lavfi: add bench and abench filters

1 files changed, 151 insertions, 0 deletions

diff --git a/libavfilter/f_bench.c b/libavfilter/f_bench.c
new file mode 100644
index 0000000..b2eff2c
--- /dev/null
+++ b/libavfilter/f_bench.c
@@ -0,0 +1,151 @@
+/*
+ * 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 "libavutil/time.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+
+enum BenchAction {
+    ACTION_START,
+    ACTION_STOP,
+    NB_ACTION
+};
+
+typedef struct {
+    const AVClass *class;
+    int action;
+    int64_t max, min;
+    int64_t sum;
+    int n;
+} BenchContext;
+
+#define OFFSET(x) offsetof(BenchContext, x)
+#define DEFINE_OPTIONS(filt_name, FLAGS)                                                                                \
+static const AVOption filt_name##_options[] = {                                                                         \
+    { "action", "set action", OFFSET(action), AV_OPT_TYPE_INT, {.i64=ACTION_START}, 0, NB_ACTION-1, FLAGS, "action" },  \
+        { "start", "start timer",  0, AV_OPT_TYPE_CONST, {.i64=ACTION_START}, INT_MIN, INT_MAX, FLAGS, "action" },      \
+        { "stop",  "stop timer",   0, AV_OPT_TYPE_CONST, {.i64=ACTION_STOP},  INT_MIN, INT_MAX, FLAGS, "action" },      \
+    { NULL }                                                                                                            \
+}
+
+#define START_TIME_KEY "lavfi.bench.start_time"
+#define T2F(v) ((v) / 1000000.)
+
+static av_cold int init(AVFilterContext *ctx)
+{
+    BenchContext *s = ctx->priv;
+    s->min = INT64_MAX;
+    s->max = INT64_MIN;
+    return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+    AVFilterContext *ctx = inlink->dst;
+    BenchContext *s = ctx->priv;
+    AVFilterLink *outlink = ctx->outputs[0];
+    const int64_t t = av_gettime();
+
+    if (t < 0)
+        return ff_filter_frame(outlink, in);
+
+    if (s->action == ACTION_START) {
+        av_dict_set_int(&in->metadata, START_TIME_KEY, t, 0);
+    } else if (s->action = ACTION_STOP) {
+        AVDictionaryEntry *e = av_dict_get(in->metadata, START_TIME_KEY, NULL, 0);
+        if (e) {
+            const int64_t start = strtoll(e->value, NULL, 0);
+            const int64_t diff = t - start;
+            s->sum += diff;
+            s->n++;
+            s->min = FFMIN(s->min, diff);
+            s->max = FFMAX(s->max, diff);
+            av_log(s, AV_LOG_INFO, "t:%f avg:%f max:%f min:%f\n",
+                   T2F(diff), T2F(s->sum / s->n), T2F(s->max), T2F(s->min));
+        }
+        av_dict_set(&in->metadata, START_TIME_KEY, NULL, 0);
+    }
+
+    return ff_filter_frame(outlink, in);
+}
+
+#if CONFIG_BENCH_FILTER
+DEFINE_OPTIONS(bench, AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM);
+AVFILTER_DEFINE_CLASS(bench);
+
+static const AVFilterPad bench_inputs[] = {
+    {
+        .name         = "default",
+        .type         = AVMEDIA_TYPE_VIDEO,
+        .filter_frame = filter_frame,
+    },
+    { NULL }
+};
+
+static const AVFilterPad bench_outputs[] = {
+    {
+        .name = "default",
+        .type = AVMEDIA_TYPE_VIDEO,
+    },
+    { NULL }
+};
+
+AVFilter ff_vf_bench = {
+    .name          = "bench",
+    .description   = NULL_IF_CONFIG_SMALL("Benchmark part of a filtergraph."),
+    .priv_size     = sizeof(BenchContext),
+    .init          = init,
+    .inputs        = bench_inputs,
+    .outputs       = bench_outputs,
+    .priv_class    = &bench_class,
+};
+#endif /* CONFIG_BENCH_FILTER */
+
+#if CONFIG_ABENCH_FILTER
+DEFINE_OPTIONS(abench, AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM);
+AVFILTER_DEFINE_CLASS(abench);
+
+static const AVFilterPad abench_inputs[] = {
+    {
+        .name         = "default",
+        .type         = AVMEDIA_TYPE_AUDIO,
+        .filter_frame = filter_frame,
+    },
+    { NULL }
+};
+
+static const AVFilterPad abench_outputs[] = {
+    {
+        .name = "default",
+        .type = AVMEDIA_TYPE_AUDIO,
+    },
+    { NULL }
+};
+
+AVFilter ff_af_abench = {
+    .name          = "abench",
+    .description   = NULL_IF_CONFIG_SMALL("Benchmark part of a filtergraph."),
+    .priv_size     = sizeof(BenchContext),
+    .init          = init,
+    .inputs        = abench_inputs,
+    .outputs       = abench_outputs,
+    .priv_class    = &abench_class,
+};
+#endif /* CONFIG_ABENCH_FILTER */