: pow(48.0 * Lc / 52.37, 1.0 / 2.6);
}
+
+static double avpriv_trc_arib_std_b67(double Lc) {
+ // The function uses the definition from HEVC, which assumes that the peak
+ // white is input level = 1. (this is equivalent to scaling E = Lc * 12 and
+ // using the definition from the ARIB STD-B67 spec)
+ const double a = 0.17883277;
+ const double b = 0.28466892;
+ const double c = 0.55991073;
+ return (0.0 > Lc) ? 0.0 :
+ (Lc <= 1.0 / 12.0 ? sqrt(3.0 * Lc) : a * log(12.0 * Lc - b) + c);
+}
+
avpriv_trc_function avpriv_get_trc_function_from_trc(enum AVColorTransferCharacteristic trc)
{
avpriv_trc_function func = NULL;
func = avpriv_trc_smpte_st428_1;
break;
+ case AVCOL_TRC_ARIB_STD_B67:
+ func = avpriv_trc_arib_std_b67;
+ break;
+
case AVCOL_TRC_RESERVED0:
case AVCOL_TRC_UNSPECIFIED:
case AVCOL_TRC_RESERVED:
"bt470bg", "smpte170m", "smpte240m", "linear", "log100",
"log316", "iec61966-2-4", "bt1361e", "iec61966-2-1",
"bt2020-10", "bt2020-20", "smpte2084", "smpte428-1",
+ "arib-std-b67"
};
static const char *color_space_names[AVCOL_SPC_NB] = {
AVCOL_TRC_BT2020_12 = 15, ///< ITU-R BT2020 for 12 bit system
AVCOL_TRC_SMPTEST2084 = 16, ///< SMPTE ST 2084 for 10, 12, 14 and 16 bit systems
AVCOL_TRC_SMPTEST428_1 = 17, ///< SMPTE ST 428-1
+ AVCOL_TRC_ARIB_STD_B67 = 18, ///< ARIB STD-B67, known as "Hybrid log-gamma"
AVCOL_TRC_NB, ///< Not part of ABI
};
AVColorTransferCharacteristic=17 calling func(19845.889230) expected=43.490646
AVColorTransferCharacteristic=17 calling func(98678.423100) expected=80.593559
AVColorTransferCharacteristic=17 calling func(99999.899998) expected=81.006971
+AVColorTransferCharacteristic=18 calling func(-0.100000) expected=0.000000
+AVColorTransferCharacteristic=18 calling func(-0.018054) expected=0.000000
+AVColorTransferCharacteristic=18 calling func(-0.010000) expected=0.000000
+AVColorTransferCharacteristic=18 calling func(-0.004490) expected=0.000000
+AVColorTransferCharacteristic=18 calling func(0.000000) expected=0.000000
+AVColorTransferCharacteristic=18 calling func(0.003162) expected=0.097400
+AVColorTransferCharacteristic=18 calling func(0.005000) expected=0.122474
+AVColorTransferCharacteristic=18 calling func(0.009000) expected=0.164317
+AVColorTransferCharacteristic=18 calling func(0.015000) expected=0.212132
+AVColorTransferCharacteristic=18 calling func(0.100000) expected=0.544089
+AVColorTransferCharacteristic=18 calling func(1.000000) expected=1.000000
+AVColorTransferCharacteristic=18 calling func(52.370000) expected=1.712092
+AVColorTransferCharacteristic=18 calling func(125.098765) expected=1.867862
+AVColorTransferCharacteristic=18 calling func(1999.111230) expected=2.363502
+AVColorTransferCharacteristic=18 calling func(6945.443000) expected=2.586219
+AVColorTransferCharacteristic=18 calling func(15123.456700) expected=2.725380
+AVColorTransferCharacteristic=18 calling func(19845.889230) expected=2.773978
+AVColorTransferCharacteristic=18 calling func(98678.423100) expected=3.060803
+AVColorTransferCharacteristic=18 calling func(99999.899998) expected=3.063182