/*
 * 1394-Based Digital Camera Control Library
 *
 * Format_7 functions
 *
 * Written by Damien Douxchamps <ddouxchamps@users.sf.net>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <unistd.h>
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include <errno.h>
#include <stdlib.h>

#include "control.h"
#include "internal.h"
#include "register.h"
#include "offsets.h"
#include "utils.h"
#include "config.h"
#include "log.h"

#ifdef __MINGW32__
#include <unistd.h>
#endif

/*==========================================================================
 * This function implements the handshaking available (and sometimes required)
 * on some cameras that comply with the IIDC specs v1.30. Thanks to Yasutoshi
 * Onishi for his feedback and info.
 *==========================================================================*/

dc1394error_t
dc1394_format7_get_value_setting(dc1394camera_t *camera, dc1394video_mode_t video_mode,
                                 uint32_t *present, uint32_t *setting1,
                                 uint32_t *err_flag1, uint32_t *err_flag2)
{
    dc1394error_t err;
    uint32_t value;

    if (camera->iidc_version<DC1394_IIDC_VERSION_1_30) {
        *present=0;
        return DC1394_SUCCESS;
    }

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_VALUE_SETTING, &value);
    DC1394_ERR_RTN(err, "could note get value setting");

    *present= (uint32_t) ( value & 0x80000000UL ) >> 31;
    *setting1= (uint32_t) ( value & 0x40000000UL ) >> 30;
    *err_flag1= (uint32_t) ( value & 0x00800000UL ) >> 23;
    *err_flag2= (uint32_t) ( value & 0x00400000UL ) >> 22;

    return err;
}

int
dc1394_format7_set_value_setting(dc1394camera_t *camera, dc1394video_mode_t video_mode)
{
    int err;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_set_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_VALUE_SETTING, (uint32_t)0x40000000UL);
    DC1394_ERR_RTN(err, "Could not set value setting");

    return err;
}

dc1394error_t
_dc1394_v130_handshake(dc1394camera_t *camera, dc1394video_mode_t video_mode)
{
    uint32_t setting_1, err_flag1, err_flag2, v130handshake;
    uint32_t exit_loop;
    dc1394error_t err;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    if (camera->iidc_version >= DC1394_IIDC_VERSION_1_30) {
        // We don't use > because 114 is for ptgrey cameras which are not 1.30 but 1.20
        err=dc1394_format7_get_value_setting(camera, video_mode, &v130handshake, &setting_1, &err_flag1, &err_flag2);
        DC1394_ERR_RTN(err, "Unable to read value setting register");
    }
    else {
        v130handshake=0;
        return DC1394_SUCCESS;
    }

    if (v130handshake==1) {
        // we should use advanced IIDC v1.30 handshaking.
        // set value setting to 1
        err=dc1394_format7_set_value_setting(camera, video_mode);
        DC1394_ERR_RTN(err, "Unable to set value setting register");

        // wait for value setting to clear:
        exit_loop=0;
        while (!exit_loop) { // WARNING: there is no timeout in this loop yet.
            err=dc1394_format7_get_value_setting(camera, video_mode, &v130handshake, &setting_1, &err_flag1, &err_flag2);
            DC1394_ERR_RTN(err, "Unable to read value setting register");

            exit_loop=(setting_1==0);
            usleep(0);
        }
        if (err_flag1>0) {
            err=DC1394_FORMAT7_ERROR_FLAG_1;
            DC1394_ERR_RTN(err, "invalid image position, size, color coding or ISO speed");
        }
        /*
        // This seems to make problems. Remove for now.
        if (err_flag2>0) {
        err=DC1394_FORMAT7_ERROR_FLAG_2;
        DC1394_ERR_RTN(err, "proposed packet size is not a valid value");
        }
        */

        // packet size... registers are ready for reading.
    }

    return err;
}

dc1394error_t
_dc1394_format7_set_image_position(dc1394camera_t *camera,
                                   dc1394video_mode_t video_mode, uint32_t left,
                                   uint32_t top)
{
    dc1394error_t err;

    // it is allowed to change the image position even if capture is running.

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_set_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_IMAGE_POSITION, (uint32_t)((left << 16) | top));
    DC1394_ERR_RTN(err, "Format7 image position setting failure");

    return err;
}

dc1394error_t
_dc1394_format7_set_image_size(dc1394camera_t *camera,
                               dc1394video_mode_t video_mode, uint32_t width,
                               uint32_t height)
{
    dc1394error_t err;
    dc1394video_mode_t mode;

    err=dc1394_video_get_mode(camera,&mode);
    DC1394_ERR_RTN(err,"Could not get current video mode");

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_set_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_IMAGE_SIZE, (uint32_t)((width << 16) | height));
    DC1394_ERR_RTN(err, "Format7 image size setting failure");

    return err;
}

dc1394error_t
_dc1394_format7_set_color_coding(dc1394camera_t *camera,
                                 dc1394video_mode_t video_mode, dc1394color_coding_t color_coding)
{
    dc1394error_t err;
    dc1394video_mode_t mode;

    if ( (color_coding<DC1394_COLOR_CODING_MIN) || (color_coding>DC1394_COLOR_CODING_MAX) )
        return DC1394_INVALID_COLOR_CODING;

    err=dc1394_video_get_mode(camera,&mode);
    DC1394_ERR_RTN(err,"Could not get current video mode");

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    color_coding-= DC1394_COLOR_CODING_MIN;
    color_coding=color_coding<<24;
    err=dc1394_set_format7_register(camera, video_mode,REG_CAMERA_FORMAT7_COLOR_CODING_ID, (uint32_t)color_coding);
    DC1394_ERR_RTN(err, "Format7 color coding setting failure");

    // IIDC v1.30 handshaking:
    //err=_dc1394_v130_handshake(camera, video_mode);
    //DC1394_ERR_RTN(err, "F7 handshake failure");

    return err;
}

dc1394error_t
_dc1394_format7_set_packet_size(dc1394camera_t *camera,
                                dc1394video_mode_t video_mode,
                                uint32_t packet_size)
{
    dc1394error_t err;
    dc1394video_mode_t mode;

    err=dc1394_video_get_mode(camera,&mode);
    DC1394_ERR_RTN(err,"Could not get current video mode");

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_set_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_BYTE_PER_PACKET, (uint32_t)(packet_size) << 16 );
    DC1394_ERR_RTN(err, "Format7 packet size setting failure");

    // IIDC v1.30 handshaking:
    //err=_dc1394_v130_handshake(camera, video_mode);
    //DC1394_ERR_RTN(err, "F7 handshake failure");

    return err;
}

/**********************/
/* External functions */
/**********************/

dc1394error_t
dc1394_format7_get_max_image_size(dc1394camera_t *camera,
                                  dc1394video_mode_t video_mode,
                                  uint32_t *horizontal_size,
                                  uint32_t *vertical_size)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_MAX_IMAGE_SIZE_INQ, &value);
    DC1394_ERR_RTN(err, "Could not get max image sizes");

    *horizontal_size  = (uint32_t) ( value & 0xFFFF0000UL ) >> 16;
    *vertical_size= (uint32_t) ( value & 0x0000FFFFUL );

    return err;
}

dc1394error_t
dc1394_format7_get_unit_size(dc1394camera_t *camera,
                             dc1394video_mode_t video_mode,
                             uint32_t *horizontal_unit,
                             uint32_t *vertical_unit)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_UNIT_SIZE_INQ, &value);
    DC1394_ERR_RTN(err, "Could not get unit sizes");

    *horizontal_unit  = (uint32_t) ( value & 0xFFFF0000UL ) >> 16;
    *vertical_unit= (uint32_t) ( value & 0x0000FFFFUL );

    return err;
}

dc1394error_t
dc1394_format7_get_image_position(dc1394camera_t *camera,
                                  dc1394video_mode_t video_mode,
                                  uint32_t *left_position,
                                  uint32_t *top_position)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_IMAGE_POSITION, &value);
    DC1394_ERR_RTN(err, "Could not get image position");

    *left_position = (uint32_t) ( value & 0xFFFF0000UL ) >> 16;
    *top_position= (uint32_t) ( value & 0x0000FFFFUL );

    return err;
}


dc1394error_t
dc1394_format7_get_image_size(dc1394camera_t *camera,
                              dc1394video_mode_t video_mode,
                              uint32_t *width,
                              uint32_t *height)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_IMAGE_SIZE, &value);
    DC1394_ERR_RTN(err, "could not get current image size");

    *width= (uint32_t) ( value & 0xFFFF0000UL ) >> 16;
    *height = (uint32_t) ( value & 0x0000FFFFUL );

    return err;
}

dc1394error_t
dc1394_format7_get_color_coding(dc1394camera_t *camera,
                                dc1394video_mode_t video_mode,
                                dc1394color_coding_t *color_coding)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_COLOR_CODING_ID, &value);
    DC1394_ERR_RTN(err, "Could not get current color_id");

    value=value>>24;
    *color_coding= (uint32_t)value+DC1394_COLOR_CODING_MIN;

    return err;
}

dc1394error_t
dc1394_format7_get_color_codings(dc1394camera_t *camera,
                                 dc1394video_mode_t video_mode,
                                 dc1394color_codings_t *color_codings)
{
    dc1394error_t err;
    int i;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_COLOR_CODING_INQ, &value);
    DC1394_ERR_RTN(err, "Could not get available color codings");

    color_codings->num=0;
    for (i=0;i<DC1394_COLOR_CODING_NUM;i++) {
        if ((value & (0x1 << (31-i))) > 0) {
            color_codings->codings[color_codings->num]=i+DC1394_COLOR_CODING_MIN;
            color_codings->num++;
        }
    }

    return err;
}

dc1394error_t
dc1394_format7_get_pixel_number(dc1394camera_t *camera,
                                 dc1394video_mode_t video_mode,
                                uint32_t *pixnum)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_PIXEL_NUMBER_INQ, &value);
    DC1394_ERR_RTN(err, "Could not get pixel number");

    *pixnum= (uint32_t) value;

    return err;
}

dc1394error_t
dc1394_format7_get_total_bytes(dc1394camera_t *camera,
                               dc1394video_mode_t video_mode,
                               uint64_t *total_bytes)
{
    dc1394error_t err;
    uint64_t value_hi, value_lo;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_TOTAL_BYTES_HI_INQ, &value);
    DC1394_ERR_RTN(err, "Could not get total bytes - LSB");

    value_hi=value;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_TOTAL_BYTES_LO_INQ, &value);
    DC1394_ERR_RTN(err, "Could not get total bytes - MSB");

    value_lo=value;

    *total_bytes= (value_lo | ( value_hi << 32) );

    return err;
}

dc1394error_t
dc1394_format7_get_packet_parameters(dc1394camera_t *camera,
                                     dc1394video_mode_t video_mode, uint32_t *unit_bytes,
                                     uint32_t *max_bytes)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err= dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_PACKET_PARA_INQ, &value);
    DC1394_ERR_RTN(err, "Could not get F7 packet parameters");

    *unit_bytes= (uint32_t) ( value & 0xFFFF0000UL ) >> 16;
    *max_bytes= (uint32_t) ( value & 0x0000FFFFUL );

    return err;
}

dc1394error_t
dc1394_format7_get_packet_size(dc1394camera_t *camera,
                               dc1394video_mode_t video_mode,
                               uint32_t *packet_size)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_BYTE_PER_PACKET, &value);
    DC1394_ERR_RTN(err, "Could not get packet size");

    *packet_size= (uint32_t) ( value & 0xFFFF0000UL ) >> 16;

    if (*packet_size==0) {
        dc1394_log_error("packet size is zero. This should not happen.");
        return DC1394_FAILURE;
    }
    return err;
}

dc1394error_t
dc1394_format7_set_image_position(dc1394camera_t *camera,
                                  dc1394video_mode_t video_mode, uint32_t left,
                                  uint32_t top)
{
    dc1394error_t err=_dc1394_format7_set_image_position(camera, video_mode, left, top);
    DC1394_ERR_RTN(err, "Format7 image position setting failure");

    // IIDC v1.30 handshaking:
    err=_dc1394_v130_handshake(camera, video_mode);
    DC1394_ERR_RTN(err, "F7 handshake failure");

    return err;
}


dc1394error_t
dc1394_format7_set_image_size(dc1394camera_t *camera,
                              dc1394video_mode_t video_mode, uint32_t width,
                              uint32_t height)
{
    dc1394error_t err=_dc1394_format7_set_image_size(camera, video_mode, width, height);
    DC1394_ERR_RTN(err, "Format7 image size setting failure");

    // IIDC v1.30 handshaking:
    err=_dc1394_v130_handshake(camera, video_mode);
    DC1394_ERR_RTN(err, "F7 handshake failure");

    return err;
}


dc1394error_t
dc1394_format7_set_color_coding(dc1394camera_t *camera,
                                dc1394video_mode_t video_mode, dc1394color_coding_t color_coding)
{
    dc1394error_t err=_dc1394_format7_set_color_coding(camera, video_mode, color_coding);
    DC1394_ERR_RTN(err, "Format7 color_coding setting failure");

    // IIDC v1.30 handshaking:
    err=_dc1394_v130_handshake(camera, video_mode);
    DC1394_ERR_RTN(err, "F7 handshake failure");

    return err;
}


dc1394error_t
dc1394_format7_set_packet_size(dc1394camera_t *camera,
                               dc1394video_mode_t video_mode,
                               uint32_t packet_bytes)
{
    dc1394error_t err=_dc1394_format7_set_packet_size(camera, video_mode, packet_bytes);
    DC1394_ERR_RTN(err, "Format7 packet size setting failure");

    // IIDC v1.30 handshaking:
    err=_dc1394_v130_handshake(camera, video_mode);
    DC1394_ERR_RTN(err, "F7 handshake failure");

    return err;
}

dc1394error_t
dc1394_format7_get_recommended_packet_size(dc1394camera_t *camera,
                                           dc1394video_mode_t video_mode, uint32_t *packet_size)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err= dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_BYTE_PER_PACKET, &value);
    DC1394_ERR_RTN(err, "Could not get recommended BPP");

    *packet_size= (uint32_t) ( value & 0x0000FFFFUL );

    return err;
}

dc1394error_t
dc1394_format7_get_packets_per_frame(dc1394camera_t *camera,
                                     dc1394video_mode_t video_mode, uint32_t *ppf)
{
    dc1394error_t err;
    uint32_t value;
    uint32_t packet_size;
    uint64_t total_bytes;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    *ppf = 0;
    if (camera->iidc_version>=DC1394_IIDC_VERSION_1_30) {

        err= dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_PACKET_PER_FRAME_INQ, &value);
        DC1394_ERR_RTN(err, "Could not get the number of packets per frame");
        *ppf= (uint32_t) (value);
    }

    /* Perform computation according to 4.9.7 in the IIDC spec for cameras that do
     * not support PACKET_PER_FRAME_INQ */
    if (*ppf == 0) {
        // return an estimate, NOT TAKING ANY PADDING INTO ACCOUNT
        err=dc1394_format7_get_packet_size(camera, video_mode, &packet_size);
        DC1394_ERR_RTN(err, "Could not get BPP");

        if (packet_size==0) {
            return DC1394_FAILURE;
        }

        err=dc1394_format7_get_total_bytes(camera, video_mode, &total_bytes);
        DC1394_ERR_RTN(err, "Could not get total number of bytes");

        if (total_bytes%packet_size!=0)
            *ppf=total_bytes/packet_size+1;
        else
            *ppf=total_bytes/packet_size;

        return err;
    }

    return DC1394_SUCCESS;
}

dc1394error_t
dc1394_format7_get_unit_position(dc1394camera_t *camera,
                                 dc1394video_mode_t video_mode,
                                 uint32_t *horizontal_pos,
                                 uint32_t *vertical_pos)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    if (camera->iidc_version>=DC1394_IIDC_VERSION_1_30) {
        err = dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_UNIT_POSITION_INQ, &value);
        DC1394_ERR_RTN(err, "Could not get unit position");
    }
    else {
        // if version is not 1.30, use the UNIT_SIZE_INQ register
        err = dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_UNIT_SIZE_INQ, &value);
        DC1394_ERR_RTN(err, "Could not get unit size");
    }

    *horizontal_pos = (uint32_t) (( value & 0xFFFF0000UL )>>16);
    *vertical_pos   = (uint32_t) ( value & 0x0000FFFFUL );

    return err;
}

dc1394error_t
dc1394_format7_get_frame_interval(dc1394camera_t *camera, dc1394video_mode_t video_mode, float *interval)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_FRAME_INTERVAL_INQ, &value);
    DC1394_ERR_RTN(err, "Could not get frame interval");

    *interval=value;

    return err;
}

dc1394error_t
dc1394_format7_get_data_depth(dc1394camera_t *camera, dc1394video_mode_t video_mode, uint32_t *data_depth)
{
    dc1394error_t err;
    uint32_t value;
    dc1394color_coding_t coding;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    *data_depth = 0;
    if (camera->iidc_version >= DC1394_IIDC_VERSION_1_31) {
        err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_DATA_DEPTH_INQ, &value);

        DC1394_ERR_RTN(err, "Could not get format7 data depth");
        *data_depth=value >> 24;
    }

    /* For cameras that do not have the DATA_DEPTH_INQ register, perform a
     * sane default. */
    if (*data_depth == 0) {
        err = dc1394_get_color_coding_from_video_mode (camera, video_mode, &coding);
        DC1394_ERR_RTN(err, "Could not get color coding");

        err = dc1394_get_color_coding_data_depth (coding, data_depth);
        DC1394_ERR_RTN(err, "Could not get data depth from color coding");

        return err;
    }

    return DC1394_SUCCESS;
}

dc1394error_t
dc1394_format7_get_color_filter(dc1394camera_t *camera, dc1394video_mode_t video_mode, dc1394color_filter_t *color_filter)
{
    dc1394error_t err;
    uint32_t value;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    if (camera->iidc_version<DC1394_IIDC_VERSION_1_31)
        return DC1394_FUNCTION_NOT_SUPPORTED;

    err=dc1394_get_format7_register(camera, video_mode, REG_CAMERA_FORMAT7_COLOR_FILTER_ID, &value);
    DC1394_ERR_RTN(err, "Could not get color filter ID");

    *color_filter= (value >> 24)+DC1394_COLOR_FILTER_MIN;
    return err;
}

dc1394error_t
dc1394_format7_get_mode_info(dc1394camera_t *camera, dc1394video_mode_t video_mode, dc1394format7mode_t *f7_mode)
{
    dc1394error_t err=DC1394_SUCCESS;

    if (!dc1394_is_video_mode_scalable(video_mode))
        return DC1394_INVALID_VIDEO_MODE;

    if (f7_mode->present>0) { // check for mode presence before query
        err=dc1394_format7_get_max_image_size(camera,video_mode,&f7_mode->max_size_x,&f7_mode->max_size_y);
        DC1394_ERR_RTN(err,"Got a problem querying format7 max image size");
        err=dc1394_format7_get_unit_size(camera,video_mode,&f7_mode->unit_size_x,&f7_mode->unit_size_y);
        DC1394_ERR_RTN(err,"Got a problem querying format7 unit size");
        err=dc1394_format7_get_unit_position(camera,video_mode,&f7_mode->unit_pos_x,&f7_mode->unit_pos_y);
        if (err!=DC1394_SUCCESS) {
            //DC1394_ERR_RTN(err,"Got a problem querying format7 unit position");
            // unit position might not be supported, hence a softer check is implemented
            f7_mode->unit_pos_x=0;
            f7_mode->unit_pos_y=0;
        }

        err=dc1394_format7_get_image_position(camera,video_mode,&f7_mode->pos_x,&f7_mode->pos_y);
        DC1394_ERR_RTN(err,"Got a problem querying format7 image position");
        err=dc1394_format7_get_image_size(camera,video_mode,&f7_mode->size_x,&f7_mode->size_y);
        DC1394_ERR_RTN(err,"Got a problem querying format7 image size");
        err=dc1394_format7_get_packet_size(camera,video_mode,&f7_mode->packet_size);
        DC1394_ERR_RTN(err,"Got a problem querying format7 packet_size");

        if (f7_mode->packet_size==0) {
            // sometimes a camera will not set the bpp register until a valid image size
            // has been set after boot. If BPP is zero, we therefor
            // try again after setting the image size to the maximum size.
            err=dc1394_format7_set_image_position(camera,video_mode,0,0);
            DC1394_ERR_RTN(err,"Got a problem setting format7 image position");
            err=dc1394_format7_set_image_size(camera,video_mode,f7_mode->max_size_x,f7_mode->max_size_y);
            DC1394_ERR_RTN(err,"Got a problem setting format7 image size");
            // maybe we should also force a color coding here.
            err=dc1394_format7_get_packet_size(camera,video_mode,&f7_mode->packet_size);
            DC1394_ERR_RTN(err,"Got a problem querying format7 packet size");
        }

        err=dc1394_format7_get_packet_parameters(camera,video_mode,&f7_mode->unit_packet_size,&f7_mode->max_packet_size);
        DC1394_ERR_RTN(err,"Got a problem querying format7 packet parameters");
        err=dc1394_format7_get_pixel_number(camera,video_mode,&f7_mode->pixnum);
        DC1394_ERR_RTN(err,"Got a problem querying format7 pixel number");
        err=dc1394_format7_get_total_bytes(camera,video_mode,&f7_mode->total_bytes);
        DC1394_ERR_RTN(err,"Got a problem querying format7 total bytes per frame");
        err=dc1394_format7_get_color_coding(camera,video_mode,&f7_mode->color_coding);
        DC1394_ERR_RTN(err,"Got a problem querying format7 color coding ID");
        err=dc1394_format7_get_color_codings(camera,video_mode,&f7_mode->color_codings);
        DC1394_ERR_RTN(err,"Got a problem querying format7 color coding");

        // WARNING: this requires to set the format7 mode!!
        if (camera->iidc_version >= DC1394_IIDC_VERSION_1_31) {
            err=dc1394_format7_get_color_filter(camera,video_mode,&f7_mode->color_filter);
            DC1394_ERR_RTN(err,"Got a problem querying format7 bayer pattern");
        }
        else {
            f7_mode->color_filter = 0;
        }

    }

    return err;
}

dc1394error_t
dc1394_format7_get_modeset(dc1394camera_t *camera, dc1394format7modeset_t *info)
{
    dc1394error_t err;
    int i;
    dc1394video_modes_t modes;

    for (i=0;i<DC1394_VIDEO_MODE_FORMAT7_NUM;i++) {
        info->mode[i].present=0;
    }

    err=dc1394_video_get_supported_modes(camera, &modes);
    DC1394_ERR_RTN(err,"Could not query supported formats");

    // find a mode which is F7:
    for (i=0;i<modes.num;i++) {
        if (dc1394_is_video_mode_scalable(modes.modes[i])) {
            info->mode[modes.modes[i]-DC1394_VIDEO_MODE_FORMAT7_MIN].present= 1;
            dc1394_format7_get_mode_info(camera, modes.modes[i], &info->mode[modes.modes[i]-DC1394_VIDEO_MODE_FORMAT7_MIN]);
        }
    }

    return err;
}

dc1394error_t
dc1394_format7_set_roi(dc1394camera_t *camera,
                       dc1394video_mode_t video_mode,
                       dc1394color_coding_t color_coding,
                       int32_t packet_size,
                       int32_t left, int32_t top,
                       int32_t width, int32_t height)
{
    uint32_t unit_bytes, max_bytes;
    uint32_t recom_packet_size;
    uint32_t camera_left = 0;
    uint32_t camera_top = 0;
    uint32_t camera_width = 0;
    uint32_t camera_height = 0;
    uint32_t max_width = 0;
    uint32_t max_height = 0;
    uint32_t uint_packet_size=0;
    dc1394error_t err;

    // ===========================================================
    // COLOR CODING
    // ===========================================================
    // deal with color coding early as it may have an effect on max bpp, sizes, etc...
    if (color_coding==DC1394_QUERY_FROM_CAMERA) {
        err=dc1394_format7_get_color_coding(camera, video_mode, &color_coding);
        DC1394_ERR_RTN(err, "Unable to get color_coding");
    }
    else {
        if (color_coding<0) {
            // error: other auto modes not supported
            return DC1394_INVALID_ARGUMENT_VALUE;
        }
        // set color coding
        err=_dc1394_format7_set_color_coding(camera, video_mode, color_coding);
        DC1394_ERR_RTN(err, "Unable to set color_coding");

        // do handshaking to be sure that the value is now effective
        err=_dc1394_v130_handshake(camera, video_mode);
        DC1394_ERR_RTN(err, "Handshaking failed after setting color_coding");
    }

    // ===========================================================
    // POSITION AND SIZE
    // ===========================================================
    // we do this together as they influence each other. Only one hadshaking at the end.
    if ( width == DC1394_QUERY_FROM_CAMERA || height == DC1394_QUERY_FROM_CAMERA) {
        err=dc1394_format7_get_image_size(camera, video_mode, &camera_width, &camera_height);
        DC1394_ERR_RTN(err, "Unable to query image size");

        /* Idea from Ralf Ebeling: we should check if the image sizes are > 0.
           If == 0, we use the maximum size available */
        if (width == DC1394_QUERY_FROM_CAMERA) {
            if (camera_width>0)
                width = camera_width;
            else
                width = DC1394_USE_MAX_AVAIL;
        }
        if (height == DC1394_QUERY_FROM_CAMERA) {
            if (camera_height>0)
                height = camera_height;
            else
                height = DC1394_USE_MAX_AVAIL;
        }
    }

    if ( left == DC1394_QUERY_FROM_CAMERA || top == DC1394_QUERY_FROM_CAMERA) {
        err=dc1394_format7_get_image_position(camera, video_mode, &camera_left, &camera_top);
        DC1394_ERR_RTN(err, "Unable to query image position");

        if( left == DC1394_QUERY_FROM_CAMERA)
            left = camera_left;
        if( top == DC1394_QUERY_FROM_CAMERA)
            top = camera_top;
    }

    if ( width == DC1394_USE_MAX_AVAIL || height == DC1394_USE_MAX_AVAIL) {
        err=dc1394_format7_get_max_image_size(camera, video_mode, &max_width, &max_height);
        DC1394_ERR_RTN(err, "Unable to query max image size");
        if( width == DC1394_USE_MAX_AVAIL)
            width  = max_width - left;
        if( height == DC1394_USE_MAX_AVAIL)
            height = max_height - top;
    }
    if ((left<0)||(top<0)) {
        // error: other auto modes not supported
        return DC1394_INVALID_ARGUMENT_VALUE;
    }
    /* First set image position to (0,0) to allow the size/position to change
       without passing through an impossible state. The order of the operations is
       1) set position to (0,0), 2) set size 3) set position. Other orders may fail
       to properly set the camera, even if the pos/size couple if OK. */
    err=_dc1394_format7_set_image_position(camera, video_mode, 0,0);
    DC1394_ERR_RTN(err, "Unable to set image position");
    err=_dc1394_format7_set_image_size(camera, video_mode, width, height);
    DC1394_ERR_RTN(err, "Unable to set format 7 image size");
    err=_dc1394_format7_set_image_position(camera, video_mode, left, top);
    DC1394_ERR_RTN(err, "Unable to set format 7 image position");
    // do handshaking to be sure that the value is now effective
    err=_dc1394_v130_handshake(camera, video_mode);
    DC1394_ERR_RTN(err, "Handshaking failed after setting size and position");

    // ===========================================================
    // PACKET SIZE
    // ===========================================================

    if (packet_size==DC1394_QUERY_FROM_CAMERA) {
        err=dc1394_format7_get_packet_size(camera, video_mode, &uint_packet_size);
        DC1394_ERR_RTN(err, "Unable to get F7 packet size");
        packet_size=uint_packet_size;
    }

    switch (packet_size) {
    case DC1394_USE_RECOMMENDED:
        err=dc1394_format7_get_recommended_packet_size(camera, video_mode, &recom_packet_size);
        DC1394_ERR_RTN(err, "Recommended packet size inq error");
        if (recom_packet_size>0) {
            packet_size=recom_packet_size;
        }
        else { // recom. bpp asked, but register is 0. IGNORED
            err=dc1394_format7_get_packet_parameters(camera, video_mode, &unit_bytes, &max_bytes); /* PACKET_PARA_INQ */
            DC1394_ERR_RTN(err, "Packet para inq error");
            dc1394_log_warning("Recommended packet size asked, but register is zero for mode %d. Falling back to MAX packet size", video_mode);
            packet_size=max_bytes;
        }
        break;
    case DC1394_USE_MAX_AVAIL:
        err=dc1394_format7_get_packet_parameters(camera, video_mode, &unit_bytes, &max_bytes); /* PACKET_PARA_INQ */
        DC1394_ERR_RTN(err, "Packet para inq error");
        packet_size = max_bytes;
        break;
    case DC1394_QUERY_FROM_CAMERA:
        // if we wanted QUERY_FROM_CAMERA, the QUERY_FROM_CAMERA value has been overwritten by
        // the current value at the beginning of the program. It is thus not possible to reach this code fragment.
        dc1394_log_error("Packet size error: we should not reach this code region");
        break;
    default:
        err=dc1394_format7_get_packet_parameters(camera, video_mode, &unit_bytes, &max_bytes); /* PACKET_PARA_INQ */
        DC1394_ERR_RTN(err, "Packet para inq error");
        // we have to take several tricks into account here:
        // 1) BPP could be zero, in which case it becomes MAX_BPP
        // 2) UNIT_BYTES could also be zero, in which case we force it to MAX_BPP.
        //    This actually further forces BPP to be set to MAX_BPP too.

        if (unit_bytes==0) {
            unit_bytes=max_bytes;
        }
        if (packet_size > max_bytes) {
            packet_size = max_bytes;
        }
        else {
            if (packet_size < unit_bytes) {
                packet_size = unit_bytes;
            }
        }
        packet_size-=packet_size % unit_bytes;
        break;
    }

    // set bpp:
    err=_dc1394_format7_set_packet_size(camera, video_mode, packet_size);
    DC1394_ERR_RTN(err, "Unable to set format 7 packet_size");

    // IIDC v1.30 handshaking:
    err=_dc1394_v130_handshake(camera, video_mode);
    DC1394_ERR_RTN(err, "F7 handshake failure");

    return err;
}


dc1394error_t
dc1394_format7_get_roi(dc1394camera_t *camera,
                       dc1394video_mode_t video_mode,
                       dc1394color_coding_t *color_coding,
                       uint32_t *packet_size,
                       uint32_t *left,  uint32_t *top,
                       uint32_t *width, uint32_t *height)
{
    dc1394error_t err;

    err=dc1394_format7_get_color_coding(camera, video_mode, color_coding);
    DC1394_ERR_RTN(err, "Unable to get color_coding");

    err=dc1394_format7_get_packet_size(camera, video_mode, packet_size);
    DC1394_ERR_RTN(err, "Unable to get F7 bpp");

    err=dc1394_format7_get_image_position(camera, video_mode, left, top);
    DC1394_ERR_RTN(err, "Unable to get image position");

    err=dc1394_format7_get_image_size(camera, video_mode, width, height);
    DC1394_ERR_RTN(err, "Unable to get image size");

    return err;
}