diff -r 000000000000 -r 6474c204b198 content/media/plugins/MediaPluginHost.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/plugins/MediaPluginHost.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,330 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "mozilla/Preferences.h"
+#include "mozilla/dom/TimeRanges.h"
+#include "MediaResource.h"
+#include "mozilla/dom/HTMLMediaElement.h"
+#include "MediaPluginHost.h"
+#include "nsXPCOMStrings.h"
+#include "nsISeekableStream.h"
+#include "MediaPluginReader.h"
+#include "nsIGfxInfo.h"
+#include "gfxCrashReporterUtils.h"
+#include "prmem.h"
+#include "prlink.h"
+#include "MediaResourceServer.h"
+#include "nsServiceManagerUtils.h"
+
+#include "MPAPI.h"
+
+#include "nsIPropertyBag2.h"
+
+#if defined(ANDROID) || defined(MOZ_WIDGET_GONK)
+#include "android/log.h"
+#define ALOG(args...)  __android_log_print(ANDROID_LOG_INFO, "MediaPluginHost" , ## args)
+#else
+#define ALOG(args...) /* do nothing */
+#endif
+
+using namespace MPAPI;
+
+Decoder::Decoder() :
+  mResource(nullptr), mPrivate(nullptr)
+{
+}
+
+namespace mozilla {
+
+static char* GetResource(Decoder *aDecoder)
+{
+  return static_cast<char*>(aDecoder->mResource);
+}
+
+class GetIntPrefEvent : public nsRunnable {
+public:
+  GetIntPrefEvent(const char* aPref, int32_t* aResult)
+    : mPref(aPref), mResult(aResult) {}
+  NS_IMETHOD Run() {
+    return Preferences::GetInt(mPref, mResult);
+  }
+private:
+  const char* mPref;
+  int32_t*    mResult;
+};
+
+static bool GetIntPref(const char* aPref, int32_t* aResult)
+{
+  // GetIntPref() is called on the decoder thread, but the Preferences API
+  // can only be called on the main thread. Post a runnable and wait.
+  NS_ENSURE_TRUE(aPref, false);
+  NS_ENSURE_TRUE(aResult, false);
+  nsCOMPtr<nsIRunnable> event = new GetIntPrefEvent(aPref, aResult);
+  return NS_SUCCEEDED(NS_DispatchToMainThread(event, NS_DISPATCH_SYNC));
+}
+
+static bool
+GetSystemInfoString(const char *aKey, char *aResult, size_t aResultLength)
+{
+  NS_ENSURE_TRUE(aKey, false);
+  NS_ENSURE_TRUE(aResult, false);
+
+  nsCOMPtr<nsIPropertyBag2> infoService = do_GetService("@mozilla.org/system-info;1");
+  NS_ASSERTION(infoService, "Could not find a system info service");
+
+  nsAutoCString key(aKey);
+  nsAutoCString info;
+  nsresult rv = infoService->GetPropertyAsACString(NS_ConvertUTF8toUTF16(key),
+                                                  info);
+
+  NS_ENSURE_SUCCESS(rv, false);
+
+  strncpy(aResult, info.get(), aResultLength);
+
+  return true;
+}
+
+static PluginHost sPluginHost = {
+  nullptr,
+  nullptr,
+  nullptr,
+  nullptr,
+  GetIntPref,
+  GetSystemInfoString
+};
+
+// Return true if Omx decoding is supported on the device. This checks the
+// built in whitelist/blacklist and preferences to see if that is overridden.
+static bool IsOmxSupported()
+{
+  bool forceEnabled =
+      Preferences::GetBool("stagefright.force-enabled", false);
+  bool disabled =
+      Preferences::GetBool("stagefright.disabled", false);
+
+  if (disabled) {
+    NS_WARNING("XXX stagefright disabled\n");
+    return false;
+  }
+
+  ScopedGfxFeatureReporter reporter("Stagefright", forceEnabled);
+
+  if (!forceEnabled) {
+    nsCOMPtr<nsIGfxInfo> gfxInfo = do_GetService("@mozilla.org/gfx/info;1");
+    if (gfxInfo) {
+      int32_t status;
+      if (NS_SUCCEEDED(gfxInfo->GetFeatureStatus(nsIGfxInfo::FEATURE_STAGEFRIGHT, &status))) {
+        if (status != nsIGfxInfo::FEATURE_NO_INFO) {
+          NS_WARNING("XXX stagefright blacklisted\n");
+          return false;
+        }
+      }
+    }
+  }
+
+  reporter.SetSuccessful();
+  return true;
+}
+
+// Return the name of the shared library that implements Omx based decoding. This varies
+// depending on libstagefright version installed on the device and whether it is B2G vs Android.
+// nullptr is returned if Omx decoding is not supported on the device,
+static const char* GetOmxLibraryName()
+{
+#if defined(ANDROID) && !defined(MOZ_WIDGET_GONK)
+  nsCOMPtr<nsIPropertyBag2> infoService = do_GetService("@mozilla.org/system-info;1");
+  NS_ASSERTION(infoService, "Could not find a system info service");
+
+  int32_t version;
+  nsresult rv = infoService->GetPropertyAsInt32(NS_LITERAL_STRING("version"), &version);
+  if (NS_SUCCEEDED(rv)) {
+    ALOG("Android Version is: %d", version);
+  }
+
+  nsAutoString release_version;
+  rv = infoService->GetPropertyAsAString(NS_LITERAL_STRING("release_version"), release_version);
+  if (NS_SUCCEEDED(rv)) {
+    ALOG("Android Release Version is: %s", NS_LossyConvertUTF16toASCII(release_version).get());
+  }
+
+  nsAutoString device;
+  rv = infoService->GetPropertyAsAString(NS_LITERAL_STRING("device"), device);
+  if (NS_SUCCEEDED(rv)) {
+    ALOG("Android Device is: %s", NS_LossyConvertUTF16toASCII(device).get());
+  }
+
+  nsAutoString manufacturer;
+  rv = infoService->GetPropertyAsAString(NS_LITERAL_STRING("manufacturer"), manufacturer);
+  if (NS_SUCCEEDED(rv)) {
+    ALOG("Android Manufacturer is: %s", NS_LossyConvertUTF16toASCII(manufacturer).get());
+  }
+
+  nsAutoString hardware;
+  rv = infoService->GetPropertyAsAString(NS_LITERAL_STRING("hardware"), hardware);
+  if (NS_SUCCEEDED(rv)) {
+    ALOG("Android Hardware is: %s", NS_LossyConvertUTF16toASCII(hardware).get());
+  }
+#endif
+
+  if (!IsOmxSupported())
+    return nullptr;
+
+#if defined(ANDROID) && !defined(MOZ_WIDGET_GONK)
+  if (version >= 17) {
+    return "libomxpluginkk.so";
+  }
+  else if (version == 13 || version == 12 || version == 11) {
+    return "libomxpluginhc.so";
+  }
+  else if (version == 10 && release_version >= NS_LITERAL_STRING("2.3.6")) {
+    // Gingerbread versions from 2.3.6 and above have a different DataSource
+    // layout to those on 2.3.5 and below.
+    return "libomxplugingb.so";
+  }
+  else if (version == 10 && release_version >= NS_LITERAL_STRING("2.3.4") &&
+           device.Find("HTC") == 0) {
+    // HTC devices running Gingerbread 2.3.4+ (HTC Desire HD, HTC Evo Design, etc) seem to
+    // use a newer version of Gingerbread libstagefright than other 2.3.4 devices.
+    return "libomxplugingb.so";
+  }
+  else if (version == 9 || (version == 10 && release_version <= NS_LITERAL_STRING("2.3.5"))) {
+    // Gingerbread versions from 2.3.5 and below have a different DataSource
+    // than 2.3.6 and above.
+    return "libomxplugingb235.so";
+  }
+  else if (version == 8) {
+    // Froyo
+    return "libomxpluginfroyo.so";
+  }
+  else if (version < 8) {
+    // Below Froyo not supported
+    return nullptr;
+  }
+
+  // Ice Cream Sandwich and Jellybean
+  return "libomxplugin.so";
+
+#elif defined(ANDROID) && defined(MOZ_WIDGET_GONK)
+  return "libomxplugin.so";
+#else
+  return nullptr;
+#endif
+}
+
+MediaPluginHost::MediaPluginHost() {
+  MOZ_COUNT_CTOR(MediaPluginHost);
+
+  mResourceServer = MediaResourceServer::Start();
+
+  const char* name = GetOmxLibraryName();
+  ALOG("Loading OMX Plugin: %s", name ? name : "nullptr");
+  if (name) {
+    char *path = PR_GetLibraryFilePathname("libxul.so", (PRFuncPtr) GetOmxLibraryName);
+    PRLibrary *lib = nullptr;
+    if (path) {
+      nsAutoCString libpath(path);
+      PR_Free(path);
+      int32_t slash = libpath.RFindChar('/');
+      if (slash != kNotFound) {
+        libpath.Truncate(slash + 1);
+        libpath.Append(name);
+        lib = PR_LoadLibrary(libpath.get());
+      }
+    }
+    if (!lib)
+      lib = PR_LoadLibrary(name);
+
+    if (lib) {
+      Manifest *manifest = static_cast<Manifest *>(PR_FindSymbol(lib, "MPAPI_MANIFEST"));
+      if (manifest) {
+        mPlugins.AppendElement(manifest);
+        ALOG("OMX plugin successfully loaded");
+     }
+    }
+  }
+}
+
+MediaPluginHost::~MediaPluginHost() {
+  mResourceServer->Stop();
+  MOZ_COUNT_DTOR(MediaPluginHost);
+}
+
+bool MediaPluginHost::FindDecoder(const nsACString& aMimeType, const char* const** aCodecs)
+{
+  const char *chars;
+  size_t len = NS_CStringGetData(aMimeType, &chars, nullptr);
+  for (size_t n = 0; n < mPlugins.Length(); ++n) {
+    Manifest *plugin = mPlugins[n];
+    const char* const *codecs;
+    if (plugin->CanDecode(chars, len, &codecs)) {
+      if (aCodecs)
+        *aCodecs = codecs;
+      return true;
+    }
+  }
+  return false;
+}
+
+MPAPI::Decoder *MediaPluginHost::CreateDecoder(MediaResource *aResource, const nsACString& aMimeType)
+{
+  NS_ENSURE_TRUE(aResource, nullptr);
+
+  nsAutoPtr<Decoder> decoder(new Decoder());
+  if (!decoder) {
+    return nullptr;
+  }
+
+  const char *chars;
+  size_t len = NS_CStringGetData(aMimeType, &chars, nullptr);
+  for (size_t n = 0; n < mPlugins.Length(); ++n) {
+    Manifest *plugin = mPlugins[n];
+    const char* const *codecs;
+    if (!plugin->CanDecode(chars, len, &codecs)) {
+      continue;
+    }
+
+    nsCString url;
+    nsresult rv = mResourceServer->AddResource(aResource, url);
+    if (NS_FAILED (rv)) continue;
+
+    decoder->mResource = strdup(url.get());
+    if (plugin->CreateDecoder(&sPluginHost, decoder, chars, len)) {
+      aResource->AddRef();
+      return decoder.forget();
+    }
+  }
+
+  return nullptr;
+}
+
+void MediaPluginHost::DestroyDecoder(Decoder *aDecoder)
+{
+  aDecoder->DestroyDecoder(aDecoder);
+  char* resource = GetResource(aDecoder);
+  if (resource) {
+    // resource *shouldn't* be null, but check anyway just in case the plugin
+    // decoder does something stupid.
+    mResourceServer->RemoveResource(nsCString(resource));
+    free(resource);
+  }
+  delete aDecoder;
+}
+
+MediaPluginHost *sMediaPluginHost = nullptr;
+MediaPluginHost *GetMediaPluginHost()
+{
+  if (!sMediaPluginHost) {
+    sMediaPluginHost = new MediaPluginHost();
+  }
+  return sMediaPluginHost;
+}
+
+void MediaPluginHost::Shutdown()
+{
+  delete sMediaPluginHost;
+  sMediaPluginHost = nullptr;
+}
+
+} // namespace mozilla