APM: support querying of audio playback routing
Add support for querying the audio devices used for playback
routing for the given audio attributes.
Take into account registered dynamic policies but disregard
secondary output descriptors as they are used for playback
capture.
Bug: 144440677
Test: atest AudioServiceHostTest
Change-Id: I102c57b432b044dc6b0ead49e0a30d8e9094411d
diff --git a/media/libaudioclient/IAudioPolicyService.cpp b/media/libaudioclient/IAudioPolicyService.cpp
index b9e6e33..87802a1 100644
--- a/media/libaudioclient/IAudioPolicyService.cpp
+++ b/media/libaudioclient/IAudioPolicyService.cpp
@@ -109,6 +109,7 @@
SET_PREFERRED_DEVICE_FOR_PRODUCT_STRATEGY,
REMOVE_PREFERRED_DEVICE_FOR_PRODUCT_STRATEGY,
GET_PREFERRED_DEVICE_FOR_PRODUCT_STRATEGY,
+ GET_DEVICES_FOR_ATTRIBUTES,
};
#define MAX_ITEMS_PER_LIST 1024
@@ -1348,6 +1349,41 @@
}
return static_cast<status_t>(reply.readInt32());
}
+
+ virtual status_t getDevicesForAttributes(const AudioAttributes &aa,
+ AudioDeviceTypeAddrVector *devices) const
+ {
+ if (devices == nullptr) {
+ return BAD_VALUE;
+ }
+ Parcel data, reply;
+ data.writeInterfaceToken(IAudioPolicyService::getInterfaceDescriptor());
+ status_t status = aa.writeToParcel(&data);
+ if (status != NO_ERROR) {
+ return status;
+ }
+ status = remote()->transact(GET_DEVICES_FOR_ATTRIBUTES, data, &reply);
+ if (status != NO_ERROR) {
+ // transaction failed, return error
+ return status;
+ }
+ status = static_cast<status_t>(reply.readInt32());
+ if (status != NO_ERROR) {
+ // APM method call failed, return error
+ return status;
+ }
+
+ const size_t numberOfDevices = (size_t)reply.readInt32();
+ for (size_t i = 0; i < numberOfDevices; i++) {
+ AudioDeviceTypeAddr device;
+ if (device.readFromParcel((Parcel*)&reply) == NO_ERROR) {
+ devices->push_back(device);
+ } else {
+ return FAILED_TRANSACTION;
+ }
+ }
+ return NO_ERROR;
+ }
};
IMPLEMENT_META_INTERFACE(AudioPolicyService, "android.media.IAudioPolicyService");
@@ -1414,7 +1450,8 @@
case IS_CALL_SCREEN_MODE_SUPPORTED:
case SET_PREFERRED_DEVICE_FOR_PRODUCT_STRATEGY:
case REMOVE_PREFERRED_DEVICE_FOR_PRODUCT_STRATEGY:
- case GET_PREFERRED_DEVICE_FOR_PRODUCT_STRATEGY: {
+ case GET_PREFERRED_DEVICE_FOR_PRODUCT_STRATEGY:
+ case GET_DEVICES_FOR_ATTRIBUTES: {
if (!isServiceUid(IPCThreadState::self()->getCallingUid())) {
ALOGW("%s: transaction %d received from PID %d unauthorized UID %d",
__func__, code, IPCThreadState::self()->getCallingPid(),
@@ -2473,6 +2510,37 @@
return NO_ERROR;
}
+ case GET_DEVICES_FOR_ATTRIBUTES: {
+ CHECK_INTERFACE(IAudioPolicyService, data, reply);
+ AudioAttributes attributes;
+ status_t status = attributes.readFromParcel(&data);
+ if (status != NO_ERROR) {
+ return status;
+ }
+ AudioDeviceTypeAddrVector devices;
+ status = getDevicesForAttributes(attributes.getAttributes(), &devices);
+ // reply data formatted as:
+ // - (int32) method call result from APM
+ // - (int32) number of devices (n) if method call returned NO_ERROR
+ // - n AudioDeviceTypeAddr if method call returned NO_ERROR
+ reply->writeInt32(status);
+ if (status != NO_ERROR) {
+ return NO_ERROR;
+ }
+ status = reply->writeInt32(devices.size());
+ if (status != NO_ERROR) {
+ return status;
+ }
+ for (const auto& device : devices) {
+ status = device.writeToParcel(reply);
+ if (status != NO_ERROR) {
+ return status;
+ }
+ }
+
+ return NO_ERROR;
+ }
+
default:
return BBinder::onTransact(code, data, reply, flags);
}