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// Copyright (c) 2012 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 "content/renderer/speech_recognition_dispatcher.h"
#include "base/basictypes.h"
#include "base/utf_string_conversions.h"
#include "content/common/speech_recognition_messages.h"
#include "content/renderer/render_view_impl.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSpeechGrammar.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSpeechRecognitionParams.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSpeechRecognitionResult.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebSpeechRecognizerClient.h"
using content::SpeechRecognitionError;
using content::SpeechRecognitionResult;
using WebKit::WebVector;
using WebKit::WebString;
using WebKit::WebSpeechGrammar;
using WebKit::WebSpeechRecognitionHandle;
using WebKit::WebSpeechRecognitionResult;
using WebKit::WebSpeechRecognitionParams;
using WebKit::WebSpeechRecognizerClient;
SpeechRecognitionDispatcher::SpeechRecognitionDispatcher(
RenderViewImpl* render_view)
: content::RenderViewObserver(render_view),
recognizer_client_(NULL),
next_id_(1) {
}
SpeechRecognitionDispatcher::~SpeechRecognitionDispatcher() {
}
bool SpeechRecognitionDispatcher::OnMessageReceived(
const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(SpeechRecognitionDispatcher, message)
IPC_MESSAGE_HANDLER(SpeechRecognitionMsg_Started, OnRecognitionStarted)
IPC_MESSAGE_HANDLER(SpeechRecognitionMsg_AudioStarted, OnAudioStarted)
IPC_MESSAGE_HANDLER(SpeechRecognitionMsg_SoundStarted, OnSoundStarted)
IPC_MESSAGE_HANDLER(SpeechRecognitionMsg_SoundEnded, OnSoundEnded)
IPC_MESSAGE_HANDLER(SpeechRecognitionMsg_AudioEnded, OnAudioEnded)
IPC_MESSAGE_HANDLER(SpeechRecognitionMsg_ErrorOccurred, OnErrorOccurred)
IPC_MESSAGE_HANDLER(SpeechRecognitionMsg_Ended, OnRecognitionEnded)
IPC_MESSAGE_HANDLER(SpeechRecognitionMsg_ResultRetrieved, OnResultRetrieved)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void SpeechRecognitionDispatcher::start(
const WebSpeechRecognitionHandle& handle,
const WebSpeechRecognitionParams& params,
WebSpeechRecognizerClient* recognizer_client) {
//TODO(primiano) What to do if a start is issued to an already started object?
DCHECK(!recognizer_client_ || recognizer_client_ == recognizer_client);
recognizer_client_ = recognizer_client;
SpeechRecognitionHostMsg_StartRequest_Params msg_params;
for (size_t i = 0; i < params.grammars().size(); ++i) {
const WebSpeechGrammar& grammar = params.grammars()[i];
msg_params.grammars.push_back(
content::SpeechRecognitionGrammar(grammar.src().spec(),
grammar.weight()));
}
msg_params.language = UTF16ToUTF8(params.language());
msg_params.is_one_shot = !params.continuous();
msg_params.origin_url = ""; // TODO(primiano) we need an origin from WebKit.
msg_params.render_view_id = routing_id();
msg_params.request_id = GetIDForHandle(handle);
Send(new SpeechRecognitionHostMsg_StartRequest(msg_params));
}
void SpeechRecognitionDispatcher::stop(
const WebSpeechRecognitionHandle& handle,
WebSpeechRecognizerClient* recognizer_client) {
DCHECK(recognizer_client_ == recognizer_client);
Send(new SpeechRecognitionHostMsg_StopCaptureRequest(routing_id(),
GetIDForHandle(handle)));
}
void SpeechRecognitionDispatcher::abort(
const WebSpeechRecognitionHandle& handle,
WebSpeechRecognizerClient* recognizer_client) {
Send(new SpeechRecognitionHostMsg_AbortRequest(routing_id(),
GetIDForHandle(handle)));
}
void SpeechRecognitionDispatcher::OnRecognitionStarted(int request_id) {
recognizer_client_->didStart(GetHandleFromID(request_id));
}
void SpeechRecognitionDispatcher::OnAudioStarted(int request_id) {
recognizer_client_->didStartAudio(GetHandleFromID(request_id));
}
void SpeechRecognitionDispatcher::OnSoundStarted(int request_id) {
recognizer_client_->didStartSound(GetHandleFromID(request_id));
}
void SpeechRecognitionDispatcher::OnSoundEnded(int request_id) {
recognizer_client_->didEndSound(GetHandleFromID(request_id));
}
void SpeechRecognitionDispatcher::OnAudioEnded(int request_id) {
recognizer_client_->didEndAudio(GetHandleFromID(request_id));
}
void SpeechRecognitionDispatcher::OnErrorOccurred(
int request_id, const SpeechRecognitionError& error) {
if (error.code == content::SPEECH_RECOGNITION_ERROR_NO_MATCH) {
recognizer_client_->didReceiveNoMatch(GetHandleFromID(request_id),
WebSpeechRecognitionResult());
} else {
// TODO(primiano) speech_recognition_error.h must be updated with the new
// API specs soon.
WebSpeechRecognizerClient::ErrorCode wk_error_code;
switch (error.code) {
case content::SPEECH_RECOGNITION_ERROR_ABORTED:
wk_error_code = WebSpeechRecognizerClient::AbortedError;
break;
case content::SPEECH_RECOGNITION_ERROR_AUDIO:
wk_error_code = WebSpeechRecognizerClient::AudioCaptureError;
break;
case content::SPEECH_RECOGNITION_ERROR_NETWORK:
wk_error_code = WebSpeechRecognizerClient::NetworkError;
break;
case content::SPEECH_RECOGNITION_ERROR_NO_SPEECH:
wk_error_code = WebSpeechRecognizerClient::NoSpeechError;
break;
case content::SPEECH_RECOGNITION_ERROR_BAD_GRAMMAR:
wk_error_code = WebSpeechRecognizerClient::BadGrammarError;
break;
default:
NOTREACHED();
wk_error_code = WebSpeechRecognizerClient::OtherError;
}
recognizer_client_->didReceiveError(GetHandleFromID(request_id),
WebString(), // TODO(primiano) message?
wk_error_code);
}
}
void SpeechRecognitionDispatcher::OnRecognitionEnded(int request_id) {
recognizer_client_->didEnd(GetHandleFromID(request_id));
handle_map_.erase(request_id);
}
void SpeechRecognitionDispatcher::OnResultRetrieved(
int request_id, const SpeechRecognitionResult& result) {
const size_t num_hypotheses = result.hypotheses.size();
WebSpeechRecognitionResult webkit_result;
WebVector<WebString> transcripts(num_hypotheses);
WebVector<float> confidences(num_hypotheses);
for (size_t i = 0; i < num_hypotheses; ++i) {
transcripts[i] = result.hypotheses[i].utterance;
confidences[i] = static_cast<float>(result.hypotheses[i].confidence);
}
webkit_result.assign(transcripts, confidences, !result.provisional);
// TODO(primiano) Handle history, currently empty.
WebVector<WebSpeechRecognitionResult> empty_history;
recognizer_client_->didReceiveResult(GetHandleFromID(request_id),
webkit_result,
0, // result_index
empty_history);
}
int SpeechRecognitionDispatcher::GetIDForHandle(
const WebSpeechRecognitionHandle& handle) {
// Search first for an existing mapping.
for (HandleMap::iterator iter = handle_map_.begin();
iter != handle_map_.end();
++iter) {
if (iter->second.equals(handle))
return iter->first;
}
// If no existing mapping found, create a new one.
const int new_id = next_id_;
handle_map_[new_id] = handle;
++next_id_;
return new_id;
}
const WebSpeechRecognitionHandle& SpeechRecognitionDispatcher::GetHandleFromID(
int request_id) {
HandleMap::iterator iter = handle_map_.find(request_id);
DCHECK(iter != handle_map_.end());
return iter->second;
}
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