| /* |
| * Copyright (c) 2015 Nicolas George |
| * |
| * 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 "libavutil/time.h" |
| #include "avfilter.h" |
| #include "internal.h" |
| |
| typedef struct RealtimeContext { |
| const AVClass *class; |
| int64_t delta; |
| int64_t limit; |
| unsigned inited; |
| } RealtimeContext; |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| RealtimeContext *s = ctx->priv; |
| |
| if (frame->pts != AV_NOPTS_VALUE) { |
| int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q); |
| int64_t now = av_gettime_relative(); |
| int64_t sleep = pts - now + s->delta; |
| if (!s->inited) { |
| s->inited = 1; |
| sleep = 0; |
| s->delta = now - pts; |
| } |
| if (sleep > s->limit || sleep < -s->limit) { |
| av_log(ctx, AV_LOG_WARNING, |
| "time discontinuity detected: %"PRIi64" us, resetting\n", |
| sleep); |
| sleep = 0; |
| s->delta = now - pts; |
| } |
| if (sleep > 0) { |
| av_log(ctx, AV_LOG_DEBUG, "sleeping %"PRIi64" us\n", sleep); |
| for (; sleep > 600000000; sleep -= 600000000) |
| av_usleep(600000000); |
| av_usleep(sleep); |
| } |
| } |
| return ff_filter_frame(inlink->dst->outputs[0], frame); |
| } |
| |
| #define OFFSET(x) offsetof(RealtimeContext, x) |
| #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
| static const AVOption options[] = { |
| { "limit", "sleep time limit", OFFSET(limit), AV_OPT_TYPE_DURATION, { .i64 = 2000000 }, 0, INT64_MAX, FLAGS }, |
| { NULL } |
| }; |
| |
| #if CONFIG_REALTIME_FILTER |
| #define realtime_options options |
| AVFILTER_DEFINE_CLASS(realtime); |
| |
| static const AVFilterPad avfilter_vf_realtime_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad avfilter_vf_realtime_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_realtime = { |
| .name = "realtime", |
| .description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime."), |
| .priv_size = sizeof(RealtimeContext), |
| .priv_class = &realtime_class, |
| .inputs = avfilter_vf_realtime_inputs, |
| .outputs = avfilter_vf_realtime_outputs, |
| }; |
| #endif /* CONFIG_REALTIME_FILTER */ |
| |
| #if CONFIG_AREALTIME_FILTER |
| |
| #define arealtime_options options |
| AVFILTER_DEFINE_CLASS(arealtime); |
| |
| static const AVFilterPad arealtime_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad arealtime_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_af_arealtime = { |
| .name = "arealtime", |
| .description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime."), |
| .priv_size = sizeof(RealtimeContext), |
| .priv_class = &arealtime_class, |
| .inputs = arealtime_inputs, |
| .outputs = arealtime_outputs, |
| }; |
| #endif /* CONFIG_AREALTIME_FILTER */ |