Changeset 207886 in webkit

Timestamp:

Oct 26, 2016 1:45:15 AM (7 years ago)

Author:

eocanha@igalia.com

Message:

[GStreamer][EME] Utility function to create decryptor
​https://bugs.webkit.org/show_bug.cgi?id=162914

Reviewed by Xabier Rodriguez-Calvar.

Add a utility function to find a suitable GStreamer decryptor element.

This patch is authored by Philippe Normand <​philn@igalia.com>.

• platform/graphics/gstreamer/GStreamerUtilities.cpp:

(WebCore::createGstDecryptor):
(WebCore::gstRegistryHasElementForMediaType): Deleted.

• platform/graphics/gstreamer/GStreamerUtilities.h:

Location:

trunk/Source/WebCore

Files:

• ChangeLog (modified) (1 diff)
• platform/graphics/gstreamer/GStreamerUtilities.cpp (modified) (2 diffs)
• platform/graphics/gstreamer/GStreamerUtilities.h (modified) (3 diffs)

trunk/Source/WebCore/ChangeLog

@@ +1 @@
+2016-10-26  Enrique Ocaña González  <eocanha@igalia.com>
+
+        [GStreamer][EME] Utility function to create decryptor
+        https://bugs.webkit.org/show_bug.cgi?id=162914
+
+        Reviewed by Xabier Rodriguez-Calvar.
+
+        Add a utility function to find a suitable GStreamer decryptor element.
+
+        This patch is authored by Philippe Normand <philn@igalia.com>.
+
+        * platform/graphics/gstreamer/GStreamerUtilities.cpp:
+        (WebCore::createGstDecryptor):
+        (WebCore::gstRegistryHasElementForMediaType): Deleted.
+        * platform/graphics/gstreamer/GStreamerUtilities.h:
+
 2016-10-26  Enrique Ocaña González  <eocanha@igalia.com>
 

trunk/Source/WebCore/platform/graphics/gstreamer/GStreamerUtilities.cpp

@@ -1 +1 @@
 /*
- *  Copyright (C) 2012 Igalia S.L
+ *  Copyright (C) 2012, 2015, 2016 Igalia S.L
+ *  Copyright (C) 2015, 2016 Metrological Group B.V.
  *
  *  This library is free software; you can redistribute it and/or
@@ -197 +198 @@
 }
 
+#if GST_CHECK_VERSION(1, 5, 3) && ENABLE(LEGACY_ENCRYPTED_MEDIA)
+GstElement* createGstDecryptor(const gchar* protectionSystem)
+{
+    GstElement* decryptor = nullptr;
+    GList* decryptors = gst_element_factory_list_get_elements(GST_ELEMENT_FACTORY_TYPE_DECRYPTOR, GST_RANK_MARGINAL);
+
+    GST_TRACE("looking for decryptor for %s", protectionSystem);
+
+    for (GList* walk = decryptors; !decryptor && walk; walk = g_list_next(walk)) {
+        GstElementFactory* factory = reinterpret_cast<GstElementFactory*>(walk->data);
+
+        GST_TRACE("checking factory %s", GST_OBJECT_NAME(factory));
+
+        for (const GList* current = gst_element_factory_get_static_pad_templates(factory); current && !decryptor; current = g_list_next(current)) {
+            GstStaticPadTemplate* staticPadTemplate = static_cast<GstStaticPadTemplate*>(current->data);
+            GRefPtr<GstCaps> caps = adoptGRef(gst_static_pad_template_get_caps(staticPadTemplate));
+            unsigned length = gst_caps_get_size(caps.get());
+
+            GST_TRACE("factory %s caps has size %u", GST_OBJECT_NAME(factory), length);
+            for (unsigned i = 0; !decryptor && i < length; ++i) {
+                GstStructure* structure = gst_caps_get_structure(caps.get(), i);
+                GST_TRACE("checking structure %s", gst_structure_get_name(structure));
+                if (gst_structure_has_field_typed(structure, GST_PROTECTION_SYSTEM_ID_CAPS_FIELD, G_TYPE_STRING)) {
+                    const gchar* sysId = gst_structure_get_string(structure, GST_PROTECTION_SYSTEM_ID_CAPS_FIELD);
+                    GST_TRACE("structure %s has protection system %s", gst_structure_get_name(structure), sysId);
+                    if (!g_ascii_strcasecmp(protectionSystem, sysId)) {
+                        GST_DEBUG("found decryptor %s for %s", GST_OBJECT_NAME(factory), protectionSystem);
+                        decryptor = gst_element_factory_create(factory, nullptr);
+                        break;
+                    }
+                }
+            }
+        }
+    }
+    gst_plugin_feature_list_free(decryptors);
+    GST_TRACE("returning decryptor %p", decryptor);
+    return decryptor;
+}
+#endif
+
 }
 

trunk/Source/WebCore/platform/graphics/gstreamer/GStreamerUtilities.h

@@ -1 +1 @@
 /*
- *  Copyright (C) 2012 Igalia S.L
+ *  Copyright (C) 2012, 2015, 2016 Igalia S.L
+ *  Copyright (C) 2015, 2016 Metrological Group B.V.
  *
  *  This library is free software; you can redistribute it and/or
@@ -16 +17 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
+
+#pragma once
 
 #include "Logging.h"
@@ -62 +65 @@
 GstClockTime toGstClockTime(float time);
 bool gstRegistryHasElementForMediaType(GList* elementFactories, const char* capsString);
+
+#if GST_CHECK_VERSION(1, 5, 3) && ENABLE(LEGACY_ENCRYPTED_MEDIA)
+GstElement* createGstDecryptor(const gchar* protectionSystem);
+#endif
 }