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glvideomixer: Implement force-live and min-upstream-latency properties
Proxy the force-live and min-upstream-latency propertyies to the internal glvideomixerelement at construction time. force-live has to be set during construction of the glvideomixerelement, so that has to be deferred until the _constructed() call. Make sure that all other existing proxied properties will still get set once the element is created. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4494>
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4 changed files with 119 additions and 1 deletions
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@ -5546,6 +5546,18 @@
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"type": "GstGLContext",
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"writable": false
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},
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"force-live": {
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"blurb": "Always operate in live mode and aggregate on timeout regardless of whether any live sources are linked upstream",
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"conditionally-available": false,
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"construct": false,
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"construct-only": true,
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"controllable": false,
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"default": "false",
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"mutable": "null",
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"readable": true,
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"type": "gboolean",
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"writable": true
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},
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"latency": {
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"blurb": "Additional latency in live mode to allow upstream to take longer to produce buffers for the current position (in nanoseconds)",
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"conditionally-available": false,
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@ -5560,6 +5572,20 @@
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"type": "guint64",
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"writable": true
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},
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"min-upstream-latency": {
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"blurb": "When sources with a higher latency are expected to be plugged in dynamically after the aggregator has started playing, this allows overriding the minimum latency reported by the initial source(s). This is only taken into account when larger than the actually reported minimum latency. (nanoseconds)",
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"conditionally-available": false,
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"construct": false,
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"construct-only": false,
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"controllable": false,
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"default": "0",
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"max": "18446744073709551615",
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"min": "0",
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"mutable": "null",
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"readable": true,
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"type": "guint64",
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"writable": true
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},
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"mixer": {
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"blurb": "The GL mixer chain to use",
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"conditionally-available": false,
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@ -31,9 +31,11 @@
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#define GST_CAT_DEFAULT gst_gl_mixer_bin_debug
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GST_DEBUG_CATEGORY (gst_gl_mixer_bin_debug);
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#define DEFAULT_FORCE_LIVE FALSE
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#define DEFAULT_LATENCY 0
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#define DEFAULT_START_TIME_SELECTION 0
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#define DEFAULT_START_TIME (-1)
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#define DEFAULT_MIN_UPSTREAM_LATENCY (0)
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typedef enum
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{
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@ -124,6 +126,8 @@ enum
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PROP_START_TIME_SELECTION,
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PROP_START_TIME,
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PROP_CONTEXT,
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PROP_FORCE_LIVE,
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PROP_MIN_UPSTREAM_LATENCY,
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};
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enum
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@ -215,6 +219,44 @@ gst_gl_mixer_bin_class_init (GstGLMixerBinClass * klass)
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"Get OpenGL context",
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GST_TYPE_GL_CONTEXT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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/**
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* GstGLMixerBin:force-live:
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*
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* Causes the element to aggregate on a timeout even when no live source is
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* connected to its sinks. See #GstGLMixerBin:min-upstream-latency for a
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* companion property: in the vast majority of cases where you plan to plug in
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* live sources with a non-zero latency, you should set it to a non-zero value.
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*
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* Since: 1.24
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*/
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g_object_class_install_property (gobject_class, PROP_FORCE_LIVE,
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g_param_spec_boolean ("force-live",
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"Force Live",
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"Always operate in live mode and aggregate on timeout regardless of whether any live sources are linked upstream",
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DEFAULT_FORCE_LIVE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT_ONLY));
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/**
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* GstGLMixerBin:min-upstream-latency:
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*
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* Force minimum upstream latency (in nanoseconds). When sources with a
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* higher latency are expected to be plugged in dynamically after the
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* aggregator has started playing, this allows overriding the minimum
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* latency reported by the initial source(s). This is only taken into
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* account when larger than the actually reported minimum latency.
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*
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* Since: 1.24
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*/
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g_object_class_install_property (gobject_class, PROP_MIN_UPSTREAM_LATENCY,
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g_param_spec_uint64 ("min-upstream-latency", "Buffer latency",
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"When sources with a higher latency are expected to be plugged "
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"in dynamically after the aggregator has started playing, "
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"this allows overriding the minimum latency reported by the "
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"initial source(s). This is only taken into account when larger "
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"than the actually reported minimum latency. (nanoseconds)",
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0, G_MAXUINT64,
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DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstMixerBin::create-element:
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* @object: the #GstGLMixerBin
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@ -270,6 +312,12 @@ gst_gl_mixer_bin_init (GstGLMixerBin * self)
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if (!res)
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GST_ERROR_OBJECT (self, "failed to create output chain");
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self->force_live = DEFAULT_FORCE_LIVE;
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self->latency = DEFAULT_LATENCY;
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self->start_time_selection = DEFAULT_START_TIME_SELECTION;
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self->start_time = DEFAULT_START_TIME;
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self->min_upstream_latency = DEFAULT_MIN_UPSTREAM_LATENCY;
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}
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static void
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@ -448,6 +496,9 @@ gst_gl_mixer_bin_get_property (GObject * object,
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case PROP_MIXER:
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g_value_set_object (value, self->mixer);
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break;
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case PROP_FORCE_LIVE:
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g_value_set_boolean (value, self->force_live);
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break;
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default:
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if (self->mixer)
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g_object_get_property (G_OBJECT (self->mixer), pspec->name, value);
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@ -474,6 +525,29 @@ gst_gl_mixer_bin_set_property (GObject * object,
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}
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break;
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}
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case PROP_FORCE_LIVE:
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self->force_live = g_value_get_boolean (value);
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break;
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case PROP_LATENCY:
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self->latency = g_value_get_uint64 (value);
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if (self->mixer)
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g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
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break;
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case PROP_START_TIME_SELECTION:
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self->start_time_selection = g_value_get_uint (value);
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if (self->mixer)
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g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
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break;
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case PROP_START_TIME:
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self->start_time = g_value_get_uint64 (value);
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if (self->mixer)
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g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
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break;
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case PROP_MIN_UPSTREAM_LATENCY:
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self->min_upstream_latency = g_value_get_uint64 (value);
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if (self->mixer)
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g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
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break;
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default:
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if (self->mixer)
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g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
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@ -53,6 +53,13 @@ struct _GstGLMixerBin
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GstElement *download;
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GstPad *srcpad;
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gboolean force_live;
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GstClockTime latency;
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guint start_time_selection;
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GstClockTime start_time;
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GstClockTime min_upstream_latency;
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GstGLMixerBinPrivate *priv;
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};
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@ -563,11 +563,21 @@ GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (glvideomixer, "glvideomixer",
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static void
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gst_gl_video_mixer_bin_init (GstGLVideoMixerBin * self)
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{
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}
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static void
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gst_gl_video_mixer_bin_constructed (GObject * self)
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{
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GstGLMixerBin *mix_bin = GST_GL_MIXER_BIN (self);
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gst_gl_mixer_bin_finish_init_with_element (mix_bin,
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g_object_new (GST_TYPE_GL_VIDEO_MIXER, NULL));
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g_object_new (GST_TYPE_GL_VIDEO_MIXER,
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"force-live", mix_bin->force_live,
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"latency", mix_bin->latency,
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"start-time-selection", mix_bin->start_time_selection,
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"start-time", mix_bin->start_time,
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"min-upstream-latency", mix_bin->min_upstream_latency, NULL));
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}
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static void
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@ -580,6 +590,7 @@ gst_gl_video_mixer_bin_class_init (GstGLVideoMixerBinClass * klass)
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mixer_class->create_input_pad = _create_video_mixer_input;
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gobject_class->constructed = gst_gl_video_mixer_bin_constructed;
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gobject_class->set_property = gst_gl_video_mixer_bin_set_property;
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gobject_class->get_property = gst_gl_video_mixer_bin_get_property;
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