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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
      6 #define CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
      7 
      8 #include <string>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/compiler_specific.h"
     12 #include "base/memory/scoped_ptr.h"
     13 #include "base/memory/shared_memory.h"
     14 #include "base/sync_socket.h"
     15 #include "content/renderer/pepper/pepper_device_enumeration_host_helper.h"
     16 #include "ipc/ipc_platform_file.h"
     17 #include "ppapi/c/ppb_audio_config.h"
     18 #include "ppapi/host/host_message_context.h"
     19 #include "ppapi/host/resource_host.h"
     20 
     21 namespace content {
     22 class PepperPlatformAudioInput;
     23 class RendererPpapiHostImpl;
     24 
     25 class PepperAudioInputHost : public ppapi::host::ResourceHost {
     26  public:
     27   PepperAudioInputHost(RendererPpapiHostImpl* host,
     28                        PP_Instance instance,
     29                        PP_Resource resource);
     30   virtual ~PepperAudioInputHost();
     31 
     32   virtual int32_t OnResourceMessageReceived(
     33       const IPC::Message& msg,
     34       ppapi::host::HostMessageContext* context) OVERRIDE;
     35 
     36   // Called when the stream is created.
     37   void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
     38                      size_t shared_memory_size,
     39                      base::SyncSocket::Handle socket);
     40   void StreamCreationFailed();
     41 
     42  private:
     43   int32_t OnOpen(ppapi::host::HostMessageContext* context,
     44                  const std::string& device_id,
     45                  PP_AudioSampleRate sample_rate,
     46                  uint32_t sample_frame_count);
     47   int32_t OnStartOrStop(ppapi::host::HostMessageContext* context, bool capture);
     48   int32_t OnClose(ppapi::host::HostMessageContext* context);
     49 
     50   void OnOpenComplete(int32_t result,
     51                       base::SharedMemoryHandle shared_memory_handle,
     52                       size_t shared_memory_size,
     53                       base::SyncSocket::Handle socket_handle);
     54 
     55   int32_t GetRemoteHandles(
     56       const base::SyncSocket& socket,
     57       const base::SharedMemory& shared_memory,
     58       IPC::PlatformFileForTransit* remote_socket_handle,
     59       base::SharedMemoryHandle* remote_shared_memory_handle);
     60 
     61   void Close();
     62 
     63   void SendOpenReply(int32_t result);
     64 
     65   // Non-owning pointer.
     66   RendererPpapiHostImpl* renderer_ppapi_host_;
     67 
     68   ppapi::host::ReplyMessageContext open_context_;
     69 
     70   // Audio input object that we delegate audio IPC through.
     71   // We don't own this pointer but are responsible for calling Shutdown on it.
     72   PepperPlatformAudioInput* audio_input_;
     73 
     74   PepperDeviceEnumerationHostHelper enumeration_helper_;
     75 
     76   DISALLOW_COPY_AND_ASSIGN(PepperAudioInputHost);
     77 };
     78 
     79 }  // namespace content
     80 
     81 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
     82