Add sound trigger control by audio policy

Audio policy:
- Added active capture indication to sound trigger service:
recognition stops if concurrent capture is not supported.
- Added generation of reserved I/O handle and session ID for
utterance capture.

Sound trigger service
- Added sound model update callback handling.
- Added service state callback
- Simplified callback shared memory allocation.

Bug: 12378680.

Change-Id: Ib0292c2733e6df90fdae480633dd9953d0016ef1

3 files changed, 90 insertions, 0 deletions

diff --git a/soundtrigger/ISoundTriggerClient.cpp b/soundtrigger/ISoundTriggerClient.cpp
index 1d0c0ec..b0b4428 100644
--- a/soundtrigger/ISoundTriggerClient.cpp
+++ b/soundtrigger/ISoundTriggerClient.cpp
@@ -27,6 +27,8 @@ namespace android {
 
 enum {
     ON_RECOGNITION_EVENT = IBinder::FIRST_CALL_TRANSACTION,
+    ON_SOUNDMODEL_EVENT,
+    ON_SERVICE_STATE_CHANGE
 };
 
 class BpSoundTriggerClient: public BpInterface<ISoundTriggerClient>
@@ -47,6 +49,25 @@ public:
                            data,
                            &reply);
     }
+
+    virtual void onSoundModelEvent(const sp<IMemory>& eventMemory)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISoundTriggerClient::getInterfaceDescriptor());
+        data.writeStrongBinder(eventMemory->asBinder());
+        remote()->transact(ON_SOUNDMODEL_EVENT,
+                           data,
+                           &reply);
+    }
+    virtual void onServiceStateChange(const sp<IMemory>& eventMemory)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISoundTriggerClient::getInterfaceDescriptor());
+        data.writeStrongBinder(eventMemory->asBinder());
+        remote()->transact(ON_SERVICE_STATE_CHANGE,
+                           data,
+                           &reply);
+    }
 };
 
 IMPLEMENT_META_INTERFACE(SoundTriggerClient,
@@ -65,6 +86,20 @@ status_t BnSoundTriggerClient::onTransact(
             onRecognitionEvent(eventMemory);
             return NO_ERROR;
         } break;
+        case ON_SOUNDMODEL_EVENT: {
+            CHECK_INTERFACE(ISoundTriggerClient, data, reply);
+            sp<IMemory> eventMemory = interface_cast<IMemory>(
+                data.readStrongBinder());
+            onSoundModelEvent(eventMemory);
+            return NO_ERROR;
+        } break;
+        case ON_SERVICE_STATE_CHANGE: {
+            CHECK_INTERFACE(ISoundTriggerClient, data, reply);
+            sp<IMemory> eventMemory = interface_cast<IMemory>(
+                data.readStrongBinder());
+            onServiceStateChange(eventMemory);
+            return NO_ERROR;
+        } break;
         default:
             return BBinder::onTransact(code, data, reply, flags);
     }
diff --git a/soundtrigger/ISoundTriggerHwService.cpp b/soundtrigger/ISoundTriggerHwService.cpp
index c9a0c24..05728e9 100644
--- a/soundtrigger/ISoundTriggerHwService.cpp
+++ b/soundtrigger/ISoundTriggerHwService.cpp
@@ -37,6 +37,7 @@ namespace android {
 enum {
     LIST_MODULES = IBinder::FIRST_CALL_TRANSACTION,
     ATTACH,
+    SET_CAPTURE_STATE,
 };
 
 class BpSoundTriggerHwService: public BpInterface<ISoundTriggerHwService>
@@ -90,6 +91,18 @@ public:
         return status;
     }
 
+    virtual status_t setCaptureState(bool active)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISoundTriggerHwService::getInterfaceDescriptor());
+        data.writeInt32(active);
+        status_t status = remote()->transact(SET_CAPTURE_STATE, data, &reply);
+        if (status == NO_ERROR) {
+            status = reply.readInt32();
+        }
+        return status;
+    }
+
 };
 
 IMPLEMENT_META_INTERFACE(SoundTriggerHwService, "android.hardware.ISoundTriggerHwService");
@@ -140,6 +153,13 @@ status_t BnSoundTriggerHwService::onTransact(
             }
             return NO_ERROR;
         } break;
+
+        case SET_CAPTURE_STATE: {
+            CHECK_INTERFACE(ISoundTriggerHwService, data, reply);
+            reply->writeInt32(setCaptureState((bool)data.readInt32()));
+            return NO_ERROR;
+        } break;
+
         default:
             return BBinder::onTransact(code, data, reply, flags);
     }
diff --git a/soundtrigger/SoundTrigger.cpp b/soundtrigger/SoundTrigger.cpp
index e43acd0..0015c30 100644
--- a/soundtrigger/SoundTrigger.cpp
+++ b/soundtrigger/SoundTrigger.cpp
@@ -113,6 +113,16 @@ sp<SoundTrigger> SoundTrigger::attach(const sound_trigger_module_handle_t module
 }
 
 
+status_t SoundTrigger::setCaptureState(bool active)
+{
+    ALOGV("setCaptureState(%d)", active);
+    const sp<ISoundTriggerHwService>& service = getSoundTriggerHwService();
+    if (service == 0) {
+        return NO_INIT;
+    }
+    return service->setCaptureState(active);
+}
+
 // SoundTrigger
 SoundTrigger::SoundTrigger(sound_trigger_module_handle_t module,
                                  const sp<SoundTriggerCallback>& callback)
@@ -192,6 +202,31 @@ void SoundTrigger::onRecognitionEvent(const sp<IMemory>& eventMemory)
     }
 }
 
+void SoundTrigger::onSoundModelEvent(const sp<IMemory>& eventMemory)
+{
+    Mutex::Autolock _l(mLock);
+    if (eventMemory == 0 || eventMemory->pointer() == NULL) {
+        return;
+    }
+
+    if (mCallback != 0) {
+        mCallback->onSoundModelEvent(
+                (struct sound_trigger_model_event *)eventMemory->pointer());
+    }
+}
+
+void SoundTrigger::onServiceStateChange(const sp<IMemory>& eventMemory)
+{
+    Mutex::Autolock _l(mLock);
+    if (eventMemory == 0 || eventMemory->pointer() == NULL) {
+        return;
+    }
+
+    if (mCallback != 0) {
+        mCallback->onServiceStateChange(
+                *((sound_trigger_service_state_t *)eventMemory->pointer()));
+    }
+}
 
 //IBinder::DeathRecipient
 void SoundTrigger::binderDied(const wp<IBinder>& who __unused) {