36c34fa58f
git-svn-id: https://svn.code.sf.net/p/gphoto/code/trunk/libgphoto2@853 67ed7778-7388-44ab-90cf-0a291f65f57c
84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
/****************************************************************/
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/* lowlevel.c - Implementation of the protocol defining the way */
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/* how to send and receive bytes to and from the */
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/* camera. */
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/* */
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/* Copyright (C) 2000 The Free Software Foundation */
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/* */
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/* Author: Lutz Müller <Lutz.Mueller@stud.uni-karlsruhe.de> */
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/* */
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/* This program is free software; you can redistribute it */
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/* and/or modify it under the terms of the GNU General Public */
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/* License as published by the Free Software Foundation; either */
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/* version 2 of the License, or (at your option) any later */
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/* version. */
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/* */
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/* This program is distributed in the hope that it will be */
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/* useful, but WITHOUT ANY WARRANTY; without even the implied */
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/* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR */
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/* PURPOSE. See the GNU General Public License for more */
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/* details. */
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/* */
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/* You should have received a copy of the GNU General Public */
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/* License along with this program; if not, write to the Free */
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/* Software Foundation, Inc., 59 Temple Place, Suite 330, */
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/* Boston, MA 02111-1307, USA. */
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/****************************************************************/
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/****************************************************************/
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/* Type Definitions */
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/****************************************************************/
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typedef enum {
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L_SUCCESS,
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L_TRANSMISSION_ERROR,
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L_IO_ERROR
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} l_return_status_t;
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/****************************************************************/
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/* Prototypes */
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/****************************************************************/
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l_return_status_t l_init (konica_data_t *konica_data);
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l_return_status_t l_exit (konica_data_t *konica_data);
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/****************************************************************/
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/* Some comments on the structure of send_buffer, image_buffer, */
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/* and receive_buffer: */
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/* */
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/* send_buffer: The first two bytes are low order and high */
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/* byte of the command, followed by at least two */
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/* more bytes. The number of sent bytes has to be */
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/* even. */
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/* */
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/* image_buffer: This buffer will contain raw data like */
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/* jpeg or exif data. */
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/* */
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/* receive_buffer: The first two bytes will be the same as */
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/* in send_buffer. This will be checked */
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/* here. Then will follow low and high */
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/* order byte of the return status. After */
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/* that, depending on command and return */
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/* status, other bytes will follow. */
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/****************************************************************/
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l_return_status_t l_send_receive (
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konica_data_t *konica_data,
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guchar *send_buffer,
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guint send_buffer_size,
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guchar **receive_buffer,
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guint *receive_buffer_size);
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l_return_status_t l_send_receive_receive (
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konica_data_t *konica_data,
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guchar *send_buffer,
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guint send_buffer_size,
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guchar **image_buffer,
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guint *image_buffer_size,
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guchar **receive_buffer,
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guint *receive_buffer_size,
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guint timeout);
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