IGraphicBufferProducer.cpp revision 399184a4cd728ea1421fb0bc1722274a29e38f4a 
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/NativeHandle.h>
22#include <utils/RefBase.h>
23#include <utils/Timers.h>
24#include <utils/Vector.h>
25
26#include <binder/Parcel.h>
27#include <binder/IInterface.h>
28
29#include <gui/IGraphicBufferProducer.h>
30
31namespace android {
32// ----------------------------------------------------------------------------
33
34enum {
35    REQUEST_BUFFER = IBinder::FIRST_CALL_TRANSACTION,
36    SET_BUFFER_COUNT,
37    DEQUEUE_BUFFER,
38    QUEUE_BUFFER,
39    CANCEL_BUFFER,
40    QUERY,
41    CONNECT,
42    DISCONNECT,
43    SET_SIDEBAND_STREAM,
44};
45
46class BpGraphicBufferProducer : public BpInterface<IGraphicBufferProducer>
47{
48public:
49    BpGraphicBufferProducer(const sp<IBinder>& impl)
50        : BpInterface<IGraphicBufferProducer>(impl)
51    {
52    }
53
54    virtual status_t requestBuffer(int bufferIdx, sp<GraphicBuffer>* buf) {
55        Parcel data, reply;
56        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
57        data.writeInt32(bufferIdx);
58        status_t result =remote()->transact(REQUEST_BUFFER, data, &reply);
59        if (result != NO_ERROR) {
60            return result;
61        }
62        bool nonNull = reply.readInt32();
63        if (nonNull) {
64            *buf = new GraphicBuffer();
65            result = reply.read(**buf);
66            if(result != NO_ERROR) {
67                (*buf).clear();
68                return result;
69            }
70        }
71        result = reply.readInt32();
72        return result;
73    }
74
75    virtual status_t setBufferCount(int bufferCount)
76    {
77        Parcel data, reply;
78        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
79        data.writeInt32(bufferCount);
80        status_t result =remote()->transact(SET_BUFFER_COUNT, data, &reply);
81        if (result != NO_ERROR) {
82            return result;
83        }
84        result = reply.readInt32();
85        return result;
86    }
87
88    virtual status_t dequeueBuffer(int *buf, sp<Fence>* fence, bool async,
89            uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
90        Parcel data, reply;
91        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
92        data.writeInt32(async);
93        data.writeInt32(w);
94        data.writeInt32(h);
95        data.writeInt32(format);
96        data.writeInt32(usage);
97        status_t result = remote()->transact(DEQUEUE_BUFFER, data, &reply);
98        if (result != NO_ERROR) {
99            return result;
100        }
101        *buf = reply.readInt32();
102        bool nonNull = reply.readInt32();
103        if (nonNull) {
104            *fence = new Fence();
105            reply.read(**fence);
106        }
107        result = reply.readInt32();
108        return result;
109    }
110
111    virtual status_t queueBuffer(int buf,
112            const QueueBufferInput& input, QueueBufferOutput* output) {
113        Parcel data, reply;
114        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
115        data.writeInt32(buf);
116        data.write(input);
117        status_t result = remote()->transact(QUEUE_BUFFER, data, &reply);
118        if (result != NO_ERROR) {
119            return result;
120        }
121        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
122        result = reply.readInt32();
123        return result;
124    }
125
126    virtual void cancelBuffer(int buf, const sp<Fence>& fence) {
127        Parcel data, reply;
128        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
129        data.writeInt32(buf);
130        data.write(*fence.get());
131        remote()->transact(CANCEL_BUFFER, data, &reply);
132    }
133
134    virtual int query(int what, int* value) {
135        Parcel data, reply;
136        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
137        data.writeInt32(what);
138        status_t result = remote()->transact(QUERY, data, &reply);
139        if (result != NO_ERROR) {
140            return result;
141        }
142        value[0] = reply.readInt32();
143        result = reply.readInt32();
144        return result;
145    }
146
147    virtual status_t connect(const sp<IBinder>& token,
148            int api, bool producerControlledByApp, QueueBufferOutput* output) {
149        Parcel data, reply;
150        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
151        data.writeStrongBinder(token);
152        data.writeInt32(api);
153        data.writeInt32(producerControlledByApp);
154        status_t result = remote()->transact(CONNECT, data, &reply);
155        if (result != NO_ERROR) {
156            return result;
157        }
158        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
159        result = reply.readInt32();
160        return result;
161    }
162
163    virtual status_t disconnect(int api) {
164        Parcel data, reply;
165        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
166        data.writeInt32(api);
167        status_t result =remote()->transact(DISCONNECT, data, &reply);
168        if (result != NO_ERROR) {
169            return result;
170        }
171        result = reply.readInt32();
172        return result;
173    }
174
175    virtual status_t setSidebandStream(const sp<NativeHandle>& stream) {
176        Parcel data, reply;
177        status_t result;
178        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
179        if (stream.get()) {
180            data.writeInt32(true);
181            data.writeNativeHandle(stream->handle());
182        } else {
183            data.writeInt32(false);
184        }
185        if ((result = remote()->transact(SET_SIDEBAND_STREAM, data, &reply)) == NO_ERROR) {
186            result = reply.readInt32();
187        }
188        return result;
189    }
190};
191
192IMPLEMENT_META_INTERFACE(GraphicBufferProducer, "android.gui.IGraphicBufferProducer");
193
194// ----------------------------------------------------------------------
195
196status_t BnGraphicBufferProducer::onTransact(
197    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
198{
199    switch(code) {
200        case REQUEST_BUFFER: {
201            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
202            int bufferIdx   = data.readInt32();
203            sp<GraphicBuffer> buffer;
204            int result = requestBuffer(bufferIdx, &buffer);
205            reply->writeInt32(buffer != 0);
206            if (buffer != 0) {
207                reply->write(*buffer);
208            }
209            reply->writeInt32(result);
210            return NO_ERROR;
211        } break;
212        case SET_BUFFER_COUNT: {
213            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
214            int bufferCount = data.readInt32();
215            int result = setBufferCount(bufferCount);
216            reply->writeInt32(result);
217            return NO_ERROR;
218        } break;
219        case DEQUEUE_BUFFER: {
220            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
221            bool async      = data.readInt32();
222            uint32_t w      = data.readInt32();
223            uint32_t h      = data.readInt32();
224            uint32_t format = data.readInt32();
225            uint32_t usage  = data.readInt32();
226            int buf;
227            sp<Fence> fence;
228            int result = dequeueBuffer(&buf, &fence, async, w, h, format, usage);
229            reply->writeInt32(buf);
230            reply->writeInt32(fence != NULL);
231            if (fence != NULL) {
232                reply->write(*fence);
233            }
234            reply->writeInt32(result);
235            return NO_ERROR;
236        } break;
237        case QUEUE_BUFFER: {
238            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
239            int buf = data.readInt32();
240            QueueBufferInput input(data);
241            QueueBufferOutput* const output =
242                    reinterpret_cast<QueueBufferOutput *>(
243                            reply->writeInplace(sizeof(QueueBufferOutput)));
244            status_t result = queueBuffer(buf, input, output);
245            reply->writeInt32(result);
246            return NO_ERROR;
247        } break;
248        case CANCEL_BUFFER: {
249            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
250            int buf = data.readInt32();
251            sp<Fence> fence = new Fence();
252            data.read(*fence.get());
253            cancelBuffer(buf, fence);
254            return NO_ERROR;
255        } break;
256        case QUERY: {
257            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
258            int value;
259            int what = data.readInt32();
260            int res = query(what, &value);
261            reply->writeInt32(value);
262            reply->writeInt32(res);
263            return NO_ERROR;
264        } break;
265        case CONNECT: {
266            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
267            sp<IBinder> token = data.readStrongBinder();
268            int api = data.readInt32();
269            bool producerControlledByApp = data.readInt32();
270            QueueBufferOutput* const output =
271                    reinterpret_cast<QueueBufferOutput *>(
272                            reply->writeInplace(sizeof(QueueBufferOutput)));
273            status_t res = connect(token, api, producerControlledByApp, output);
274            reply->writeInt32(res);
275            return NO_ERROR;
276        } break;
277        case DISCONNECT: {
278            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
279            int api = data.readInt32();
280            status_t res = disconnect(api);
281            reply->writeInt32(res);
282            return NO_ERROR;
283        } break;
284        case SET_SIDEBAND_STREAM: {
285            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
286            sp<NativeHandle> stream;
287            if (data.readInt32()) {
288                stream = NativeHandle::create(data.readNativeHandle());
289            }
290            status_t result = setSidebandStream(stream);
291            reply->writeInt32(result);
292            return NO_ERROR;
293        } break;
294    }
295    return BBinder::onTransact(code, data, reply, flags);
296}
297
298// ----------------------------------------------------------------------------
299
300IGraphicBufferProducer::QueueBufferInput::QueueBufferInput(const Parcel& parcel) {
301    parcel.read(*this);
302}
303
304size_t IGraphicBufferProducer::QueueBufferInput::getFlattenedSize() const {
305    return sizeof(timestamp)
306         + sizeof(isAutoTimestamp)
307         + sizeof(crop)
308         + sizeof(scalingMode)
309         + sizeof(transform)
310         + sizeof(async)
311         + fence->getFlattenedSize();
312}
313
314size_t IGraphicBufferProducer::QueueBufferInput::getFdCount() const {
315    return fence->getFdCount();
316}
317
318status_t IGraphicBufferProducer::QueueBufferInput::flatten(
319        void*& buffer, size_t& size, int*& fds, size_t& count) const
320{
321    if (size < getFlattenedSize()) {
322        return NO_MEMORY;
323    }
324    FlattenableUtils::write(buffer, size, timestamp);
325    FlattenableUtils::write(buffer, size, isAutoTimestamp);
326    FlattenableUtils::write(buffer, size, crop);
327    FlattenableUtils::write(buffer, size, scalingMode);
328    FlattenableUtils::write(buffer, size, transform);
329    FlattenableUtils::write(buffer, size, async);
330    return fence->flatten(buffer, size, fds, count);
331}
332
333status_t IGraphicBufferProducer::QueueBufferInput::unflatten(
334        void const*& buffer, size_t& size, int const*& fds, size_t& count)
335{
336    size_t minNeeded =
337              sizeof(timestamp)
338            + sizeof(isAutoTimestamp)
339            + sizeof(crop)
340            + sizeof(scalingMode)
341            + sizeof(transform)
342            + sizeof(async);
343
344    if (size < minNeeded) {
345        return NO_MEMORY;
346    }
347
348    FlattenableUtils::read(buffer, size, timestamp);
349    FlattenableUtils::read(buffer, size, isAutoTimestamp);
350    FlattenableUtils::read(buffer, size, crop);
351    FlattenableUtils::read(buffer, size, scalingMode);
352    FlattenableUtils::read(buffer, size, transform);
353    FlattenableUtils::read(buffer, size, async);
354
355    fence = new Fence();
356    return fence->unflatten(buffer, size, fds, count);
357}
358
359}; // namespace android
360