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Simplify conversion to 5-bit ASCII.

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Originally committed as revision 21557 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2010-01-30 21:50:47 +00:00
parent c676895fd9
commit 832ec42858
1 changed files with 4 additions and 5 deletions
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9
libavformat/isom.c
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@ -283,13 +283,12 @@ int ff_mov_iso639_to_lang(const char *lang, int mp4)
lang = "und";
/* 5bit ascii */
for (i = 0; i < 3; i++) {
unsigned char c = (unsigned char)lang[i];
if (c < 0x60)
return -1;
if (c > 0x60 + 0x1f)
uint8_t c = lang[i];
c -= 0x60;
if (c > 0x1f)
return -1;
code <<= 5;
code |= (c - 0x60);
code |= c;
}
return code;
}