features.cpp

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/* $Id$ */

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*  Copyright (c) 2010 Jack O'Quin
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#include <cmath>
#include "features.h"


// static data and functions:
namespace
{
  // driver feature parameter names, corresponding to DC1394 modes
  // (not all currently supported by the driver)
  static const char *feature_names_[DC1394_FEATURE_NUM] =
    {
      "brightness",
      "exposure",
      "sharpness",
      "whitebalance",
      "hue",
      "saturation",
      "gamma",
      "shutter",
      "gain",
      "iris",
      "focus",
      "temperature",
      "trigger",
      "trigger_delay",
      "white_shading",
      "frame_rate",
      "zoom",
      "pan",
      "tilt",
      "optical_filter",
      "capture_size",
      "capture_quality"
    };

  inline const char *featureName(dc1394feature_t feature)
  {
    if (feature >= DC1394_FEATURE_MIN && feature <= DC1394_FEATURE_MAX)
      return feature_names_[feature - DC1394_FEATURE_MIN];
    else
      return "(unknown)";
  }

  // driver mode parameter names, corresponding to DC1394 modes
  static const char *mode_names_[DC1394_FEATURE_MODE_NUM] =
    {
      "Manual",
      "Auto",
      "OnePush",
    };

  inline const char *modeName(dc1394feature_mode_t mode)
  {
    if (mode >= DC1394_FEATURE_MODE_MIN && mode <= DC1394_FEATURE_MODE_MAX)
      return mode_names_[mode - DC1394_FEATURE_MODE_MIN];
    else
      return "(unknown)";
  }
}

// public methods:

Features::Features(dc1394camera_t *camera):
  camera_(camera)
{}

bool Features::initialize(Config *newconfig)
{
  // query all features for this device
  if (DC1394_SUCCESS != dc1394_feature_get_all(camera_, &feature_set_))
    {
      ROS_ERROR("could not get camera feature information");
      return false;
    }

  // validate and set configured value of each supported feature
  configure(DC1394_FEATURE_BRIGHTNESS,
            &newconfig->auto_brightness, &newconfig->brightness);
  configure(DC1394_FEATURE_EXPOSURE,
            &newconfig->auto_exposure, &newconfig->exposure);
  configure(DC1394_FEATURE_FOCUS,
            &newconfig->auto_focus, &newconfig->focus);
  configure(DC1394_FEATURE_GAIN,
            &newconfig->auto_gain, &newconfig->gain);
  configure(DC1394_FEATURE_GAMMA,
            &newconfig->auto_gamma, &newconfig->gamma);
  configure(DC1394_FEATURE_HUE,
            &newconfig->auto_hue, &newconfig->hue);
  configure(DC1394_FEATURE_IRIS,
            &newconfig->auto_iris, &newconfig->iris);
  configure(DC1394_FEATURE_SATURATION,
            &newconfig->auto_saturation, &newconfig->saturation);
  configure(DC1394_FEATURE_SHARPNESS,
            &newconfig->auto_sharpness, &newconfig->sharpness);
  configure(DC1394_FEATURE_SHUTTER,
            &newconfig->auto_shutter, &newconfig->shutter);
  configure(DC1394_FEATURE_WHITE_BALANCE, &newconfig->auto_white_balance,
            &newconfig->white_balance_BU, &newconfig->white_balance_RV);
  configure(DC1394_FEATURE_ZOOM,
            &newconfig->auto_zoom, &newconfig->zoom);

  // save configured values
  oldconfig_ = *newconfig;
  return true;
}

void Features::reconfigure(Config *newconfig)
{
  updateIfChanged(DC1394_FEATURE_BRIGHTNESS,
                  oldconfig_.auto_brightness, &newconfig->auto_brightness,
                  oldconfig_.brightness, &newconfig->brightness);
  updateIfChanged(DC1394_FEATURE_EXPOSURE,
                  oldconfig_.auto_exposure, &newconfig->auto_exposure,
                  oldconfig_.exposure, &newconfig->exposure);
  updateIfChanged(DC1394_FEATURE_FOCUS,
                  oldconfig_.auto_focus, &newconfig->auto_focus,
                  oldconfig_.focus, &newconfig->focus);
  updateIfChanged(DC1394_FEATURE_GAIN,
                  oldconfig_.auto_gain, &newconfig->auto_gain,
                  oldconfig_.gain, &newconfig->gain);
  updateIfChanged(DC1394_FEATURE_GAMMA,
                  oldconfig_.auto_gamma, &newconfig->auto_gamma,
                  oldconfig_.gamma, &newconfig->gamma);
  updateIfChanged(DC1394_FEATURE_HUE,
                  oldconfig_.auto_hue, &newconfig->auto_hue,
                  oldconfig_.hue, &newconfig->hue);
  updateIfChanged(DC1394_FEATURE_IRIS,
                  oldconfig_.auto_iris, &newconfig->auto_iris,
                  oldconfig_.iris, &newconfig->iris);
  updateIfChanged(DC1394_FEATURE_SATURATION,
                  oldconfig_.auto_saturation, &newconfig->auto_saturation,
                  oldconfig_.saturation, &newconfig->saturation);
  updateIfChanged(DC1394_FEATURE_SHARPNESS,
                  oldconfig_.auto_sharpness, &newconfig->auto_sharpness,
                  oldconfig_.sharpness, &newconfig->sharpness);
  updateIfChanged(DC1394_FEATURE_SHUTTER,
                  oldconfig_.auto_shutter, &newconfig->auto_shutter,
                  oldconfig_.shutter, &newconfig->shutter);
  // White balance has two component parameters: Blue/U and Red/V.
  updateIfChanged(DC1394_FEATURE_WHITE_BALANCE,
                  oldconfig_.auto_white_balance,
                  &newconfig->auto_white_balance,
                  oldconfig_.white_balance_BU, &newconfig->white_balance_BU,
                  oldconfig_.white_balance_RV, &newconfig->white_balance_RV);
  updateIfChanged(DC1394_FEATURE_ZOOM,
                  oldconfig_.auto_zoom, &newconfig->auto_zoom,
                  oldconfig_.zoom, &newconfig->zoom);

  // save modified values
  oldconfig_ = *newconfig;
}

// private methods:

void Features::configure(dc1394feature_t feature, int *control,
                         double *value, double *value2)
{
  // device-relevant information for this feature
  dc1394feature_info_t *finfo =
    &feature_set_.feature[feature - DC1394_FEATURE_MIN];

  if (!finfo->available)                // feature not available?
    {
      *control = camera1394::Camera1394_None;
      return;
    }

  switch (*control)
    {
    case camera1394::Camera1394_Off:
      setOff(finfo);
      break;

    case camera1394::Camera1394_Query:
      getValues(finfo, value, value2);
      break;

    case camera1394::Camera1394_Auto:
      if (!setMode(finfo, DC1394_FEATURE_MODE_AUTO))
        {
          setOff(finfo);
        }
      break;

    case camera1394::Camera1394_Manual:
      if (!setMode(finfo, DC1394_FEATURE_MODE_MANUAL))
        {
          setOff(finfo);
          break;
        }

      // TODO: break this into some internal methods
      if (finfo->absolute_capable && finfo->abs_control)
        {
          // supports reading and setting float value
          float fmin, fmax;
          if (DC1394_SUCCESS ==
              dc1394_feature_get_absolute_boundaries(camera_, feature,
                                                     &fmin, &fmax))
            {
              // clamp *value between minimum and maximum
              if (*value < fmin)
                *value = (double) fmin;
              else if (*value > fmax)
                *value = (double) fmax;
            }
          else
            {
              ROS_WARN_STREAM("failed to get feature "
                              << featureName(feature) << " boundaries ");
            }

          // @todo handle absolute White Balance values
          float fval = *value;
          if (DC1394_SUCCESS !=
              dc1394_feature_set_absolute_value(camera_, feature, fval))
            {
              ROS_WARN_STREAM("failed to set feature "
                              << featureName(feature) << " to " << fval);
            }
        }
      else // no float representation
        {
          // round requested value to nearest integer
          *value = rint(*value);

          // clamp *value between minimum and maximum
          if (*value < finfo->min)
            *value = (double) finfo->min;
          else if (*value > finfo->max)
            *value = (double) finfo->max;

          dc1394error_t rc;
          uint32_t ival = (uint32_t) *value;

          // handle White Balance, which has two components
          if (feature == DC1394_FEATURE_WHITE_BALANCE)
            {
              *value2 = rint(*value2);

              // clamp *value2 between same minimum and maximum
              if (*value2 < finfo->min)
                *value2 = (double) finfo->min;
              else if (*value2 > finfo->max)
                *value2 = (double) finfo->max;

              uint32_t ival2 = (uint32_t) *value2;
              rc = dc1394_feature_whitebalance_set_value(camera_, ival, ival2);
            }
          else
            {
              // other features only have one component
              rc = dc1394_feature_set_value(camera_, feature, ival);
            }
          if (rc != DC1394_SUCCESS)
            {
              ROS_WARN_STREAM("failed to set feature "
                              << featureName(feature) << " to " << ival);
            }
        }
      break;

    case camera1394::Camera1394_OnePush:
      // Try to set OnePush mode
      setMode(finfo, DC1394_FEATURE_MODE_ONE_PUSH_AUTO);

      // Now turn the control off, so camera does not continue adjusting
      setOff(finfo);
      break;

    case camera1394::Camera1394_None:
      // Invalid user input, because this feature actually does exist.
      ROS_INFO_STREAM("feature " << featureName(feature)
                      << " exists, cannot set to None");
      break;

    default:
      ROS_WARN_STREAM("unknown state (" << *control
                      <<") for feature " << featureName(feature));
    }

  // return actual state reported by the device
  *control = getState(finfo);
  ROS_DEBUG_STREAM("feature " << featureName(feature)
                   << " now in state " << *control);
}

Features::state_t Features::getState(dc1394feature_info_t *finfo)
{
  dc1394feature_t feature = finfo->id;
  dc1394error_t rc;

  if (!finfo->available)
    {
      // not available: nothing more to do
      return camera1394::Camera1394_None;
    }

  if (finfo->on_off_capable)
    {
      // get On/Off state
      dc1394switch_t pwr;
      rc = dc1394_feature_get_power(camera_, feature, &pwr);
      if (rc != DC1394_SUCCESS)
        {
          ROS_WARN_STREAM("failed to get feature " << featureName(feature)
                          << " Power setting ");
        }
      else if (pwr == DC1394_OFF)
        {
          // Off overrides mode settings
          return camera1394::Camera1394_Off;
        }
    }

  // not off, so get mode
  dc1394feature_mode_t mode;
  rc = dc1394_feature_get_mode(camera_, feature, &mode);
  if (rc != DC1394_SUCCESS)
    {
      ROS_WARN_STREAM("failed to get current mode of feature "
                      << featureName(feature));
      // treat unavailable mode as Off
      return camera1394::Camera1394_Off;
    }

  switch (mode)
    {
    case DC1394_FEATURE_MODE_MANUAL:
      return camera1394::Camera1394_Manual;
    case DC1394_FEATURE_MODE_AUTO:
      return camera1394::Camera1394_Auto;
    case DC1394_FEATURE_MODE_ONE_PUSH_AUTO:
      return camera1394::Camera1394_OnePush;
    default:
      return camera1394::Camera1394_Off;
    }
}

void Features::getValues(dc1394feature_info_t *finfo,
                           double *value, double *value2)
{
  dc1394feature_t feature = finfo->id;
  dc1394error_t rc;

  if (!finfo->readout_capable)
    {
      ROS_INFO_STREAM("feature " << featureName(feature)
                      << " value not available from device");
      return;
    }

  if (feature == DC1394_FEATURE_WHITE_BALANCE)
    {
      // handle White Balance separately, it has two components
      if (finfo->absolute_capable && finfo->abs_control)
        {
          // supports reading and setting float value
          // @todo get absolute White Balance values
          rc = DC1394_FUNCTION_NOT_SUPPORTED;
        }
      else
        {
          // get integer White Balance values
          uint32_t bu_val;
          uint32_t rv_val;
          rc = dc1394_feature_whitebalance_get_value(camera_, &bu_val, &rv_val);
          if (DC1394_SUCCESS == rc)
            {
              // convert to double
              *value = bu_val;
              *value2 = rv_val;
            }
        }
      if (DC1394_SUCCESS == rc)
        {
          ROS_DEBUG_STREAM("feature " << featureName(feature)
                           << " Blue/U: " << *value
                           << " Red/V: " << *value2);
        }
      else
        {
          ROS_WARN_STREAM("failed to get values for feature "
                          << featureName(feature));
        }
    }
  else
    {
      // other features only have one component
      if (finfo->absolute_capable && finfo->abs_control)
        {
          // supports reading and setting float value
          float fval;
          rc = dc1394_feature_get_absolute_value(camera_, feature, &fval);
          if (DC1394_SUCCESS == rc)
            {
              *value = fval;                // convert to double
            }
        }
      else // no float representation
        {
          uint32_t ival;
          rc = dc1394_feature_get_value(camera_, feature, &ival);
          if (DC1394_SUCCESS == rc)
            {
              *value = ival;                // convert to double
            }
        }
      if (DC1394_SUCCESS == rc)
        {
          ROS_DEBUG_STREAM("feature " << featureName(feature)
                           << " has value " << *value);
        }
      else
        {
          ROS_WARN_STREAM("failed to get value of feature "
                          << featureName(feature));
        }
    }
}

bool Features::setMode(dc1394feature_info_t *finfo, dc1394feature_mode_t mode)
{
  dc1394feature_t feature = finfo->id;
  if (hasMode(finfo, mode))
    {
      ROS_DEBUG_STREAM("setting feature " << featureName(feature)
                       << " mode to " << modeName(mode));
      if (DC1394_SUCCESS !=
          dc1394_feature_set_mode(camera_, feature, mode))
        {
          ROS_WARN_STREAM("failed to set feature " << featureName(feature)
                          << " mode to " << modeName(mode));
          return false;
        }
    }
  else
    {
      // device does not support this mode for this feature
      ROS_DEBUG_STREAM("no " << modeName(mode)
                       << " mode for feature " << featureName(feature));
      return false;
    }
  return true;
}

void Features::setOff(dc1394feature_info_t *finfo)
{
  dc1394feature_t feature = finfo->id;
  if (finfo->on_off_capable)
    {
      ROS_DEBUG_STREAM("setting feature " << featureName(feature) << " Off");
      if (DC1394_SUCCESS !=
          dc1394_feature_set_power(camera_, feature, DC1394_OFF))
        {
          ROS_WARN_STREAM("failed to set feature " << featureName(feature)
                          << " Off ");
        }
    }
  else
    {
      // This device does not support turning this feature off.
      // Inform the user, but pretend it worked.
      ROS_DEBUG_STREAM("no Off mode for feature " << featureName(feature));
    }
}

void Features::updateIfChanged(dc1394feature_t feature,
                               int old_control, int *control,
                               double old_value, double *value)
{
  if ((old_control != *control) || (old_value != *value))
    {
      configure(feature, control, value);
    }
}

void Features::updateIfChanged(dc1394feature_t feature,
                               int old_control, int *control,
                               double old_value, double *value,
                               double old_value2, double *value2)
{
  if ((old_control != *control)
      || (old_value != *value)
      || (old_value2 != *value2))
    {
      configure(feature, control, value, value2);
    }
}