mirror of https://git.videolan.org/git/ffmpeg.git
131 lines
3.8 KiB
C
131 lines
3.8 KiB
C
/*
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* Copyright (c) 2021 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config_components.h"
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#include "audio.h"
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#include "avfilter.h"
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#include "filters.h"
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#include "internal.h"
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#include "video.h"
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typedef struct LatencyContext {
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int64_t min_latency;
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int64_t max_latency;
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int64_t sum;
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} LatencyContext;
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static av_cold int init(AVFilterContext *ctx)
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{
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LatencyContext *s = ctx->priv;
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s->min_latency = INT64_MAX;
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s->max_latency = INT64_MIN;
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return 0;
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}
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static int activate(AVFilterContext *ctx)
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{
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LatencyContext *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
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if (!ctx->is_disabled && ctx->inputs[0]->src &&
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ctx->inputs[0]->src->nb_inputs > 0) {
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AVFilterLink *prevlink = ctx->inputs[0]->src->inputs[0];
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int64_t delta = 0;
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switch (prevlink->type) {
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case AVMEDIA_TYPE_AUDIO:
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delta = prevlink->sample_count_in - inlink->sample_count_out;
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break;
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case AVMEDIA_TYPE_VIDEO:
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delta = prevlink->frame_count_in - inlink->frame_count_out;
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break;
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}
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if (delta > 0) {
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s->min_latency = FFMIN(s->min_latency, delta);
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s->max_latency = FFMAX(s->max_latency, delta);
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}
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}
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if (ff_inlink_queued_frames(inlink)) {
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AVFrame *frame = NULL;
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int ret;
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ret = ff_inlink_consume_frame(inlink, &frame);
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if (ret < 0)
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return ret;
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if (ret > 0)
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return ff_filter_frame(outlink, frame);
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}
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FF_FILTER_FORWARD_STATUS(inlink, outlink);
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FF_FILTER_FORWARD_WANTED(outlink, inlink);
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return FFERROR_NOT_READY;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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LatencyContext *s = ctx->priv;
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if (s->min_latency != INT64_MAX)
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av_log(ctx, AV_LOG_INFO, "Min latency: %"PRId64"\n", s->min_latency);
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if (s->max_latency != INT64_MIN)
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av_log(ctx, AV_LOG_INFO, "Max latency: %"PRId64"\n", s->max_latency);
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}
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#if CONFIG_LATENCY_FILTER
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const AVFilter ff_vf_latency = {
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.name = "latency",
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.description = NULL_IF_CONFIG_SMALL("Report video filtering latency."),
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.priv_size = sizeof(LatencyContext),
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.init = init,
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.uninit = uninit,
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.activate = activate,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
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AVFILTER_FLAG_METADATA_ONLY,
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FILTER_INPUTS(ff_video_default_filterpad),
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FILTER_OUTPUTS(ff_video_default_filterpad),
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};
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#endif // CONFIG_LATENCY_FILTER
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#if CONFIG_ALATENCY_FILTER
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const AVFilter ff_af_alatency = {
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.name = "alatency",
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.description = NULL_IF_CONFIG_SMALL("Report audio filtering latency."),
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.priv_size = sizeof(LatencyContext),
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.init = init,
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.uninit = uninit,
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.activate = activate,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
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FILTER_INPUTS(ff_audio_default_filterpad),
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FILTER_OUTPUTS(ff_audio_default_filterpad),
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};
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#endif // CONFIG_ALATENCY_FILTER
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