" },

  534.     { "simple",        NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },

  535.     { "smart",         NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_WEIGHTP_SMART},  INT_MIN, INT_MAX, VE, "weightp" },

  536.     { "ssim",          "Calculate and print SSIM stats.",                 OFFSET(ssim),          AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE },

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

  538.     { "bluray-compat", "Bluray compatibility workarounds.",               OFFSET(bluray_compat) ,AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE },

  539.     { "b-bias",        "Influences how often B-frames are used",          OFFSET(b_bias),        AV_OPT_TYPE_INT,    { .i64 = INT_MIN}, INT_MIN, INT_MAX, VE },

  540.     { "b-pyramid",     "Keep some B-frames as references.",               OFFSET(b_pyramid),     AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "b_pyramid" },

  541.     { "none",          NULL,                                  0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_NONE},   INT_MIN, INT_MAX, VE, "b_pyramid" },

  542.     { "strict",        "Strictly hierarchical pyramid",       0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_STRICT}, INT_MIN, INT_MAX, VE, "b_pyramid" },

  543.     { "normal",        "Non-strict (not Blu-ray compatible)", 0, AV_OPT_TYPE_CONST, {.i64 = X264_B_PYRAMID_NORMAL}, INT_MIN, INT_MAX, VE, "b_pyramid" },

  544.     { "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 },

  545.     { "8x8dct",        "High profile 8x8 transform.",                     OFFSET(dct8x8),        AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE},

  546.     { "fast-pskip",    NULL,                                              OFFSET(fast_pskip),    AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE},

  547.     { "aud",           "Use access unit delimiters.",                     OFFSET(aud),           AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE},

  548.     { "mbtree",        "Use macroblock tree ratecontrol.",                OFFSET(mbtree),        AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, 1, VE},

  549.     { "deblock",       "Loop filter parameters, in <alpha:beta> form.",   OFFSET(deblock),       AV_OPT_TYPE_STRING, { 0 },  0, 0, VE},

  550.     { "cplxblur",      "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), AV_OPT_TYPE_FLOAT,  {.dbl = -1 }, -1, FLT_MAX, VE},

  551.     { "partitions",    "A comma-separated list of partitions to consider. "

  552.                        "Possible values: p8x8, p4x4, b8x8, i8x8, i4x4, none, all", OFFSET(partitions), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},

  553.     { "direct-pred",   "Direct MV prediction mode",                       OFFSET(direct_pred),   AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "direct-pred" },

  554.     { "none",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_NONE },     0, 0, VE, "direct-pred" },

  555.     { "spatial",       NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_SPATIAL },  0, 0, VE, "direct-pred" },

  556.     { "temporal",      NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },

  557.     { "auto",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = X264_DIRECT_PRED_AUTO },     0, 0, VE, "direct-pred" },

  558.     { "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 },

  559.     { "stats",         "Filename for 2 pass stats",                       OFFSET(stats),         AV_OPT_TYPE_STRING, { 0 },  0,       0, VE },

  560.     { "nal-hrd",       "Signal HRD information (requires vbv-bufsize; "

  561.                        "cbr not allowed in .mp4)",                        OFFSET(nal_hrd),       AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, INT_MAX, VE, "nal-hrd" },

  562.     { "none",          NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_NAL_HRD_NONE}, INT_MIN, INT_MAX, VE, "nal-hrd" },

  563.     { "vbr",           NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_NAL_HRD_VBR},  INT_MIN, INT_MAX, VE, "nal-hrd" },

  564.     { "cbr",           NULL, 0, AV_OPT_TYPE_CONST, {.i64 = X264_NAL_HRD_CBR},  INT_MIN, INT_MAX, VE, "nal-hrd" },

  565.     { "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 },

  566.     { NULL },

  567. };

  568. 

  569. static const AVClass class = {

  570.     .class_name = "libx264",

  571.     .item_name  = av_default_item_name,

  572.     .option     = options,

  573.     .version    = LIBAVUTIL_VERSION_INT,

  574. };

  575. 

  576. static const AVCodecDefault x264_defaults[] = {

  577.     { "b",                "0" },

  578.     { "bf",               "-1" },

  579.     { "g",                "-1" },

  580.     { "i_qfactor",        "-1" },

  581.     { "qmin",             "-1" },

  582.     { "qmax",             "-1" },

  583.     { "qdiff",            "-1" },

  584.     { "qblur",            "-1" },

  585.     { "qcomp",            "-1" },

  586.     { "refs",             "-1" },

  587.     { "sc_threshold",     "-1" },

  588.     { "trellis",          "-1" },

  589.     { "nr",               "-1" },

  590.     { "me_range",         "-1" },

  591.     { "me_method",        "-1" },

  592.     { "subq",             "-1" },

  593.     { "b_strategy",       "-1" },

  594.     { "keyint_min",       "-1" },

  595.     { "coder",            "-1" },

  596.     { "cmp",              "-1" },

  597.     { "threads",          AV_STRINGIFY(X264_THREADS_AUTO) },

  598.     { "thread_type",      "0" },

  599.     { "flags",            "+cgop" },

  600.     { "rc_init_occupancy","-1" },

  601.     { NULL },

  602. };

  603. 

  604. AVCodec ff_libx264_encoder = {

  605.     .name             = "libx264",

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

  607.     .type             = AVMEDIA_TYPE_VIDEO,

  608.     .id               = AV_CODEC_ID_H264,

  609.     .priv_data_size   = sizeof(X264Context),

  610.     .init             = X264_init,

  611.     .encode2          = X264_frame,

  612.     .close            = X264_close,

  613.     .capabilities     = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,

  614.     .priv_class       = &class,

  615.     .defaults         = x264_defaults,

  616.     .init_static_data = X264_init_static,

  617. };