IGraphicBufferProducer.cpp revision 9de7293b0a1b01ebe6fb1ab4a498f144adc8029f 
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    ALLOW_ALLOCATION,
50};
51
52class BpGraphicBufferProducer : public BpInterface<IGraphicBufferProducer>
53{
54public:
55    BpGraphicBufferProducer(const sp<IBinder>& impl)
56        : BpInterface<IGraphicBufferProducer>(impl)
57    {
58    }
59
60    virtual ~BpGraphicBufferProducer();
61
62    virtual status_t requestBuffer(int bufferIdx, sp<GraphicBuffer>* buf) {
63        Parcel data, reply;
64        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
65        data.writeInt32(bufferIdx);
66        status_t result =remote()->transact(REQUEST_BUFFER, data, &reply);
67        if (result != NO_ERROR) {
68            return result;
69        }
70        bool nonNull = reply.readInt32();
71        if (nonNull) {
72            *buf = new GraphicBuffer();
73            result = reply.read(**buf);
74            if(result != NO_ERROR) {
75                (*buf).clear();
76                return result;
77            }
78        }
79        result = reply.readInt32();
80        return result;
81    }
82
83    virtual status_t setBufferCount(int bufferCount)
84    {
85        Parcel data, reply;
86        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
87        data.writeInt32(bufferCount);
88        status_t result =remote()->transact(SET_BUFFER_COUNT, data, &reply);
89        if (result != NO_ERROR) {
90            return result;
91        }
92        result = reply.readInt32();
93        return result;
94    }
95
96    virtual status_t dequeueBuffer(int *buf, sp<Fence>* fence, bool async,
97            uint32_t width, uint32_t height, PixelFormat format,
98            uint32_t usage) {
99        Parcel data, reply;
100        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
101        data.writeInt32(static_cast<int32_t>(async));
102        data.writeUint32(width);
103        data.writeUint32(height);
104        data.writeInt32(static_cast<int32_t>(format));
105        data.writeUint32(usage);
106        status_t result = remote()->transact(DEQUEUE_BUFFER, data, &reply);
107        if (result != NO_ERROR) {
108            return result;
109        }
110        *buf = reply.readInt32();
111        bool nonNull = reply.readInt32();
112        if (nonNull) {
113            *fence = new Fence();
114            reply.read(**fence);
115        }
116        result = reply.readInt32();
117        return result;
118    }
119
120    virtual status_t detachBuffer(int slot) {
121        Parcel data, reply;
122        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
123        data.writeInt32(slot);
124        status_t result = remote()->transact(DETACH_BUFFER, data, &reply);
125        if (result != NO_ERROR) {
126            return result;
127        }
128        result = reply.readInt32();
129        return result;
130    }
131
132    virtual status_t detachNextBuffer(sp<GraphicBuffer>* outBuffer,
133            sp<Fence>* outFence) {
134        if (outBuffer == NULL) {
135            ALOGE("detachNextBuffer: outBuffer must not be NULL");
136            return BAD_VALUE;
137        } else if (outFence == NULL) {
138            ALOGE("detachNextBuffer: outFence must not be NULL");
139            return BAD_VALUE;
140        }
141        Parcel data, reply;
142        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
143        status_t result = remote()->transact(DETACH_NEXT_BUFFER, data, &reply);
144        if (result != NO_ERROR) {
145            return result;
146        }
147        result = reply.readInt32();
148        if (result == NO_ERROR) {
149            bool nonNull = reply.readInt32();
150            if (nonNull) {
151                *outBuffer = new GraphicBuffer;
152                reply.read(**outBuffer);
153            }
154            nonNull = reply.readInt32();
155            if (nonNull) {
156                *outFence = new Fence;
157                reply.read(**outFence);
158            }
159        }
160        return result;
161    }
162
163    virtual status_t attachBuffer(int* slot, const sp<GraphicBuffer>& buffer) {
164        Parcel data, reply;
165        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
166        data.write(*buffer.get());
167        status_t result = remote()->transact(ATTACH_BUFFER, data, &reply);
168        if (result != NO_ERROR) {
169            return result;
170        }
171        *slot = reply.readInt32();
172        result = reply.readInt32();
173        return result;
174    }
175
176    virtual status_t queueBuffer(int buf,
177            const QueueBufferInput& input, QueueBufferOutput* output) {
178        Parcel data, reply;
179        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
180        data.writeInt32(buf);
181        data.write(input);
182        status_t result = remote()->transact(QUEUE_BUFFER, data, &reply);
183        if (result != NO_ERROR) {
184            return result;
185        }
186        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
187        result = reply.readInt32();
188        return result;
189    }
190
191    virtual void cancelBuffer(int buf, const sp<Fence>& fence) {
192        Parcel data, reply;
193        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
194        data.writeInt32(buf);
195        data.write(*fence.get());
196        remote()->transact(CANCEL_BUFFER, data, &reply);
197    }
198
199    virtual int query(int what, int* value) {
200        Parcel data, reply;
201        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
202        data.writeInt32(what);
203        status_t result = remote()->transact(QUERY, data, &reply);
204        if (result != NO_ERROR) {
205            return result;
206        }
207        value[0] = reply.readInt32();
208        result = reply.readInt32();
209        return result;
210    }
211
212    virtual status_t connect(const sp<IProducerListener>& listener,
213            int api, bool producerControlledByApp, QueueBufferOutput* output) {
214        Parcel data, reply;
215        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
216        if (listener != NULL) {
217            data.writeInt32(1);
218            data.writeStrongBinder(IInterface::asBinder(listener));
219        } else {
220            data.writeInt32(0);
221        }
222        data.writeInt32(api);
223        data.writeInt32(producerControlledByApp);
224        status_t result = remote()->transact(CONNECT, data, &reply);
225        if (result != NO_ERROR) {
226            return result;
227        }
228        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
229        result = reply.readInt32();
230        return result;
231    }
232
233    virtual status_t disconnect(int api) {
234        Parcel data, reply;
235        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
236        data.writeInt32(api);
237        status_t result =remote()->transact(DISCONNECT, data, &reply);
238        if (result != NO_ERROR) {
239            return result;
240        }
241        result = reply.readInt32();
242        return result;
243    }
244
245    virtual status_t setSidebandStream(const sp<NativeHandle>& stream) {
246        Parcel data, reply;
247        status_t result;
248        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
249        if (stream.get()) {
250            data.writeInt32(true);
251            data.writeNativeHandle(stream->handle());
252        } else {
253            data.writeInt32(false);
254        }
255        if ((result = remote()->transact(SET_SIDEBAND_STREAM, data, &reply)) == NO_ERROR) {
256            result = reply.readInt32();
257        }
258        return result;
259    }
260
261    virtual void allocateBuffers(bool async, uint32_t width, uint32_t height,
262            PixelFormat format, uint32_t usage) {
263        Parcel data, reply;
264        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
265        data.writeInt32(static_cast<int32_t>(async));
266        data.writeUint32(width);
267        data.writeUint32(height);
268        data.writeInt32(static_cast<int32_t>(format));
269        data.writeUint32(usage);
270        status_t result = remote()->transact(ALLOCATE_BUFFERS, data, &reply);
271        if (result != NO_ERROR) {
272            ALOGE("allocateBuffers failed to transact: %d", result);
273        }
274    }
275
276    virtual status_t allowAllocation(bool allow) {
277        Parcel data, reply;
278        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
279        data.writeInt32(static_cast<int32_t>(allow));
280        status_t result = remote()->transact(ALLOW_ALLOCATION, data, &reply);
281        if (result != NO_ERROR) {
282            return result;
283        }
284        result = reply.readInt32();
285        return result;
286    }
287};
288
289// Out-of-line virtual method definition to trigger vtable emission in this
290// translation unit (see clang warning -Wweak-vtables)
291BpGraphicBufferProducer::~BpGraphicBufferProducer() {}
292
293IMPLEMENT_META_INTERFACE(GraphicBufferProducer, "android.gui.IGraphicBufferProducer");
294
295// ----------------------------------------------------------------------
296
297status_t BnGraphicBufferProducer::onTransact(
298    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
299{
300    switch(code) {
301        case REQUEST_BUFFER: {
302            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
303            int bufferIdx   = data.readInt32();
304            sp<GraphicBuffer> buffer;
305            int result = requestBuffer(bufferIdx, &buffer);
306            reply->writeInt32(buffer != 0);
307            if (buffer != 0) {
308                reply->write(*buffer);
309            }
310            reply->writeInt32(result);
311            return NO_ERROR;
312        }
313        case SET_BUFFER_COUNT: {
314            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
315            int bufferCount = data.readInt32();
316            int result = setBufferCount(bufferCount);
317            reply->writeInt32(result);
318            return NO_ERROR;
319        }
320        case DEQUEUE_BUFFER: {
321            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
322            bool async = static_cast<bool>(data.readInt32());
323            uint32_t width = data.readUint32();
324            uint32_t height = data.readUint32();
325            PixelFormat format = static_cast<PixelFormat>(data.readInt32());
326            uint32_t usage = data.readUint32();
327            int buf;
328            sp<Fence> fence;
329            int result = dequeueBuffer(&buf, &fence, async, width, height,
330                    format, usage);
331            reply->writeInt32(buf);
332            reply->writeInt32(fence != NULL);
333            if (fence != NULL) {
334                reply->write(*fence);
335            }
336            reply->writeInt32(result);
337            return NO_ERROR;
338        }
339        case DETACH_BUFFER: {
340            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
341            int slot = data.readInt32();
342            int result = detachBuffer(slot);
343            reply->writeInt32(result);
344            return NO_ERROR;
345        }
346        case DETACH_NEXT_BUFFER: {
347            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
348            sp<GraphicBuffer> buffer;
349            sp<Fence> fence;
350            int32_t result = detachNextBuffer(&buffer, &fence);
351            reply->writeInt32(result);
352            if (result == NO_ERROR) {
353                reply->writeInt32(buffer != NULL);
354                if (buffer != NULL) {
355                    reply->write(*buffer);
356                }
357                reply->writeInt32(fence != NULL);
358                if (fence != NULL) {
359                    reply->write(*fence);
360                }
361            }
362            return NO_ERROR;
363        }
364        case ATTACH_BUFFER: {
365            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
366            sp<GraphicBuffer> buffer = new GraphicBuffer();
367            data.read(*buffer.get());
368            int slot;
369            int result = attachBuffer(&slot, buffer);
370            reply->writeInt32(slot);
371            reply->writeInt32(result);
372            return NO_ERROR;
373        }
374        case QUEUE_BUFFER: {
375            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
376            int buf = data.readInt32();
377            QueueBufferInput input(data);
378            QueueBufferOutput* const output =
379                    reinterpret_cast<QueueBufferOutput *>(
380                            reply->writeInplace(sizeof(QueueBufferOutput)));
381            status_t result = queueBuffer(buf, input, output);
382            reply->writeInt32(result);
383            return NO_ERROR;
384        }
385        case CANCEL_BUFFER: {
386            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
387            int buf = data.readInt32();
388            sp<Fence> fence = new Fence();
389            data.read(*fence.get());
390            cancelBuffer(buf, fence);
391            return NO_ERROR;
392        }
393        case QUERY: {
394            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
395            int value;
396            int what = data.readInt32();
397            int res = query(what, &value);
398            reply->writeInt32(value);
399            reply->writeInt32(res);
400            return NO_ERROR;
401        }
402        case CONNECT: {
403            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
404            sp<IProducerListener> listener;
405            if (data.readInt32() == 1) {
406                listener = IProducerListener::asInterface(data.readStrongBinder());
407            }
408            int api = data.readInt32();
409            bool producerControlledByApp = data.readInt32();
410            QueueBufferOutput* const output =
411                    reinterpret_cast<QueueBufferOutput *>(
412                            reply->writeInplace(sizeof(QueueBufferOutput)));
413            status_t res = connect(listener, api, producerControlledByApp, output);
414            reply->writeInt32(res);
415            return NO_ERROR;
416        }
417        case DISCONNECT: {
418            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
419            int api = data.readInt32();
420            status_t res = disconnect(api);
421            reply->writeInt32(res);
422            return NO_ERROR;
423        }
424        case SET_SIDEBAND_STREAM: {
425            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
426            sp<NativeHandle> stream;
427            if (data.readInt32()) {
428                stream = NativeHandle::create(data.readNativeHandle(), true);
429            }
430            status_t result = setSidebandStream(stream);
431            reply->writeInt32(result);
432            return NO_ERROR;
433        }
434        case ALLOCATE_BUFFERS: {
435            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
436            bool async = static_cast<bool>(data.readInt32());
437            uint32_t width = data.readUint32();
438            uint32_t height = data.readUint32();
439            PixelFormat format = static_cast<PixelFormat>(data.readInt32());
440            uint32_t usage = data.readUint32();
441            allocateBuffers(async, width, height, format, usage);
442            return NO_ERROR;
443        }
444        case ALLOW_ALLOCATION: {
445            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
446            bool allow = static_cast<bool>(data.readInt32());
447            status_t result = allowAllocation(allow);
448            reply->writeInt32(result);
449            return NO_ERROR;
450        }
451    }
452    return BBinder::onTransact(code, data, reply, flags);
453}
454
455// ----------------------------------------------------------------------------
456
457IGraphicBufferProducer::QueueBufferInput::QueueBufferInput(const Parcel& parcel) {
458    parcel.read(*this);
459}
460
461size_t IGraphicBufferProducer::QueueBufferInput::getFlattenedSize() const {
462    return sizeof(timestamp)
463         + sizeof(isAutoTimestamp)
464         + sizeof(dataSpace)
465         + sizeof(crop)
466         + sizeof(scalingMode)
467         + sizeof(transform)
468         + sizeof(stickyTransform)
469         + sizeof(async)
470         + fence->getFlattenedSize()
471         + surfaceDamage.getFlattenedSize();
472}
473
474size_t IGraphicBufferProducer::QueueBufferInput::getFdCount() const {
475    return fence->getFdCount();
476}
477
478status_t IGraphicBufferProducer::QueueBufferInput::flatten(
479        void*& buffer, size_t& size, int*& fds, size_t& count) const
480{
481    if (size < getFlattenedSize()) {
482        return NO_MEMORY;
483    }
484    FlattenableUtils::write(buffer, size, timestamp);
485    FlattenableUtils::write(buffer, size, isAutoTimestamp);
486    FlattenableUtils::write(buffer, size, dataSpace);
487    FlattenableUtils::write(buffer, size, crop);
488    FlattenableUtils::write(buffer, size, scalingMode);
489    FlattenableUtils::write(buffer, size, transform);
490    FlattenableUtils::write(buffer, size, stickyTransform);
491    FlattenableUtils::write(buffer, size, async);
492    status_t result = fence->flatten(buffer, size, fds, count);
493    if (result != NO_ERROR) {
494        return result;
495    }
496    return surfaceDamage.flatten(buffer, size);
497}
498
499status_t IGraphicBufferProducer::QueueBufferInput::unflatten(
500        void const*& buffer, size_t& size, int const*& fds, size_t& count)
501{
502    size_t minNeeded =
503              sizeof(timestamp)
504            + sizeof(isAutoTimestamp)
505            + sizeof(dataSpace)
506            + sizeof(crop)
507            + sizeof(scalingMode)
508            + sizeof(transform)
509            + sizeof(stickyTransform)
510            + sizeof(async);
511
512    if (size < minNeeded) {
513        return NO_MEMORY;
514    }
515
516    FlattenableUtils::read(buffer, size, timestamp);
517    FlattenableUtils::read(buffer, size, isAutoTimestamp);
518    FlattenableUtils::read(buffer, size, dataSpace);
519    FlattenableUtils::read(buffer, size, crop);
520    FlattenableUtils::read(buffer, size, scalingMode);
521    FlattenableUtils::read(buffer, size, transform);
522    FlattenableUtils::read(buffer, size, stickyTransform);
523    FlattenableUtils::read(buffer, size, async);
524
525    fence = new Fence();
526    status_t result = fence->unflatten(buffer, size, fds, count);
527    if (result != NO_ERROR) {
528        return result;
529    }
530    return surfaceDamage.unflatten(buffer, size);
531}
532
533}; // namespace android
534