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// Copyright (c) 2017 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 CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_OUTPUT_HOST_H_
#define CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_OUTPUT_HOST_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <string>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/shared_memory.h"
#include "base/sync_socket.h"
#include "content/public/renderer/plugin_instance_throttler.h"
#include "content/renderer/pepper/pepper_device_enumeration_host_helper.h"
#include "ipc/ipc_platform_file.h"
#include "ppapi/c/ppb_audio_config.h"
#include "ppapi/host/host_message_context.h"
#include "ppapi/host/resource_host.h"
namespace content {
class PepperPlatformAudioOutputDev;
class RendererPpapiHostImpl;
class PepperAudioOutputHost : public ppapi::host::ResourceHost,
public PluginInstanceThrottler::Observer {
public:
PepperAudioOutputHost(RendererPpapiHostImpl* host,
PP_Instance instance,
PP_Resource resource);
~PepperAudioOutputHost() override;
int32_t OnResourceMessageReceived(
const IPC::Message& msg,
ppapi::host::HostMessageContext* context) override;
// Called when the stream is created.
void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
size_t shared_memory_size,
base::SyncSocket::Handle socket);
void StreamCreationFailed();
void SetVolume(double volume);
private:
int32_t OnOpen(ppapi::host::HostMessageContext* context,
const std::string& device_id,
PP_AudioSampleRate sample_rate,
uint32_t sample_frame_count);
int32_t OnStartOrStop(ppapi::host::HostMessageContext* context,
bool playback);
int32_t OnClose(ppapi::host::HostMessageContext* context);
void OnOpenComplete(int32_t result,
base::SharedMemoryHandle shared_memory_handle,
size_t shared_memory_size,
base::SyncSocket::Handle socket_handle);
int32_t GetRemoteHandles(
const base::SyncSocket& socket,
const base::SharedMemory& shared_memory,
IPC::PlatformFileForTransit* remote_socket_handle,
base::SharedMemoryHandle* remote_shared_memory_handle);
void Close();
void SendOpenReply(int32_t result);
// PluginInstanceThrottler::Observer implementation.
void OnThrottleStateChange() override;
// Starts the deferred playback and unsubscribes from the throttler.
void StartDeferredPlayback();
// Non-owning pointer.
RendererPpapiHostImpl* renderer_ppapi_host_;
ppapi::host::ReplyMessageContext open_context_;
// Audio output object that we delegate audio IPC through.
// We don't own this pointer but are responsible for calling Shutdown on it.
PepperPlatformAudioOutputDev* audio_output_;
// Stream is playing, but throttled due to Plugin Power Saver.
bool playback_throttled_;
PepperDeviceEnumerationHostHelper enumeration_helper_;
DISALLOW_COPY_AND_ASSIGN(PepperAudioOutputHost);
};
} // namespace content
#endif // CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_OUTPUT_HOST_H_
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