commit 076e7c704b25c9352597652dc99b7c4a0175ca8a
author Eric Laurent <elaurent@google.com> Tue May 03 18:12:28 2022 +0200
committer Eric Laurent <elaurent@google.com> Fri Jul 01 17:09:38 2022 +0000
tree eced8793d43dabcf0be7e7a15a5e602f65de6cdd
parent 740ed10d7827b68ac244d442ba2124438b3318d4

AudioSystem: add APIs to control HAL stream latency mode

Add API to AudioSystem and AudioFlinger to discover and control
the latency modes supported by audio HAL streams

Bug: 218273231
Test: make
Change-Id: I84c2325301cc7a4cf058fa076d0645ede877b54f

services/audioflinger/AudioFlinger.cpp

diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index f7576f6..01ba2df 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -226,6 +226,9 @@
 BINDER_METHOD_ENTRY(getAAudioMixerBurstCount) \
 BINDER_METHOD_ENTRY(getAAudioHardwareBurstMinUsec) \
 BINDER_METHOD_ENTRY(setDeviceConnectedState) \
+BINDER_METHOD_ENTRY(setRequestedLatencyMode) \
+BINDER_METHOD_ENTRY(getSupportedLatencyModes) \
+
 
 // singleton for Binder Method Statistics for IAudioFlinger
 static auto& getIAudioFlingerStatistics() {
@@ -1583,6 +1586,24 @@
     return NO_ERROR;
 }
 
+status_t AudioFlinger::setRequestedLatencyMode(
+        audio_io_handle_t output, audio_latency_mode_t mode __unused) {
+    if (output == AUDIO_IO_HANDLE_NONE) {
+        return BAD_VALUE;
+    }
+    //TODO b/218273231: implement
+    return INVALID_OPERATION;
+}
+
+status_t AudioFlinger::getSupportedLatencyModes(audio_io_handle_t output,
+            std::vector<audio_latency_mode_t>* modes __unused) {
+    if (output == AUDIO_IO_HANDLE_NONE) {
+        return BAD_VALUE;
+    }
+    //TODO b/218273231: implement
+    return INVALID_OPERATION;
+}
+
 status_t AudioFlinger::setStreamMute(audio_stream_type_t stream, bool muted)
 {
     // check calling permissions
@@ -2082,6 +2103,21 @@
     }
 }
 
+void AudioFlinger::onSupportedLatencyModesChanged(
+        audio_io_handle_t output, const std::vector<audio_latency_mode_t>& modes) {
+    int32_t outputAidl = VALUE_OR_FATAL(legacy2aidl_audio_io_handle_t_int32_t(output));
+    std::vector<media::LatencyMode> modesAidl = VALUE_OR_FATAL(
+                convertContainer<std::vector<media::LatencyMode>>(modes,
+                        legacy2aidl_audio_latency_mode_t_LatencyMode));
+
+    Mutex::Autolock _l(mClientLock);
+    size_t size = mNotificationClients.size();
+    for (size_t i = 0; i < size; i++) {
+        mNotificationClients.valueAt(i)->audioFlingerClient()
+                ->onSupportedLatencyModesChanged(outputAidl, modesAidl);
+    }
+}
+
 // removeClient_l() must be called with AudioFlinger::mClientLock held
 void AudioFlinger::removeClient_l(pid_t pid)
 {
@@ -4476,6 +4512,8 @@
         case TransactionCode::SET_RECORD_SILENCED:
         case TransactionCode::AUDIO_POLICY_READY:
         case TransactionCode::SET_DEVICE_CONNECTED_STATE:
+        case TransactionCode::SET_REQUESTED_LATENCY_MODE:
+        case TransactionCode::GET_SUPPORTED_LATENCY_MODES:
             ALOGW("%s: transaction %d received from PID %d",
                   __func__, code, IPCThreadState::self()->getCallingPid());
             // return status only for non void methods