all: use designated initializers for AVOption.unit

Makes it robust against adding fields before it, which will be useful in
following commits.

Majority of the patch generated by the following Coccinelle script:

@@
typedef AVOption;
identifier arr_name;
initializer list il;
initializer list[8] il1;
expression tail;
@@
AVOption arr_name[] = { il, { il1,
- tail
+ .unit = tail
}, ...  };

with some manual changes, as the script:
* has trouble with options defined inside macros
* sometimes does not handle options under an #else branch
* sometimes swallows whitespace

1 files changed, 2 insertions, 2 deletions

diff --git a/libavcodec/bsf/av1_metadata.c b/libavcodec/bsf/av1_metadata.c
index 41b02cc836..cb51d2eee6 100644
--- a/libavcodec/bsf/av1_metadata.c
+++ b/libavcodec/bsf/av1_metadata.c
@@ -179,7 +179,7 @@ static const AVOption av1_metadata_options[] = {
 
     { "color_range", "Set color range flag (section 6.4.2)",
         OFFSET(color_range), AV_OPT_TYPE_INT,
-        { .i64 = -1 }, -1, 1, FLAGS, "cr" },
+        { .i64 = -1 }, -1, 1, FLAGS, .unit = "cr" },
     { "tv", "TV (limited) range", 0, AV_OPT_TYPE_CONST,
         { .i64 = 0 }, .flags = FLAGS, .unit = "cr" },
     { "pc", "PC (full) range",    0, AV_OPT_TYPE_CONST,
@@ -187,7 +187,7 @@ static const AVOption av1_metadata_options[] = {
 
     { "chroma_sample_position", "Set chroma sample position (section 6.4.2)",
         OFFSET(chroma_sample_position), AV_OPT_TYPE_INT,
-        { .i64 = -1 }, -1, 3, FLAGS, "csp" },
+        { .i64 = -1 }, -1, 3, FLAGS, .unit = "csp" },
     { "unknown",   "Unknown chroma sample position",  0, AV_OPT_TYPE_CONST,
         { .i64 = AV1_CSP_UNKNOWN },   .flags = FLAGS, .unit = "csp" },
     { "vertical",  "Left chroma sample position",     0, AV_OPT_TYPE_CONST,