Plumb preamble log data from the hotword extension into the speech recognizer.

chrome/browser/extensions/api/hotword_private/hotword_private_api.cc

 // Copyright 2014 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/extensions/api/hotword_private/hotword_private_api.h"
 
 #include <string>
 
 #include "base/i18n/rtl.h"
 #include "base/lazy_instance.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/hotword_audio_history_handler.h"
 #include "chrome/browser/search/hotword_client.h"
 #include "chrome/browser/search/hotword_service.h"
 #include "chrome/browser/search/hotword_service_factory.h"
 #include "chrome/browser/ui/app_list/app_list_service.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/grit/generated_resources.h"
+#include "content/public/browser/speech_recognition_session_preamble.h"
 #include "extensions/browser/event_router.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace extensions {
 
 namespace hotword_private_constants {
 const char kHotwordServiceUnavailable[] = "Hotword Service is unavailable.";
 const char kHotwordEventServiceUnavailable[] =
     "Hotword Private Event Service is unavailable.";
 }  // hotword_private_constants
@@ skipping 144 matching lines @@
   HotwordService* hotword_service =
       HotwordServiceFactory::GetForProfile(GetProfile());
   if (hotword_service &&
       hotword_service->client() &&
       !hotword_service->IsTraining())
     hotword_service->client()->OnHotwordStateChanged(params->started);
   return true;
 }
 
 bool HotwordPrivateNotifyHotwordRecognitionFunction::RunSync() {
+  scoped_ptr<api::hotword_private::NotifyHotwordRecognition::Params> params(
+      api::hotword_private::NotifyHotwordRecognition::Params::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params.get());
+
+  scoped_refptr<content::SpeechRecognitionSessionPreamble> preamble;
+  if (params->log.get() &&
+      !params->log->buffer.empty() &&
+      params->log->channels == 1) {
+    // TODO(amistry): Convert multi-channel preamble log into mono.
+    preamble = new content::SpeechRecognitionSessionPreamble();
+    preamble->sample_rate = params->log->sample_rate;
+    preamble->sample_depth = params->log->bytes_per_sample;
+    preamble->sample_data.swap(params->log->buffer);
+  }
+
   HotwordService* hotword_service =
       HotwordServiceFactory::GetForProfile(GetProfile());
   if (hotword_service) {
     if (hotword_service->IsTraining()) {
       hotword_service->NotifyHotwordTriggered();
     } else if (hotword_service->client()) {
-      hotword_service->client()->OnHotwordRecognized();
+      hotword_service->client()->OnHotwordRecognized(preamble);
     } else if (HotwordService::IsExperimentalHotwordingEnabled() &&
                hotword_service->IsAlwaysOnEnabled()) {
       Browser* browser = GetCurrentBrowser();
       // If a Browser does not exist, fall back to the universally available,
       // but not recommended, way.
       AppListService* app_list_service = AppListService::Get(
           browser ? browser->host_desktop_type() : chrome::GetActiveDesktop());
       CHECK(app_list_service);
-      app_list_service->ShowForVoiceSearch(GetProfile());
+      app_list_service->ShowForVoiceSearch(GetProfile(), preamble);
     }
   }
   return true;
 }
 
 bool HotwordPrivateGetLaunchStateFunction::RunSync() {
   HotwordService* hotword_service =
       HotwordServiceFactory::GetForProfile(GetProfile());
   if (!hotword_service) {
     error_ = hotword_private_constants::kHotwordServiceUnavailable;
@@ skipping 209 matching lines @@
 void HotwordPrivateGetAudioHistoryEnabledFunction::SetResultAndSendResponse(
     bool success, bool new_enabled_value) {
   api::hotword_private::AudioHistoryState result;
   result.success = success;
   result.enabled = new_enabled_value;
   SetResult(result.ToValue().release());
   SendResponse(true);
 }
 
 }  // namespace extensions