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libavcodec/libx264.c

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00001 /*
00002  * H.264 encoding using the x264 library
00003  * Copyright (C) 2005  Mans Rullgard <mans@mansr.com>
00004  *
00005  * This file is part of Libav.
00006  *
00007  * Libav is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * Libav is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with Libav; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #include "libavutil/opt.h"
00023 #include "libavutil/pixdesc.h"
00024 #include "avcodec.h"
00025 #include "internal.h"
00026 #include <x264.h>
00027 #include <float.h>
00028 #include <math.h>
00029 #include <stdio.h>
00030 #include <stdlib.h>
00031 #include <string.h>
00032 
00033 typedef struct X264Context {
00034     AVClass        *class;
00035     x264_param_t    params;
00036     x264_t         *enc;
00037     x264_picture_t  pic;
00038     uint8_t        *sei;
00039     int             sei_size;
00040     AVFrame         out_pic;
00041     char *preset;
00042     char *tune;
00043     char *profile;
00044     int fastfirstpass;
00045     float crf;
00046     float crf_max;
00047     int cqp;
00048     int aq_mode;
00049     float aq_strength;
00050     char *psy_rd;
00051     int psy;
00052     int rc_lookahead;
00053     int weightp;
00054     int weightb;
00055     int ssim;
00056     int intra_refresh;
00057     int b_bias;
00058     int b_pyramid;
00059     int mixed_refs;
00060     int dct8x8;
00061     int fast_pskip;
00062     int aud;
00063     int mbtree;
00064     char *deblock;
00065     float cplxblur;
00066     char *partitions;
00067     int direct_pred;
00068     int slice_max_size;
00069 } X264Context;
00070 
00071 static void X264_log(void *p, int level, const char *fmt, va_list args)
00072 {
00073     static const int level_map[] = {
00074         [X264_LOG_ERROR]   = AV_LOG_ERROR,
00075         [X264_LOG_WARNING] = AV_LOG_WARNING,
00076         [X264_LOG_INFO]    = AV_LOG_INFO,
00077         [X264_LOG_DEBUG]   = AV_LOG_DEBUG
00078     };
00079 
00080     if (level < 0 || level > X264_LOG_DEBUG)
00081         return;
00082 
00083     av_vlog(p, level_map[level], fmt, args);
00084 }
00085 
00086 
00087 static int encode_nals(AVCodecContext *ctx, uint8_t *buf, int size,
00088                        x264_nal_t *nals, int nnal, int skip_sei)
00089 {
00090     X264Context *x4 = ctx->priv_data;
00091     uint8_t *p = buf;
00092     int i;
00093 
00094     /* Write the SEI as part of the first frame. */
00095     if (x4->sei_size > 0 && nnal > 0) {
00096         memcpy(p, x4->sei, x4->sei_size);
00097         p += x4->sei_size;
00098         x4->sei_size = 0;
00099     }
00100 
00101     for (i = 0; i < nnal; i++){
00102         /* Don't put the SEI in extradata. */
00103         if (skip_sei && nals[i].i_type == NAL_SEI) {
00104             x4->sei_size = nals[i].i_payload;
00105             x4->sei      = av_malloc(x4->sei_size);
00106             memcpy(x4->sei, nals[i].p_payload, nals[i].i_payload);
00107             continue;
00108         }
00109         memcpy(p, nals[i].p_payload, nals[i].i_payload);
00110         p += nals[i].i_payload;
00111     }
00112 
00113     return p - buf;
00114 }
00115 
00116 static int X264_frame(AVCodecContext *ctx, uint8_t *buf,
00117                       int bufsize, void *data)
00118 {
00119     X264Context *x4 = ctx->priv_data;
00120     AVFrame *frame = data;
00121     x264_nal_t *nal;
00122     int nnal, i;
00123     x264_picture_t pic_out;
00124 
00125     x264_picture_init( &x4->pic );
00126     x4->pic.img.i_csp   = x4->params.i_csp;
00127     if (x264_bit_depth > 8)
00128         x4->pic.img.i_csp |= X264_CSP_HIGH_DEPTH;
00129     x4->pic.img.i_plane = 3;
00130 
00131     if (frame) {
00132         for (i = 0; i < 3; i++) {
00133             x4->pic.img.plane[i]    = frame->data[i];
00134             x4->pic.img.i_stride[i] = frame->linesize[i];
00135         }
00136 
00137         x4->pic.i_pts  = frame->pts;
00138         x4->pic.i_type =
00139             frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME :
00140             frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P :
00141             frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B :
00142                                             X264_TYPE_AUTO;
00143         if (x4->params.b_tff != frame->top_field_first) {
00144             x4->params.b_tff = frame->top_field_first;
00145             x264_encoder_reconfig(x4->enc, &x4->params);
00146         }
00147     }
00148 
00149     do {
00150     if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
00151         return -1;
00152 
00153     bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0);
00154     if (bufsize < 0)
00155         return -1;
00156     } while (!bufsize && !frame && x264_encoder_delayed_frames(x4->enc));
00157 
00158     /* FIXME: libx264 now provides DTS, but AVFrame doesn't have a field for it. */
00159     x4->out_pic.pts = pic_out.i_pts;
00160 
00161     switch (pic_out.i_type) {
00162     case X264_TYPE_IDR:
00163     case X264_TYPE_I:
00164         x4->out_pic.pict_type = AV_PICTURE_TYPE_I;
00165         break;
00166     case X264_TYPE_P:
00167         x4->out_pic.pict_type = AV_PICTURE_TYPE_P;
00168         break;
00169     case X264_TYPE_B:
00170     case X264_TYPE_BREF:
00171         x4->out_pic.pict_type = AV_PICTURE_TYPE_B;
00172         break;
00173     }
00174 
00175     x4->out_pic.key_frame = pic_out.b_keyframe;
00176     if (bufsize)
00177         x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
00178 
00179     return bufsize;
00180 }
00181 
00182 static av_cold int X264_close(AVCodecContext *avctx)
00183 {
00184     X264Context *x4 = avctx->priv_data;
00185 
00186     av_freep(&avctx->extradata);
00187     av_free(x4->sei);
00188 
00189     if (x4->enc)
00190         x264_encoder_close(x4->enc);
00191 
00192     return 0;
00193 }
00194 
00195 static int convert_pix_fmt(enum PixelFormat pix_fmt)
00196 {
00197     switch (pix_fmt) {
00198     case PIX_FMT_YUV420P:
00199     case PIX_FMT_YUVJ420P:
00200     case PIX_FMT_YUV420P9:
00201     case PIX_FMT_YUV420P10: return X264_CSP_I420;
00202     case PIX_FMT_YUV422P:
00203     case PIX_FMT_YUV422P10: return X264_CSP_I422;
00204     case PIX_FMT_YUV444P:
00205     case PIX_FMT_YUV444P9:
00206     case PIX_FMT_YUV444P10: return X264_CSP_I444;
00207     };
00208     return 0;
00209 }
00210 
00211 #define PARSE_X264_OPT(name, var)\
00212     if (x4->var && x264_param_parse(&x4->params, name, x4->var) < 0) {\
00213         av_log(avctx, AV_LOG_ERROR, "Error parsing option '%s' with value '%s'.\n", name, x4->var);\
00214         return AVERROR(EINVAL);\
00215     }
00216 
00217 static av_cold int X264_init(AVCodecContext *avctx)
00218 {
00219     X264Context *x4 = avctx->priv_data;
00220 
00221     x264_param_default(&x4->params);
00222 
00223     x4->params.b_deblocking_filter         = avctx->flags & CODEC_FLAG_LOOP_FILTER;
00224 
00225     if (x4->preset || x4->tune)
00226         if (x264_param_default_preset(&x4->params, x4->preset, x4->tune) < 0) {
00227             av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", x4->preset, x4->tune);
00228             return AVERROR(EINVAL);
00229         }
00230 
00231     if (avctx->level > 0)
00232         x4->params.i_level_idc = avctx->level;
00233 
00234     x4->params.pf_log               = X264_log;
00235     x4->params.p_log_private        = avctx;
00236     x4->params.i_log_level          = X264_LOG_DEBUG;
00237     x4->params.i_csp                = convert_pix_fmt(avctx->pix_fmt);
00238 
00239     if (avctx->bit_rate) {
00240         x4->params.rc.i_bitrate   = avctx->bit_rate / 1000;
00241         x4->params.rc.i_rc_method = X264_RC_ABR;
00242     }
00243     x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
00244     x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate    / 1000;
00245     x4->params.rc.b_stat_write      = avctx->flags & CODEC_FLAG_PASS1;
00246     if (avctx->flags & CODEC_FLAG_PASS2) {
00247         x4->params.rc.b_stat_read = 1;
00248     } else {
00249 #if FF_API_X264_GLOBAL_OPTS
00250         if (avctx->crf) {
00251             x4->params.rc.i_rc_method   = X264_RC_CRF;
00252             x4->params.rc.f_rf_constant = avctx->crf;
00253             x4->params.rc.f_rf_constant_max = avctx->crf_max;
00254         } else if (avctx->cqp > -1) {
00255             x4->params.rc.i_rc_method   = X264_RC_CQP;
00256             x4->params.rc.i_qp_constant = avctx->cqp;
00257         }
00258 #endif
00259 
00260         if (x4->crf >= 0) {
00261             x4->params.rc.i_rc_method   = X264_RC_CRF;
00262             x4->params.rc.f_rf_constant = x4->crf;
00263         } else if (x4->cqp >= 0) {
00264             x4->params.rc.i_rc_method   = X264_RC_CQP;
00265             x4->params.rc.i_qp_constant = x4->cqp;
00266         }
00267 
00268         if (x4->crf_max >= 0)
00269             x4->params.rc.f_rf_constant_max = x4->crf_max;
00270     }
00271 
00272     if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy &&
00273         (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
00274         x4->params.rc.f_vbv_buffer_init =
00275             (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
00276     }
00277 
00278     x4->params.rc.f_ip_factor             = 1 / fabs(avctx->i_quant_factor);
00279     x4->params.rc.f_pb_factor             = avctx->b_quant_factor;
00280     x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
00281 
00282 #if FF_API_X264_GLOBAL_OPTS
00283     if (avctx->aq_mode >= 0)
00284         x4->params.rc.i_aq_mode = avctx->aq_mode;
00285     if (avctx->aq_strength >= 0)
00286         x4->params.rc.f_aq_strength = avctx->aq_strength;
00287     if (avctx->psy_rd >= 0)
00288         x4->params.analyse.f_psy_rd           = avctx->psy_rd;
00289     if (avctx->psy_trellis >= 0)
00290         x4->params.analyse.f_psy_trellis      = avctx->psy_trellis;
00291     if (avctx->rc_lookahead >= 0)
00292         x4->params.rc.i_lookahead             = avctx->rc_lookahead;
00293     if (avctx->weighted_p_pred >= 0)
00294         x4->params.analyse.i_weighted_pred    = avctx->weighted_p_pred;
00295     if (avctx->bframebias)
00296         x4->params.i_bframe_bias              = avctx->bframebias;
00297     if (avctx->deblockalpha)
00298         x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
00299     if (avctx->deblockbeta)
00300         x4->params.i_deblocking_filter_beta    = avctx->deblockbeta;
00301     if (avctx->complexityblur >= 0)
00302         x4->params.rc.f_complexity_blur        = avctx->complexityblur;
00303     if (avctx->directpred >= 0)
00304         x4->params.analyse.i_direct_mv_pred    = avctx->directpred;
00305     if (avctx->partitions) {
00306         if (avctx->partitions & X264_PART_I4X4)
00307             x4->params.analyse.inter |= X264_ANALYSE_I4x4;
00308         if (avctx->partitions & X264_PART_I8X8)
00309             x4->params.analyse.inter |= X264_ANALYSE_I8x8;
00310         if (avctx->partitions & X264_PART_P8X8)
00311             x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16;
00312         if (avctx->partitions & X264_PART_P4X4)
00313             x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8;
00314         if (avctx->partitions & X264_PART_B8X8)
00315             x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16;
00316     }
00317     x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM;
00318     x4->params.b_intra_refresh = avctx->flags2 & CODEC_FLAG2_INTRA_REFRESH;
00319     x4->params.i_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE;
00320     x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;
00321     x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS;
00322     x4->params.analyse.b_transform_8x8    = avctx->flags2 & CODEC_FLAG2_8X8DCT;
00323     x4->params.analyse.b_fast_pskip       = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;
00324     x4->params.b_aud                      = avctx->flags2 & CODEC_FLAG2_AUD;
00325     x4->params.analyse.b_psy              = avctx->flags2 & CODEC_FLAG2_PSY;
00326     x4->params.rc.b_mb_tree               = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);
00327 #endif
00328 
00329     if (avctx->me_method == ME_EPZS)
00330         x4->params.analyse.i_me_method = X264_ME_DIA;
00331     else if (avctx->me_method == ME_HEX)
00332         x4->params.analyse.i_me_method = X264_ME_HEX;
00333     else if (avctx->me_method == ME_UMH)
00334         x4->params.analyse.i_me_method = X264_ME_UMH;
00335     else if (avctx->me_method == ME_FULL)
00336         x4->params.analyse.i_me_method = X264_ME_ESA;
00337     else if (avctx->me_method == ME_TESA)
00338         x4->params.analyse.i_me_method = X264_ME_TESA;
00339 
00340     if (avctx->gop_size >= 0)
00341         x4->params.i_keyint_max         = avctx->gop_size;
00342     if (avctx->max_b_frames >= 0)
00343         x4->params.i_bframe             = avctx->max_b_frames;
00344     if (avctx->scenechange_threshold >= 0)
00345         x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
00346     if (avctx->qmin >= 0)
00347         x4->params.rc.i_qp_min          = avctx->qmin;
00348     if (avctx->qmax >= 0)
00349         x4->params.rc.i_qp_max          = avctx->qmax;
00350     if (avctx->max_qdiff >= 0)
00351         x4->params.rc.i_qp_step         = avctx->max_qdiff;
00352     if (avctx->qblur >= 0)
00353         x4->params.rc.f_qblur           = avctx->qblur;     /* temporally blur quants */
00354     if (avctx->qcompress >= 0)
00355         x4->params.rc.f_qcompress       = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
00356     if (avctx->refs >= 0)
00357         x4->params.i_frame_reference    = avctx->refs;
00358     if (avctx->trellis >= 0)
00359         x4->params.analyse.i_trellis    = avctx->trellis;
00360     if (avctx->me_range >= 0)
00361         x4->params.analyse.i_me_range   = avctx->me_range;
00362     if (avctx->noise_reduction >= 0)
00363         x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
00364     if (avctx->me_subpel_quality >= 0)
00365         x4->params.analyse.i_subpel_refine   = avctx->me_subpel_quality;
00366     if (avctx->b_frame_strategy >= 0)
00367         x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
00368     if (avctx->keyint_min >= 0)
00369         x4->params.i_keyint_min = avctx->keyint_min;
00370     if (avctx->coder_type >= 0)
00371         x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
00372     if (avctx->me_cmp >= 0)
00373         x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
00374 
00375     if (x4->aq_mode >= 0)
00376         x4->params.rc.i_aq_mode = x4->aq_mode;
00377     if (x4->aq_strength >= 0)
00378         x4->params.rc.f_aq_strength = x4->aq_strength;
00379     PARSE_X264_OPT("psy-rd", psy_rd);
00380     PARSE_X264_OPT("deblock", deblock);
00381     PARSE_X264_OPT("partitions", partitions);
00382     if (x4->psy >= 0)
00383         x4->params.analyse.b_psy  = x4->psy;
00384     if (x4->rc_lookahead >= 0)
00385         x4->params.rc.i_lookahead = x4->rc_lookahead;
00386     if (x4->weightp >= 0)
00387         x4->params.analyse.i_weighted_pred = x4->weightp;
00388     if (x4->weightb >= 0)
00389         x4->params.analyse.b_weighted_bipred = x4->weightb;
00390     if (x4->cplxblur >= 0)
00391         x4->params.rc.f_complexity_blur = x4->cplxblur;
00392 
00393     if (x4->ssim >= 0)
00394         x4->params.analyse.b_ssim = x4->ssim;
00395     if (x4->intra_refresh >= 0)
00396         x4->params.b_intra_refresh = x4->intra_refresh;
00397     if (x4->b_bias != INT_MIN)
00398         x4->params.i_bframe_bias              = x4->b_bias;
00399     if (x4->b_pyramid >= 0)
00400         x4->params.i_bframe_pyramid = x4->b_pyramid;
00401     if (x4->mixed_refs >= 0)
00402         x4->params.analyse.b_mixed_references = x4->mixed_refs;
00403     if (x4->dct8x8 >= 0)
00404         x4->params.analyse.b_transform_8x8    = x4->dct8x8;
00405     if (x4->fast_pskip >= 0)
00406         x4->params.analyse.b_fast_pskip       = x4->fast_pskip;
00407     if (x4->aud >= 0)
00408         x4->params.b_aud                      = x4->aud;
00409     if (x4->mbtree >= 0)
00410         x4->params.rc.b_mb_tree               = x4->mbtree;
00411     if (x4->direct_pred >= 0)
00412         x4->params.analyse.i_direct_mv_pred   = x4->direct_pred;
00413 
00414     if (x4->slice_max_size >= 0)
00415         x4->params.i_slice_max_size =  x4->slice_max_size;
00416 
00417     if (x4->fastfirstpass)
00418         x264_param_apply_fastfirstpass(&x4->params);
00419 
00420     if (x4->profile)
00421         if (x264_param_apply_profile(&x4->params, x4->profile) < 0) {
00422             av_log(avctx, AV_LOG_ERROR, "Error setting profile %s.\n", x4->profile);
00423             return AVERROR(EINVAL);
00424         }
00425 
00426     x4->params.i_width          = avctx->width;
00427     x4->params.i_height         = avctx->height;
00428     x4->params.vui.i_sar_width  = avctx->sample_aspect_ratio.num;
00429     x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
00430     x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den;
00431     x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num;
00432 
00433     x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
00434 
00435     x4->params.i_threads      = avctx->thread_count;
00436 
00437     x4->params.b_interlaced   = avctx->flags & CODEC_FLAG_INTERLACED_DCT;
00438 
00439     x4->params.b_open_gop     = !(avctx->flags & CODEC_FLAG_CLOSED_GOP);
00440 
00441     x4->params.i_slice_count  = avctx->slices;
00442 
00443     x4->params.vui.b_fullrange = avctx->pix_fmt == PIX_FMT_YUVJ420P;
00444 
00445     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
00446         x4->params.b_repeat_headers = 0;
00447 
00448     // update AVCodecContext with x264 parameters
00449     avctx->has_b_frames = x4->params.i_bframe ?
00450         x4->params.i_bframe_pyramid ? 2 : 1 : 0;
00451     if (avctx->max_b_frames < 0)
00452         avctx->max_b_frames = 0;
00453 
00454     avctx->bit_rate = x4->params.rc.i_bitrate*1000;
00455 #if FF_API_X264_GLOBAL_OPTS
00456     avctx->crf = x4->params.rc.f_rf_constant;
00457 #endif
00458 
00459     x4->enc = x264_encoder_open(&x4->params);
00460     if (!x4->enc)
00461         return -1;
00462 
00463     avctx->coded_frame = &x4->out_pic;
00464 
00465     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
00466         x264_nal_t *nal;
00467         int nnal, s, i;
00468 
00469         s = x264_encoder_headers(x4->enc, &nal, &nnal);
00470 
00471         for (i = 0; i < nnal; i++)
00472             if (nal[i].i_type == NAL_SEI)
00473                 av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25);
00474 
00475         avctx->extradata      = av_malloc(s);
00476         avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1);
00477     }
00478 
00479     return 0;
00480 }
00481 
00482 static const enum PixelFormat pix_fmts_8bit[] = {
00483     PIX_FMT_YUV420P,
00484     PIX_FMT_YUVJ420P,
00485     PIX_FMT_YUV422P,
00486     PIX_FMT_YUV444P,
00487     PIX_FMT_NONE
00488 };
00489 static const enum PixelFormat pix_fmts_9bit[] = {
00490     PIX_FMT_YUV420P9,
00491     PIX_FMT_YUV444P9,
00492     PIX_FMT_NONE
00493 };
00494 static const enum PixelFormat pix_fmts_10bit[] = {
00495     PIX_FMT_YUV420P10,
00496     PIX_FMT_YUV422P10,
00497     PIX_FMT_YUV444P10,
00498     PIX_FMT_NONE
00499 };
00500 
00501 static av_cold void X264_init_static(AVCodec *codec)
00502 {
00503     if (x264_bit_depth == 8)
00504         codec->pix_fmts = pix_fmts_8bit;
00505     else if (x264_bit_depth == 9)
00506         codec->pix_fmts = pix_fmts_9bit;
00507     else if (x264_bit_depth == 10)
00508         codec->pix_fmts = pix_fmts_10bit;
00509 }
00510 
00511 #define OFFSET(x) offsetof(X264Context, x)
00512 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
00513 static const AVOption options[] = {
00514     { "preset",        "Set the encoding preset (cf. x264 --fullhelp)",   OFFSET(preset),        AV_OPT_TYPE_STRING, { .str = "medium" }, 0, 0, VE},
00515     { "tune",          "Tune the encoding params (cf. x264 --fullhelp)",  OFFSET(tune),          AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
00516     { "profile",       "Set profile restrictions (cf. x264 --fullhelp) ", OFFSET(profile),       AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
00517     { "fastfirstpass", "Use fast settings when encoding first pass",      OFFSET(fastfirstpass), AV_OPT_TYPE_INT,    { 1 }, 0, 1, VE},
00518     { "crf",           "Select the quality for constant quality mode",    OFFSET(crf),           AV_OPT_TYPE_FLOAT,  {-1 }, -1, FLT_MAX, VE },
00519     { "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 },
00520     { "qp",            "Constant quantization parameter rate control method",OFFSET(cqp),        AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE },
00521     { "aq-mode",       "AQ method",                                       OFFSET(aq_mode),       AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE, "aq_mode"},
00522     { "none",          NULL,                              0, AV_OPT_TYPE_CONST, {X264_AQ_NONE},         INT_MIN, INT_MAX, VE, "aq_mode" },
00523     { "variance",      "Variance AQ (complexity mask)",   0, AV_OPT_TYPE_CONST, {X264_AQ_VARIANCE},     INT_MIN, INT_MAX, VE, "aq_mode" },
00524     { "autovariance",  "Auto-variance AQ (experimental)", 0, AV_OPT_TYPE_CONST, {X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
00525     { "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},
00526     { "psy",           "Use psychovisual optimizations.",                 OFFSET(psy),           AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE },
00527     { "psy-rd",        "Strength of psychovisual optimization, in <psy-rd>:<psy-trellis> format.", OFFSET(psy_rd), AV_OPT_TYPE_STRING,  {0 }, 0, 0, VE},
00528     { "rc-lookahead",  "Number of frames to look ahead for frametype and ratecontrol", OFFSET(rc_lookahead), AV_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
00529     { "weightb",       "Weighted prediction for B-frames.",               OFFSET(weightb),       AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE },
00530     { "weightp",       "Weighted prediction analysis method.",            OFFSET(weightp),       AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE, "weightp" },
00531     { "none",          NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_NONE},   INT_MIN, INT_MAX, VE, "weightp" },
00532     { "simple",        NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },
00533     { "smart",         NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_SMART},  INT_MIN, INT_MAX, VE, "weightp" },
00534     { "ssim",          "Calculate and print SSIM stats.",                 OFFSET(ssim),          AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE },
00535     { "intra-refresh", "Use Periodic Intra Refresh instead of IDR frames.",OFFSET(intra_refresh),AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE },
00536     { "b-bias",        "Influences how often B-frames are used",          OFFSET(b_bias),        AV_OPT_TYPE_INT,    {INT_MIN}, INT_MIN, INT_MAX, VE },
00537     { "b-pyramid",     "Keep some B-frames as references.",               OFFSET(b_pyramid),     AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE, "b_pyramid" },
00538     { "none",          NULL,                                  0, AV_OPT_TYPE_CONST, {X264_B_PYRAMID_NONE},   INT_MIN, INT_MAX, VE, "b_pyramid" },
00539     { "strict",        "Strictly hierarchical pyramid",       0, AV_OPT_TYPE_CONST, {X264_B_PYRAMID_STRICT}, INT_MIN, INT_MAX, VE, "b_pyramid" },
00540     { "normal",        "Non-strict (not Blu-ray compatible)", 0, AV_OPT_TYPE_CONST, {X264_B_PYRAMID_NORMAL}, INT_MIN, INT_MAX, VE, "b_pyramid" },
00541     { "mixed-refs",    "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), AV_OPT_TYPE_INT, {-1}, -1, 1, VE },
00542     { "8x8dct",        "High profile 8x8 transform.",                     OFFSET(dct8x8),        AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE},
00543     { "fast-pskip",    NULL,                                              OFFSET(fast_pskip),    AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE},
00544     { "aud",           "Use access unit delimiters.",                     OFFSET(aud),           AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE},
00545     { "mbtree",        "Use macroblock tree ratecontrol.",                OFFSET(mbtree),        AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE},
00546     { "deblock",       "Loop filter parameters, in <alpha:beta> form.",   OFFSET(deblock),       AV_OPT_TYPE_STRING, { 0 },  0, 0, VE},
00547     { "cplxblur",      "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), AV_OPT_TYPE_FLOAT,  {-1 }, -1, FLT_MAX, VE},
00548     { "partitions",    "A comma-separated list of partitions to consider. "
00549                        "Possible values: p8x8, p4x4, b8x8, i8x8, i4x4, none, all", OFFSET(partitions), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
00550     { "direct-pred",   "Direct MV prediction mode",                       OFFSET(direct_pred),   AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE, "direct-pred" },
00551     { "none",          NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_NONE },     0, 0, VE, "direct-pred" },
00552     { "spatial",       NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_SPATIAL },  0, 0, VE, "direct-pred" },
00553     { "temporal",      NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },
00554     { "auto",          NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_AUTO },     0, 0, VE, "direct-pred" },
00555     { "slice-max-size","Constant quantization parameter rate control method",OFFSET(slice_max_size),        AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE },
00556     { NULL },
00557 };
00558 
00559 static const AVClass class = {
00560     .class_name = "libx264",
00561     .item_name  = av_default_item_name,
00562     .option     = options,
00563     .version    = LIBAVUTIL_VERSION_INT,
00564 };
00565 
00566 static const AVCodecDefault x264_defaults[] = {
00567     { "b",                "0" },
00568     { "bf",               "-1" },
00569     { "g",                "-1" },
00570     { "qmin",             "-1" },
00571     { "qmax",             "-1" },
00572     { "qdiff",            "-1" },
00573     { "qblur",            "-1" },
00574     { "qcomp",            "-1" },
00575     { "refs",             "-1" },
00576     { "sc_threshold",     "-1" },
00577     { "trellis",          "-1" },
00578     { "nr",               "-1" },
00579     { "me_range",         "-1" },
00580     { "me_method",        "-1" },
00581     { "subq",             "-1" },
00582     { "b_strategy",       "-1" },
00583     { "keyint_min",       "-1" },
00584     { "coder",            "-1" },
00585     { "cmp",              "-1" },
00586     { "threads",          AV_STRINGIFY(X264_THREADS_AUTO) },
00587     { NULL },
00588 };
00589 
00590 AVCodec ff_libx264_encoder = {
00591     .name           = "libx264",
00592     .type           = AVMEDIA_TYPE_VIDEO,
00593     .id             = CODEC_ID_H264,
00594     .priv_data_size = sizeof(X264Context),
00595     .init           = X264_init,
00596     .encode         = X264_frame,
00597     .close          = X264_close,
00598     .capabilities   = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,
00599     .long_name      = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
00600     .priv_class     = &class,
00601     .defaults       = x264_defaults,
00602     .init_static_data = X264_init_static,
00603 };
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