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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 "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.     int fastfirstpass;

  44.     float crf;

  45.     float crf_max;

  46.     int cqp;

  47.     int aq_mode;

  48.     float aq_strength;

  49.     char *psy_rd;

  50.     int psy;

  51.     int rc_lookahead;

  52.     int weightp;

  53.     int weightb;

  54.     int ssim;

  55.     int intra_refresh;

  56.     int b_bias;

  57.     int b_pyramid;

  58.     int mixed_refs;

  59.     int dct8x8;

  60.     int fast_pskip;

  61.     int aud;

  62.     int mbtree;

  63.     char *deblock;

  64.     float cplxblur;

  65.     char *partitions;

  66.     int direct_pred;

  67. } X264Context;

  68. 

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

  70. {

  71.     static const int level_map[] = {

  72.         [X264_LOG_ERROR]   = AV_LOG_ERROR,

  73.         [X264_LOG_WARNING] = AV_LOG_WARNING,

  74.         [X264_LOG_INFO]    = AV_LOG_INFO,

  75.         [X264_LOG_DEBUG]   = AV_LOG_DEBUG

  76.     };

  77. 

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

  79.         return;

  80. 

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

  82. }

  83. 

  84. 

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

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

  87. {

  88.     X264Context *x4 = ctx->priv_data;

  89.     uint8_t *p = buf;

  90.     int i;

  91. 

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

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

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

  95.         p += x4->sei_size;

  96.         x4->sei_size = 0;

  97.     }

  98. 

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

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

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

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

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

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

  105.             continue;

  106.         }

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

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

  109.     }

  110. 

  111.     return p - buf;

  112. }

  113. 

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

  115.                       int bufsize, void *data)

  116. {

  117.     X264Context *x4 = ctx->priv_data;

  118.     AVFrame *frame = data;

  119.     x264_nal_t *nal;

  120.     int nnal, i;

  121.     x264_picture_t pic_out;

  122. 

  123.     x264_picture_init( &x4->pic );

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

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

  126. 

  127.     if (frame) {

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

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

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

  131.         }

  132. 

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

  134.         x4->pic.i_type =

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

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

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

  138.                                             X264_TYPE_AUTO;

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

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

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

  142.         }

  143.     }

  144. 

  145.     do {

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

  147.         return -1;

  148. 

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

  150.     if (bufsize < 0)

  151.         return -1;

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

  153. 

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

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

  156. 

  157.     switch (pic_out.i_type) {

  158.     case X264_TYPE_IDR:

  159.     case X264_TYPE_I:

  160.         x4->out_pic.pict_type = AV_PICTURE_TYPE_I;

  161.         break;

  162.     case X264_TYPE_P:

  163.         x4->out_pic.pict_type = AV_PICTURE_TYPE_P;

  164.         break;

  165.     case X264_TYPE_B:

  166.     case X264_TYPE_BREF:

  167.         x4->out_pic.pict_type = AV_PICTURE_TYPE_B;

  168.         break;

  169.     }

  170. 

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

  172.     if (bufsize)

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

  174. 

  175.     return bufsize;

  176. }

  177. 

  178. static av_cold int X264_close(AVCodecContext *avctx)

  179. {

  180.     X264Context *x4 = avctx->priv_data;

  181. 

  182.     av_freep(&avctx->extradata);

  183.     av_free(x4->sei);

  184. 

  185.     if (x4->enc)

  186.         x264_encoder_close(x4->enc);

  187. 

  188.     return 0;

  189. }

  190. 

  191. #define PARSE_X264_OPT(name, var)\

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

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

  194.         return AVERROR(EINVAL);\

  195.     }

  196. 

  197. static av_cold int X264_init(AVCodecContext *avctx)

  198. {

  199.     X264Context *x4 = avctx->priv_data;

  200. 

  201.     x264_param_default(&x4->params);

  202. 

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

  204. 

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

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

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

  208.             return AVERROR(EINVAL);

  209.         }

  210. 

  211.     if (avctx->level > 0)

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

  213. 

  214.     x4->params.pf_log               = X264_log;

  215.     x4->params.p_log_private        = avctx;

  216.     x4->params.i_log_level          = X264_LOG_DEBUG;

  217. 

  218.     if (avctx->bit_rate) {

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

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

  221.     }

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

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

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

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

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

  227.     } else {

  228. #if FF_API_X264_GLOBAL_OPTS

  229.         if (avctx->crf) {

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

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

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

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

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

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

  236.         }

  237. #endif

  238. 

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

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

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

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

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

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

  245.         }

  246. 

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

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

  249.     }

  250. 

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

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

  253.         x4->params.rc.f_vbv_buffer_init =

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

  255.     }

  256. 

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

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

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

  260. 

  261. #if FF_API_X264_GLOBAL_OPTS

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

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

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

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

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

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

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

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

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

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

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

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

  274.     if (avctx->bframebias)

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

  276.     if (avctx->deblockalpha)

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

  278.     if (avctx->deblockbeta)

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

  280.     if (avctx->complexityblur >= 0)

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

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

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

  284.     if (avctx->partitions) {

  285.         if (avctx->partitions & X264_PART_I4X4)

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

  287.         if (avctx->partitions & X264_PART_I8X8)

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

  289.         if (avctx->partitions & X264_PART_P8X8)

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

  291.         if (avctx->partitions & X264_PART_P4X4)

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

  293.         if (avctx->partitions & X264_PART_B8X8)

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

  295.     }

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

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

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

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

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

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

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

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

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

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

  306. #endif

  307. 

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

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

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

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

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

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

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

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

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

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

  318. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  353. 

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

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

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

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

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

  359.     PARSE_X264_OPT("deblock", deblock);

  360.     PARSE_X264_OPT("partitions", partitions);

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

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

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

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

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

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

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

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

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

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

  371. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  392. 

  393.     if (x4->fastfirstpass)

  394.         x264_param_apply_fastfirstpass(&x4->params);

  395. 

  396.     if (x4->profile)

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

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

  399.             return AVERROR(EINVAL);

  400.         }

  401. 

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

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

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

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

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

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

  408. 

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

  410. 

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

  412. 

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

  414. 

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

  416. 

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

  418. 

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

  420. 

  421.     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)

  422.         x4->params.b_repeat_headers = 0;

  423. 

  424.     // update AVCodecContext with x264 parameters

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

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

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

  428. #if FF_API_X264_GLOBAL_OPTS

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

  430. #endif

  431. 

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

  433.     if (!x4->enc)

  434.         return -1;

  435. 

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

  437. 

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

  439.         x264_nal_t *nal;

  440.         int nnal, s, i;

  441. 

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

  443. 

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

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

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

  447. 

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

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

  450.     }

  451. 

  452.     return 0;

  453. }

  454. 

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

  456. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  457. static const AVOption options[] = {

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

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

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

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

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

  463.     { "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 },

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

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

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

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

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

  469.     { "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},

  470.     { "psy",           "Use psychovisual optimizations.",                 OFFSET(psy),           FF_OPT_TYPE_INT,    {-1 }, -1, 1, VE },

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

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

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

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

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

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

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

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

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

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

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

  482.     { "none",          NULL,                                  0, FF_OPT_TYPE_CONST, {X264_B_PYRAMID_NONE},   INT_MIN, INT_MAX, VE, "b_pyramid" },

  483.     { "strict",        "Strictly hierarchical pyramid",       0, FF_OPT_TYPE_CONST, {X264_B_PYRAMID_STRICT}, INT_MIN, INT_MAX, VE, "b_pyramid" },

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

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

  486.     { "8x8dct",        "High profile 8x8 transform.",                     OFFSET(dct8x8),        FF_OPT_TYPE_INT,    {-1 }, -1, 1, VE},

  487.     { "fast-pskip",    NULL,                                              OFFSET(fast_pskip),    FF_OPT_TYPE_INT,    {-1 }, -1, 1, VE},

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

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

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

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

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

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

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

  495.     { "none",          NULL,      0,    FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_NONE },     0, 0, VE, "direct-pred" },

  496.     { "spatial",       NULL,      0,    FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_SPATIAL },  0, 0, VE, "direct-pred" },

  497.     { "temporal",      NULL,      0,    FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },

  498.     { "auto",          NULL,      0,    FF_OPT_TYPE_CONST, { X264_DIRECT_PRED_AUTO },     0, 0, VE, "direct-pred" },

  499.     { NULL },

  500. };

  501. 

  502. static const AVClass class = {

  503.     .class_name = "libx264",

  504.     .item_name  = av_default_item_name,

  505.     .option     = options,

  506.     .version    = LIBAVUTIL_VERSION_INT,

  507. };

  508. 

  509. static const AVCodecDefault x264_defaults[] = {

  510.     { "b",                "0" },

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  530.     { NULL },

  531. };

  532. 

  533. AVCodec ff_libx264_encoder = {

  534.     .name           = "libx264",

  535.     .type           = AVMEDIA_TYPE_VIDEO,

  536.     .id             = CODEC_ID_H264,

  537.     .priv_data_size = sizeof(X264Context),

  538.     .init           = X264_init,

  539.     .encode         = X264_frame,

  540.     .close          = X264_close,

  541.     .capabilities   = CODEC_CAP_DELAY,

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

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

  544.     .priv_class     = &class,

  545.     .defaults       = x264_defaults,

  546. };