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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 "base/ref_counted.h"
#include <map>
namespace speech_input {
class SpeechInputManagerImpl : public SpeechInputManager,
public SpeechRecognizerDelegate {
public:
explicit SpeechInputManagerImpl(SpeechInputManagerDelegate* delegate);
virtual ~SpeechInputManagerImpl();
// SpeechInputManager methods.
void StartRecognition(const SpeechInputCallerId& caller_id);
void CancelRecognition(const SpeechInputCallerId& caller_id);
void StopRecording(const SpeechInputCallerId& caller_id);
// SpeechRecognizer::Delegate methods.
void SetRecognitionResult(const SpeechInputCallerId& caller_id, bool error,
const string16& value);
void DidCompleteRecording(const SpeechInputCallerId& caller_id);
void DidCompleteRecognition(const SpeechInputCallerId& caller_id);
private:
SpeechInputManagerDelegate* delegate_;
typedef std::map<SpeechInputCallerId,
scoped_refptr<SpeechRecognizer> > SpeechRecognizerMap;
SpeechRecognizerMap recognizers_;
SpeechInputCallerId recording_caller_id_;
};
SpeechInputManager* SpeechInputManager::Create(
SpeechInputManagerDelegate* delegate) {
return new SpeechInputManagerImpl(delegate);
}
SpeechInputManagerImpl::SpeechInputManagerImpl(
SpeechInputManagerDelegate* delegate)
: delegate_(delegate),
recording_caller_id_(0, 0) {
}
SpeechInputManagerImpl::~SpeechInputManagerImpl() {
while (recognizers_.begin() != recognizers_.end())
CancelRecognition(recognizers_.begin()->first);
}
void SpeechInputManagerImpl::StartRecognition(
const SpeechInputCallerId& caller_id) {
// Make sure we are not already doing recognition for this render view.
DCHECK(recognizers_.find(caller_id) == recognizers_.end());
if (recognizers_.find(caller_id) != recognizers_.end())
return;
// If we are currently recording audio for another caller, abort that cleanly.
if (recording_caller_id_.first != 0) {
SpeechInputCallerId active_caller = recording_caller_id_;
CancelRecognition(active_caller);
DidCompleteRecording(active_caller);
DidCompleteRecognition(active_caller);
}
recording_caller_id_ = caller_id;
recognizers_[caller_id] = new SpeechRecognizer(this, caller_id);
recognizers_[caller_id]->StartRecording();
}
void SpeechInputManagerImpl::CancelRecognition(
const SpeechInputCallerId& caller_id) {
DCHECK(recognizers_.find(caller_id) != recognizers_.end());
if (recognizers_.find(caller_id) != recognizers_.end()) {
recognizers_[caller_id]->CancelRecognition();
recognizers_.erase(caller_id);
}
}
void SpeechInputManagerImpl::StopRecording(
const SpeechInputCallerId& caller_id) {
DCHECK(recognizers_.find(caller_id) != recognizers_.end());
if (recognizers_.find(caller_id) != recognizers_.end()) {
recognizers_[caller_id]->StopRecording();
}
}
void SpeechInputManagerImpl::SetRecognitionResult(
const SpeechInputCallerId& caller_id, bool error, const string16& value) {
delegate_->SetRecognitionResult(caller_id, (error ? string16() : value));
}
void SpeechInputManagerImpl::DidCompleteRecording(
const SpeechInputCallerId& caller_id) {
DCHECK(recording_caller_id_ == caller_id);
recording_caller_id_.first = 0;
delegate_->DidCompleteRecording(caller_id);
}
void SpeechInputManagerImpl::DidCompleteRecognition(
const SpeechInputCallerId& caller_id) {
recognizers_.erase(caller_id);
delegate_->DidCompleteRecognition(caller_id);
}
} // namespace speech_input
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