Pepper API implementation for output protection.

chromeos/display/real_output_configurator_delegate.h

 // Copyright (c) 2013 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 CHROMEOS_DISPLAY_REAL_OUTPUT_CONFIGURATOR_DELEGATE_H_
 #define CHROMEOS_DISPLAY_REAL_OUTPUT_CONFIGURATOR_DELEGATE_H_
 
+#include <map>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chromeos/display/output_configurator.h"
+#include "ppapi/c/private/ppb_output_protection_private.h"
 
 typedef XID Window;
 
 struct _XDisplay;
 typedef struct _XDisplay Display;
 struct _XRROutputInfo;
 typedef _XRROutputInfo XRROutputInfo;
 struct _XRRScreenResources;
 typedef _XRRScreenResources XRRScreenResources;
 
+namespace chrome {
+class PepperOutputProtectionHost;
+}  // namespace chrome
+
 namespace chromeos {
 
 class RealOutputConfiguratorDelegate : public OutputConfigurator::Delegate {
  public:
   RealOutputConfiguratorDelegate();
   virtual ~RealOutputConfiguratorDelegate();
 
   // OutputConfigurator::Delegate overrides:
   virtual void SetPanelFittingEnabled(bool enabled) OVERRIDE;
   virtual void InitXRandRExtension(int* event_base) OVERRIDE;
@@ skipping 13 matching lines @@
       int x,
       int y) OVERRIDE;
   virtual void CreateFrameBuffer(
       int width,
       int height,
       const std::vector<OutputConfigurator::OutputSnapshot>& outputs) OVERRIDE;
   virtual void ConfigureCTM(
       int touch_device_id,
       const OutputConfigurator::CoordinateTransformation& ctm) OVERRIDE;
   virtual void SendProjectingStateToPowerManager(bool projecting) OVERRIDE;
+  virtual bool QueryOutputProtectionStatus(
+      const chrome::PepperOutputProtectionHost* client,
+      uint32_t* link_mask,
+      uint32_t* protection_mask) OVERRIDE;
+  virtual bool EnableOutputProtection(
+      const chrome::PepperOutputProtectionHost* client,
+      uint32_t desired_method_mask) OVERRIDE;
 
  private:
+  typedef std::map<const chrome::PepperOutputProtectionHost*, uint32_t>

[ddorwin, 2013/09/12 04:22:13]

Maybe explain the two values.

[kcwu, 2013/09/12 18:22:08]

Done.

+      ProtectionRequests;
+
+  enum HDCPState {
+    HDCP_State_Undesired,
+    HDCP_State_Desired,
+    HDCP_State_Enabled
+  };
+
   // Gets details corresponding to |mode|. Parameters may be NULL. Returns
   // true on success.
   bool GetModeDetails(RRMode mode, int* width, int* height, bool* interlaced);
 
   // Helper method for GetOutputs() that returns an OutputSnapshot struct based
   // on the passed-in information. Further initialization is required (e.g.
   // |selected_mode|, |mirror_mode|, and |touch_device_id|).
   OutputConfigurator::OutputSnapshot InitOutputSnapshot(
       RROutput id,
       XRROutputInfo* info,
@@ skipping 30 matching lines @@
                               RRMode* external_mirror_mode);
 
   // Searches for touchscreens among input devices,
   // and tries to match them up to screens in |outputs|.
   // |outputs| is an array of detected screens.
   // If a touchscreen with same resolution as an output's native mode
   // is detected, its id will be stored in this output.
   void GetTouchscreens(
       std::vector<OutputConfigurator::OutputSnapshot>* outputs);
 
+  // Get HDCP state of output.
+  bool GetHDCPState(RROutput id, HDCPState* state);
+  // Set HDCP state of output.
+  bool SetHDCPState(RROutput id, HDCPState state);
+  // Get types of connected output links.
+  bool GetOutputLinkTypes(
+      std::vector<PP_OutputProtectionLinkType_Private>* link_type);
+  // Get the bit-mask of connected output links.
+  bool GetOutputLinkMask(
+      const std::vector<PP_OutputProtectionLinkType_Private>& link_types,
+      uint32_t* link_mask);
+  // Get the bit-mask of enabled protection methods.
+  bool GetProtectionMethods(

[ddorwin, 2013/09/12 04:22:13]

While the above method might be useful on its own (though probably currently
unused), it seems this is only useful when returning both outputs. Is there a
reason these are separate?

[kcwu, 2013/09/12 18:22:08]

These methods are rewritten and restructured.

+      const std::vector<PP_OutputProtectionLinkType_Private>& link_types,
+      uint32_t* protection_mask);
+  // Get the bit-mask of all requested protection methods.

[ddorwin, 2013/09/12 04:22:13]

I didn't understand what this function did (from the comment or name) until I
looked at the implementation. It should somehow indicate that it's the OR of all
clients.

[kcwu, 2013/09/12 18:22:08]

These methods are rewritten.

+  uint32_t GetCombinedProtectionRequest();
+
   Display* display_;
   Window window_;
 
   // Initialized when the server is grabbed and freed when it's ungrabbed.
   XRRScreenResources* screen_;
 
   // Used to enable modes which rely on panel fitting.
   bool is_panel_fitting_enabled_;
 
+  // Output protection requests of each client.
+  ProtectionRequests client_protection_request_;

[ddorwin, 2013/09/12 04:22:13]

...requests_
          ^

[kcwu, 2013/09/12 18:22:08]

Done.

+
   DISALLOW_COPY_AND_ASSIGN(RealOutputConfiguratorDelegate);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DISPLAY_REAL_OUTPUT_CONFIGURATOR_DELEGATE_H_