Chromecast: communicate HDMI-sink codec changes over IPC.

R=lcwu@chromium.org,servolk@chromium.org,tsepez@chromium.org
BUG=

Review URL: https://codereview.chromium.org/971913002

Cr-Commit-Position: refs/heads/master@{#319078}

chromecast/chromecast.gyp

@@ -227,6 +227,9 @@
         'common/cast_resource_delegate.h',
         'common/chromecast_switches.cc',
         'common/chromecast_switches.h',
+        'common/media/cast_messages.h',
+        'common/media/cast_message_generator.cc',
+        'common/media/cast_message_generator.h',
         'common/platform_client_auth.h',
         'common/pref_names.cc',
         'common/pref_names.h',
@@ -238,6 +241,8 @@
         'renderer/cast_render_process_observer.h',
         'renderer/key_systems_cast.cc',
         'renderer/key_systems_cast.h',
+        'renderer/media/capabilities_message_filter.cc',
+        'renderer/media/capabilities_message_filter.h',
       ],
       'conditions': [
         ['chromecast_branding=="Chrome"', {

chromecast/common/chromecast_switches.cc

@@ -9,6 +9,9 @@ namespace switches {
 // Enable the CMA media pipeline.
 const char kEnableCmaMediaPipeline[] = "enable-cma-media-pipeline";
 
+// The bitmask of codecs (media_caps.h) supported by the current HDMI sink.
+const char kHdmiSinkSupportedCodecs[] = "hdmi-sink-supported-codecs";
+
 #if defined(OS_ANDROID)
 // Enable file accesses for debug.
 const char kEnableLocalFileAccesses[] = "enable-local-file-accesses";

chromecast/common/chromecast_switches.h

@@ -9,7 +9,9 @@
 
 namespace switches {
 
+// Media switches
 extern const char kEnableCmaMediaPipeline[];
+extern const char kHdmiSinkSupportedCodecs[];
 
 #if defined(OS_ANDROID)
 // Content-implementation switches

chromecast/common/media/cast_message_generator.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Get basic type definitions.
+#define IPC_MESSAGE_IMPL
+#include "chromecast/common/media/cast_message_generator.h"
+
+// Generate constructors.
+#include "ipc/struct_constructor_macros.h"
+#include "chromecast/common/media/cast_message_generator.h"
+
+// Generate destructors.
+#include "ipc/struct_destructor_macros.h"
+#include "chromecast/common/media/cast_message_generator.h"

chromecast/common/media/cast_message_generator.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Multiply-included file, hence no include guard.
+
+#include "chromecast/common/media/cast_messages.h"
+

chromecast/common/media/cast_messages.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// IPC messages related to media on Chromecast.
+// Multiply-included message file, hence no include guard.
+
+#include "ipc/ipc_message_macros.h"
+
+#undef IPC_MESSAGE_EXPORT
+#define IPC_MESSAGE_EXPORT
+#define IPC_MESSAGE_START CastMediaMsgStart
+
+// Messages sent from the browser to the renderer process.
+
+IPC_MESSAGE_CONTROL1(CmaMsg_UpdateSupportedHdmiSinkCodecs,
+                     int /* Codec support, bitmask of media_caps.h values */)

chromecast/media/base/media_caps.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chromecast/media/base/media_caps.h"
+
+namespace media {
+
+namespace {
+int g_hdmi_codecs = 0;
+}  // namespace
+
+void SetHdmiSinkCodecs(int codecs_mask) {
+  g_hdmi_codecs = codecs_mask;
+}
+
+bool HdmiSinkSupportsAC3() {
+  return g_hdmi_codecs & HdmiSinkCodec::kSinkCodecAc3;
+}
+
+bool HdmiSinkSupportsDTS() {
+  return g_hdmi_codecs & HdmiSinkCodec::kSinkCodecDts;
+}
+
+bool HdmiSinkSupportsDTSHD() {
+  return g_hdmi_codecs & HdmiSinkCodec::kSinkCodecDtsHd;
+}
+
+bool HdmiSinkSupportsEAC3() {
+  return g_hdmi_codecs & HdmiSinkCodec::kSinkCodecEac3;
+}
+
+bool HdmiSinkSupportsPcmSurroundSound() {
+  return g_hdmi_codecs & HdmiSinkCodec::kSinkCodecPcmSurroundSound;
+}
+
+}  // namespace media
+

chromecast/media/base/media_caps.h

@@ -7,6 +7,18 @@
 
 namespace media {
 
+enum HdmiSinkCodec {
+  kSinkCodecAc3 = 1,
+  kSinkCodecDts = 1 << 1,
+  kSinkCodecDtsHd = 1 << 2,
+  kSinkCodecEac3 = 1 << 3,
+  kSinkCodecPcmSurroundSound = 1 << 4,
+};
+
+// Records the known supported codecs for the current HDMI sink, as a bit mask
+// of HdmiSinkCodec values.
+void SetHdmiSinkCodecs(int codecs_mask);
+
 bool HdmiSinkSupportsAC3();
 bool HdmiSinkSupportsDTS();
 bool HdmiSinkSupportsDTSHD();

chromecast/media/media.gyp

@@ -22,6 +22,8 @@
         'base/decrypt_context_clearkey.h',
         'base/key_systems_common.cc',
         'base/key_systems_common.h',
+        'base/media_caps.cc',
+        'base/media_caps.h',
         'base/switching_media_renderer.cc',
         'base/switching_media_renderer.h',
       ],

chromecast/renderer/cast_content_renderer_client.cc

@@ -8,8 +8,10 @@
 
 #include "base/command_line.h"
 #include "base/memory/memory_pressure_listener.h"
+#include "base/strings/string_number_conversions.h"
 #include "chromecast/common/chromecast_switches.h"
 #include "chromecast/crash/cast_crash_keys.h"
+#include "chromecast/media/base/media_caps.h"
 #include "chromecast/renderer/cast_media_load_deferrer.h"
 #include "chromecast/renderer/cast_render_process_observer.h"
 #include "chromecast/renderer/key_systems_cast.h"
@@ -107,6 +109,16 @@ void CastContentRendererClient::RenderThreadStarted() {
   PlatformPollFreemem();
 #endif
 
+  // Set the initial known codecs mask.
+  if (command_line->HasSwitch(switches::kHdmiSinkSupportedCodecs)) {
+    int hdmi_codecs_mask;
+    if (base::StringToInt(command_line->GetSwitchValueASCII(
+                              switches::kHdmiSinkSupportedCodecs),
+                          &hdmi_codecs_mask)) {
+      ::media::SetHdmiSinkCodecs(hdmi_codecs_mask);
+    }
+  }
+
   cast_observer_.reset(
       new CastRenderProcessObserver(PlatformGetRendererMessageFilters()));
 

chromecast/renderer/cast_render_process_observer.cc

@@ -4,6 +4,7 @@
 
 #include "chromecast/renderer/cast_render_process_observer.h"
 
+#include "chromecast/renderer/media/capabilities_message_filter.h"
 #include "chromecast/renderer/media/cma_message_filter_proxy.h"
 #include "content/public/renderer/render_thread.h"
 
@@ -31,6 +32,8 @@ void CastRenderProcessObserver::CreateCustomFilters() {
       new media::CmaMessageFilterProxy(thread->GetIOMessageLoopProxy());
   thread->AddFilter(cma_message_filter_proxy_.get());
 #endif  // !defined(OS_ANDROID)
+  capabilities_message_filter_ = new CapabilitiesMessageFilter;
+  thread->AddFilter(capabilities_message_filter_.get());
   for (const auto& filter : platform_message_filters_) {
     thread->AddFilter(filter.get());
   }
@@ -41,9 +44,13 @@ void CastRenderProcessObserver::OnRenderProcessShutdown() {
 #if !defined(OS_ANDROID)
   if (cma_message_filter_proxy_.get()) {
     thread->RemoveFilter(cma_message_filter_proxy_.get());
-    cma_message_filter_proxy_ = NULL;
+    cma_message_filter_proxy_ = nullptr;
   }
 #endif  // !defined(OS_ANDROID)
+  if (capabilities_message_filter_.get()) {
+    thread->RemoveFilter(capabilities_message_filter_.get());
+    capabilities_message_filter_ = nullptr;
+  }
   for (auto& filter : platform_message_filters_) {
     if (filter.get()) {
       thread->RemoveFilter(filter.get());

chromecast/renderer/cast_render_process_observer.h

@@ -16,6 +16,7 @@ class MessageFilter;
 }
 
 namespace chromecast {
+class CapabilitiesMessageFilter;
 namespace media {
 class CmaMessageFilterProxy;
 }
@@ -38,6 +39,7 @@ class CastRenderProcessObserver : public content::RenderProcessObserver {
 #if !defined(OS_ANDROID)
   scoped_refptr<media::CmaMessageFilterProxy> cma_message_filter_proxy_;
 #endif  // !defined(OS_ANDROID)
+  scoped_refptr<CapabilitiesMessageFilter> capabilities_message_filter_;
   std::vector<scoped_refptr<IPC::MessageFilter>> platform_message_filters_;
 
   DISALLOW_COPY_AND_ASSIGN(CastRenderProcessObserver);

chromecast/renderer/media/capabilities_message_filter.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chromecast/renderer/media/capabilities_message_filter.h"
+
+#include "chromecast/common/media/cast_messages.h"
+#include "chromecast/media/base/media_caps.h"
+
+namespace chromecast {
+
+CapabilitiesMessageFilter::CapabilitiesMessageFilter() {
+}
+
+CapabilitiesMessageFilter::~CapabilitiesMessageFilter() {
+}
+
+bool CapabilitiesMessageFilter::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(CapabilitiesMessageFilter, message)
+    IPC_MESSAGE_HANDLER(CmaMsg_UpdateSupportedHdmiSinkCodecs,
+                        OnUpdateSupportedHdmiSinkCodecs)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void CapabilitiesMessageFilter::OnUpdateSupportedHdmiSinkCodecs(int codecs) {
+  ::media::SetHdmiSinkCodecs(codecs);
+}
+
+}  // namespace chromecast

chromecast/renderer/media/capabilities_message_filter.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROMECAST_RENDERER_MEDIA_CAPABILITIES_MESSAGE_FILTER_H_
+#define CHROMECAST_RENDERER_MEDIA_CAPABILITIES_MESSAGE_FILTER_H_
+
+#include "ipc/message_filter.h"
+
+namespace chromecast {
+
+class CapabilitiesMessageFilter : public IPC::MessageFilter {
+ public:
+  CapabilitiesMessageFilter();
+
+  // IPC::ChannelProxy::MessageFilter implementation:
+  bool OnMessageReceived(const IPC::Message& message) override;
+
+ private:
+  ~CapabilitiesMessageFilter() override;
+
+  void OnUpdateSupportedHdmiSinkCodecs(int codecs);
+
+  DISALLOW_COPY_AND_ASSIGN(CapabilitiesMessageFilter);
+};
+
+}  // namespace chromecast
+
+#endif  // CHROMECAST_RENDERER_MEDIA_CAPABILITIES_MESSAGE_FILTER_H_