mirror of
https://github.com/FFmpeg/FFmpeg.git
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220 lines
8.0 KiB
C
220 lines
8.0 KiB
C
/*
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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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/**
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* @file
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* video freeze detection filter
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*/
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#include "libavutil/imgutils.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/timestamp.h"
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#include "avfilter.h"
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#include "filters.h"
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#include "scene_sad.h"
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#include "video.h"
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typedef struct FreezeDetectContext {
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const AVClass *class;
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ptrdiff_t width[4];
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ptrdiff_t height[4];
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ff_scene_sad_fn sad;
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int bitdepth;
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AVFrame *reference_frame;
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int64_t n;
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int64_t reference_n;
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int frozen;
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double noise;
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int64_t duration; ///< minimum duration of frozen frame until notification
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} FreezeDetectContext;
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#define OFFSET(x) offsetof(FreezeDetectContext, x)
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#define V AV_OPT_FLAG_VIDEO_PARAM
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#define F AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption freezedetect_options[] = {
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{ "n", "set noise tolerance", OFFSET(noise), AV_OPT_TYPE_DOUBLE, {.dbl=0.001}, 0, 1.0, V|F },
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{ "noise", "set noise tolerance", OFFSET(noise), AV_OPT_TYPE_DOUBLE, {.dbl=0.001}, 0, 1.0, V|F },
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{ "d", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, INT64_MAX, V|F },
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{ "duration", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, INT64_MAX, V|F },
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{NULL}
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};
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AVFILTER_DEFINE_CLASS(freezedetect);
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUYV422, AV_PIX_FMT_RGB24,
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AV_PIX_FMT_BGR24, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_GRAY8,
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AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
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AV_PIX_FMT_UYVY422, AV_PIX_FMT_NV12, AV_PIX_FMT_NV21, AV_PIX_FMT_ARGB,
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AV_PIX_FMT_RGBA, AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA, AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVA420P,
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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AV_PIX_FMT_YA8, AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV420P10,
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AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10,
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AV_PIX_FMT_YUV422P9, AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9,
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AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP16, AV_PIX_FMT_YUVA422P,
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9,
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AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10,
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AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16,
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AV_PIX_FMT_YUVA444P16, AV_PIX_FMT_NV16, AV_PIX_FMT_YVYU422,
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AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP16, AV_PIX_FMT_YUV420P12,
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AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV422P14,
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AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_GBRP12,
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AV_PIX_FMT_GBRP14, AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV440P10,
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AV_PIX_FMT_YUV440P12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP10,
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AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY9,
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AV_PIX_FMT_GRAY14,
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AV_PIX_FMT_NONE
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};
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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FreezeDetectContext *s = ctx->priv;
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const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
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s->bitdepth = pix_desc->comp[0].depth;
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for (int plane = 0; plane < 4; plane++) {
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ptrdiff_t line_size = av_image_get_linesize(inlink->format, inlink->w, plane);
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s->width[plane] = line_size >> (s->bitdepth > 8);
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s->height[plane] = inlink->h >> ((plane == 1 || plane == 2) ? pix_desc->log2_chroma_h : 0);
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}
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s->sad = ff_scene_sad_get_fn(s->bitdepth == 8 ? 8 : 16);
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if (!s->sad)
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return AVERROR(EINVAL);
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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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FreezeDetectContext *s = ctx->priv;
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av_frame_free(&s->reference_frame);
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}
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static int is_frozen(FreezeDetectContext *s, AVFrame *reference, AVFrame *frame)
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{
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uint64_t sad = 0;
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uint64_t count = 0;
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double mafd;
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for (int plane = 0; plane < 4; plane++) {
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if (s->width[plane]) {
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uint64_t plane_sad;
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s->sad(frame->data[plane], frame->linesize[plane],
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reference->data[plane], reference->linesize[plane],
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s->width[plane], s->height[plane], &plane_sad);
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sad += plane_sad;
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count += s->width[plane] * s->height[plane];
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}
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}
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mafd = (double)sad / count / (1ULL << s->bitdepth);
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return (mafd <= s->noise);
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}
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static int set_meta(FreezeDetectContext *s, AVFrame *frame, const char *key, const char *value)
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{
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av_log(s, AV_LOG_INFO, "%s: %s\n", key, value);
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return av_dict_set(&frame->metadata, key, value, 0);
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}
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static int activate(AVFilterContext *ctx)
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{
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int ret;
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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FilterLink *l = ff_filter_link(inlink);
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FreezeDetectContext *s = ctx->priv;
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AVFrame *frame;
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FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
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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 (frame) {
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int frozen = 0;
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s->n++;
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if (s->reference_frame) {
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int64_t duration;
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if (s->reference_frame->pts == AV_NOPTS_VALUE || frame->pts == AV_NOPTS_VALUE || frame->pts < s->reference_frame->pts) // Discontinuity?
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duration = l->frame_rate.num > 0 ? av_rescale_q(s->n - s->reference_n, av_inv_q(l->frame_rate), AV_TIME_BASE_Q) : 0;
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else
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duration = av_rescale_q(frame->pts - s->reference_frame->pts, inlink->time_base, AV_TIME_BASE_Q);
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frozen = is_frozen(s, s->reference_frame, frame);
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if (duration >= s->duration) {
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if (!s->frozen)
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set_meta(s, frame, "lavfi.freezedetect.freeze_start", av_ts2timestr(s->reference_frame->pts, &inlink->time_base));
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if (!frozen) {
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set_meta(s, frame, "lavfi.freezedetect.freeze_duration", av_ts2timestr(duration, &AV_TIME_BASE_Q));
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set_meta(s, frame, "lavfi.freezedetect.freeze_end", av_ts2timestr(frame->pts, &inlink->time_base));
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}
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s->frozen = frozen;
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}
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}
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if (!frozen) {
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av_frame_free(&s->reference_frame);
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s->reference_frame = av_frame_clone(frame);
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s->reference_n = s->n;
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if (!s->reference_frame) {
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av_frame_free(&frame);
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return AVERROR(ENOMEM);
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}
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}
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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 const AVFilterPad freezedetect_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_input,
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},
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};
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const AVFilter ff_vf_freezedetect = {
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.name = "freezedetect",
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.description = NULL_IF_CONFIG_SMALL("Detects frozen video input."),
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.priv_size = sizeof(FreezeDetectContext),
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.priv_class = &freezedetect_class,
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.uninit = uninit,
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.flags = AVFILTER_FLAG_METADATA_ONLY,
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FILTER_INPUTS(freezedetect_inputs),
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FILTER_OUTPUTS(ff_video_default_filterpad),
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FILTER_PIXFMTS_ARRAY(pix_fmts),
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.activate = activate,
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};
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