/* * 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 #include #include "ffmpeg.h" #include "libavutil/avassert.h" #include "libavutil/avstring.h" #include "libavutil/avutil.h" #include "libavutil/dict.h" #include "libavutil/display.h" #include "libavutil/eval.h" #include "libavutil/frame.h" #include "libavutil/intreadwrite.h" #include "libavutil/log.h" #include "libavutil/mem.h" #include "libavutil/pixdesc.h" #include "libavutil/rational.h" #include "libavutil/time.h" #include "libavutil/timestamp.h" #include "libavcodec/avcodec.h" struct Encoder { // combined size of all the packets received from the encoder uint64_t data_size; // number of packets received from the encoder uint64_t packets_encoded; int opened; int attach_par; Scheduler *sch; unsigned sch_idx; }; // data that is local to the decoder thread and not visible outside of it typedef struct EncoderThread { AVFrame *frame; AVPacket *pkt; } EncoderThread; void enc_free(Encoder **penc) { Encoder *enc = *penc; if (!enc) return; av_freep(penc); } int enc_alloc(Encoder **penc, const AVCodec *codec, Scheduler *sch, unsigned sch_idx) { Encoder *enc; *penc = NULL; enc = av_mallocz(sizeof(*enc)); if (!enc) return AVERROR(ENOMEM); enc->sch = sch; enc->sch_idx = sch_idx; *penc = enc; return 0; } static int hw_device_setup_for_encode(OutputStream *ost, AVBufferRef *frames_ref) { const AVCodecHWConfig *config; HWDevice *dev = NULL; if (frames_ref && ((AVHWFramesContext*)frames_ref->data)->format == ost->enc_ctx->pix_fmt) { // Matching format, will try to use hw_frames_ctx. } else { frames_ref = NULL; } for (int i = 0;; i++) { config = avcodec_get_hw_config(ost->enc_ctx->codec, i); if (!config) break; if (frames_ref && config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX && (config->pix_fmt == AV_PIX_FMT_NONE || config->pix_fmt == ost->enc_ctx->pix_fmt)) { av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using input " "frames context (format %s) with %s encoder.\n", av_get_pix_fmt_name(ost->enc_ctx->pix_fmt), ost->enc_ctx->codec->name); ost->enc_ctx->hw_frames_ctx = av_buffer_ref(frames_ref); if (!ost->enc_ctx->hw_frames_ctx) return AVERROR(ENOMEM); return 0; } if (!dev && config->methods & AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX) dev = hw_device_get_by_type(config->device_type); } if (dev) { av_log(ost->enc_ctx, AV_LOG_VERBOSE, "Using device %s " "(type %s) with %s encoder.\n", dev->name, av_hwdevice_get_type_name(dev->type), ost->enc_ctx->codec->name); ost->enc_ctx->hw_device_ctx = av_buffer_ref(dev->device_ref); if (!ost->enc_ctx->hw_device_ctx) return AVERROR(ENOMEM); } else { // No device required, or no device available. } return 0; } static int set_encoder_id(OutputFile *of, OutputStream *ost) { const char *cname = ost->enc_ctx->codec->name; uint8_t *encoder_string; int encoder_string_len; if (av_dict_get(ost->st->metadata, "encoder", NULL, 0)) return 0; encoder_string_len = sizeof(LIBAVCODEC_IDENT) + strlen(cname) + 2; encoder_string = av_mallocz(encoder_string_len); if (!encoder_string) return AVERROR(ENOMEM); if (!of->bitexact && !ost->bitexact) av_strlcpy(encoder_string, LIBAVCODEC_IDENT " ", encoder_string_len); else av_strlcpy(encoder_string, "Lavc ", encoder_string_len); av_strlcat(encoder_string, cname, encoder_string_len); av_dict_set(&ost->st->metadata, "encoder", encoder_string, AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE); return 0; } int enc_open(void *opaque, const AVFrame *frame) { OutputStream *ost = opaque; InputStream *ist = ost->ist; Encoder *e = ost->enc; AVCodecContext *enc_ctx = ost->enc_ctx; Decoder *dec; const AVCodec *enc = enc_ctx->codec; OutputFile *of = ost->file; FrameData *fd; int frame_samples = 0; int ret; if (e->opened) return 0; // frame is always non-NULL for audio and video av_assert0(frame || (enc->type != AVMEDIA_TYPE_VIDEO && enc->type != AVMEDIA_TYPE_AUDIO)); if (frame) { av_assert0(frame->opaque_ref); fd = (FrameData*)frame->opaque_ref->data; for (int i = 0; i < frame->nb_side_data; i++) { const AVSideDataDescriptor *desc = av_frame_side_data_desc(frame->side_data[i]->type); if (!(desc->props & AV_SIDE_DATA_PROP_GLOBAL)) continue; ret = av_frame_side_data_clone(&enc_ctx->decoded_side_data, &enc_ctx->nb_decoded_side_data, frame->side_data[i], AV_FRAME_SIDE_DATA_FLAG_UNIQUE); if (ret < 0) return ret; } } ret = set_encoder_id(of, ost); if (ret < 0) return ret; if (ist) dec = ist->decoder; // the timebase is chosen by filtering code if (ost->type == AVMEDIA_TYPE_AUDIO || ost->type == AVMEDIA_TYPE_VIDEO) { enc_ctx->time_base = frame->time_base; enc_ctx->framerate = fd->frame_rate_filter; ost->st->avg_frame_rate = fd->frame_rate_filter; } switch (enc_ctx->codec_type) { case AVMEDIA_TYPE_AUDIO: av_assert0(frame->format != AV_SAMPLE_FMT_NONE && frame->sample_rate > 0 && frame->ch_layout.nb_channels > 0); enc_ctx->sample_fmt = frame->format; enc_ctx->sample_rate = frame->sample_rate; ret = av_channel_layout_copy(&enc_ctx->ch_layout, &frame->ch_layout); if (ret < 0) return ret; if (ost->bits_per_raw_sample) enc_ctx->bits_per_raw_sample = ost->bits_per_raw_sample; else enc_ctx->bits_per_raw_sample = FFMIN(fd->bits_per_raw_sample, av_get_bytes_per_sample(enc_ctx->sample_fmt) << 3); break; case AVMEDIA_TYPE_VIDEO: { av_assert0(frame->format != AV_PIX_FMT_NONE && frame->width > 0 && frame->height > 0); enc_ctx->width = frame->width; enc_ctx->height = frame->height; enc_ctx->sample_aspect_ratio = ost->st->sample_aspect_ratio = ost->frame_aspect_ratio.num ? // overridden by the -aspect cli option av_mul_q(ost->frame_aspect_ratio, (AVRational){ enc_ctx->height, enc_ctx->width }) : frame->sample_aspect_ratio; enc_ctx->pix_fmt = frame->format; if (ost->bits_per_raw_sample) enc_ctx->bits_per_raw_sample = ost->bits_per_raw_sample; else enc_ctx->bits_per_raw_sample = FFMIN(fd->bits_per_raw_sample, av_pix_fmt_desc_get(enc_ctx->pix_fmt)->comp[0].depth); enc_ctx->color_range = frame->color_range; enc_ctx->color_primaries = frame->color_primaries; enc_ctx->color_trc = frame->color_trc; enc_ctx->colorspace = frame->colorspace; enc_ctx->chroma_sample_location = frame->chroma_location; if (enc_ctx->flags & (AV_CODEC_FLAG_INTERLACED_DCT | AV_CODEC_FLAG_INTERLACED_ME) || (frame->flags & AV_FRAME_FLAG_INTERLACED) #if FFMPEG_OPT_TOP || ost->top_field_first >= 0 #endif ) { int top_field_first = #if FFMPEG_OPT_TOP ost->top_field_first >= 0 ? ost->top_field_first : #endif !!(frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST); if (enc->id == AV_CODEC_ID_MJPEG) enc_ctx->field_order = top_field_first ? AV_FIELD_TT : AV_FIELD_BB; else enc_ctx->field_order = top_field_first ? AV_FIELD_TB : AV_FIELD_BT; } else enc_ctx->field_order = AV_FIELD_PROGRESSIVE; break; } case AVMEDIA_TYPE_SUBTITLE: if (ost->enc_timebase.num) av_log(ost, AV_LOG_WARNING, "-enc_time_base not supported for subtitles, ignoring\n"); enc_ctx->time_base = AV_TIME_BASE_Q; if (!enc_ctx->width) { enc_ctx->width = ost->ist->par->width; enc_ctx->height = ost->ist->par->height; } av_assert0(dec); if (dec->subtitle_header) { /* ASS code assumes this buffer is null terminated so add extra byte. */ enc_ctx->subtitle_header = av_mallocz(dec->subtitle_header_size + 1); if (!enc_ctx->subtitle_header) return AVERROR(ENOMEM); memcpy(enc_ctx->subtitle_header, dec->subtitle_header, dec->subtitle_header_size); enc_ctx->subtitle_header_size = dec->subtitle_header_size; } break; default: av_assert0(0); break; } if (ost->bitexact) enc_ctx->flags |= AV_CODEC_FLAG_BITEXACT; if (!av_dict_get(ost->encoder_opts, "threads", NULL, 0)) av_dict_set(&ost->encoder_opts, "threads", "auto", 0); if (enc->capabilities & AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE) { ret = av_dict_set(&ost->encoder_opts, "flags", "+copy_opaque", AV_DICT_MULTIKEY); if (ret < 0) return ret; } av_dict_set(&ost->encoder_opts, "flags", "+frame_duration", AV_DICT_MULTIKEY); ret = hw_device_setup_for_encode(ost, frame ? frame->hw_frames_ctx : NULL); if (ret < 0) { av_log(ost, AV_LOG_ERROR, "Encoding hardware device setup failed: %s\n", av_err2str(ret)); return ret; } if ((ret = avcodec_open2(ost->enc_ctx, enc, &ost->encoder_opts)) < 0) { if (ret != AVERROR_EXPERIMENTAL) av_log(ost, AV_LOG_ERROR, "Error while opening encoder - maybe " "incorrect parameters such as bit_rate, rate, width or height.\n"); return ret; } e->opened = 1; if (ost->enc_ctx->frame_size) frame_samples = ost->enc_ctx->frame_size; ret = check_avoptions(ost->encoder_opts); if (ret < 0) return ret; if (ost->enc_ctx->bit_rate && ost->enc_ctx->bit_rate < 1000 && ost->enc_ctx->codec_id != AV_CODEC_ID_CODEC2 /* don't complain about 700 bit/s modes */) av_log(ost, AV_LOG_WARNING, "The bitrate parameter is set too low." " It takes bits/s as argument, not kbits/s\n"); ret = avcodec_parameters_from_context(ost->par_in, ost->enc_ctx); if (ret < 0) { av_log(ost, AV_LOG_FATAL, "Error initializing the output stream codec context.\n"); return ret; } // copy timebase while removing common factors if (ost->st->time_base.num <= 0 || ost->st->time_base.den <= 0) ost->st->time_base = av_add_q(ost->enc_ctx->time_base, (AVRational){0, 1}); ret = of_stream_init(of, ost); if (ret < 0) return ret; return frame_samples; } static int check_recording_time(OutputStream *ost, int64_t ts, AVRational tb) { OutputFile *of = ost->file; if (of->recording_time != INT64_MAX && av_compare_ts(ts, tb, of->recording_time, AV_TIME_BASE_Q) >= 0) { return 0; } return 1; } static int do_subtitle_out(OutputFile *of, OutputStream *ost, const AVSubtitle *sub, AVPacket *pkt) { Encoder *e = ost->enc; int subtitle_out_max_size = 1024 * 1024; int subtitle_out_size, nb, i, ret; AVCodecContext *enc; int64_t pts; if (sub->pts == AV_NOPTS_VALUE) { av_log(ost, AV_LOG_ERROR, "Subtitle packets must have a pts\n"); return exit_on_error ? AVERROR(EINVAL) : 0; } if ((of->start_time != AV_NOPTS_VALUE && sub->pts < of->start_time)) return 0; enc = ost->enc_ctx; /* Note: DVB subtitle need one packet to draw them and one other packet to clear them */ /* XXX: signal it in the codec context ? */ if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) nb = 2; else if (enc->codec_id == AV_CODEC_ID_ASS) nb = FFMAX(sub->num_rects, 1); else nb = 1; /* shift timestamp to honor -ss and make check_recording_time() work with -t */ pts = sub->pts; if (of->start_time != AV_NOPTS_VALUE) pts -= of->start_time; for (i = 0; i < nb; i++) { AVSubtitle local_sub = *sub; if (!check_recording_time(ost, pts, AV_TIME_BASE_Q)) return AVERROR_EOF; ret = av_new_packet(pkt, subtitle_out_max_size); if (ret < 0) return AVERROR(ENOMEM); local_sub.pts = pts; // start_display_time is required to be 0 local_sub.pts += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q); local_sub.end_display_time -= sub->start_display_time; local_sub.start_display_time = 0; if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE && i == 1) local_sub.num_rects = 0; else if (enc->codec_id == AV_CODEC_ID_ASS && sub->num_rects > 0) { local_sub.num_rects = 1; local_sub.rects += i; } ost->frames_encoded++; subtitle_out_size = avcodec_encode_subtitle(enc, pkt->data, pkt->size, &local_sub); if (subtitle_out_size < 0) { av_log(ost, AV_LOG_FATAL, "Subtitle encoding failed\n"); return subtitle_out_size; } av_shrink_packet(pkt, subtitle_out_size); pkt->time_base = AV_TIME_BASE_Q; pkt->pts = sub->pts; pkt->duration = av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, pkt->time_base); if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) { /* XXX: the pts correction is handled here. Maybe handling it in the codec would be better */ if (i == 0) pkt->pts += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, pkt->time_base); else pkt->pts += av_rescale_q(sub->end_display_time, (AVRational){ 1, 1000 }, pkt->time_base); } pkt->dts = pkt->pts; ret = sch_enc_send(e->sch, e->sch_idx, pkt); if (ret < 0) { av_packet_unref(pkt); return ret; } } return 0; } void enc_stats_write(OutputStream *ost, EncStats *es, const AVFrame *frame, const AVPacket *pkt, uint64_t frame_num) { Encoder *e = ost->enc; AVIOContext *io = es->io; AVRational tb = frame ? frame->time_base : pkt->time_base; int64_t pts = frame ? frame->pts : pkt->pts; AVRational tbi = (AVRational){ 0, 1}; int64_t ptsi = INT64_MAX; const FrameData *fd; if ((frame && frame->opaque_ref) || (pkt && pkt->opaque_ref)) { fd = (const FrameData*)(frame ? frame->opaque_ref->data : pkt->opaque_ref->data); tbi = fd->dec.tb; ptsi = fd->dec.pts; } pthread_mutex_lock(&es->lock); for (size_t i = 0; i < es->nb_components; i++) { const EncStatsComponent *c = &es->components[i]; switch (c->type) { case ENC_STATS_LITERAL: avio_write (io, c->str, c->str_len); continue; case ENC_STATS_FILE_IDX: avio_printf(io, "%d", ost->file->index); continue; case ENC_STATS_STREAM_IDX: avio_printf(io, "%d", ost->index); continue; case ENC_STATS_TIMEBASE: avio_printf(io, "%d/%d", tb.num, tb.den); continue; case ENC_STATS_TIMEBASE_IN: avio_printf(io, "%d/%d", tbi.num, tbi.den); continue; case ENC_STATS_PTS: avio_printf(io, "%"PRId64, pts); continue; case ENC_STATS_PTS_IN: avio_printf(io, "%"PRId64, ptsi); continue; case ENC_STATS_PTS_TIME: avio_printf(io, "%g", pts * av_q2d(tb)); continue; case ENC_STATS_PTS_TIME_IN: avio_printf(io, "%g", ptsi == INT64_MAX ? INFINITY : ptsi * av_q2d(tbi)); continue; case ENC_STATS_FRAME_NUM: avio_printf(io, "%"PRIu64, frame_num); continue; case ENC_STATS_FRAME_NUM_IN: avio_printf(io, "%"PRIu64, fd ? fd->dec.frame_num : -1); continue; } if (frame) { switch (c->type) { case ENC_STATS_SAMPLE_NUM: avio_printf(io, "%"PRIu64, ost->samples_encoded); continue; case ENC_STATS_NB_SAMPLES: avio_printf(io, "%d", frame->nb_samples); continue; default: av_assert0(0); } } else { switch (c->type) { case ENC_STATS_DTS: avio_printf(io, "%"PRId64, pkt->dts); continue; case ENC_STATS_DTS_TIME: avio_printf(io, "%g", pkt->dts * av_q2d(tb)); continue; case ENC_STATS_PKT_SIZE: avio_printf(io, "%d", pkt->size); continue; case ENC_STATS_KEYFRAME: avio_write(io, (pkt->flags & AV_PKT_FLAG_KEY) ? "K" : "N", 1); continue; case ENC_STATS_BITRATE: { double duration = FFMAX(pkt->duration, 1) * av_q2d(tb); avio_printf(io, "%g", 8.0 * pkt->size / duration); continue; } case ENC_STATS_AVG_BITRATE: { double duration = pkt->dts * av_q2d(tb); avio_printf(io, "%g", duration > 0 ? 8.0 * e->data_size / duration : -1.); continue; } default: av_assert0(0); } } } avio_w8(io, '\n'); avio_flush(io); pthread_mutex_unlock(&es->lock); } static inline double psnr(double d) { return -10.0 * log10(d); } static int update_video_stats(OutputStream *ost, const AVPacket *pkt, int write_vstats) { Encoder *e = ost->enc; const uint8_t *sd = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_STATS, NULL); AVCodecContext *enc = ost->enc_ctx; enum AVPictureType pict_type; int64_t frame_number; double ti1, bitrate, avg_bitrate; double psnr_val = -1; int quality; quality = sd ? AV_RL32(sd) : -1; pict_type = sd ? sd[4] : AV_PICTURE_TYPE_NONE; atomic_store(&ost->quality, quality); if ((enc->flags & AV_CODEC_FLAG_PSNR) && sd && sd[5]) { // FIXME the scaling assumes 8bit double error = AV_RL64(sd + 8) / (enc->width * enc->height * 255.0 * 255.0); if (error >= 0 && error <= 1) psnr_val = psnr(error); } if (!write_vstats) return 0; /* this is executed just the first time update_video_stats is called */ if (!vstats_file) { vstats_file = fopen(vstats_filename, "w"); if (!vstats_file) { perror("fopen"); return AVERROR(errno); } } frame_number = e->packets_encoded; if (vstats_version <= 1) { fprintf(vstats_file, "frame= %5"PRId64" q= %2.1f ", frame_number, quality / (float)FF_QP2LAMBDA); } else { fprintf(vstats_file, "out= %2d st= %2d frame= %5"PRId64" q= %2.1f ", ost->file->index, ost->index, frame_number, quality / (float)FF_QP2LAMBDA); } if (psnr_val >= 0) fprintf(vstats_file, "PSNR= %6.2f ", psnr_val); fprintf(vstats_file,"f_size= %6d ", pkt->size); /* compute pts value */ ti1 = pkt->dts * av_q2d(pkt->time_base); if (ti1 < 0.01) ti1 = 0.01; bitrate = (pkt->size * 8) / av_q2d(enc->time_base) / 1000.0; avg_bitrate = (double)(e->data_size * 8) / ti1 / 1000.0; fprintf(vstats_file, "s_size= %8.0fKiB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ", (double)e->data_size / 1024, ti1, bitrate, avg_bitrate); fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(pict_type)); return 0; } static int encode_frame(OutputFile *of, OutputStream *ost, AVFrame *frame, AVPacket *pkt) { Encoder *e = ost->enc; AVCodecContext *enc = ost->enc_ctx; const char *type_desc = av_get_media_type_string(enc->codec_type); const char *action = frame ? "encode" : "flush"; int ret; if (frame) { FrameData *fd = frame_data(frame); if (!fd) return AVERROR(ENOMEM); fd->wallclock[LATENCY_PROBE_ENC_PRE] = av_gettime_relative(); if (ost->enc_stats_pre.io) enc_stats_write(ost, &ost->enc_stats_pre, frame, NULL, ost->frames_encoded); ost->frames_encoded++; ost->samples_encoded += frame->nb_samples; if (debug_ts) { av_log(ost, AV_LOG_INFO, "encoder <- type:%s " "frame_pts:%s frame_pts_time:%s time_base:%d/%d\n", type_desc, av_ts2str(frame->pts), av_ts2timestr(frame->pts, &enc->time_base), enc->time_base.num, enc->time_base.den); } if (frame->sample_aspect_ratio.num && !ost->frame_aspect_ratio.num) enc->sample_aspect_ratio = frame->sample_aspect_ratio; } update_benchmark(NULL); ret = avcodec_send_frame(enc, frame); if (ret < 0 && !(ret == AVERROR_EOF && !frame)) { av_log(ost, AV_LOG_ERROR, "Error submitting %s frame to the encoder\n", type_desc); return ret; } while (1) { FrameData *fd; av_packet_unref(pkt); ret = avcodec_receive_packet(enc, pkt); update_benchmark("%s_%s %d.%d", action, type_desc, of->index, ost->index); pkt->time_base = enc->time_base; /* if two pass, output log on success and EOF */ if ((ret >= 0 || ret == AVERROR_EOF) && ost->logfile && enc->stats_out) fprintf(ost->logfile, "%s", enc->stats_out); if (ret == AVERROR(EAGAIN)) { av_assert0(frame); // should never happen during flushing return 0; } else if (ret < 0) { if (ret != AVERROR_EOF) av_log(ost, AV_LOG_ERROR, "%s encoding failed\n", type_desc); return ret; } fd = packet_data(pkt); if (!fd) return AVERROR(ENOMEM); fd->wallclock[LATENCY_PROBE_ENC_POST] = av_gettime_relative(); // attach stream parameters to first packet if requested avcodec_parameters_free(&fd->par_enc); if (e->attach_par && !e->packets_encoded) { fd->par_enc = avcodec_parameters_alloc(); if (!fd->par_enc) return AVERROR(ENOMEM); ret = avcodec_parameters_from_context(fd->par_enc, enc); if (ret < 0) return ret; } pkt->flags |= AV_PKT_FLAG_TRUSTED; if (enc->codec_type == AVMEDIA_TYPE_VIDEO) { ret = update_video_stats(ost, pkt, !!vstats_filename); if (ret < 0) return ret; } if (ost->enc_stats_post.io) enc_stats_write(ost, &ost->enc_stats_post, NULL, pkt, e->packets_encoded); if (debug_ts) { av_log(ost, AV_LOG_INFO, "encoder -> type:%s " "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s " "duration:%s duration_time:%s\n", type_desc, av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &enc->time_base), av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &enc->time_base), av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &enc->time_base)); } e->data_size += pkt->size; e->packets_encoded++; ret = sch_enc_send(e->sch, e->sch_idx, pkt); if (ret < 0) { av_packet_unref(pkt); return ret; } } av_assert0(0); } static enum AVPictureType forced_kf_apply(void *logctx, KeyframeForceCtx *kf, const AVFrame *frame) { double pts_time; if (kf->ref_pts == AV_NOPTS_VALUE) kf->ref_pts = frame->pts; pts_time = (frame->pts - kf->ref_pts) * av_q2d(frame->time_base); if (kf->index < kf->nb_pts && av_compare_ts(frame->pts, frame->time_base, kf->pts[kf->index], AV_TIME_BASE_Q) >= 0) { kf->index++; goto force_keyframe; } else if (kf->pexpr) { double res; kf->expr_const_values[FKF_T] = pts_time; res = av_expr_eval(kf->pexpr, kf->expr_const_values, NULL); av_log(logctx, AV_LOG_TRACE, "force_key_frame: n:%f n_forced:%f prev_forced_n:%f t:%f prev_forced_t:%f -> res:%f\n", kf->expr_const_values[FKF_N], kf->expr_const_values[FKF_N_FORCED], kf->expr_const_values[FKF_PREV_FORCED_N], kf->expr_const_values[FKF_T], kf->expr_const_values[FKF_PREV_FORCED_T], res); kf->expr_const_values[FKF_N] += 1; if (res) { kf->expr_const_values[FKF_PREV_FORCED_N] = kf->expr_const_values[FKF_N] - 1; kf->expr_const_values[FKF_PREV_FORCED_T] = kf->expr_const_values[FKF_T]; kf->expr_const_values[FKF_N_FORCED] += 1; goto force_keyframe; } } else if (kf->type == KF_FORCE_SOURCE && (frame->flags & AV_FRAME_FLAG_KEY)) { goto force_keyframe; } return AV_PICTURE_TYPE_NONE; force_keyframe: av_log(logctx, AV_LOG_DEBUG, "Forced keyframe at time %f\n", pts_time); return AV_PICTURE_TYPE_I; } static int frame_encode(OutputStream *ost, AVFrame *frame, AVPacket *pkt) { OutputFile *of = ost->file; enum AVMediaType type = ost->type; if (type == AVMEDIA_TYPE_SUBTITLE) { const AVSubtitle *subtitle = frame && frame->buf[0] ? (AVSubtitle*)frame->buf[0]->data : NULL; // no flushing for subtitles return subtitle && subtitle->num_rects ? do_subtitle_out(of, ost, subtitle, pkt) : 0; } if (frame) { if (!check_recording_time(ost, frame->pts, frame->time_base)) return AVERROR_EOF; if (type == AVMEDIA_TYPE_VIDEO) { frame->quality = ost->enc_ctx->global_quality; frame->pict_type = forced_kf_apply(ost, &ost->kf, frame); #if FFMPEG_OPT_TOP if (ost->top_field_first >= 0) { frame->flags &= ~AV_FRAME_FLAG_TOP_FIELD_FIRST; frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST * (!!ost->top_field_first); } #endif } else { if (!(ost->enc_ctx->codec->capabilities & AV_CODEC_CAP_PARAM_CHANGE) && ost->enc_ctx->ch_layout.nb_channels != frame->ch_layout.nb_channels) { av_log(ost, AV_LOG_ERROR, "Audio channel count changed and encoder does not support parameter changes\n"); return 0; } } } return encode_frame(of, ost, frame, pkt); } static void enc_thread_set_name(const OutputStream *ost) { char name[16]; snprintf(name, sizeof(name), "enc%d:%d:%s", ost->file->index, ost->index, ost->enc_ctx->codec->name); ff_thread_setname(name); } static void enc_thread_uninit(EncoderThread *et) { av_packet_free(&et->pkt); av_frame_free(&et->frame); memset(et, 0, sizeof(*et)); } static int enc_thread_init(EncoderThread *et) { memset(et, 0, sizeof(*et)); et->frame = av_frame_alloc(); if (!et->frame) goto fail; et->pkt = av_packet_alloc(); if (!et->pkt) goto fail; return 0; fail: enc_thread_uninit(et); return AVERROR(ENOMEM); } int encoder_thread(void *arg) { OutputStream *ost = arg; Encoder *e = ost->enc; EncoderThread et; int ret = 0, input_status = 0; int name_set = 0; ret = enc_thread_init(&et); if (ret < 0) goto finish; /* Open the subtitle encoders immediately. AVFrame-based encoders * are opened through a callback from the scheduler once they get * their first frame * * N.B.: because the callback is called from a different thread, * enc_ctx MUST NOT be accessed before sch_enc_receive() returns * for the first time for audio/video. */ if (ost->type != AVMEDIA_TYPE_VIDEO && ost->type != AVMEDIA_TYPE_AUDIO) { ret = enc_open(ost, NULL); if (ret < 0) goto finish; } while (!input_status) { input_status = sch_enc_receive(e->sch, e->sch_idx, et.frame); if (input_status < 0) { if (input_status == AVERROR_EOF) { av_log(ost, AV_LOG_VERBOSE, "Encoder thread received EOF\n"); if (e->opened) break; av_log(ost, AV_LOG_ERROR, "Could not open encoder before EOF\n"); ret = AVERROR(EINVAL); } else { av_log(ost, AV_LOG_ERROR, "Error receiving a frame for encoding: %s\n", av_err2str(ret)); ret = input_status; } goto finish; } if (!name_set) { enc_thread_set_name(ost); name_set = 1; } ret = frame_encode(ost, et.frame, et.pkt); av_packet_unref(et.pkt); av_frame_unref(et.frame); if (ret < 0) { if (ret == AVERROR_EOF) av_log(ost, AV_LOG_VERBOSE, "Encoder returned EOF, finishing\n"); else av_log(ost, AV_LOG_ERROR, "Error encoding a frame: %s\n", av_err2str(ret)); break; } } // flush the encoder if (ret == 0 || ret == AVERROR_EOF) { ret = frame_encode(ost, NULL, et.pkt); if (ret < 0 && ret != AVERROR_EOF) av_log(ost, AV_LOG_ERROR, "Error flushing encoder: %s\n", av_err2str(ret)); } // EOF is normal thread termination if (ret == AVERROR_EOF) ret = 0; finish: enc_thread_uninit(&et); return ret; } int enc_loopback(Encoder *enc) { enc->attach_par = 1; return enc->sch_idx; }