Upintegrate the common_time service from ics-aah.

Move the common_time service developed in the ics-aah branch back into
master.

The common_time service is a small service build to synchronize an
arbitrary timeline amongst peers on a local sub-net.  While running
and configured, the service will elect a master from the set of
available devices within the subnet, define a relationship between the
common_time timeline the local time timeline (provided by the local
time HAL), and then attempt to maintain synchronization between common
and local time by controlling the frequency of the local time clock
via the HAL, or by disciplining local time in the digital domain if
the local time HAL implementation does not support HW slewing.

On its own, the native common time service will do nothing until it is
configured.  The CommonTimeManagementService (running out of the
system server process) is responsible for implementing policy
regarding configuration and operation of the common_time service and
will be added in a subsequent CL.

Change-Id: I71292f9b9b1797665865689c4572c9d3a0552f64
Signed-off-by: John Grossman <johngro@google.com>

1 files changed, 432 insertions, 0 deletions

diff --git a/media/common_time/ICommonClock.cpp b/media/common_time/ICommonClock.cpp
new file mode 100644
index 0000000..28b43ac
--- /dev/null
+++ b/media/common_time/ICommonClock.cpp
@@ -0,0 +1,432 @@
+/*
+ * Copyright (C) 2012 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 <linux/socket.h>
+
+#include <common_time/ICommonClock.h>
+#include <binder/Parcel.h>
+
+#include "utils.h"
+
+namespace android {
+
+/***** ICommonClock *****/
+
+enum {
+    IS_COMMON_TIME_VALID = IBinder::FIRST_CALL_TRANSACTION,
+    COMMON_TIME_TO_LOCAL_TIME,
+    LOCAL_TIME_TO_COMMON_TIME,
+    GET_COMMON_TIME,
+    GET_COMMON_FREQ,
+    GET_LOCAL_TIME,
+    GET_LOCAL_FREQ,
+    GET_ESTIMATED_ERROR,
+    GET_TIMELINE_ID,
+    GET_STATE,
+    GET_MASTER_ADDRESS,
+    REGISTER_LISTENER,
+    UNREGISTER_LISTENER,
+};
+
+const String16 ICommonClock::kServiceName("common_time.clock");
+const uint64_t ICommonClock::kInvalidTimelineID = 0;
+const int32_t ICommonClock::kErrorEstimateUnknown = 0x7FFFFFFF;
+
+class BpCommonClock : public BpInterface<ICommonClock>
+{
+  public:
+    BpCommonClock(const sp<IBinder>& impl)
+        : BpInterface<ICommonClock>(impl) {}
+
+    virtual status_t isCommonTimeValid(bool* valid, uint32_t* timelineID) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        status_t status = remote()->transact(IS_COMMON_TIME_VALID,
+                                             data,
+                                             &reply);
+        if (status == OK) {
+            status = reply.readInt32();
+            if (status == OK) {
+                *valid = reply.readInt32();
+                *timelineID = reply.readInt32();
+            }
+        }
+        return status;
+    }
+
+    virtual status_t commonTimeToLocalTime(int64_t commonTime,
+            int64_t* localTime) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        data.writeInt64(commonTime);
+        status_t status = remote()->transact(COMMON_TIME_TO_LOCAL_TIME,
+                data, &reply);
+        if (status == OK) {
+            status = reply.readInt32();
+            if (status == OK) {
+                *localTime = reply.readInt64();
+            }
+        }
+        return status;
+    }
+
+    virtual status_t localTimeToCommonTime(int64_t localTime,
+            int64_t* commonTime) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        data.writeInt64(localTime);
+        status_t status = remote()->transact(LOCAL_TIME_TO_COMMON_TIME,
+                data, &reply);
+        if (status == OK) {
+            status = reply.readInt32();
+            if (status == OK) {
+                *commonTime = reply.readInt64();
+            }
+        }
+        return status;
+    }
+
+    virtual status_t getCommonTime(int64_t* commonTime) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        status_t status = remote()->transact(GET_COMMON_TIME, data, &reply);
+        if (status == OK) {
+            status = reply.readInt32();
+            if (status == OK) {
+                *commonTime = reply.readInt64();
+            }
+        }
+        return status;
+    }
+
+    virtual status_t getCommonFreq(uint64_t* freq) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        status_t status = remote()->transact(GET_COMMON_FREQ, data, &reply);
+        if (status == OK) {
+            status = reply.readInt32();
+            if (status == OK) {
+                *freq = reply.readInt64();
+            }
+        }
+        return status;
+    }
+
+    virtual status_t getLocalTime(int64_t* localTime) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        status_t status = remote()->transact(GET_LOCAL_TIME, data, &reply);
+        if (status == OK) {
+            status = reply.readInt32();
+            if (status == OK) {
+                *localTime = reply.readInt64();
+            }
+        }
+        return status;
+    }
+
+    virtual status_t getLocalFreq(uint64_t* freq) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        status_t status = remote()->transact(GET_LOCAL_FREQ, data, &reply);
+        if (status == OK) {
+            status = reply.readInt32();
+            if (status == OK) {
+                *freq = reply.readInt64();
+            }
+        }
+        return status;
+    }
+
+    virtual status_t getEstimatedError(int32_t* estimate) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        status_t status = remote()->transact(GET_ESTIMATED_ERROR, data, &reply);
+        if (status == OK) {
+            status = reply.readInt32();
+            if (status == OK) {
+                *estimate = reply.readInt32();
+            }
+        }
+        return status;
+    }
+
+    virtual status_t getTimelineID(uint64_t* id) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        status_t status = remote()->transact(GET_TIMELINE_ID, data, &reply);
+        if (status == OK) {
+            status = reply.readInt32();
+            if (status == OK) {
+                *id = static_cast<uint64_t>(reply.readInt64());
+            }
+        }
+        return status;
+    }
+
+    virtual status_t getState(State* state) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        status_t status = remote()->transact(GET_STATE, data, &reply);
+        if (status == OK) {
+            status = reply.readInt32();
+            if (status == OK) {
+                *state = static_cast<State>(reply.readInt32());
+            }
+        }
+        return status;
+    }
+
+    virtual status_t getMasterAddr(struct sockaddr_storage* addr) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        status_t status = remote()->transact(GET_MASTER_ADDRESS, data, &reply);
+        if (status == OK) {
+            status = reply.readInt32();
+            if (status == OK)
+                deserializeSockaddr(&reply, addr);
+        }
+        return status;
+    }
+
+    virtual status_t registerListener(
+            const sp<ICommonClockListener>& listener) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        data.writeStrongBinder(listener->asBinder());
+
+        status_t status = remote()->transact(REGISTER_LISTENER, data, &reply);
+
+        if (status == OK) {
+            status = reply.readInt32();
+        }
+
+        return status;
+    }
+
+    virtual status_t unregisterListener(
+            const sp<ICommonClockListener>& listener) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICommonClock::getInterfaceDescriptor());
+        data.writeStrongBinder(listener->asBinder());
+        status_t status = remote()->transact(UNREGISTER_LISTENER, data, &reply);
+
+        if (status == OK) {
+            status = reply.readInt32();
+        }
+
+        return status;
+    }
+};
+
+IMPLEMENT_META_INTERFACE(CommonClock, "android.os.ICommonClock");
+
+status_t BnCommonClock::onTransact(uint32_t code,
+                                   const Parcel& data,
+                                   Parcel* reply,
+                                   uint32_t flags) {
+    switch(code) {
+        case IS_COMMON_TIME_VALID: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            bool valid;
+            uint32_t timelineID;
+            status_t status = isCommonTimeValid(&valid, &timelineID);
+            reply->writeInt32(status);
+            if (status == OK) {
+                reply->writeInt32(valid);
+                reply->writeInt32(timelineID);
+            }
+            return OK;
+        } break;
+
+        case COMMON_TIME_TO_LOCAL_TIME: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            int64_t commonTime = data.readInt64();
+            int64_t localTime;
+            status_t status = commonTimeToLocalTime(commonTime, &localTime);
+            reply->writeInt32(status);
+            if (status == OK) {
+                reply->writeInt64(localTime);
+            }
+            return OK;
+        } break;
+
+        case LOCAL_TIME_TO_COMMON_TIME: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            int64_t localTime = data.readInt64();
+            int64_t commonTime;
+            status_t status = localTimeToCommonTime(localTime, &commonTime);
+            reply->writeInt32(status);
+            if (status == OK) {
+                reply->writeInt64(commonTime);
+            }
+            return OK;
+        } break;
+
+        case GET_COMMON_TIME: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            int64_t commonTime;
+            status_t status = getCommonTime(&commonTime);
+            reply->writeInt32(status);
+            if (status == OK) {
+                reply->writeInt64(commonTime);
+            }
+            return OK;
+        } break;
+
+        case GET_COMMON_FREQ: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            uint64_t freq;
+            status_t status = getCommonFreq(&freq);
+            reply->writeInt32(status);
+            if (status == OK) {
+                reply->writeInt64(freq);
+            }
+            return OK;
+        } break;
+
+        case GET_LOCAL_TIME: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            int64_t localTime;
+            status_t status = getLocalTime(&localTime);
+            reply->writeInt32(status);
+            if (status == OK) {
+                reply->writeInt64(localTime);
+            }
+            return OK;
+        } break;
+
+        case GET_LOCAL_FREQ: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            uint64_t freq;
+            status_t status = getLocalFreq(&freq);
+            reply->writeInt32(status);
+            if (status == OK) {
+                reply->writeInt64(freq);
+            }
+            return OK;
+        } break;
+
+        case GET_ESTIMATED_ERROR: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            int32_t error;
+            status_t status = getEstimatedError(&error);
+            reply->writeInt32(status);
+            if (status == OK) {
+                reply->writeInt32(error);
+            }
+            return OK;
+        } break;
+
+        case GET_TIMELINE_ID: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            uint64_t id;
+            status_t status = getTimelineID(&id);
+            reply->writeInt32(status);
+            if (status == OK) {
+                reply->writeInt64(static_cast<int64_t>(id));
+            }
+            return OK;
+        } break;
+
+        case GET_STATE: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            State state;
+            status_t status = getState(&state);
+            reply->writeInt32(status);
+            if (status == OK) {
+                reply->writeInt32(static_cast<int32_t>(state));
+            }
+            return OK;
+        } break;
+
+        case GET_MASTER_ADDRESS: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            struct sockaddr_storage addr;
+            status_t status = getMasterAddr(&addr);
+
+            if ((status == OK) && !canSerializeSockaddr(&addr)) {
+                status = UNKNOWN_ERROR;
+            }
+
+            reply->writeInt32(status);
+
+            if (status == OK) {
+                serializeSockaddr(reply, &addr);
+            }
+
+            return OK;
+        } break;
+
+        case REGISTER_LISTENER: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            sp<ICommonClockListener> listener =
+                interface_cast<ICommonClockListener>(data.readStrongBinder());
+            status_t status = registerListener(listener);
+            reply->writeInt32(status);
+            return OK;
+        } break;
+
+        case UNREGISTER_LISTENER: {
+            CHECK_INTERFACE(ICommonClock, data, reply);
+            sp<ICommonClockListener> listener =
+                interface_cast<ICommonClockListener>(data.readStrongBinder());
+            status_t status = unregisterListener(listener);
+            reply->writeInt32(status);
+            return OK;
+        } break;
+    }
+    return BBinder::onTransact(code, data, reply, flags);
+}
+
+/***** ICommonClockListener *****/
+
+enum {
+    ON_TIMELINE_CHANGED = IBinder::FIRST_CALL_TRANSACTION,
+};
+
+class BpCommonClockListener : public BpInterface<ICommonClockListener>
+{
+  public:
+    BpCommonClockListener(const sp<IBinder>& impl)
+        : BpInterface<ICommonClockListener>(impl) {}
+
+    virtual void onTimelineChanged(uint64_t timelineID) {
+        Parcel data, reply;
+        data.writeInterfaceToken(
+                ICommonClockListener::getInterfaceDescriptor());
+        data.writeInt64(timelineID);
+        remote()->transact(ON_TIMELINE_CHANGED, data, &reply);
+    }
+};
+
+IMPLEMENT_META_INTERFACE(CommonClockListener,
+                         "android.os.ICommonClockListener");
+
+status_t BnCommonClockListener::onTransact(
+        uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) {
+    switch(code) {
+        case ON_TIMELINE_CHANGED: {
+            CHECK_INTERFACE(ICommonClockListener, data, reply);
+            uint32_t timelineID = data.readInt64();
+            onTimelineChanged(timelineID);
+            return NO_ERROR;
+        } break;
+    }
+
+    return BBinder::onTransact(code, data, reply, flags);
+}
+
+}; // namespace android