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109 lines
3.0 KiB
109 lines
3.0 KiB
/* |
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* Copyright (C) 2017 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 "libavutil/common.h" |
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#include "libavutil/opt.h" |
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#include "filters.h" |
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#include "video.h" |
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typedef struct VFRDETContext { |
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const AVClass *class; |
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int64_t prev_pts; |
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int64_t delta; |
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int64_t min_delta; |
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int64_t max_delta; |
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int64_t avg_delta; |
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uint64_t vfr; |
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uint64_t cfr; |
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} VFRDETContext; |
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static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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VFRDETContext *s = ctx->priv; |
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if (s->prev_pts != AV_NOPTS_VALUE) { |
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int64_t delta = in->pts - s->prev_pts; |
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if (s->delta == AV_NOPTS_VALUE) { |
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s->delta = delta; |
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s->min_delta = delta; |
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s->max_delta = delta; |
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} |
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if (s->delta != delta) { |
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s->vfr++; |
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s->delta = delta; |
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s->min_delta = FFMIN(delta, s->min_delta); |
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s->max_delta = FFMAX(delta, s->max_delta); |
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s->avg_delta += delta; |
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} else { |
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s->cfr++; |
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} |
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} |
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s->prev_pts = in->pts; |
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return ff_filter_frame(ctx->outputs[0], in); |
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} |
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static av_cold int init(AVFilterContext *ctx) |
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{ |
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VFRDETContext *s = ctx->priv; |
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s->prev_pts = AV_NOPTS_VALUE; |
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s->delta = AV_NOPTS_VALUE; |
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s->min_delta = INT64_MAX; |
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s->max_delta = INT64_MIN; |
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return 0; |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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VFRDETContext *s = ctx->priv; |
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av_log(ctx, AV_LOG_INFO, "VFR:%f (%"PRIu64"/%"PRIu64")", s->vfr / (float)(s->vfr + s->cfr), s->vfr, s->cfr); |
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if (s->vfr) |
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av_log(ctx, AV_LOG_INFO, " min: %"PRId64" max: %"PRId64" avg: %"PRId64, s->min_delta, s->max_delta, s->avg_delta / s->vfr); |
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av_log(ctx, AV_LOG_INFO, "\n"); |
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} |
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static const AVFilterPad vfrdet_inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.filter_frame = filter_frame, |
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}, |
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}; |
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const AVFilter ff_vf_vfrdet = { |
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.name = "vfrdet", |
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.description = NULL_IF_CONFIG_SMALL("Variable frame rate detect filter."), |
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.priv_size = sizeof(VFRDETContext), |
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.init = init, |
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.uninit = uninit, |
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.flags = AVFILTER_FLAG_METADATA_ONLY, |
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FILTER_INPUTS(vfrdet_inputs), |
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FILTER_OUTPUTS(ff_video_default_filterpad), |
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};
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