/* * H.264 encoding using the x264 library * Copyright (C) 2005 Mans Rullgard <mans@mansr.com> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/opt.h" #include "avcodec.h" #include <x264.h> #include <math.h> #include <stdio.h> #include <stdlib.h> #include <string.h> typedef struct X264Context { AVClass *class; x264_param_t params; x264_t *enc; x264_picture_t pic; uint8_t *sei; int sei_size; AVFrame out_pic; char *preset; char *tune; char *profile; char *level; int fastfirstpass; char *stats; char *weightp; char *x264opts; } X264Context; static void X264_log(void *p, int level, const char *fmt, va_list args) { static const int level_map[] = { [X264_LOG_ERROR] = AV_LOG_ERROR, [X264_LOG_WARNING] = AV_LOG_WARNING, [X264_LOG_INFO] = AV_LOG_INFO, [X264_LOG_DEBUG] = AV_LOG_DEBUG }; if (level < 0 || level > X264_LOG_DEBUG) return; av_vlog(p, level_map[level], fmt, args); } static int encode_nals(AVCodecContext *ctx, uint8_t *buf, int size, x264_nal_t *nals, int nnal, int skip_sei) { X264Context *x4 = ctx->priv_data; uint8_t *p = buf; int i; /* Write the SEI as part of the first frame. */ if (x4->sei_size > 0 && nnal > 0) { memcpy(p, x4->sei, x4->sei_size); p += x4->sei_size; x4->sei_size = 0; } for (i = 0; i < nnal; i++){ /* Don't put the SEI in extradata. */ if (skip_sei && nals[i].i_type == NAL_SEI) { x4->sei_size = nals[i].i_payload; x4->sei = av_malloc(x4->sei_size); memcpy(x4->sei, nals[i].p_payload, nals[i].i_payload); continue; } memcpy(p, nals[i].p_payload, nals[i].i_payload); p += nals[i].i_payload; } return p - buf; } static int X264_frame(AVCodecContext *ctx, uint8_t *buf, int bufsize, void *data) { X264Context *x4 = ctx->priv_data; AVFrame *frame = data; x264_nal_t *nal; int nnal, i; x264_picture_t pic_out; x264_picture_init( &x4->pic ); x4->pic.img.i_csp = X264_CSP_I420; x4->pic.img.i_plane = 3; if (frame) { for (i = 0; i < 3; i++) { x4->pic.img.plane[i] = frame->data[i]; x4->pic.img.i_stride[i] = frame->linesize[i]; } x4->pic.i_pts = frame->pts; x4->pic.i_type = frame->pict_type == AV_PICTURE_TYPE_I ? X264_TYPE_KEYFRAME : frame->pict_type == AV_PICTURE_TYPE_P ? X264_TYPE_P : frame->pict_type == AV_PICTURE_TYPE_B ? X264_TYPE_B : X264_TYPE_AUTO; if (x4->params.b_tff != frame->top_field_first) { x4->params.b_tff = frame->top_field_first; x264_encoder_reconfig(x4->enc, &x4->params); } if (x4->params.vui.i_sar_height != ctx->sample_aspect_ratio.den || x4->params.vui.i_sar_width != ctx->sample_aspect_ratio.num) { x4->params.vui.i_sar_height = ctx->sample_aspect_ratio.den; x4->params.vui.i_sar_width = ctx->sample_aspect_ratio.num; x264_encoder_reconfig(x4->enc, &x4->params); } } do { if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0) return -1; bufsize = encode_nals(ctx, buf, bufsize, nal, nnal, 0); if (bufsize < 0) return -1; } while (!bufsize && !frame && x264_encoder_delayed_frames(x4->enc)); /* FIXME: libx264 now provides DTS, but AVFrame doesn't have a field for it. */ x4->out_pic.pts = pic_out.i_pts; switch (pic_out.i_type) { case X264_TYPE_IDR: case X264_TYPE_I: x4->out_pic.pict_type = AV_PICTURE_TYPE_I; break; case X264_TYPE_P: x4->out_pic.pict_type = AV_PICTURE_TYPE_P; break; case X264_TYPE_B: case X264_TYPE_BREF: x4->out_pic.pict_type = AV_PICTURE_TYPE_B; break; } x4->out_pic.key_frame = pic_out.b_keyframe; if (bufsize) x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA; return bufsize; } static av_cold int X264_close(AVCodecContext *avctx) { X264Context *x4 = avctx->priv_data; av_freep(&avctx->extradata); av_free(x4->sei); if (x4->enc) x264_encoder_close(x4->enc); av_free(x4->preset); av_free(x4->tune); av_free(x4->profile); av_free(x4->level); av_free(x4->stats); av_free(x4->weightp); av_free(x4->x264opts); return 0; } /** * Detect default settings and use default profile to avoid libx264 failure. */ static void check_default_settings(AVCodecContext *avctx) { X264Context *x4 = avctx->priv_data; int score = 0; score += x4->params.analyse.i_me_range == 0; score += x4->params.rc.i_qp_step == 3; score += x4->params.i_keyint_max == 12; score += x4->params.rc.i_qp_min == 2; score += x4->params.rc.i_qp_max == 31; score += x4->params.rc.f_qcompress == 0.5; score += fabs(x4->params.rc.f_ip_factor - 1.25) < 0.01; score += fabs(x4->params.rc.f_pb_factor - 1.25) < 0.01; score += x4->params.analyse.inter == 0 && x4->params.analyse.i_subpel_refine == 8; if (score >= 5) { av_log(avctx, AV_LOG_ERROR, "Default settings detected, using medium profile\n"); x4->preset = av_strdup("medium"); if (avctx->bit_rate == 200*1000) avctx->crf = 23; } } #define OPT_STR(opt, param) \ do { \ if (param && x264_param_parse(&x4->params, opt, param) < 0) { \ av_log(avctx, AV_LOG_ERROR, \ "bad value for '%s': '%s'\n", opt, param); \ return -1; \ } \ } while (0); \ static av_cold int X264_init(AVCodecContext *avctx) { X264Context *x4 = avctx->priv_data; x4->sei_size = 0; x264_param_default(&x4->params); x4->params.i_keyint_max = avctx->gop_size; x4->params.i_bframe = avctx->max_b_frames; x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC; x4->params.i_bframe_adaptive = avctx->b_frame_strategy; x4->params.i_bframe_bias = avctx->bframebias; x4->params.i_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE; x4->params.i_keyint_min = avctx->keyint_min; if (x4->params.i_keyint_min > x4->params.i_keyint_max) x4->params.i_keyint_min = x4->params.i_keyint_max; x4->params.i_scenecut_threshold = avctx->scenechange_threshold; x4->params.b_deblocking_filter = avctx->flags & CODEC_FLAG_LOOP_FILTER; x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha; x4->params.i_deblocking_filter_beta = avctx->deblockbeta; x4->params.rc.i_qp_min = avctx->qmin; x4->params.rc.i_qp_max = avctx->qmax; x4->params.rc.i_qp_step = avctx->max_qdiff; x4->params.rc.f_qcompress = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */ x4->params.rc.f_qblur = avctx->qblur; /* temporally blur quants */ x4->params.rc.f_complexity_blur = avctx->complexityblur; x4->params.i_frame_reference = avctx->refs; x4->params.analyse.inter = 0; if (avctx->partitions) { if (avctx->partitions & X264_PART_I4X4) x4->params.analyse.inter |= X264_ANALYSE_I4x4; if (avctx->partitions & X264_PART_I8X8) x4->params.analyse.inter |= X264_ANALYSE_I8x8; if (avctx->partitions & X264_PART_P8X8) x4->params.analyse.inter |= X264_ANALYSE_PSUB16x16; if (avctx->partitions & X264_PART_P4X4) x4->params.analyse.inter |= X264_ANALYSE_PSUB8x8; if (avctx->partitions & X264_PART_B8X8) x4->params.analyse.inter |= X264_ANALYSE_BSUB16x16; } x4->params.analyse.i_direct_mv_pred = avctx->directpred; x4->params.analyse.b_weighted_bipred = avctx->flags2 & CODEC_FLAG2_WPRED; if (avctx->me_method == ME_EPZS) x4->params.analyse.i_me_method = X264_ME_DIA; else if (avctx->me_method == ME_HEX) x4->params.analyse.i_me_method = X264_ME_HEX; else if (avctx->me_method == ME_UMH) x4->params.analyse.i_me_method = X264_ME_UMH; else if (avctx->me_method == ME_FULL) x4->params.analyse.i_me_method = X264_ME_ESA; else if (avctx->me_method == ME_TESA) x4->params.analyse.i_me_method = X264_ME_TESA; else x4->params.analyse.i_me_method = X264_ME_HEX; x4->params.rc.i_aq_mode = avctx->aq_mode; x4->params.rc.f_aq_strength = avctx->aq_strength; x4->params.rc.i_lookahead = avctx->rc_lookahead; x4->params.analyse.b_psy = avctx->flags2 & CODEC_FLAG2_PSY; x4->params.analyse.f_psy_rd = avctx->psy_rd; x4->params.analyse.f_psy_trellis = avctx->psy_trellis; x4->params.analyse.i_me_range = avctx->me_range; x4->params.analyse.i_subpel_refine = avctx->me_subpel_quality; x4->params.analyse.b_mixed_references = avctx->flags2 & CODEC_FLAG2_MIXED_REFS; x4->params.analyse.b_chroma_me = avctx->me_cmp & FF_CMP_CHROMA; x4->params.analyse.b_transform_8x8 = avctx->flags2 & CODEC_FLAG2_8X8DCT; x4->params.analyse.b_fast_pskip = avctx->flags2 & CODEC_FLAG2_FASTPSKIP; x4->params.analyse.i_trellis = avctx->trellis; x4->params.analyse.i_noise_reduction = avctx->noise_reduction; x4->params.rc.b_mb_tree = !!(avctx->flags2 & CODEC_FLAG2_MBTREE); x4->params.rc.f_ip_factor = 1 / fabs(avctx->i_quant_factor); x4->params.rc.f_pb_factor = avctx->b_quant_factor; x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset; if (!x4->preset) check_default_settings(avctx); if (x4->preset || x4->tune) { if (x264_param_default_preset(&x4->params, x4->preset, x4->tune) < 0) return -1; } x4->params.pf_log = X264_log; x4->params.p_log_private = avctx; x4->params.i_log_level = X264_LOG_DEBUG; OPT_STR("weightp", x4->weightp); x4->params.b_intra_refresh = avctx->flags2 & CODEC_FLAG2_INTRA_REFRESH; x4->params.rc.i_bitrate = avctx->bit_rate / 1000; x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000; x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate / 1000; x4->params.rc.b_stat_write = avctx->flags & CODEC_FLAG_PASS1; if (avctx->flags & CODEC_FLAG_PASS2) { x4->params.rc.b_stat_read = 1; } else { if (avctx->crf) { x4->params.rc.i_rc_method = X264_RC_CRF; x4->params.rc.f_rf_constant = avctx->crf; x4->params.rc.f_rf_constant_max = avctx->crf_max; } else if (avctx->cqp > -1) { x4->params.rc.i_rc_method = X264_RC_CQP; x4->params.rc.i_qp_constant = avctx->cqp; } } OPT_STR("stats", x4->stats); // if neither crf nor cqp modes are selected we have to enable the RC // we do it this way because we cannot check if the bitrate has been set if (!(avctx->crf || (avctx->cqp > -1))) x4->params.rc.i_rc_method = X264_RC_ABR; if (avctx->rc_buffer_size && avctx->rc_initial_buffer_occupancy && (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) { x4->params.rc.f_vbv_buffer_init = (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size; } OPT_STR("level", x4->level); if(x4->x264opts){ const char *p= x4->x264opts; while(p){ char param[256]={0}, val[256]={0}; sscanf(p, "%255[^:=]=%255[^:]", param, val); OPT_STR(param, val); p= strchr(p, ':'); p+=!!p; } } if (x4->fastfirstpass) x264_param_apply_fastfirstpass(&x4->params); if (x4->profile) if (x264_param_apply_profile(&x4->params, x4->profile) < 0) return -1; x4->params.i_width = avctx->width; x4->params.i_height = avctx->height; x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num; x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den; x4->params.i_fps_num = x4->params.i_timebase_den = avctx->time_base.den; x4->params.i_fps_den = x4->params.i_timebase_num = avctx->time_base.num; x4->params.analyse.b_psnr = avctx->flags & CODEC_FLAG_PSNR; x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM; x4->params.b_aud = avctx->flags2 & CODEC_FLAG2_AUD; x4->params.i_threads = avctx->thread_count; x4->params.b_interlaced = avctx->flags & CODEC_FLAG_INTERLACED_DCT; x4->params.b_open_gop = !(avctx->flags & CODEC_FLAG_CLOSED_GOP); x4->params.i_slice_count = avctx->slices; x4->params.vui.b_fullrange = avctx->pix_fmt == PIX_FMT_YUVJ420P; if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) x4->params.b_repeat_headers = 0; // update AVCodecContext with x264 parameters avctx->has_b_frames = x4->params.i_bframe ? x4->params.i_bframe_pyramid ? 2 : 1 : 0; avctx->bit_rate = x4->params.rc.i_bitrate*1000; avctx->crf = x4->params.rc.f_rf_constant; x4->enc = x264_encoder_open(&x4->params); if (!x4->enc) return -1; avctx->coded_frame = &x4->out_pic; if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { x264_nal_t *nal; int nnal, s, i; s = x264_encoder_headers(x4->enc, &nal, &nnal); for (i = 0; i < nnal; i++) if (nal[i].i_type == NAL_SEI) av_log(avctx, AV_LOG_INFO, "%s\n", nal[i].p_payload+25); avctx->extradata = av_malloc(s); avctx->extradata_size = encode_nals(avctx, avctx->extradata, s, nal, nnal, 1); } return 0; } #define OFFSET(x) offsetof(X264Context,x) #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM static const AVOption options[] = { {"preset", "Set the encoding preset", OFFSET(preset), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE}, {"tune", "Tune the encoding params", OFFSET(tune), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE}, {"fastfirstpass", "Use fast settings when encoding first pass", OFFSET(fastfirstpass), FF_OPT_TYPE_INT, {.dbl=1}, 0, 1, VE}, {"profile", "Set profile restrictions", OFFSET(profile), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE}, {"level", "Specify level (as defined by Annex A)", OFFSET(level), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE}, {"passlogfile", "Filename for 2 pass stats", OFFSET(stats), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE}, {"wpredp", "Weighted prediction for P-frames", OFFSET(weightp), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE}, {"x264opts", "x264 options", OFFSET(x264opts), FF_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE}, { NULL }, }; static const AVClass class = { "libx264", av_default_item_name, options, LIBAVUTIL_VERSION_INT }; AVCodec ff_libx264_encoder = { .name = "libx264", .type = AVMEDIA_TYPE_VIDEO, .id = CODEC_ID_H264, .priv_data_size = sizeof(X264Context), .init = X264_init, .encode = X264_frame, .close = X264_close, .capabilities = CODEC_CAP_DELAY, .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV420P, PIX_FMT_YUVJ420P, PIX_FMT_NONE }, .long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"), .priv_class = &class, };