IGraphicBufferProducer.cpp revision a2ca9bf0a9789e9e5e37961ebfb356347f59309e 
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    SET_GENERATION_NUMBER,
51};
52
53class BpGraphicBufferProducer : public BpInterface<IGraphicBufferProducer>
54{
55public:
56    BpGraphicBufferProducer(const sp<IBinder>& impl)
57        : BpInterface<IGraphicBufferProducer>(impl)
58    {
59    }
60
61    virtual ~BpGraphicBufferProducer();
62
63    virtual status_t requestBuffer(int bufferIdx, sp<GraphicBuffer>* buf) {
64        Parcel data, reply;
65        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
66        data.writeInt32(bufferIdx);
67        status_t result =remote()->transact(REQUEST_BUFFER, data, &reply);
68        if (result != NO_ERROR) {
69            return result;
70        }
71        bool nonNull = reply.readInt32();
72        if (nonNull) {
73            *buf = new GraphicBuffer();
74            result = reply.read(**buf);
75            if(result != NO_ERROR) {
76                (*buf).clear();
77                return result;
78            }
79        }
80        result = reply.readInt32();
81        return result;
82    }
83
84    virtual status_t setBufferCount(int bufferCount)
85    {
86        Parcel data, reply;
87        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
88        data.writeInt32(bufferCount);
89        status_t result =remote()->transact(SET_BUFFER_COUNT, data, &reply);
90        if (result != NO_ERROR) {
91            return result;
92        }
93        result = reply.readInt32();
94        return result;
95    }
96
97    virtual status_t dequeueBuffer(int *buf, sp<Fence>* fence, bool async,
98            uint32_t width, uint32_t height, PixelFormat format,
99            uint32_t usage) {
100        Parcel data, reply;
101        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
102        data.writeInt32(static_cast<int32_t>(async));
103        data.writeUint32(width);
104        data.writeUint32(height);
105        data.writeInt32(static_cast<int32_t>(format));
106        data.writeUint32(usage);
107        status_t result = remote()->transact(DEQUEUE_BUFFER, data, &reply);
108        if (result != NO_ERROR) {
109            return result;
110        }
111        *buf = reply.readInt32();
112        bool nonNull = reply.readInt32();
113        if (nonNull) {
114            *fence = new Fence();
115            reply.read(**fence);
116        }
117        result = reply.readInt32();
118        return result;
119    }
120
121    virtual status_t detachBuffer(int slot) {
122        Parcel data, reply;
123        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
124        data.writeInt32(slot);
125        status_t result = remote()->transact(DETACH_BUFFER, data, &reply);
126        if (result != NO_ERROR) {
127            return result;
128        }
129        result = reply.readInt32();
130        return result;
131    }
132
133    virtual status_t detachNextBuffer(sp<GraphicBuffer>* outBuffer,
134            sp<Fence>* outFence) {
135        if (outBuffer == NULL) {
136            ALOGE("detachNextBuffer: outBuffer must not be NULL");
137            return BAD_VALUE;
138        } else if (outFence == NULL) {
139            ALOGE("detachNextBuffer: outFence must not be NULL");
140            return BAD_VALUE;
141        }
142        Parcel data, reply;
143        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
144        status_t result = remote()->transact(DETACH_NEXT_BUFFER, data, &reply);
145        if (result != NO_ERROR) {
146            return result;
147        }
148        result = reply.readInt32();
149        if (result == NO_ERROR) {
150            bool nonNull = reply.readInt32();
151            if (nonNull) {
152                *outBuffer = new GraphicBuffer;
153                reply.read(**outBuffer);
154            }
155            nonNull = reply.readInt32();
156            if (nonNull) {
157                *outFence = new Fence;
158                reply.read(**outFence);
159            }
160        }
161        return result;
162    }
163
164    virtual status_t attachBuffer(int* slot, const sp<GraphicBuffer>& buffer) {
165        Parcel data, reply;
166        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
167        data.write(*buffer.get());
168        status_t result = remote()->transact(ATTACH_BUFFER, data, &reply);
169        if (result != NO_ERROR) {
170            return result;
171        }
172        *slot = reply.readInt32();
173        result = reply.readInt32();
174        return result;
175    }
176
177    virtual status_t queueBuffer(int buf,
178            const QueueBufferInput& input, QueueBufferOutput* output) {
179        Parcel data, reply;
180        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
181        data.writeInt32(buf);
182        data.write(input);
183        status_t result = remote()->transact(QUEUE_BUFFER, data, &reply);
184        if (result != NO_ERROR) {
185            return result;
186        }
187        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
188        result = reply.readInt32();
189        return result;
190    }
191
192    virtual void cancelBuffer(int buf, const sp<Fence>& fence) {
193        Parcel data, reply;
194        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
195        data.writeInt32(buf);
196        data.write(*fence.get());
197        remote()->transact(CANCEL_BUFFER, data, &reply);
198    }
199
200    virtual int query(int what, int* value) {
201        Parcel data, reply;
202        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
203        data.writeInt32(what);
204        status_t result = remote()->transact(QUERY, data, &reply);
205        if (result != NO_ERROR) {
206            return result;
207        }
208        value[0] = reply.readInt32();
209        result = reply.readInt32();
210        return result;
211    }
212
213    virtual status_t connect(const sp<IProducerListener>& listener,
214            int api, bool producerControlledByApp, QueueBufferOutput* output) {
215        Parcel data, reply;
216        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
217        if (listener != NULL) {
218            data.writeInt32(1);
219            data.writeStrongBinder(IInterface::asBinder(listener));
220        } else {
221            data.writeInt32(0);
222        }
223        data.writeInt32(api);
224        data.writeInt32(producerControlledByApp);
225        status_t result = remote()->transact(CONNECT, data, &reply);
226        if (result != NO_ERROR) {
227            return result;
228        }
229        memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
230        result = reply.readInt32();
231        return result;
232    }
233
234    virtual status_t disconnect(int api) {
235        Parcel data, reply;
236        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
237        data.writeInt32(api);
238        status_t result =remote()->transact(DISCONNECT, data, &reply);
239        if (result != NO_ERROR) {
240            return result;
241        }
242        result = reply.readInt32();
243        return result;
244    }
245
246    virtual status_t setSidebandStream(const sp<NativeHandle>& stream) {
247        Parcel data, reply;
248        status_t result;
249        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
250        if (stream.get()) {
251            data.writeInt32(true);
252            data.writeNativeHandle(stream->handle());
253        } else {
254            data.writeInt32(false);
255        }
256        if ((result = remote()->transact(SET_SIDEBAND_STREAM, data, &reply)) == NO_ERROR) {
257            result = reply.readInt32();
258        }
259        return result;
260    }
261
262    virtual void allocateBuffers(bool async, uint32_t width, uint32_t height,
263            PixelFormat format, uint32_t usage) {
264        Parcel data, reply;
265        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
266        data.writeInt32(static_cast<int32_t>(async));
267        data.writeUint32(width);
268        data.writeUint32(height);
269        data.writeInt32(static_cast<int32_t>(format));
270        data.writeUint32(usage);
271        status_t result = remote()->transact(ALLOCATE_BUFFERS, data, &reply);
272        if (result != NO_ERROR) {
273            ALOGE("allocateBuffers failed to transact: %d", result);
274        }
275    }
276
277    virtual status_t allowAllocation(bool allow) {
278        Parcel data, reply;
279        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
280        data.writeInt32(static_cast<int32_t>(allow));
281        status_t result = remote()->transact(ALLOW_ALLOCATION, data, &reply);
282        if (result != NO_ERROR) {
283            return result;
284        }
285        result = reply.readInt32();
286        return result;
287    }
288
289    virtual status_t setGenerationNumber(uint32_t generationNumber) {
290        Parcel data, reply;
291        data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
292        data.writeUint32(generationNumber);
293        status_t result = remote()->transact(SET_GENERATION_NUMBER, data, &reply);
294        if (result == NO_ERROR) {
295            result = reply.readInt32();
296        }
297        return result;
298    }
299};
300
301// Out-of-line virtual method definition to trigger vtable emission in this
302// translation unit (see clang warning -Wweak-vtables)
303BpGraphicBufferProducer::~BpGraphicBufferProducer() {}
304
305IMPLEMENT_META_INTERFACE(GraphicBufferProducer, "android.gui.IGraphicBufferProducer");
306
307// ----------------------------------------------------------------------
308
309status_t BnGraphicBufferProducer::onTransact(
310    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
311{
312    switch(code) {
313        case REQUEST_BUFFER: {
314            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
315            int bufferIdx   = data.readInt32();
316            sp<GraphicBuffer> buffer;
317            int result = requestBuffer(bufferIdx, &buffer);
318            reply->writeInt32(buffer != 0);
319            if (buffer != 0) {
320                reply->write(*buffer);
321            }
322            reply->writeInt32(result);
323            return NO_ERROR;
324        }
325        case SET_BUFFER_COUNT: {
326            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
327            int bufferCount = data.readInt32();
328            int result = setBufferCount(bufferCount);
329            reply->writeInt32(result);
330            return NO_ERROR;
331        }
332        case DEQUEUE_BUFFER: {
333            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
334            bool async = static_cast<bool>(data.readInt32());
335            uint32_t width = data.readUint32();
336            uint32_t height = data.readUint32();
337            PixelFormat format = static_cast<PixelFormat>(data.readInt32());
338            uint32_t usage = data.readUint32();
339            int buf;
340            sp<Fence> fence;
341            int result = dequeueBuffer(&buf, &fence, async, width, height,
342                    format, usage);
343            reply->writeInt32(buf);
344            reply->writeInt32(fence != NULL);
345            if (fence != NULL) {
346                reply->write(*fence);
347            }
348            reply->writeInt32(result);
349            return NO_ERROR;
350        }
351        case DETACH_BUFFER: {
352            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
353            int slot = data.readInt32();
354            int result = detachBuffer(slot);
355            reply->writeInt32(result);
356            return NO_ERROR;
357        }
358        case DETACH_NEXT_BUFFER: {
359            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
360            sp<GraphicBuffer> buffer;
361            sp<Fence> fence;
362            int32_t result = detachNextBuffer(&buffer, &fence);
363            reply->writeInt32(result);
364            if (result == NO_ERROR) {
365                reply->writeInt32(buffer != NULL);
366                if (buffer != NULL) {
367                    reply->write(*buffer);
368                }
369                reply->writeInt32(fence != NULL);
370                if (fence != NULL) {
371                    reply->write(*fence);
372                }
373            }
374            return NO_ERROR;
375        }
376        case ATTACH_BUFFER: {
377            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
378            sp<GraphicBuffer> buffer = new GraphicBuffer();
379            data.read(*buffer.get());
380            int slot;
381            int result = attachBuffer(&slot, buffer);
382            reply->writeInt32(slot);
383            reply->writeInt32(result);
384            return NO_ERROR;
385        }
386        case QUEUE_BUFFER: {
387            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
388            int buf = data.readInt32();
389            QueueBufferInput input(data);
390            QueueBufferOutput* const output =
391                    reinterpret_cast<QueueBufferOutput *>(
392                            reply->writeInplace(sizeof(QueueBufferOutput)));
393            status_t result = queueBuffer(buf, input, output);
394            reply->writeInt32(result);
395            return NO_ERROR;
396        }
397        case CANCEL_BUFFER: {
398            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
399            int buf = data.readInt32();
400            sp<Fence> fence = new Fence();
401            data.read(*fence.get());
402            cancelBuffer(buf, fence);
403            return NO_ERROR;
404        }
405        case QUERY: {
406            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
407            int value;
408            int what = data.readInt32();
409            int res = query(what, &value);
410            reply->writeInt32(value);
411            reply->writeInt32(res);
412            return NO_ERROR;
413        }
414        case CONNECT: {
415            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
416            sp<IProducerListener> listener;
417            if (data.readInt32() == 1) {
418                listener = IProducerListener::asInterface(data.readStrongBinder());
419            }
420            int api = data.readInt32();
421            bool producerControlledByApp = data.readInt32();
422            QueueBufferOutput* const output =
423                    reinterpret_cast<QueueBufferOutput *>(
424                            reply->writeInplace(sizeof(QueueBufferOutput)));
425            status_t res = connect(listener, api, producerControlledByApp, output);
426            reply->writeInt32(res);
427            return NO_ERROR;
428        }
429        case DISCONNECT: {
430            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
431            int api = data.readInt32();
432            status_t res = disconnect(api);
433            reply->writeInt32(res);
434            return NO_ERROR;
435        }
436        case SET_SIDEBAND_STREAM: {
437            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
438            sp<NativeHandle> stream;
439            if (data.readInt32()) {
440                stream = NativeHandle::create(data.readNativeHandle(), true);
441            }
442            status_t result = setSidebandStream(stream);
443            reply->writeInt32(result);
444            return NO_ERROR;
445        }
446        case ALLOCATE_BUFFERS: {
447            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
448            bool async = static_cast<bool>(data.readInt32());
449            uint32_t width = data.readUint32();
450            uint32_t height = data.readUint32();
451            PixelFormat format = static_cast<PixelFormat>(data.readInt32());
452            uint32_t usage = data.readUint32();
453            allocateBuffers(async, width, height, format, usage);
454            return NO_ERROR;
455        }
456        case ALLOW_ALLOCATION: {
457            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
458            bool allow = static_cast<bool>(data.readInt32());
459            status_t result = allowAllocation(allow);
460            reply->writeInt32(result);
461            return NO_ERROR;
462        }
463        case SET_GENERATION_NUMBER: {
464            CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
465            uint32_t generationNumber = data.readUint32();
466            status_t result = setGenerationNumber(generationNumber);
467            reply->writeInt32(result);
468            return NO_ERROR;
469        }
470    }
471    return BBinder::onTransact(code, data, reply, flags);
472}
473
474// ----------------------------------------------------------------------------
475
476IGraphicBufferProducer::QueueBufferInput::QueueBufferInput(const Parcel& parcel) {
477    parcel.read(*this);
478}
479
480size_t IGraphicBufferProducer::QueueBufferInput::getFlattenedSize() const {
481    return sizeof(timestamp)
482         + sizeof(isAutoTimestamp)
483         + sizeof(dataSpace)
484         + sizeof(crop)
485         + sizeof(scalingMode)
486         + sizeof(transform)
487         + sizeof(stickyTransform)
488         + sizeof(async)
489         + fence->getFlattenedSize()
490         + surfaceDamage.getFlattenedSize();
491}
492
493size_t IGraphicBufferProducer::QueueBufferInput::getFdCount() const {
494    return fence->getFdCount();
495}
496
497status_t IGraphicBufferProducer::QueueBufferInput::flatten(
498        void*& buffer, size_t& size, int*& fds, size_t& count) const
499{
500    if (size < getFlattenedSize()) {
501        return NO_MEMORY;
502    }
503    FlattenableUtils::write(buffer, size, timestamp);
504    FlattenableUtils::write(buffer, size, isAutoTimestamp);
505    FlattenableUtils::write(buffer, size, dataSpace);
506    FlattenableUtils::write(buffer, size, crop);
507    FlattenableUtils::write(buffer, size, scalingMode);
508    FlattenableUtils::write(buffer, size, transform);
509    FlattenableUtils::write(buffer, size, stickyTransform);
510    FlattenableUtils::write(buffer, size, async);
511    status_t result = fence->flatten(buffer, size, fds, count);
512    if (result != NO_ERROR) {
513        return result;
514    }
515    return surfaceDamage.flatten(buffer, size);
516}
517
518status_t IGraphicBufferProducer::QueueBufferInput::unflatten(
519        void const*& buffer, size_t& size, int const*& fds, size_t& count)
520{
521    size_t minNeeded =
522              sizeof(timestamp)
523            + sizeof(isAutoTimestamp)
524            + sizeof(dataSpace)
525            + sizeof(crop)
526            + sizeof(scalingMode)
527            + sizeof(transform)
528            + sizeof(stickyTransform)
529            + sizeof(async);
530
531    if (size < minNeeded) {
532        return NO_MEMORY;
533    }
534
535    FlattenableUtils::read(buffer, size, timestamp);
536    FlattenableUtils::read(buffer, size, isAutoTimestamp);
537    FlattenableUtils::read(buffer, size, dataSpace);
538    FlattenableUtils::read(buffer, size, crop);
539    FlattenableUtils::read(buffer, size, scalingMode);
540    FlattenableUtils::read(buffer, size, transform);
541    FlattenableUtils::read(buffer, size, stickyTransform);
542    FlattenableUtils::read(buffer, size, async);
543
544    fence = new Fence();
545    status_t result = fence->unflatten(buffer, size, fds, count);
546    if (result != NO_ERROR) {
547        return result;
548    }
549    return surfaceDamage.unflatten(buffer, size);
550}
551
552}; // namespace android
553