glmemory: add gst_gl_memory_allocator_get_default

Add gst_gl_memory_allocator_get_default to get the default allocator based on
the opengl version. Allows us to stop hardcoding the PBO allocator which isn't
supported on gles2.

Fixes GL upload on iOS9 among other things.

ext/gl/gstgloverlay.c

@@ -698,8 +698,8 @@ gst_gl_overlay_load_jpeg (GstGLOverlay * overlay, FILE * fp)
   gst_video_info_align (&v_info, &v_align);
 
   mem_allocator =
-      GST_GL_BASE_MEMORY_ALLOCATOR (gst_allocator_find
-      (GST_GL_MEMORY_PBO_ALLOCATOR_NAME));
+      GST_GL_BASE_MEMORY_ALLOCATOR (gst_gl_memory_allocator_get_default
+      (GST_GL_BASE_FILTER (overlay)->context));
   params =
       gst_gl_video_allocation_params_new (GST_GL_BASE_FILTER (overlay)->context,
       NULL, &v_info, 0, &v_align, GST_GL_TEXTURE_TARGET_2D);
@@ -813,8 +813,8 @@ gst_gl_overlay_load_png (GstGLOverlay * overlay, FILE * fp)
 
   gst_video_info_set_format (&v_info, GST_VIDEO_FORMAT_RGBA, width, height);
   mem_allocator =
-      GST_GL_BASE_MEMORY_ALLOCATOR (gst_allocator_find
-      (GST_GL_MEMORY_PBO_ALLOCATOR_NAME));
+      GST_GL_BASE_MEMORY_ALLOCATOR (gst_gl_memory_allocator_get_default
+      (GST_GL_BASE_FILTER (overlay)->context));
   params =
       gst_gl_video_allocation_params_new (GST_GL_BASE_FILTER (overlay)->context,
       NULL, &v_info, 0, NULL, GST_GL_TEXTURE_TARGET_2D);

gst-libs/gst/gl/gstglbufferpool.c

@@ -122,7 +122,8 @@ gst_gl_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)
   if (allocator /* && GST_IS_GL_MEMORY_ALLOCATOR (allocator) FIXME EGLImage */ ) {
     priv->allocator = gst_object_ref (allocator);
   } else {
-    priv->allocator = gst_allocator_find (GST_GL_MEMORY_PBO_ALLOCATOR_NAME);
+    priv->allocator =
+        GST_ALLOCATOR (gst_gl_memory_allocator_get_default (glpool->context));
     g_assert (priv->allocator);
   }
 

gst-libs/gst/gl/gstglmemory.c

@@ -1173,3 +1173,22 @@ gst_gl_memory_setup_buffer (GstGLMemoryAllocator * allocator,
 
   return TRUE;
 }
+
+GstGLMemoryAllocator *
+gst_gl_memory_allocator_get_default (GstGLContext * context)
+{
+  GstGLMemoryAllocator *allocator = NULL;
+
+  g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);
+
+  if (USING_OPENGL (context) || USING_OPENGL3 (context)
+      || USING_GLES3 (context)) {
+    allocator = (GstGLMemoryAllocator *)
+        gst_allocator_find (GST_GL_MEMORY_PBO_ALLOCATOR_NAME);
+  } else {
+    allocator = (GstGLMemoryAllocator *)
+        gst_allocator_find (GST_GL_MEMORY_ALLOCATOR_NAME);
+  }
+
+  return allocator;
+}

gst-libs/gst/gl/gstglmemory.h

@@ -216,6 +216,9 @@ gboolean                gst_gl_memory_setup_buffer          (GstGLMemoryAllocato
                                                              GstBuffer * buffer,
                                                              GstGLVideoAllocationParams * params);
 
+
+GstGLMemoryAllocator *  gst_gl_memory_allocator_get_default (GstGLContext *context);
+
 G_END_DECLS
 
 #endif /* _GST_GL_MEMORY_H_ */

gst-libs/gst/gl/gstgloverlaycompositor.c

@@ -348,7 +348,8 @@ gst_gl_composition_overlay_upload (GstGLCompositionOverlay * overlay,
     GstGLBaseMemoryAllocator *mem_allocator;
     GstAllocator *allocator;
 
-    allocator = gst_allocator_find (GST_GL_MEMORY_PBO_ALLOCATOR_NAME);
+    allocator =
+        GST_ALLOCATOR (gst_gl_memory_allocator_get_default (overlay->context));
     mem_allocator = GST_GL_BASE_MEMORY_ALLOCATOR (allocator);
 
     gst_gl_composition_overlay_add_transformation (overlay, buf);

gst-libs/gst/gl/gstglupload.c

@@ -223,7 +223,9 @@ _gl_memory_upload_propose_allocation (gpointer impl, GstQuery * decide_query,
     GstAllocationParams params;
     gst_allocation_params_init (&params);
 
-    allocator = gst_allocator_find (GST_GL_MEMORY_PBO_ALLOCATOR_NAME);
+    allocator =
+        GST_ALLOCATOR (gst_gl_memory_allocator_get_default (upload->
+            upload->context));
     gst_query_add_allocation_param (query, allocator, &params);
     gst_object_unref (allocator);
   }
@@ -696,9 +698,7 @@ _upload_meta_upload_perform (gpointer impl, GstBuffer * buffer,
   guint max_planes = GST_VIDEO_INFO_N_PLANES (in_info);
   GstGLMemoryAllocator *allocator;
 
-  allocator =
-      GST_GL_MEMORY_ALLOCATOR (gst_allocator_find
-      (GST_GL_MEMORY_PBO_ALLOCATOR_NAME));
+  allocator = gst_gl_memory_allocator_get_default (upload->upload->context);
 
   /* Support stereo views for separated multiview mode */
   if (GST_VIDEO_INFO_MULTIVIEW_MODE (in_info) ==
@@ -916,8 +916,8 @@ _raw_data_upload_perform (gpointer impl, GstBuffer * buffer,
   guint n_mem = GST_VIDEO_INFO_N_PLANES (in_info);
 
   allocator =
-      GST_GL_BASE_MEMORY_ALLOCATOR (gst_allocator_find
-      (GST_GL_MEMORY_PBO_ALLOCATOR_NAME));
+      GST_GL_BASE_MEMORY_ALLOCATOR (gst_gl_memory_allocator_get_default
+      (raw->upload->context));
 
   /* FIXME Use a buffer pool to cache the generated textures */
   /* FIXME: multiview support with separated left/right frames? */

gst-libs/gst/gl/gstglviewconvert.c

@@ -1897,7 +1897,9 @@ _gen_buffer (GstGLViewConvert * viewconvert, GstBuffer ** target)
 
   *target = gst_buffer_new ();
 
-  allocator = gst_allocator_find (GST_GL_MEMORY_PBO_ALLOCATOR_NAME);
+  allocator =
+      GST_ALLOCATOR (gst_gl_memory_allocator_get_default
+      (viewconvert->context));
   mem_allocator = GST_GL_MEMORY_ALLOCATOR (allocator);
   params = gst_gl_video_allocation_params_new (viewconvert->context, NULL,
       &viewconvert->out_info, 0, NULL, viewconvert->to_texture_target);
@@ -2037,7 +2039,8 @@ _do_view_convert (GstGLContext * context, GstGLViewConvert * viewconvert)
         gst_video_info_set_format (&temp_info, GST_VIDEO_FORMAT_RGBA, out_width,
             out_height);
 
-        allocator = gst_allocator_find (GST_GL_MEMORY_PBO_ALLOCATOR_NAME);
+        allocator =
+            GST_ALLOCATOR (gst_gl_memory_allocator_get_default (context));
         base_mem_allocator = GST_GL_BASE_MEMORY_ALLOCATOR (allocator);
         params = gst_gl_video_allocation_params_new (context, NULL, &temp_info,
             0, NULL, viewconvert->to_texture_target);