478ae5eb5a
- add the ability to set the vsync delivery rate, when the rate is set to N>1 (ie: receive every N vsync), SF process' is woken up for all of vsync, but clients only see the every N events. - add the concept of one-shot vsync events, with a call-back to request the next one. currently the call-back is a binder IPC. Change-Id: I09f71df0b0ba0d88ed997645e2e2497d553c9a1b
99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/Errors.h>
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#include <utils/RefBase.h>
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#include <utils/Timers.h>
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#include <binder/Parcel.h>
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#include <binder/IInterface.h>
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#include <gui/IDisplayEventConnection.h>
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#include <gui/BitTube.h>
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namespace android {
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// ----------------------------------------------------------------------------
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enum {
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GET_DATA_CHANNEL = IBinder::FIRST_CALL_TRANSACTION,
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SET_VSYNC_RATE,
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REQUEST_NEXT_VSYNC
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};
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class BpDisplayEventConnection : public BpInterface<IDisplayEventConnection>
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{
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public:
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BpDisplayEventConnection(const sp<IBinder>& impl)
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: BpInterface<IDisplayEventConnection>(impl)
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{
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}
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virtual sp<BitTube> getDataChannel() const
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{
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Parcel data, reply;
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data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
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remote()->transact(GET_DATA_CHANNEL, data, &reply);
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return new BitTube(reply);
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}
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virtual void setVsyncRate(uint32_t count) {
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Parcel data, reply;
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data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
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data.writeInt32(count);
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remote()->transact(SET_VSYNC_RATE, data, &reply);
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}
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virtual void requestNextVsync() {
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Parcel data, reply;
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data.writeInterfaceToken(IDisplayEventConnection::getInterfaceDescriptor());
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remote()->transact(REQUEST_NEXT_VSYNC, data, &reply, IBinder::FLAG_ONEWAY);
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}
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};
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IMPLEMENT_META_INTERFACE(DisplayEventConnection, "android.gui.DisplayEventConnection");
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// ----------------------------------------------------------------------------
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status_t BnDisplayEventConnection::onTransact(
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uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
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{
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switch(code) {
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case GET_DATA_CHANNEL: {
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CHECK_INTERFACE(IDisplayEventConnection, data, reply);
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sp<BitTube> channel(getDataChannel());
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channel->writeToParcel(reply);
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return NO_ERROR;
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} break;
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case SET_VSYNC_RATE: {
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CHECK_INTERFACE(IDisplayEventConnection, data, reply);
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setVsyncRate(data.readInt32());
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return NO_ERROR;
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} break;
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case REQUEST_NEXT_VSYNC: {
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CHECK_INTERFACE(IDisplayEventConnection, data, reply);
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requestNextVsync();
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return NO_ERROR;
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} break;
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}
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return BBinder::onTransact(code, data, reply, flags);
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}
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// ----------------------------------------------------------------------------
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}; // namespace android
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