7cdd786fa8
we can now queue/dequeue a buffer in asynchrnous mode by using the async parameter to these calls. async mode is only specified with those calls (it is not modal anymore). as a consequence it can only be specified when the buffer count is not overidden, as error is returned otherwise. Change-Id: Ic63f4f96f671cb9d65c4cecbcc192615e09a8b6b
318 lines
11 KiB
C++
318 lines
11 KiB
C++
/*
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* Copyright (C) 2010 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/Vector.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/IGraphicBufferProducer.h>
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namespace android {
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// ----------------------------------------------------------------------------
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enum {
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REQUEST_BUFFER = IBinder::FIRST_CALL_TRANSACTION,
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SET_BUFFER_COUNT,
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DEQUEUE_BUFFER,
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QUEUE_BUFFER,
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CANCEL_BUFFER,
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QUERY,
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CONNECT,
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DISCONNECT,
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};
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class BpGraphicBufferProducer : public BpInterface<IGraphicBufferProducer>
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{
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public:
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BpGraphicBufferProducer(const sp<IBinder>& impl)
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: BpInterface<IGraphicBufferProducer>(impl)
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{
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}
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virtual status_t requestBuffer(int bufferIdx, sp<GraphicBuffer>* buf) {
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Parcel data, reply;
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data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
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data.writeInt32(bufferIdx);
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status_t result =remote()->transact(REQUEST_BUFFER, data, &reply);
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if (result != NO_ERROR) {
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return result;
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}
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bool nonNull = reply.readInt32();
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if (nonNull) {
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*buf = new GraphicBuffer();
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reply.read(**buf);
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}
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result = reply.readInt32();
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return result;
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}
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virtual status_t setBufferCount(int bufferCount)
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{
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Parcel data, reply;
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data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
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data.writeInt32(bufferCount);
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status_t result =remote()->transact(SET_BUFFER_COUNT, data, &reply);
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if (result != NO_ERROR) {
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return result;
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}
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result = reply.readInt32();
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return result;
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}
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virtual status_t dequeueBuffer(int *buf, sp<Fence>* fence, bool async,
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uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
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Parcel data, reply;
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data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
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data.writeInt32(async);
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data.writeInt32(w);
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data.writeInt32(h);
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data.writeInt32(format);
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data.writeInt32(usage);
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status_t result = remote()->transact(DEQUEUE_BUFFER, data, &reply);
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if (result != NO_ERROR) {
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return result;
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}
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*buf = reply.readInt32();
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bool fenceWasWritten = reply.readInt32();
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if (fenceWasWritten) {
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// If the fence was written by the callee, then overwrite the
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// caller's fence here. If it wasn't written then don't touch the
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// caller's fence.
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*fence = new Fence();
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reply.read(*(fence->get()));
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}
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result = reply.readInt32();
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return result;
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}
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virtual status_t queueBuffer(int buf,
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const QueueBufferInput& input, QueueBufferOutput* output) {
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Parcel data, reply;
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data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
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data.writeInt32(buf);
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data.write(input);
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status_t result = remote()->transact(QUEUE_BUFFER, data, &reply);
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if (result != NO_ERROR) {
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return result;
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}
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memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
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result = reply.readInt32();
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return result;
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}
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virtual void cancelBuffer(int buf, const sp<Fence>& fence) {
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Parcel data, reply;
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data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
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data.writeInt32(buf);
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data.write(*fence.get());
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remote()->transact(CANCEL_BUFFER, data, &reply);
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}
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virtual int query(int what, int* value) {
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Parcel data, reply;
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data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
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data.writeInt32(what);
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status_t result = remote()->transact(QUERY, data, &reply);
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if (result != NO_ERROR) {
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return result;
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}
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value[0] = reply.readInt32();
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result = reply.readInt32();
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return result;
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}
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virtual status_t connect(int api, bool producerControlledByApp, QueueBufferOutput* output) {
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Parcel data, reply;
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data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
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data.writeInt32(api);
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data.writeInt32(producerControlledByApp);
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status_t result = remote()->transact(CONNECT, data, &reply);
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if (result != NO_ERROR) {
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return result;
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}
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memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
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result = reply.readInt32();
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return result;
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}
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virtual status_t disconnect(int api) {
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Parcel data, reply;
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data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
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data.writeInt32(api);
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status_t result =remote()->transact(DISCONNECT, data, &reply);
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if (result != NO_ERROR) {
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return result;
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}
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result = reply.readInt32();
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return result;
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}
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};
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IMPLEMENT_META_INTERFACE(GraphicBufferProducer, "android.gui.IGraphicBufferProducer");
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// ----------------------------------------------------------------------
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status_t BnGraphicBufferProducer::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 REQUEST_BUFFER: {
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CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
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int bufferIdx = data.readInt32();
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sp<GraphicBuffer> buffer;
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int result = requestBuffer(bufferIdx, &buffer);
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reply->writeInt32(buffer != 0);
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if (buffer != 0) {
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reply->write(*buffer);
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}
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reply->writeInt32(result);
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return NO_ERROR;
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} break;
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case SET_BUFFER_COUNT: {
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CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
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int bufferCount = data.readInt32();
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int result = setBufferCount(bufferCount);
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reply->writeInt32(result);
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return NO_ERROR;
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} break;
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case DEQUEUE_BUFFER: {
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CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
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bool async = data.readInt32();
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uint32_t w = data.readInt32();
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uint32_t h = data.readInt32();
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uint32_t format = data.readInt32();
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uint32_t usage = data.readInt32();
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int buf;
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sp<Fence> fence;
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int result = dequeueBuffer(&buf, &fence, async, w, h, format, usage);
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reply->writeInt32(buf);
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reply->writeInt32(fence != NULL);
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if (fence != NULL) {
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reply->write(*fence.get());
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}
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reply->writeInt32(result);
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return NO_ERROR;
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} break;
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case QUEUE_BUFFER: {
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CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
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int buf = data.readInt32();
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QueueBufferInput input(data);
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QueueBufferOutput* const output =
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reinterpret_cast<QueueBufferOutput *>(
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reply->writeInplace(sizeof(QueueBufferOutput)));
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status_t result = queueBuffer(buf, input, output);
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reply->writeInt32(result);
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return NO_ERROR;
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} break;
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case CANCEL_BUFFER: {
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CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
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int buf = data.readInt32();
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sp<Fence> fence = new Fence();
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data.read(*fence.get());
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cancelBuffer(buf, fence);
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return NO_ERROR;
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} break;
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case QUERY: {
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CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
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int value;
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int what = data.readInt32();
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int res = query(what, &value);
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reply->writeInt32(value);
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reply->writeInt32(res);
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return NO_ERROR;
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} break;
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case CONNECT: {
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CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
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int api = data.readInt32();
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bool producerControlledByApp = data.readInt32();
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QueueBufferOutput* const output =
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reinterpret_cast<QueueBufferOutput *>(
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reply->writeInplace(sizeof(QueueBufferOutput)));
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status_t res = connect(api, producerControlledByApp, output);
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reply->writeInt32(res);
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return NO_ERROR;
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} break;
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case DISCONNECT: {
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CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
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int api = data.readInt32();
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status_t res = disconnect(api);
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reply->writeInt32(res);
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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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IGraphicBufferProducer::QueueBufferInput::QueueBufferInput(const Parcel& parcel) {
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parcel.read(*this);
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}
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size_t IGraphicBufferProducer::QueueBufferInput::getFlattenedSize() const
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{
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return sizeof(timestamp)
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+ sizeof(crop)
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+ sizeof(scalingMode)
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+ sizeof(transform)
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+ sizeof(async)
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+ fence->getFlattenedSize();
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}
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size_t IGraphicBufferProducer::QueueBufferInput::getFdCount() const
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{
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return fence->getFdCount();
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}
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status_t IGraphicBufferProducer::QueueBufferInput::flatten(void* buffer, size_t size,
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int fds[], size_t count) const
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{
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status_t err = NO_ERROR;
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char* p = (char*)buffer;
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memcpy(p, ×tamp, sizeof(timestamp)); p += sizeof(timestamp);
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memcpy(p, &crop, sizeof(crop)); p += sizeof(crop);
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memcpy(p, &scalingMode, sizeof(scalingMode)); p += sizeof(scalingMode);
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memcpy(p, &transform, sizeof(transform)); p += sizeof(transform);
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memcpy(p, &async, sizeof(async)); p += sizeof(async);
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err = fence->flatten(p, size - (p - (char*)buffer), fds, count);
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return err;
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}
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status_t IGraphicBufferProducer::QueueBufferInput::unflatten(void const* buffer,
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size_t size, int fds[], size_t count)
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{
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status_t err = NO_ERROR;
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const char* p = (const char*)buffer;
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memcpy(×tamp, p, sizeof(timestamp)); p += sizeof(timestamp);
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memcpy(&crop, p, sizeof(crop)); p += sizeof(crop);
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memcpy(&scalingMode, p, sizeof(scalingMode)); p += sizeof(scalingMode);
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memcpy(&transform, p, sizeof(transform)); p += sizeof(transform);
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memcpy(&async, p, sizeof(async)); p += sizeof(async);
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fence = new Fence();
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err = fence->unflatten(p, size - (p - (const char*)buffer), fds, count);
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return err;
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}
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}; // namespace android
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