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// Copyright 2016 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/media/session/audio_focus_delegate_android.h"
#include "base/android/jni_android.h"
#include "base/unguessable_token.h"
#include "content/browser/media/session/media_session_impl.h"
#include "media/base/media_switches.h"
#include "services/media_session/public/mojom/audio_focus.mojom.h"
// Must come after all headers that specialize FromJniType() / ToJniType().
#include "content/public/android/content_jni_headers/AudioFocusDelegate_jni.h"
using base::android::JavaParamRef;
namespace content {
AudioFocusDelegateAndroid::AudioFocusDelegateAndroid(
MediaSessionImpl* media_session)
: media_session_(media_session) {
if (base::FeatureList::IsEnabled(media::kDeferAudioFocusUntilAudible)) {
Observe(media_session_->web_contents());
}
}
AudioFocusDelegateAndroid::~AudioFocusDelegateAndroid() {
JNIEnv* env = base::android::AttachCurrentThread();
DCHECK(env);
Java_AudioFocusDelegate_tearDown(env, j_media_session_delegate_);
}
void AudioFocusDelegateAndroid::Initialize() {
JNIEnv* env = base::android::AttachCurrentThread();
DCHECK(env);
j_media_session_delegate_.Reset(
Java_AudioFocusDelegate_create(env, reinterpret_cast<intptr_t>(this)));
}
AudioFocusDelegate::AudioFocusResult
AudioFocusDelegateAndroid::RequestAudioFocus(
media_session::mojom::AudioFocusType audio_focus_type) {
if (!base::FeatureList::IsEnabled(media::kRequestSystemAudioFocus)) {
return AudioFocusDelegate::AudioFocusResult::kSuccess;
}
if (base::FeatureList::IsEnabled(media::kDeferAudioFocusUntilAudible) &&
audio_focus_type == media_session::mojom::AudioFocusType::kGain &&
!media_session_->web_contents()->IsCurrentlyAudible()) {
is_deferred_gain_pending_ = true;
return AudioFocusDelegate::AudioFocusResult::kDelayed;
}
// Any previously deferred gain request is no longer pending.
is_deferred_gain_pending_ = false;
JNIEnv* env = base::android::AttachCurrentThread();
DCHECK(env);
bool success = Java_AudioFocusDelegate_requestAudioFocus(
env, j_media_session_delegate_,
audio_focus_type ==
media_session::mojom::AudioFocusType::kGainTransientMayDuck);
return success ? AudioFocusDelegate::AudioFocusResult::kSuccess
: AudioFocusDelegate::AudioFocusResult::kFailed;
}
void AudioFocusDelegateAndroid::AbandonAudioFocus() {
JNIEnv* env = base::android::AttachCurrentThread();
DCHECK(env);
is_deferred_gain_pending_ = false;
Java_AudioFocusDelegate_abandonAudioFocus(env, j_media_session_delegate_);
}
std::optional<media_session::mojom::AudioFocusType>
AudioFocusDelegateAndroid::GetCurrentFocusType() const {
JNIEnv* env = base::android::AttachCurrentThread();
DCHECK(env);
return Java_AudioFocusDelegate_isFocusTransient(env,
j_media_session_delegate_)
? media_session::mojom::AudioFocusType::kGainTransientMayDuck
: media_session::mojom::AudioFocusType::kGain;
}
const base::UnguessableToken& AudioFocusDelegateAndroid::request_id() const {
return base::UnguessableToken::Null();
}
void AudioFocusDelegateAndroid::OnSuspend(JNIEnv*,
const JavaParamRef<jobject>&) {
if (!media_session_->IsActive()) {
return;
}
media_session_->Suspend(MediaSession::SuspendType::kSystem);
}
void AudioFocusDelegateAndroid::OnResume(JNIEnv*,
const JavaParamRef<jobject>&) {
if (!media_session_->IsSuspended()) {
return;
}
media_session_->Resume(MediaSession::SuspendType::kSystem);
}
void AudioFocusDelegateAndroid::OnStartDucking(JNIEnv*, jobject) {
media_session_->StartDucking();
}
void AudioFocusDelegateAndroid::OnStopDucking(JNIEnv*, jobject) {
media_session_->StopDucking();
}
void AudioFocusDelegateAndroid::OnAudioStateChanged(bool is_audible) {
if (!is_deferred_gain_pending_ || !is_audible) {
return;
}
constexpr auto type = media_session::mojom::AudioFocusType::kGain;
auto result = RequestAudioFocus(type);
media_session_->FinishSystemAudioFocusRequest(
type, result != AudioFocusResult::kFailed);
}
// static
std::unique_ptr<AudioFocusDelegate> AudioFocusDelegate::Create(
MediaSessionImpl* media_session) {
AudioFocusDelegateAndroid* delegate =
new AudioFocusDelegateAndroid(media_session);
delegate->Initialize();
return std::unique_ptr<AudioFocusDelegate>(delegate);
}
} // namespace content
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