libs/gui/IGraphicBufferProducer.cpp

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