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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 WebKit::WebVector;
using WebKit::WebString;
using WebKit::WebSpeechGrammar;
using WebKit::WebSpeechRecognitionHandle;
using WebKit::WebSpeechRecognitionResult;
using WebKit::WebSpeechRecognitionParams;
using WebKit::WebSpeechRecognizerClient;
namespace content {
SpeechRecognitionDispatcher::SpeechRecognitionDispatcher(
RenderViewImpl* render_view)
: 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) {
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(
SpeechRecognitionGrammar(grammar.src().spec(), grammar.weight()));
}
msg_params.language = UTF16ToUTF8(params.language());
msg_params.max_hypotheses = static_cast<uint32>(params.maxAlternatives());
msg_params.continuous = params.continuous();
msg_params.interim_results = params.interimResults();
msg_params.origin_url = params.origin().toString().utf8();
msg_params.render_view_id = routing_id();
msg_params.request_id = GetOrCreateIDForHandle(handle);
// The handle mapping will be removed in |OnRecognitionEnd|.
Send(new SpeechRecognitionHostMsg_StartRequest(msg_params));
}
void SpeechRecognitionDispatcher::stop(
const WebSpeechRecognitionHandle& handle,
WebSpeechRecognizerClient* recognizer_client) {
// Ignore a |stop| issued without a matching |start|.
if (recognizer_client_ != recognizer_client || !HandleExists(handle))
return;
Send(new SpeechRecognitionHostMsg_StopCaptureRequest(
routing_id(), GetOrCreateIDForHandle(handle)));
}
void SpeechRecognitionDispatcher::abort(
const WebSpeechRecognitionHandle& handle,
WebSpeechRecognizerClient* recognizer_client) {
// Ignore an |abort| issued without a matching |start|.
if (recognizer_client_ != recognizer_client || !HandleExists(handle))
return;
Send(new SpeechRecognitionHostMsg_AbortRequest(
routing_id(), GetOrCreateIDForHandle(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));
}
static WebSpeechRecognizerClient::ErrorCode WebKitErrorCode(
SpeechRecognitionErrorCode e) {
switch (e) {
case SPEECH_RECOGNITION_ERROR_NONE:
NOTREACHED();
return WebSpeechRecognizerClient::OtherError;
case SPEECH_RECOGNITION_ERROR_ABORTED:
return WebSpeechRecognizerClient::AbortedError;
case SPEECH_RECOGNITION_ERROR_AUDIO:
return WebSpeechRecognizerClient::AudioCaptureError;
case SPEECH_RECOGNITION_ERROR_NETWORK:
return WebSpeechRecognizerClient::NetworkError;
case SPEECH_RECOGNITION_ERROR_NOT_ALLOWED:
return WebSpeechRecognizerClient::NotAllowedError;
case SPEECH_RECOGNITION_ERROR_NO_SPEECH:
return WebSpeechRecognizerClient::NoSpeechError;
case SPEECH_RECOGNITION_ERROR_NO_MATCH:
NOTREACHED();
return WebSpeechRecognizerClient::OtherError;
case SPEECH_RECOGNITION_ERROR_BAD_GRAMMAR:
return WebSpeechRecognizerClient::BadGrammarError;
}
NOTREACHED();
return WebSpeechRecognizerClient::OtherError;
}
void SpeechRecognitionDispatcher::OnErrorOccurred(
int request_id, const SpeechRecognitionError& error) {
if (error.code == SPEECH_RECOGNITION_ERROR_NO_MATCH) {
recognizer_client_->didReceiveNoMatch(GetHandleFromID(request_id),
WebSpeechRecognitionResult());
} else {
recognizer_client_->didReceiveError(GetHandleFromID(request_id),
WebString(), // TODO(primiano): message?
WebKitErrorCode(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.is_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::GetOrCreateIDForHandle(
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;
}
bool SpeechRecognitionDispatcher::HandleExists(
const WebSpeechRecognitionHandle& handle) {
for (HandleMap::iterator iter = handle_map_.begin();
iter != handle_map_.end();
++iter) {
if (iter->second.equals(handle))
return true;
}
return false;
}
const WebSpeechRecognitionHandle& SpeechRecognitionDispatcher::GetHandleFromID(
int request_id) {
HandleMap::iterator iter = handle_map_.find(request_id);
DCHECK(iter != handle_map_.end());
return iter->second;
}
} // namespace content
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