15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/audio/audio_output_proxy.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 8ca12bfac764ba476d6cd062bf1dde12cc64c3f40Ben Murdoch#include "base/message_loop/message_loop.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/audio/audio_manager.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/audio/audio_output_dispatcher.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace media { 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioOutputProxy::AudioOutputProxy(AudioOutputDispatcher* dispatcher) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : dispatcher_(dispatcher), 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_(kCreated), 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) volume_(1.0) { 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)AudioOutputProxy::~AudioOutputProxy() { 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(state_ == kCreated || state_ == kClosed) << "State is: " << state_; 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool AudioOutputProxy::Open() { 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_EQ(state_, kCreated); 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!dispatcher_->OpenStream()) { 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = kOpenError; 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = kOpened; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputProxy::Start(AudioSourceCallback* callback) { 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // We need to support both states since the callback may not handle OnError() 422a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // immediately (or at all). It's also possible for subsequent StartStream() 432a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // calls to succeed after failing, so we allow it to be called again. 442a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) DCHECK(state_ == kOpened || state_ == kStartError); 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!dispatcher_->StartStream(callback, this)) { 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = kStartError; 482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) callback->OnError(this); 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = kPlaying; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputProxy::Stop() { 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (state_ != kPlaying) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dispatcher_->StopStream(this); 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = kOpened; 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputProxy::SetVolume(double volume) { 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) volume_ = volume; 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dispatcher_->StreamVolumeSet(this, volume); 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputProxy::GetVolume(double* volume) { 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *volume = volume_; 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void AudioOutputProxy::Close() { 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(state_ == kCreated || state_ == kOpenError || state_ == kOpened || 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ == kStartError); 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // kStartError means OpenStream() succeeded and the stream must be closed 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // before destruction. 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (state_ != kCreated && state_ != kOpenError) 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dispatcher_->CloseStream(this); 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) state_ = kClosed; 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Delete the object now like is done in the Close() implementation of 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // physical stream objects. If we delete the object via DeleteSoon, we 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // unnecessarily complicate the Shutdown procedure of the 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // dispatcher+audio manager. 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delete this; 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace media 94