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baseparse: avoid loop in frame locating interpolation

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Mark Nauwelaerts 2011-01-14 14:08:38 +01:00 committed by Tim-Philipp Müller
parent eafcdf67b9
commit ce23c62f58
1 changed files with 4 additions and 3 deletions
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7
gst/audioparsers/gstbaseparse.c
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@ -3032,6 +3032,7 @@ gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
lpos - chunk;
} else {
/* should mean lpos == hpos, since lpos <= hpos is invariant */
newpos = lpos;
/* we check this case once, but not forever, so break loop */
cont = FALSE;
@ -3065,8 +3066,7 @@ gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
break;
} else if (newtime > time) {
/* overshoot */
newpos -= newpos == hpos ? chunk : 0;
hpos = CLAMP (newpos, lpos, hpos);
hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
htime = newtime;
} else if (newtime + tolerance > time) {
/* close enough undershoot */
@ -3076,9 +3076,10 @@ gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
} else if (newtime < ltime) {
/* so a position beyond lpos resulted in earlier time than ltime ... */
GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
break;
} else {
/* undershoot too far */
newpos += newpos == hpos ? chunk : 0;
newpos += newpos == lpos ? chunk : 0;
lpos = CLAMP (newpos, lpos, hpos);
ltime = newtime;
}