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FFmpeg/libavcodec/libx264.c

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  1. /*

  2.  * H.264 encoding using the x264 library

  3.  * Copyright (C) 2005  Mans Rullgard <mans@mansr.com>

  4.  *

  5.  * This file is part of FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. #include "libavutil/opt.h"

  23. #include "avcodec.h"

  24. #include "internal.h"

  25. #include <x264.h>

  26. #include <float.h>

  27. #include <math.h>

  28. #include <stdio.h>

  29. #include <stdlib.h>

  30. #include <string.h>

  31. 

  32. typedef struct X264Context {

  33.     AVClass        *class;

  34.     x264_param_t    params;

  35.     x264_t         *enc;

  36.     x264_picture_t  pic;

  37.     uint8_t        *sei;

  38.     int             sei_size;

  39.     AVFrame         out_pic;

  40.     char *preset;

  41.     char *tune;

  42.     char *profile;

  43.     char *level;

  44.     int fastfirstpass;

  45.     char *stats;

  46.     char *wpredp;

  47.     char *x264opts;

  48.     float crf;

  49.     float crf_max;

  50.     int cqp;

  51.     int aq_mode;

  52.     float aq_strength;

  53.     char *psy_rd;

  54.     int psy;

  55.     int rc_lookahead;

  56.     int weightp;

  57.     int weightb;

  58.     int ssim;

  59.     int intra_refresh;

  60.     int b_bias;

  61.     int b_pyramid;

  62.     int mixed_refs;

  63.     int dct8x8;

  64.     int fast_pskip;

  65.     int aud;

  66.     int mbtree;

  67.     char *deblock;

  68.     float cplxblur;

  69.     char *partitions;

  70.     int direct_pred;

  71.     int slice_max_size;

  72. } X264Context;

  73. 

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

  75. {

  76.     static const int level_map[] = {

  77.         [X264_LOG_ERROR]   = AV_LOG_ERROR,

  78.         [X264_LOG_WARNING] = AV_LOG_WARNING,

  79.         [X264_LOG_INFO]    = AV_LOG_INFO,

  80.         [X264_LOG_DEBUG]   = AV_LOG_DEBUG

  81.     };

  82. 

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

  84.         return;

  85. 

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

  87. }

  88. 

  89. 

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

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

  92. {

  93.     X264Context *x4 = ctx->priv_data;

  94.     uint8_t *p = buf;

  95.     int i;

  96. 

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

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

  99.         if (x4->sei_size > size) {

  100.             av_log(ctx, AV_LOG_ERROR, "Error: nal buffer is too small\n");

  101.             return -1;

  102.         }

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

  104.         p += x4->sei_size;

  105.         x4->sei_size = 0;

  106.         av_freep(&x4->sei);

  107.     }

  108. 

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

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

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

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

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

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

  115.             continue;

  116.         }

  117.         if (nals[i].i_payload > (size - (p - buf))) {

  118.             // return only complete nals which fit in buf

  119.             av_log(ctx, AV_LOG_ERROR, "Error: nal buffer is too small\n");

  120.             break;

  121.         }

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

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

  124.     }

  125. 

  126.     return p - buf;

  127. }

  128. 

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

  130.                       int orig_bufsize, void *data)

  131. {

  132.     X264Context *x4 = ctx->priv_data;

  133.     AVFrame *frame = data;

  134.     x264_nal_t *nal;

  135.     int nnal, i;

  136.     x264_picture_t pic_out;

  137.     int bufsize;

  138. 

  139.     x264_picture_init( &x4->pic );

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

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

  142. 

  143.     if (frame) {

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

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

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

  147.         }

  148. 

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

  150.         x4->pic.i_type =

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

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

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

  154.                                             X264_TYPE_AUTO;

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

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

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

  158.         }

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

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

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

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

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

  164.         }

  165.     }

  166. 

  167.     do {

  168.         bufsize = orig_bufsize;

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

  170.         return -1;

  171. 

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

  173.     if (bufsize < 0)

  174.         return -1;

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

  176. 

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

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

  179. 

  180.     switch (pic_out.i_type) {

  181.     case X264_TYPE_IDR:

  182.     case X264_TYPE_I:

  183.         x4->out_pic.pict_type = AV_PICTURE_TYPE_I;

  184.         break;

  185.     case X264_TYPE_P:

  186.         x4->out_pic.pict_type = AV_PICTURE_TYPE_P;

  187.         break;

  188.     case X264_TYPE_B:

  189.     case X264_TYPE_BREF:

  190.         x4->out_pic.pict_type = AV_PICTURE_TYPE_B;

  191.         break;

  192.     }

  193. 

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

  195.     if (bufsize)

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

  197. 

  198.     return bufsize;

  199. }

  200. 

  201. static av_cold int X264_close(AVCodecContext *avctx)

  202. {

  203.     X264Context *x4 = avctx->priv_data;

  204. 

  205.     av_freep(&avctx->extradata);

  206.     av_free(x4->sei);

  207. 

  208.     if (x4->enc)

  209.         x264_encoder_close(x4->enc);

  210. 

  211.     return 0;

  212. }

  213. 

  214. #define OPT_STR(opt, param)                                                   \

  215.     do {                                                                      \

  216.         int ret;                                                              \

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

  218.             if(ret == X264_PARAM_BAD_NAME)                                    \

  219.                 av_log(avctx, AV_LOG_ERROR,                                   \

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

  221.             else                                                              \

  222.                 av_log(avctx, AV_LOG_ERROR,                                   \

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

  224.             return -1;                                                        \

  225.         }                                                                     \

  226.     } while (0);

  227. 

  228. #define PARSE_X264_OPT(name, var)\

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

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

  231.         return AVERROR(EINVAL);\

  232.     }

  233. 

  234. static av_cold int X264_init(AVCodecContext *avctx)

  235. {

  236.     X264Context *x4 = avctx->priv_data;

  237. 

  238.     x264_param_default(&x4->params);

  239. 

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

  241. 

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

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

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

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

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

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

  248.             return AVERROR(EINVAL);

  249.         }

  250. 

  251.     if (avctx->level > 0)

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

  253. 

  254.     x4->params.pf_log               = X264_log;

  255.     x4->params.p_log_private        = avctx;

  256.     x4->params.i_log_level          = X264_LOG_DEBUG;

  257. 

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

  259. 

  260.     if (avctx->bit_rate) {

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

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

  263.     }

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

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

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

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

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

  269.     } else {

  270. #if FF_API_X264_GLOBAL_OPTS

  271.         if (avctx->crf) {

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

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

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

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

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

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

  278.         }

  279. #endif

  280. 

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

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

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

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

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

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

  287.         }

  288. 

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

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

  291.     }

  292. 

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

  294. 

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

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

  297.         x4->params.rc.f_vbv_buffer_init =

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

  299.     }

  300. 

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

  302. 

  303.     if(x4->x264opts){

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

  305.         while(p){

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

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

  308.             OPT_STR(param, val);

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

  310.             p+=!!p;

  311.         }

  312.     }

  313. 

  314. #if FF_API_X264_GLOBAL_OPTS

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

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

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

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

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

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

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

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

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

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

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

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

  327.     if (avctx->bframebias)

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

  329.     if (avctx->deblockalpha)

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

  331.     if (avctx->deblockbeta)

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

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

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

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

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

  337.     if (avctx->partitions) {

  338.         if (avctx->partitions & X264_PART_I4X4)

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

  340.         if (avctx->partitions & X264_PART_I8X8)

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

  342.         if (avctx->partitions & X264_PART_P8X8)

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

  344.         if (avctx->partitions & X264_PART_P4X4)

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

  346.         if (avctx->partitions & X264_PART_B8X8)

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

  348.     }

  349.     if (avctx->flags2) {

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

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

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

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

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

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

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

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

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

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

  360.     }

  361. #endif

  362. 

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

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

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

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

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

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

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

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

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

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

  373. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  408. 

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

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

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

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

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

  414.     PARSE_X264_OPT("deblock", deblock);

  415.     PARSE_X264_OPT("partitions", partitions);

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

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

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

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

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

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

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

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

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

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

  426. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  447. 

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

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

  450. 

  451.     if (x4->fastfirstpass)

  452.         x264_param_apply_fastfirstpass(&x4->params);

  453. 

  454.     if (x4->profile)

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

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

  457.             return AVERROR(EINVAL);

  458.         }

  459. 

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

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

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

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

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

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

  466. 

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

  468. 

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

  470. 

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

  472. 

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

  474. 

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

  476. 

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

  478. 

  479.     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)

  480.         x4->params.b_repeat_headers = 0;

  481. 

  482.     // update AVCodecContext with x264 parameters

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

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

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

  486. #if FF_API_X264_GLOBAL_OPTS

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

  488. #endif

  489. 

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

  491.     if (!x4->enc)

  492.         return -1;

  493. 

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

  495. 

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

  497.         x264_nal_t *nal;

  498.         int nnal, s, i;

  499. 

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

  501. 

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

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

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

  505. 

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

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

  508.     }

  509. 

  510.     return 0;

  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),        FF_OPT_TYPE_STRING, { .str = "medium" }, 0, 0, VE},

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

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

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

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

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

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

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

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

  525.     { "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 },

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

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

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

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

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

  531.     { "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},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  548.     { "8x8dct",        "High profile 8x8 transform.",                     OFFSET(dct8x8),        FF_OPT_TYPE_INT,    {-1 }, -1, 1, VE},

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

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

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

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

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

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

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

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

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

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

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

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

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

  562.     { NULL },

  563. };

  564. 

  565. static const AVClass class = {

  566.     .class_name = "libx264",

  567.     .item_name  = av_default_item_name,

  568.     .option     = options,

  569.     .version    = LIBAVUTIL_VERSION_INT,

  570. };

  571. 

  572. static const AVCodecDefault x264_defaults[] = {

  573.     { "b",                "0" },

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

  575.     { "flags2",           "0" },

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  595.     { NULL },

  596. };

  597. 

  598. AVCodec ff_libx264_encoder = {

  599.     .name           = "libx264",

  600.     .type           = AVMEDIA_TYPE_VIDEO,

  601.     .id             = CODEC_ID_H264,

  602.     .priv_data_size = sizeof(X264Context),

  603.     .init           = X264_init,

  604.     .encode         = X264_frame,

  605.     .close          = X264_close,

  606.     .capabilities   = CODEC_CAP_DELAY,

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

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

  609.     .priv_class     = &class,

  610.     .defaults       = x264_defaults,

  611. };