csputils: Add support for Display P3 primaries

video/csputils.c

@@ -66,6 +66,7 @@ const struct m_opt_choice_alternatives mp_csp_prim_names[] = {
     {"prophoto",    MP_CSP_PRIM_PRO_PHOTO},
     {"cie1931",     MP_CSP_PRIM_CIE_1931},
     {"dci-p3",      MP_CSP_PRIM_DCI_P3},
+    {"display-p3",  MP_CSP_PRIM_DISPLAY_P3},
     {"v-gamut",     MP_CSP_PRIM_V_GAMUT},
     {"s-gamut",     MP_CSP_PRIM_S_GAMUT},
     {0}
@@ -433,13 +434,14 @@ struct mp_csp_primaries mp_get_csp_primaries(enum mp_csp_prim spc)
             .blue  = {0.1666, 0.0089},
             .white = e
         };
-    // From SMPTE RP 431-2
+    // From SMPTE RP 431-2 and 432-1
     case MP_CSP_PRIM_DCI_P3:
+    case MP_CSP_PRIM_DISPLAY_P3:
         return (struct mp_csp_primaries) {
             .red   = {0.680, 0.320},
             .green = {0.265, 0.690},
             .blue  = {0.150, 0.060},
-            .white = dci
+            .white = spc == MP_CSP_PRIM_DCI_P3 ? dci : d65
         };
     // From Panasonic VARICAM reference manual
     case MP_CSP_PRIM_V_GAMUT:

video/csputils.h

@@ -64,6 +64,7 @@ enum mp_csp_prim {
     MP_CSP_PRIM_PRO_PHOTO,
     MP_CSP_PRIM_CIE_1931,
     MP_CSP_PRIM_DCI_P3,
+    MP_CSP_PRIM_DISPLAY_P3,
     MP_CSP_PRIM_V_GAMUT,
     MP_CSP_PRIM_S_GAMUT,
     MP_CSP_PRIM_COUNT