| // Copyright (c) 2011 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 "ppapi/proxy/ppb_audio_proxy.h" |
| |
| #include "base/compiler_specific.h" |
| #include "base/threading/simple_thread.h" |
| #include "ppapi/c/pp_errors.h" |
| #include "ppapi/c/ppb_audio.h" |
| #include "ppapi/c/ppb_audio_config.h" |
| #include "ppapi/c/ppb_var.h" |
| #include "ppapi/c/trusted/ppb_audio_trusted.h" |
| #include "ppapi/proxy/enter_proxy.h" |
| #include "ppapi/proxy/interface_id.h" |
| #include "ppapi/proxy/plugin_dispatcher.h" |
| #include "ppapi/proxy/ppapi_messages.h" |
| #include "ppapi/shared_impl/audio_impl.h" |
| #include "ppapi/shared_impl/resource.h" |
| #include "ppapi/thunk/ppb_audio_config_api.h" |
| #include "ppapi/thunk/enter.h" |
| #include "ppapi/thunk/resource_creation_api.h" |
| #include "ppapi/thunk/thunk.h" |
| |
| using ppapi::thunk::EnterResourceNoLock; |
| using ppapi::thunk::PPB_Audio_API; |
| using ppapi::thunk::PPB_AudioConfig_API; |
| |
| namespace ppapi { |
| namespace proxy { |
| |
| class Audio : public Resource, public AudioImpl { |
| public: |
| Audio(const HostResource& audio_id, |
| PP_Resource config_id, |
| PPB_Audio_Callback callback, |
| void* user_data); |
| virtual ~Audio(); |
| |
| // Resource overrides. |
| virtual PPB_Audio_API* AsPPB_Audio_API(); |
| |
| // PPB_Audio_API implementation. |
| virtual PP_Resource GetCurrentConfig() OVERRIDE; |
| virtual PP_Bool StartPlayback() OVERRIDE; |
| virtual PP_Bool StopPlayback() OVERRIDE; |
| virtual int32_t OpenTrusted(PP_Resource config_id, |
| PP_CompletionCallback create_callback) OVERRIDE; |
| virtual int32_t GetSyncSocket(int* sync_socket) OVERRIDE; |
| virtual int32_t GetSharedMemory(int* shm_handle, uint32_t* shm_size) OVERRIDE; |
| |
| private: |
| // Owning reference to the current config object. This isn't actually used, |
| // we just dish it out as requested by the plugin. |
| PP_Resource config_; |
| |
| DISALLOW_COPY_AND_ASSIGN(Audio); |
| }; |
| |
| Audio::Audio(const HostResource& audio_id, |
| PP_Resource config_id, |
| PPB_Audio_Callback callback, |
| void* user_data) |
| : Resource(audio_id), |
| config_(config_id) { |
| SetCallback(callback, user_data); |
| PluginResourceTracker::GetInstance()->AddRefResource(config_); |
| } |
| |
| Audio::~Audio() { |
| PluginResourceTracker::GetInstance()->ReleaseResource(config_); |
| } |
| |
| PPB_Audio_API* Audio::AsPPB_Audio_API() { |
| return this; |
| } |
| |
| PP_Resource Audio::GetCurrentConfig() { |
| // AddRef for the caller. |
| PluginResourceTracker::GetInstance()->AddRefResource(config_); |
| return config_; |
| } |
| |
| PP_Bool Audio::StartPlayback() { |
| if (playing()) |
| return PP_TRUE; |
| SetStartPlaybackState(); |
| PluginDispatcher::GetForResource(this)->Send( |
| new PpapiHostMsg_PPBAudio_StartOrStop( |
| INTERFACE_ID_PPB_AUDIO, host_resource(), true)); |
| return PP_TRUE; |
| } |
| |
| PP_Bool Audio::StopPlayback() { |
| if (!playing()) |
| return PP_TRUE; |
| PluginDispatcher::GetForResource(this)->Send( |
| new PpapiHostMsg_PPBAudio_StartOrStop( |
| INTERFACE_ID_PPB_AUDIO, host_resource(), false)); |
| SetStopPlaybackState(); |
| return PP_TRUE; |
| } |
| |
| int32_t Audio::OpenTrusted(PP_Resource config_id, |
| PP_CompletionCallback create_callback) { |
| return PP_ERROR_NOTSUPPORTED; // Don't proxy the trusted interface. |
| } |
| |
| int32_t Audio::GetSyncSocket(int* sync_socket) { |
| return PP_ERROR_NOTSUPPORTED; // Don't proxy the trusted interface. |
| } |
| |
| int32_t Audio::GetSharedMemory(int* shm_handle, uint32_t* shm_size) { |
| return PP_ERROR_NOTSUPPORTED; // Don't proxy the trusted interface. |
| } |
| |
| namespace { |
| |
| base::PlatformFile IntToPlatformFile(int32_t handle) { |
| // TODO(piman/brettw): Change trusted interface to return a PP_FileHandle, |
| // those casts are ugly. |
| #if defined(OS_WIN) |
| return reinterpret_cast<HANDLE>(static_cast<intptr_t>(handle)); |
| #elif defined(OS_POSIX) |
| return handle; |
| #else |
| #error Not implemented. |
| #endif |
| } |
| |
| } // namespace |
| |
| PPB_Audio_Proxy::PPB_Audio_Proxy(Dispatcher* dispatcher) |
| : InterfaceProxy(dispatcher), |
| callback_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) { |
| } |
| |
| PPB_Audio_Proxy::~PPB_Audio_Proxy() { |
| } |
| |
| // static |
| PP_Resource PPB_Audio_Proxy::CreateProxyResource( |
| PP_Instance instance_id, |
| PP_Resource config_id, |
| PPB_Audio_Callback audio_callback, |
| void* user_data) { |
| PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance_id); |
| if (!dispatcher) |
| return 0; |
| |
| EnterResourceNoLock<PPB_AudioConfig_API> config(config_id, true); |
| if (config.failed()) |
| return 0; |
| |
| HostResource result; |
| dispatcher->Send(new PpapiHostMsg_PPBAudio_Create( |
| INTERFACE_ID_PPB_AUDIO, instance_id, |
| config.object()->GetSampleRate(), config.object()->GetSampleFrameCount(), |
| &result)); |
| if (result.is_null()) |
| return 0; |
| |
| return (new Audio(result, config_id, |
| audio_callback, user_data))->GetReference(); |
| } |
| |
| bool PPB_Audio_Proxy::OnMessageReceived(const IPC::Message& msg) { |
| bool handled = true; |
| IPC_BEGIN_MESSAGE_MAP(PPB_Audio_Proxy, msg) |
| IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBAudio_Create, OnMsgCreate) |
| IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBAudio_StartOrStop, |
| OnMsgStartOrStop) |
| IPC_MESSAGE_HANDLER(PpapiMsg_PPBAudio_NotifyAudioStreamCreated, |
| OnMsgNotifyAudioStreamCreated) |
| IPC_MESSAGE_UNHANDLED(handled = false) |
| IPC_END_MESSAGE_MAP() |
| return handled; |
| } |
| |
| void PPB_Audio_Proxy::OnMsgCreate(PP_Instance instance_id, |
| int32_t sample_rate, |
| uint32_t sample_frame_count, |
| HostResource* result) { |
| thunk::EnterFunction<thunk::ResourceCreationAPI> resource_creation( |
| instance_id, true); |
| if (resource_creation.failed()) |
| return; |
| |
| // Make the resource and get the API pointer to its trusted interface. |
| result->SetHostResource( |
| instance_id, |
| resource_creation.functions()->CreateAudioTrusted(instance_id)); |
| if (result->is_null()) |
| return; |
| |
| // At this point, we've set the result resource, and this is a sync request. |
| // Anything below this point must issue the AudioChannelConnected callback |
| // to the browser. Since that's an async message, it will be issued back to |
| // the plugin after the Create function returns (which is good because it |
| // would be weird to get a connected message with a failure code for a |
| // resource you haven't finished creating yet). |
| // |
| // The ...ForceCallback class will help ensure the callback is always called. |
| // All error cases must call SetResult on this class. |
| EnterHostFromHostResourceForceCallback<PPB_Audio_API> enter( |
| *result, callback_factory_, |
| &PPB_Audio_Proxy::AudioChannelConnected, *result); |
| if (enter.failed()) |
| return; // When enter fails, it will internally schedule the callback. |
| |
| // Make an audio config object. |
| PP_Resource audio_config_res = |
| resource_creation.functions()->CreateAudioConfig( |
| instance_id, static_cast<PP_AudioSampleRate>(sample_rate), |
| sample_frame_count); |
| if (!audio_config_res) { |
| enter.SetResult(PP_ERROR_FAILED); |
| return; |
| } |
| |
| // Initiate opening the audio object. |
| enter.SetResult(enter.object()->OpenTrusted(audio_config_res, |
| enter.callback())); |
| |
| // Clean up the temporary audio config resource we made. |
| const PPB_Core* core = static_cast<const PPB_Core*>( |
| dispatcher()->local_get_interface()(PPB_CORE_INTERFACE)); |
| core->ReleaseResource(audio_config_res); |
| } |
| |
| void PPB_Audio_Proxy::OnMsgStartOrStop(const HostResource& audio_id, |
| bool play) { |
| EnterHostFromHostResource<PPB_Audio_API> enter(audio_id); |
| if (enter.failed()) |
| return; |
| if (play) |
| enter.object()->StartPlayback(); |
| else |
| enter.object()->StopPlayback(); |
| } |
| |
| // Processed in the plugin (message from host). |
| void PPB_Audio_Proxy::OnMsgNotifyAudioStreamCreated( |
| const HostResource& audio_id, |
| int32_t result_code, |
| IPC::PlatformFileForTransit socket_handle, |
| base::SharedMemoryHandle handle, |
| uint32_t length) { |
| EnterPluginFromHostResource<PPB_Audio_API> enter(audio_id); |
| if (enter.failed() || result_code != PP_OK) { |
| // The caller may still have given us these handles in the failure case. |
| // The easiest way to clean these up is to just put them in the objects |
| // and then close them. This failure case is not performance critical. |
| base::SyncSocket temp_socket( |
| IPC::PlatformFileForTransitToPlatformFile(socket_handle)); |
| base::SharedMemory temp_mem(handle, false); |
| } else { |
| static_cast<Audio*>(enter.object())->SetStreamInfo( |
| handle, length, |
| IPC::PlatformFileForTransitToPlatformFile(socket_handle)); |
| } |
| } |
| |
| void PPB_Audio_Proxy::AudioChannelConnected( |
| int32_t result, |
| const HostResource& resource) { |
| IPC::PlatformFileForTransit socket_handle = |
| IPC::InvalidPlatformFileForTransit(); |
| base::SharedMemoryHandle shared_memory = IPC::InvalidPlatformFileForTransit(); |
| uint32_t shared_memory_length = 0; |
| |
| int32_t result_code = result; |
| if (result_code == PP_OK) { |
| result_code = GetAudioConnectedHandles(resource, &socket_handle, |
| &shared_memory, |
| &shared_memory_length); |
| } |
| |
| // Send all the values, even on error. This simplifies some of our cleanup |
| // code since the handles will be in the other process and could be |
| // inconvenient to clean up. Our IPC code will automatically handle this for |
| // us, as long as the remote side always closes the handles it receives |
| // (in OnMsgNotifyAudioStreamCreated), even in the failure case. |
| dispatcher()->Send(new PpapiMsg_PPBAudio_NotifyAudioStreamCreated( |
| INTERFACE_ID_PPB_AUDIO, resource, result_code, socket_handle, |
| shared_memory, shared_memory_length)); |
| } |
| |
| int32_t PPB_Audio_Proxy::GetAudioConnectedHandles( |
| const HostResource& resource, |
| IPC::PlatformFileForTransit* foreign_socket_handle, |
| base::SharedMemoryHandle* foreign_shared_memory_handle, |
| uint32_t* shared_memory_length) { |
| // Get the audio interface which will give us the handles. |
| EnterHostFromHostResource<PPB_Audio_API> enter(resource); |
| if (enter.failed()) |
| return PP_ERROR_NOINTERFACE; |
| |
| // Get the socket handle for signaling. |
| int32_t socket_handle; |
| int32_t result = enter.object()->GetSyncSocket(&socket_handle); |
| if (result != PP_OK) |
| return result; |
| |
| // socket_handle doesn't belong to us: don't close it. |
| *foreign_socket_handle = dispatcher()->ShareHandleWithRemote( |
| IntToPlatformFile(socket_handle), false); |
| if (*foreign_socket_handle == IPC::InvalidPlatformFileForTransit()) |
| return PP_ERROR_FAILED; |
| |
| // Get the shared memory for the buffer. |
| int shared_memory_handle; |
| result = enter.object()->GetSharedMemory(&shared_memory_handle, |
| shared_memory_length); |
| if (result != PP_OK) |
| return result; |
| |
| // shared_memory_handle doesn't belong to us: don't close it. |
| *foreign_shared_memory_handle = dispatcher()->ShareHandleWithRemote( |
| IntToPlatformFile(shared_memory_handle), false); |
| if (*foreign_shared_memory_handle == IPC::InvalidPlatformFileForTransit()) |
| return PP_ERROR_FAILED; |
| |
| return PP_OK; |
| } |
| |
| } // namespace proxy |
| } // namespace ppapi |