IGraphicBufferProducer.cpp revision 5b75a513e431c097ae704cba2f7affa6bfaecec9 
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    DETACH_NEXT_BUFFER,
41    ATTACH_BUFFER,
42    QUEUE_BUFFER,
43    CANCEL_BUFFER,
44    QUERY,
45    CONNECT,
46    DISCONNECT,
47    SET_SIDEBAND_STREAM,
48    ALLOCATE_BUFFERS,
49};
50
51class BpGraphicBufferProducer : public BpInterface<IGraphicBufferProducer>
52{
53public:
54    BpGraphicBufferProducer(const sp<IBinder>& impl)
55        : BpInterface<IGraphicBufferProducer>(impl)
56    {
57    }
58
59    virtual ~BpGraphicBufferProducer();
60
61    virtual status_t requestBuffer(int bufferIdx, sp<GraphicBuffer>* buf) {
62        Parcel data, reply;
63        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
64        data.writeInt32(bufferIdx);
65        status_t result =remote()->transact(REQUEST_BUFFER, data, &reply);
66        if (result != NO_ERROR) {
67            return result;
68        }
69        bool nonNull = reply.readInt32();
70        if (nonNull) {
71            *buf = new GraphicBuffer();
72            result = reply.read(**buf);
73            if(result != NO_ERROR) {
74                (*buf).clear();
75                return result;
76            }
77        }
78        result = reply.readInt32();
79        return result;
80    }
81
82    virtual status_t setBufferCount(int bufferCount)
83    {
84        Parcel data, reply;
85        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
86        data.writeInt32(bufferCount);
87        status_t result =remote()->transact(SET_BUFFER_COUNT, data, &reply);
88        if (result != NO_ERROR) {
89            return result;
90        }
91        result = reply.readInt32();
92        return result;
93    }
94
95    virtual status_t dequeueBuffer(int *buf, sp<Fence>* fence, bool async,
96            uint32_t width, uint32_t height, PixelFormat format,
97            uint32_t usage) {
98        Parcel data, reply;
99        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
100        data.writeInt32(static_cast<int32_t>(async));
101        data.writeUint32(width);
102        data.writeUint32(height);
103        data.writeInt32(static_cast<int32_t>(format));
104        data.writeUint32(usage);
105        status_t result = remote()->transact(DEQUEUE_BUFFER, data, &reply);
106        if (result != NO_ERROR) {
107            return result;
108        }
109        *buf = reply.readInt32();
110        bool nonNull = reply.readInt32();
111        if (nonNull) {
112            *fence = new Fence();
113            reply.read(**fence);
114        }
115        result = reply.readInt32();
116        return result;
117    }
118
119    virtual status_t detachBuffer(int slot) {
120        Parcel data, reply;
121        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
122        data.writeInt32(slot);
123        status_t result = remote()->transact(DETACH_BUFFER, data, &reply);
124        if (result != NO_ERROR) {
125            return result;
126        }
127        result = reply.readInt32();
128        return result;
129    }
130
131    virtual status_t detachNextBuffer(sp<GraphicBuffer>* outBuffer,
132            sp<Fence>* outFence) {
133        if (outBuffer == NULL) {
134            ALOGE("detachNextBuffer: outBuffer must not be NULL");
135            return BAD_VALUE;
136        } else if (outFence == NULL) {
137            ALOGE("detachNextBuffer: outFence must not be NULL");
138            return BAD_VALUE;
139        }
140        Parcel data, reply;
141        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
142        status_t result = remote()->transact(DETACH_NEXT_BUFFER, data, &reply);
143        if (result != NO_ERROR) {
144            return result;
145        }
146        result = reply.readInt32();
147        if (result == NO_ERROR) {
148            bool nonNull = reply.readInt32();
149            if (nonNull) {
150                *outBuffer = new GraphicBuffer;
151                reply.read(**outBuffer);
152            }
153            nonNull = reply.readInt32();
154            if (nonNull) {
155                *outFence = new Fence;
156                reply.read(**outFence);
157            }
158        }
159        return result;
160    }
161
162    virtual status_t attachBuffer(int* slot, const sp<GraphicBuffer>& buffer) {
163        Parcel data, reply;
164        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
165        data.write(*buffer.get());
166        status_t result = remote()->transact(ATTACH_BUFFER, data, &reply);
167        if (result != NO_ERROR) {
168            return result;
169        }
170        *slot = reply.readInt32();
171        result = reply.readInt32();
172        return result;
173    }
174
175    virtual status_t queueBuffer(int buf,
176            const QueueBufferInput& input, QueueBufferOutput* output) {
177        Parcel data, reply;
178        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
179        data.writeInt32(buf);
180        data.write(input);
181        status_t result = remote()->transact(QUEUE_BUFFER, data, &reply);
182        if (result != NO_ERROR) {
183            return result;
184        }
185        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
186        result = reply.readInt32();
187        return result;
188    }
189
190    virtual void cancelBuffer(int buf, const sp<Fence>& fence) {
191        Parcel data, reply;
192        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
193        data.writeInt32(buf);
194        data.write(*fence.get());
195        remote()->transact(CANCEL_BUFFER, data, &reply);
196    }
197
198    virtual int query(int what, int* value) {
199        Parcel data, reply;
200        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
201        data.writeInt32(what);
202        status_t result = remote()->transact(QUERY, data, &reply);
203        if (result != NO_ERROR) {
204            return result;
205        }
206        value[0] = reply.readInt32();
207        result = reply.readInt32();
208        return result;
209    }
210
211    virtual status_t connect(const sp<IProducerListener>& listener,
212            int api, bool producerControlledByApp, QueueBufferOutput* output) {
213        Parcel data, reply;
214        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
215        if (listener != NULL) {
216            data.writeInt32(1);
217            data.writeStrongBinder(IInterface::asBinder(listener));
218        } else {
219            data.writeInt32(0);
220        }
221        data.writeInt32(api);
222        data.writeInt32(producerControlledByApp);
223        status_t result = remote()->transact(CONNECT, data, &reply);
224        if (result != NO_ERROR) {
225            return result;
226        }
227        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
228        result = reply.readInt32();
229        return result;
230    }
231
232    virtual status_t disconnect(int api) {
233        Parcel data, reply;
234        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
235        data.writeInt32(api);
236        status_t result =remote()->transact(DISCONNECT, data, &reply);
237        if (result != NO_ERROR) {
238            return result;
239        }
240        result = reply.readInt32();
241        return result;
242    }
243
244    virtual status_t setSidebandStream(const sp<NativeHandle>& stream) {
245        Parcel data, reply;
246        status_t result;
247        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
248        if (stream.get()) {
249            data.writeInt32(true);
250            data.writeNativeHandle(stream->handle());
251        } else {
252            data.writeInt32(false);
253        }
254        if ((result = remote()->transact(SET_SIDEBAND_STREAM, data, &reply)) == NO_ERROR) {
255            result = reply.readInt32();
256        }
257        return result;
258    }
259
260    virtual void allocateBuffers(bool async, uint32_t width, uint32_t height,
261            PixelFormat format, uint32_t usage) {
262        Parcel data, reply;
263        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
264        data.writeInt32(static_cast<int32_t>(async));
265        data.writeUint32(width);
266        data.writeUint32(height);
267        data.writeInt32(static_cast<int32_t>(format));
268        data.writeUint32(usage);
269        status_t result = remote()->transact(ALLOCATE_BUFFERS, data, &reply);
270        if (result != NO_ERROR) {
271            ALOGE("allocateBuffers failed to transact: %d", result);
272        }
273    }
274};
275
276// Out-of-line virtual method definition to trigger vtable emission in this
277// translation unit (see clang warning -Wweak-vtables)
278BpGraphicBufferProducer::~BpGraphicBufferProducer() {}
279
280IMPLEMENT_META_INTERFACE(GraphicBufferProducer, "android.gui.IGraphicBufferProducer");
281
282// ----------------------------------------------------------------------
283
284status_t BnGraphicBufferProducer::onTransact(
285    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
286{
287    switch(code) {
288        case REQUEST_BUFFER: {
289            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
290            int bufferIdx   = data.readInt32();
291            sp<GraphicBuffer> buffer;
292            int result = requestBuffer(bufferIdx, &buffer);
293            reply->writeInt32(buffer != 0);
294            if (buffer != 0) {
295                reply->write(*buffer);
296            }
297            reply->writeInt32(result);
298            return NO_ERROR;
299        }
300        case SET_BUFFER_COUNT: {
301            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
302            int bufferCount = data.readInt32();
303            int result = setBufferCount(bufferCount);
304            reply->writeInt32(result);
305            return NO_ERROR;
306        }
307        case DEQUEUE_BUFFER: {
308            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
309            bool async = static_cast<bool>(data.readInt32());
310            uint32_t width = data.readUint32();
311            uint32_t height = data.readUint32();
312            PixelFormat format = static_cast<PixelFormat>(data.readInt32());
313            uint32_t usage = data.readUint32();
314            int buf;
315            sp<Fence> fence;
316            int result = dequeueBuffer(&buf, &fence, async, width, height,
317                    format, usage);
318            reply->writeInt32(buf);
319            reply->writeInt32(fence != NULL);
320            if (fence != NULL) {
321                reply->write(*fence);
322            }
323            reply->writeInt32(result);
324            return NO_ERROR;
325        }
326        case DETACH_BUFFER: {
327            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
328            int slot = data.readInt32();
329            int result = detachBuffer(slot);
330            reply->writeInt32(result);
331            return NO_ERROR;
332        }
333        case DETACH_NEXT_BUFFER: {
334            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
335            sp<GraphicBuffer> buffer;
336            sp<Fence> fence;
337            int32_t result = detachNextBuffer(&buffer, &fence);
338            reply->writeInt32(result);
339            if (result == NO_ERROR) {
340                reply->writeInt32(buffer != NULL);
341                if (buffer != NULL) {
342                    reply->write(*buffer);
343                }
344                reply->writeInt32(fence != NULL);
345                if (fence != NULL) {
346                    reply->write(*fence);
347                }
348            }
349            return NO_ERROR;
350        }
351        case ATTACH_BUFFER: {
352            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
353            sp<GraphicBuffer> buffer = new GraphicBuffer();
354            data.read(*buffer.get());
355            int slot;
356            int result = attachBuffer(&slot, buffer);
357            reply->writeInt32(slot);
358            reply->writeInt32(result);
359            return NO_ERROR;
360        }
361        case QUEUE_BUFFER: {
362            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
363            int buf = data.readInt32();
364            QueueBufferInput input(data);
365            QueueBufferOutput* const output =
366                    reinterpret_cast<QueueBufferOutput *>(
367                            reply->writeInplace(sizeof(QueueBufferOutput)));
368            status_t result = queueBuffer(buf, input, output);
369            reply->writeInt32(result);
370            return NO_ERROR;
371        }
372        case CANCEL_BUFFER: {
373            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
374            int buf = data.readInt32();
375            sp<Fence> fence = new Fence();
376            data.read(*fence.get());
377            cancelBuffer(buf, fence);
378            return NO_ERROR;
379        }
380        case QUERY: {
381            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
382            int value;
383            int what = data.readInt32();
384            int res = query(what, &value);
385            reply->writeInt32(value);
386            reply->writeInt32(res);
387            return NO_ERROR;
388        }
389        case CONNECT: {
390            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
391            sp<IProducerListener> listener;
392            if (data.readInt32() == 1) {
393                listener = IProducerListener::asInterface(data.readStrongBinder());
394            }
395            int api = data.readInt32();
396            bool producerControlledByApp = data.readInt32();
397            QueueBufferOutput* const output =
398                    reinterpret_cast<QueueBufferOutput *>(
399                            reply->writeInplace(sizeof(QueueBufferOutput)));
400            status_t res = connect(listener, api, producerControlledByApp, output);
401            reply->writeInt32(res);
402            return NO_ERROR;
403        }
404        case DISCONNECT: {
405            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
406            int api = data.readInt32();
407            status_t res = disconnect(api);
408            reply->writeInt32(res);
409            return NO_ERROR;
410        }
411        case SET_SIDEBAND_STREAM: {
412            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
413            sp<NativeHandle> stream;
414            if (data.readInt32()) {
415                stream = NativeHandle::create(data.readNativeHandle(), true);
416            }
417            status_t result = setSidebandStream(stream);
418            reply->writeInt32(result);
419            return NO_ERROR;
420        }
421        case ALLOCATE_BUFFERS:
422            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
423            bool async = static_cast<bool>(data.readInt32());
424            uint32_t width = data.readUint32();
425            uint32_t height = data.readUint32();
426            PixelFormat format = static_cast<PixelFormat>(data.readInt32());
427            uint32_t usage = data.readUint32();
428            allocateBuffers(async, width, height, format, usage);
429            return NO_ERROR;
430    }
431    return BBinder::onTransact(code, data, reply, flags);
432}
433
434// ----------------------------------------------------------------------------
435
436IGraphicBufferProducer::QueueBufferInput::QueueBufferInput(const Parcel& parcel) {
437    parcel.read(*this);
438}
439
440size_t IGraphicBufferProducer::QueueBufferInput::getFlattenedSize() const {
441    return sizeof(timestamp)
442         + sizeof(isAutoTimestamp)
443         + sizeof(dataSpace)
444         + sizeof(crop)
445         + sizeof(scalingMode)
446         + sizeof(transform)
447         + sizeof(stickyTransform)
448         + sizeof(async)
449         + fence->getFlattenedSize();
450}
451
452size_t IGraphicBufferProducer::QueueBufferInput::getFdCount() const {
453    return fence->getFdCount();
454}
455
456status_t IGraphicBufferProducer::QueueBufferInput::flatten(
457        void*& buffer, size_t& size, int*& fds, size_t& count) const
458{
459    if (size < getFlattenedSize()) {
460        return NO_MEMORY;
461    }
462    FlattenableUtils::write(buffer, size, timestamp);
463    FlattenableUtils::write(buffer, size, isAutoTimestamp);
464    FlattenableUtils::write(buffer, size, dataSpace);
465    FlattenableUtils::write(buffer, size, crop);
466    FlattenableUtils::write(buffer, size, scalingMode);
467    FlattenableUtils::write(buffer, size, transform);
468    FlattenableUtils::write(buffer, size, stickyTransform);
469    FlattenableUtils::write(buffer, size, async);
470    return fence->flatten(buffer, size, fds, count);
471}
472
473status_t IGraphicBufferProducer::QueueBufferInput::unflatten(
474        void const*& buffer, size_t& size, int const*& fds, size_t& count)
475{
476    size_t minNeeded =
477              sizeof(timestamp)
478            + sizeof(isAutoTimestamp)
479            + sizeof(dataSpace)
480            + sizeof(crop)
481            + sizeof(scalingMode)
482            + sizeof(transform)
483            + sizeof(stickyTransform)
484            + sizeof(async);
485
486    if (size < minNeeded) {
487        return NO_MEMORY;
488    }
489
490    FlattenableUtils::read(buffer, size, timestamp);
491    FlattenableUtils::read(buffer, size, isAutoTimestamp);
492    FlattenableUtils::read(buffer, size, dataSpace);
493    FlattenableUtils::read(buffer, size, crop);
494    FlattenableUtils::read(buffer, size, scalingMode);
495    FlattenableUtils::read(buffer, size, transform);
496    FlattenableUtils::read(buffer, size, stickyTransform);
497    FlattenableUtils::read(buffer, size, async);
498
499    fence = new Fence();
500    return fence->unflatten(buffer, size, fds, count);
501}
502
503}; // namespace android
504