AOSP AIDL USB audio HAL implementation.
Bug: 266216550
Test: atest VtsHalAudioCoreTargetTest
Change-Id: I82e053d3f6a918cafe0d43b030f724f63a99eb2a
diff --git a/audio/aidl/common/include/Utils.h b/audio/aidl/common/include/Utils.h
index 2aaa781..d87bbd4 100644
--- a/audio/aidl/common/include/Utils.h
+++ b/audio/aidl/common/include/Utils.h
@@ -104,6 +104,30 @@
device == ::aidl::android::media::audio::common::AudioDeviceType::OUT_TELEPHONY_TX;
}
+constexpr bool isUsbInputDeviceType(::aidl::android::media::audio::common::AudioDeviceType type) {
+ switch (type) {
+ case ::aidl::android::media::audio::common::AudioDeviceType::IN_DOCK:
+ case ::aidl::android::media::audio::common::AudioDeviceType::IN_ACCESSORY:
+ case ::aidl::android::media::audio::common::AudioDeviceType::IN_DEVICE:
+ case ::aidl::android::media::audio::common::AudioDeviceType::IN_HEADSET:
+ return true;
+ default:
+ return false;
+ }
+}
+
+constexpr bool isUsbOutputtDeviceType(::aidl::android::media::audio::common::AudioDeviceType type) {
+ switch (type) {
+ case ::aidl::android::media::audio::common::AudioDeviceType::OUT_DOCK:
+ case ::aidl::android::media::audio::common::AudioDeviceType::OUT_ACCESSORY:
+ case ::aidl::android::media::audio::common::AudioDeviceType::OUT_DEVICE:
+ case ::aidl::android::media::audio::common::AudioDeviceType::OUT_HEADSET:
+ return true;
+ default:
+ return false;
+ }
+}
+
constexpr bool isValidAudioMode(::aidl::android::media::audio::common::AudioMode mode) {
return std::find(kValidAudioModes.begin(), kValidAudioModes.end(), mode) !=
kValidAudioModes.end();
diff --git a/audio/aidl/default/Android.bp b/audio/aidl/default/Android.bp
index 856f83f..21616be 100644
--- a/audio/aidl/default/Android.bp
+++ b/audio/aidl/default/Android.bp
@@ -11,12 +11,14 @@
name: "aidlaudioservice_defaults",
vendor: true,
shared_libs: [
+ "libalsautilsv2",
"libaudioaidlcommon",
"libbase",
"libbinder_ndk",
"libcutils",
"libfmq",
"libstagefright_foundation",
+ "libtinyalsav2",
"libutils",
"libxml2",
"android.hardware.common-V2-ndk",
@@ -71,6 +73,9 @@
"Stream.cpp",
"StreamStub.cpp",
"Telephony.cpp",
+ "usb/ModuleUsb.cpp",
+ "usb/StreamUsb.cpp",
+ "usb/UsbAlsaUtils.cpp",
],
generated_sources: [
"audio_policy_configuration_aidl_default",
diff --git a/audio/aidl/default/Module.cpp b/audio/aidl/default/Module.cpp
index 905ff2c..2f6ab2f 100644
--- a/audio/aidl/default/Module.cpp
+++ b/audio/aidl/default/Module.cpp
@@ -27,8 +27,10 @@
#include "core-impl/Bluetooth.h"
#include "core-impl/Module.h"
+#include "core-impl/ModuleUsb.h"
#include "core-impl/SoundDose.h"
#include "core-impl/StreamStub.h"
+#include "core-impl/StreamUsb.h"
#include "core-impl/Telephony.h"
#include "core-impl/utils.h"
@@ -104,6 +106,42 @@
} // namespace
+// static
+std::shared_ptr<Module> Module::createInstance(Type type) {
+ switch (type) {
+ case Module::Type::USB:
+ return ndk::SharedRefBase::make<ModuleUsb>(type);
+ case Type::DEFAULT:
+ case Type::R_SUBMIX:
+ default:
+ return ndk::SharedRefBase::make<Module>(type);
+ }
+}
+
+// static
+StreamIn::CreateInstance Module::getStreamInCreator(Type type) {
+ switch (type) {
+ case Type::USB:
+ return StreamInUsb::createInstance;
+ case Type::DEFAULT:
+ case Type::R_SUBMIX:
+ default:
+ return StreamInStub::createInstance;
+ }
+}
+
+// static
+StreamOut::CreateInstance Module::getStreamOutCreator(Type type) {
+ switch (type) {
+ case Type::USB:
+ return StreamOutUsb::createInstance;
+ case Type::DEFAULT:
+ case Type::R_SUBMIX:
+ default:
+ return StreamOutStub::createInstance;
+ }
+}
+
void Module::cleanUpPatch(int32_t patchId) {
erase_all_values(mPatches, std::set<int32_t>{patchId});
}
@@ -153,6 +191,7 @@
std::make_unique<StreamContext::CommandMQ>(1, true /*configureEventFlagWord*/),
std::make_unique<StreamContext::ReplyMQ>(1, true /*configureEventFlagWord*/),
portConfigIt->format.value(), portConfigIt->channelMask.value(),
+ portConfigIt->sampleRate.value().value,
std::make_unique<StreamContext::DataMQ>(frameSize * in_bufferSizeFrames),
asyncCallback, outEventCallback, params);
if (temp.isValid()) {
@@ -261,6 +300,7 @@
break;
case Type::USB:
mConfig = std::move(internal::getUsbConfiguration());
+ break;
}
}
return *mConfig;
@@ -401,6 +441,8 @@
if (!mDebug.simulateDeviceConnections) {
// In a real HAL here we would attempt querying the profiles from the device.
LOG(ERROR) << __func__ << ": failed to query supported device profiles";
+ // TODO: Check the return value when it is ready for actual devices.
+ populateConnectedDevicePort(&connectedPort);
return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
}
@@ -560,10 +602,9 @@
}
context.fillDescriptor(&_aidl_return->desc);
std::shared_ptr<StreamIn> stream;
- // TODO: Add a mapping from module instance names to a corresponding 'createInstance'.
- if (auto status = StreamInStub::createInstance(in_args.sinkMetadata, std::move(context),
- mConfig->microphones, &stream);
- !status.isOk()) {
+ ndk::ScopedAStatus status = getStreamInCreator(mType)(in_args.sinkMetadata, std::move(context),
+ mConfig->microphones, &stream);
+ if (!status.isOk()) {
return status;
}
StreamWrapper streamWrapper(stream);
@@ -615,10 +656,9 @@
}
context.fillDescriptor(&_aidl_return->desc);
std::shared_ptr<StreamOut> stream;
- // TODO: Add a mapping from module instance names to a corresponding 'createInstance'.
- if (auto status = StreamOutStub::createInstance(in_args.sourceMetadata, std::move(context),
- in_args.offloadInfo, &stream);
- !status.isOk()) {
+ ndk::ScopedAStatus status = getStreamOutCreator(mType)(
+ in_args.sourceMetadata, std::move(context), in_args.offloadInfo, &stream);
+ if (!status.isOk()) {
return status;
}
StreamWrapper streamWrapper(stream);
@@ -696,6 +736,10 @@
}
}
+ if (auto status = checkAudioPatchEndpointsMatch(sources, sinks); !status.isOk()) {
+ return status;
+ }
+
auto& patches = getConfig().patches;
auto existing = patches.end();
std::optional<decltype(mPatches)> patchesBackup;
@@ -1190,4 +1234,16 @@
return mIsMmapSupported.value();
}
+ndk::ScopedAStatus Module::populateConnectedDevicePort(AudioPort* audioPort __unused) {
+ LOG(DEBUG) << __func__ << ": do nothing and return ok";
+ return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus Module::checkAudioPatchEndpointsMatch(
+ const std::vector<AudioPortConfig*>& sources __unused,
+ const std::vector<AudioPortConfig*>& sinks __unused) {
+ LOG(DEBUG) << __func__ << ": do nothing and return ok";
+ return ndk::ScopedAStatus::ok();
+}
+
} // namespace aidl::android::hardware::audio::core
diff --git a/audio/aidl/default/StreamStub.cpp b/audio/aidl/default/StreamStub.cpp
index 5442179..85d1e16 100644
--- a/audio/aidl/default/StreamStub.cpp
+++ b/audio/aidl/default/StreamStub.cpp
@@ -22,6 +22,7 @@
using aidl::android::hardware::audio::common::SinkMetadata;
using aidl::android::hardware::audio::common::SourceMetadata;
+using aidl::android::media::audio::common::AudioDevice;
using aidl::android::media::audio::common::AudioOffloadInfo;
namespace aidl::android::hardware::audio::core {
@@ -68,6 +69,11 @@
return ::android::OK;
}
+::android::status_t DriverStub::setConnectedDevices(
+ const std::vector<AudioDevice>& connectedDevices __unused) {
+ return ::android::OK;
+}
+
// static
ndk::ScopedAStatus StreamInStub::createInstance(const SinkMetadata& sinkMetadata,
StreamContext&& context,
diff --git a/audio/aidl/default/include/core-impl/Module.h b/audio/aidl/default/include/core-impl/Module.h
index 80a22dc..fab1c14 100644
--- a/audio/aidl/default/include/core-impl/Module.h
+++ b/audio/aidl/default/include/core-impl/Module.h
@@ -35,6 +35,10 @@
explicit Module(Type type) : mType(type) {}
+ static std::shared_ptr<Module> createInstance(Type type);
+ static StreamIn::CreateInstance getStreamInCreator(Type type);
+ static StreamOut::CreateInstance getStreamOutCreator(Type type);
+
private:
struct VendorDebug {
static const std::string kForceTransientBurstName;
@@ -163,6 +167,17 @@
std::shared_ptr<sounddose::ISoundDose> mSoundDose;
ndk::SpAIBinder mSoundDoseBinder;
std::optional<bool> mIsMmapSupported;
+
+ protected:
+ // If the module is unable to populate the connected device port correctly, the returned error
+ // code must correspond to the errors of `IModule.connectedExternalDevice` method.
+ virtual ndk::ScopedAStatus populateConnectedDevicePort(
+ ::aidl::android::media::audio::common::AudioPort* audioPort);
+ // If the module finds that the patch endpoints configurations are not matched, the returned
+ // error code must correspond to the errors of `IModule.setAudioPatch` method.
+ virtual ndk::ScopedAStatus checkAudioPatchEndpointsMatch(
+ const std::vector<::aidl::android::media::audio::common::AudioPortConfig*>& sources,
+ const std::vector<::aidl::android::media::audio::common::AudioPortConfig*>& sinks);
};
} // namespace aidl::android::hardware::audio::core
diff --git a/audio/aidl/default/include/core-impl/ModuleUsb.h b/audio/aidl/default/include/core-impl/ModuleUsb.h
new file mode 100644
index 0000000..7b177e8
--- /dev/null
+++ b/audio/aidl/default/include/core-impl/ModuleUsb.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+#pragma once
+
+#include "core-impl/Module.h"
+
+namespace aidl::android::hardware::audio::core {
+
+class ModuleUsb : public Module {
+ public:
+ explicit ModuleUsb(Module::Type type) : Module(type) {}
+
+ private:
+ // IModule interfaces
+ ndk::ScopedAStatus getTelephony(std::shared_ptr<ITelephony>* _aidl_return) override;
+ ndk::ScopedAStatus getBluetooth(std::shared_ptr<IBluetooth>* _aidl_return) override;
+ ndk::ScopedAStatus getMasterMute(bool* _aidl_return) override;
+ ndk::ScopedAStatus setMasterMute(bool in_mute) override;
+ ndk::ScopedAStatus getMasterVolume(float* _aidl_return) override;
+ ndk::ScopedAStatus setMasterVolume(float in_volume) override;
+ ndk::ScopedAStatus getMicMute(bool* _aidl_return) override;
+ ndk::ScopedAStatus setMicMute(bool in_mute) override;
+
+ // Module interfaces
+ ndk::ScopedAStatus populateConnectedDevicePort(
+ ::aidl::android::media::audio::common::AudioPort* audioPort) override;
+ ndk::ScopedAStatus checkAudioPatchEndpointsMatch(
+ const std::vector<::aidl::android::media::audio::common::AudioPortConfig*>& sources,
+ const std::vector<::aidl::android::media::audio::common::AudioPortConfig*>& sinks)
+ override;
+};
+
+} // namespace aidl::android::hardware::audio::core
diff --git a/audio/aidl/default/include/core-impl/Stream.h b/audio/aidl/default/include/core-impl/Stream.h
index 7cd4259..f8c12e6 100644
--- a/audio/aidl/default/include/core-impl/Stream.h
+++ b/audio/aidl/default/include/core-impl/Stream.h
@@ -77,7 +77,8 @@
StreamContext(std::unique_ptr<CommandMQ> commandMQ, std::unique_ptr<ReplyMQ> replyMQ,
const ::aidl::android::media::audio::common::AudioFormatDescription& format,
const ::aidl::android::media::audio::common::AudioChannelLayout& channelLayout,
- std::unique_ptr<DataMQ> dataMQ, std::shared_ptr<IStreamCallback> asyncCallback,
+ int sampleRate, std::unique_ptr<DataMQ> dataMQ,
+ std::shared_ptr<IStreamCallback> asyncCallback,
std::shared_ptr<IStreamOutEventCallback> outEventCallback,
DebugParameters debugParameters)
: mCommandMQ(std::move(commandMQ)),
@@ -85,6 +86,7 @@
mReplyMQ(std::move(replyMQ)),
mFormat(format),
mChannelLayout(channelLayout),
+ mSampleRate(sampleRate),
mDataMQ(std::move(dataMQ)),
mAsyncCallback(asyncCallback),
mOutEventCallback(outEventCallback),
@@ -95,6 +97,7 @@
mReplyMQ(std::move(other.mReplyMQ)),
mFormat(other.mFormat),
mChannelLayout(other.mChannelLayout),
+ mSampleRate(other.mSampleRate),
mDataMQ(std::move(other.mDataMQ)),
mAsyncCallback(std::move(other.mAsyncCallback)),
mOutEventCallback(std::move(other.mOutEventCallback)),
@@ -105,6 +108,7 @@
mReplyMQ = std::move(other.mReplyMQ);
mFormat = std::move(other.mFormat);
mChannelLayout = std::move(other.mChannelLayout);
+ mSampleRate = other.mSampleRate;
mDataMQ = std::move(other.mDataMQ);
mAsyncCallback = std::move(other.mAsyncCallback);
mOutEventCallback = std::move(other.mOutEventCallback);
@@ -131,6 +135,7 @@
}
ReplyMQ* getReplyMQ() const { return mReplyMQ.get(); }
int getTransientStateDelayMs() const { return mDebugParameters.transientStateDelayMs; }
+ int getSampleRate() const { return mSampleRate; }
bool isValid() const;
void reset();
@@ -140,6 +145,7 @@
std::unique_ptr<ReplyMQ> mReplyMQ;
::aidl::android::media::audio::common::AudioFormatDescription mFormat;
::aidl::android::media::audio::common::AudioChannelLayout mChannelLayout;
+ int mSampleRate;
std::unique_ptr<DataMQ> mDataMQ;
std::shared_ptr<IStreamCallback> mAsyncCallback;
std::shared_ptr<IStreamOutEventCallback> mOutEventCallback; // Only used by output streams
@@ -151,6 +157,11 @@
virtual ~DriverInterface() = default;
// This function is called once, on the main thread, before starting the worker thread.
virtual ::android::status_t init() = 0;
+ // This function is called from Binder pool thread. It must be done in a thread-safe manner
+ // if this method and other methods in this interface share data.
+ virtual ::android::status_t setConnectedDevices(
+ const std::vector<::aidl::android::media::audio::common::AudioDevice>&
+ connectedDevices) = 0;
// All the functions below are called on the worker thread.
virtual ::android::status_t drain(StreamDescriptor::DrainMode mode) = 0;
virtual ::android::status_t flush() = 0;
@@ -370,6 +381,7 @@
const std::vector<::aidl::android::media::audio::common::AudioDevice>& devices) {
mWorker->setIsConnected(!devices.empty());
mConnectedDevices = devices;
+ mDriver->setConnectedDevices(devices);
}
ndk::ScopedAStatus updateMetadata(const Metadata& metadata);
diff --git a/audio/aidl/default/include/core-impl/StreamStub.h b/audio/aidl/default/include/core-impl/StreamStub.h
index 98a062a..aea9da5 100644
--- a/audio/aidl/default/include/core-impl/StreamStub.h
+++ b/audio/aidl/default/include/core-impl/StreamStub.h
@@ -24,6 +24,9 @@
public:
DriverStub(const StreamContext& context, bool isInput);
::android::status_t init() override;
+ ::android::status_t setConnectedDevices(
+ const std::vector<::aidl::android::media::audio::common::AudioDevice>& connectedDevices)
+ override;
::android::status_t drain(StreamDescriptor::DrainMode) override;
::android::status_t flush() override;
::android::status_t pause() override;
diff --git a/audio/aidl/default/include/core-impl/StreamUsb.h b/audio/aidl/default/include/core-impl/StreamUsb.h
new file mode 100644
index 0000000..8ac1f34
--- /dev/null
+++ b/audio/aidl/default/include/core-impl/StreamUsb.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+#pragma once
+
+#include <mutex>
+
+#include <aidl/android/media/audio/common/AudioChannelLayout.h>
+
+#include "core-impl/Stream.h"
+
+extern "C" {
+#include <tinyalsa/pcm.h>
+#include "alsa_device_proxy.h"
+}
+
+namespace aidl::android::hardware::audio::core {
+
+class DriverUsb : public DriverInterface {
+ public:
+ DriverUsb(const StreamContext& context, bool isInput);
+ ::android::status_t init() override;
+ ::android::status_t setConnectedDevices(
+ const std::vector<::aidl::android::media::audio::common::AudioDevice>& connectedDevices)
+ override;
+ ::android::status_t drain(StreamDescriptor::DrainMode) override;
+ ::android::status_t flush() override;
+ ::android::status_t pause() override;
+ ::android::status_t transfer(void* buffer, size_t frameCount, size_t* actualFrameCount,
+ int32_t* latencyMs) override;
+ ::android::status_t standby() override;
+
+ private:
+ ::android::status_t exitStandby();
+
+ std::mutex mLock;
+
+ const size_t mFrameSizeBytes;
+ std::optional<struct pcm_config> mConfig;
+ const bool mIsInput;
+ // Cached device addresses for connected devices.
+ std::vector<::aidl::android::media::audio::common::AudioDeviceAddress> mConnectedDevices
+ GUARDED_BY(mLock);
+ std::vector<std::shared_ptr<alsa_device_proxy>> mAlsaDeviceProxies GUARDED_BY(mLock);
+ bool mIsStandby = false;
+};
+
+class StreamInUsb final : public StreamIn {
+ ndk::ScopedAStatus getActiveMicrophones(
+ std::vector<MicrophoneDynamicInfo>* _aidl_return) override;
+
+ public:
+ static ndk::ScopedAStatus createInstance(
+ const ::aidl::android::hardware::audio::common::SinkMetadata& sinkMetadata,
+ StreamContext&& context, const std::vector<MicrophoneInfo>& microphones,
+ std::shared_ptr<StreamIn>* result);
+
+ private:
+ friend class ndk::SharedRefBase;
+ StreamInUsb(const ::aidl::android::hardware::audio::common::SinkMetadata& sinkMetadata,
+ StreamContext&& context, const std::vector<MicrophoneInfo>& microphones);
+};
+
+class StreamOutUsb final : public StreamOut {
+ public:
+ static ndk::ScopedAStatus createInstance(
+ const ::aidl::android::hardware::audio::common::SourceMetadata& sourceMetadata,
+ StreamContext&& context,
+ const std::optional<::aidl::android::media::audio::common::AudioOffloadInfo>&
+ offloadInfo,
+ std::shared_ptr<StreamOut>* result);
+
+ private:
+ friend class ndk::SharedRefBase;
+ StreamOutUsb(const ::aidl::android::hardware::audio::common::SourceMetadata& sourceMetadata,
+ StreamContext&& context,
+ const std::optional<::aidl::android::media::audio::common::AudioOffloadInfo>&
+ offloadInfo);
+};
+
+} // namespace aidl::android::hardware::audio::core
diff --git a/audio/aidl/default/include/core-impl/utils.h b/audio/aidl/default/include/core-impl/utils.h
index 9d06f08..ae33227 100644
--- a/audio/aidl/default/include/core-impl/utils.h
+++ b/audio/aidl/default/include/core-impl/utils.h
@@ -17,6 +17,7 @@
#pragma once
#include <algorithm>
+#include <map>
#include <set>
#include <vector>
@@ -101,4 +102,21 @@
return result;
}
+// Assuming that M is a map whose keys' type is K and values' type is V,
+// return the corresponding value of the given key from the map or default
+// value if the key is not found.
+template <typename M, typename K, typename V>
+auto findValueOrDefault(const M& m, const K& key, V defaultValue) {
+ auto it = m.find(key);
+ return it == m.end() ? defaultValue : it->second;
+}
+
+// Assuming that M is a map whose keys' type is K, return the given key if it
+// is found from the map or default value.
+template <typename M, typename K>
+auto findKeyOrDefault(const M& m, const K& key, K defaultValue) {
+ auto it = m.find(key);
+ return it == m.end() ? defaultValue : key;
+}
+
} // namespace aidl::android::hardware::audio::core
diff --git a/audio/aidl/default/main.cpp b/audio/aidl/default/main.cpp
index 1933509..aeca8bc 100644
--- a/audio/aidl/default/main.cpp
+++ b/audio/aidl/default/main.cpp
@@ -25,9 +25,11 @@
#include "core-impl/Config.h"
#include "core-impl/Module.h"
+#include "core-impl/ModuleUsb.h"
using aidl::android::hardware::audio::core::Config;
using aidl::android::hardware::audio::core::Module;
+using aidl::android::hardware::audio::core::ModuleUsb;
int main() {
// Random values are used in the implementation.
@@ -46,7 +48,7 @@
// Make modules
auto createModule = [](Module::Type type, const std::string& instance) {
- auto module = ndk::SharedRefBase::make<Module>(type);
+ auto module = Module::createInstance(type);
ndk::SpAIBinder moduleBinder = module->asBinder();
const std::string moduleName = std::string(Module::descriptor).append("/").append(instance);
AIBinder_setMinSchedulerPolicy(moduleBinder.get(), SCHED_NORMAL, ANDROID_PRIORITY_AUDIO);
diff --git a/audio/aidl/default/usb/ModuleUsb.cpp b/audio/aidl/default/usb/ModuleUsb.cpp
new file mode 100644
index 0000000..e803420
--- /dev/null
+++ b/audio/aidl/default/usb/ModuleUsb.cpp
@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) 2023 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 "AHAL_ModuleUsb"
+
+#include <vector>
+
+#include <Utils.h>
+#include <android-base/logging.h>
+#include <tinyalsa/asoundlib.h>
+
+#include "UsbAlsaUtils.h"
+#include "core-impl/ModuleUsb.h"
+
+extern "C" {
+#include "alsa_device_profile.h"
+}
+
+using aidl::android::media::audio::common::AudioChannelLayout;
+using aidl::android::media::audio::common::AudioDeviceAddress;
+using aidl::android::media::audio::common::AudioDeviceDescription;
+using aidl::android::media::audio::common::AudioDeviceType;
+using aidl::android::media::audio::common::AudioFormatDescription;
+using aidl::android::media::audio::common::AudioFormatType;
+using aidl::android::media::audio::common::AudioPort;
+using aidl::android::media::audio::common::AudioPortConfig;
+using aidl::android::media::audio::common::AudioPortExt;
+using aidl::android::media::audio::common::AudioProfile;
+using android::hardware::audio::common::isUsbInputDeviceType;
+
+namespace aidl::android::hardware::audio::core {
+
+namespace {
+
+std::vector<AudioChannelLayout> populateChannelMasksFromProfile(const alsa_device_profile* profile,
+ bool isInput) {
+ std::vector<AudioChannelLayout> channels;
+ for (size_t i = 0; i < AUDIO_PORT_MAX_CHANNEL_MASKS && profile->channel_counts[i] != 0; ++i) {
+ auto layoutMask =
+ usb::getChannelLayoutMaskFromChannelCount(profile->channel_counts[i], isInput);
+ if (layoutMask.getTag() == AudioChannelLayout::Tag::layoutMask) {
+ channels.push_back(layoutMask);
+ }
+ auto indexMask = usb::getChannelIndexMaskFromChannelCount(profile->channel_counts[i]);
+ if (indexMask.getTag() == AudioChannelLayout::Tag::indexMask) {
+ channels.push_back(indexMask);
+ }
+ }
+ return channels;
+}
+
+std::vector<int> populateSampleRatesFromProfile(const alsa_device_profile* profile) {
+ std::vector<int> sampleRates;
+ for (int i = 0; i < std::min(MAX_PROFILE_SAMPLE_RATES, AUDIO_PORT_MAX_SAMPLING_RATES) &&
+ profile->sample_rates[i] != 0;
+ i++) {
+ sampleRates.push_back(profile->sample_rates[i]);
+ }
+ return sampleRates;
+}
+
+} // namespace
+
+ndk::ScopedAStatus ModuleUsb::getTelephony(std::shared_ptr<ITelephony>* _aidl_return) {
+ *_aidl_return = nullptr;
+ LOG(DEBUG) << __func__ << ": returning null";
+ return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus ModuleUsb::getBluetooth(std::shared_ptr<IBluetooth>* _aidl_return) {
+ *_aidl_return = nullptr;
+ LOG(DEBUG) << __func__ << ": returning null";
+ return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus ModuleUsb::getMasterMute(bool* _aidl_return __unused) {
+ LOG(DEBUG) << __func__ << ": is not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+ndk::ScopedAStatus ModuleUsb::setMasterMute(bool in_mute __unused) {
+ LOG(DEBUG) << __func__ << ": is not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+ndk::ScopedAStatus ModuleUsb::getMasterVolume(float* _aidl_return __unused) {
+ LOG(DEBUG) << __func__ << ": is not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+ndk::ScopedAStatus ModuleUsb::setMasterVolume(float in_volume __unused) {
+ LOG(DEBUG) << __func__ << ": is not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+ndk::ScopedAStatus ModuleUsb::getMicMute(bool* _aidl_return __unused) {
+ LOG(DEBUG) << __func__ << ": is not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+ndk::ScopedAStatus ModuleUsb::setMicMute(bool in_mute __unused) {
+ LOG(DEBUG) << __func__ << ": is not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+ndk::ScopedAStatus ModuleUsb::populateConnectedDevicePort(AudioPort* audioPort) {
+ if (audioPort->ext.getTag() != AudioPortExt::Tag::device) {
+ LOG(ERROR) << __func__ << ": port id " << audioPort->id << " is not a device port";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+ }
+ auto& devicePort = audioPort->ext.get<AudioPortExt::Tag::device>();
+ if (devicePort.device.type.connection != AudioDeviceDescription::CONNECTION_USB) {
+ LOG(ERROR) << __func__ << ": port id " << audioPort->id << " is not a usb device port";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+ }
+ if (devicePort.device.address.getTag() != AudioDeviceAddress::Tag::alsa) {
+ LOG(ERROR) << __func__ << ": port id " << audioPort->id << " is not using alsa address";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+ }
+ auto& alsaAddress = devicePort.device.address.get<AudioDeviceAddress::Tag::alsa>();
+ if (alsaAddress.size() != 2 || alsaAddress[0] < 0 || alsaAddress[1] < 0) {
+ LOG(ERROR) << __func__ << ": port id " << audioPort->id << " invalid alsa address";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+ }
+
+ const bool isInput = isUsbInputDeviceType(devicePort.device.type.type);
+ alsa_device_profile profile;
+ profile_init(&profile, isInput ? PCM_IN : PCM_OUT);
+ if (!profile_read_device_info(&profile)) {
+ return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+ }
+
+ std::vector<AudioChannelLayout> channels = populateChannelMasksFromProfile(&profile, isInput);
+ std::vector<int> sampleRates = populateSampleRatesFromProfile(&profile);
+
+ for (size_t i = 0; i < std::min(MAX_PROFILE_FORMATS, AUDIO_PORT_MAX_AUDIO_PROFILES) &&
+ profile.formats[i] != 0;
+ ++i) {
+ auto audioFormatDescription =
+ usb::legacy2aidl_pcm_format_AudioFormatDescription(profile.formats[i]);
+ if (audioFormatDescription.type == AudioFormatType::DEFAULT) {
+ LOG(WARNING) << __func__ << ": unknown pcm type=" << profile.formats[i];
+ continue;
+ }
+ AudioProfile audioProfile = {.format = audioFormatDescription,
+ .channelMasks = channels,
+ .sampleRates = sampleRates};
+ audioPort->profiles.push_back(std::move(audioProfile));
+ }
+
+ return ndk::ScopedAStatus::ok();
+}
+
+ndk::ScopedAStatus ModuleUsb::checkAudioPatchEndpointsMatch(
+ const std::vector<AudioPortConfig*>& sources, const std::vector<AudioPortConfig*>& sinks) {
+ for (const auto& source : sources) {
+ for (const auto& sink : sinks) {
+ if (source->sampleRate != sink->sampleRate ||
+ source->channelMask != sink->channelMask || source->format != sink->format) {
+ LOG(ERROR) << __func__
+ << ": mismatch port configuration, source=" << source->toString()
+ << ", sink=" << sink->toString();
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+ }
+ }
+ }
+ return ndk::ScopedAStatus::ok();
+}
+
+} // namespace aidl::android::hardware::audio::core
diff --git a/audio/aidl/default/usb/StreamUsb.cpp b/audio/aidl/default/usb/StreamUsb.cpp
new file mode 100644
index 0000000..22e36ac
--- /dev/null
+++ b/audio/aidl/default/usb/StreamUsb.cpp
@@ -0,0 +1,242 @@
+/*
+ * Copyright (C) 2023 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 "AHAL_StreamUsb"
+#include <android-base/logging.h>
+
+#include "UsbAlsaUtils.h"
+#include "core-impl/Module.h"
+#include "core-impl/StreamUsb.h"
+
+extern "C" {
+#include "alsa_device_profile.h"
+}
+
+using aidl::android::hardware::audio::common::SinkMetadata;
+using aidl::android::hardware::audio::common::SourceMetadata;
+using aidl::android::media::audio::common::AudioDevice;
+using aidl::android::media::audio::common::AudioDeviceAddress;
+using aidl::android::media::audio::common::AudioOffloadInfo;
+
+namespace aidl::android::hardware::audio::core {
+
+DriverUsb::DriverUsb(const StreamContext& context, bool isInput)
+ : mFrameSizeBytes(context.getFrameSize()), mIsInput(isInput) {
+ struct pcm_config config;
+ config.channels = usb::getChannelCountFromChannelMask(context.getChannelLayout(), isInput);
+ if (config.channels == 0) {
+ LOG(ERROR) << __func__ << ": invalid channel=" << context.getChannelLayout().toString();
+ return;
+ }
+ config.format = usb::aidl2legacy_AudioFormatDescription_pcm_format(context.getFormat());
+ if (config.format == PCM_FORMAT_INVALID) {
+ LOG(ERROR) << __func__ << ": invalid format=" << context.getFormat().toString();
+ return;
+ }
+ config.rate = context.getSampleRate();
+ if (config.rate == 0) {
+ LOG(ERROR) << __func__ << ": invalid sample rate=" << config.rate;
+ return;
+ }
+ mConfig = config;
+}
+
+::android::status_t DriverUsb::init() {
+ return mConfig.has_value() ? ::android::OK : ::android::NO_INIT;
+}
+
+::android::status_t DriverUsb::setConnectedDevices(
+ const std::vector<AudioDevice>& connectedDevices) {
+ if (mIsInput && connectedDevices.size() > 1) {
+ LOG(ERROR) << __func__ << ": wrong device size(" << connectedDevices.size()
+ << ") for input stream";
+ return ::android::BAD_VALUE;
+ }
+ for (const auto& connectedDevice : connectedDevices) {
+ if (connectedDevice.address.getTag() != AudioDeviceAddress::alsa) {
+ LOG(ERROR) << __func__ << ": bad device address" << connectedDevice.address.toString();
+ return ::android::BAD_VALUE;
+ }
+ }
+ std::lock_guard guard(mLock);
+ mAlsaDeviceProxies.clear();
+ mConnectedDevices.clear();
+ for (const auto& connectedDevice : connectedDevices) {
+ mConnectedDevices.push_back(connectedDevice.address);
+ }
+ return ::android::OK;
+}
+
+::android::status_t DriverUsb::drain(StreamDescriptor::DrainMode) {
+ usleep(1000);
+ return ::android::OK;
+}
+
+::android::status_t DriverUsb::flush() {
+ usleep(1000);
+ return ::android::OK;
+}
+
+::android::status_t DriverUsb::pause() {
+ usleep(1000);
+ return ::android::OK;
+}
+
+::android::status_t DriverUsb::transfer(void* buffer, size_t frameCount, size_t* actualFrameCount,
+ int32_t* latencyMs) {
+ if (!mConfig.has_value() || mConnectedDevices.empty()) {
+ return ::android::NO_INIT;
+ }
+ if (mIsStandby) {
+ if (::android::status_t status = exitStandby(); status != ::android::OK) {
+ return status;
+ }
+ }
+ std::vector<std::shared_ptr<alsa_device_proxy>> alsaDeviceProxies;
+ {
+ std::lock_guard guard(mLock);
+ alsaDeviceProxies = mAlsaDeviceProxies;
+ }
+ const size_t bytesToTransfer = frameCount * mFrameSizeBytes;
+ if (mIsInput) {
+ // For input case, only support single device.
+ proxy_read(alsaDeviceProxies[0].get(), buffer, bytesToTransfer);
+ } else {
+ for (auto& proxy : alsaDeviceProxies) {
+ proxy_write(proxy.get(), buffer, bytesToTransfer);
+ }
+ }
+ *actualFrameCount = frameCount;
+ *latencyMs = Module::kLatencyMs;
+ return ::android::OK;
+}
+
+::android::status_t DriverUsb::standby() {
+ if (!mIsStandby) {
+ std::lock_guard guard(mLock);
+ mAlsaDeviceProxies.clear();
+ mIsStandby = true;
+ }
+ return ::android::OK;
+}
+
+::android::status_t DriverUsb::exitStandby() {
+ std::vector<AudioDeviceAddress> connectedDevices;
+ {
+ std::lock_guard guard(mLock);
+ connectedDevices = mConnectedDevices;
+ }
+ std::vector<std::shared_ptr<alsa_device_proxy>> alsaDeviceProxies;
+ for (const auto& device : connectedDevices) {
+ alsa_device_profile profile;
+ profile.card = device.get<AudioDeviceAddress::alsa>()[0];
+ profile.device = device.get<AudioDeviceAddress::alsa>()[1];
+ if (!profile_read_device_info(&profile)) {
+ LOG(ERROR) << __func__
+ << ": unable to read device info, device address=" << device.toString();
+ return ::android::UNKNOWN_ERROR;
+ }
+
+ auto proxy = std::shared_ptr<alsa_device_proxy>(new alsa_device_proxy(),
+ [](alsa_device_proxy* proxy) {
+ proxy_close(proxy);
+ free(proxy);
+ });
+ // Always ask for alsa configure as required since the configuration should be supported
+ // by the connected device. That is guaranteed by `setAudioPortConfig` and
+ // `setAudioPatch`.
+ if (int err =
+ proxy_prepare(proxy.get(), &profile, &mConfig.value(), true /*is_bit_perfect*/);
+ err != 0) {
+ LOG(ERROR) << __func__ << ": fail to prepare for device address=" << device.toString()
+ << " error=" << err;
+ return ::android::UNKNOWN_ERROR;
+ }
+ alsaDeviceProxies.push_back(std::move(proxy));
+ }
+ {
+ std::lock_guard guard(mLock);
+ mAlsaDeviceProxies = alsaDeviceProxies;
+ }
+ mIsStandby = false;
+ return ::android::OK;
+}
+
+// static
+ndk::ScopedAStatus StreamInUsb::createInstance(const SinkMetadata& sinkMetadata,
+ StreamContext&& context,
+ const std::vector<MicrophoneInfo>& microphones,
+ std::shared_ptr<StreamIn>* result) {
+ std::shared_ptr<StreamIn> stream =
+ ndk::SharedRefBase::make<StreamInUsb>(sinkMetadata, std::move(context), microphones);
+ if (auto status = initInstance(stream); !status.isOk()) {
+ return status;
+ }
+ *result = std::move(stream);
+ return ndk::ScopedAStatus::ok();
+}
+
+StreamInUsb::StreamInUsb(const SinkMetadata& sinkMetadata, StreamContext&& context,
+ const std::vector<MicrophoneInfo>& microphones)
+ : StreamIn(
+ sinkMetadata, std::move(context),
+ [](const StreamContext& ctx) -> DriverInterface* {
+ return new DriverUsb(ctx, true /*isInput*/);
+ },
+ [](const StreamContext& ctx, DriverInterface* driver) -> StreamWorkerInterface* {
+ // The default worker implementation is used.
+ return new StreamInWorker(ctx, driver);
+ },
+ microphones) {}
+
+ndk::ScopedAStatus StreamInUsb::getActiveMicrophones(
+ std::vector<MicrophoneDynamicInfo>* _aidl_return __unused) {
+ LOG(DEBUG) << __func__ << ": not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+// static
+ndk::ScopedAStatus StreamOutUsb::createInstance(const SourceMetadata& sourceMetadata,
+ StreamContext&& context,
+ const std::optional<AudioOffloadInfo>& offloadInfo,
+ std::shared_ptr<StreamOut>* result) {
+ if (offloadInfo.has_value()) {
+ LOG(ERROR) << __func__ << ": offload is not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+ }
+ std::shared_ptr<StreamOut> stream =
+ ndk::SharedRefBase::make<StreamOutUsb>(sourceMetadata, std::move(context), offloadInfo);
+ if (auto status = initInstance(stream); !status.isOk()) {
+ return status;
+ }
+ *result = std::move(stream);
+ return ndk::ScopedAStatus::ok();
+}
+
+StreamOutUsb::StreamOutUsb(const SourceMetadata& sourceMetadata, StreamContext&& context,
+ const std::optional<AudioOffloadInfo>& offloadInfo)
+ : StreamOut(
+ sourceMetadata, std::move(context),
+ [](const StreamContext& ctx) -> DriverInterface* {
+ return new DriverUsb(ctx, false /*isInput*/);
+ },
+ [](const StreamContext& ctx, DriverInterface* driver) -> StreamWorkerInterface* {
+ // The default worker implementation is used.
+ return new StreamOutWorker(ctx, driver);
+ },
+ offloadInfo) {}
+
+} // namespace aidl::android::hardware::audio::core
\ No newline at end of file
diff --git a/audio/aidl/default/usb/UsbAlsaUtils.cpp b/audio/aidl/default/usb/UsbAlsaUtils.cpp
new file mode 100644
index 0000000..3c79e1d
--- /dev/null
+++ b/audio/aidl/default/usb/UsbAlsaUtils.cpp
@@ -0,0 +1,181 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+#include <map>
+#include <set>
+
+#include <Utils.h>
+#include <aidl/android/media/audio/common/AudioFormatType.h>
+#include <aidl/android/media/audio/common/PcmType.h>
+
+#include "UsbAlsaUtils.h"
+#include "core-impl/utils.h"
+
+using aidl::android::media::audio::common::AudioChannelLayout;
+using aidl::android::media::audio::common::AudioFormatDescription;
+using aidl::android::media::audio::common::AudioFormatType;
+using aidl::android::media::audio::common::PcmType;
+using android::hardware::audio::common::getChannelCount;
+
+namespace aidl::android::hardware::audio::core::usb {
+
+namespace {
+
+using AudioChannelCountToMaskMap = std::map<unsigned int, AudioChannelLayout>;
+using AudioFormatDescToPcmFormatMap = std::map<AudioFormatDescription, enum pcm_format>;
+using PcmFormatToAudioFormatDescMap = std::map<enum pcm_format, AudioFormatDescription>;
+
+static const AudioChannelLayout INVALID_CHANNEL_LAYOUT =
+ AudioChannelLayout::make<AudioChannelLayout::Tag::invalid>(0);
+
+#define DEFINE_CHANNEL_LAYOUT_MASK(n) \
+ AudioChannelLayout::make<AudioChannelLayout::Tag::layoutMask>(AudioChannelLayout::LAYOUT_##n)
+
+static const std::set<AudioChannelLayout> SUPPORTED_OUT_CHANNEL_LAYOUTS = {
+ DEFINE_CHANNEL_LAYOUT_MASK(MONO), DEFINE_CHANNEL_LAYOUT_MASK(STEREO),
+ DEFINE_CHANNEL_LAYOUT_MASK(2POINT1), DEFINE_CHANNEL_LAYOUT_MASK(QUAD),
+ DEFINE_CHANNEL_LAYOUT_MASK(PENTA), DEFINE_CHANNEL_LAYOUT_MASK(5POINT1),
+ DEFINE_CHANNEL_LAYOUT_MASK(6POINT1), DEFINE_CHANNEL_LAYOUT_MASK(7POINT1),
+ DEFINE_CHANNEL_LAYOUT_MASK(7POINT1POINT4), DEFINE_CHANNEL_LAYOUT_MASK(22POINT2),
+};
+
+static const std::set<AudioChannelLayout> SUPPORTED_IN_CHANNEL_LAYOUTS = {
+ DEFINE_CHANNEL_LAYOUT_MASK(MONO),
+ DEFINE_CHANNEL_LAYOUT_MASK(STEREO),
+};
+
+#define DEFINE_CHANNEL_INDEX_MASK(n) \
+ AudioChannelLayout::make<AudioChannelLayout::Tag::indexMask>(AudioChannelLayout::INDEX_MASK_##n)
+
+static const std::set<AudioChannelLayout> SUPPORTED_INDEX_CHANNEL_LAYOUTS = {
+ DEFINE_CHANNEL_INDEX_MASK(1), DEFINE_CHANNEL_INDEX_MASK(2), DEFINE_CHANNEL_INDEX_MASK(3),
+ DEFINE_CHANNEL_INDEX_MASK(4), DEFINE_CHANNEL_INDEX_MASK(5), DEFINE_CHANNEL_INDEX_MASK(6),
+ DEFINE_CHANNEL_INDEX_MASK(7), DEFINE_CHANNEL_INDEX_MASK(8), DEFINE_CHANNEL_INDEX_MASK(9),
+ DEFINE_CHANNEL_INDEX_MASK(10), DEFINE_CHANNEL_INDEX_MASK(11), DEFINE_CHANNEL_INDEX_MASK(12),
+ DEFINE_CHANNEL_INDEX_MASK(13), DEFINE_CHANNEL_INDEX_MASK(14), DEFINE_CHANNEL_INDEX_MASK(15),
+ DEFINE_CHANNEL_INDEX_MASK(16), DEFINE_CHANNEL_INDEX_MASK(17), DEFINE_CHANNEL_INDEX_MASK(18),
+ DEFINE_CHANNEL_INDEX_MASK(19), DEFINE_CHANNEL_INDEX_MASK(20), DEFINE_CHANNEL_INDEX_MASK(21),
+ DEFINE_CHANNEL_INDEX_MASK(22), DEFINE_CHANNEL_INDEX_MASK(23), DEFINE_CHANNEL_INDEX_MASK(24),
+};
+
+static AudioChannelCountToMaskMap make_ChannelCountToMaskMap(
+ const std::set<AudioChannelLayout>& channelMasks) {
+ AudioChannelCountToMaskMap channelMaskToCountMap;
+ for (const auto& channelMask : channelMasks) {
+ channelMaskToCountMap.emplace(getChannelCount(channelMask), channelMask);
+ }
+ return channelMaskToCountMap;
+}
+
+const AudioChannelCountToMaskMap& getSupportedChannelOutLayoutMap() {
+ static const AudioChannelCountToMaskMap outLayouts =
+ make_ChannelCountToMaskMap(SUPPORTED_OUT_CHANNEL_LAYOUTS);
+ return outLayouts;
+}
+
+const AudioChannelCountToMaskMap& getSupportedChannelInLayoutMap() {
+ static const AudioChannelCountToMaskMap inLayouts =
+ make_ChannelCountToMaskMap(SUPPORTED_IN_CHANNEL_LAYOUTS);
+ return inLayouts;
+}
+
+const AudioChannelCountToMaskMap& getSupportedChannelIndexLayoutMap() {
+ static const AudioChannelCountToMaskMap indexLayouts =
+ make_ChannelCountToMaskMap(SUPPORTED_INDEX_CHANNEL_LAYOUTS);
+ return indexLayouts;
+}
+
+AudioFormatDescription make_AudioFormatDescription(AudioFormatType type) {
+ AudioFormatDescription result;
+ result.type = type;
+ return result;
+}
+
+AudioFormatDescription make_AudioFormatDescription(PcmType pcm) {
+ auto result = make_AudioFormatDescription(AudioFormatType::PCM);
+ result.pcm = pcm;
+ return result;
+}
+
+const AudioFormatDescToPcmFormatMap& getAudioFormatDescriptorToPcmFormatMap() {
+ static const AudioFormatDescToPcmFormatMap formatDescToPcmFormatMap = {
+ {make_AudioFormatDescription(PcmType::UINT_8_BIT), PCM_FORMAT_S8},
+ {make_AudioFormatDescription(PcmType::INT_16_BIT), PCM_FORMAT_S16_LE},
+ {make_AudioFormatDescription(PcmType::INT_24_BIT), PCM_FORMAT_S24_LE},
+ {make_AudioFormatDescription(PcmType::FIXED_Q_8_24), PCM_FORMAT_S24_3LE},
+ {make_AudioFormatDescription(PcmType::INT_32_BIT), PCM_FORMAT_S32_LE},
+ {make_AudioFormatDescription(PcmType::FLOAT_32_BIT), PCM_FORMAT_FLOAT_LE},
+ };
+ return formatDescToPcmFormatMap;
+}
+
+static PcmFormatToAudioFormatDescMap make_PcmFormatToAudioFormatDescMap(
+ const AudioFormatDescToPcmFormatMap& formatDescToPcmFormatMap) {
+ PcmFormatToAudioFormatDescMap result;
+ for (const auto& formatPair : formatDescToPcmFormatMap) {
+ result.emplace(formatPair.second, formatPair.first);
+ }
+ return result;
+}
+
+const PcmFormatToAudioFormatDescMap& getPcmFormatToAudioFormatDescMap() {
+ static const PcmFormatToAudioFormatDescMap pcmFormatToFormatDescMap =
+ make_PcmFormatToAudioFormatDescMap(getAudioFormatDescriptorToPcmFormatMap());
+ return pcmFormatToFormatDescMap;
+}
+
+} // namespace
+
+AudioChannelLayout getChannelLayoutMaskFromChannelCount(unsigned int channelCount, int isInput) {
+ return findValueOrDefault(
+ isInput ? getSupportedChannelInLayoutMap() : getSupportedChannelOutLayoutMap(),
+ channelCount, INVALID_CHANNEL_LAYOUT);
+}
+
+AudioChannelLayout getChannelIndexMaskFromChannelCount(unsigned int channelCount) {
+ return findValueOrDefault(getSupportedChannelIndexLayoutMap(), channelCount,
+ INVALID_CHANNEL_LAYOUT);
+}
+
+unsigned int getChannelCountFromChannelMask(const AudioChannelLayout& channelMask, bool isInput) {
+ switch (channelMask.getTag()) {
+ case AudioChannelLayout::Tag::layoutMask: {
+ return findKeyOrDefault(
+ isInput ? getSupportedChannelInLayoutMap() : getSupportedChannelOutLayoutMap(),
+ (unsigned int)getChannelCount(channelMask), 0u /*defaultValue*/);
+ }
+ case AudioChannelLayout::Tag::indexMask: {
+ return findKeyOrDefault(getSupportedChannelIndexLayoutMap(),
+ (unsigned int)getChannelCount(channelMask),
+ 0u /*defaultValue*/);
+ }
+ case AudioChannelLayout::Tag::none:
+ case AudioChannelLayout::Tag::invalid:
+ case AudioChannelLayout::Tag::voiceMask:
+ default:
+ return 0;
+ }
+}
+
+AudioFormatDescription legacy2aidl_pcm_format_AudioFormatDescription(enum pcm_format legacy) {
+ return findValueOrDefault(getPcmFormatToAudioFormatDescMap(), legacy, AudioFormatDescription());
+}
+
+pcm_format aidl2legacy_AudioFormatDescription_pcm_format(const AudioFormatDescription& aidl) {
+ return findValueOrDefault(getAudioFormatDescriptorToPcmFormatMap(), aidl, PCM_FORMAT_INVALID);
+}
+
+} // namespace aidl::android::hardware::audio::core::usb
\ No newline at end of file
diff --git a/audio/aidl/default/usb/UsbAlsaUtils.h b/audio/aidl/default/usb/UsbAlsaUtils.h
new file mode 100644
index 0000000..2d2f0f4
--- /dev/null
+++ b/audio/aidl/default/usb/UsbAlsaUtils.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2023 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.
+ */
+
+#pragma once
+
+#include <aidl/android/media/audio/common/AudioChannelLayout.h>
+#include <aidl/android/media/audio/common/AudioFormatDescription.h>
+
+extern "C" {
+#include <tinyalsa/pcm.h>
+}
+
+namespace aidl::android::hardware::audio::core::usb {
+
+::aidl::android::media::audio::common::AudioChannelLayout getChannelLayoutMaskFromChannelCount(
+ unsigned int channelCount, int isInput);
+::aidl::android::media::audio::common::AudioChannelLayout getChannelIndexMaskFromChannelCount(
+ unsigned int channelCount);
+unsigned int getChannelCountFromChannelMask(
+ const ::aidl::android::media::audio::common::AudioChannelLayout& channelMask, bool isInput);
+::aidl::android::media::audio::common::AudioFormatDescription
+legacy2aidl_pcm_format_AudioFormatDescription(enum pcm_format legacy);
+pcm_format aidl2legacy_AudioFormatDescription_pcm_format(
+ const ::aidl::android::media::audio::common::AudioFormatDescription& aidl);
+
+} // namespace aidl::android::hardware::audio::core::usb
\ No newline at end of file