The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | ** |
| 3 | ** Copyright 2008, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #define LOG_TAG "CameraHardwareStub" |
| 19 | #include <utils/Log.h> |
| 20 | |
| 21 | #include "CameraHardwareStub.h" |
| 22 | #include <utils/threads.h> |
| 23 | #include <fcntl.h> |
| 24 | #include <sys/mman.h> |
| 25 | |
| 26 | #include "CannedJpeg.h" |
| 27 | |
| 28 | namespace android { |
| 29 | |
| 30 | CameraHardwareStub::CameraHardwareStub() |
| 31 | : mParameters(), |
| 32 | mPreviewHeap(0), |
| 33 | mRawHeap(0), |
| 34 | mFakeCamera(0), |
| 35 | mPreviewFrameSize(0), |
| 36 | mRawPictureCallback(0), |
| 37 | mJpegPictureCallback(0), |
| 38 | mPictureCallbackCookie(0), |
| 39 | mPreviewCallback(0), |
| 40 | mPreviewCallbackCookie(0), |
| 41 | mAutoFocusCallback(0), |
| 42 | mAutoFocusCallbackCookie(0), |
| 43 | mCurrentPreviewFrame(0) |
| 44 | { |
| 45 | initDefaultParameters(); |
| 46 | } |
| 47 | |
| 48 | void CameraHardwareStub::initDefaultParameters() |
| 49 | { |
| 50 | CameraParameters p; |
| 51 | |
| 52 | p.setPreviewSize(176, 144); |
| 53 | p.setPreviewFrameRate(15); |
| 54 | p.setPreviewFormat("yuv422sp"); |
| 55 | |
| 56 | p.setPictureSize(kCannedJpegWidth, kCannedJpegHeight); |
| 57 | p.setPictureFormat("jpeg"); |
| 58 | |
| 59 | if (setParameters(p) != NO_ERROR) { |
| 60 | LOGE("Failed to set default parameters?!"); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | void CameraHardwareStub::initHeapLocked() |
| 65 | { |
| 66 | // Create raw heap. |
| 67 | int picture_width, picture_height; |
| 68 | mParameters.getPictureSize(&picture_width, &picture_height); |
| 69 | mRawHeap = new MemoryHeapBase(picture_width * 2 * picture_height); |
| 70 | |
| 71 | int preview_width, preview_height; |
| 72 | mParameters.getPreviewSize(&preview_width, &preview_height); |
| 73 | LOGD("initHeapLocked: preview size=%dx%d", preview_width, preview_height); |
| 74 | |
| 75 | // Note that we enforce yuv422 in setParameters(). |
| 76 | int how_big = preview_width * preview_height * 2; |
| 77 | |
| 78 | // If we are being reinitialized to the same size as before, no |
| 79 | // work needs to be done. |
| 80 | if (how_big == mPreviewFrameSize) |
| 81 | return; |
| 82 | |
| 83 | mPreviewFrameSize = how_big; |
| 84 | |
| 85 | // Make a new mmap'ed heap that can be shared across processes. |
| 86 | // use code below to test with pmem |
| 87 | mPreviewHeap = new MemoryHeapBase(mPreviewFrameSize * kBufferCount); |
| 88 | // Make an IMemory for each frame so that we can reuse them in callbacks. |
| 89 | for (int i = 0; i < kBufferCount; i++) { |
| 90 | mBuffers[i] = new MemoryBase(mPreviewHeap, i * mPreviewFrameSize, mPreviewFrameSize); |
| 91 | } |
| 92 | |
| 93 | // Recreate the fake camera to reflect the current size. |
| 94 | delete mFakeCamera; |
| 95 | mFakeCamera = new FakeCamera(preview_width, preview_height); |
| 96 | } |
| 97 | |
| 98 | CameraHardwareStub::~CameraHardwareStub() |
| 99 | { |
| 100 | delete mFakeCamera; |
| 101 | mFakeCamera = 0; // paranoia |
| 102 | singleton.clear(); |
| 103 | } |
| 104 | |
| 105 | sp<IMemoryHeap> CameraHardwareStub::getPreviewHeap() const |
| 106 | { |
| 107 | return mPreviewHeap; |
| 108 | } |
| 109 | |
| 110 | sp<IMemoryHeap> CameraHardwareStub::getRawHeap() const |
| 111 | { |
| 112 | return mRawHeap; |
| 113 | } |
| 114 | |
| 115 | // --------------------------------------------------------------------------- |
| 116 | |
| 117 | int CameraHardwareStub::previewThread() |
| 118 | { |
| 119 | mLock.lock(); |
| 120 | // the attributes below can change under our feet... |
| 121 | |
| 122 | int previewFrameRate = mParameters.getPreviewFrameRate(); |
| 123 | |
| 124 | // Find the offset within the heap of the current buffer. |
| 125 | ssize_t offset = mCurrentPreviewFrame * mPreviewFrameSize; |
| 126 | |
| 127 | sp<MemoryHeapBase> heap = mPreviewHeap; |
| 128 | |
| 129 | // this assumes the internal state of fake camera doesn't change |
| 130 | // (or is thread safe) |
| 131 | FakeCamera* fakeCamera = mFakeCamera; |
| 132 | |
| 133 | sp<MemoryBase> buffer = mBuffers[mCurrentPreviewFrame]; |
| 134 | |
| 135 | mLock.unlock(); |
| 136 | |
| 137 | // TODO: here check all the conditions that could go wrong |
| 138 | if (buffer != 0) { |
| 139 | // Calculate how long to wait between frames. |
| 140 | int delay = (int)(1000000.0f / float(previewFrameRate)); |
| 141 | |
| 142 | // This is always valid, even if the client died -- the memory |
| 143 | // is still mapped in our process. |
| 144 | void *base = heap->base(); |
| 145 | |
| 146 | // Fill the current frame with the fake camera. |
| 147 | uint8_t *frame = ((uint8_t *)base) + offset; |
| 148 | fakeCamera->getNextFrameAsYuv422(frame); |
| 149 | |
| 150 | //LOGV("previewThread: generated frame to buffer %d", mCurrentPreviewFrame); |
| 151 | |
| 152 | // Notify the client of a new frame. |
| 153 | mPreviewCallback(buffer, mPreviewCallbackCookie); |
| 154 | |
| 155 | // Advance the buffer pointer. |
| 156 | mCurrentPreviewFrame = (mCurrentPreviewFrame + 1) % kBufferCount; |
| 157 | |
| 158 | // Wait for it... |
| 159 | usleep(delay); |
| 160 | } |
| 161 | |
| 162 | return NO_ERROR; |
| 163 | } |
| 164 | |
| 165 | status_t CameraHardwareStub::startPreview(preview_callback cb, void* user) |
| 166 | { |
| 167 | Mutex::Autolock lock(mLock); |
| 168 | if (mPreviewThread != 0) { |
| 169 | // already running |
| 170 | return INVALID_OPERATION; |
| 171 | } |
| 172 | mPreviewCallback = cb; |
| 173 | mPreviewCallbackCookie = user; |
| 174 | mPreviewThread = new PreviewThread(this); |
| 175 | return NO_ERROR; |
| 176 | } |
| 177 | |
| 178 | void CameraHardwareStub::stopPreview() |
| 179 | { |
| 180 | sp<PreviewThread> previewThread; |
| 181 | |
| 182 | { // scope for the lock |
| 183 | Mutex::Autolock lock(mLock); |
| 184 | previewThread = mPreviewThread; |
| 185 | } |
| 186 | |
| 187 | // don't hold the lock while waiting for the thread to quit |
| 188 | if (previewThread != 0) { |
| 189 | previewThread->requestExitAndWait(); |
| 190 | } |
| 191 | |
| 192 | Mutex::Autolock lock(mLock); |
| 193 | mPreviewThread.clear(); |
| 194 | } |
| 195 | |
| 196 | bool CameraHardwareStub::previewEnabled() { |
| 197 | return mPreviewThread != 0; |
| 198 | } |
| 199 | |
| 200 | status_t CameraHardwareStub::startRecording(recording_callback cb, void* user) |
| 201 | { |
| 202 | return UNKNOWN_ERROR; |
| 203 | } |
| 204 | |
| 205 | void CameraHardwareStub::stopRecording() |
| 206 | { |
| 207 | } |
| 208 | |
| 209 | bool CameraHardwareStub::recordingEnabled() |
| 210 | { |
| 211 | return false; |
| 212 | } |
| 213 | |
| 214 | void CameraHardwareStub::releaseRecordingFrame(const sp<IMemory>& mem) |
| 215 | { |
| 216 | } |
| 217 | |
| 218 | // --------------------------------------------------------------------------- |
| 219 | |
| 220 | int CameraHardwareStub::beginAutoFocusThread(void *cookie) |
| 221 | { |
| 222 | CameraHardwareStub *c = (CameraHardwareStub *)cookie; |
| 223 | return c->autoFocusThread(); |
| 224 | } |
| 225 | |
| 226 | int CameraHardwareStub::autoFocusThread() |
| 227 | { |
| 228 | if (mAutoFocusCallback != NULL) { |
| 229 | mAutoFocusCallback(true, mAutoFocusCallbackCookie); |
| 230 | mAutoFocusCallback = NULL; |
| 231 | return NO_ERROR; |
| 232 | } |
| 233 | return UNKNOWN_ERROR; |
| 234 | } |
| 235 | |
| 236 | status_t CameraHardwareStub::autoFocus(autofocus_callback af_cb, |
| 237 | void *user) |
| 238 | { |
| 239 | Mutex::Autolock lock(mLock); |
| 240 | |
| 241 | if (mAutoFocusCallback != NULL) { |
| 242 | return mAutoFocusCallback == af_cb ? NO_ERROR : INVALID_OPERATION; |
| 243 | } |
| 244 | |
| 245 | mAutoFocusCallback = af_cb; |
| 246 | mAutoFocusCallbackCookie = user; |
| 247 | if (createThread(beginAutoFocusThread, this) == false) |
| 248 | return UNKNOWN_ERROR; |
| 249 | return NO_ERROR; |
| 250 | } |
| 251 | |
| 252 | /*static*/ int CameraHardwareStub::beginPictureThread(void *cookie) |
| 253 | { |
| 254 | CameraHardwareStub *c = (CameraHardwareStub *)cookie; |
| 255 | return c->pictureThread(); |
| 256 | } |
| 257 | |
| 258 | int CameraHardwareStub::pictureThread() |
| 259 | { |
| 260 | if (mShutterCallback) |
| 261 | mShutterCallback(mPictureCallbackCookie); |
| 262 | |
| 263 | if (mRawPictureCallback) { |
| 264 | //FIXME: use a canned YUV image! |
| 265 | // In the meantime just make another fake camera picture. |
| 266 | int w, h; |
| 267 | mParameters.getPictureSize(&w, &h); |
| 268 | sp<MemoryBase> mem = new MemoryBase(mRawHeap, 0, w * 2 * h); |
| 269 | FakeCamera cam(w, h); |
| 270 | cam.getNextFrameAsYuv422((uint8_t *)mRawHeap->base()); |
| 271 | if (mRawPictureCallback) |
| 272 | mRawPictureCallback(mem, mPictureCallbackCookie); |
| 273 | } |
| 274 | |
| 275 | if (mJpegPictureCallback) { |
| 276 | sp<MemoryHeapBase> heap = new MemoryHeapBase(kCannedJpegSize); |
| 277 | sp<MemoryBase> mem = new MemoryBase(heap, 0, kCannedJpegSize); |
| 278 | memcpy(heap->base(), kCannedJpeg, kCannedJpegSize); |
| 279 | if (mJpegPictureCallback) |
| 280 | mJpegPictureCallback(mem, mPictureCallbackCookie); |
| 281 | } |
| 282 | return NO_ERROR; |
| 283 | } |
| 284 | |
| 285 | status_t CameraHardwareStub::takePicture(shutter_callback shutter_cb, |
| 286 | raw_callback raw_cb, |
| 287 | jpeg_callback jpeg_cb, |
| 288 | void* user) |
| 289 | { |
| 290 | stopPreview(); |
| 291 | mShutterCallback = shutter_cb; |
| 292 | mRawPictureCallback = raw_cb; |
| 293 | mJpegPictureCallback = jpeg_cb; |
| 294 | mPictureCallbackCookie = user; |
| 295 | if (createThread(beginPictureThread, this) == false) |
| 296 | return -1; |
| 297 | return NO_ERROR; |
| 298 | } |
| 299 | |
| 300 | status_t CameraHardwareStub::cancelPicture(bool cancel_shutter, |
| 301 | bool cancel_raw, |
| 302 | bool cancel_jpeg) |
| 303 | { |
| 304 | if (cancel_shutter) mShutterCallback = NULL; |
| 305 | if (cancel_raw) mRawPictureCallback = NULL; |
| 306 | if (cancel_jpeg) mJpegPictureCallback = NULL; |
| 307 | return NO_ERROR; |
| 308 | } |
| 309 | |
| 310 | status_t CameraHardwareStub::dump(int fd, const Vector<String16>& args) const |
| 311 | { |
| 312 | const size_t SIZE = 256; |
| 313 | char buffer[SIZE]; |
| 314 | String8 result; |
| 315 | AutoMutex lock(&mLock); |
| 316 | if (mFakeCamera != 0) { |
Niko Catania | c8f10f8 | 2009-03-24 20:53:55 -0700 | [diff] [blame] | 317 | mFakeCamera->dump(fd); |
The Android Open Source Project | edbf3b6 | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 318 | mParameters.dump(fd, args); |
| 319 | snprintf(buffer, 255, " preview frame(%d), size (%d), running(%s)\n", mCurrentPreviewFrame, mPreviewFrameSize, mPreviewRunning?"true": "false"); |
| 320 | result.append(buffer); |
| 321 | } else { |
| 322 | result.append("No camera client yet.\n"); |
| 323 | } |
| 324 | write(fd, result.string(), result.size()); |
| 325 | return NO_ERROR; |
| 326 | } |
| 327 | |
| 328 | status_t CameraHardwareStub::setParameters(const CameraParameters& params) |
| 329 | { |
| 330 | Mutex::Autolock lock(mLock); |
| 331 | // XXX verify params |
| 332 | |
| 333 | if (strcmp(params.getPreviewFormat(), "yuv422sp") != 0) { |
| 334 | LOGE("Only yuv422sp preview is supported"); |
| 335 | return -1; |
| 336 | } |
| 337 | |
| 338 | if (strcmp(params.getPictureFormat(), "jpeg") != 0) { |
| 339 | LOGE("Only jpeg still pictures are supported"); |
| 340 | return -1; |
| 341 | } |
| 342 | |
| 343 | int w, h; |
| 344 | params.getPictureSize(&w, &h); |
| 345 | if (w != kCannedJpegWidth && h != kCannedJpegHeight) { |
| 346 | LOGE("Still picture size must be size of canned JPEG (%dx%d)", |
| 347 | kCannedJpegWidth, kCannedJpegHeight); |
| 348 | return -1; |
| 349 | } |
| 350 | |
| 351 | mParameters = params; |
| 352 | |
| 353 | initHeapLocked(); |
| 354 | |
| 355 | return NO_ERROR; |
| 356 | } |
| 357 | |
| 358 | CameraParameters CameraHardwareStub::getParameters() const |
| 359 | { |
| 360 | Mutex::Autolock lock(mLock); |
| 361 | return mParameters; |
| 362 | } |
| 363 | |
| 364 | void CameraHardwareStub::release() |
| 365 | { |
| 366 | } |
| 367 | |
| 368 | wp<CameraHardwareInterface> CameraHardwareStub::singleton; |
| 369 | |
| 370 | sp<CameraHardwareInterface> CameraHardwareStub::createInstance() |
| 371 | { |
| 372 | if (singleton != 0) { |
| 373 | sp<CameraHardwareInterface> hardware = singleton.promote(); |
| 374 | if (hardware != 0) { |
| 375 | return hardware; |
| 376 | } |
| 377 | } |
| 378 | sp<CameraHardwareInterface> hardware(new CameraHardwareStub()); |
| 379 | singleton = hardware; |
| 380 | return hardware; |
| 381 | } |
| 382 | |
| 383 | extern "C" sp<CameraHardwareInterface> openCameraHardware() |
| 384 | { |
| 385 | return CameraHardwareStub::createInstance(); |
| 386 | } |
| 387 | |
| 388 | }; // namespace android |