IGraphicBufferProducer.cpp revision d06421fd37fbb7fd07002e6738fac3a223cb1a62 
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
44class BpGraphicBufferProducer : public BpInterface<IGraphicBufferProducer>
45{
46public:
47    BpGraphicBufferProducer(const sp<IBinder>& impl)
48        : BpInterface<IGraphicBufferProducer>(impl)
49    {
50    }
51
52    virtual status_t requestBuffer(int bufferIdx, sp<GraphicBuffer>* buf) {
53        Parcel data, reply;
54        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
55        data.writeInt32(bufferIdx);
56        status_t result =remote()->transact(REQUEST_BUFFER, data, &reply);
57        if (result != NO_ERROR) {
58            return result;
59        }
60        bool nonNull = reply.readInt32();
61        if (nonNull) {
62            *buf = new GraphicBuffer();
63            reply.read(**buf);
64        }
65        result = reply.readInt32();
66        return result;
67    }
68
69    virtual status_t setBufferCount(int bufferCount)
70    {
71        Parcel data, reply;
72        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
73        data.writeInt32(bufferCount);
74        status_t result =remote()->transact(SET_BUFFER_COUNT, data, &reply);
75        if (result != NO_ERROR) {
76            return result;
77        }
78        result = reply.readInt32();
79        return result;
80    }
81
82    virtual status_t dequeueBuffer(int *buf, sp<Fence>* fence, bool async,
83            uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
84        Parcel data, reply;
85        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
86        data.writeInt32(async);
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 nonNull = reply.readInt32();
97        if (nonNull) {
98            *fence = new Fence();
99            reply.read(**fence);
100        }
101        result = reply.readInt32();
102        return result;
103    }
104
105    virtual status_t queueBuffer(int buf,
106            const QueueBufferInput& input, QueueBufferOutput* output) {
107        Parcel data, reply;
108        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
109        data.writeInt32(buf);
110        data.write(input);
111        status_t result = remote()->transact(QUEUE_BUFFER, data, &reply);
112        if (result != NO_ERROR) {
113            return result;
114        }
115        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
116        result = reply.readInt32();
117        return result;
118    }
119
120    virtual void cancelBuffer(int buf, const sp<Fence>& fence) {
121        Parcel data, reply;
122        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
123        data.writeInt32(buf);
124        data.write(*fence.get());
125        remote()->transact(CANCEL_BUFFER, data, &reply);
126    }
127
128    virtual int query(int what, int* value) {
129        Parcel data, reply;
130        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
131        data.writeInt32(what);
132        status_t result = remote()->transact(QUERY, data, &reply);
133        if (result != NO_ERROR) {
134            return result;
135        }
136        value[0] = reply.readInt32();
137        result = reply.readInt32();
138        return result;
139    }
140
141    virtual status_t connect(const sp<IBinder>& token,
142            int api, bool producerControlledByApp, QueueBufferOutput* output) {
143        Parcel data, reply;
144        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
145        data.writeStrongBinder(token);
146        data.writeInt32(api);
147        data.writeInt32(producerControlledByApp);
148        status_t result = remote()->transact(CONNECT, data, &reply);
149        if (result != NO_ERROR) {
150            return result;
151        }
152        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
153        result = reply.readInt32();
154        return result;
155    }
156
157    virtual status_t disconnect(int api) {
158        Parcel data, reply;
159        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
160        data.writeInt32(api);
161        status_t result =remote()->transact(DISCONNECT, data, &reply);
162        if (result != NO_ERROR) {
163            return result;
164        }
165        result = reply.readInt32();
166        return result;
167    }
168};
169
170IMPLEMENT_META_INTERFACE(GraphicBufferProducer, "android.gui.IGraphicBufferProducer");
171
172// ----------------------------------------------------------------------
173
174status_t BnGraphicBufferProducer::onTransact(
175    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
176{
177    switch(code) {
178        case REQUEST_BUFFER: {
179            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
180            int bufferIdx   = data.readInt32();
181            sp<GraphicBuffer> buffer;
182            int result = requestBuffer(bufferIdx, &buffer);
183            reply->writeInt32(buffer != 0);
184            if (buffer != 0) {
185                reply->write(*buffer);
186            }
187            reply->writeInt32(result);
188            return NO_ERROR;
189        } break;
190        case SET_BUFFER_COUNT: {
191            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
192            int bufferCount = data.readInt32();
193            int result = setBufferCount(bufferCount);
194            reply->writeInt32(result);
195            return NO_ERROR;
196        } break;
197        case DEQUEUE_BUFFER: {
198            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
199            bool async      = data.readInt32();
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 = 0;
205            sp<Fence> fence;
206            int result = dequeueBuffer(&buf, &fence, async, w, h, format, usage);
207            reply->writeInt32(buf);
208            reply->writeInt32(fence != NULL);
209            if (fence != NULL) {
210                reply->write(*fence);
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            memset(output, 0, sizeof(QueueBufferOutput));
223            status_t result = queueBuffer(buf, input, output);
224            reply->writeInt32(result);
225            return NO_ERROR;
226        } break;
227        case CANCEL_BUFFER: {
228            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
229            int buf = data.readInt32();
230            sp<Fence> fence = new Fence();
231            data.read(*fence.get());
232            cancelBuffer(buf, fence);
233            return NO_ERROR;
234        } break;
235        case QUERY: {
236            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
237            int value = 0;
238            int what = data.readInt32();
239            int res = query(what, &value);
240            reply->writeInt32(value);
241            reply->writeInt32(res);
242            return NO_ERROR;
243        } break;
244        case CONNECT: {
245            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
246            sp<IBinder> token = data.readStrongBinder();
247            int api = data.readInt32();
248            bool producerControlledByApp = data.readInt32();
249            QueueBufferOutput* const output =
250                    reinterpret_cast<QueueBufferOutput *>(
251                            reply->writeInplace(sizeof(QueueBufferOutput)));
252            status_t res = connect(token, api, producerControlledByApp, output);
253            reply->writeInt32(res);
254            return NO_ERROR;
255        } break;
256        case DISCONNECT: {
257            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
258            int api = data.readInt32();
259            status_t res = disconnect(api);
260            reply->writeInt32(res);
261            return NO_ERROR;
262        } break;
263    }
264    return BBinder::onTransact(code, data, reply, flags);
265}
266
267// ----------------------------------------------------------------------------
268
269IGraphicBufferProducer::QueueBufferInput::QueueBufferInput(const Parcel& parcel) {
270    parcel.read(*this);
271}
272
273size_t IGraphicBufferProducer::QueueBufferInput::getFlattenedSize() const {
274    return sizeof(timestamp)
275         + sizeof(isAutoTimestamp)
276         + sizeof(crop)
277         + sizeof(scalingMode)
278         + sizeof(transform)
279         + sizeof(async)
280         + fence->getFlattenedSize();
281}
282
283size_t IGraphicBufferProducer::QueueBufferInput::getFdCount() const {
284    return fence->getFdCount();
285}
286
287status_t IGraphicBufferProducer::QueueBufferInput::flatten(
288        void*& buffer, size_t& size, int*& fds, size_t& count) const
289{
290    if (size < getFlattenedSize()) {
291        return NO_MEMORY;
292    }
293    FlattenableUtils::write(buffer, size, timestamp);
294    FlattenableUtils::write(buffer, size, isAutoTimestamp);
295    FlattenableUtils::write(buffer, size, crop);
296    FlattenableUtils::write(buffer, size, scalingMode);
297    FlattenableUtils::write(buffer, size, transform);
298    FlattenableUtils::write(buffer, size, async);
299    return fence->flatten(buffer, size, fds, count);
300}
301
302status_t IGraphicBufferProducer::QueueBufferInput::unflatten(
303        void const*& buffer, size_t& size, int const*& fds, size_t& count)
304{
305    size_t minNeeded =
306              sizeof(timestamp)
307            + sizeof(isAutoTimestamp)
308            + sizeof(crop)
309            + sizeof(scalingMode)
310            + sizeof(transform)
311            + sizeof(async);
312
313    if (size < minNeeded) {
314        return NO_MEMORY;
315    }
316
317    FlattenableUtils::read(buffer, size, timestamp);
318    FlattenableUtils::read(buffer, size, isAutoTimestamp);
319    FlattenableUtils::read(buffer, size, crop);
320    FlattenableUtils::read(buffer, size, scalingMode);
321    FlattenableUtils::read(buffer, size, transform);
322    FlattenableUtils::read(buffer, size, async);
323
324    fence = new Fence();
325    return fence->unflatten(buffer, size, fds, count);
326}
327
328}; // namespace android
329