closedcaption/{scc,mcc}parse: Allow an optional UTF-8 BOM at the beginning

Some software is apparently writing an UTF-8 BOM at the beinning of the
file.

2 files changed, 6 insertions, 1 deletions

diff --git a/video/closedcaption/src/mcc_parser.rs b/video/closedcaption/src/mcc_parser.rs
index 70e221ee5..c2ec97069 100644
--- a/video/closedcaption/src/mcc_parser.rs
+++ b/video/closedcaption/src/mcc_parser.rs
@@ -129,6 +129,7 @@ where
     I::Error: ParseError<I::Token, I::Range, I::Position>,
 {
     (
+        optional(range(&[0xEFu8, 0xBBu8, 0xBFu8][..])),
         range(b"File Format=MacCaption_MCC V".as_ref()),
         choice!(range(b"1.0".as_ref()), range(b"2.0".as_ref())),
         end_of_line(),
diff --git a/video/closedcaption/src/scc_parser.rs b/video/closedcaption/src/scc_parser.rs
index 440b8df25..bd02f3e94 100644
--- a/video/closedcaption/src/scc_parser.rs
+++ b/video/closedcaption/src/scc_parser.rs
@@ -120,7 +120,11 @@ where
     I: RangeStream<Token = u8, Range = &'a [u8]>,
     I::Error: ParseError<I::Token, I::Range, I::Position>,
 {
-    (range(b"Scenarist_SCC V1.0".as_ref()), end_of_line())
+    (
+        optional(range(&[0xEFu8, 0xBBu8, 0xBFu8][..])),
+        range(b"Scenarist_SCC V1.0".as_ref()),
+        end_of_line(),
+    )
         .map(|_| SccLine::Header)
         .message("while parsing header")
 }