python: Add a Gst.init_python function to be called from plugins

Plugins know that they will be initialized after Gst was initialized
so they can call the initialization function dedicated for the python
bindings

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2675>

diff --git a/subprojects/gst-python/examples/plugins/python/audioplot.py b/subprojects/gst-python/examples/plugins/python/audioplot.py
index cf1032f..8747fee 100644 (file)
--- a/subprojects/gst-python/examples/plugins/python/audioplot.py
+++ b/subprojects/gst-python/examples/plugins/python/audioplot.py
@@ -29,7 +29,7 @@ except ImportError:
     raise
 
 
-Gst.init(None)
+Gst.init_python()
 
 AUDIO_FORMATS = [f.strip() for f in
                  GstAudio.AUDIO_FORMATS_ALL.strip('{ }').split(',')]

diff --git a/subprojects/gst-python/examples/plugins/python/exampleTransform.py b/subprojects/gst-python/examples/plugins/python/exampleTransform.py
index ed73904..d244acb 100755 (executable)
--- a/subprojects/gst-python/examples/plugins/python/exampleTransform.py
+++ b/subprojects/gst-python/examples/plugins/python/exampleTransform.py
@@ -15,7 +15,7 @@ from gi.repository import Gst, GObject, GstBase, GstVideo
 
 import numpy as np
 
-Gst.init(None)
+Gst.init_python()
 FIXED_CAPS = Gst.Caps.from_string('video/x-raw,format=GRAY8,width=[1,2147483647],height=[1,2147483647]')
 
 class ExampleTransform(GstBase.BaseTransform):

diff --git a/subprojects/gst-python/examples/plugins/python/identity.py b/subprojects/gst-python/examples/plugins/python/identity.py
index 0f42efc..23baf21 100644 (file)
--- a/subprojects/gst-python/examples/plugins/python/identity.py
+++ b/subprojects/gst-python/examples/plugins/python/identity.py
@@ -16,7 +16,7 @@ import gi
 gi.require_version('GstBase', '1.0')
 
 from gi.repository import Gst, GObject, GstBase
-Gst.init(None)
+Gst.init_python()
 
 #
 # Simple Identity element created entirely in python

diff --git a/subprojects/gst-python/examples/plugins/python/mixer.py b/subprojects/gst-python/examples/plugins/python/mixer.py
index 5d9aafe..846508a 100644 (file)
--- a/subprojects/gst-python/examples/plugins/python/mixer.py
+++ b/subprojects/gst-python/examples/plugins/python/mixer.py
@@ -20,7 +20,7 @@ gi.require_version('GObject', '2.0')
 
 from gi.repository import Gst, GObject, GstBase
 
-Gst.init(None)
+Gst.init_python()
 
 try:
     from PIL import Image

diff --git a/subprojects/gst-python/examples/plugins/python/py_audiotestsrc.py b/subprojects/gst-python/examples/plugins/python/py_audiotestsrc.py
index 5e5ef3b..3684d67 100644 (file)
--- a/subprojects/gst-python/examples/plugins/python/py_audiotestsrc.py
+++ b/subprojects/gst-python/examples/plugins/python/py_audiotestsrc.py
@@ -22,6 +22,8 @@ except ImportError:
     Gst.error('py_audiotestsrc requires numpy')
     raise
 
+Gst.init_python()
+
 OCAPS = Gst.Caps.from_string (
         'audio/x-raw, format=F32LE, layout=interleaved, rate=44100, channels=2')
 

diff --git a/subprojects/gst-python/examples/plugins/python/sinkelement.py b/subprojects/gst-python/examples/plugins/python/sinkelement.py
index 94281e4..249e9c0 100644 (file)
--- a/subprojects/gst-python/examples/plugins/python/sinkelement.py
+++ b/subprojects/gst-python/examples/plugins/python/sinkelement.py
@@ -21,7 +21,7 @@
 #  $ gst-launch-1.0 videotestsrc ! pymysink://
 
 from gi.repository import Gst, GObject, GstBase
-Gst.init(None)
+Gst.init_python()
 
 #
 # Simple Sink element created entirely in python

diff --git a/subprojects/gst-python/gi/overrides/Gst.py b/subprojects/gst-python/gi/overrides/Gst.py
index cef36d6..902f531 100644 (file)
--- a/subprojects/gst-python/gi/overrides/Gst.py
+++ b/subprojects/gst-python/gi/overrides/Gst.py
@@ -755,7 +755,14 @@ def deinit():
     deinit_pygst()
     return real_deinit()
 
+def init_python():
+    if not Gst.is_initialized():
+        raise NotInitialized("Gst.init_python should never be called before GStreamer itself is initialized")
+
+    init_pygst()
+
 Gst.deinit = deinit
+Gst.init_python = init_python
 
 if not Gst.is_initialized():
     deinit_pygst()