gst-plugins-good: add audio-level-meta to cutter

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5749

gvsbuild/patches/gst-plugins-good/cutter-add-audio-level-meta.patch

@@ -0,0 +1,131 @@
+From e7d5f3bfadc656cb0ed5f4f821df178a559ec395 Mon Sep 17 00:00:00 2001
+From: Ignazio Pillai <ignazp@amazon.com>
+Date: Fri, 1 Dec 2023 14:49:37 +0100
+Subject: [PATCH] cutter: add audio-level-meta
+
+Set GstAudioLevelMeta on buffers
+---
+ .../gst/cutter/gstcutter.c | 45 ++++++++++++++++++-
+ .../gst/cutter/gstcutter.h | 1 +
+ 2 files changed, 45 insertions(+), 1 deletion(-)
+
+diff --git a/gst/cutter/gstcutter.c b/gst/cutter/gstcutter.c
+index 760a9c9d91..633c77fd46 100644
+--- a/gst/cutter/gstcutter.c
++++ b/gst/cutter/gstcutter.c
+@@ -54,6 +54,7 @@ GST_DEBUG_CATEGORY_STATIC (cutter_debug);
+ #define CUTTER_DEFAULT_THRESHOLD_LEVEL 0.1
+ #define CUTTER_DEFAULT_THRESHOLD_LENGTH (500 * GST_MSECOND)
+ #define CUTTER_DEFAULT_PRE_LENGTH (200 * GST_MSECOND)
++#define EPSILON 1e-35f
+
+ static GstStaticPadTemplate cutter_src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+@@ -81,7 +82,8 @@ enum
+ PROP_THRESHOLD_DB,
+ PROP_RUN_LENGTH,
+ PROP_PRE_LENGTH,
+- PROP_LEAKY
++ PROP_LEAKY,
++ PROP_AUDIO_LEVEL_META,
+ };
+
+ #define gst_cutter_parent_class parent_class
+@@ -135,6 +137,17 @@ gst_cutter_class_init (GstCutterClass * klass)
+ g_param_spec_boolean ("leaky", "Leaky",
+ "do we leak buffers when below threshold ?",
+ FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
++ /**
++ * GstLevel:audio-level-meta:
++ *
++ * If %TRUE, generate or update GstAudioLevelMeta on output buffers.
++ *
++ * Since: 1.24
++ */
++ g_object_class_install_property (gobject_class, PROP_AUDIO_LEVEL_META,
++ g_param_spec_boolean ("audio-level-meta", "Audio Level Meta",
++ "Set GstAudioLevelMeta on buffers", FALSE,
++ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ GST_DEBUG_CATEGORY_INIT (cutter_debug, "cutter", 0, "Audio cutting");
+
+@@ -175,6 +188,7 @@ gst_cutter_init (GstCutter * filter)
+ filter->pre_run_length = 0 * GST_SECOND;
+ filter->pre_buffer = NULL;
+ filter->leaky = FALSE;
++ filter->audio_level_meta = FALSE;
+ }
+
+ static GstMessage *
+@@ -293,6 +307,23 @@ gst_cutter_event (GstPad * pad, GstObject * parent, GstEvent * event)
+ return ret;
+ }
+
++static void
++set_audio_level_meta (GstBuffer * buffer, guint8 level)
++{
++ GstAudioLevelMeta *meta;
++
++ /* Update the existing meta, if any, so we can have an upstream element
++ * filling the voice activity part of the meta. */
++ meta = gst_buffer_get_audio_level_meta (buffer);
++ if (meta) {
++ meta->level = level;
++ } else {
++ /* Assume audio does not contain voice, it can be detected by another
++ * downstream element. */
++ gst_buffer_add_audio_level_meta (buffer, level, FALSE);
++ }
++}
++
+ static GstFlowReturn
+ gst_cutter_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
+ {
+@@ -355,6 +386,12 @@ gst_cutter_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
+ GST_LOG_OBJECT (filter, "buffer stats: NMS %f, RMS %f, audio length %f", NMS,
+ RMS, gst_guint64_to_gdouble (duration));
+
++ if (filter->audio_level_meta) {
++ gdouble RMSdB = 20 * log10 (RMS + EPSILON);
++
++ set_audio_level_meta (buf, -RMSdB);
++ }
++
+ if (RMS < filter->threshold_level)
+ filter->silent_run_length += gst_guint64_to_gdouble (duration);
+ else {
+@@ -469,6 +506,9 @@ gst_cutter_set_property (GObject * object, guint prop_id,
+ /* set if the pre-record buffer is leaky or not */
+ filter->leaky = g_value_get_boolean (value);
+ break;
++ case PROP_AUDIO_LEVEL_META:
++ filter->audio_level_meta = g_value_get_boolean (value);
++ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+@@ -500,6 +540,9 @@ gst_cutter_get_property (GObject * object, guint prop_id,
+ case PROP_LEAKY:
+ g_value_set_boolean (value, filter->leaky);
+ break;
++ case PROP_AUDIO_LEVEL_META:
++ g_value_set_boolean (value, filter->audio_level_meta);
++ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+diff --git a/gst/cutter/gstcutter.h b/gst/cutter/gstcutter.h
+index 3167cea007..d00de4d9f6 100644
+--- a/gst/cutter/gstcutter.h
++++ b/gst/cutter/gstcutter.h
+@@ -62,6 +62,7 @@ struct _GstCutter
+ double pre_run_length; /* how long is it currently ? */
+ GList *pre_buffer; /* list of GstBuffers in pre-record buffer */
+ gboolean leaky; /* do we leak an overflowing prebuffer ? */
++ gboolean audio_level_meta; /* whether or not generate GstAudioLevelMeta */
+
+ GstAudioInfo info;
+ GstSegment segment;
+-- 
+2.38.1.windows.1
+

gvsbuild/projects/gstreamer.py

@@ -137,6 +137,9 @@ def __init__(self):
  "gst-plugins-base",
  "libvpx",
  ],
+ patches=[
+ "cutter-add-audio-level-meta.patch",
+ ],
  )
 
  def build(self):