avcodec/prores_metadata_bsf: add arib-std-b67 format support

It's based on the following specs:
RDD 45:2017 - SMPTE Registered Disclosure Doc - Interoperable Master Format - Application ProRes
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>

doc/bitstream_filters.texi

@@ -591,6 +591,8 @@ Keep the same transfer characteristics property (default).
 BT 601, BT 709, BT 2020
 @item smpte2084
 SMPTE ST 2084
+@item arib-std-b67
+ARIB STD-B67
 @end table
 
 
@@ -616,6 +618,11 @@ Set Rec709 colorspace for each frame of the file
 ffmpeg -i INPUT -c copy -bsf:v prores_metadata=color_primaries=bt709:color_trc=bt709:colorspace=bt709 output.mov
 @end example
 
+Set Hybrid Log-Gamma parameters for each frame of the file
+@example
+ffmpeg -i INPUT -c copy -bsf:v prores_metadata=color_primaries=bt2020:color_trc=arib-std-b67:colorspace=bt2020nc output.mov
+@end example
+
 @section remove_extra
 
 Remove extradata from packets.

libavcodec/prores_metadata_bsf.c

@@ -145,6 +145,7 @@ static const AVOption options[] = {
     {"unknown",                        NULL,  0, AV_OPT_TYPE_CONST, {.i64=0},                                INT_MIN, INT_MAX, FLAGS, "color_trc"},
     {"bt709",                          NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT709},                  INT_MIN, INT_MAX, FLAGS, "color_trc"},
     {"smpte2084",                      NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE2084},              INT_MIN, INT_MAX, FLAGS, "color_trc"},
+    {"arib-std-b67",                   NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_ARIB_STD_B67},           INT_MIN, INT_MAX, FLAGS, "color_trc"},
 
     {"colorspace", "select colorspace", OFFSET(matrix_coefficients), AV_OPT_TYPE_INT, {.i64=-1}, -1,  AVCOL_SPC_BT2020_NCL, FLAGS, "colorspace"},
     {"auto", "keep the same colorspace",  0, AV_OPT_TYPE_CONST, {.i64=-1},                            INT_MIN, INT_MAX, FLAGS, "colorspace"},