os/linux-2.6-tag--devboard-R2_10-4/arch/cris/arch-v32/drivers/elphel/gamma_tables.h

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//gamma_tables.h
#ifndef _GAMMA_TABLES_H
#define _GAMMA_TABLES_H

void init_gammas(void);
int is_gamma_current (unsigned short hash16, unsigned short scale, int index);
int is_gamma_valid  (unsigned short hash16, unsigned short scale, int index);
//             int prev_locked_color[4];

int unlock_gamma_node (int color); 



unsigned long * get_gamma_fpga(int color);

int gamma_new_node(void);
void gamma_encode_fpga(unsigned short * gamma_in, unsigned long * gamma_out);
void  gamma_calc_scaled (unsigned short scale,unsigned short * gamma_in, unsigned short * gamma_out);
//void  gamma_calc_reverse(unsigned short * gamma_in, unsigned short * gamma_out);/// calculate reverse gamma table (16-bit output) that matches 1-byte gamma-converted data to the input data (in the 0..ffff range)
void  gamma_calc_reverse(unsigned short * gamma_in, unsigned char * gamma_out);




// #define GAMMA_MODE_NOT_NICE     1  // if set, no interrupts will be enabled between steps, whole operation is atomic
// #define GAMMA_MODE_NEED_REVERSE 2  // reverse gamma table is needed
// #define GAMMA_MODE_HARDWARE     4  // the table is needed to program FPGA: fpga-encoded table will be calculated (if not yet), node will be locked for specified
                                   // color/frame pair
int set_gamma_table (unsigned short hash16, unsigned short scale, unsigned short * gamma_proto,  unsigned char mode, int color);
unsigned long get_locked_hash32(int color);
#endif

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