Filter SDK/C API

The header, avisynth_c.h, declares all the classes, structures and miscellaneous constants that you might need when writing a plugin. All external plugins should #include it:

#include "avisynth_c.h"

source: http://forum.doom9.org/showthread.php?p=1464911#post1464911

compiling plugins: http://forum.doom9.org/showthread.php?p=1092380#post1092380

example: http://forum.doom9.org/showthread.php?p=1001260#post1001260

For now the api is described here: http://www.kevina.org/avisynth_c/api.html . An example is given here: http://www.kevina.org/avisynth_c/example.html .

In v2.60 (AVISYNTH_INTERFACE_VERSION = 5) the following functions are added to the C interface:

 avs_is_yv24
 avs_is_yv16
 avs_is_yv12
 avs_is_yv411
 avs_is_y8
 avs_is_color_space
 avs_get_plane_width_subsampling
 avs_get_plane_height_subsampling
 avs_bits_per_pixel
 avs_bytes_from_pixels
 avs_row_size
 avs_bmp_size
 avs_get_row_size_p
 avs_get_height_p