services/oboeservice/AAudioService.cpp - LeafOS-Project/android_frameworks_av - Gitiles

 /*
  * Copyright (C) 2016 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 "AAudioService"
 //#define LOG_NDEBUG 0
 #include <utils/Log.h>

 #include <iomanip>
 #include <iostream>
 #include <sstream>

 #include <android/content/AttributionSourceState.h>
 #include <aaudio/AAudio.h>
 #include <media/AidlConversion.h>
 #include <mediautils/ServiceUtilities.h>
 #include <utils/String16.h>

 #include "binding/AAudioServiceMessage.h"
 #include "AAudioClientTracker.h"
 #include "AAudioEndpointManager.h"
 #include "AAudioService.h"
 #include "AAudioServiceStreamMMAP.h"
 #include "AAudioServiceStreamShared.h"

 using namespace android;
 using namespace aaudio;

 #define MAX_STREAMS_PER_PROCESS   8
 #define AIDL_RETURN(x) { *_aidl_return = (x); return Status::ok(); }

 #define VALUE_OR_RETURN_ILLEGAL_ARG_STATUS(x) \
     ({ auto _tmp = (x); \
        if (!_tmp.ok()) AIDL_RETURN(AAUDIO_ERROR_ILLEGAL_ARGUMENT); \
        std::move(_tmp.value()); })

 using android::AAudioService;
 using android::content::AttributionSourceState;
 using binder::Status;

 android::AAudioService::AAudioService()
     : BnAAudioService(),
       mAdapter(this) {
     // TODO consider using geteuid()
     // TODO b/182392769: use attribution source util
     mAudioClient.attributionSource.uid = VALUE_OR_FATAL(legacy2aidl_uid_t_int32_t(getuid()));
     mAudioClient.attributionSource.pid = VALUE_OR_FATAL(legacy2aidl_pid_t_int32_t(getpid()));
     mAudioClient.attributionSource.packageName = std::nullopt;
     mAudioClient.attributionSource.attributionTag = std::nullopt;
     AAudioClientTracker::getInstance().setAAudioService(this);
 }

 status_t AAudioService::dump(int fd, const Vector<String16>& args) {
     std::string result;

     if (!dumpAllowed()) {
         std::stringstream ss;
         ss << "Permission Denial: can't dump AAudioService from pid="
                 << IPCThreadState::self()->getCallingPid() << ", uid="
                 << IPCThreadState::self()->getCallingUid() << "\n";
         result = ss.str();
         ALOGW("%s", result.c_str());
     } else {
         result = "------------ AAudio Service ------------\n"
                  + mStreamTracker.dump()
                  + AAudioClientTracker::getInstance().dump()
                  + AAudioEndpointManager::getInstance().dump();
     }
     (void)write(fd, result.c_str(), result.size());
     return NO_ERROR;
 }

 Status AAudioService::registerClient(const sp<IAAudioClient> &client) {
     pid_t pid = IPCThreadState::self()->getCallingPid();
     AAudioClientTracker::getInstance().registerClient(pid, client);
     return Status::ok();
 }

 Status
 AAudioService::openStream(const StreamRequest &_request, StreamParameters* _paramsOut,
                           int32_t *_aidl_return) {
     static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

     // Create wrapper objects for simple usage of the parcelables.
     const AAudioStreamRequest request(_request);
     AAudioStreamConfiguration paramsOut;

     // A lock in is used to order the opening of endpoints when an
     // EXCLUSIVE endpoint is stolen. We want the order to be:
     // 1) Thread A opens exclusive MMAP endpoint
     // 2) Thread B wants to open an exclusive MMAP endpoint so it steals the one from A
     //    under this lock.
     // 3) Thread B opens a shared MMAP endpoint.
     // 4) Thread A can then get the lock and also open a shared stream.
     // Without the lock. Thread A might sneak in and reallocate an exclusive stream
     // before B can open the shared stream.
     std::unique_lock<std::recursive_mutex> lock(mOpenLock);

     aaudio_result_t result = AAUDIO_OK;
     sp<AAudioServiceStreamBase> serviceStream;
     const AAudioStreamConfiguration &configurationInput = request.getConstantConfiguration();
     bool sharingModeMatchRequired = request.isSharingModeMatchRequired();
     aaudio_sharing_mode_t sharingMode = configurationInput.getSharingMode();

     // Enforce limit on client processes.
     AttributionSourceState attributionSource = request.getAttributionSource();
     pid_t pid = IPCThreadState::self()->getCallingPid();
     attributionSource.pid = VALUE_OR_RETURN_ILLEGAL_ARG_STATUS(
         legacy2aidl_pid_t_int32_t(pid));
     attributionSource.uid = VALUE_OR_RETURN_ILLEGAL_ARG_STATUS(
         legacy2aidl_uid_t_int32_t(IPCThreadState::self()->getCallingUid()));
     attributionSource.token = sp<BBinder>::make();
     if (attributionSource.pid != mAudioClient.attributionSource.pid) {
         int32_t count = AAudioClientTracker::getInstance().getStreamCount(pid);
         if (count >= MAX_STREAMS_PER_PROCESS) {
             ALOGE("openStream(): exceeded max streams per process %d >= %d",
                   count,  MAX_STREAMS_PER_PROCESS);
             AIDL_RETURN(AAUDIO_ERROR_UNAVAILABLE);
         }
     }

     if (sharingMode != AAUDIO_SHARING_MODE_EXCLUSIVE && sharingMode != AAUDIO_SHARING_MODE_SHARED) {
         ALOGE("openStream(): unrecognized sharing mode = %d", sharingMode);
         AIDL_RETURN(AAUDIO_ERROR_ILLEGAL_ARGUMENT);
     }

     if (sharingMode == AAUDIO_SHARING_MODE_EXCLUSIVE
         && AAudioClientTracker::getInstance().isExclusiveEnabled(pid)) {
         // only trust audioserver for in service indication
         bool inService = false;
         if (isCallerInService()) {
             inService = request.isInService();
         }
         serviceStream = new AAudioServiceStreamMMAP(*this, inService);
         result = serviceStream->open(request);
         if (result != AAUDIO_OK) {
             // Clear it so we can possibly fall back to using a shared stream.
             ALOGW("openStream(), could not open in EXCLUSIVE mode");
             serviceStream.clear();
         }
     }

     // Try SHARED if SHARED requested or if EXCLUSIVE failed.
     if (sharingMode == AAUDIO_SHARING_MODE_SHARED) {
         serviceStream =  new AAudioServiceStreamShared(*this);
         result = serviceStream->open(request);
     } else if (serviceStream.get() == nullptr && !sharingModeMatchRequired) {
         aaudio::AAudioStreamRequest modifiedRequest = request;
         // Overwrite the original EXCLUSIVE mode with SHARED.
         modifiedRequest.getConfiguration().setSharingMode(AAUDIO_SHARING_MODE_SHARED);
         serviceStream =  new AAudioServiceStreamShared(*this);
         result = serviceStream->open(modifiedRequest);
     }

     if (result != AAUDIO_OK) {
         serviceStream.clear();
         AIDL_RETURN(result);
     } else {
         aaudio_handle_t handle = mStreamTracker.addStreamForHandle(serviceStream.get());
         serviceStream->setHandle(handle);
         AAudioClientTracker::getInstance().registerClientStream(pid, serviceStream);
         paramsOut.copyFrom(*serviceStream);
         *_paramsOut = std::move(paramsOut).parcelable();
         // Log open in MediaMetrics after we have the handle because we need the handle to
         // create the metrics ID.
         serviceStream->logOpen(handle);
         ALOGV("%s(): return handle = 0x%08X", __func__, handle);
         AIDL_RETURN(handle);
     }
 }

 Status AAudioService::closeStream(int32_t streamHandle, int32_t *_aidl_return) {
     static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

     // Check permission and ownership first.
     sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
     if (serviceStream.get() == nullptr) {
         ALOGE("closeStream(0x%0x), illegal stream handle", streamHandle);
         AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
     }
     AIDL_RETURN(closeStream(serviceStream));
 }

 Status AAudioService::getStreamDescription(int32_t streamHandle, Endpoint* endpoint,
                                            int32_t *_aidl_return) {
     static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

     sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
     if (serviceStream.get() == nullptr) {
         ALOGE("getStreamDescription(), illegal stream handle = 0x%0x", streamHandle);
         AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
     }
     AudioEndpointParcelable endpointParcelable;
     aaudio_result_t result = serviceStream->getDescription(endpointParcelable);
     if (result == AAUDIO_OK) {
         *endpoint = std::move(endpointParcelable).parcelable();
     }
     AIDL_RETURN(result);
 }

 Status AAudioService::startStream(int32_t streamHandle, int32_t *_aidl_return) {
     static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

     sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
     if (serviceStream.get() == nullptr) {
         ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
         AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
     }
     AIDL_RETURN(serviceStream->start());
 }

 Status AAudioService::pauseStream(int32_t streamHandle, int32_t *_aidl_return) {
     static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

     sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
     if (serviceStream.get() == nullptr) {
         ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
         AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
     }
     AIDL_RETURN(serviceStream->pause());
 }

 Status AAudioService::stopStream(int32_t streamHandle, int32_t *_aidl_return) {
     static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

     sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
     if (serviceStream.get() == nullptr) {
         ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
         AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
     }
     AIDL_RETURN(serviceStream->stop());
 }

 Status AAudioService::flushStream(int32_t streamHandle, int32_t *_aidl_return) {
     static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

     sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
     if (serviceStream.get() == nullptr) {
         ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
         AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
     }
     AIDL_RETURN(serviceStream->flush());
 }

 Status AAudioService::registerAudioThread(int32_t streamHandle, int32_t clientThreadId, int64_t periodNanoseconds,
                                           int32_t *_aidl_return) {
     static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

     sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
     if (serviceStream.get() == nullptr) {
         ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
         AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
     }
     int32_t priority = isCallerInService()
         ? kRealTimeAudioPriorityService : kRealTimeAudioPriorityClient;
     AIDL_RETURN(serviceStream->registerAudioThread(clientThreadId, priority));
 }

 Status AAudioService::unregisterAudioThread(int32_t streamHandle, int32_t clientThreadId,
                                             int32_t *_aidl_return) {
     static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

     sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
     if (serviceStream.get() == nullptr) {
         ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
         AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
     }
     AIDL_RETURN(serviceStream->unregisterAudioThread(clientThreadId));
 }

 bool AAudioService::isCallerInService() {
     pid_t clientPid = VALUE_OR_FATAL(aidl2legacy_int32_t_pid_t(mAudioClient.attributionSource.pid));
     uid_t clientUid = VALUE_OR_FATAL(aidl2legacy_int32_t_uid_t(mAudioClient.attributionSource.uid));
     return clientPid == IPCThreadState::self()->getCallingPid() &&
         clientUid == IPCThreadState::self()->getCallingUid();
 }

 aaudio_result_t AAudioService::closeStream(sp<AAudioServiceStreamBase> serviceStream) {
     // This is protected by a lock in AAudioClientTracker.
     // It is safe to unregister the same stream twice.
     pid_t pid = serviceStream->getOwnerProcessId();
     AAudioClientTracker::getInstance().unregisterClientStream(pid, serviceStream);
     // This is protected by a lock in mStreamTracker.
     // It is safe to remove the same stream twice.
     mStreamTracker.removeStreamByHandle(serviceStream->getHandle());

     return serviceStream->close();
 }

 sp<AAudioServiceStreamBase> AAudioService::convertHandleToServiceStream(
         aaudio_handle_t streamHandle) {
     sp<AAudioServiceStreamBase> serviceStream = mStreamTracker.getStreamByHandle(
             streamHandle);
     if (serviceStream.get() != nullptr) {
         // Only allow owner or the aaudio service to access the stream.
         const uid_t callingUserId = IPCThreadState::self()->getCallingUid();
         const uid_t ownerUserId = serviceStream->getOwnerUserId();
         const uid_t clientUid = VALUE_OR_FATAL(
             aidl2legacy_int32_t_uid_t(mAudioClient.attributionSource.uid));
         bool callerOwnsIt = callingUserId == ownerUserId;
         bool serverCalling = callingUserId == clientUid;
         bool serverOwnsIt = ownerUserId == clientUid;
         bool allowed = callerOwnsIt || serverCalling || serverOwnsIt;
         if (!allowed) {
             ALOGE("AAudioService: calling uid %d cannot access stream 0x%08X owned by %d",
                   callingUserId, streamHandle, ownerUserId);
             serviceStream.clear();
         }
     }
     return serviceStream;
 }

 aaudio_result_t AAudioService::startClient(aaudio_handle_t streamHandle,
                                            const android::AudioClient& client,
                                            const audio_attributes_t *attr,
                                            audio_port_handle_t *clientHandle) {
     sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
     if (serviceStream.get() == nullptr) {
         ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
         return AAUDIO_ERROR_INVALID_HANDLE;
     }
     return serviceStream->startClient(client, attr, clientHandle);
 }

 aaudio_result_t AAudioService::stopClient(aaudio_handle_t streamHandle,
                                           audio_port_handle_t portHandle) {
     sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
     if (serviceStream.get() == nullptr) {
         ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
         return AAUDIO_ERROR_INVALID_HANDLE;
     }
     return serviceStream->stopClient(portHandle);
 }

 // This is only called internally when AudioFlinger wants to tear down a stream.
 // So we do not have to check permissions.
 aaudio_result_t AAudioService::disconnectStreamByPortHandle(audio_port_handle_t portHandle) {
     ALOGD("%s(%d) called", __func__, portHandle);
     sp<AAudioServiceStreamBase> serviceStream =
             mStreamTracker.findStreamByPortHandle(portHandle);
     if (serviceStream.get() == nullptr) {
         ALOGE("%s(), could not find stream with portHandle = %d", __func__, portHandle);
         return AAUDIO_ERROR_INVALID_HANDLE;
     }
     // This is protected by a lock and will just return if already stopped.
     aaudio_result_t result = serviceStream->stop();
     serviceStream->disconnect();
     return result;
 }
	/*
	* Copyright (C) 2016 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 "AAudioService"
	//#define LOG_NDEBUG 0
	#include <utils/Log.h>

	#include <iomanip>
	#include <iostream>
	#include <sstream>

	#include <android/content/AttributionSourceState.h>
	#include <aaudio/AAudio.h>
	#include <media/AidlConversion.h>
	#include <mediautils/ServiceUtilities.h>
	#include <utils/String16.h>

	#include "binding/AAudioServiceMessage.h"
	#include "AAudioClientTracker.h"
	#include "AAudioEndpointManager.h"
	#include "AAudioService.h"
	#include "AAudioServiceStreamMMAP.h"
	#include "AAudioServiceStreamShared.h"

	using namespace android;
	using namespace aaudio;

	#define MAX_STREAMS_PER_PROCESS 8
	#define AIDL_RETURN(x) { *_aidl_return = (x); return Status::ok(); }

	#define VALUE_OR_RETURN_ILLEGAL_ARG_STATUS(x) \
	({ auto _tmp = (x); \
	if (!_tmp.ok()) AIDL_RETURN(AAUDIO_ERROR_ILLEGAL_ARGUMENT); \
	std::move(_tmp.value()); })

	using android::AAudioService;
	using android::content::AttributionSourceState;
	using binder::Status;

	android::AAudioService::AAudioService()
	: BnAAudioService(),
	mAdapter(this) {
	// TODO consider using geteuid()
	// TODO b/182392769: use attribution source util
	mAudioClient.attributionSource.uid = VALUE_OR_FATAL(legacy2aidl_uid_t_int32_t(getuid()));
	mAudioClient.attributionSource.pid = VALUE_OR_FATAL(legacy2aidl_pid_t_int32_t(getpid()));
	mAudioClient.attributionSource.packageName = std::nullopt;
	mAudioClient.attributionSource.attributionTag = std::nullopt;
	AAudioClientTracker::getInstance().setAAudioService(this);
	}

	status_t AAudioService::dump(int fd, const Vector<String16>& args) {
	std::string result;

	if (!dumpAllowed()) {
	std::stringstream ss;
	ss << "Permission Denial: can't dump AAudioService from pid="
	<< IPCThreadState::self()->getCallingPid() << ", uid="
	<< IPCThreadState::self()->getCallingUid() << "\n";
	result = ss.str();
	ALOGW("%s", result.c_str());
	} else {
	result = "------------ AAudio Service ------------\n"
	+ mStreamTracker.dump()
	+ AAudioClientTracker::getInstance().dump()
	+ AAudioEndpointManager::getInstance().dump();
	}
	(void)write(fd, result.c_str(), result.size());
	return NO_ERROR;
	}

	Status AAudioService::registerClient(const sp<IAAudioClient> &client) {
	pid_t pid = IPCThreadState::self()->getCallingPid();
	AAudioClientTracker::getInstance().registerClient(pid, client);
	return Status::ok();
	}

	Status
	AAudioService::openStream(const StreamRequest &_request, StreamParameters* _paramsOut,
	int32_t *_aidl_return) {
	static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

	// Create wrapper objects for simple usage of the parcelables.
	const AAudioStreamRequest request(_request);
	AAudioStreamConfiguration paramsOut;

	// A lock in is used to order the opening of endpoints when an
	// EXCLUSIVE endpoint is stolen. We want the order to be:
	// 1) Thread A opens exclusive MMAP endpoint
	// 2) Thread B wants to open an exclusive MMAP endpoint so it steals the one from A
	// under this lock.
	// 3) Thread B opens a shared MMAP endpoint.
	// 4) Thread A can then get the lock and also open a shared stream.
	// Without the lock. Thread A might sneak in and reallocate an exclusive stream
	// before B can open the shared stream.
	std::unique_lock<std::recursive_mutex> lock(mOpenLock);

	aaudio_result_t result = AAUDIO_OK;
	sp<AAudioServiceStreamBase> serviceStream;
	const AAudioStreamConfiguration &configurationInput = request.getConstantConfiguration();
	bool sharingModeMatchRequired = request.isSharingModeMatchRequired();
	aaudio_sharing_mode_t sharingMode = configurationInput.getSharingMode();

	// Enforce limit on client processes.
	AttributionSourceState attributionSource = request.getAttributionSource();
	pid_t pid = IPCThreadState::self()->getCallingPid();
	attributionSource.pid = VALUE_OR_RETURN_ILLEGAL_ARG_STATUS(
	legacy2aidl_pid_t_int32_t(pid));
	attributionSource.uid = VALUE_OR_RETURN_ILLEGAL_ARG_STATUS(
	legacy2aidl_uid_t_int32_t(IPCThreadState::self()->getCallingUid()));
	attributionSource.token = sp<BBinder>::make();
	if (attributionSource.pid != mAudioClient.attributionSource.pid) {
	int32_t count = AAudioClientTracker::getInstance().getStreamCount(pid);
	if (count >= MAX_STREAMS_PER_PROCESS) {
	ALOGE("openStream(): exceeded max streams per process %d >= %d",
	count, MAX_STREAMS_PER_PROCESS);
	AIDL_RETURN(AAUDIO_ERROR_UNAVAILABLE);
	}
	}

	if (sharingMode != AAUDIO_SHARING_MODE_EXCLUSIVE && sharingMode != AAUDIO_SHARING_MODE_SHARED) {
	ALOGE("openStream(): unrecognized sharing mode = %d", sharingMode);
	AIDL_RETURN(AAUDIO_ERROR_ILLEGAL_ARGUMENT);
	}

	if (sharingMode == AAUDIO_SHARING_MODE_EXCLUSIVE
	&& AAudioClientTracker::getInstance().isExclusiveEnabled(pid)) {
	// only trust audioserver for in service indication
	bool inService = false;
	if (isCallerInService()) {
	inService = request.isInService();
	}
	serviceStream = new AAudioServiceStreamMMAP(*this, inService);
	result = serviceStream->open(request);
	if (result != AAUDIO_OK) {
	// Clear it so we can possibly fall back to using a shared stream.
	ALOGW("openStream(), could not open in EXCLUSIVE mode");
	serviceStream.clear();
	}
	}

	// Try SHARED if SHARED requested or if EXCLUSIVE failed.
	if (sharingMode == AAUDIO_SHARING_MODE_SHARED) {
	serviceStream = new AAudioServiceStreamShared(*this);
	result = serviceStream->open(request);
	} else if (serviceStream.get() == nullptr && !sharingModeMatchRequired) {
	aaudio::AAudioStreamRequest modifiedRequest = request;
	// Overwrite the original EXCLUSIVE mode with SHARED.
	modifiedRequest.getConfiguration().setSharingMode(AAUDIO_SHARING_MODE_SHARED);
	serviceStream = new AAudioServiceStreamShared(*this);
	result = serviceStream->open(modifiedRequest);
	}

	if (result != AAUDIO_OK) {
	serviceStream.clear();
	AIDL_RETURN(result);
	} else {
	aaudio_handle_t handle = mStreamTracker.addStreamForHandle(serviceStream.get());
	serviceStream->setHandle(handle);
	AAudioClientTracker::getInstance().registerClientStream(pid, serviceStream);
	paramsOut.copyFrom(*serviceStream);
	*_paramsOut = std::move(paramsOut).parcelable();
	// Log open in MediaMetrics after we have the handle because we need the handle to
	// create the metrics ID.
	serviceStream->logOpen(handle);
	ALOGV("%s(): return handle = 0x%08X", __func__, handle);
	AIDL_RETURN(handle);
	}
	}

	Status AAudioService::closeStream(int32_t streamHandle, int32_t *_aidl_return) {
	static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

	// Check permission and ownership first.
	sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
	if (serviceStream.get() == nullptr) {
	ALOGE("closeStream(0x%0x), illegal stream handle", streamHandle);
	AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
	}
	AIDL_RETURN(closeStream(serviceStream));
	}

	Status AAudioService::getStreamDescription(int32_t streamHandle, Endpoint* endpoint,
	int32_t *_aidl_return) {
	static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

	sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
	if (serviceStream.get() == nullptr) {
	ALOGE("getStreamDescription(), illegal stream handle = 0x%0x", streamHandle);
	AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
	}
	AudioEndpointParcelable endpointParcelable;
	aaudio_result_t result = serviceStream->getDescription(endpointParcelable);
	if (result == AAUDIO_OK) {
	*endpoint = std::move(endpointParcelable).parcelable();
	}
	AIDL_RETURN(result);
	}

	Status AAudioService::startStream(int32_t streamHandle, int32_t *_aidl_return) {
	static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

	sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
	if (serviceStream.get() == nullptr) {
	ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
	AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
	}
	AIDL_RETURN(serviceStream->start());
	}

	Status AAudioService::pauseStream(int32_t streamHandle, int32_t *_aidl_return) {
	static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

	sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
	if (serviceStream.get() == nullptr) {
	ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
	AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
	}
	AIDL_RETURN(serviceStream->pause());
	}

	Status AAudioService::stopStream(int32_t streamHandle, int32_t *_aidl_return) {
	static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

	sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
	if (serviceStream.get() == nullptr) {
	ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
	AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
	}
	AIDL_RETURN(serviceStream->stop());
	}

	Status AAudioService::flushStream(int32_t streamHandle, int32_t *_aidl_return) {
	static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

	sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
	if (serviceStream.get() == nullptr) {
	ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
	AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
	}
	AIDL_RETURN(serviceStream->flush());
	}

	Status AAudioService::registerAudioThread(int32_t streamHandle, int32_t clientThreadId, int64_t periodNanoseconds,
	int32_t *_aidl_return) {
	static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

	sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
	if (serviceStream.get() == nullptr) {
	ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
	AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
	}
	int32_t priority = isCallerInService()
	? kRealTimeAudioPriorityService : kRealTimeAudioPriorityClient;
	AIDL_RETURN(serviceStream->registerAudioThread(clientThreadId, priority));
	}

	Status AAudioService::unregisterAudioThread(int32_t streamHandle, int32_t clientThreadId,
	int32_t *_aidl_return) {
	static_assert(std::is_same_v<aaudio_result_t, std::decay_t<typeof(*_aidl_return)>>);

	sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
	if (serviceStream.get() == nullptr) {
	ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
	AIDL_RETURN(AAUDIO_ERROR_INVALID_HANDLE);
	}
	AIDL_RETURN(serviceStream->unregisterAudioThread(clientThreadId));
	}

	bool AAudioService::isCallerInService() {
	pid_t clientPid = VALUE_OR_FATAL(aidl2legacy_int32_t_pid_t(mAudioClient.attributionSource.pid));
	uid_t clientUid = VALUE_OR_FATAL(aidl2legacy_int32_t_uid_t(mAudioClient.attributionSource.uid));
	return clientPid == IPCThreadState::self()->getCallingPid() &&
	clientUid == IPCThreadState::self()->getCallingUid();
	}

	aaudio_result_t AAudioService::closeStream(sp<AAudioServiceStreamBase> serviceStream) {
	// This is protected by a lock in AAudioClientTracker.
	// It is safe to unregister the same stream twice.
	pid_t pid = serviceStream->getOwnerProcessId();
	AAudioClientTracker::getInstance().unregisterClientStream(pid, serviceStream);
	// This is protected by a lock in mStreamTracker.
	// It is safe to remove the same stream twice.
	mStreamTracker.removeStreamByHandle(serviceStream->getHandle());

	return serviceStream->close();
	}

	sp<AAudioServiceStreamBase> AAudioService::convertHandleToServiceStream(
	aaudio_handle_t streamHandle) {
	sp<AAudioServiceStreamBase> serviceStream = mStreamTracker.getStreamByHandle(
	streamHandle);
	if (serviceStream.get() != nullptr) {
	// Only allow owner or the aaudio service to access the stream.
	const uid_t callingUserId = IPCThreadState::self()->getCallingUid();
	const uid_t ownerUserId = serviceStream->getOwnerUserId();
	const uid_t clientUid = VALUE_OR_FATAL(
	aidl2legacy_int32_t_uid_t(mAudioClient.attributionSource.uid));
	bool callerOwnsIt = callingUserId == ownerUserId;
	bool serverCalling = callingUserId == clientUid;
	bool serverOwnsIt = ownerUserId == clientUid;
	bool allowed = callerOwnsIt \|\| serverCalling \|\| serverOwnsIt;
	if (!allowed) {
	ALOGE("AAudioService: calling uid %d cannot access stream 0x%08X owned by %d",
	callingUserId, streamHandle, ownerUserId);
	serviceStream.clear();
	}
	}
	return serviceStream;
	}

	aaudio_result_t AAudioService::startClient(aaudio_handle_t streamHandle,
	const android::AudioClient& client,
	const audio_attributes_t *attr,
	audio_port_handle_t *clientHandle) {
	sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
	if (serviceStream.get() == nullptr) {
	ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
	return AAUDIO_ERROR_INVALID_HANDLE;
	}
	return serviceStream->startClient(client, attr, clientHandle);
	}

	aaudio_result_t AAudioService::stopClient(aaudio_handle_t streamHandle,
	audio_port_handle_t portHandle) {
	sp<AAudioServiceStreamBase> serviceStream = convertHandleToServiceStream(streamHandle);
	if (serviceStream.get() == nullptr) {
	ALOGW("%s(), invalid streamHandle = 0x%0x", __func__, streamHandle);
	return AAUDIO_ERROR_INVALID_HANDLE;
	}
	return serviceStream->stopClient(portHandle);
	}

	// This is only called internally when AudioFlinger wants to tear down a stream.
	// So we do not have to check permissions.
	aaudio_result_t AAudioService::disconnectStreamByPortHandle(audio_port_handle_t portHandle) {
	ALOGD("%s(%d) called", __func__, portHandle);
	sp<AAudioServiceStreamBase> serviceStream =
	mStreamTracker.findStreamByPortHandle(portHandle);
	if (serviceStream.get() == nullptr) {
	ALOGE("%s(), could not find stream with portHandle = %d", __func__, portHandle);
	return AAUDIO_ERROR_INVALID_HANDLE;
	}
	// This is protected by a lock and will just return if already stopped.
	aaudio_result_t result = serviceStream->stop();
	serviceStream->disconnect();
	return result;
	}