/*
 * Copyright (C) 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.
 */

/**
 * Contains implementation of a class EmulatedCamera that encapsulates
 * functionality common to all version 3.0 emulated camera devices.  Instances
 * of this class (for each emulated camera) are created during the construction
 * of the EmulatedCameraFactory instance.  This class serves as an entry point
 * for all camera API calls that defined by camera3_device_ops_t API.
 */

#define LOG_NDEBUG 0
#define LOG_TAG "EmulatedCamera3_Camera"
#include <log/log.h>

#include "EmulatedCamera3.h"
#include "system/camera_metadata.h"

namespace android {

/**
 * Constructs EmulatedCamera3 instance.
 * Param:
 *  cameraId - Zero based camera identifier, which is an index of the camera
 *      instance in camera factory's array.
 *  module - Emulated camera HAL module descriptor.
 */
EmulatedCamera3::EmulatedCamera3(int cameraId, struct hw_module_t* module)
    : EmulatedBaseCamera(cameraId, CAMERA_DEVICE_API_VERSION_3_3, &common,
                         module),
      mStatus(STATUS_ERROR) {
  common.close = EmulatedCamera3::close;
  ops = &sDeviceOps;

  mCallbackOps = NULL;
}

/* Destructs EmulatedCamera3 instance. */
EmulatedCamera3::~EmulatedCamera3() {}

/****************************************************************************
 * Abstract API
 ***************************************************************************/

/****************************************************************************
 * Public API
 ***************************************************************************/

status_t EmulatedCamera3::Initialize(const cvd::CameraDefinition& /*params*/) {
  ALOGV("%s", __FUNCTION__);

  mStatus = STATUS_CLOSED;
  return NO_ERROR;
}

/****************************************************************************
 * Camera API implementation
 ***************************************************************************/

status_t EmulatedCamera3::connectCamera(hw_device_t** device) {
  ALOGV("%s", __FUNCTION__);
  if (device == NULL) return BAD_VALUE;

  if (mStatus != STATUS_CLOSED) {
    ALOGE("%s: Trying to open a camera in state %d!", __FUNCTION__, mStatus);
    return INVALID_OPERATION;
  }

  *device = &common;
  mStatus = STATUS_OPEN;
  return NO_ERROR;
}

status_t EmulatedCamera3::closeCamera() {
  mStatus = STATUS_CLOSED;
  return NO_ERROR;
}

status_t EmulatedCamera3::getCameraInfo(struct camera_info* info) {
  return EmulatedBaseCamera::getCameraInfo(info);
}

/****************************************************************************
 * Camera Device API implementation.
 * These methods are called from the camera API callback routines.
 ***************************************************************************/

status_t EmulatedCamera3::initializeDevice(
    const camera3_callback_ops* callbackOps) {
  if (callbackOps == NULL) {
    ALOGE("%s: NULL callback ops provided to HAL!", __FUNCTION__);
    return BAD_VALUE;
  }

  if (mStatus != STATUS_OPEN) {
    ALOGE("%s: Trying to initialize a camera in state %d!", __FUNCTION__,
          mStatus);
    return INVALID_OPERATION;
  }

  mCallbackOps = callbackOps;
  mStatus = STATUS_READY;

  return NO_ERROR;
}

status_t EmulatedCamera3::configureStreams(
    camera3_stream_configuration* /*streamList*/) {
  ALOGE("%s: Not implemented", __FUNCTION__);
  return INVALID_OPERATION;
}

status_t EmulatedCamera3::registerStreamBuffers(
    const camera3_stream_buffer_set* /*bufferSet*/) {
  ALOGE("%s: Not implemented", __FUNCTION__);
  return INVALID_OPERATION;
}

const camera_metadata_t* EmulatedCamera3::constructDefaultRequestSettings(
    int /*type*/) {
  ALOGE("%s: Not implemented", __FUNCTION__);
  return NULL;
}

status_t EmulatedCamera3::processCaptureRequest(
    camera3_capture_request* /*request*/) {
  ALOGE("%s: Not implemented", __FUNCTION__);
  return INVALID_OPERATION;
}

status_t EmulatedCamera3::flush() {
  ALOGE("%s: Not implemented", __FUNCTION__);
  return INVALID_OPERATION;
}

/** Debug methods */

void EmulatedCamera3::dump(int /*fd*/) {
  ALOGE("%s: Not implemented", __FUNCTION__);
  return;
}

/****************************************************************************
 * Protected API. Callbacks to the framework.
 ***************************************************************************/

void EmulatedCamera3::sendCaptureResult(camera3_capture_result_t* result) {
  mCallbackOps->process_capture_result(mCallbackOps, result);
}

void EmulatedCamera3::sendNotify(camera3_notify_msg_t* msg) {
  mCallbackOps->notify(mCallbackOps, msg);
}

/****************************************************************************
 * Private API.
 ***************************************************************************/

/****************************************************************************
 * Camera API callbacks as defined by camera3_device_ops structure.  See
 * hardware/libhardware/include/hardware/camera3.h for information on each
 * of these callbacks. Implemented in this class, these callbacks simply
 * dispatch the call into an instance of EmulatedCamera3 class defined by the
 * 'camera_device3' parameter, or set a member value in the same.
 ***************************************************************************/

EmulatedCamera3* getInstance(const camera3_device_t* d) {
  const EmulatedCamera3* cec = static_cast<const EmulatedCamera3*>(d);
  return const_cast<EmulatedCamera3*>(cec);
}

int EmulatedCamera3::initialize(const struct camera3_device* d,
                                const camera3_callback_ops_t* callback_ops) {
  EmulatedCamera3* ec = getInstance(d);
  return ec->initializeDevice(callback_ops);
}

int EmulatedCamera3::configure_streams(
    const struct camera3_device* d,
    camera3_stream_configuration_t* stream_list) {
  EmulatedCamera3* ec = getInstance(d);
  return ec->configureStreams(stream_list);
}

int EmulatedCamera3::register_stream_buffers(
    const struct camera3_device* d,
    const camera3_stream_buffer_set_t* buffer_set) {
  EmulatedCamera3* ec = getInstance(d);
  return ec->registerStreamBuffers(buffer_set);
}

int EmulatedCamera3::process_capture_request(
    const struct camera3_device* d, camera3_capture_request_t* request) {
  EmulatedCamera3* ec = getInstance(d);
  return ec->processCaptureRequest(request);
}

const camera_metadata_t* EmulatedCamera3::construct_default_request_settings(
    const camera3_device_t* d, int type) {
  EmulatedCamera3* ec = getInstance(d);
  return ec->constructDefaultRequestSettings(type);
}

void EmulatedCamera3::dump(const camera3_device_t* d, int fd) {
  EmulatedCamera3* ec = getInstance(d);
  ec->dump(fd);
}

int EmulatedCamera3::flush(const camera3_device_t* d) {
  EmulatedCamera3* ec = getInstance(d);
  return ec->flush();
}

int EmulatedCamera3::close(struct hw_device_t* device) {
  EmulatedCamera3* ec = static_cast<EmulatedCamera3*>(
      reinterpret_cast<camera3_device_t*>(device));
  if (ec == NULL) {
    ALOGE("%s: Unexpected NULL camera3 device", __FUNCTION__);
    return BAD_VALUE;
  }
  return ec->closeCamera();
}

camera3_device_ops_t EmulatedCamera3::sDeviceOps = {
    EmulatedCamera3::initialize,
    EmulatedCamera3::configure_streams,
    /* DEPRECATED: register_stream_buffers */ nullptr,
    EmulatedCamera3::construct_default_request_settings,
    EmulatedCamera3::process_capture_request,
    /* DEPRECATED: get_metadata_vendor_tag_ops */ nullptr,
    EmulatedCamera3::dump,
    EmulatedCamera3::flush,
#ifdef CAMERA_DEVICE_API_VERSION_3_6
    /*UNUSED: signal_stream_flush*/nullptr,
#endif
    {0}};

const char* EmulatedCamera3::sAvailableCapabilitiesStrings[NUM_CAPABILITIES] = {
    "BACKWARD_COMPATIBLE",
    "MANUAL_SENSOR",
    "MANUAL_POST_PROCESSING",
    "RAW",
    "PRIVATE_REPROCESSING",
    "READ_SENSOR_SETTINGS",
    "BURST_CAPTURE",
    "YUV_REPROCESSING",
    "DEPTH_OUTPUT",
    "CONSTRAINED_HIGH_SPEED_VIDEO",
    "FULL_LEVEL"};

}; /* namespace android */