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utils.h
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/* * 1394-Based Digital Camera Control Library * * Utilities * * 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 */ #ifndef __DC1394_UTILS_H__ #define __DC1394_UTILS_H__ /*! \file dc1394/utils.h \brief Utility functions \author Damien Douxchamps: coding \author Peter Antoniac: documentation maintainer More details soon */ #ifdef __cplusplus extern "C" { #endif /** * Returns the image width and height (in pixels) corresponding to a video mode. Works for scalable and non-scalable video modes. */ dc1394error_t dc1394_get_image_size_from_video_mode(dc1394camera_t *camera, uint32_t video_mode, uint32_t *width, uint32_t *height); /** * Returns the given framerate as a float. */ dc1394error_t dc1394_framerate_as_float(dc1394framerate_t framerate_enum, float *framerate); /** * Returns the number of bits per pixel for a certain color coding. This is the size of the data sent on the bus, the effective * data depth may vary. Example: RGB16 is 16, YUV411 is 8, YUV422 is 8. */ dc1394error_t dc1394_get_color_coding_data_depth(dc1394color_coding_t color_coding, uint32_t * bits); /** * Returns the bit-space used by a pixel. This is different from the data depth! For instance, RGB16 has a bit space of 48 bits, * YUV422 is 16bits and YU411 is 12bits. */ dc1394error_t dc1394_get_color_coding_bit_size(dc1394color_coding_t color_coding, uint32_t* bits); /** * Returns the color coding from the video mode. Works with scalable image formats too. */ dc1394error_t dc1394_get_color_coding_from_video_mode(dc1394camera_t *camera, dc1394video_mode_t video_mode, dc1394color_coding_t *color_coding); /** * Tells whether the color mode is color or monochrome */ dc1394error_t dc1394_is_color(dc1394color_coding_t color_mode, dc1394bool_t *is_color); /** * Tells whether the video mode is scalable or not. */ dc1394bool_t dc1394_is_video_mode_scalable(dc1394video_mode_t video_mode); /** * Tells whether the video mode is "still image" or not ("still image" is currently not supported by any cameras on the market) */ dc1394bool_t dc1394_is_video_mode_still_image(dc1394video_mode_t video_mode); /** * Tells whether two IDs refer to the same physical camera unit. */ dc1394bool_t dc1394_is_same_camera(dc1394camera_id_t id1, dc1394camera_id_t id2); /** * Returns a descriptive name for a feature */ const char * dc1394_feature_get_string(dc1394feature_t feature); /** * Returns a descriptive string for an error code */ const char * dc1394_error_get_string(dc1394error_t error); /** * Calculates the CRC16 checksum of a memory region. Useful to verify the CRC of an image buffer, for instance. */ uint16_t dc1394_checksum_crc16 (const uint8_t* buffer, uint32_t buffer_size); #ifdef __cplusplus } #endif #endif /* _DC1394_UTILS_H */