| /* |
| * 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) { |
| if (x4->sei_size > size) { |
| av_log(ctx, AV_LOG_ERROR, "Error: nal buffer is too small\n"); |
| return -1; |
| } |
| memcpy(p, x4->sei, x4->sei_size); |
| p += x4->sei_size; |
| x4->sei_size = 0; |
| // why is x4->sei not freed? |
| } |
| |
| 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; |
| } |
| if (nals[i].i_payload > (size - (p - buf))) { |
| // return only complete nals which fit in buf |
| av_log(ctx, AV_LOG_ERROR, "Error: nal buffer is too small\n"); |
| break; |
| } |
| 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 orig_bufsize, void *data) |
| { |
| X264Context *x4 = ctx->priv_data; |
| AVFrame *frame = data; |
| x264_nal_t *nal; |
| int nnal, i; |
| x264_picture_t pic_out; |
| int bufsize; |
| |
| 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 { |
| bufsize = orig_bufsize; |
| 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); |
| |
| 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, |
| }; |
