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diff --git a/emulator/audio/halservice/AudioControl.cpp b/emulator/audio/halservice/AudioControl.cpp
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+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "AudioControl"
+// #define LOG_NDEBUG 0
+
+#include "AudioControl.h"
+#include "audio_hw_control.h"
+
+#include <aidl/android/hardware/automotive/audiocontrol/AudioFocusChange.h>
+#include <aidl/android/hardware/automotive/audiocontrol/DuckingInfo.h>
+#include <aidl/android/hardware/automotive/audiocontrol/IFocusListener.h>
+
+#include <android-base/logging.h>
+#include <android-base/parseint.h>
+#include <android-base/strings.h>
+
+#include <android_audio_policy_configuration_V7_0-enums.h>
+#include <private/android_filesystem_config.h>
+
+#include <stdio.h>
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace audiocontrol {
+
+using ::android::base::EqualsIgnoreCase;
+using ::android::base::ParseInt;
+using ::std::shared_ptr;
+using ::std::string;
+
+namespace xsd {
+using namespace ::android::audio::policy::configuration::V7_0;
+}
+
+namespace {
+const float kLowerBound = -1.0f;
+const float kUpperBound = 1.0f;
+bool checkCallerHasWritePermissions(int fd) {
+ // Double check that's only called by root - it should be be blocked at debug() level,
+ // but it doesn't hurt to make sure...
+ if (AIBinder_getCallingUid() != AID_ROOT) {
+ dprintf(fd, "Must be root\n");
+ return false;
+ }
+ return true;
+}
+
+bool isValidValue(float value) {
+ return (value >= kLowerBound) && (value <= kUpperBound);
+}
+
+bool safelyParseInt(string s, int* out) {
+ if (!ParseInt(s, out)) {
+ return false;
+ }
+ return true;
+}
+} // namespace
+
+ndk::ScopedAStatus AudioControl::registerFocusListener(
+ const shared_ptr<IFocusListener>& in_listener) {
+
+ if (in_listener) {
+ std::atomic_store(&mFocusListener, in_listener);
+ } else {
+ LOG(ERROR) << "Unexpected nullptr for listener resulting in no-op.";
+ }
+ return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus AudioControl::setBalanceTowardRight(float value) {
+ if (isValidValue(value)) {
+ // Just log in this default mock implementation
+ LOG(INFO) << "Balance set to " << value;
+ return ndk::ScopedAStatus::ok();
+ }
+
+ LOG(ERROR) << "Balance value out of range -1 to 1 at " << value;
+ return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus AudioControl::setFadeTowardFront(float value) {
+ if (isValidValue(value)) {
+ // Just log in this default mock implementation
+ LOG(INFO) << "Fader set to " << value;
+ return ndk::ScopedAStatus::ok();
+ }
+ LOG(ERROR) << "Fader value out of range -1 to 1 at " << value;
+ return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus AudioControl::onAudioFocusChange(const string& in_usage, int32_t in_zoneId,
+ AudioFocusChange in_focusChange) {
+ LOG(INFO) << "Focus changed: " << toString(in_focusChange).c_str() << " for usage "
+ << in_usage.c_str() << " in zone " << in_zoneId;
+ return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus AudioControl::onDevicesToDuckChange(
+ const std::vector<DuckingInfo>& in_duckingInfos) {
+ LOG(DEBUG) << "AudioControl::onDevicesToDuckChange";
+ for (const DuckingInfo& duckingInfo : in_duckingInfos) {
+ LOG(DEBUG) << "zone: " << duckingInfo.zoneId;
+ LOG(DEBUG) << "Devices to duck:";
+ for (const auto& addressToDuck : duckingInfo.deviceAddressesToDuck) {
+ LOG(DEBUG) << addressToDuck;
+ set_device_address_is_ducked(addressToDuck.c_str(), true);
+ }
+
+ LOG(DEBUG) << "Devices to unduck:";
+ for (const auto& addressToUnduck : duckingInfo.deviceAddressesToUnduck) {
+ LOG(DEBUG) << addressToUnduck;
+ set_device_address_is_ducked(addressToUnduck.c_str(), false);
+ }
+ LOG(DEBUG) << "Usages holding focus:";
+ for (const auto& usage : duckingInfo.usagesHoldingFocus) {
+ LOG(DEBUG) << usage;
+ }
+ }
+ return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus AudioControl::onDevicesToMuteChange(
+ const std::vector<MutingInfo>& in_mutingInfos) {
+ LOG(DEBUG) << "AudioControl::onDevicesToMuteChange";
+ for (const MutingInfo& mutingInfo : in_mutingInfos) {
+ LOG(DEBUG) << "zone: " << mutingInfo.zoneId;
+ LOG(DEBUG) << "Devices to mute:";
+ for (const auto& addressToMute : mutingInfo.deviceAddressesToMute) {
+ LOG(DEBUG) << addressToMute;
+ set_device_address_is_muted(addressToMute.c_str(), true);
+ }
+ LOG(DEBUG) << "Devices to unmute:";
+ for (const auto& addressToUnmute : mutingInfo.deviceAddressesToUnmute) {
+ LOG(DEBUG) << addressToUnmute;
+ set_device_address_is_muted(addressToUnmute.c_str(), false);
+ }
+ }
+ return ndk::ScopedAStatus::ok();
+}
+
+binder_status_t AudioControl::dump(int fd, const char** args, uint32_t numArgs) {
+ if (numArgs == 0) {
+ return dumpsys(fd);
+ }
+
+ string option = string(args[0]);
+ if (EqualsIgnoreCase(option, "--help")) {
+ return cmdHelp(fd);
+ } else if (EqualsIgnoreCase(option, "--request")) {
+ return cmdRequestFocus(fd, args, numArgs);
+ } else if (EqualsIgnoreCase(option, "--abandon")) {
+ return cmdAbandonFocus(fd, args, numArgs);
+ } else {
+ dprintf(fd, "Invalid option: %s\n", option.c_str());
+ return STATUS_BAD_VALUE;
+ }
+}
+
+void AudioControl::setAudioEnabled(bool isEnabled) {
+ LOG(DEBUG) << "setAudioEnabled called with value: " << isEnabled;
+ set_audio_enabled(isEnabled);
+}
+
+binder_status_t AudioControl::dumpsys(int fd) {
+ dprintf(fd, "*%s*\n", LOG_TAG);
+ std::shared_ptr<IFocusListener> focusListener = std::atomic_load(&mFocusListener);
+ if (focusListener == nullptr) {
+ dprintf(fd, "No focus listener registered\n");
+ } else {
+ dprintf(fd, "Focus listener registered\n");
+ }
+ return STATUS_OK;
+}
+
+binder_status_t AudioControl::cmdHelp(int fd) const {
+ dprintf(fd, "Usage: \n\n");
+ dprintf(fd, "[no args]: dumps focus listener status\n");
+ dprintf(fd, "--help: shows this help\n");
+ dprintf(fd,
+ "--request <USAGE> <ZONE_ID> <FOCUS_GAIN>: requests audio focus for specified "
+ "usage (string), audio zone ID (int), and focus gain type (int)\n");
+ dprintf(fd,
+ "--abandon <USAGE> <ZONE_ID>: abandons audio focus for specified usage (string) and "
+ "audio zone ID (int)\n");
+ dprintf(fd, "See audio_policy_configuration.xsd for valid AudioUsage values.\n");
+ return STATUS_OK;
+}
+
+binder_status_t AudioControl::cmdRequestFocus(int fd, const char** args, uint32_t numArgs) {
+ if (!checkCallerHasWritePermissions(fd)) {
+ return STATUS_PERMISSION_DENIED;
+ }
+ if (numArgs != 4) {
+ dprintf(fd,
+ "Invalid number of arguments: please provide --request <USAGE> <ZONE_ID> "
+ "<FOCUS_GAIN>\n");
+ return STATUS_BAD_VALUE;
+ }
+
+ string usage = string(args[1]);
+ if (xsd::isUnknownAudioUsage(usage)) {
+ dprintf(fd,
+ "Unknown usage provided: %s. Please see audio_policy_configuration.xsd V7_0 "
+ "for supported values\n",
+ usage.c_str());
+ return STATUS_BAD_VALUE;
+ }
+
+ int zoneId;
+ if (!safelyParseInt(string(args[2]), &zoneId)) {
+ dprintf(fd, "Non-integer zoneId provided with request: %s\n", string(args[2]).c_str());
+ return STATUS_BAD_VALUE;
+ }
+
+ int focusGainValue;
+ if (!safelyParseInt(string(args[3]), &focusGainValue)) {
+ dprintf(fd, "Non-integer focusGain provided with request: %s\n", string(args[3]).c_str());
+ return STATUS_BAD_VALUE;
+ }
+ AudioFocusChange focusGain = AudioFocusChange(focusGainValue);
+
+ std::shared_ptr<IFocusListener> focusListener = std::atomic_load(&mFocusListener);
+ if (focusListener == nullptr) {
+ dprintf(fd, "Unable to request focus - no focus listener registered\n");
+ return STATUS_BAD_VALUE;
+ }
+
+ focusListener->requestAudioFocus(usage, zoneId, focusGain);
+ dprintf(fd, "Requested focus for usage %s, zoneId %d, and focusGain %d\n", usage.c_str(),
+ zoneId, focusGain);
+ return STATUS_OK;
+}
+
+binder_status_t AudioControl::cmdAbandonFocus(int fd, const char** args, uint32_t numArgs) {
+ if (!checkCallerHasWritePermissions(fd)) {
+ return STATUS_PERMISSION_DENIED;
+ }
+ if (numArgs != 3) {
+ dprintf(fd, "Invalid number of arguments: please provide --abandon <USAGE> <ZONE_ID>\n");
+ return STATUS_BAD_VALUE;
+ }
+
+ string usage = string(args[1]);
+ if (xsd::isUnknownAudioUsage(usage)) {
+ dprintf(fd,
+ "Unknown usage provided: %s. Please see audio_policy_configuration.xsd V7_0 "
+ "for supported values\n",
+ usage.c_str());
+ return STATUS_BAD_VALUE;
+ }
+
+ int zoneId;
+ if (!safelyParseInt(string(args[2]), &zoneId)) {
+ dprintf(fd, "Non-integer zoneId provided with abandon: %s\n", string(args[2]).c_str());
+ return STATUS_BAD_VALUE;
+ }
+
+ std::shared_ptr<IFocusListener> focusListener = std::atomic_load(&mFocusListener);
+ if (focusListener == nullptr) {
+ dprintf(fd, "Unable to abandon focus - no focus listener registered\n");
+ return STATUS_BAD_VALUE;
+ }
+
+ focusListener->abandonAudioFocus(usage, zoneId);
+ dprintf(fd, "Abandoned focus for usage %s and zoneId %d\n", usage.c_str(), zoneId);
+ return STATUS_OK;
+}
+
+} // namespace audiocontrol
+} // namespace automotive
+} // namespace hardware
+} // namespace android
+} // namespace aidl
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