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csputils: add support for BT.470-M 

For some kind of legacy TV system, who knows? But ffmpeg supports it,
and it's cheap for us to add.
This commit is contained in:
Niklas Haas 2015-02-27 21:10:09 +01:00
parent 73c5c3df53
commit 076b3d1385
2 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
video/csputils.c
View File

@ -62,6 +62,7 @@ const char *const mp_csp_prim_names[MP_CSP_PRIM_COUNT] = {
"BT.601 (625-line SD)",
"BT.709 (HD)",
"BT.2020 (UHD)",
"BT.470 M",
};
const char *const mp_csp_equalizer_names[MP_CSP_EQ_COUNT] = {
@ -136,6 +137,7 @@ enum mp_csp_prim avcol_pri_to_mp_csp_prim(int avpri)
#if HAVE_AVCOL_SPC_BT2020
case AVCOL_PRI_BT2020: return MP_CSP_PRIM_BT_2020;
#endif
case AVCOL_PRI_BT470M: return MP_CSP_PRIM_BT_470M;
default: return MP_CSP_PRIM_AUTO;
}
}
@ -174,6 +176,7 @@ int mp_csp_prim_to_avcol_pri(enum mp_csp_prim prim)
#if HAVE_AVCOL_SPC_BT2020
case MP_CSP_PRIM_BT_2020: return AVCOL_PRI_BT2020;
#endif
case MP_CSP_PRIM_BT_470M: return AVCOL_PRI_BT470M;
default: return AVCOL_PRI_UNSPECIFIED;
}
}
@ -276,8 +279,9 @@ static void mp_mul_matrix3x3(float a[3][3], float b[3][3])
struct mp_csp_primaries mp_get_csp_primaries(enum mp_csp_prim spc)
{
/*
Values from: ITU-R Recommendations BT.601-7, BT.709-5, BT.2020-0
Values from: ITU-R Recommendations BT.470-6, BT.601-7, BT.709-5, BT.2020-0
https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.470-6-199811-S!!PDF-E.pdf
https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.601-7-201103-I!!PDF-E.pdf
https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.709-5-200204-I!!PDF-E.pdf
https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.2020-0-201208-I!!PDF-E.pdf
@ -286,6 +290,13 @@ struct mp_csp_primaries mp_get_csp_primaries(enum mp_csp_prim spc)
static const struct mp_csp_col_xy d65 = {0.3127, 0.3290};
switch (spc) {
case MP_CSP_PRIM_BT_470M:
return (struct mp_csp_primaries) {
.red = {0.670, 0.330},
.green = {0.210, 0.710},
.blue = {0.140, 0.080},
.white = {0.310, 0.316} // Illuminant C
};
case MP_CSP_PRIM_BT_601_525:
return (struct mp_csp_primaries) {
.red = {0.630, 0.340},

1
video/csputils.h
View File

@ -64,6 +64,7 @@ enum mp_csp_prim {
MP_CSP_PRIM_BT_601_625,
MP_CSP_PRIM_BT_709,
MP_CSP_PRIM_BT_2020,
MP_CSP_PRIM_BT_470M,
MP_CSP_PRIM_COUNT
};