GStreamer: fix memory leaks.

Many GStreamer objects were not properly managed or never released.

Change-Id: I38b3854e8b9e2264b5b647f331d3bb16b886e2d6
Reviewed-by: Andrew den Exter <andrew.den.exter@qinetic.com.au>

src/plugins/gstreamer/camerabin/camerabinaudioencoder.cpp

@@ -114,11 +114,15 @@ GstEncodingProfile *CameraBinAudioEncoder::createProfile()
     else
         caps = gst_caps_from_string(codec.toLatin1());
 
-    return (GstEncodingProfile *)gst_encoding_audio_profile_new(
-                                        caps,
-                                        !preset.isEmpty() ? preset.toLatin1().constData() : NULL, //preset
-                                        NULL,   //restriction
-                                        0);     //presence
+    GstEncodingProfile *profile = (GstEncodingProfile *)gst_encoding_audio_profile_new(
+                caps,
+                !preset.isEmpty() ? preset.toLatin1().constData() : NULL, //preset
+                NULL,   //restriction
+                0);     //presence
+
+    gst_caps_unref(caps);
+
+    return profile;
 }
 
 QT_END_NAMESPACE

src/plugins/gstreamer/camerabin/camerabincontainer.cpp

@@ -124,11 +124,15 @@ GstEncodingContainerProfile *CameraBinContainer::createProfile()
         caps = gst_caps_from_string(format.toLatin1());
     }
 
-    return (GstEncodingContainerProfile *)gst_encoding_container_profile_new(
-                                        "camerabin2_profile",
-                                        (gchar *)"custom camera profile",
-                                        caps,
-                                        NULL); //preset
+    GstEncodingContainerProfile *profile = (GstEncodingContainerProfile *)gst_encoding_container_profile_new(
+                "camerabin2_profile",
+                (gchar *)"custom camera profile",
+                caps,
+                NULL); //preset
+
+    gst_caps_unref(caps);
+
+    return profile;
 }
 
 /*!

src/plugins/gstreamer/camerabin/camerabinrecorder.cpp

@@ -191,10 +191,14 @@ GstEncodingContainerProfile *CameraBinRecorder::videoProfile()
         GstEncodingProfile *audioProfile = m_session->audioEncodeControl()->createProfile();
         GstEncodingProfile *videoProfile = m_session->videoEncodeControl()->createProfile();
 
-        if (audioProfile)
-            gst_encoding_container_profile_add_profile(containerProfile, audioProfile);
-        if (videoProfile)
-            gst_encoding_container_profile_add_profile(containerProfile, videoProfile);
+        if (audioProfile) {
+            if (!gst_encoding_container_profile_add_profile(containerProfile, audioProfile))
+                gst_encoding_profile_unref(audioProfile);
+        }
+        if (videoProfile) {
+            if (!gst_encoding_container_profile_add_profile(containerProfile, videoProfile))
+                gst_encoding_profile_unref(videoProfile);
+        }
     }
 
     return containerProfile;

src/plugins/gstreamer/camerabin/camerabinsession.cpp

@@ -61,6 +61,7 @@
 #include "camerabincapturebufferformat.h"
 #include <private/qgstreamerbushelper_p.h>
 #include <private/qgstreamervideorendererinterface_p.h>
+#include <private/qgstutils_p.h>
 #include <qmediarecorder.h>
 
 #ifdef HAVE_GST_PHOTOGRAPHY
@@ -108,9 +109,6 @@
 #define CAMERABIN_IMAGE_MODE 1
 #define CAMERABIN_VIDEO_MODE 2
 
-#define gstRef(element) { gst_object_ref(GST_OBJECT(element)); gst_object_sink(GST_OBJECT(element)); }
-#define gstUnref(element) { if (element) { gst_object_unref(GST_OBJECT(element)); element = 0; } }
-
 #define PREVIEW_CAPS_4_3 \
     "video/x-raw-rgb, width = (int) 640, height = (int) 480"
 
@@ -146,7 +144,7 @@ CameraBinSession::CameraBinSession(QObject *parent)
 {
     m_camerabin = gst_element_factory_make("camerabin2", "camerabin2");
     g_signal_connect(G_OBJECT(m_camerabin), "notify::idle", G_CALLBACK(updateBusyStatus), this);
-    gstRef(m_camerabin);
+    qt_gst_object_ref_sink(m_camerabin);
 
     m_bus = gst_element_get_bus(m_camerabin);
 
@@ -192,9 +190,11 @@ CameraBinSession::~CameraBinSession()
 
         gst_element_set_state(m_camerabin, GST_STATE_NULL);
         gst_element_get_state(m_camerabin, NULL, NULL, GST_CLOCK_TIME_NONE);
-        gstUnref(m_camerabin);
-        gstUnref(m_viewfinderElement);
+        gst_object_unref(GST_OBJECT(m_bus));
+        gst_object_unref(GST_OBJECT(m_camerabin));
     }
+    if (m_viewfinderElement)
+        gst_object_unref(GST_OBJECT(m_viewfinderElement));
 }
 
 #ifdef HAVE_GST_PHOTOGRAPHY
@@ -239,7 +239,7 @@ bool CameraBinSession::setupCameraBin()
             qWarning() << "Staring camera without viewfinder available";
             m_viewfinderElement = gst_element_factory_make("fakesink", NULL);
         }
-        gst_object_ref(GST_OBJECT(m_viewfinderElement));
+        qt_gst_object_ref_sink(GST_OBJECT(m_viewfinderElement));
         gst_element_set_state(m_camerabin, GST_STATE_NULL);
         g_object_set(G_OBJECT(m_camerabin), VIEWFINDER_SINK_PROPERTY, m_viewfinderElement, NULL);
     }
@@ -438,6 +438,9 @@ GstElement *CameraBinSession::buildCameraSource()
     if (m_videoSrc != videoSrc)
         g_object_set(G_OBJECT(m_camerabin), CAMERA_SOURCE_PROPERTY, m_videoSrc, NULL);
 
+    if (videoSrc)
+        gst_object_unref(GST_OBJECT(videoSrc));
+
     return m_videoSrc;
 }
 
@@ -680,10 +683,12 @@ void CameraBinSession::setState(QCamera::State newState)
 
             m_recorderControl->applySettings();
 
+            GstEncodingContainerProfile *profile = m_recorderControl->videoProfile();
             g_object_set (G_OBJECT(m_camerabin),
                           "video-profile",
-                          m_recorderControl->videoProfile(),
+                          profile,
                           NULL);
+            gst_encoding_profile_unref(profile);
 
             setAudioCaptureCaps();
 
@@ -803,6 +808,7 @@ void CameraBinSession::setMetaData(const QMap<QByteArray, QVariant> &data)
                 }
             }
         }
+        gst_iterator_free(elements);
     }
 }
 

src/plugins/gstreamer/camerabin/camerabinvideoencoder.cpp

@@ -175,6 +175,8 @@ GstEncodingProfile *CameraBinVideoEncoder::createProfile()
                 NULL, //restriction
                 1); //presence
 
+    gst_caps_unref(caps);
+
     gst_encoding_video_profile_set_pass(profile, 0);
     gst_encoding_video_profile_set_variableframerate(profile, TRUE);