avformat/assdec: allow ASS files starting with empty lines

See https://github.com/mpv-player/mpv/issues/2506

avformat/assdec: allow ASS files starting with empty lines
See https://github.com/mpv-player/mpv/issues/2506
6679fcd4 · Clément Bœsch · Clément Bœsch · 7769e660 · 6679fcd4
Commit 6679fcd4 authored Nov 20, 2015 by Clément Bœsch Committed by Clément Bœsch Nov 20, 2015
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assdec.c libavformat/assdec.c +3 -0

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--- a/libavformat/assdec.c
+++ b/libavformat/assdec.c
@@ -39,6 +39,9 @@ static int ass_probe(AVProbeData *p)
    FFTextReader tr;
    ff_text_init_buf(&tr, p->buf, p->buf_size);

+    while (ff_text_peek_r8(&tr) == '\r' || ff_text_peek_r8(&tr) == '\n')
+        ff_text_r8(&tr);
+
    ff_text_read(&tr, buf, sizeof(buf));

    if (!memcmp(buf, "[Script Info]", 13))