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author | Paul B Mahol <onemda@gmail.com> | 2017-12-20 14:15:02 +0100 |
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committer | Paul B Mahol <onemda@gmail.com> | 2018-04-13 08:41:51 +0200 |
commit | 9e406326687b5342dc9caffd4f5f1b03ac4bf26b (patch) | |
tree | 7d5da8b310f3d147051d110f827ee4b42cb5eeea /libavfilter/vf_vfrdet.c | |
parent | 8d381b57fd9d17fb5c3a851ca46c738b3afc33a2 (diff) | |
download | ffmpeg-9e406326687b5342dc9caffd4f5f1b03ac4bf26b.tar.gz |
avfilter: add vfrdet filter
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Diffstat (limited to 'libavfilter/vf_vfrdet.c')
-rw-r--r-- | libavfilter/vf_vfrdet.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/libavfilter/vf_vfrdet.c b/libavfilter/vf_vfrdet.c new file mode 100644 index 0000000000..cac96e29a2 --- /dev/null +++ b/libavfilter/vf_vfrdet.c @@ -0,0 +1,111 @@ +/* + * Copyright (C) 2017 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 "libavutil/common.h" +#include "libavutil/opt.h" +#include "internal.h" + +typedef struct VFRDETContext { + const AVClass *class; + + int64_t prev_pts; + int64_t delta; + int64_t min_delta; + int64_t max_delta; + + uint64_t vfr; + uint64_t cfr; +} VFRDETContext; + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + AVFilterContext *ctx = inlink->dst; + VFRDETContext *s = ctx->priv; + + if (s->prev_pts != AV_NOPTS_VALUE) { + int64_t delta = in->pts - s->prev_pts; + + if (s->delta == AV_NOPTS_VALUE) { + s->delta = delta; + } + + if (s->delta != delta) { + s->vfr++; + s->delta = delta; + s->min_delta = FFMIN(delta, s->min_delta); + s->max_delta = FFMAX(delta, s->max_delta); + } else { + s->cfr++; + } + } + + s->prev_pts = in->pts; + + return ff_filter_frame(ctx->outputs[0], in); +} + +static av_cold int init(AVFilterContext *ctx) +{ + VFRDETContext *s = ctx->priv; + + s->prev_pts = AV_NOPTS_VALUE; + s->delta = AV_NOPTS_VALUE; + s->min_delta = INT64_MAX; + s->max_delta = INT64_MIN; + + return 0; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + VFRDETContext *s = ctx->priv; + + av_log(ctx, AV_LOG_INFO, "VFR:%f (%"PRIu64"/%"PRIu64")", s->vfr / (float)(s->vfr + s->cfr), s->vfr, s->cfr); + if (s->vfr) + av_log(ctx, AV_LOG_INFO, " min: %"PRId64" max: %"PRId64")", s->min_delta, s->max_delta); + av_log(ctx, AV_LOG_INFO, "\n"); +} + +static const AVFilterPad vfrdet_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + }, + { NULL } +}; + +static const AVFilterPad vfrdet_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter ff_vf_vfrdet = { + .name = "vfrdet", + .description = NULL_IF_CONFIG_SMALL("Variable frame rate detect filter."), + .priv_size = sizeof(VFRDETContext), + .init = init, + .uninit = uninit, + .inputs = vfrdet_inputs, + .outputs = vfrdet_outputs, +}; |