Vp9 decoder mft support for AMD apu/gpu

gpu/command_buffer/service/gpu_preferences.h

Index: gpu/command_buffer/service/gpu_preferences.h
diff --git a/gpu/command_buffer/service/gpu_preferences.h b/gpu/command_buffer/service/gpu_preferences.h
index 67f5b92999e5d213d92e33ed38f795984e3f6249..e5264b31a3521a47a14cc7ad368a23706bf00df7 100644
--- a/gpu/command_buffer/service/gpu_preferences.h
+++ b/gpu/command_buffer/service/gpu_preferences.h
@@ -48,8 +48,9 @@ struct GPU_EXPORT GpuPreferences {
 #endif
 
 #if defined(OS_WIN)
-  // Enables experimental hardware acceleration for VP8/VP9 video decoding.
-  bool enable_accelerated_vpx_decode = false;
+  // Enables experimental hardware acceleration for VP8/VP9 video decoding
+  // bitmask - 0x1=Intel; 0x2=AMD; 0x3=both
+  uint32_t enable_accelerated_vpx_decode = 0;

[jbauman, 2016/06/28 20:24:22]

Use an enum for this instead.

[kplum, 2016/06/28 21:35:14]

Acknowledged.

[kplum, 2016/06/29 15:43:18]

If I try to add an enum type member to the structure I get compilation errors
due to IPC templates:

src\ipc\ipc_message_utils.h(90): error C2039: 'GetSize': is not a member of
'IPC::ParamTraits<Type>'
src\ipc\ipc_message_utils.h(90): note: see declaration of
'IPC::ParamTraits<Type>'
src\content\common\gpu_host_messages.h(87): note: see reference to function
template instantiation 'void
IPC::GetParamSize<gpu::GpuPreferences::VpxHardwareVendors>(base::PickleSizer
*,const P &)' being compiled
        with
        [
            P=gpu::GpuPreferences::VpxHardwareVendors
        ]

It looks like every type used in IPC structures needs to have corresponding
template implementations in src\ipc\ipc_message_utils.h, but I couldn't find any
other case this is done for enums. I can keep the struct member type as
uint32_t, but still use the enum values... Unless there is something else I'm
missing?

 
   // Enables support for avoiding copying DXGI NV12 textures.
   bool enable_zero_copy_dxgi_video = false;