61 static double avpriv_trc_bt709(double Lc)  in avpriv_trc_bt709()  argument
66     return (0.0 > Lc) ? 0.0  in avpriv_trc_bt709()
67          : (  b > Lc) ? 4.500 * Lc  in avpriv_trc_bt709()
68          :              a * pow(Lc, 0.45) - (a - 1.0);  in avpriv_trc_bt709()
71 static double avpriv_trc_gamma22(double Lc)  in avpriv_trc_gamma22()  argument
73     return (0.0 > Lc) ? 0.0 : pow(Lc, 1.0/ 2.2);  in avpriv_trc_gamma22()
76 static double avpriv_trc_gamma28(double Lc)  in avpriv_trc_gamma28()  argument
78     return (0.0 > Lc) ? 0.0 : pow(Lc, 1.0/ 2.8);  in avpriv_trc_gamma28()
81 static double avpriv_trc_smpte240M(double Lc)  in avpriv_trc_smpte240M()  argument
86     return (0.0 > Lc) ? 0.0  in avpriv_trc_smpte240M()
87          : (  b > Lc) ? 4.000 * Lc  in avpriv_trc_smpte240M()
88          :              a * pow(Lc, 0.45) - (a - 1.0);  in avpriv_trc_smpte240M()
91 static double avpriv_trc_linear(double Lc)  in avpriv_trc_linear()  argument
93     return Lc;  in avpriv_trc_linear()
96 static double avpriv_trc_log(double Lc)  in avpriv_trc_log()  argument
98     return (0.01 > Lc) ? 0.0 : 1.0 + log10(Lc) / 2.0;  in avpriv_trc_log()
101 static double avpriv_trc_log_sqrt(double Lc)  in avpriv_trc_log_sqrt()  argument
104     return (0.00316227766 > Lc) ? 0.0 : 1.0 + log10(Lc) / 2.5;  in avpriv_trc_log_sqrt()
107 static double avpriv_trc_iec61966_2_4(double Lc)  in avpriv_trc_iec61966_2_4()  argument
112     return (-b >= Lc) ? -a * pow(-Lc, 0.45) + (a - 1.0)  in avpriv_trc_iec61966_2_4()
113          : ( b >  Lc) ? 4.500 * Lc  in avpriv_trc_iec61966_2_4()
114          :               a * pow( Lc, 0.45) - (a - 1.0);  in avpriv_trc_iec61966_2_4()
117 static double avpriv_trc_bt1361(double Lc)  in avpriv_trc_bt1361()  argument
122     return (-0.0045 >= Lc) ? -(a * pow(-4.0 * Lc, 0.45) + (a - 1.0)) / 4.0  in avpriv_trc_bt1361()
123          : ( b >  Lc) ? 4.500 * Lc  in avpriv_trc_bt1361()
124          :               a * pow( Lc, 0.45) - (a - 1.0);  in avpriv_trc_bt1361()
127 static double avpriv_trc_iec61966_2_1(double Lc)  in avpriv_trc_iec61966_2_1()  argument
132     return (0.0 > Lc) ? 0.0  in avpriv_trc_iec61966_2_1()
133          : (  b > Lc) ? 12.92 * Lc  in avpriv_trc_iec61966_2_1()
134          :              a * pow(Lc, 1.0  / 2.4) - (a - 1.0);  in avpriv_trc_iec61966_2_1()
137 static double avpriv_trc_smpte_st2084(double Lc)  in avpriv_trc_smpte_st2084()  argument
144     const double L  = Lc / 10000.0;  in avpriv_trc_smpte_st2084()
147     return (0.0 > Lc) ? 0.0  in avpriv_trc_smpte_st2084()
152 static double avpriv_trc_smpte_st428_1(double Lc)  in avpriv_trc_smpte_st428_1()  argument
154     return (0.0 > Lc) ? 0.0  in avpriv_trc_smpte_st428_1()
155          :              pow(48.0 * Lc / 52.37, 1.0 / 2.6);  in avpriv_trc_smpte_st428_1()
159 static double avpriv_trc_arib_std_b67(double Lc) {  in avpriv_trc_arib_std_b67()  argument
166     return (0.0 > Lc) ? 0.0 :  in avpriv_trc_arib_std_b67()
167         (Lc <= 1.0 / 12.0 ? sqrt(3.0 * Lc) : a * log(12.0 * Lc - b) + c);  in avpriv_trc_arib_std_b67()