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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     char *stats;
00070 } X264Context;
00071 
00072 static void X264_log(void *p, int level, const char *fmt, va_list args)
00073 {
00074     static const int level_map[] = {
00075         [X264_LOG_ERROR]   = AV_LOG_ERROR,
00076         [X264_LOG_WARNING] = AV_LOG_WARNING,
00077         [X264_LOG_INFO]    = AV_LOG_INFO,
00078         [X264_LOG_DEBUG]   = AV_LOG_DEBUG
00079     };
00080 
00081     if (level < 0 || level > X264_LOG_DEBUG)
00082         return;
00083 
00084     av_vlog(p, level_map[level], fmt, args);
00085 }
00086 
00087 
00088 static int encode_nals(AVCodecContext *ctx, uint8_t *buf, int size,
00089                        x264_nal_t *nals, int nnal, int skip_sei)
00090 {
00091     X264Context *x4 = ctx->priv_data;
00092     uint8_t *p = buf;
00093     int i;
00094 
00095     /* Write the SEI as part of the first frame. */
00096     if (x4->sei_size > 0 && nnal > 0) {
00097         memcpy(p, x4->sei, x4->sei_size);
00098         p += x4->sei_size;
00099         x4->sei_size = 0;
00100     }
00101 
00102     for (i = 0; i < nnal; i++){
00103         /* Don't put the SEI in extradata. */
00104         if (skip_sei && nals[i].i_type == NAL_SEI) {
00105             x4->sei_size = nals[i].i_payload;
00106             x4->sei      = av_malloc(x4->sei_size);
00107             memcpy(x4->sei, nals[i].p_payload, nals[i].i_payload);
00108             continue;
00109         }
00110         memcpy(p, nals[i].p_payload, nals[i].i_payload);
00111         p += nals[i].i_payload;
00112     }
00113 
00114     return p - buf;
00115 }
00116 
00117 static int X264_frame(AVCodecContext *ctx, uint8_t *buf,
00118                       int bufsize, void *data)
00119 {
00120     X264Context *x4 = ctx->priv_data;
00121     AVFrame *frame = data;
00122     x264_nal_t *nal;
00123     int nnal, i;
00124     x264_picture_t pic_out;
00125 
00126     x264_picture_init( &x4->pic );
00127     x4->pic.img.i_csp   = x4->params.i_csp;
00128     if (x264_bit_depth > 8)
00129         x4->pic.img.i_csp |= X264_CSP_HIGH_DEPTH;
00130     x4->pic.img.i_plane = 3;
00131 
00132     if (frame) {
00133         for (i = 0; i < 3; i++) {
00134             x4->pic.img.plane[i]    = frame->data[i];
00135             x4->pic.img.i_stride[i] = frame->linesize[i];
00136         }
00137 
00138         x4->pic.i_pts  = frame->pts;
00139         x4->pic.i_type =
00140             frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME :
00141             frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P :
00142             frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B :
00143                                             X264_TYPE_AUTO;
00144         if (x4->params.b_tff != frame->top_field_first) {
00145             x4->params.b_tff = frame->top_field_first;
00146             x264_encoder_reconfig(x4->enc, &x4->params);
00147         }
00148     }
00149 
00150     do {
00151     if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
00152         return -1;
00153 
00154     bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0);
00155     if (bufsize < 0)
00156         return -1;
00157     } while (!bufsize && !frame && x264_encoder_delayed_frames(x4->enc));
00158 
00159     /* FIXME: libx264 now provides DTS, but AVFrame doesn't have a field for it. */
00160     x4->out_pic.pts = pic_out.i_pts;
00161 
00162     switch (pic_out.i_type) {
00163     case X264_TYPE_IDR:
00164     case X264_TYPE_I:
00165         x4->out_pic.pict_type = AV_PICTURE_TYPE_I;
00166         break;
00167     case X264_TYPE_P:
00168         x4->out_pic.pict_type = AV_PICTURE_TYPE_P;
00169         break;
00170     case X264_TYPE_B:
00171     case X264_TYPE_BREF:
00172         x4->out_pic.pict_type = AV_PICTURE_TYPE_B;
00173         break;
00174     }
00175 
00176     x4->out_pic.key_frame = pic_out.b_keyframe;
00177     if (bufsize)
00178         x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
00179 
00180     return bufsize;
00181 }
00182 
00183 static av_cold int X264_close(AVCodecContext *avctx)
00184 {
00185     X264Context *x4 = avctx->priv_data;
00186 
00187     av_freep(&avctx->extradata);
00188     av_free(x4->sei);
00189 
00190     if (x4->enc)
00191         x264_encoder_close(x4->enc);
00192 
00193     return 0;
00194 }
00195 
00196 static int convert_pix_fmt(enum PixelFormat pix_fmt)
00197 {
00198     switch (pix_fmt) {
00199     case PIX_FMT_YUV420P:
00200     case PIX_FMT_YUVJ420P:
00201     case PIX_FMT_YUV420P9:
00202     case PIX_FMT_YUV420P10: return X264_CSP_I420;
00203     case PIX_FMT_YUV422P:
00204     case PIX_FMT_YUV422P10: return X264_CSP_I422;
00205     case PIX_FMT_YUV444P:
00206     case PIX_FMT_YUV444P9:
00207     case PIX_FMT_YUV444P10: return X264_CSP_I444;
00208     };
00209     return 0;
00210 }
00211 
00212 #define PARSE_X264_OPT(name, var)\
00213     if (x4->var && x264_param_parse(&x4->params, name, x4->var) < 0) {\
00214         av_log(avctx, AV_LOG_ERROR, "Error parsing option '%s' with value '%s'.\n", name, x4->var);\
00215         return AVERROR(EINVAL);\
00216     }
00217 
00218 static av_cold int X264_init(AVCodecContext *avctx)
00219 {
00220     X264Context *x4 = avctx->priv_data;
00221 
00222     x264_param_default(&x4->params);
00223 
00224     x4->params.b_deblocking_filter         = avctx->flags & CODEC_FLAG_LOOP_FILTER;
00225 
00226     if (x4->preset || x4->tune)
00227         if (x264_param_default_preset(&x4->params, x4->preset, x4->tune) < 0) {
00228             av_log(avctx, AV_LOG_ERROR, "Error setting preset/tune %s/%s.\n", x4->preset, x4->tune);
00229             return AVERROR(EINVAL);
00230         }
00231 
00232     if (avctx->level > 0)
00233         x4->params.i_level_idc = avctx->level;
00234 
00235     x4->params.pf_log               = X264_log;
00236     x4->params.p_log_private        = avctx;
00237     x4->params.i_log_level          = X264_LOG_DEBUG;
00238     x4->params.i_csp                = convert_pix_fmt(avctx->pix_fmt);
00239 
00240     if (avctx->bit_rate) {
00241         x4->params.rc.i_bitrate   = avctx->bit_rate / 1000;
00242         x4->params.rc.i_rc_method = X264_RC_ABR;
00243     }
00244     x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
00245     x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate    / 1000;
00246     x4->params.rc.b_stat_write      = avctx->flags & CODEC_FLAG_PASS1;
00247     if (avctx->flags & CODEC_FLAG_PASS2) {
00248         x4->params.rc.b_stat_read = 1;
00249     } else {
00250 #if FF_API_X264_GLOBAL_OPTS
00251         if (avctx->crf) {
00252             x4->params.rc.i_rc_method   = X264_RC_CRF;
00253             x4->params.rc.f_rf_constant = avctx->crf;
00254             x4->params.rc.f_rf_constant_max = avctx->crf_max;
00255         } else if (avctx->cqp > -1) {
00256             x4->params.rc.i_rc_method   = X264_RC_CQP;
00257             x4->params.rc.i_qp_constant = avctx->cqp;
00258         }
00259 #endif
00260 
00261         if (x4->crf >= 0) {
00262             x4->params.rc.i_rc_method   = X264_RC_CRF;
00263             x4->params.rc.f_rf_constant = x4->crf;
00264         } else if (x4->cqp >= 0) {
00265             x4->params.rc.i_rc_method   = X264_RC_CQP;
00266             x4->params.rc.i_qp_constant = x4->cqp;
00267         }
00268 
00269         if (x4->crf_max >= 0)
00270             x4->params.rc.f_rf_constant_max = x4->crf_max;
00271     }
00272 
00273     if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy &&
00274         (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
00275         x4->params.rc.f_vbv_buffer_init =
00276             (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
00277     }
00278 
00279     x4->params.rc.f_ip_factor             = 1 / fabs(avctx->i_quant_factor);
00280     x4->params.rc.f_pb_factor             = avctx->b_quant_factor;
00281     x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
00282 
00283 #if FF_API_X264_GLOBAL_OPTS
00284     if (avctx->aq_mode >= 0)
00285         x4->params.rc.i_aq_mode = avctx->aq_mode;
00286     if (avctx->aq_strength >= 0)
00287         x4->params.rc.f_aq_strength = avctx->aq_strength;
00288     if (avctx->psy_rd >= 0)
00289         x4->params.analyse.f_psy_rd           = avctx->psy_rd;
00290     if (avctx->psy_trellis >= 0)
00291         x4->params.analyse.f_psy_trellis      = avctx->psy_trellis;
00292     if (avctx->rc_lookahead >= 0)
00293         x4->params.rc.i_lookahead             = avctx->rc_lookahead;
00294     if (avctx->weighted_p_pred >= 0)
00295         x4->params.analyse.i_weighted_pred    = avctx->weighted_p_pred;
00296     if (avctx->bframebias)
00297         x4->params.i_bframe_bias              = avctx->bframebias;
00298     if (avctx->deblockalpha)
00299         x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
00300     if (avctx->deblockbeta)
00301         x4->params.i_deblocking_filter_beta    = avctx->deblockbeta;
00302     if (avctx->complexityblur >= 0)
00303         x4->params.rc.f_complexity_blur        = avctx->complexityblur;
00304     if (avctx->directpred >= 0)
00305         x4->params.analyse.i_direct_mv_pred    = avctx->directpred;
00306     if (avctx->partitions) {
00307         if (avctx->partitions & X264_PART_I4X4)
00308             x4->params.analyse.inter |= X264_ANALYSE_I4x4;
00309         if (avctx->partitions & X264_PART_I8X8)
00310             x4->params.analyse.inter |= X264_ANALYSE_I8x8;
00311         if (avctx->partitions & X264_PART_P8X8)
00312             x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16;
00313         if (avctx->partitions & X264_PART_P4X4)
00314             x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8;
00315         if (avctx->partitions & X264_PART_B8X8)
00316             x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16;
00317     }
00318     x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM;
00319     x4->params.b_intra_refresh = avctx->flags2 & CODEC_FLAG2_INTRA_REFRESH;
00320     x4->params.i_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE;
00321     x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED;
00322     x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS;
00323     x4->params.analyse.b_transform_8x8    = avctx->flags2 & CODEC_FLAG2_8X8DCT;
00324     x4->params.analyse.b_fast_pskip       = avctx->flags2 & CODEC_FLAG2_FASTPSKIP;
00325     x4->params.b_aud                      = avctx->flags2 & CODEC_FLAG2_AUD;
00326     x4->params.analyse.b_psy              = avctx->flags2 & CODEC_FLAG2_PSY;
00327     x4->params.rc.b_mb_tree               = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);
00328 #endif
00329 
00330     if (avctx->me_method == ME_EPZS)
00331         x4->params.analyse.i_me_method = X264_ME_DIA;
00332     else if (avctx->me_method == ME_HEX)
00333         x4->params.analyse.i_me_method = X264_ME_HEX;
00334     else if (avctx->me_method == ME_UMH)
00335         x4->params.analyse.i_me_method = X264_ME_UMH;
00336     else if (avctx->me_method == ME_FULL)
00337         x4->params.analyse.i_me_method = X264_ME_ESA;
00338     else if (avctx->me_method == ME_TESA)
00339         x4->params.analyse.i_me_method = X264_ME_TESA;
00340 
00341     if (avctx->gop_size >= 0)
00342         x4->params.i_keyint_max         = avctx->gop_size;
00343     if (avctx->max_b_frames >= 0)
00344         x4->params.i_bframe             = avctx->max_b_frames;
00345     if (avctx->scenechange_threshold >= 0)
00346         x4->params.i_scenecut_threshold = avctx->scenechange_threshold;
00347     if (avctx->qmin >= 0)
00348         x4->params.rc.i_qp_min          = avctx->qmin;
00349     if (avctx->qmax >= 0)
00350         x4->params.rc.i_qp_max          = avctx->qmax;
00351     if (avctx->max_qdiff >= 0)
00352         x4->params.rc.i_qp_step         = avctx->max_qdiff;
00353     if (avctx->qblur >= 0)
00354         x4->params.rc.f_qblur           = avctx->qblur;     /* temporally blur quants */
00355     if (avctx->qcompress >= 0)
00356         x4->params.rc.f_qcompress       = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
00357     if (avctx->refs >= 0)
00358         x4->params.i_frame_reference    = avctx->refs;
00359     if (avctx->trellis >= 0)
00360         x4->params.analyse.i_trellis    = avctx->trellis;
00361     if (avctx->me_range >= 0)
00362         x4->params.analyse.i_me_range   = avctx->me_range;
00363     if (avctx->noise_reduction >= 0)
00364         x4->params.analyse.i_noise_reduction = avctx->noise_reduction;
00365     if (avctx->me_subpel_quality >= 0)
00366         x4->params.analyse.i_subpel_refine   = avctx->me_subpel_quality;
00367     if (avctx->b_frame_strategy >= 0)
00368         x4->params.i_bframe_adaptive = avctx->b_frame_strategy;
00369     if (avctx->keyint_min >= 0)
00370         x4->params.i_keyint_min = avctx->keyint_min;
00371     if (avctx->coder_type >= 0)
00372         x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
00373     if (avctx->me_cmp >= 0)
00374         x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA;
00375 
00376     if (x4->aq_mode >= 0)
00377         x4->params.rc.i_aq_mode = x4->aq_mode;
00378     if (x4->aq_strength >= 0)
00379         x4->params.rc.f_aq_strength = x4->aq_strength;
00380     PARSE_X264_OPT("psy-rd", psy_rd);
00381     PARSE_X264_OPT("deblock", deblock);
00382     PARSE_X264_OPT("partitions", partitions);
00383     PARSE_X264_OPT("stats", stats);
00384     if (x4->psy >= 0)
00385         x4->params.analyse.b_psy  = x4->psy;
00386     if (x4->rc_lookahead >= 0)
00387         x4->params.rc.i_lookahead = x4->rc_lookahead;
00388     if (x4->weightp >= 0)
00389         x4->params.analyse.i_weighted_pred = x4->weightp;
00390     if (x4->weightb >= 0)
00391         x4->params.analyse.b_weighted_bipred = x4->weightb;
00392     if (x4->cplxblur >= 0)
00393         x4->params.rc.f_complexity_blur = x4->cplxblur;
00394 
00395     if (x4->ssim >= 0)
00396         x4->params.analyse.b_ssim = x4->ssim;
00397     if (x4->intra_refresh >= 0)
00398         x4->params.b_intra_refresh = x4->intra_refresh;
00399     if (x4->b_bias != INT_MIN)
00400         x4->params.i_bframe_bias              = x4->b_bias;
00401     if (x4->b_pyramid >= 0)
00402         x4->params.i_bframe_pyramid = x4->b_pyramid;
00403     if (x4->mixed_refs >= 0)
00404         x4->params.analyse.b_mixed_references = x4->mixed_refs;
00405     if (x4->dct8x8 >= 0)
00406         x4->params.analyse.b_transform_8x8    = x4->dct8x8;
00407     if (x4->fast_pskip >= 0)
00408         x4->params.analyse.b_fast_pskip       = x4->fast_pskip;
00409     if (x4->aud >= 0)
00410         x4->params.b_aud                      = x4->aud;
00411     if (x4->mbtree >= 0)
00412         x4->params.rc.b_mb_tree               = x4->mbtree;
00413     if (x4->direct_pred >= 0)
00414         x4->params.analyse.i_direct_mv_pred   = x4->direct_pred;
00415 
00416     if (x4->slice_max_size >= 0)
00417         x4->params.i_slice_max_size =  x4->slice_max_size;
00418 
00419     if (x4->fastfirstpass)
00420         x264_param_apply_fastfirstpass(&x4->params);
00421 
00422     if (x4->profile)
00423         if (x264_param_apply_profile(&x4->params, x4->profile) < 0) {
00424             av_log(avctx, AV_LOG_ERROR, "Error setting profile %s.\n", x4->profile);
00425             return AVERROR(EINVAL);
00426         }
00427 
00428     x4->params.i_width          = avctx->width;
00429     x4->params.i_height         = avctx->height;
00430     x4->params.vui.i_sar_width  = avctx->sample_aspect_ratio.num;
00431     x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
00432     x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den;
00433     x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num;
00434 
00435     x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR;
00436 
00437     x4->params.i_threads      = avctx->thread_count;
00438 
00439     x4->params.b_interlaced   = avctx->flags & CODEC_FLAG_INTERLACED_DCT;
00440 
00441     x4->params.b_open_gop     = !(avctx->flags & CODEC_FLAG_CLOSED_GOP);
00442 
00443     x4->params.i_slice_count  = avctx->slices;
00444 
00445     x4->params.vui.b_fullrange = avctx->pix_fmt == PIX_FMT_YUVJ420P;
00446 
00447     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER)
00448         x4->params.b_repeat_headers = 0;
00449 
00450     // update AVCodecContext with x264 parameters
00451     avctx->has_b_frames = x4->params.i_bframe ?
00452         x4->params.i_bframe_pyramid ? 2 : 1 : 0;
00453     if (avctx->max_b_frames < 0)
00454         avctx->max_b_frames = 0;
00455 
00456     avctx->bit_rate = x4->params.rc.i_bitrate*1000;
00457 #if FF_API_X264_GLOBAL_OPTS
00458     avctx->crf = x4->params.rc.f_rf_constant;
00459 #endif
00460 
00461     x4->enc = x264_encoder_open(&x4->params);
00462     if (!x4->enc)
00463         return -1;
00464 
00465     avctx->coded_frame = &x4->out_pic;
00466 
00467     if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
00468         x264_nal_t *nal;
00469         int nnal, s, i;
00470 
00471         s = x264_encoder_headers(x4->enc, &nal, &nnal);
00472 
00473         for (i = 0; i < nnal; i++)
00474             if (nal[i].i_type == NAL_SEI)
00475                 av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25);
00476 
00477         avctx->extradata      = av_malloc(s);
00478         avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1);
00479     }
00480 
00481     return 0;
00482 }
00483 
00484 static const enum PixelFormat pix_fmts_8bit[] = {
00485     PIX_FMT_YUV420P,
00486     PIX_FMT_YUVJ420P,
00487     PIX_FMT_YUV422P,
00488     PIX_FMT_YUV444P,
00489     PIX_FMT_NONE
00490 };
00491 static const enum PixelFormat pix_fmts_9bit[] = {
00492     PIX_FMT_YUV420P9,
00493     PIX_FMT_YUV444P9,
00494     PIX_FMT_NONE
00495 };
00496 static const enum PixelFormat pix_fmts_10bit[] = {
00497     PIX_FMT_YUV420P10,
00498     PIX_FMT_YUV422P10,
00499     PIX_FMT_YUV444P10,
00500     PIX_FMT_NONE
00501 };
00502 
00503 static av_cold void X264_init_static(AVCodec *codec)
00504 {
00505     if (x264_bit_depth == 8)
00506         codec->pix_fmts = pix_fmts_8bit;
00507     else if (x264_bit_depth == 9)
00508         codec->pix_fmts = pix_fmts_9bit;
00509     else if (x264_bit_depth == 10)
00510         codec->pix_fmts = pix_fmts_10bit;
00511 }
00512 
00513 #define OFFSET(x) offsetof(X264Context, x)
00514 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
00515 static const AVOption options[] = {
00516     { "preset",        "Set the encoding preset (cf. x264 --fullhelp)",   OFFSET(preset),        AV_OPT_TYPE_STRING, { .str = "medium" }, 0, 0, VE},
00517     { "tune",          "Tune the encoding params (cf. x264 --fullhelp)",  OFFSET(tune),          AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
00518     { "profile",       "Set profile restrictions (cf. x264 --fullhelp) ", OFFSET(profile),       AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
00519     { "fastfirstpass", "Use fast settings when encoding first pass",      OFFSET(fastfirstpass), AV_OPT_TYPE_INT,    { 1 }, 0, 1, VE},
00520     { "crf",           "Select the quality for constant quality mode",    OFFSET(crf),           AV_OPT_TYPE_FLOAT,  {-1 }, -1, FLT_MAX, VE },
00521     { "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 },
00522     { "qp",            "Constant quantization parameter rate control method",OFFSET(cqp),        AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE },
00523     { "aq-mode",       "AQ method",                                       OFFSET(aq_mode),       AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE, "aq_mode"},
00524     { "none",          NULL,                              0, AV_OPT_TYPE_CONST, {X264_AQ_NONE},         INT_MIN, INT_MAX, VE, "aq_mode" },
00525     { "variance",      "Variance AQ (complexity mask)",   0, AV_OPT_TYPE_CONST, {X264_AQ_VARIANCE},     INT_MIN, INT_MAX, VE, "aq_mode" },
00526     { "autovariance",  "Auto-variance AQ (experimental)", 0, AV_OPT_TYPE_CONST, {X264_AQ_AUTOVARIANCE}, INT_MIN, INT_MAX, VE, "aq_mode" },
00527     { "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},
00528     { "psy",           "Use psychovisual optimizations.",                 OFFSET(psy),           AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE },
00529     { "psy-rd",        "Strength of psychovisual optimization, in <psy-rd>:<psy-trellis> format.", OFFSET(psy_rd), AV_OPT_TYPE_STRING,  {0 }, 0, 0, VE},
00530     { "rc-lookahead",  "Number of frames to look ahead for frametype and ratecontrol", OFFSET(rc_lookahead), AV_OPT_TYPE_INT, {-1 }, -1, INT_MAX, VE },
00531     { "weightb",       "Weighted prediction for B-frames.",               OFFSET(weightb),       AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE },
00532     { "weightp",       "Weighted prediction analysis method.",            OFFSET(weightp),       AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE, "weightp" },
00533     { "none",          NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_NONE},   INT_MIN, INT_MAX, VE, "weightp" },
00534     { "simple",        NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_SIMPLE}, INT_MIN, INT_MAX, VE, "weightp" },
00535     { "smart",         NULL, 0, AV_OPT_TYPE_CONST, {X264_WEIGHTP_SMART},  INT_MIN, INT_MAX, VE, "weightp" },
00536     { "ssim",          "Calculate and print SSIM stats.",                 OFFSET(ssim),          AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE },
00537     { "intra-refresh", "Use Periodic Intra Refresh instead of IDR frames.",OFFSET(intra_refresh),AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE },
00538     { "b-bias",        "Influences how often B-frames are used",          OFFSET(b_bias),        AV_OPT_TYPE_INT,    {INT_MIN}, INT_MIN, INT_MAX, VE },
00539     { "b-pyramid",     "Keep some B-frames as references.",               OFFSET(b_pyramid),     AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE, "b_pyramid" },
00540     { "none",          NULL,                                  0, AV_OPT_TYPE_CONST, {X264_B_PYRAMID_NONE},   INT_MIN, INT_MAX, VE, "b_pyramid" },
00541     { "strict",        "Strictly hierarchical pyramid",       0, AV_OPT_TYPE_CONST, {X264_B_PYRAMID_STRICT}, INT_MIN, INT_MAX, VE, "b_pyramid" },
00542     { "normal",        "Non-strict (not Blu-ray compatible)", 0, AV_OPT_TYPE_CONST, {X264_B_PYRAMID_NORMAL}, INT_MIN, INT_MAX, VE, "b_pyramid" },
00543     { "mixed-refs",    "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), AV_OPT_TYPE_INT, {-1}, -1, 1, VE },
00544     { "8x8dct",        "High profile 8x8 transform.",                     OFFSET(dct8x8),        AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE},
00545     { "fast-pskip",    NULL,                                              OFFSET(fast_pskip),    AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE},
00546     { "aud",           "Use access unit delimiters.",                     OFFSET(aud),           AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE},
00547     { "mbtree",        "Use macroblock tree ratecontrol.",                OFFSET(mbtree),        AV_OPT_TYPE_INT,    {-1 }, -1, 1, VE},
00548     { "deblock",       "Loop filter parameters, in <alpha:beta> form.",   OFFSET(deblock),       AV_OPT_TYPE_STRING, { 0 },  0, 0, VE},
00549     { "cplxblur",      "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), AV_OPT_TYPE_FLOAT,  {-1 }, -1, FLT_MAX, VE},
00550     { "partitions",    "A comma-separated list of partitions to consider. "
00551                        "Possible values: p8x8, p4x4, b8x8, i8x8, i4x4, none, all", OFFSET(partitions), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VE},
00552     { "direct-pred",   "Direct MV prediction mode",                       OFFSET(direct_pred),   AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE, "direct-pred" },
00553     { "none",          NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_NONE },     0, 0, VE, "direct-pred" },
00554     { "spatial",       NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_SPATIAL },  0, 0, VE, "direct-pred" },
00555     { "temporal",      NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },
00556     { "auto",          NULL,      0,    AV_OPT_TYPE_CONST, { X264_DIRECT_PRED_AUTO },     0, 0, VE, "direct-pred" },
00557     { "slice-max-size","Limit the size of each slice in bytes",           OFFSET(slice_max_size),AV_OPT_TYPE_INT,    {-1 }, -1, INT_MAX, VE },
00558     { "stats",         "Filename for 2 pass stats",                       OFFSET(stats),         AV_OPT_TYPE_STRING, { 0 },  0,       0, VE },
00559     { NULL },
00560 };
00561 
00562 static const AVClass class = {
00563     .class_name = "libx264",
00564     .item_name  = av_default_item_name,
00565     .option     = options,
00566     .version    = LIBAVUTIL_VERSION_INT,
00567 };
00568 
00569 static const AVCodecDefault x264_defaults[] = {
00570     { "b",                "0" },
00571     { "bf",               "-1" },
00572     { "g",                "-1" },
00573     { "qmin",             "-1" },
00574     { "qmax",             "-1" },
00575     { "qdiff",            "-1" },
00576     { "qblur",            "-1" },
00577     { "qcomp",            "-1" },
00578     { "refs",             "-1" },
00579     { "sc_threshold",     "-1" },
00580     { "trellis",          "-1" },
00581     { "nr",               "-1" },
00582     { "me_range",         "-1" },
00583     { "me_method",        "-1" },
00584     { "subq",             "-1" },
00585     { "b_strategy",       "-1" },
00586     { "keyint_min",       "-1" },
00587     { "coder",            "-1" },
00588     { "cmp",              "-1" },
00589     { "threads",          AV_STRINGIFY(X264_THREADS_AUTO) },
00590     { NULL },
00591 };
00592 
00593 AVCodec ff_libx264_encoder = {
00594     .name           = "libx264",
00595     .type           = AVMEDIA_TYPE_VIDEO,
00596     .id             = CODEC_ID_H264,
00597     .priv_data_size = sizeof(X264Context),
00598     .init           = X264_init,
00599     .encode         = X264_frame,
00600     .close          = X264_close,
00601     .capabilities   = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,
00602     .long_name      = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
00603     .priv_class     = &class,
00604     .defaults       = x264_defaults,
00605     .init_static_data = X264_init_static,
00606 };
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