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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/speech/chrome_speech_recognition_service.h"
#include <string>
#include <unordered_set>
#include "base/containers/contains.h"
#include "base/containers/flat_map.h"
#include "base/metrics/histogram_functions.h"
#include "base/scoped_observation.h"
#include "build/build_config.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/component_updater/soda_language_pack_component_installer.h"
#include "chrome/grit/generated_resources.h"
#include "components/live_caption/pref_names.h"
#include "components/prefs/pref_service.h"
#include "components/soda/constants.h"
#include "components/soda/soda_installer.h"
#include "components/user_prefs/user_prefs.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/service_process_host.h"
#include "media/base/media_switches.h"
#include "media/mojo/mojom/speech_recognition_service.mojom.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#if BUILDFLAG(IS_CHROMEOS)
#include "ash/constants/ash_features.h"
#endif // BUILDFLAG(IS_CHROMEOS)
namespace speech {
constexpr base::TimeDelta kIdleProcessTimeout = base::Seconds(5);
ChromeSpeechRecognitionService::ChromeSpeechRecognitionService(
content::BrowserContext* context)
: context_(context) {
#if BUILDFLAG(IS_CHROMEOS)
if (!base::FeatureList::IsEnabled(
ash::features::kOnDeviceSpeechRecognition)) {
return;
}
#endif // BUILDFLAG(IS_CHROMEOS)
auto* soda_installer = speech::SodaInstaller::GetInstance();
// The SodaInstaller might not exist in unit tests.
if (soda_installer) {
soda_installer_observer_.Observe(soda_installer);
}
}
ChromeSpeechRecognitionService::~ChromeSpeechRecognitionService() = default;
void ChromeSpeechRecognitionService::BindSpeechRecognitionContext(
mojo::PendingReceiver<media::mojom::SpeechRecognitionContext> receiver) {
LaunchIfNotRunning();
if (speech_recognition_service_.is_bound()) {
speech_recognition_service_->BindSpeechRecognitionContext(
std::move(receiver));
}
}
void ChromeSpeechRecognitionService::BindAudioSourceSpeechRecognitionContext(
mojo::PendingReceiver<media::mojom::AudioSourceSpeechRecognitionContext>
receiver) {
LaunchIfNotRunning();
if (speech_recognition_service_.is_bound()) {
speech_recognition_service_->BindAudioSourceSpeechRecognitionContext(
std::move(receiver));
}
}
void ChromeSpeechRecognitionService::OnSodaInstalled(
speech::LanguageCode language_code) {
if (speech_recognition_service_.is_bound()) {
speech_recognition_service_->SetSodaConfigPaths(
ChromeSpeechRecognitionService::GetSodaConfigPaths());
}
}
void ChromeSpeechRecognitionService::OnSodaInstallError(
speech::LanguageCode language_code,
speech::SodaInstaller::ErrorCode error_code) {}
void ChromeSpeechRecognitionService::OnSodaProgress(
speech::LanguageCode language_code,
int progress) {}
void ChromeSpeechRecognitionService::LaunchIfNotRunning() {
if (speech_recognition_service_.is_bound()) {
return;
}
PrefService* profile_prefs = user_prefs::UserPrefs::Get(context_);
PrefService* global_prefs = g_browser_process->local_state();
DCHECK(profile_prefs);
DCHECK(global_prefs);
// TODO(crbug.com/40162502): Language pack path should be configurable per
// SpeechRecognitionRecognizer to allow multiple features to use Speech
// recognition. For now, only Live Caption uses SpeechRecognitionService on
// non-Chrome OS Chrome, so hard-coding to the Live Caption language code.
const std::string language_name =
prefs::GetLiveCaptionLanguageCode(profile_prefs);
std::optional<speech::SodaLanguagePackComponentConfig> language_config =
speech::GetLanguageComponentConfig(language_name);
CHECK(language_config);
base::UmaHistogramEnumeration("Accessibility.LiveCaption.SodaLanguage",
language_config.value().language_code);
base::FilePath binary_path;
binary_path = global_prefs->GetFilePath(prefs::kSodaBinaryPath);
base::flat_map<std::string, base::FilePath> config_paths =
ChromeSpeechRecognitionService::GetSodaConfigPaths();
if (binary_path.empty() || config_paths[language_name].empty()) {
LOG(ERROR) << "Unable to find SODA files on the device.";
return;
}
content::ServiceProcessHost::Launch(
speech_recognition_service_.BindNewPipeAndPassReceiver(),
content::ServiceProcessHost::Options()
.WithDisplayName(IDS_UTILITY_PROCESS_SPEECH_RECOGNITION_SERVICE_NAME)
.Pass());
// Ensure that if the interface is ever disconnected (e.g. the service
// process crashes) or goes idle for a short period of time -- meaning there
// are no in-flight messages and no other interfaces bound through this
// one -- then we will reset |remote|, causing the service process to be
// terminated if it isn't already.
speech_recognition_service_.reset_on_disconnect();
speech_recognition_service_.reset_on_idle_timeout(kIdleProcessTimeout);
speech_recognition_service_->SetSodaPaths(binary_path, config_paths,
language_name);
bool mask_offensive_words =
profile_prefs->GetBoolean(prefs::kLiveCaptionMaskOffensiveWords);
speech_recognition_service_->SetSodaParams(mask_offensive_words);
}
base::flat_map<std::string, base::FilePath>
ChromeSpeechRecognitionService::GetSodaConfigPaths() {
base::flat_map<std::string, base::FilePath> config_file_paths;
std::unordered_set<std::string> registered_language_packs;
for (const auto& language : g_browser_process->local_state()->GetList(
prefs::kSodaRegisteredLanguagePacks)) {
registered_language_packs.insert(language.GetString());
}
for (const SodaLanguagePackComponentConfig& config :
kLanguageComponentConfigs) {
base::FilePath config_path =
g_browser_process->local_state()->GetFilePath(config.config_path_pref);
if (!config_path.empty() &&
base::Contains(registered_language_packs, config.language_name)) {
config_file_paths[config.language_name] = config_path;
}
}
return config_file_paths;
}
} // namespace speech
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