Attachment 340182 Details for Bug 185535 – Patch

[patch] Patch

bug-185535-20180511113950.patch (text/plain), 6.14 KB, created by Yacine Bandou on 2018-05-11 02:39:46 PDT

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Creator: Yacine Bandou

Created: 2018-05-11 02:39:46 PDT

Size: 6.14 KB

patch

obsolete

>Subversion Revision: 231637
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index cd794e4d4c9ea2e6629d5edc6029c53dfbdcb726..dace17655422d4f1c4c243e87e4d721ddbcc05df 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,21 @@
>+2018-05-10  Yacine Bandou  <yacine.bandou_ext@softathome.com>
>+
>+        [EME][GStreamer] Handle the protection event in MediaPlayerPrivate
>+        https://bugs.webkit.org/show_bug.cgi?id=185535
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        This patch is based on this calvaris's commit
>+        https://github.com/WebPlatformForEmbedded/WPEWebKit/commit/d966168b0d2b65f9ca9415426e26d3752c78b03e
>+
>+        It adds a handler for the protection event in MediaPalyerPrivate, it extracts the InitData from the event
>+        and sends the encrypted event to JS via HTMLMediaElement.
>+        * platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp:
>+        (WebCore::MediaPlayerPrivateGStreamerBase::initializationDataEncountered):
>+        (WebCore::MediaPlayerPrivateGStreamerBase::handleProtectionEvent):
>+        * platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.h:
>+        * platform/graphics/gstreamer/eme/GStreamerEMEUtilities.h: Add a new type InitData.
>+
> 2018-05-10  Yacine Bandou  <yacine.bandou_ext@softathome.com>
> 
>         [EME][GStreamer] Add a handler for GStreamer protection event
>diff --git a/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp b/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp
>index 274f070b6412343044ee125a412b51742bac8243..1d233e27f4788d5380448795abace26101c11418 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp
>+++ b/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.cpp
>@@ -1204,6 +1204,43 @@ unsigned MediaPlayerPrivateGStreamerBase::videoDecodedByteCount() const
> }
> 
> #if ENABLE(ENCRYPTED_MEDIA)
>+void MediaPlayerPrivateGStreamerBase::initializationDataEncountered(GstEvent* event)
>+{
>+    // FIXME: Inform that we are waiting for a key.
>+    const char* eventKeySystemUUID = nullptr;
>+    GstBuffer* data = nullptr;
>+    gst_event_parse_protection(event, &eventKeySystemUUID, &data, nullptr);
>+
>+    // Check if the system key of the protection event is the same of the CDM instance.
>+    // For example: we can receive a new a Widevine protection event but the CDM instance initialized with
>+    // Palyread, so we ignore this event.
>+    if (m_cdmInstance && g_strcmp0(GStreamerEMEUtilities::keySystemToUuid(m_cdmInstance->keySystem()), eventKeySystemUUID)) {
>+        GST_DEBUG("The protection event with UUID %s is ignored because it isn't supported by the CDM %s", eventKeySystemUUID, m_cdmInstance->keySystem().utf8().data());
>+        return;
>+    }
>+
>+    GstMapInfo mapInfo;
>+    if (!gst_buffer_map(data, &mapInfo, GST_MAP_READ)) {
>+        GST_WARNING("cannot map %s protection data", eventKeySystemUUID);
>+        return;
>+    }
>+
>+    GST_TRACE("init data encountered for %s of size %" G_GSIZE_FORMAT, eventKeySystemUUID, mapInfo.size);
>+    GST_MEMDUMP("init data", reinterpret_cast<const uint8_t*>(mapInfo.data), mapInfo.size);
>+    InitData initData(reinterpret_cast<const uint8_t*>(mapInfo.data), mapInfo.size);
>+    gst_buffer_unmap(data, &mapInfo);
>+
>+    String eventKeySystemUUIDString = eventKeySystemUUID;
>+    RunLoop::main().dispatch([weakThis = m_weakPtrFactory.createWeakPtr(*this), eventKeySystemUUID = eventKeySystemUUIDString, initData] {
>+        if (!weakThis)
>+            return;
>+
>+        GST_DEBUG("scheduling initializationDataEncountered event for %s with init data size of %" G_GSIZE_FORMAT, eventKeySystemUUID.utf8().data(), initData.sizeInBytes());
>+        GST_MEMDUMP("init datas", reinterpret_cast<const uint8_t*>(initData.characters8()), initData.sizeInBytes());
>+        weakThis->m_player->initializationDataEncountered(ASCIILiteral("cenc"), ArrayBuffer::create(reinterpret_cast<const uint8_t*>(initData.characters8()), initData.sizeInBytes()));
>+    });
>+}
>+
> void MediaPlayerPrivateGStreamerBase::cdmInstanceAttached(CDMInstance& instance)
> {
>     if (m_cdmInstance != &instance) {
>@@ -1256,18 +1293,9 @@ void MediaPlayerPrivateGStreamerBase::handleProtectionEvent(GstEvent* event)
> {
>     if (m_handledProtectionEvents.contains(GST_EVENT_SEQNUM(event))) {
>         GST_DEBUG_OBJECT(pipeline(), "event %u already handled", GST_EVENT_SEQNUM(event));
>-        m_handledProtectionEvents.remove(GST_EVENT_SEQNUM(event));
>-        if (m_needToResendCredentials) {
>-            GST_DEBUG_OBJECT(pipeline(), "resending credentials");
>-            attemptToDecryptWithLocalInstance();
>-        }
>         return;
>     }
>-
>-    const gchar* eventKeySystemId = nullptr;
>-    gst_event_parse_protection(event, &eventKeySystemId, nullptr, nullptr);
>-    GST_WARNING("FIXME: unhandled protection event for %s", eventKeySystemId);
>-    ASSERT_NOT_REACHED();
>+    initializationDataEncountered(event);
> }
> #endif
> 
>diff --git a/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.h b/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.h
>index 64ffb8def3de5a1ffd1df510c33bd758f0916eaa..342e7959b7c8d58f46cf0d7edd3f221b95d423c4 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamerBase.h
>@@ -144,6 +144,7 @@ public:
>     void attemptToDecryptWithLocalInstance();
>     void attemptToDecryptWithInstance(CDMInstance&) override;
>     void dispatchCDMInstance();
>+    void initializationDataEncountered(GstEvent*);
> #endif
> 
>     static bool supportsKeySystem(const String& keySystem, const String& mimeType);
>diff --git a/Source/WebCore/platform/graphics/gstreamer/eme/GStreamerEMEUtilities.h b/Source/WebCore/platform/graphics/gstreamer/eme/GStreamerEMEUtilities.h
>index 5410cb2296a3225d2c15a831505c1f7f448a2029..0cff539b20e9653ff9237d0715facd0c439ebf69 100644
>--- a/Source/WebCore/platform/graphics/gstreamer/eme/GStreamerEMEUtilities.h
>+++ b/Source/WebCore/platform/graphics/gstreamer/eme/GStreamerEMEUtilities.h
>@@ -31,6 +31,8 @@
> 
> namespace WebCore {
> 
>+using InitData = String;
>+
> class GStreamerEMEUtilities {
> 
> public:

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