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added support for the elusive AVI palette change chunk, courtesy of

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Kostya <cannonball at bw-team.com>

Originally committed as revision 3467 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Mike Melanson 2004-09-16 02:14:50 +00:00
parent 48cb67c62a
commit 69bde0b258
1 changed files with 26 additions and 0 deletions
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26
libavformat/avidec.c
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@ -490,6 +490,32 @@ static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
return size;
}
}
/* palette changed chunk */
if ( d[0] >= '0' && d[0] <= '9'
&& d[1] >= '0' && d[1] <= '9'
&& ((d[2] == 'p' && d[3] == 'c'))
&& n < s->nb_streams && i + size <= avi->movi_end) {
AVStream *st;
int first, clr, flags, k, p;
st = s->streams[n];
first = get_byte(pb);
clr = get_byte(pb);
flags = get_le16(pb);
p = 4;
for (k = first; k < clr + first; k++) {
int r, g, b;
r = get_byte(pb);
g = get_byte(pb);
b = get_byte(pb);
get_byte(pb);
st->codec.palctrl->palette[k] = b + (g << 8) + (r << 16);
}
st->codec.palctrl->palette_changed = 1;
}
}
return -1;