mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2026-11-06 05:17:42 +00:00
Michael Niedermayer
58892c922e
These filters never access pixel data based on the size or format of their input link, so frames that change size or format after the graph was configured pass through them unharmed. Marking them keeps the common -reinit_filter 0 chains working. Found during triage of the security report RqgTntCAW2qN.
133 lines
3.9 KiB
C
133 lines
3.9 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 "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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FilterLink *inl = ff_filter_link(inlink);
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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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FilterLink *prevl = ff_filter_link(prevlink);
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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 = prevl->sample_count_in - inl->sample_count_out;
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break;
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case AVMEDIA_TYPE_VIDEO:
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delta = prevl->frame_count_in - inl->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 FFFilter ff_vf_latency = {
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.p.name = "latency",
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.p.description = NULL_IF_CONFIG_SMALL("Report video filtering latency."),
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.p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
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AVFILTER_FLAG_METADATA_ONLY,
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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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FILTER_INPUTS(ff_video_default_filterpad),
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FILTER_OUTPUTS(ff_video_default_filterpad),
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.flags_internal = FF_FILTER_FLAG_DYNAMIC_FRAME_PARAMS,
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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 FFFilter ff_af_alatency = {
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.p.name = "alatency",
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.p.description = NULL_IF_CONFIG_SMALL("Report audio filtering latency."),
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.p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
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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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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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