guest/hals/camera/EmulatedQemuCamera.cpp

/*
 * Copyright (C) 2011 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.
 */

/*
 * Contains implementation of a class EmulatedQemuCamera that encapsulates
 * functionality of an emulated camera connected to the host.
 */

#define LOG_NDEBUG 0
#define LOG_TAG "EmulatedCamera_QemuCamera"
#include "EmulatedQemuCamera.h"
#include <log/log.h>
#include "EmulatedCameraFactory.h"

namespace android {

EmulatedQemuCamera::EmulatedQemuCamera(int cameraId, struct hw_module_t* module)
    : EmulatedCamera(cameraId, module), mQemuCameraDevice(this) {}

EmulatedQemuCamera::~EmulatedQemuCamera() {}

/****************************************************************************
 * EmulatedCamera virtual overrides.
 ***************************************************************************/

status_t EmulatedQemuCamera::Initialize(const char* device_name,
                                        const char* frame_dims,
                                        const char* facing_dir) {
  ALOGV("%s:\n   Name=%s\n   Facing '%s'\n   Dimensions=%s", __FUNCTION__,
        device_name, facing_dir, frame_dims);
  /* Save dimensions. */
  mFrameDims = frame_dims;

  /* Initialize camera device. */
  status_t res = mQemuCameraDevice.Initialize(device_name);
  if (res != NO_ERROR) {
    return res;
  }

  /* Initialize base class. */
  res = EmulatedCamera::Initialize();
  if (res != NO_ERROR) {
    return res;
  }

  /*
   * Set customizable parameters.
   */

  mParameters.set(EmulatedCamera::FACING_KEY, facing_dir);
  mParameters.set(EmulatedCamera::ORIENTATION_KEY,
                  gEmulatedCameraFactory.getQemuCameraOrientation());
  mParameters.set(CameraParameters::KEY_SUPPORTED_PICTURE_SIZES, frame_dims);
  mParameters.set(CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES, frame_dims);

  /*
   * Use first dimension reported by the device to set current preview and
   * picture sizes.
   */

  char first_dim[128];
  /* Dimensions are separated with ',' */
  const char* c = strchr(frame_dims, ',');
  if (c == NULL) {
    strncpy(first_dim, frame_dims, sizeof(first_dim));
    first_dim[sizeof(first_dim) - 1] = '\0';
  } else if (static_cast<size_t>(c - frame_dims) < sizeof(first_dim)) {
    memcpy(first_dim, frame_dims, c - frame_dims);
    first_dim[c - frame_dims] = '\0';
  } else {
    memcpy(first_dim, frame_dims, sizeof(first_dim));
    first_dim[sizeof(first_dim) - 1] = '\0';
  }

  /* Width and height are separated with 'x' */
  char* sep = strchr(first_dim, 'x');
  if (sep == NULL) {
    ALOGE("%s: Invalid first dimension format in %s", __FUNCTION__, frame_dims);
    return EINVAL;
  }

  *sep = '\0';
  const int x = atoi(first_dim);
  const int y = atoi(sep + 1);
  mParameters.setPreviewSize(x, y);
  mParameters.setPictureSize(x, y);

  ALOGV("%s: Qemu camera %s is initialized. Current frame is %dx%d",
        __FUNCTION__, device_name, x, y);

  return NO_ERROR;
}

EmulatedCameraDevice* EmulatedQemuCamera::getCameraDevice() {
  return &mQemuCameraDevice;
}

}; /* namespace android */