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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/opt.h"

  23. #include "libavutil/pixdesc.h"

  24. #include "avcodec.h"

  25. #include "internal.h"

  26. #include <x264.h>

  27. #include <float.h>

  28. #include <math.h>

  29. #include <stdio.h>

  30. #include <stdlib.h>

  31. #include <string.h>

  32. 

  33. typedef struct X264Context {

  34.     AVClass        *class;

  35.     x264_param_t    params;

  36.     x264_t         *enc;

  37.     x264_picture_t  pic;

  38.     uint8_t        *sei;

  39.     int             sei_size;

  40.     AVFrame         out_pic;

  41.     char *preset;

  42.     char *tune;

  43.     char *profile;

  44.     int fastfirstpass;

  45.     float crf;

  46.     float crf_max;

  47.     int cqp;

  48.     int aq_mode;

  49.     float aq_strength;

  50.     char *psy_rd;

  51.     int psy;

  52.     int rc_lookahead;

  53.     int weightp;

  54.     int weightb;

  55.     int ssim;

  56.     int intra_refresh;

  57.     int b_bias;

  58.     int b_pyramid;

  59.     int mixed_refs;

  60.     int dct8x8;

  61.     int fast_pskip;

  62.     int aud;

  63.     int mbtree;

  64.     char *deblock;

  65.     float cplxblur;

  66.     char *partitions;

  67.     int direct_pred;

  68.     int slice_max_size;

  69.     char *stats;

  70. } X264Context;

  71. 

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

  73. {

  74.     static const int level_map[] = {

  75.         [X264_LOG_ERROR]   = AV_LOG_ERROR,

  76.         [X264_LOG_WARNING] = AV_LOG_WARNING,

  77.         [X264_LOG_INFO]    = AV_LOG_INFO,

  78.         [X264_LOG_DEBUG]   = AV_LOG_DEBUG

  79.     };

  80. 

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

  82.         return;

  83. 

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

  85. }

  86. 

  87. 

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

  89.                        x264_nal_t *nals, int nnal)

  90. {

  91.     X264Context *x4 = ctx->priv_data;

  92.     uint8_t *p;

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

  94. 

  95.     if (!nnal)

  96.         return 0;

  97. 

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

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

  100. 

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

  102.         return ret;

  103. 

  104.     p = pkt->data;

  105. 

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

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

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

  109.         p += x4->sei_size;

  110.         x4->sei_size = 0;

  111.     }

  112. 

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

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

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

  116.     }

  117. 

  118.     return 1;

  119. }

  120. 

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

  122.                       int *got_packet)

  123. {

  124.     X264Context *x4 = ctx->priv_data;

  125.     x264_nal_t *nal;

  126.     int nnal, i, ret;

  127.     x264_picture_t pic_out;

  128. 

  129.     x264_picture_init( &x4->pic );

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

  131.     if (x264_bit_depth > 8)

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

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

  134. 

  135.     if (frame) {

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

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

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

  139.         }

  140. 

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

  142.         x4->pic.i_type =

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

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

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

  146.                                             X264_TYPE_AUTO;

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

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

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

  150.         }

  151.     }

  152. 

  153.     do {

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

  155.             return -1;

  156. 

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

  158.         if (ret < 0)

  159.             return -1;

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

  161. 

  162.     pkt->pts = pic_out.i_pts;

  163.     pkt->dts = pic_out.i_dts;

  164. 

  165.     switch (pic_out.i_type) {

  166.     case X264_TYPE_IDR:

  167.     case X264_TYPE_I:

  168.         x4->out_pic.pict_type = AV_PICTURE_TYPE_I;

  169.         break;

  170.     case X264_TYPE_P:

  171.         x4->out_pic.pict_type = AV_PICTURE_TYPE_P;

  172.         break;

  173.     case X264_TYPE_B:

  174.     case X264_TYPE_BREF:

  175.         x4->out_pic.pict_type = AV_PICTURE_TYPE_B;

  176.         break;

  177.     }

  178. 

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

  180.     if (ret)

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

  182. 

  183.     *got_packet = ret;

  184.     return 0;

  185. }

  186. 

  187. static av_cold int X264_close(AVCodecContext *avctx)

  188. {

  189.     X264Context *x4 = avctx->priv_data;

  190. 

  191.     av_freep(&avctx->extradata);

  192.     av_free(x4->sei);

  193. 

  194.     if (x4->enc)

  195.         x264_encoder_close(x4->enc);

  196. 

  197.     return 0;

  198. }

  199. 

  200. static int convert_pix_fmt(enum PixelFormat pix_fmt)

  201. {

  202.     switch (pix_fmt) {

  203.     case PIX_FMT_YUV420P:

  204.     case PIX_FMT_YUVJ420P:

  205.     case PIX_FMT_YUV420P9:

  206.     case PIX_FMT_YUV420P10: return X264_CSP_I420;

  207.     case PIX_FMT_YUV422P:

  208.     case PIX_FMT_YUV422P10: return X264_CSP_I422;

  209.     case PIX_FMT_YUV444P:

  210.     case PIX_FMT_YUV444P9:

  211.     case PIX_FMT_YUV444P10: return X264_CSP_I444;

  212.     };

  213.     return 0;

  214. }

  215. 

  216. #define PARSE_X264_OPT(name, var)\

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

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

  219.         return AVERROR(EINVAL);\

  220.     }

  221. 

  222. static av_cold int X264_init(AVCodecContext *avctx)

  223. {

  224.     X264Context *x4 = avctx->priv_data;

  225. 

  226.     x264_param_default(&x4->params);

  227. 

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

  229. 

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

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

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

  233.             return AVERROR(EINVAL);

  234.         }

  235. 

  236.     if (avctx->level > 0)

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

  238. 

  239.     x4->params.pf_log               = X264_log;

  240.     x4->params.p_log_private        = avctx;

  241.     x4->params.i_log_level          = X264_LOG_DEBUG;

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

  243. 

  244.     if (avctx->bit_rate) {

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

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

  247.     }

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

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

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

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

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

  253.     } else {

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

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

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

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

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

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

  260.         }

  261. 

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

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

  264.     }

  265. 

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

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

  268.         x4->params.rc.f_vbv_buffer_init =

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

  270.     }

  271. 

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

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

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

  275. 

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

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

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

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

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

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

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

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

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

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

  286. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  321. 

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

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

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

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

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

  327.     PARSE_X264_OPT("deblock", deblock);

  328.     PARSE_X264_OPT("partitions", partitions);

  329.     PARSE_X264_OPT("stats", stats);

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

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

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

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

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

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

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

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

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

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

  340. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  361. 

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

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

  364. 

  365.     if (x4->fastfirstpass)

  366.         x264_param_apply_fastfirstpass(&x4->params);

  367. 

  368.     if (x4->profile)

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

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

  371.             return AVERROR(EINVAL);

  372.         }

  373. 

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

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

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

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

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

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

  380. 

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

  382. 

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

  384.     if (avctx->thread_type)

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

  386. 

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

  388. 

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

  390. 

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

  392. 

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

  394. 

  395.     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)

  396.         x4->params.b_repeat_headers = 0;

  397. 

  398.     // update AVCodecContext with x264 parameters

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

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

  401.     if (avctx->max_b_frames < 0)

  402.         avctx->max_b_frames = 0;

  403. 

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

  405. 

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

  407.     if (!x4->enc)

  408.         return -1;

  409. 

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

  411. 

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

  413.         x264_nal_t *nal;

  414.         uint8_t *p;

  415.         int nnal, s, i;

  416. 

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

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

  419. 

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

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

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

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

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

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

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

  427.                 continue;

  428.             }

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

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

  431.         }

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

  433.     }

  434. 

  435.     return 0;

  436. }

  437. 

  438. static const enum PixelFormat pix_fmts_8bit[] = {

  439.     PIX_FMT_YUV420P,

  440.     PIX_FMT_YUVJ420P,

  441.     PIX_FMT_YUV422P,

  442.     PIX_FMT_YUV444P,

  443.     PIX_FMT_NONE

  444. };

  445. static const enum PixelFormat pix_fmts_9bit[] = {

  446.     PIX_FMT_YUV420P9,

  447.     PIX_FMT_YUV444P9,

  448.     PIX_FMT_NONE

  449. };

  450. static const enum PixelFormat pix_fmts_10bit[] = {

  451.     PIX_FMT_YUV420P10,

  452.     PIX_FMT_YUV422P10,

  453.     PIX_FMT_YUV444P10,

  454.     PIX_FMT_NONE

  455. };

  456. 

  457. static av_cold void X264_init_static(AVCodec *codec)

  458. {

  459.     if (x264_bit_depth == 8)

  460.         codec->pix_fmts = pix_fmts_8bit;

  461.     else if (x264_bit_depth == 9)

  462.         codec->pix_fmts = pix_fmts_9bit;

  463.     else if (x264_bit_depth == 10)

  464.         codec->pix_fmts = pix_fmts_10bit;

  465. }

  466. 

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

  468. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  469. static const AVOption options[] = {

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

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

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

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

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

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

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

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

  478.     { "none",          NULL,                              0, AV_OPT_TYPE_CONST, {X264_AQ_NONE},         INT_MIN, INT_MAX, VE, "aq_mode" },

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

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

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

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

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

  484.     { "rc-lookahead",  "Number of frames to look ahead for frametype and ratecontrol", OFFSET(rc_lookahead), AV_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },

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

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

  487.     { "none",          NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_NONE},   INT_MIN, INT_MAX, VE, "weightp" },

  488.     { "simple",        NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },

  489.     { "smart",         NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_SMART},  INT_MIN, INT_MAX, VE, "weightp" },

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

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

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

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

  494.     { "none",          NULL,                                  0, AV_OPT_TYPE_CONST, {X264_B_PYRAMID_NONE},   INT_MIN, INT_MAX, VE, "b_pyramid" },

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

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

  497.     { "mixed-refs",    "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), AV_OPT_TYPE_INT, {-1}, -1, 1, VE },

  498.     { "8x8dct",        "High profile 8x8 transform.",                     OFFSET(dct8x8),        AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE},

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

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

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

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

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

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

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

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

  507.     { "none",          NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_NONE },     0, 0, VE, "direct-pred" },

  508.     { "spatial",       NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_SPATIAL },  0, 0, VE, "direct-pred" },

  509.     { "temporal",      NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },

  510.     { "auto",          NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_AUTO },     0, 0, VE, "direct-pred" },

  511.     { "slice-max-size","Limit the size of each slice in bytes",           OFFSET(slice_max_size),AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE },

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

  513.     { NULL },

  514. };

  515. 

  516. static const AVClass class = {

  517.     .class_name = "libx264",

  518.     .item_name  = av_default_item_name,

  519.     .option     = options,

  520.     .version    = LIBAVUTIL_VERSION_INT,

  521. };

  522. 

  523. static const AVCodecDefault x264_defaults[] = {

  524.     { "b",                "0" },

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  544.     { "thread_type",      "0" },

  545.     { NULL },

  546. };

  547. 

  548. AVCodec ff_libx264_encoder = {

  549.     .name             = "libx264",

  550.     .type             = AVMEDIA_TYPE_VIDEO,

  551.     .id               = CODEC_ID_H264,

  552.     .priv_data_size   = sizeof(X264Context),

  553.     .init             = X264_init,

  554.     .encode2          = X264_frame,

  555.     .close            = X264_close,

  556.     .capabilities     = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,

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

  558.     .priv_class       = &class,

  559.     .defaults         = x264_defaults,

  560.     .init_static_data = X264_init_static,

  561. };