IGraphicBufferProducer.cpp revision 595264f1af12e25dce57d7c5b1d52ed86ac0d0c9 
1/*
2 * Copyright (C) 2010 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/Vector.h>
23#include <utils/Timers.h>
24
25#include <binder/Parcel.h>
26#include <binder/IInterface.h>
27
28#include <gui/IGraphicBufferProducer.h>
29
30namespace android {
31// ----------------------------------------------------------------------------
32
33enum {
34    REQUEST_BUFFER = IBinder::FIRST_CALL_TRANSACTION,
35    SET_BUFFER_COUNT,
36    DEQUEUE_BUFFER,
37    QUEUE_BUFFER,
38    CANCEL_BUFFER,
39    QUERY,
40    CONNECT,
41    DISCONNECT,
42};
43
44
45class BpGraphicBufferProducer : public BpInterface<IGraphicBufferProducer>
46{
47public:
48    BpGraphicBufferProducer(const sp<IBinder>& impl)
49        : BpInterface<IGraphicBufferProducer>(impl)
50    {
51    }
52
53    virtual status_t requestBuffer(int bufferIdx, sp<GraphicBuffer>* buf) {
54        Parcel data, reply;
55        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
56        data.writeInt32(bufferIdx);
57        status_t result =remote()->transact(REQUEST_BUFFER, data, &reply);
58        if (result != NO_ERROR) {
59            return result;
60        }
61        bool nonNull = reply.readInt32();
62        if (nonNull) {
63            *buf = new GraphicBuffer();
64            reply.read(**buf);
65        }
66        result = reply.readInt32();
67        return result;
68    }
69
70    virtual status_t setBufferCount(int bufferCount)
71    {
72        Parcel data, reply;
73        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
74        data.writeInt32(bufferCount);
75        status_t result =remote()->transact(SET_BUFFER_COUNT, data, &reply);
76        if (result != NO_ERROR) {
77            return result;
78        }
79        result = reply.readInt32();
80        return result;
81    }
82
83    virtual status_t dequeueBuffer(int *buf, sp<Fence>* fence,
84            uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
85        Parcel data, reply;
86        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
87        data.writeInt32(w);
88        data.writeInt32(h);
89        data.writeInt32(format);
90        data.writeInt32(usage);
91        status_t result = remote()->transact(DEQUEUE_BUFFER, data, &reply);
92        if (result != NO_ERROR) {
93            return result;
94        }
95        *buf = reply.readInt32();
96        bool fenceWasWritten = reply.readInt32();
97        if (fenceWasWritten) {
98            // If the fence was written by the callee, then overwrite the
99            // caller's fence here.  If it wasn't written then don't touch the
100            // caller's fence.
101            *fence = new Fence();
102            reply.read(*(fence->get()));
103        }
104        result = reply.readInt32();
105        return result;
106    }
107
108    virtual status_t queueBuffer(int buf,
109            const QueueBufferInput& input, QueueBufferOutput* output) {
110        Parcel data, reply;
111        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
112        data.writeInt32(buf);
113        data.write(input);
114        status_t result = remote()->transact(QUEUE_BUFFER, data, &reply);
115        if (result != NO_ERROR) {
116            return result;
117        }
118        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
119        result = reply.readInt32();
120        return result;
121    }
122
123    virtual void cancelBuffer(int buf, const sp<Fence>& fence) {
124        Parcel data, reply;
125        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
126        data.writeInt32(buf);
127        data.write(*fence.get());
128        remote()->transact(CANCEL_BUFFER, data, &reply);
129    }
130
131    virtual int query(int what, int* value) {
132        Parcel data, reply;
133        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
134        data.writeInt32(what);
135        status_t result = remote()->transact(QUERY, data, &reply);
136        if (result != NO_ERROR) {
137            return result;
138        }
139        value[0] = reply.readInt32();
140        result = reply.readInt32();
141        return result;
142    }
143
144    virtual status_t connect(int api, bool producerControlledByApp, QueueBufferOutput* output) {
145        Parcel data, reply;
146        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
147        data.writeInt32(api);
148        data.writeInt32(producerControlledByApp);
149        status_t result = remote()->transact(CONNECT, data, &reply);
150        if (result != NO_ERROR) {
151            return result;
152        }
153        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
154        result = reply.readInt32();
155        return result;
156    }
157
158    virtual status_t disconnect(int api) {
159        Parcel data, reply;
160        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
161        data.writeInt32(api);
162        status_t result =remote()->transact(DISCONNECT, data, &reply);
163        if (result != NO_ERROR) {
164            return result;
165        }
166        result = reply.readInt32();
167        return result;
168    }
169};
170
171IMPLEMENT_META_INTERFACE(GraphicBufferProducer, "android.gui.IGraphicBufferProducer");
172
173// ----------------------------------------------------------------------
174
175status_t BnGraphicBufferProducer::onTransact(
176    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
177{
178    switch(code) {
179        case REQUEST_BUFFER: {
180            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
181            int bufferIdx   = data.readInt32();
182            sp<GraphicBuffer> buffer;
183            int result = requestBuffer(bufferIdx, &buffer);
184            reply->writeInt32(buffer != 0);
185            if (buffer != 0) {
186                reply->write(*buffer);
187            }
188            reply->writeInt32(result);
189            return NO_ERROR;
190        } break;
191        case SET_BUFFER_COUNT: {
192            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
193            int bufferCount = data.readInt32();
194            int result = setBufferCount(bufferCount);
195            reply->writeInt32(result);
196            return NO_ERROR;
197        } break;
198        case DEQUEUE_BUFFER: {
199            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
200            uint32_t w      = data.readInt32();
201            uint32_t h      = data.readInt32();
202            uint32_t format = data.readInt32();
203            uint32_t usage  = data.readInt32();
204            int buf;
205            sp<Fence> fence;
206            int result = dequeueBuffer(&buf, &fence, w, h, format, usage);
207            reply->writeInt32(buf);
208            reply->writeInt32(fence != NULL);
209            if (fence != NULL) {
210                reply->write(*fence.get());
211            }
212            reply->writeInt32(result);
213            return NO_ERROR;
214        } break;
215        case QUEUE_BUFFER: {
216            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
217            int buf = data.readInt32();
218            QueueBufferInput input(data);
219            QueueBufferOutput* const output =
220                    reinterpret_cast<QueueBufferOutput *>(
221                            reply->writeInplace(sizeof(QueueBufferOutput)));
222            status_t result = queueBuffer(buf, input, output);
223            reply->writeInt32(result);
224            return NO_ERROR;
225        } break;
226        case CANCEL_BUFFER: {
227            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
228            int buf = data.readInt32();
229            sp<Fence> fence = new Fence();
230            data.read(*fence.get());
231            cancelBuffer(buf, fence);
232            return NO_ERROR;
233        } break;
234        case QUERY: {
235            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
236            int value;
237            int what = data.readInt32();
238            int res = query(what, &value);
239            reply->writeInt32(value);
240            reply->writeInt32(res);
241            return NO_ERROR;
242        } break;
243        case CONNECT: {
244            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
245            int api = data.readInt32();
246            bool producerControlledByApp = data.readInt32();
247            QueueBufferOutput* const output =
248                    reinterpret_cast<QueueBufferOutput *>(
249                            reply->writeInplace(sizeof(QueueBufferOutput)));
250            status_t res = connect(api, producerControlledByApp, output);
251            reply->writeInt32(res);
252            return NO_ERROR;
253        } break;
254        case DISCONNECT: {
255            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
256            int api = data.readInt32();
257            status_t res = disconnect(api);
258            reply->writeInt32(res);
259            return NO_ERROR;
260        } break;
261    }
262    return BBinder::onTransact(code, data, reply, flags);
263}
264
265// ----------------------------------------------------------------------------
266
267IGraphicBufferProducer::QueueBufferInput::QueueBufferInput(const Parcel& parcel) {
268    parcel.read(*this);
269}
270
271size_t IGraphicBufferProducer::QueueBufferInput::getFlattenedSize() const
272{
273    return sizeof(timestamp)
274         + sizeof(crop)
275         + sizeof(scalingMode)
276         + sizeof(transform)
277         + fence->getFlattenedSize();
278}
279
280size_t IGraphicBufferProducer::QueueBufferInput::getFdCount() const
281{
282    return fence->getFdCount();
283}
284
285status_t IGraphicBufferProducer::QueueBufferInput::flatten(void* buffer, size_t size,
286        int fds[], size_t count) const
287{
288    status_t err = NO_ERROR;
289    char* p = (char*)buffer;
290    memcpy(p, &timestamp,   sizeof(timestamp));   p += sizeof(timestamp);
291    memcpy(p, &crop,        sizeof(crop));        p += sizeof(crop);
292    memcpy(p, &scalingMode, sizeof(scalingMode)); p += sizeof(scalingMode);
293    memcpy(p, &transform,   sizeof(transform));   p += sizeof(transform);
294    err = fence->flatten(p, size - (p - (char*)buffer), fds, count);
295    return err;
296}
297
298status_t IGraphicBufferProducer::QueueBufferInput::unflatten(void const* buffer,
299        size_t size, int fds[], size_t count)
300{
301    status_t err = NO_ERROR;
302    const char* p = (const char*)buffer;
303    memcpy(&timestamp,   p, sizeof(timestamp));   p += sizeof(timestamp);
304    memcpy(&crop,        p, sizeof(crop));        p += sizeof(crop);
305    memcpy(&scalingMode, p, sizeof(scalingMode)); p += sizeof(scalingMode);
306    memcpy(&transform,   p, sizeof(transform));   p += sizeof(transform);
307    fence = new Fence();
308    err = fence->unflatten(p, size - (p - (const char*)buffer), fds, count);
309    return err;
310}
311
312}; // namespace android
313