keunyoung | 8a94683 | 2013-03-08 12:28:03 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 | /* |
| 18 | * Contains implementation of a class EmulatedQemuCameraDevice that encapsulates |
| 19 | * an emulated camera device connected to the host. |
| 20 | */ |
| 21 | |
| 22 | #define LOG_NDEBUG 0 |
| 23 | #define LOG_TAG "EmulatedCamera_QemuDevice" |
| 24 | #include <cutils/log.h> |
| 25 | #include "EmulatedQemuCamera.h" |
| 26 | #include "EmulatedQemuCameraDevice.h" |
| 27 | |
| 28 | namespace android { |
| 29 | |
| 30 | EmulatedQemuCameraDevice::EmulatedQemuCameraDevice(EmulatedQemuCamera* camera_hal) |
| 31 | : EmulatedCameraDevice(camera_hal), |
| 32 | mQemuClient(), |
| 33 | mPreviewFrame(NULL) |
| 34 | { |
| 35 | } |
| 36 | |
| 37 | EmulatedQemuCameraDevice::~EmulatedQemuCameraDevice() |
| 38 | { |
| 39 | if (mPreviewFrame != NULL) { |
| 40 | delete[] mPreviewFrame; |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | /**************************************************************************** |
| 45 | * Public API |
| 46 | ***************************************************************************/ |
| 47 | |
| 48 | status_t EmulatedQemuCameraDevice::Initialize(const char* device_name) |
| 49 | { |
| 50 | /* Connect to the service. */ |
| 51 | char connect_str[256]; |
| 52 | snprintf(connect_str, sizeof(connect_str), "name=%s", device_name); |
| 53 | status_t res = mQemuClient.connectClient(connect_str); |
| 54 | if (res != NO_ERROR) { |
| 55 | return res; |
| 56 | } |
| 57 | |
| 58 | /* Initialize base class. */ |
| 59 | res = EmulatedCameraDevice::Initialize(); |
| 60 | if (res == NO_ERROR) { |
| 61 | ALOGV("%s: Connected to the emulated camera service '%s'", |
| 62 | __FUNCTION__, device_name); |
| 63 | mDeviceName = device_name; |
| 64 | } else { |
| 65 | mQemuClient.queryDisconnect(); |
| 66 | } |
| 67 | |
| 68 | return res; |
| 69 | } |
| 70 | |
| 71 | /**************************************************************************** |
| 72 | * Emulated camera device abstract interface implementation. |
| 73 | ***************************************************************************/ |
| 74 | |
| 75 | status_t EmulatedQemuCameraDevice::connectDevice() |
| 76 | { |
| 77 | ALOGV("%s", __FUNCTION__); |
| 78 | |
| 79 | Mutex::Autolock locker(&mObjectLock); |
| 80 | if (!isInitialized()) { |
| 81 | ALOGE("%s: Qemu camera device is not initialized.", __FUNCTION__); |
| 82 | return EINVAL; |
| 83 | } |
| 84 | if (isConnected()) { |
| 85 | ALOGW("%s: Qemu camera device '%s' is already connected.", |
| 86 | __FUNCTION__, (const char*)mDeviceName); |
| 87 | return NO_ERROR; |
| 88 | } |
| 89 | |
| 90 | /* Connect to the camera device via emulator. */ |
| 91 | const status_t res = mQemuClient.queryConnect(); |
| 92 | if (res == NO_ERROR) { |
| 93 | ALOGV("%s: Connected to device '%s'", |
| 94 | __FUNCTION__, (const char*)mDeviceName); |
| 95 | mState = ECDS_CONNECTED; |
| 96 | } else { |
| 97 | ALOGE("%s: Connection to device '%s' failed", |
| 98 | __FUNCTION__, (const char*)mDeviceName); |
| 99 | } |
| 100 | |
| 101 | return res; |
| 102 | } |
| 103 | |
| 104 | status_t EmulatedQemuCameraDevice::disconnectDevice() |
| 105 | { |
| 106 | ALOGV("%s", __FUNCTION__); |
| 107 | |
| 108 | Mutex::Autolock locker(&mObjectLock); |
| 109 | if (!isConnected()) { |
| 110 | ALOGW("%s: Qemu camera device '%s' is already disconnected.", |
| 111 | __FUNCTION__, (const char*)mDeviceName); |
| 112 | return NO_ERROR; |
| 113 | } |
| 114 | if (isStarted()) { |
| 115 | ALOGE("%s: Cannot disconnect from the started device '%s.", |
| 116 | __FUNCTION__, (const char*)mDeviceName); |
| 117 | return EINVAL; |
| 118 | } |
| 119 | |
| 120 | /* Disconnect from the camera device via emulator. */ |
| 121 | const status_t res = mQemuClient.queryDisconnect(); |
| 122 | if (res == NO_ERROR) { |
| 123 | ALOGV("%s: Disonnected from device '%s'", |
| 124 | __FUNCTION__, (const char*)mDeviceName); |
| 125 | mState = ECDS_INITIALIZED; |
| 126 | } else { |
| 127 | ALOGE("%s: Disconnection from device '%s' failed", |
| 128 | __FUNCTION__, (const char*)mDeviceName); |
| 129 | } |
| 130 | |
| 131 | return res; |
| 132 | } |
| 133 | |
| 134 | status_t EmulatedQemuCameraDevice::startDevice(int width, |
| 135 | int height, |
| 136 | uint32_t pix_fmt) |
| 137 | { |
| 138 | ALOGV("%s", __FUNCTION__); |
| 139 | |
| 140 | Mutex::Autolock locker(&mObjectLock); |
| 141 | if (!isConnected()) { |
| 142 | ALOGE("%s: Qemu camera device '%s' is not connected.", |
| 143 | __FUNCTION__, (const char*)mDeviceName); |
| 144 | return EINVAL; |
| 145 | } |
| 146 | if (isStarted()) { |
| 147 | ALOGW("%s: Qemu camera device '%s' is already started.", |
| 148 | __FUNCTION__, (const char*)mDeviceName); |
| 149 | return NO_ERROR; |
| 150 | } |
| 151 | |
| 152 | status_t res = EmulatedCameraDevice::commonStartDevice(width, height, pix_fmt); |
| 153 | if (res != NO_ERROR) { |
| 154 | ALOGE("%s: commonStartDevice failed", __FUNCTION__); |
| 155 | return res; |
| 156 | } |
| 157 | |
| 158 | /* Allocate preview frame buffer. */ |
| 159 | /* TODO: Watch out for preview format changes! At this point we implement |
| 160 | * RGB32 only.*/ |
| 161 | mPreviewFrame = new uint32_t[mTotalPixels]; |
| 162 | if (mPreviewFrame == NULL) { |
| 163 | ALOGE("%s: Unable to allocate %d bytes for preview frame", |
| 164 | __FUNCTION__, mTotalPixels); |
| 165 | return ENOMEM; |
| 166 | } |
| 167 | |
| 168 | /* Start the actual camera device. */ |
| 169 | res = mQemuClient.queryStart(mPixelFormat, mFrameWidth, mFrameHeight); |
| 170 | if (res == NO_ERROR) { |
| 171 | ALOGV("%s: Qemu camera device '%s' is started for %.4s[%dx%d] frames", |
| 172 | __FUNCTION__, (const char*)mDeviceName, |
| 173 | reinterpret_cast<const char*>(&mPixelFormat), |
| 174 | mFrameWidth, mFrameHeight); |
| 175 | mState = ECDS_STARTED; |
| 176 | } else { |
| 177 | ALOGE("%s: Unable to start device '%s' for %.4s[%dx%d] frames", |
| 178 | __FUNCTION__, (const char*)mDeviceName, |
| 179 | reinterpret_cast<const char*>(&pix_fmt), width, height); |
| 180 | } |
| 181 | |
| 182 | return res; |
| 183 | } |
| 184 | |
| 185 | status_t EmulatedQemuCameraDevice::stopDevice() |
| 186 | { |
| 187 | ALOGV("%s", __FUNCTION__); |
| 188 | |
| 189 | Mutex::Autolock locker(&mObjectLock); |
| 190 | if (!isStarted()) { |
| 191 | ALOGW("%s: Qemu camera device '%s' is not started.", |
| 192 | __FUNCTION__, (const char*)mDeviceName); |
| 193 | return NO_ERROR; |
| 194 | } |
| 195 | |
| 196 | /* Stop the actual camera device. */ |
| 197 | status_t res = mQemuClient.queryStop(); |
| 198 | if (res == NO_ERROR) { |
| 199 | if (mPreviewFrame == NULL) { |
| 200 | delete[] mPreviewFrame; |
| 201 | mPreviewFrame = NULL; |
| 202 | } |
| 203 | EmulatedCameraDevice::commonStopDevice(); |
| 204 | mState = ECDS_CONNECTED; |
| 205 | ALOGV("%s: Qemu camera device '%s' is stopped", |
| 206 | __FUNCTION__, (const char*)mDeviceName); |
| 207 | } else { |
| 208 | ALOGE("%s: Unable to stop device '%s'", |
| 209 | __FUNCTION__, (const char*)mDeviceName); |
| 210 | } |
| 211 | |
| 212 | return res; |
| 213 | } |
| 214 | |
| 215 | /**************************************************************************** |
| 216 | * EmulatedCameraDevice virtual overrides |
| 217 | ***************************************************************************/ |
| 218 | |
| 219 | status_t EmulatedQemuCameraDevice::getCurrentPreviewFrame(void* buffer) |
| 220 | { |
| 221 | ALOGW_IF(mPreviewFrame == NULL, "%s: No preview frame", __FUNCTION__); |
| 222 | if (mPreviewFrame != NULL) { |
| 223 | memcpy(buffer, mPreviewFrame, mTotalPixels * 4); |
| 224 | return 0; |
| 225 | } else { |
| 226 | return EmulatedCameraDevice::getCurrentPreviewFrame(buffer); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | /**************************************************************************** |
| 231 | * Worker thread management overrides. |
| 232 | ***************************************************************************/ |
| 233 | |
| 234 | bool EmulatedQemuCameraDevice::inWorkerThread() |
| 235 | { |
| 236 | /* Wait till FPS timeout expires, or thread exit message is received. */ |
| 237 | WorkerThread::SelectRes res = |
| 238 | getWorkerThread()->Select(-1, 1000000 / mEmulatedFPS); |
| 239 | if (res == WorkerThread::EXIT_THREAD) { |
| 240 | ALOGV("%s: Worker thread has been terminated.", __FUNCTION__); |
| 241 | return false; |
| 242 | } |
| 243 | |
| 244 | /* Query frames from the service. */ |
| 245 | status_t query_res = mQemuClient.queryFrame(mCurrentFrame, mPreviewFrame, |
| 246 | mFrameBufferSize, |
| 247 | mTotalPixels * 4, |
| 248 | mWhiteBalanceScale[0], |
| 249 | mWhiteBalanceScale[1], |
| 250 | mWhiteBalanceScale[2], |
| 251 | mExposureCompensation); |
| 252 | if (query_res == NO_ERROR) { |
| 253 | /* Timestamp the current frame, and notify the camera HAL. */ |
| 254 | mCurFrameTimestamp = systemTime(SYSTEM_TIME_MONOTONIC); |
| 255 | mCameraHAL->onNextFrameAvailable(mCurrentFrame, mCurFrameTimestamp, this); |
| 256 | return true; |
| 257 | } else { |
| 258 | ALOGE("%s: Unable to get current video frame: %s", |
| 259 | __FUNCTION__, strerror(query_res)); |
| 260 | mCameraHAL->onCameraDeviceError(CAMERA_ERROR_SERVER_DIED); |
| 261 | return false; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | }; /* namespace android */ |