IDisplayEventConnection.cpp revision d723bd7669b4fc88dc282d8bf8ba5ecb2849d22f 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdint.h>
18#include <sys/types.h>
19
20#include <utils/Errors.h>
21#include <utils/RefBase.h>
22#include <utils/Timers.h>
23
24#include <binder/Parcel.h>
25#include <binder/IInterface.h>
26
27#include <gui/IDisplayEventConnection.h>
28#include <gui/BitTube.h>
29
30namespace android {
31// ----------------------------------------------------------------------------
32
33enum {
34    GET_DATA_CHANNEL = IBinder::FIRST_CALL_TRANSACTION,
35    SET_VSYNC_RATE,
36    REQUEST_NEXT_VSYNC
37};
38
39class BpDisplayEventConnection : public BpInterface<IDisplayEventConnection>
40{
41public:
42    BpDisplayEventConnection(const sp<IBinder>& impl)
43        : BpInterface<IDisplayEventConnection>(impl)
44    {
45    }
46
47    virtual ~BpDisplayEventConnection();
48
49    virtual sp<BitTube> getDataChannel() const
50    {
51        Parcel data, reply;
52        data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
53        remote()->transact(GET_DATA_CHANNEL, data, &reply);
54        return new BitTube(reply);
55    }
56
57    virtual void setVsyncRate(uint32_t count) {
58        Parcel data, reply;
59        data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
60        data.writeUint32(count);
61        remote()->transact(SET_VSYNC_RATE, data, &reply);
62    }
63
64    virtual void requestNextVsync() {
65        Parcel data, reply;
66        data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
67        remote()->transact(REQUEST_NEXT_VSYNC, data, &reply, IBinder::FLAG_ONEWAY);
68    }
69};
70
71// Out-of-line virtual method definition to trigger vtable emission in this
72// translation unit (see clang warning -Wweak-vtables)
73BpDisplayEventConnection::~BpDisplayEventConnection() {}
74
75IMPLEMENT_META_INTERFACE(DisplayEventConnection, "android.gui.DisplayEventConnection");
76
77// ----------------------------------------------------------------------------
78
79status_t BnDisplayEventConnection::onTransact(
80    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
81{
82    switch(code) {
83        case GET_DATA_CHANNEL: {
84            CHECK_INTERFACE(IDisplayEventConnection, data, reply);
85            sp<BitTube> channel(getDataChannel());
86            channel->writeToParcel(reply);
87            return NO_ERROR;
88        }
89        case SET_VSYNC_RATE: {
90            CHECK_INTERFACE(IDisplayEventConnection, data, reply);
91            setVsyncRate(data.readUint32());
92            return NO_ERROR;
93        }
94        case REQUEST_NEXT_VSYNC: {
95            CHECK_INTERFACE(IDisplayEventConnection, data, reply);
96            requestNextVsync();
97            return NO_ERROR;
98        }
99    }
100    return BBinder::onTransact(code, data, reply, flags);
101}
102
103// ----------------------------------------------------------------------------
104}; // namespace android
105