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content / browser / speech / soda_speech_recognition_engine_impl.cc [blame]
// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/speech/soda_speech_recognition_engine_impl.h"
#include <string.h>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "content/browser/speech/speech_recognition_engine.h"
#include "content/browser/speech/speech_recognition_manager_impl.h"
#include "content/public/browser/speech_recognition_manager_delegate.h"
#include "content/public/browser/speech_recognition_session_config.h"
#include "media/mojo/mojom/audio_data.mojom.h"
#include "media/mojo/mojom/media_types.mojom.h"
#include "media/mojo/mojom/speech_recognition.mojom.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
namespace content {
namespace {
// Duration of each audio packet.
constexpr int kAudioPacketIntervalMs = 100;
constexpr float kSpeechRecognitionConfidence = 1.0f;
// Substitute the real instances in browser and unit tests.
SpeechRecognitionManagerDelegate* speech_recognition_mgr_delegate_for_tests =
nullptr;
} // namespace
SodaSpeechRecognitionEngineImpl::SodaSpeechRecognitionEngineImpl(
const SpeechRecognitionSessionConfig& config)
: config_(config) {
send_audio_callback_ = base::BindPostTaskToCurrentDefault(base::BindRepeating(
&SodaSpeechRecognitionEngineImpl::SendAudioToSpeechRecognitionService,
weak_factory_.GetWeakPtr()));
mark_done_callback_ = base::BindPostTaskToCurrentDefault(base::BindRepeating(
&SodaSpeechRecognitionEngineImpl::MarkDone, weak_factory_.GetWeakPtr()));
}
SodaSpeechRecognitionEngineImpl::~SodaSpeechRecognitionEngineImpl() = default;
bool SodaSpeechRecognitionEngineImpl::Initialize() {
if (speech_recognition_context_.is_bound()) {
return true;
}
raw_ptr<SpeechRecognitionManagerDelegate> speech_recognition_mgr_delegate;
if (!speech_recognition_mgr_delegate_for_tests) {
speech_recognition_mgr_delegate =
SpeechRecognitionManagerImpl::GetInstance()
? SpeechRecognitionManagerImpl::GetInstance()->delegate()
: nullptr;
} else {
speech_recognition_mgr_delegate = speech_recognition_mgr_delegate_for_tests;
}
if (!speech_recognition_mgr_delegate) {
return false;
}
// Create a SpeechRecognitionContext and bind it to the current
// SodaSpeechRecognitionEngineImpl. The SpeechRecognitionContext passes the
// SpeechRecognitionRecognizer receiver and moves the
// SpeechRecognitionRecognizerClient. The receiver is in the utility process
// on Linux/Mac/Windows and in the Ash process on ChromeOS.
mojo::PendingReceiver<media::mojom::SpeechRecognitionContext>
speech_recognition_context_receiver =
speech_recognition_context_.BindNewPipeAndPassReceiver();
media::mojom::SpeechRecognitionOptionsPtr options =
media::mojom::SpeechRecognitionOptions::New();
options->recognition_mode = media::mojom::SpeechRecognitionMode::kCaption;
options->enable_formatting = false;
options->recognizer_client_type =
media::mojom::RecognizerClientType::kLiveCaption;
options->skip_continuously_empty_audio = true;
speech_recognition_context_->BindRecognizer(
speech_recognition_recognizer_.BindNewPipeAndPassReceiver(),
speech_recognition_recognizer_client_.BindNewPipeAndPassRemote(),
std::move(options),
base::BindPostTaskToCurrentDefault(
base::BindOnce(&SodaSpeechRecognitionEngineImpl::OnRecognizerBound,
weak_factory_.GetWeakPtr())));
speech_recognition_mgr_delegate->BindSpeechRecognitionContext(
std::move(speech_recognition_context_receiver));
speech_recognition_context_.set_disconnect_handler(
base::BindPostTaskToCurrentDefault(base::BindOnce(
&SodaSpeechRecognitionEngineImpl::OnRecognizerDisconnected,
weak_factory_.GetWeakPtr())));
return true;
}
void SodaSpeechRecognitionEngineImpl::StartRecognition() {
DCHECK_CALLED_ON_VALID_SEQUENCE(main_sequence_checker_);
is_start_recognition_ = true;
}
void SodaSpeechRecognitionEngineImpl::EndRecognition() {
DCHECK_CALLED_ON_VALID_SEQUENCE(main_sequence_checker_);
is_start_recognition_ = false;
}
void SodaSpeechRecognitionEngineImpl::TakeAudioChunk(const AudioChunk& data) {
DCHECK_CALLED_ON_VALID_SEQUENCE(main_sequence_checker_);
if (!is_start_recognition_) {
Abort(media::mojom::SpeechRecognitionErrorCode::kNotAllowed);
return;
}
send_audio_callback_.Run(ConvertToAudioDataS16(data));
}
void SodaSpeechRecognitionEngineImpl::AudioChunksEnded() {
DCHECK_CALLED_ON_VALID_SEQUENCE(main_sequence_checker_);
mark_done_callback_.Run();
}
int SodaSpeechRecognitionEngineImpl::GetDesiredAudioChunkDurationMs() const {
return kAudioPacketIntervalMs;
}
// media::mojom::SpeechRecognitionRecognizerClient:
void SodaSpeechRecognitionEngineImpl::OnSpeechRecognitionRecognitionEvent(
const media::SpeechRecognitionResult& recognition_result,
OnSpeechRecognitionRecognitionEventCallback reply) {
DCHECK_CALLED_ON_VALID_SEQUENCE(main_sequence_checker_);
// Returning recognition state.
std::move(reply).Run(is_start_recognition_);
// Map recognition results.
std::vector<media::mojom::WebSpeechRecognitionResultPtr> results;
results.push_back(media::mojom::WebSpeechRecognitionResult::New());
media::mojom::WebSpeechRecognitionResultPtr& result = results.back();
result->is_provisional = !recognition_result.is_final;
media::mojom::SpeechRecognitionHypothesisPtr hypothesis =
media::mojom::SpeechRecognitionHypothesis::New();
// TODO(crbug.com/40286514): Hardcode now.
hypothesis->confidence = kSpeechRecognitionConfidence;
hypothesis->utterance = base::UTF8ToUTF16(recognition_result.transcription);
result->hypotheses.push_back(std::move(hypothesis));
if (!config_.continuous && !result->is_provisional) {
delegate_->OnSpeechRecognitionEngineEndOfUtterance();
}
delegate_->OnSpeechRecognitionEngineResults(results);
}
void SodaSpeechRecognitionEngineImpl::OnSpeechRecognitionError() {
Abort(media::mojom::SpeechRecognitionErrorCode::kNoSpeech);
}
void SodaSpeechRecognitionEngineImpl::OnLanguageIdentificationEvent(
media::mojom::LanguageIdentificationEventPtr event) {}
void SodaSpeechRecognitionEngineImpl::OnSpeechRecognitionStopped() {
Abort(media::mojom::SpeechRecognitionErrorCode::kAborted);
}
void SodaSpeechRecognitionEngineImpl::
SetSpeechRecognitionManagerDelegateForTesting(
SpeechRecognitionManagerDelegate* delegate) {
speech_recognition_mgr_delegate_for_tests = delegate;
}
void SodaSpeechRecognitionEngineImpl::SetOnReadyCallback(
base::OnceCallback<void()> callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(main_sequence_checker_);
on_ready_callback_ = std::move(callback);
if (on_ready_callback_) {
std::move(on_ready_callback_).Run();
}
}
void SodaSpeechRecognitionEngineImpl::OnRecognizerBound(
bool is_multichannel_supported) {
DCHECK_CALLED_ON_VALID_SEQUENCE(main_sequence_checker_);
if (on_ready_callback_) {
std::move(on_ready_callback_).Run();
}
}
void SodaSpeechRecognitionEngineImpl::OnRecognizerDisconnected() {
DCHECK_CALLED_ON_VALID_SEQUENCE(main_sequence_checker_);
Abort(media::mojom::SpeechRecognitionErrorCode::kAborted);
}
void SodaSpeechRecognitionEngineImpl::SendAudioToSpeechRecognitionService(
media::mojom::AudioDataS16Ptr audio_data) {
DCHECK(audio_data);
if (speech_recognition_recognizer_.is_bound()) {
speech_recognition_recognizer_->SendAudioToSpeechRecognitionService(
std::move(audio_data));
}
}
void SodaSpeechRecognitionEngineImpl::MarkDone() {
if (speech_recognition_recognizer_.is_bound()) {
speech_recognition_recognizer_->MarkDone();
}
}
void SodaSpeechRecognitionEngineImpl::Abort(
media::mojom::SpeechRecognitionErrorCode error_code) {
DVLOG(1) << "Aborting with error " << error_code;
if (error_code != media::mojom::SpeechRecognitionErrorCode::kNone) {
delegate_->OnSpeechRecognitionEngineError(
media::mojom::SpeechRecognitionError(
error_code, media::mojom::SpeechAudioErrorDetails::kNone));
}
}
media::mojom::AudioDataS16Ptr
SodaSpeechRecognitionEngineImpl::ConvertToAudioDataS16(
const AudioChunk& audio_data) {
// Only support mono and 2 bytes depth audio format.
CHECK_EQ(audio_parameters_.channels(), 1);
CHECK_EQ(audio_data.bytes_per_sample(), 2);
auto signed_buffer = media::mojom::AudioDataS16::New();
signed_buffer->channel_count = audio_parameters_.channels();
signed_buffer->sample_rate = audio_parameters_.sample_rate();
signed_buffer->frame_count = audio_data.NumSamples();
signed_buffer->data.resize(audio_data.NumSamples() *
audio_parameters_.channels());
size_t audio_byte_size =
audio_data.NumSamples() * audio_data.bytes_per_sample();
memcpy(&signed_buffer->data[0], audio_data.SamplesData16(), audio_byte_size);
return signed_buffer;
}
} // namespace content