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playsink: Hold a reference to the soft volume element

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Always hold a reference to the soft volume element
provided by the playsinkaudioconvert bin helper, the
same as when volume is provided by a sink element,
or the soft volume element gets unreffed too soon.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3113>
This commit is contained in:
Jan Schmidt 2022-10-01 02:33:49 +10:00 committed by Tim-Philipp Müller
parent 4ab71ca3f1
commit 4332635d9e
3 changed files with 33 additions and 21 deletions
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43
subprojects/gst-plugins-base/gst/playback/gstplaysink.c
View file

@ -2866,11 +2866,9 @@ gen_audio_chain (GstPlaySink * playsink, gboolean raw)
prev = chain->conv;
if (!have_volume && (playsink->flags & GST_PLAY_FLAG_SOFT_VOLUME)) {
GstPlaySinkAudioConvert *conv =
GST_PLAY_SINK_AUDIO_CONVERT_CAST (chain->conv);
g_object_get (chain->conv, "volume-element", &chain->volume, NULL);
if (conv->volume) {
chain->volume = conv->volume;
if (chain->volume) {
have_volume = TRUE;
chain->notify_volume_id =
@ -2981,10 +2979,8 @@ setup_audio_chain (GstPlaySink * playsink, gboolean raw)
GstElement *elem;
GstPlayAudioChain *chain;
GstStateChangeReturn ret;
GstPlaySinkAudioConvert *conv;
chain = playsink->audiochain;
conv = GST_PLAY_SINK_AUDIO_CONVERT_CAST (chain->conv);
/* if we have a filter, and raw-ness changed, we have to force a rebuild */
if (chain->filter && chain->chain.raw != raw)
@ -3008,6 +3004,11 @@ setup_audio_chain (GstPlaySink * playsink, gboolean raw)
/* Disconnect signals */
disconnect_audio_chain (chain, playsink);
/* Drop any existing volume handler and check again */
if (chain->volume) {
gst_object_unref (chain->volume);
playsink->audiochain->volume = NULL;
}
/* check if the sink, or something within the sink, implements the
* streamvolume interface. If it does we don't need to add a volume element. */
@ -3038,28 +3039,28 @@ setup_audio_chain (GstPlaySink * playsink, gboolean raw)
playsink->mute_changed = FALSE;
g_object_set (chain->conv, "use-volume", FALSE, NULL);
} else if (conv) {
} else if (chain->conv) {
/* no volume, we need to add a volume element when we can */
g_object_set (chain->conv, "use-volume",
! !(playsink->flags & GST_PLAY_FLAG_SOFT_VOLUME), NULL);
GST_DEBUG_OBJECT (playsink, "the sink has no volume property");
if (conv->volume && (playsink->flags & GST_PLAY_FLAG_SOFT_VOLUME)) {
chain->volume = conv->volume;
if (playsink->flags & GST_PLAY_FLAG_SOFT_VOLUME) {
g_object_get (chain->conv, "volume-element", &chain->volume, NULL);
if (chain->volume) {
chain->notify_volume_id =
g_signal_connect (chain->volume, "notify::volume",
G_CALLBACK (notify_volume_cb), playsink);
chain->notify_volume_id =
g_signal_connect (chain->volume, "notify::volume",
G_CALLBACK (notify_volume_cb), playsink);
chain->notify_mute_id = g_signal_connect (chain->volume, "notify::mute",
G_CALLBACK (notify_mute_cb), playsink);
chain->notify_mute_id = g_signal_connect (chain->volume, "notify::mute",
G_CALLBACK (notify_mute_cb), playsink);
/* configure with the latest volume and mute */
g_object_set (G_OBJECT (chain->volume), "volume", playsink->volume, NULL);
g_object_set (G_OBJECT (chain->volume), "mute", playsink->mute, NULL);
/* configure with the latest volume and mute */
g_object_set (G_OBJECT (chain->volume), "volume", playsink->volume,
NULL);
g_object_set (G_OBJECT (chain->volume), "mute", playsink->mute, NULL);
}
}
GST_DEBUG_OBJECT (playsink, "reusing existing volume element");
}
return TRUE;
}
@ -4989,6 +4990,7 @@ gst_play_sink_change_state (GstElement * element, GstStateChange transition)
GST_PLAY_SINK_UNLOCK (playsink);
/* fall through */
case GST_STATE_CHANGE_READY_TO_NULL:
GST_PLAY_SINK_LOCK (playsink);
if (playsink->audiochain && playsink->audiochain->sink_volume) {
/* remove our links to the volume elements when they were
* provided by a sink */
@ -5007,6 +5009,7 @@ gst_play_sink_change_state (GstElement * element, GstStateChange transition)
gst_object_unref (playsink->videochain->ts_offset);
playsink->videochain->ts_offset = NULL;
}
GST_PLAY_SINK_UNLOCK (playsink);
GST_OBJECT_LOCK (playsink);
if (playsink->overlay_element)

9
subprojects/gst-plugins-base/gst/playback/gstplaysinkaudioconvert.c
View file

@ -39,6 +39,7 @@ enum
PROP_0,
PROP_USE_CONVERTERS,
PROP_USE_VOLUME,
PROP_VOLUME_ELEMENT,
};
static gboolean
@ -153,6 +154,9 @@ gst_play_sink_audio_convert_get_property (GObject * object, guint prop_id,
case PROP_USE_VOLUME:
g_value_set_boolean (value, self->use_volume);
break;
case PROP_VOLUME_ELEMENT:
g_value_set_object (value, self->volume);
break;
default:
break;
}
@ -185,6 +189,11 @@ gst_play_sink_audio_convert_class_init (GstPlaySinkAudioConvertClass * klass)
"Whether to use a volume element", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_VOLUME_ELEMENT,
g_param_spec_object ("volume-element", "Volume element",
"Retrieve the soft-volume element used when use-volume=TRUE",
GST_TYPE_ELEMENT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_static_metadata (gstelement_class,
"Player Sink Audio Converter", "Audio/Bin/Converter",
"Convenience bin for audio conversion",

2
subprojects/gst-plugins-base/gst/playback/gstplaysinkaudioconvert.h
View file

@ -43,7 +43,7 @@ struct _GstPlaySinkAudioConvert
{
GstPlaySinkConvertBin parent;
/* < pseudo public > */
/* < private > */
GstElement *volume;
gboolean use_converters;
gboolean use_volume;