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GstEnginePipeline: Add back volume sync for auto

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We need to remove the volume sync when the element is deleted on "deep-element-removed", then re-add it on the next "deep-element-added" that isn't a fakesink.

Fixes #1123
This commit is contained in:
Jonas Kvinge 2024-03-24 19:36:32 +01:00
parent b95be526d3
commit 9bbffe150f
2 changed files with 64 additions and 9 deletions
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71
src/engine/gstenginepipeline.cpp
View File

@ -131,6 +131,7 @@ GstEnginePipeline::GstEnginePipeline(QObject *parent)
buffer_probe_cb_id_(0),
playbin_probe_cb_id_(0),
element_added_cb_id_(-1),
element_removed_cb_id_(-1),
pad_added_cb_id_(-1),
notify_source_cb_id_(-1),
about_to_finish_cb_id_(-1),
@ -158,6 +159,10 @@ GstEnginePipeline::~GstEnginePipeline() {
g_signal_handler_disconnect(G_OBJECT(audiobin_), element_added_cb_id_);
}
if (element_removed_cb_id_ != -1) {
g_signal_handler_disconnect(G_OBJECT(audiobin_), element_removed_cb_id_);
}
if (pad_added_cb_id_ != -1) {
g_signal_handler_disconnect(G_OBJECT(pipeline_), pad_added_cb_id_);
}
@ -355,6 +360,23 @@ bool GstEnginePipeline::InitFromUrl(const QUrl &media_url, const QUrl &stream_ur
if (!InitAudioBin(error)) return false;
#ifdef Q_OS_WIN32
if (volume_enabled_ && !volume_ && volume_sw_) {
SetupVolume(volume_sw_);
}
#else
if (volume_enabled_ && !volume_) {
if (output_ == GstEngine::kAutoSink) {
element_added_cb_id_ = CHECKED_GCONNECT(G_OBJECT(audiobin_), "deep-element-added", &ElementAddedCallback, this);
element_removed_cb_id_ = CHECKED_GCONNECT(G_OBJECT(audiobin_), "deep-element-removed", &ElementRemovedCallback, this);
}
else if (volume_sw_) {
qLog(Debug) << output_ << "does not have volume, using own volume.";
SetupVolume(volume_sw_);
}
}
#endif
// Set playbin's sink to be our custom audio-sink.
g_object_set(GST_OBJECT(pipeline_), "audio-sink", audiobin_, nullptr);
@ -565,8 +587,6 @@ bool GstEnginePipeline::InitAudioBin(QString &error) {
if (!volume_sw_) {
return false;
}
qLog(Debug) << output_ << "does not have volume, using own volume.";
SetupVolume(volume_sw_);
}
if (fading_enabled_) {
@ -845,10 +865,27 @@ bool GstEnginePipeline::InitAudioBin(QString &error) {
void GstEnginePipeline::SetupVolume(GstElement *element) {
if (volume_) return;
if (volume_) {
qLog(Debug) << "Disonnecting volume notify on" << volume_;
g_signal_handler_disconnect(G_OBJECT(volume_), notify_volume_cb_id_);
notify_volume_cb_id_ = -1;
volume_ = nullptr;
}
volume_ = element;
qLog(Debug) << "Connecting volume notify on" << element;
notify_volume_cb_id_ = CHECKED_GCONNECT(G_OBJECT(element), "notify::volume", &NotifyVolumeCallback, this);
volume_ = element;
volume_set_ = false;
// Make sure the unused volume element is set to 1.0.
if (volume_sw_ && volume_sw_ != volume_) {
double volume_internal = 1.0;
g_object_get(G_OBJECT(volume_sw_), "volume", &volume_internal, nullptr);
if (volume_internal != 1.0) {
volume_internal = 1.0;
g_object_set(G_OBJECT(volume_sw_), "volume", volume_internal, nullptr);
}
}
}
@ -885,18 +922,19 @@ void GstEnginePipeline::ElementAddedCallback(GstBin *bin, GstBin*, GstElement *e
GstEnginePipeline *instance = reinterpret_cast<GstEnginePipeline*>(self);
if (bin != GST_BIN(instance->audiobin_) || GST_ELEMENT(gst_element_get_parent(element)) != instance->audiosink_ || instance->volume_) return;
gchar *element_name_char = gst_element_get_name(element);
const QString element_name(element_name_char);
g_free(element_name_char);
g_signal_handler_disconnect(G_OBJECT(instance->audiobin_), instance->element_added_cb_id_);
instance->element_added_cb_id_ = -1;
if (bin != GST_BIN(instance->audiobin_) || element_name == QStringLiteral("fake-audio-sink") || GST_ELEMENT(gst_element_get_parent(element)) != instance->audiosink_) return;
GstElement *volume = nullptr;
if (GST_IS_STREAM_VOLUME(element)) {
qLog(Debug) << instance->output_ << "has volume, enabling volume synchronization.";
qLog(Debug) << element_name << "has volume, enabling volume synchronization.";
volume = element;
}
else {
qLog(Debug) << instance->output_ << "does not have volume, using own volume.";
qLog(Debug) << element_name << "does not have volume, using own volume.";
volume = instance->volume_sw_;
}
@ -905,6 +943,21 @@ void GstEnginePipeline::ElementAddedCallback(GstBin *bin, GstBin*, GstElement *e
}
void GstEnginePipeline::ElementRemovedCallback(GstBin *bin, GstBin*, GstElement *element, gpointer self) {
GstEnginePipeline *instance = reinterpret_cast<GstEnginePipeline*>(self);
if (bin != GST_BIN(instance->audiobin_)) return;
if (instance->notify_volume_cb_id_ != -1 && element == instance->volume_) {
qLog(Debug) << "Disconnecting volume notify on" << instance->volume_;
g_signal_handler_disconnect(G_OBJECT(instance->volume_), instance->notify_volume_cb_id_);
instance->notify_volume_cb_id_ = -1;
instance->volume_ = nullptr;
}
}
void GstEnginePipeline::SourceSetupCallback(GstElement *playbin, GstElement *source, gpointer self) {
Q_UNUSED(playbin)

2
src/engine/gstenginepipeline.h
View File

@ -162,6 +162,7 @@ class GstEnginePipeline : public QObject {
static GstPadProbeReturn BufferProbeCallback(GstPad *pad, GstPadProbeInfo *info, gpointer self);
static GstPadProbeReturn PlaybinProbeCallback(GstPad *pad, GstPadProbeInfo *info, gpointer self);
static void ElementAddedCallback(GstBin *bin, GstBin*, GstElement *element, gpointer self);
static void ElementRemovedCallback(GstBin *bin, GstBin*, GstElement *element, gpointer self);
static void PadAddedCallback(GstElement *element, GstPad *pad, gpointer self);
static void SourceSetupCallback(GstElement *playbin, GstElement *source, gpointer self);
static void NotifyVolumeCallback(GstElement *element, GParamSpec *param_spec, gpointer self);
@ -323,6 +324,7 @@ class GstEnginePipeline : public QObject {
gulong buffer_probe_cb_id_;
gulong playbin_probe_cb_id_;
glong element_added_cb_id_;
glong element_removed_cb_id_;
glong pad_added_cb_id_;
glong notify_source_cb_id_;
glong about_to_finish_cb_id_;