IGraphicBufferProducer.cpp revision f0eaf25e9247edf4d124bedaeb863f7abdf35a3e 
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#include <gui/IProducerListener.h>
31
32namespace android {
33// ----------------------------------------------------------------------------
34
35enum {
36    REQUEST_BUFFER = IBinder::FIRST_CALL_TRANSACTION,
37    SET_BUFFER_COUNT,
38    DEQUEUE_BUFFER,
39    DETACH_BUFFER,
40    ATTACH_BUFFER,
41    QUEUE_BUFFER,
42    CANCEL_BUFFER,
43    QUERY,
44    CONNECT,
45    DISCONNECT,
46    SET_SIDEBAND_STREAM,
47};
48
49class BpGraphicBufferProducer : public BpInterface<IGraphicBufferProducer>
50{
51public:
52    BpGraphicBufferProducer(const sp<IBinder>& impl)
53        : BpInterface<IGraphicBufferProducer>(impl)
54    {
55    }
56
57    virtual status_t requestBuffer(int bufferIdx, sp<GraphicBuffer>* buf) {
58        Parcel data, reply;
59        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
60        data.writeInt32(bufferIdx);
61        status_t result =remote()->transact(REQUEST_BUFFER, data, &reply);
62        if (result != NO_ERROR) {
63            return result;
64        }
65        bool nonNull = reply.readInt32();
66        if (nonNull) {
67            *buf = new GraphicBuffer();
68            result = reply.read(**buf);
69            if(result != NO_ERROR) {
70                (*buf).clear();
71                return result;
72            }
73        }
74        result = reply.readInt32();
75        return result;
76    }
77
78    virtual status_t setBufferCount(int bufferCount)
79    {
80        Parcel data, reply;
81        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
82        data.writeInt32(bufferCount);
83        status_t result =remote()->transact(SET_BUFFER_COUNT, data, &reply);
84        if (result != NO_ERROR) {
85            return result;
86        }
87        result = reply.readInt32();
88        return result;
89    }
90
91    virtual status_t dequeueBuffer(int *buf, sp<Fence>* fence, bool async,
92            uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
93        Parcel data, reply;
94        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
95        data.writeInt32(async);
96        data.writeInt32(w);
97        data.writeInt32(h);
98        data.writeInt32(format);
99        data.writeInt32(usage);
100        status_t result = remote()->transact(DEQUEUE_BUFFER, data, &reply);
101        if (result != NO_ERROR) {
102            return result;
103        }
104        *buf = reply.readInt32();
105        bool nonNull = reply.readInt32();
106        if (nonNull) {
107            *fence = new Fence();
108            reply.read(**fence);
109        }
110        result = reply.readInt32();
111        return result;
112    }
113
114    virtual status_t detachBuffer(int slot) {
115        Parcel data, reply;
116        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
117        data.writeInt32(slot);
118        status_t result = remote()->transact(DETACH_BUFFER, data, &reply);
119        if (result != NO_ERROR) {
120            return result;
121        }
122        result = reply.readInt32();
123        return result;
124    }
125
126    virtual status_t attachBuffer(int* slot, const sp<GraphicBuffer>& buffer) {
127        Parcel data, reply;
128        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
129        data.write(*buffer.get());
130        status_t result = remote()->transact(ATTACH_BUFFER, data, &reply);
131        if (result != NO_ERROR) {
132            return result;
133        }
134        *slot = reply.readInt32();
135        result = reply.readInt32();
136        return result;
137    }
138
139    virtual status_t queueBuffer(int buf,
140            const QueueBufferInput& input, QueueBufferOutput* output) {
141        Parcel data, reply;
142        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
143        data.writeInt32(buf);
144        data.write(input);
145        status_t result = remote()->transact(QUEUE_BUFFER, data, &reply);
146        if (result != NO_ERROR) {
147            return result;
148        }
149        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
150        result = reply.readInt32();
151        return result;
152    }
153
154    virtual void cancelBuffer(int buf, const sp<Fence>& fence) {
155        Parcel data, reply;
156        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
157        data.writeInt32(buf);
158        data.write(*fence.get());
159        remote()->transact(CANCEL_BUFFER, data, &reply);
160    }
161
162    virtual int query(int what, int* value) {
163        Parcel data, reply;
164        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
165        data.writeInt32(what);
166        status_t result = remote()->transact(QUERY, data, &reply);
167        if (result != NO_ERROR) {
168            return result;
169        }
170        value[0] = reply.readInt32();
171        result = reply.readInt32();
172        return result;
173    }
174
175    virtual status_t connect(const sp<IProducerListener>& listener,
176            int api, bool producerControlledByApp, QueueBufferOutput* output) {
177        Parcel data, reply;
178        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
179        if (listener != NULL) {
180            data.writeInt32(1);
181            data.writeStrongBinder(listener->asBinder());
182        } else {
183            data.writeInt32(0);
184        }
185        data.writeInt32(api);
186        data.writeInt32(producerControlledByApp);
187        status_t result = remote()->transact(CONNECT, data, &reply);
188        if (result != NO_ERROR) {
189            return result;
190        }
191        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
192        result = reply.readInt32();
193        return result;
194    }
195
196    virtual status_t disconnect(int api) {
197        Parcel data, reply;
198        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
199        data.writeInt32(api);
200        status_t result =remote()->transact(DISCONNECT, data, &reply);
201        if (result != NO_ERROR) {
202            return result;
203        }
204        result = reply.readInt32();
205        return result;
206    }
207
208    virtual status_t setSidebandStream(const sp<NativeHandle>& stream) {
209        Parcel data, reply;
210        status_t result;
211        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
212        if (stream.get()) {
213            data.writeInt32(true);
214            data.writeNativeHandle(stream->handle());
215        } else {
216            data.writeInt32(false);
217        }
218        if ((result = remote()->transact(SET_SIDEBAND_STREAM, data, &reply)) == NO_ERROR) {
219            result = reply.readInt32();
220        }
221        return result;
222    }
223};
224
225IMPLEMENT_META_INTERFACE(GraphicBufferProducer, "android.gui.IGraphicBufferProducer");
226
227// ----------------------------------------------------------------------
228
229status_t BnGraphicBufferProducer::onTransact(
230    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
231{
232    switch(code) {
233        case REQUEST_BUFFER: {
234            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
235            int bufferIdx   = data.readInt32();
236            sp<GraphicBuffer> buffer;
237            int result = requestBuffer(bufferIdx, &buffer);
238            reply->writeInt32(buffer != 0);
239            if (buffer != 0) {
240                reply->write(*buffer);
241            }
242            reply->writeInt32(result);
243            return NO_ERROR;
244        } break;
245        case SET_BUFFER_COUNT: {
246            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
247            int bufferCount = data.readInt32();
248            int result = setBufferCount(bufferCount);
249            reply->writeInt32(result);
250            return NO_ERROR;
251        } break;
252        case DEQUEUE_BUFFER: {
253            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
254            bool async      = data.readInt32();
255            uint32_t w      = data.readInt32();
256            uint32_t h      = data.readInt32();
257            uint32_t format = data.readInt32();
258            uint32_t usage  = data.readInt32();
259            int buf;
260            sp<Fence> fence;
261            int result = dequeueBuffer(&buf, &fence, async, w, h, format, usage);
262            reply->writeInt32(buf);
263            reply->writeInt32(fence != NULL);
264            if (fence != NULL) {
265                reply->write(*fence);
266            }
267            reply->writeInt32(result);
268            return NO_ERROR;
269        } break;
270        case DETACH_BUFFER: {
271            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
272            int slot = data.readInt32();
273            int result = detachBuffer(slot);
274            reply->writeInt32(result);
275            return NO_ERROR;
276        } break;
277        case ATTACH_BUFFER: {
278            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
279            sp<GraphicBuffer> buffer = new GraphicBuffer();
280            data.read(*buffer.get());
281            int slot;
282            int result = attachBuffer(&slot, buffer);
283            reply->writeInt32(slot);
284            reply->writeInt32(result);
285            return NO_ERROR;
286        } break;
287        case QUEUE_BUFFER: {
288            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
289            int buf = data.readInt32();
290            QueueBufferInput input(data);
291            QueueBufferOutput* const output =
292                    reinterpret_cast<QueueBufferOutput *>(
293                            reply->writeInplace(sizeof(QueueBufferOutput)));
294            status_t result = queueBuffer(buf, input, output);
295            reply->writeInt32(result);
296            return NO_ERROR;
297        } break;
298        case CANCEL_BUFFER: {
299            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
300            int buf = data.readInt32();
301            sp<Fence> fence = new Fence();
302            data.read(*fence.get());
303            cancelBuffer(buf, fence);
304            return NO_ERROR;
305        } break;
306        case QUERY: {
307            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
308            int value;
309            int what = data.readInt32();
310            int res = query(what, &value);
311            reply->writeInt32(value);
312            reply->writeInt32(res);
313            return NO_ERROR;
314        } break;
315        case CONNECT: {
316            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
317            sp<IProducerListener> listener;
318            if (data.readInt32() == 1) {
319                listener = IProducerListener::asInterface(data.readStrongBinder());
320            }
321            int api = data.readInt32();
322            bool producerControlledByApp = data.readInt32();
323            QueueBufferOutput* const output =
324                    reinterpret_cast<QueueBufferOutput *>(
325                            reply->writeInplace(sizeof(QueueBufferOutput)));
326            status_t res = connect(listener, api, producerControlledByApp, output);
327            reply->writeInt32(res);
328            return NO_ERROR;
329        } break;
330        case DISCONNECT: {
331            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
332            int api = data.readInt32();
333            status_t res = disconnect(api);
334            reply->writeInt32(res);
335            return NO_ERROR;
336        } break;
337        case SET_SIDEBAND_STREAM: {
338            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
339            sp<NativeHandle> stream;
340            if (data.readInt32()) {
341                stream = NativeHandle::create(data.readNativeHandle());
342            }
343            status_t result = setSidebandStream(stream);
344            reply->writeInt32(result);
345            return NO_ERROR;
346        } break;
347    }
348    return BBinder::onTransact(code, data, reply, flags);
349}
350
351// ----------------------------------------------------------------------------
352
353IGraphicBufferProducer::QueueBufferInput::QueueBufferInput(const Parcel& parcel) {
354    parcel.read(*this);
355}
356
357size_t IGraphicBufferProducer::QueueBufferInput::getFlattenedSize() const {
358    return sizeof(timestamp)
359         + sizeof(isAutoTimestamp)
360         + sizeof(crop)
361         + sizeof(scalingMode)
362         + sizeof(transform)
363         + sizeof(async)
364         + fence->getFlattenedSize();
365}
366
367size_t IGraphicBufferProducer::QueueBufferInput::getFdCount() const {
368    return fence->getFdCount();
369}
370
371status_t IGraphicBufferProducer::QueueBufferInput::flatten(
372        void*& buffer, size_t& size, int*& fds, size_t& count) const
373{
374    if (size < getFlattenedSize()) {
375        return NO_MEMORY;
376    }
377    FlattenableUtils::write(buffer, size, timestamp);
378    FlattenableUtils::write(buffer, size, isAutoTimestamp);
379    FlattenableUtils::write(buffer, size, crop);
380    FlattenableUtils::write(buffer, size, scalingMode);
381    FlattenableUtils::write(buffer, size, transform);
382    FlattenableUtils::write(buffer, size, async);
383    return fence->flatten(buffer, size, fds, count);
384}
385
386status_t IGraphicBufferProducer::QueueBufferInput::unflatten(
387        void const*& buffer, size_t& size, int const*& fds, size_t& count)
388{
389    size_t minNeeded =
390              sizeof(timestamp)
391            + sizeof(isAutoTimestamp)
392            + sizeof(crop)
393            + sizeof(scalingMode)
394            + sizeof(transform)
395            + sizeof(async);
396
397    if (size < minNeeded) {
398        return NO_MEMORY;
399    }
400
401    FlattenableUtils::read(buffer, size, timestamp);
402    FlattenableUtils::read(buffer, size, isAutoTimestamp);
403    FlattenableUtils::read(buffer, size, crop);
404    FlattenableUtils::read(buffer, size, scalingMode);
405    FlattenableUtils::read(buffer, size, transform);
406    FlattenableUtils::read(buffer, size, async);
407
408    fence = new Fence();
409    return fence->unflatten(buffer, size, fds, count);
410}
411
412}; // namespace android
413