/* * Copyright (c) 2021 Paul B Mahol * * 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 "config_components.h" #include "audio.h"#include "avfilter.h"#include "filters.h"#include "video.h" typedef struct LatencyContext {    int64_t min_latency;    int64_t max_latency;    int64_t sum;} LatencyContext; static av_cold int init(AVFilterContext *ctx){    LatencyContext *s = ctx->priv;     s->min_latency = INT64_MAX;    s->max_latency = INT64_MIN;     return 0;} static int activate(AVFilterContext *ctx){    LatencyContext *s = ctx->priv;    AVFilterLink *inlink = ctx->inputs[0];    FilterLink      *inl = ff_filter_link(inlink);    AVFilterLink *outlink = ctx->outputs[0];     FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);     if (!ctx->is_disabled && ctx->inputs[0]->src &&        ctx->inputs[0]->src->nb_inputs > 0) {        AVFilterLink *prevlink = ctx->inputs[0]->src->inputs[0];        FilterLink *prevl = ff_filter_link(prevlink);        int64_t delta = 0;         switch (prevlink->type) {        case AVMEDIA_TYPE_AUDIO:            delta = prevl->sample_count_in - inl->sample_count_out;            break;        case AVMEDIA_TYPE_VIDEO:            delta = prevl->frame_count_in - inl->frame_count_out;            break;        }         if (delta > 0) {            s->min_latency = FFMIN(s->min_latency, delta);            s->max_latency = FFMAX(s->max_latency, delta);        }    }     if (ff_inlink_queued_frames(inlink)) {        AVFrame *frame = NULL;        int ret;         ret = ff_inlink_consume_frame(inlink, &frame);        if (ret < 0)            return ret;        if (ret > 0)            return ff_filter_frame(outlink, frame);    }     FF_FILTER_FORWARD_STATUS(inlink, outlink);    FF_FILTER_FORWARD_WANTED(outlink, inlink);     return FFERROR_NOT_READY;} static av_cold void uninit(AVFilterContext *ctx){    LatencyContext *s = ctx->priv;     if (s->min_latency != INT64_MAX)        av_log(ctx, AV_LOG_INFO, "Min latency: %"PRId64"\n", s->min_latency);    if (s->max_latency != INT64_MIN)        av_log(ctx, AV_LOG_INFO, "Max latency: %"PRId64"\n", s->max_latency);} #if CONFIG_LATENCY_FILTER const FFFilter ff_vf_latency = {    .p.name        = "latency",    .p.description = NULL_IF_CONFIG_SMALL("Report video filtering latency."),    .p.flags       = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |                     AVFILTER_FLAG_METADATA_ONLY,    .priv_size     = sizeof(LatencyContext),    .init          = init,    .uninit        = uninit,    .activate      = activate,    FILTER_INPUTS(ff_video_default_filterpad),    FILTER_OUTPUTS(ff_video_default_filterpad),}; #endif // CONFIG_LATENCY_FILTER #if CONFIG_ALATENCY_FILTER const FFFilter ff_af_alatency = {    .p.name        = "alatency",    .p.description = NULL_IF_CONFIG_SMALL("Report audio filtering latency."),    .p.flags       = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,    .priv_size     = sizeof(LatencyContext),    .init          = init,    .uninit        = uninit,    .activate      = activate,    FILTER_INPUTS(ff_audio_default_filterpad),    FILTER_OUTPUTS(ff_audio_default_filterpad),};#endif // CONFIG_ALATENCY_FILTER