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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "SpeechRecognitionModelMapping.h"
#include "SpeechRecognitionModels.h"
#include "mozilla/Preferences.h"
#include "mozilla/intl/Locale.h"
#include "mozilla/intl/LocaleService.h"
#include "nsFmtString.h"
namespace mozilla::dom {
nsCString SpeechModelIdentifier::ToString() const {
return nsFmtCString("{}/{}/{}", mModelName.get(), mFileName.get(),
mRevision.get());
}
Maybe<SpeechModelMatch> SpeechModelFor(const nsACString& aLanguage) {
intl::Locale requested;
if (intl::LocaleParser::TryParse(aLanguage, requested).isErr()) {
return Nothing();
}
// media.webspeech.recognition.model.<language subtag> restricts the choice
// to the model it names.
Span<const char> subtag = requested.Language().Span();
nsAutoCString prefKey("media.webspeech.recognition.model.");
prefKey.Append(subtag.data(), subtag.size());
nsAutoCString prefModelId;
Preferences::GetCString(prefKey.get(), prefModelId);
AutoTArray<nsCString, 1> requestedLocales{nsCString(aLanguage)};
for (const auto& m : kSpeechRecognitionModels) {
if (!m.id) {
break;
}
if (!prefModelId.IsEmpty() && !prefModelId.Equals(m.id)) {
continue;
}
AutoTArray<nsCString, 128> available;
for (const char* const* l = m.supported_locales; *l; ++l) {
available.AppendElement(nsDependentCString(*l));
}
AutoTArray<nsCString, 1> negotiated;
intl::LocaleService::GetInstance()->NegotiateLanguages(
requestedLocales, available, EmptyCString(),
intl::LocaleService::kLangNegStrategyFiltering, negotiated);
if (negotiated.IsEmpty()) {
continue;
}
return Some(SpeechModelMatch{nsCString(m.id), std::move(negotiated[0])});
}
return Nothing();
}
SpeechModelMatch DefaultSpeechModel() {
return {nsCString(kSpeechRecognitionModels[0].id), {}};
}
bool ResolveSpeechModelId(const nsACString& aId, SpeechModelIdentifier& aOut) {
for (const auto& m : kSpeechRecognitionModels) {
if (!m.id) {
break;
}
if (aId.Equals(m.id)) {
aOut = {nsCString(m.repo), nsCString(m.filename), nsCString(m.revision),
m.size_mb};
return true;
}
}
return false;
}
uint32_t SpeechModelSizeMB(const nsACString& aModel,
const nsACString& aRevision,
const nsACString& aFilename) {
for (const auto& m : kSpeechRecognitionModels) {
if (!m.id) {
break;
}
if (aModel.Equals(m.repo) && aRevision.Equals(m.revision) &&
aFilename.Equals(m.filename)) {
return m.size_mb;
}
}
return 0;
}
} // namespace mozilla::dom