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