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     SET_SYNCHRONOUS_MODE,
  41     CONNECT,
  42     DISCONNECT,
  43 };
  44
  45
  46 class BpGraphicBufferProducer : public BpInterface<IGraphicBufferProducer>
  47 {
  48 public:
  49     BpGraphicBufferProducer(const sp<IBinder>& impl)
  50         : BpInterface<IGraphicBufferProducer>(impl)
  51     {
  52     }
  53
  54     virtual status_t requestBuffer(int bufferIdx, sp<GraphicBuffer>* buf) {
  55         Parcel data, reply;
  56         data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
  57         data.writeInt32(bufferIdx);
  58         status_t result =remote()->transact(REQUEST_BUFFER, data, &reply);
  59         if (result != NO_ERROR) {
  60             return result;
  61         }
  62         bool nonNull = reply.readInt32();
  63         if (nonNull) {
  64             *buf = new GraphicBuffer();
  65             reply.read(**buf);
  66         }
  67         result = reply.readInt32();
  68         return result;
  69     }
  70
  71     virtual status_t setBufferCount(int bufferCount)
  72     {
  73         Parcel data, reply;
  74         data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
  75         data.writeInt32(bufferCount);
  76         status_t result =remote()->transact(SET_BUFFER_COUNT, data, &reply);
  77         if (result != NO_ERROR) {
  78             return result;
  79         }
  80         result = reply.readInt32();
  81         return result;
  82     }
  83
  84     virtual status_t dequeueBuffer(int *buf, sp<Fence>* fence,
  85             uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
  86         Parcel data, reply;
  87         data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
  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 fenceWasWritten = reply.readInt32();
  98         if (fenceWasWritten) {
  99             // If the fence was written by the callee, then overwrite the
 100             // caller's fence here.  If it wasn't written then don't touch the
 101             // caller's fence.
 102             *fence = new Fence();
 103             reply.read(*(fence->get()));
 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 setSynchronousMode(bool enabled) {
 146         Parcel data, reply;
 147         data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
 148         data.writeInt32(enabled);
 149         status_t result = remote()->transact(SET_SYNCHRONOUS_MODE, data, &reply);
 150         if (result != NO_ERROR) {
 151             return result;
 152         }
 153         result = reply.readInt32();
 154         return result;
 155     }
 156
 157     virtual status_t connect(int api, QueueBufferOutput* output) {
 158         Parcel data, reply;
 159         data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
 160         data.writeInt32(api);
 161         status_t result = remote()->transact(CONNECT, data, &reply);
 162         if (result != NO_ERROR) {
 163             return result;
 164         }
 165         memcpy(output, reply.readInplace(sizeof(*output)), sizeof(*output));
 166         result = reply.readInt32();
 167         return result;
 168     }
 169
 170     virtual status_t disconnect(int api) {
 171         Parcel data, reply;
 172         data.writeInterfaceToken(IGraphicBufferProducer::getInterfaceDescriptor());
 173         data.writeInt32(api);
 174         status_t result =remote()->transact(DISCONNECT, data, &reply);
 175         if (result != NO_ERROR) {
 176             return result;
 177         }
 178         result = reply.readInt32();
 179         return result;
 180     }
 181 };
 182
 183 IMPLEMENT_META_INTERFACE(GraphicBufferProducer, "android.gui.IGraphicBufferProducer");
 184
 185 // ----------------------------------------------------------------------
 186
 187 status_t BnGraphicBufferProducer::onTransact(
 188     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
 189 {
 190     switch(code) {
 191         case REQUEST_BUFFER: {
 192             CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
 193             int bufferIdx   = data.readInt32();
 194             sp<GraphicBuffer> buffer;
 195             int result = requestBuffer(bufferIdx, &buffer);
 196             reply->writeInt32(buffer != 0);
 197             if (buffer != 0) {
 198                 reply->write(*buffer);
 199             }
 200             reply->writeInt32(result);
 201             return NO_ERROR;
 202         } break;
 203         case SET_BUFFER_COUNT: {
 204             CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
 205             int bufferCount = data.readInt32();
 206             int result = setBufferCount(bufferCount);
 207             reply->writeInt32(result);
 208             return NO_ERROR;
 209         } break;
 210         case DEQUEUE_BUFFER: {
 211             CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
 212             uint32_t w      = data.readInt32();
 213             uint32_t h      = data.readInt32();
 214             uint32_t format = data.readInt32();
 215             uint32_t usage  = data.readInt32();
 216             int buf;
 217             sp<Fence> fence;
 218             int result = dequeueBuffer(&buf, &fence, w, h, format, usage);
 219             reply->writeInt32(buf);
 220             reply->writeInt32(fence != NULL);
 221             if (fence != NULL) {
 222                 reply->write(*fence.get());
 223             }
 224             reply->writeInt32(result);
 225             return NO_ERROR;
 226         } break;
 227         case QUEUE_BUFFER: {
 228             CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
 229             int buf = data.readInt32();
 230             QueueBufferInput input(data);
 231             QueueBufferOutput* const output =
 232                     reinterpret_cast<QueueBufferOutput *>(
 233                             reply->writeInplace(sizeof(QueueBufferOutput)));
 234             status_t result = queueBuffer(buf, input, output);
 235             reply->writeInt32(result);
 236             return NO_ERROR;
 237         } break;
 238         case CANCEL_BUFFER: {
 239             CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
 240             int buf = data.readInt32();
 241             sp<Fence> fence = new Fence();
 242             data.read(*fence.get());
 243             cancelBuffer(buf, fence);
 244             return NO_ERROR;
 245         } break;
 246         case QUERY: {
 247             CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
 248             int value;
 249             int what = data.readInt32();
 250             int res = query(what, &value);
 251             reply->writeInt32(value);
 252             reply->writeInt32(res);
 253             return NO_ERROR;
 254         } break;
 255         case SET_SYNCHRONOUS_MODE: {
 256             CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
 257             bool enabled = data.readInt32();
 258             status_t res = setSynchronousMode(enabled);
 259             reply->writeInt32(res);
 260             return NO_ERROR;
 261         } break;
 262         case CONNECT: {
 263             CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
 264             int api = data.readInt32();
 265             QueueBufferOutput* const output =
 266                     reinterpret_cast<QueueBufferOutput *>(
 267                             reply->writeInplace(sizeof(QueueBufferOutput)));
 268             status_t res = connect(api, output);
 269             reply->writeInt32(res);
 270             return NO_ERROR;
 271         } break;
 272         case DISCONNECT: {
 273             CHECK_INTERFACE(IGraphicBufferProducer, data, reply);
 274             int api = data.readInt32();
 275             status_t res = disconnect(api);
 276             reply->writeInt32(res);
 277             return NO_ERROR;
 278         } break;
 279     }
 280     return BBinder::onTransact(code, data, reply, flags);
 281 }
 282
 283 // ----------------------------------------------------------------------------
 284
 285 IGraphicBufferProducer::QueueBufferInput::QueueBufferInput(const Parcel& parcel) {
 286     parcel.read(*this);
 287 }
 288
 289 size_t IGraphicBufferProducer::QueueBufferInput::getFlattenedSize() const
 290 {
 291     return sizeof(timestamp)
 292          + sizeof(crop)
 293          + sizeof(scalingMode)
 294          + sizeof(transform)
 295          + fence->getFlattenedSize();
 296 }
 297
 298 size_t IGraphicBufferProducer::QueueBufferInput::getFdCount() const
 299 {
 300     return fence->getFdCount();
 301 }
 302
 303 status_t IGraphicBufferProducer::QueueBufferInput::flatten(void* buffer, size_t size,
 304         int fds[], size_t count) const
 305 {
 306     status_t err = NO_ERROR;
 307     char* p = (char*)buffer;
 308     memcpy(p, &timestamp,   sizeof(timestamp));   p += sizeof(timestamp);
 309     memcpy(p, &crop,        sizeof(crop));        p += sizeof(crop);
 310     memcpy(p, &scalingMode, sizeof(scalingMode)); p += sizeof(scalingMode);
 311     memcpy(p, &transform,   sizeof(transform));   p += sizeof(transform);
 312     err = fence->flatten(p, size - (p - (char*)buffer), fds, count);
 313     return err;
 314 }
 315
 316 status_t IGraphicBufferProducer::QueueBufferInput::unflatten(void const* buffer,
 317         size_t size, int fds[], size_t count)
 318 {
 319     status_t err = NO_ERROR;
 320     const char* p = (const char*)buffer;
 321     memcpy(&timestamp,   p, sizeof(timestamp));   p += sizeof(timestamp);
 322     memcpy(&crop,        p, sizeof(crop));        p += sizeof(crop);
 323     memcpy(&scalingMode, p, sizeof(scalingMode)); p += sizeof(scalingMode);
 324     memcpy(&transform,   p, sizeof(transform));   p += sizeof(transform);
 325     fence = new Fence();
 326     err = fence->unflatten(p, size - (p - (const char*)buffer), fds, count);
 327     return err;
 328 }
 329
 330 }; // namespace android