Initial Contribution
diff --git a/camera/libcameraservice/CameraHardwareStub.cpp b/camera/libcameraservice/CameraHardwareStub.cpp
new file mode 100644
index 0000000..ea21af8
--- /dev/null
+++ b/camera/libcameraservice/CameraHardwareStub.cpp
@@ -0,0 +1,357 @@
+/*
+**
+** Copyright 2008, 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_TAG "CameraHardwareStub"
+#include <utils/Log.h>
+
+#include "CameraHardwareStub.h"
+#include <utils/threads.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+
+#include "CannedJpeg.h"
+
+namespace android {
+
+CameraHardwareStub::CameraHardwareStub()
+ : mParameters(),
+ mHeap(0),
+ mFakeCamera(0),
+ mPreviewFrameSize(0),
+ mRawPictureCallback(0),
+ mJpegPictureCallback(0),
+ mPictureCallbackCookie(0),
+ mPreviewCallback(0),
+ mPreviewCallbackCookie(0),
+ mAutoFocusCallback(0),
+ mAutoFocusCallbackCookie(0),
+ mCurrentPreviewFrame(0)
+{
+ initDefaultParameters();
+}
+
+void CameraHardwareStub::initDefaultParameters()
+{
+ CameraParameters p;
+
+ p.setPreviewSize(176, 144);
+ p.setPreviewFrameRate(15);
+ p.setPreviewFormat("yuv422sp");
+
+ p.setPictureSize(kCannedJpegWidth, kCannedJpegHeight);
+ p.setPictureFormat("jpeg");
+
+ if (setParameters(p) != NO_ERROR) {
+ LOGE("Failed to set default parameters?!");
+ }
+}
+
+void CameraHardwareStub::initHeapLocked()
+{
+ int width, height;
+ mParameters.getPreviewSize(&width, &height);
+
+ LOGD("initHeapLocked: preview size=%dx%d", width, height);
+
+ // Note that we enforce yuv422 in setParameters().
+ int how_big = width * height * 2;
+
+ // If we are being reinitialized to the same size as before, no
+ // work needs to be done.
+ if (how_big == mPreviewFrameSize)
+ return;
+
+ mPreviewFrameSize = how_big;
+
+ // Make a new mmap'ed heap that can be shared across processes.
+ // use code below to test with pmem
+ mHeap = new MemoryHeapBase(mPreviewFrameSize * kBufferCount);
+ // Make an IMemory for each frame so that we can reuse them in callbacks.
+ for (int i = 0; i < kBufferCount; i++) {
+ mBuffers[i] = new MemoryBase(mHeap, i * mPreviewFrameSize, mPreviewFrameSize);
+ }
+
+ // Recreate the fake camera to reflect the current size.
+ delete mFakeCamera;
+ mFakeCamera = new FakeCamera(width, height);
+}
+
+CameraHardwareStub::~CameraHardwareStub()
+{
+ delete mFakeCamera;
+ mFakeCamera = 0; // paranoia
+ singleton.clear();
+}
+
+sp<IMemoryHeap> CameraHardwareStub::getPreviewHeap() const
+{
+ return mHeap;
+}
+
+// ---------------------------------------------------------------------------
+
+int CameraHardwareStub::previewThread()
+{
+ mLock.lock();
+ // the attributes below can change under our feet...
+
+ int previewFrameRate = mParameters.getPreviewFrameRate();
+
+ // Find the offset within the heap of the current buffer.
+ ssize_t offset = mCurrentPreviewFrame * mPreviewFrameSize;
+
+ sp<MemoryHeapBase> heap = mHeap;
+
+ // this assumes the internal state of fake camera doesn't change
+ // (or is thread safe)
+ FakeCamera* fakeCamera = mFakeCamera;
+
+ sp<MemoryBase> buffer = mBuffers[mCurrentPreviewFrame];
+
+ mLock.unlock();
+
+ // TODO: here check all the conditions that could go wrong
+ if (buffer != 0) {
+ // Calculate how long to wait between frames.
+ int delay = (int)(1000000.0f / float(previewFrameRate));
+
+ // This is always valid, even if the client died -- the memory
+ // is still mapped in our process.
+ void *base = heap->base();
+
+ // Fill the current frame with the fake camera.
+ uint8_t *frame = ((uint8_t *)base) + offset;
+ fakeCamera->getNextFrameAsYuv422(frame);
+
+ //LOGV("previewThread: generated frame to buffer %d", mCurrentPreviewFrame);
+
+ // Notify the client of a new frame.
+ mPreviewCallback(buffer, mPreviewCallbackCookie);
+
+ // Advance the buffer pointer.
+ mCurrentPreviewFrame = (mCurrentPreviewFrame + 1) % kBufferCount;
+
+ // Wait for it...
+ usleep(delay);
+ }
+
+ return NO_ERROR;
+}
+
+status_t CameraHardwareStub::startPreview(preview_callback cb, void* user)
+{
+ Mutex::Autolock lock(mLock);
+ if (mPreviewThread != 0) {
+ // already running
+ return INVALID_OPERATION;
+ }
+ mPreviewCallback = cb;
+ mPreviewCallbackCookie = user;
+ mPreviewThread = new PreviewThread(this);
+ return NO_ERROR;
+}
+
+void CameraHardwareStub::stopPreview()
+{
+ sp<PreviewThread> previewThread;
+
+ { // scope for the lock
+ Mutex::Autolock lock(mLock);
+ previewThread = mPreviewThread;
+ }
+
+ // don't hold the lock while waiting for the thread to quit
+ if (previewThread != 0) {
+ previewThread->requestExitAndWait();
+ }
+
+ Mutex::Autolock lock(mLock);
+ mPreviewThread.clear();
+}
+
+// ---------------------------------------------------------------------------
+
+int CameraHardwareStub::beginAutoFocusThread(void *cookie)
+{
+ CameraHardwareStub *c = (CameraHardwareStub *)cookie;
+ return c->autoFocusThread();
+}
+
+int CameraHardwareStub::autoFocusThread()
+{
+ if (mAutoFocusCallback != NULL) {
+ mAutoFocusCallback(true, mAutoFocusCallbackCookie);
+ mAutoFocusCallback = NULL;
+ return NO_ERROR;
+ }
+ return UNKNOWN_ERROR;
+}
+
+status_t CameraHardwareStub::autoFocus(autofocus_callback af_cb,
+ void *user)
+{
+ Mutex::Autolock lock(mLock);
+
+ if (mAutoFocusCallback != NULL) {
+ return mAutoFocusCallback == af_cb ? NO_ERROR : INVALID_OPERATION;
+ }
+
+ mAutoFocusCallback = af_cb;
+ mAutoFocusCallbackCookie = user;
+ if (createThread(beginAutoFocusThread, this) == false)
+ return UNKNOWN_ERROR;
+ return NO_ERROR;
+}
+
+/*static*/ int CameraHardwareStub::beginPictureThread(void *cookie)
+{
+ CameraHardwareStub *c = (CameraHardwareStub *)cookie;
+ return c->pictureThread();
+}
+
+int CameraHardwareStub::pictureThread()
+{
+ if (mShutterCallback)
+ mShutterCallback(mPictureCallbackCookie);
+
+ if (mRawPictureCallback) {
+ //FIXME: use a canned YUV image!
+ // In the meantime just make another fake camera picture.
+ int w, h;
+ mParameters.getPictureSize(&w, &h);
+ sp<MemoryHeapBase> heap = new MemoryHeapBase(w * 2 * h);
+ sp<MemoryBase> mem = new MemoryBase(heap, 0, w * 2 * h);
+ FakeCamera cam(w, h);
+ cam.getNextFrameAsYuv422((uint8_t *)heap->base());
+ if (mRawPictureCallback)
+ mRawPictureCallback(mem, mPictureCallbackCookie);
+ }
+
+ if (mJpegPictureCallback) {
+ sp<MemoryHeapBase> heap = new MemoryHeapBase(kCannedJpegSize);
+ sp<MemoryBase> mem = new MemoryBase(heap, 0, kCannedJpegSize);
+ memcpy(heap->base(), kCannedJpeg, kCannedJpegSize);
+ if (mJpegPictureCallback)
+ mJpegPictureCallback(mem, mPictureCallbackCookie);
+ }
+ return NO_ERROR;
+}
+
+status_t CameraHardwareStub::takePicture(shutter_callback shutter_cb,
+ raw_callback raw_cb,
+ jpeg_callback jpeg_cb,
+ void* user)
+{
+ stopPreview();
+ mShutterCallback = shutter_cb;
+ mRawPictureCallback = raw_cb;
+ mJpegPictureCallback = jpeg_cb;
+ mPictureCallbackCookie = user;
+ if (createThread(beginPictureThread, this) == false)
+ return -1;
+ return NO_ERROR;
+}
+
+status_t CameraHardwareStub::cancelPicture(bool cancel_shutter,
+ bool cancel_raw,
+ bool cancel_jpeg)
+{
+ if (cancel_shutter) mShutterCallback = NULL;
+ if (cancel_raw) mRawPictureCallback = NULL;
+ if (cancel_jpeg) mJpegPictureCallback = NULL;
+ return NO_ERROR;
+}
+
+status_t CameraHardwareStub::dump(int fd, const Vector<String16>& args) const
+{
+ const size_t SIZE = 256;
+ char buffer[SIZE];
+ String8 result;
+ AutoMutex lock(&mLock);
+ if (mFakeCamera != 0) {
+ mFakeCamera->dump(fd, args);
+ mParameters.dump(fd, args);
+ snprintf(buffer, 255, " preview frame(%d), size (%d), running(%s)\n", mCurrentPreviewFrame, mPreviewFrameSize, mPreviewRunning?"true": "false");
+ result.append(buffer);
+ } else {
+ result.append("No camera client yet.\n");
+ }
+ write(fd, result.string(), result.size());
+ return NO_ERROR;
+}
+
+status_t CameraHardwareStub::setParameters(const CameraParameters& params)
+{
+ Mutex::Autolock lock(mLock);
+ // XXX verify params
+
+ if (strcmp(params.getPreviewFormat(), "yuv422sp") != 0) {
+ LOGE("Only yuv422sp preview is supported");
+ return -1;
+ }
+
+ if (strcmp(params.getPictureFormat(), "jpeg") != 0) {
+ LOGE("Only jpeg still pictures are supported");
+ return -1;
+ }
+
+ int w, h;
+ params.getPictureSize(&w, &h);
+ if (w != kCannedJpegWidth && h != kCannedJpegHeight) {
+ LOGE("Still picture size must be size of canned JPEG (%dx%d)",
+ kCannedJpegWidth, kCannedJpegHeight);
+ return -1;
+ }
+
+ mParameters = params;
+
+ initHeapLocked();
+
+ return NO_ERROR;
+}
+
+CameraParameters CameraHardwareStub::getParameters() const
+{
+ Mutex::Autolock lock(mLock);
+ return mParameters;
+}
+
+void CameraHardwareStub::release()
+{
+}
+
+wp<CameraHardwareInterface> CameraHardwareStub::singleton;
+
+sp<CameraHardwareInterface> CameraHardwareStub::createInstance()
+{
+ if (singleton != 0) {
+ sp<CameraHardwareInterface> hardware = singleton.promote();
+ if (hardware != 0) {
+ return hardware;
+ }
+ }
+ sp<CameraHardwareInterface> hardware(new CameraHardwareStub());
+ singleton = hardware;
+ return hardware;
+}
+
+extern "C" sp<CameraHardwareInterface> openCameraHardware()
+{
+ return CameraHardwareStub::createInstance();
+}
+
+}; // namespace android