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Diffstat (limited to 'camera/IProCameraUser.cpp')
| -rw-r--r-- | camera/IProCameraUser.cpp | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/camera/IProCameraUser.cpp b/camera/IProCameraUser.cpp new file mode 100644 index 0000000..4c4dec3 --- /dev/null +++ b/camera/IProCameraUser.cpp @@ -0,0 +1,426 @@ +/* +** +** Copyright 2013, The Android Open Source Project +** +** Licensed under the Apache License, Version 2.0 (the "License"); +** you may not use this file except in compliance with the License. +** You may obtain a copy of the License at +** +** http://www.apache.org/licenses/LICENSE-2.0 +** +** Unless required by applicable law or agreed to in writing, software +** distributed under the License is distributed on an "AS IS" BASIS, +** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +** See the License for the specific language governing permissions and +** limitations under the License. +*/ + +//#define LOG_NDEBUG 0 +#define LOG_TAG "IProCameraUser" +#include <utils/Log.h> +#include <stdint.h> +#include <sys/types.h> +#include <binder/Parcel.h> +#include <camera/IProCameraUser.h> +#include <gui/IGraphicBufferProducer.h> +#include <gui/Surface.h> +#include <system/camera_metadata.h> + +namespace android { + +typedef Parcel::WritableBlob WritableBlob; +typedef Parcel::ReadableBlob ReadableBlob; + +enum { + DISCONNECT = IBinder::FIRST_CALL_TRANSACTION, + CONNECT, + EXCLUSIVE_TRY_LOCK, + EXCLUSIVE_LOCK, + EXCLUSIVE_UNLOCK, + HAS_EXCLUSIVE_LOCK, + SUBMIT_REQUEST, + CANCEL_REQUEST, + DELETE_STREAM, + CREATE_STREAM, + CREATE_DEFAULT_REQUEST, + GET_CAMERA_INFO, +}; + +/** + * Caller becomes the owner of the new metadata + * 'const Parcel' doesnt prevent us from calling the read functions. + * which is interesting since it changes the internal state + * + * NULL can be returned when no metadata was sent, OR if there was an issue + * unpacking the serialized data (i.e. bad parcel or invalid structure). + */ +void readMetadata(const Parcel& data, camera_metadata_t** out) { + + status_t err = OK; + + camera_metadata_t* metadata = NULL; + + if (out) { + *out = NULL; + } + + // arg0 = metadataSize (int32) + int32_t metadataSizeTmp = -1; + if ((err = data.readInt32(&metadataSizeTmp)) != OK) { + ALOGE("%s: Failed to read metadata size (error %d %s)", + __FUNCTION__, err, strerror(-err)); + return; + } + const size_t metadataSize = static_cast<size_t>(metadataSizeTmp); + + if (metadataSize == 0) { + return; + } + + // NOTE: this doesn't make sense to me. shouldnt the blob + // know how big it is? why do we have to specify the size + // to Parcel::readBlob ? + + ReadableBlob blob; + // arg1 = metadata (blob) + do { + if ((err = data.readBlob(metadataSize, &blob)) != OK) { + ALOGE("%s: Failed to read metadata blob (sized %d). Possible " + " serialization bug. Error %d %s", + __FUNCTION__, metadataSize, err, strerror(-err)); + break; + } + const camera_metadata_t* tmp = + reinterpret_cast<const camera_metadata_t*>(blob.data()); + + metadata = allocate_copy_camera_metadata_checked(tmp, metadataSize); + } while(0); + blob.release(); + + if (out) { + *out = metadata; + } else if (metadata != NULL) { + free_camera_metadata(metadata); + } +} + +/** + * Caller retains ownership of metadata + * - Write 2 (int32 + blob) args in the current position + */ +void writeMetadata(Parcel& data, camera_metadata_t* metadata) { + // arg0 = metadataSize (int32) + + if (metadata == NULL) { + data.writeInt32(0); + return; + } + + const size_t metadataSize = get_camera_metadata_compact_size(metadata); + data.writeInt32(static_cast<int32_t>(metadataSize)); + + // arg1 = metadata (blob) + WritableBlob blob; + { + data.writeBlob(metadataSize, &blob); + copy_camera_metadata(blob.data(), metadataSize, metadata); + + IF_ALOGV() { + if (validate_camera_metadata_structure( + (const camera_metadata_t*)blob.data(), + &metadataSize) != OK) { + ALOGV("%s: Failed to validate metadata %p after writing blob", + __FUNCTION__, blob.data()); + } else { + ALOGV("%s: Metadata written to blob. Validation success", + __FUNCTION__); + } + } + + // Not too big of a problem since receiving side does hard validation + if (validate_camera_metadata_structure(metadata, &metadataSize) != OK) { + ALOGW("%s: Failed to validate metadata %p before writing blob", + __FUNCTION__, metadata); + } + + } + blob.release(); +} + +class BpProCameraUser: public BpInterface<IProCameraUser> +{ +public: + BpProCameraUser(const sp<IBinder>& impl) + : BpInterface<IProCameraUser>(impl) + { + } + + // disconnect from camera service + void disconnect() + { + ALOGV("disconnect"); + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + remote()->transact(DISCONNECT, data, &reply); + } + + virtual status_t connect(const sp<IProCameraCallbacks>& cameraClient) + { + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + data.writeStrongBinder(cameraClient->asBinder()); + remote()->transact(CONNECT, data, &reply); + return reply.readInt32(); + } + + /* Shared ProCameraUser */ + + virtual status_t exclusiveTryLock() + { + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + remote()->transact(EXCLUSIVE_TRY_LOCK, data, &reply); + return reply.readInt32(); + } + virtual status_t exclusiveLock() + { + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + remote()->transact(EXCLUSIVE_LOCK, data, &reply); + return reply.readInt32(); + } + + virtual status_t exclusiveUnlock() + { + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + remote()->transact(EXCLUSIVE_UNLOCK, data, &reply); + return reply.readInt32(); + } + + virtual bool hasExclusiveLock() + { + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + remote()->transact(HAS_EXCLUSIVE_LOCK, data, &reply); + return !!reply.readInt32(); + } + + virtual int submitRequest(camera_metadata_t* metadata, bool streaming) + { + + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + + // arg0+arg1 + writeMetadata(data, metadata); + + // arg2 = streaming (bool) + data.writeInt32(streaming); + + remote()->transact(SUBMIT_REQUEST, data, &reply); + return reply.readInt32(); + } + + virtual status_t cancelRequest(int requestId) + { + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + data.writeInt32(requestId); + + remote()->transact(CANCEL_REQUEST, data, &reply); + return reply.readInt32(); + } + + virtual status_t deleteStream(int streamId) + { + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + data.writeInt32(streamId); + + remote()->transact(DELETE_STREAM, data, &reply); + return reply.readInt32(); + } + + virtual status_t createStream(int width, int height, int format, + const sp<IGraphicBufferProducer>& bufferProducer, + /*out*/ + int* streamId) + { + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + data.writeInt32(width); + data.writeInt32(height); + data.writeInt32(format); + + sp<IBinder> b(bufferProducer->asBinder()); + data.writeStrongBinder(b); + + remote()->transact(CREATE_STREAM, data, &reply); + + int sId = reply.readInt32(); + if (streamId) { + *streamId = sId; + } + return reply.readInt32(); + } + + // Create a request object from a template. + virtual status_t createDefaultRequest(int templateId, + /*out*/ + camera_metadata** request) + { + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + data.writeInt32(templateId); + remote()->transact(CREATE_DEFAULT_REQUEST, data, &reply); + readMetadata(reply, /*out*/request); + return reply.readInt32(); + } + + + virtual status_t getCameraInfo(int cameraId, camera_metadata** info) + { + Parcel data, reply; + data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor()); + data.writeInt32(cameraId); + remote()->transact(GET_CAMERA_INFO, data, &reply); + readMetadata(reply, /*out*/info); + return reply.readInt32(); + } + + +private: + + +}; + +IMPLEMENT_META_INTERFACE(ProCameraUser, "android.hardware.IProCameraUser"); + +// ---------------------------------------------------------------------- + +status_t BnProCameraUser::onTransact( + uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) +{ + switch(code) { + case DISCONNECT: { + ALOGV("DISCONNECT"); + CHECK_INTERFACE(IProCameraUser, data, reply); + disconnect(); + return NO_ERROR; + } break; + case CONNECT: { + CHECK_INTERFACE(IProCameraUser, data, reply); + sp<IProCameraCallbacks> cameraClient = + interface_cast<IProCameraCallbacks>(data.readStrongBinder()); + reply->writeInt32(connect(cameraClient)); + return NO_ERROR; + } break; + + /* Shared ProCameraUser */ + case EXCLUSIVE_TRY_LOCK: { + CHECK_INTERFACE(IProCameraUser, data, reply); + reply->writeInt32(exclusiveTryLock()); + return NO_ERROR; + } break; + case EXCLUSIVE_LOCK: { + CHECK_INTERFACE(IProCameraUser, data, reply); + reply->writeInt32(exclusiveLock()); + return NO_ERROR; + } break; + case EXCLUSIVE_UNLOCK: { + CHECK_INTERFACE(IProCameraUser, data, reply); + reply->writeInt32(exclusiveUnlock()); + return NO_ERROR; + } break; + case HAS_EXCLUSIVE_LOCK: { + CHECK_INTERFACE(IProCameraUser, data, reply); + reply->writeInt32(hasExclusiveLock()); + return NO_ERROR; + } break; + case SUBMIT_REQUEST: { + CHECK_INTERFACE(IProCameraUser, data, reply); + camera_metadata_t* metadata; + readMetadata(data, /*out*/&metadata); + + // arg2 = streaming (bool) + bool streaming = data.readInt32(); + + // return code: requestId (int32) + reply->writeInt32(submitRequest(metadata, streaming)); + + return NO_ERROR; + } break; + case CANCEL_REQUEST: { + CHECK_INTERFACE(IProCameraUser, data, reply); + int requestId = data.readInt32(); + reply->writeInt32(cancelRequest(requestId)); + return NO_ERROR; + } break; + case DELETE_STREAM: { + CHECK_INTERFACE(IProCameraUser, data, reply); + int streamId = data.readInt32(); + reply->writeInt32(deleteStream(streamId)); + return NO_ERROR; + } break; + case CREATE_STREAM: { + CHECK_INTERFACE(IProCameraUser, data, reply); + int width, height, format; + + width = data.readInt32(); + height = data.readInt32(); + format = data.readInt32(); + + sp<IGraphicBufferProducer> bp = + interface_cast<IGraphicBufferProducer>(data.readStrongBinder()); + + int streamId = -1; + status_t ret; + ret = createStream(width, height, format, bp, &streamId); + + reply->writeInt32(streamId); + reply->writeInt32(ret); + + return NO_ERROR; + } break; + + case CREATE_DEFAULT_REQUEST: { + CHECK_INTERFACE(IProCameraUser, data, reply); + + int templateId = data.readInt32(); + + camera_metadata_t* request = NULL; + status_t ret; + ret = createDefaultRequest(templateId, &request); + + writeMetadata(*reply, request); + reply->writeInt32(ret); + + free_camera_metadata(request); + + return NO_ERROR; + } break; + case GET_CAMERA_INFO: { + CHECK_INTERFACE(IProCameraUser, data, reply); + + int cameraId = data.readInt32(); + + camera_metadata_t* info = NULL; + status_t ret; + ret = getCameraInfo(cameraId, &info); + + writeMetadata(*reply, info); + reply->writeInt32(ret); + + free_camera_metadata(info); + + return NO_ERROR; + } break; + default: + return BBinder::onTransact(code, data, reply, flags); + } +} + +// ---------------------------------------------------------------------------- + +}; // namespace android |