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// Copyright (c) 2010 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 "chrome/browser/speech/speech_input_manager.h"
#include "app/l10n_util.h"
#include "base/ref_counted.h"
#include "base/singleton.h"
#include "chrome/browser/chrome_thread.h"
#include "chrome/browser/speech/speech_input_bubble_controller.h"
#include "chrome/browser/speech/speech_recognizer.h"
#include "chrome/browser/tab_contents/infobar_delegate.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/browser/tab_contents/tab_util.h"
#include "grit/generated_resources.h"
#include "media/audio/audio_manager.h"
#include <map>
namespace speech_input {
class SpeechInputManagerImpl : public SpeechInputManager,
public SpeechInputBubbleControllerDelegate,
public SpeechRecognizerDelegate {
public:
// SpeechInputManager methods.
virtual void StartRecognition(SpeechInputManagerDelegate* delegate,
int caller_id,
int render_process_id,
int render_view_id,
const gfx::Rect& element_rect);
virtual void CancelRecognition(int caller_id);
virtual void StopRecording(int caller_id);
// SpeechRecognizer::Delegate methods.
virtual void SetRecognitionResult(int caller_id, bool error,
const string16& value);
virtual void DidCompleteRecording(int caller_id);
virtual void DidCompleteRecognition(int caller_id);
virtual void OnRecognizerError(int caller_id,
SpeechRecognizer::ErrorCode error);
virtual void DidCompleteEnvironmentEstimation(int caller_id);
// SpeechInputBubbleController::Delegate methods.
virtual void InfoBubbleButtonClicked(int caller_id,
SpeechInputBubble::Button button);
virtual void InfoBubbleFocusChanged(int caller_id);
private:
struct SpeechInputRequest {
SpeechInputManagerDelegate* delegate;
scoped_refptr<SpeechRecognizer> recognizer;
bool is_active; // Set to true when recording or recognition is going on.
};
// Private constructor to enforce singleton.
friend struct DefaultSingletonTraits<SpeechInputManagerImpl>;
SpeechInputManagerImpl();
virtual ~SpeechInputManagerImpl();
bool HasPendingRequest(int caller_id) const;
SpeechInputManagerDelegate* GetDelegate(int caller_id) const;
void CancelRecognitionAndInformDelegate(int caller_id);
// Starts/restarts recognition for an existing request.
void StartRecognitionForRequest(int caller_id);
SpeechInputManagerDelegate* delegate_;
typedef std::map<int, SpeechInputRequest> SpeechRecognizerMap;
SpeechRecognizerMap requests_;
int recording_caller_id_;
scoped_refptr<SpeechInputBubbleController> bubble_controller_;
};
SpeechInputManager* SpeechInputManager::Get() {
return Singleton<SpeechInputManagerImpl>::get();
}
SpeechInputManagerImpl::SpeechInputManagerImpl()
: recording_caller_id_(0),
bubble_controller_(new SpeechInputBubbleController(
ALLOW_THIS_IN_INITIALIZER_LIST(this))) {
}
SpeechInputManagerImpl::~SpeechInputManagerImpl() {
while (requests_.begin() != requests_.end())
CancelRecognition(requests_.begin()->first);
}
bool SpeechInputManagerImpl::HasPendingRequest(int caller_id) const {
return requests_.find(caller_id) != requests_.end();
}
SpeechInputManagerDelegate* SpeechInputManagerImpl::GetDelegate(
int caller_id) const {
return requests_.find(caller_id)->second.delegate;
}
void SpeechInputManagerImpl::StartRecognition(
SpeechInputManagerDelegate* delegate,
int caller_id,
int render_process_id,
int render_view_id,
const gfx::Rect& element_rect) {
DCHECK(!HasPendingRequest(caller_id));
bubble_controller_->CreateBubble(caller_id, render_process_id, render_view_id,
element_rect);
SpeechInputRequest* request = &requests_[caller_id];
request->delegate = delegate;
request->recognizer = new SpeechRecognizer(this, caller_id);
request->is_active = false;
StartRecognitionForRequest(caller_id);
}
void SpeechInputManagerImpl::StartRecognitionForRequest(int caller_id) {
DCHECK(HasPendingRequest(caller_id));
// If we are currently recording audio for another caller, abort that cleanly.
if (recording_caller_id_)
CancelRecognitionAndInformDelegate(recording_caller_id_);
if (!AudioManager::GetAudioManager()->HasAudioInputDevices()) {
bubble_controller_->SetBubbleMessage(
caller_id, l10n_util::GetStringUTF16(IDS_SPEECH_INPUT_NO_MIC));
} else {
recording_caller_id_ = caller_id;
requests_[caller_id].is_active = true;
requests_[caller_id].recognizer->StartRecording();
}
}
void SpeechInputManagerImpl::CancelRecognition(int caller_id) {
DCHECK(HasPendingRequest(caller_id));
if (requests_[caller_id].is_active)
requests_[caller_id].recognizer->CancelRecognition();
requests_.erase(caller_id);
if (recording_caller_id_ == caller_id)
recording_caller_id_ = 0;
bubble_controller_->CloseBubble(caller_id);
}
void SpeechInputManagerImpl::StopRecording(int caller_id) {
DCHECK(HasPendingRequest(caller_id));
requests_[caller_id].recognizer->StopRecording();
}
void SpeechInputManagerImpl::SetRecognitionResult(int caller_id,
bool error,
const string16& value) {
DCHECK(HasPendingRequest(caller_id));
GetDelegate(caller_id)->SetRecognitionResult(caller_id,
(error ? string16() : value));
}
void SpeechInputManagerImpl::DidCompleteRecording(int caller_id) {
DCHECK(recording_caller_id_ == caller_id);
DCHECK(HasPendingRequest(caller_id));
recording_caller_id_ = 0;
GetDelegate(caller_id)->DidCompleteRecording(caller_id);
bubble_controller_->SetBubbleRecognizingMode(caller_id);
}
void SpeechInputManagerImpl::DidCompleteRecognition(int caller_id) {
GetDelegate(caller_id)->DidCompleteRecognition(caller_id);
requests_.erase(caller_id);
bubble_controller_->CloseBubble(caller_id);
}
void SpeechInputManagerImpl::OnRecognizerError(
int caller_id, SpeechRecognizer::ErrorCode error) {
if (caller_id == recording_caller_id_)
recording_caller_id_ = 0;
requests_[caller_id].is_active = false;
int message_id;
switch (error) {
case SpeechRecognizer::RECOGNIZER_ERROR_CAPTURE:
message_id = IDS_SPEECH_INPUT_ERROR;
break;
case SpeechRecognizer::RECOGNIZER_ERROR_NO_SPEECH:
message_id = IDS_SPEECH_INPUT_NO_SPEECH;
break;
case SpeechRecognizer::RECOGNIZER_ERROR_NO_RESULTS:
message_id = IDS_SPEECH_INPUT_NO_RESULTS;
break;
default:
NOTREACHED() << "unknown error " << error;
return;
}
bubble_controller_->SetBubbleMessage(caller_id,
l10n_util::GetStringUTF16(message_id));
}
void SpeechInputManagerImpl::DidCompleteEnvironmentEstimation(int caller_id) {
DCHECK(HasPendingRequest(caller_id));
DCHECK(recording_caller_id_ == caller_id);
// Speech recognizer has gathered enough background audio so we can ask the
// user to start speaking.
bubble_controller_->SetBubbleRecordingMode(caller_id);
}
void SpeechInputManagerImpl::CancelRecognitionAndInformDelegate(int caller_id) {
SpeechInputManagerDelegate* cur_delegate = GetDelegate(caller_id);
CancelRecognition(caller_id);
cur_delegate->DidCompleteRecording(caller_id);
cur_delegate->DidCompleteRecognition(caller_id);
}
void SpeechInputManagerImpl::InfoBubbleButtonClicked(
int caller_id, SpeechInputBubble::Button button) {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
// Ignore if the caller id was not in our active recognizers list because the
// user might have clicked more than once, or recognition could have been
// cancelled due to other reasons before the user click was processed.
if (!HasPendingRequest(caller_id))
return;
if (button == SpeechInputBubble::BUTTON_CANCEL) {
CancelRecognitionAndInformDelegate(caller_id);
} else if (button == SpeechInputBubble::BUTTON_TRY_AGAIN) {
StartRecognitionForRequest(caller_id);
}
}
void SpeechInputManagerImpl::InfoBubbleFocusChanged(int caller_id) {
DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
// Ignore if the caller id was not in our active recognizers list because the
// user might have clicked more than once, or recognition could have been
// ended due to other reasons before the user click was processed.
if (HasPendingRequest(caller_id)) {
// If this is an ongoing recording or if we were displaying an error message
// to the user, abort it since user has switched focus. Otherwise
// recognition has started and keep that going so user can start speaking to
// another element while this gets the results in parallel.
if (recording_caller_id_ == caller_id || !requests_[caller_id].is_active) {
CancelRecognitionAndInformDelegate(caller_id);
}
}
}
} // namespace speech_input
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