Signed-off-by: Paul B Mahol <one...@gmail.com>
---
libavfilter/Makefile | 2 +
libavfilter/allfilters.c | 2 +
libavfilter/f_latency.c | 171 +++++++++++++++++++++++++++++++++++++++
3 files changed, 175 insertions(+)
create mode 100644 libavfilter/f_latency.c
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 8031f59af5..d12f7dc3a5 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -60,6 +60,7 @@ OBJS-$(CONFIG_AGATE_FILTER) += af_agate.o
OBJS-$(CONFIG_AIIR_FILTER) += af_aiir.o
OBJS-$(CONFIG_AINTEGRAL_FILTER) += af_aderivative.o
OBJS-$(CONFIG_AINTERLEAVE_FILTER) += f_interleave.o
+OBJS-$(CONFIG_ALATENCY_FILTER) += f_latency.o
OBJS-$(CONFIG_ALIMITER_FILTER) += af_alimiter.o
OBJS-$(CONFIG_ALLPASS_FILTER) += af_biquads.o
OBJS-$(CONFIG_ALOOP_FILTER) += f_loop.o
@@ -317,6 +318,7 @@ OBJS-$(CONFIG_INTERLEAVE_FILTER) +=
f_interleave.o
OBJS-$(CONFIG_KERNDEINT_FILTER) += vf_kerndeint.o
OBJS-$(CONFIG_KIRSCH_FILTER) += vf_convolution.o
OBJS-$(CONFIG_LAGFUN_FILTER) += vf_lagfun.o
+OBJS-$(CONFIG_LATENCY_FILTER) += f_latency.o
OBJS-$(CONFIG_LENSCORRECTION_FILTER) += vf_lenscorrection.o
OBJS-$(CONFIG_LENSFUN_FILTER) += vf_lensfun.o
OBJS-$(CONFIG_LIBVMAF_FILTER) += vf_libvmaf.o framesync.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index e1e43726b5..e809d3b7c4 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -53,6 +53,7 @@ extern const AVFilter ff_af_agate;
extern const AVFilter ff_af_aiir;
extern const AVFilter ff_af_aintegral;
extern const AVFilter ff_af_ainterleave;
+extern const AVFilter ff_af_alatency;
extern const AVFilter ff_af_alimiter;
extern const AVFilter ff_af_allpass;
extern const AVFilter ff_af_aloop;
@@ -302,6 +303,7 @@ extern const AVFilter ff_vf_interleave;
extern const AVFilter ff_vf_kerndeint;
extern const AVFilter ff_vf_kirsch;
extern const AVFilter ff_vf_lagfun;
+extern const AVFilter ff_vf_latency;
extern const AVFilter ff_vf_lenscorrection;
extern const AVFilter ff_vf_lensfun;
extern const AVFilter ff_vf_libvmaf;
diff --git a/libavfilter/f_latency.c b/libavfilter/f_latency.c
new file mode 100644
index 0000000000..324040922f
--- /dev/null
+++ b/libavfilter/f_latency.c
@@ -0,0 +1,171 @@
+/*
+ * 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 "libavutil/opt.h"
+#include "avfilter.h"
+#include "filters.h"
+#include "formats.h"
+#include "internal.h"
+
+typedef struct LatencyContext {
+ const AVClass *class;
+
+ int64_t min_latency;
+ int64_t max_latency;
+ int64_t sum;
+} LatencyContext;
+
+#define OFFSET(x) offsetof(LatencyContext, x)
+#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption latency_options[] = {
+ { NULL }
+};
+
+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];
+ AVFilterLink *outlink = ctx->outputs[0];
+
+ FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
+
+ if (ctx->inputs[0]->src &&
+ ctx->inputs[0]->src->nb_inputs > 0) {
+ AVFilterLink *prevlink = ctx->inputs[0]->src->inputs[0];
+ int64_t delta = 0;
+
+ switch (prevlink->type) {
+ case AVMEDIA_TYPE_AUDIO:
+ delta = prevlink->sample_count_in - inlink->sample_count_out;
+ break;
+ case AVMEDIA_TYPE_VIDEO:
+ delta = prevlink->frame_count_in - inlink->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
+
+AVFILTER_DEFINE_CLASS(latency);
+
+static const AVFilterPad latency_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+};
+
+static const AVFilterPad latency_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+};
+
+const AVFilter ff_vf_latency = {
+ .name = "latency",
+ .description = NULL_IF_CONFIG_SMALL("Report video filtering latency."),
+ .priv_size = sizeof(LatencyContext),
+ .priv_class = &latency_class,
+ .init = init,
+ .uninit = uninit,
+ .activate = activate,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE,
+ FILTER_INPUTS(latency_inputs),
+ FILTER_OUTPUTS(latency_outputs),
+};
+
+#endif // CONFIG_LATENCY_FILTER
+
+#if CONFIG_ALATENCY_FILTER
+
+#define alatency_options latency_options
+AVFILTER_DEFINE_CLASS(alatency);
+
+static const AVFilterPad alatency_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_AUDIO,
+ },
+};
+
+static const AVFilterPad alatency_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_AUDIO,
+ },
+};
+
+const AVFilter ff_af_alatency = {
+ .name = "alatency",
+ .description = NULL_IF_CONFIG_SMALL("Report audio filtering latency."),
+ .priv_size = sizeof(LatencyContext),
+ .priv_class = &alatency_class,
+ .init = init,
+ .uninit = uninit,
+ .activate = activate,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE,
+ FILTER_INPUTS(alatency_inputs),
+ FILTER_OUTPUTS(alatency_outputs),
+};
+#endif // CONFIG_ALATENCY_FILTER
--
2.17.1
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