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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. } X264Context;

  70. 

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

  72. {

  73.     static const int level_map[] = {

  74.         [X264_LOG_ERROR]   = AV_LOG_ERROR,

  75.         [X264_LOG_WARNING] = AV_LOG_WARNING,

  76.         [X264_LOG_INFO]    = AV_LOG_INFO,

  77.         [X264_LOG_DEBUG]   = AV_LOG_DEBUG

  78.     };

  79. 

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

  81.         return;

  82. 

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

  84. }

  85. 

  86. 

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

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

  89. {

  90.     X264Context *x4 = ctx->priv_data;

  91.     uint8_t *p = buf;

  92.     int i;

  93. 

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

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

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

  97.         p += x4->sei_size;

  98.         x4->sei_size = 0;

  99.     }

  100. 

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

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

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

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

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

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

  107.             continue;

  108.         }

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

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

  111.     }

  112. 

  113.     return p - buf;

  114. }

  115. 

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

  117.                       int bufsize, void *data)

  118. {

  119.     X264Context *x4 = ctx->priv_data;

  120.     AVFrame *frame = data;

  121.     x264_nal_t *nal;

  122.     int nnal, i;

  123.     x264_picture_t pic_out;

  124. 

  125.     x264_picture_init( &x4->pic );

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

  127.     if (x264_bit_depth > 8)

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

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

  130. 

  131.     if (frame) {

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

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

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

  135.         }

  136. 

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

  138.         x4->pic.i_type =

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

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

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

  142.                                             X264_TYPE_AUTO;

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

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

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

  146.         }

  147.     }

  148. 

  149.     do {

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

  151.         return -1;

  152. 

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

  154.     if (bufsize < 0)

  155.         return -1;

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

  157. 

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

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

  160. 

  161.     switch (pic_out.i_type) {

  162.     case X264_TYPE_IDR:

  163.     case X264_TYPE_I:

  164.         x4->out_pic.pict_type = AV_PICTURE_TYPE_I;

  165.         break;

  166.     case X264_TYPE_P:

  167.         x4->out_pic.pict_type = AV_PICTURE_TYPE_P;

  168.         break;

  169.     case X264_TYPE_B:

  170.     case X264_TYPE_BREF:

  171.         x4->out_pic.pict_type = AV_PICTURE_TYPE_B;

  172.         break;

  173.     }

  174. 

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

  176.     if (bufsize)

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

  178. 

  179.     return bufsize;

  180. }

  181. 

  182. static av_cold int X264_close(AVCodecContext *avctx)

  183. {

  184.     X264Context *x4 = avctx->priv_data;

  185. 

  186.     av_freep(&avctx->extradata);

  187.     av_free(x4->sei);

  188. 

  189.     if (x4->enc)

  190.         x264_encoder_close(x4->enc);

  191. 

  192.     return 0;

  193. }

  194. 

  195. static int convert_pix_fmt(enum PixelFormat pix_fmt)

  196. {

  197.     switch (pix_fmt) {

  198.     case PIX_FMT_YUV420P:

  199.     case PIX_FMT_YUVJ420P:

  200.     case PIX_FMT_YUV420P9:

  201.     case PIX_FMT_YUV420P10: return X264_CSP_I420;

  202.     case PIX_FMT_YUV422P:

  203.     case PIX_FMT_YUV422P10: return X264_CSP_I422;

  204.     case PIX_FMT_YUV444P:

  205.     case PIX_FMT_YUV444P9:

  206.     case PIX_FMT_YUV444P10: return X264_CSP_I444;

  207.     };

  208.     return 0;

  209. }

  210. 

  211. #define PARSE_X264_OPT(name, var)\

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

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

  214.         return AVERROR(EINVAL);\

  215.     }

  216. 

  217. static av_cold int X264_init(AVCodecContext *avctx)

  218. {

  219.     X264Context *x4 = avctx->priv_data;

  220. 

  221.     x264_param_default(&x4->params);

  222. 

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

  224. 

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

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

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

  228.             return AVERROR(EINVAL);

  229.         }

  230. 

  231.     if (avctx->level > 0)

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

  233. 

  234.     x4->params.pf_log               = X264_log;

  235.     x4->params.p_log_private        = avctx;

  236.     x4->params.i_log_level          = X264_LOG_DEBUG;

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

  238. 

  239.     if (avctx->bit_rate) {

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

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

  242.     }

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

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

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

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

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

  248.     } else {

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

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

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

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

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

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

  255.         }

  256. 

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

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

  259.     }

  260. 

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

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

  263.         x4->params.rc.f_vbv_buffer_init =

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

  265.     }

  266. 

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

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

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

  270. 

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

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

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

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

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

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

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

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

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

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

  281. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  316. 

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

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

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

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

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

  322.     PARSE_X264_OPT("deblock", deblock);

  323.     PARSE_X264_OPT("partitions", partitions);

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

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

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

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

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

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

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

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

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

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

  334. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  355. 

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

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

  358. 

  359.     if (x4->fastfirstpass)

  360.         x264_param_apply_fastfirstpass(&x4->params);

  361. 

  362.     if (x4->profile)

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

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

  365.             return AVERROR(EINVAL);

  366.         }

  367. 

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

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

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

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

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

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

  374. 

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

  376. 

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

  378. 

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

  380. 

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

  382. 

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

  384. 

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

  386. 

  387.     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)

  388.         x4->params.b_repeat_headers = 0;

  389. 

  390.     // update AVCodecContext with x264 parameters

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

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

  393.     if (avctx->max_b_frames < 0)

  394.         avctx->max_b_frames = 0;

  395. 

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

  397. 

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

  399.     if (!x4->enc)

  400.         return -1;

  401. 

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

  403. 

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

  405.         x264_nal_t *nal;

  406.         int nnal, s, i;

  407. 

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

  409. 

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

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

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

  413. 

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

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

  416.     }

  417. 

  418.     return 0;

  419. }

  420. 

  421. static const enum PixelFormat pix_fmts_8bit[] = {

  422.     PIX_FMT_YUV420P,

  423.     PIX_FMT_YUVJ420P,

  424.     PIX_FMT_YUV422P,

  425.     PIX_FMT_YUV444P,

  426.     PIX_FMT_NONE

  427. };

  428. static const enum PixelFormat pix_fmts_9bit[] = {

  429.     PIX_FMT_YUV420P9,

  430.     PIX_FMT_YUV444P9,

  431.     PIX_FMT_NONE

  432. };

  433. static const enum PixelFormat pix_fmts_10bit[] = {

  434.     PIX_FMT_YUV420P10,

  435.     PIX_FMT_YUV422P10,

  436.     PIX_FMT_YUV444P10,

  437.     PIX_FMT_NONE

  438. };

  439. 

  440. static av_cold void X264_init_static(AVCodec *codec)

  441. {

  442.     if (x264_bit_depth == 8)

  443.         codec->pix_fmts = pix_fmts_8bit;

  444.     else if (x264_bit_depth == 9)

  445.         codec->pix_fmts = pix_fmts_9bit;

  446.     else if (x264_bit_depth == 10)

  447.         codec->pix_fmts = pix_fmts_10bit;

  448. }

  449. 

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

  451. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  452. static const AVOption options[] = {

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

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

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

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

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

  458.     { "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 },

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

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

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

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

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

  464.     { "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},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  481.     { "8x8dct",        "High profile 8x8 transform.",                     OFFSET(dct8x8),        AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE},

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

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

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

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

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

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

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

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

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

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

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

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

  494.     { "slice-max-size","Constant quantization parameter rate control method",OFFSET(slice_max_size),        AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE },

  495.     { NULL },

  496. };

  497. 

  498. static const AVClass class = {

  499.     .class_name = "libx264",

  500.     .item_name  = av_default_item_name,

  501.     .option     = options,

  502.     .version    = LIBAVUTIL_VERSION_INT,

  503. };

  504. 

  505. static const AVCodecDefault x264_defaults[] = {

  506.     { "b",                "0" },

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  526.     { NULL },

  527. };

  528. 

  529. AVCodec ff_libx264_encoder = {

  530.     .name           = "libx264",

  531.     .type           = AVMEDIA_TYPE_VIDEO,

  532.     .id             = CODEC_ID_H264,

  533.     .priv_data_size = sizeof(X264Context),

  534.     .init           = X264_init,

  535.     .encode         = X264_frame,

  536.     .close          = X264_close,

  537.     .capabilities   = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,

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

  539.     .priv_class     = &class,

  540.     .defaults       = x264_defaults,

  541.     .init_static_data = X264_init_static,

  542. };