audio: Provide a way for Module to specify nominal latency
The latency figure depends on the module implementation.
Instead of using a hardcoded value, each module should be
able to specify its own value. This value is then used
for calculating the minimum buffer size.
Set the nominal latency of the primary (CF) module to a high
value since the virtual device implementation fails CTS tests
if it attempts to pretend that it provides low latency.
Bug: 302132812
Test: atest CtsMediaAudioTestCases --test-filter=".*AudioTrackTest.*"
Test: atest CtsMediaAudioTestCases --test-filter=".*AudioRecordTest.*"
Change-Id: I8ce9f230378eea787c9b3c7ce3660c1e4e7bc895
diff --git a/audio/aidl/default/Stream.cpp b/audio/aidl/default/Stream.cpp
index f00e358..6595324 100644
--- a/audio/aidl/default/Stream.cpp
+++ b/audio/aidl/default/Stream.cpp
@@ -138,7 +138,7 @@
reply->status = STATUS_OK;
if (isConnected) {
reply->observable.frames = mContext->getFrameCount();
- reply->observable.timeNs = ::android::elapsedRealtimeNano();
+ reply->observable.timeNs = ::android::uptimeNanos();
if (auto status = mDriver->refinePosition(&reply->observable); status == ::android::OK) {
return;
}
@@ -315,7 +315,7 @@
const size_t frameSize = mContext->getFrameSize();
size_t actualFrameCount = 0;
bool fatal = false;
- int32_t latency = Module::kLatencyMs;
+ int32_t latency = mContext->getNominalLatencyMs();
if (isConnected) {
if (::android::status_t status = mDriver->transfer(mDataBuffer.get(), byteCount / frameSize,
&actualFrameCount, &latency);
@@ -581,7 +581,7 @@
const size_t readByteCount = dataMQ->availableToRead();
const size_t frameSize = mContext->getFrameSize();
bool fatal = false;
- int32_t latency = Module::kLatencyMs;
+ int32_t latency = mContext->getNominalLatencyMs();
if (bool success = readByteCount > 0 ? dataMQ->read(&mDataBuffer[0], readByteCount) : true) {
const bool isConnected = mIsConnected;
LOG(VERBOSE) << __func__ << ": reading of " << readByteCount << " bytes from data MQ"