Binary searching would hang if the fragment items do NOT have timestamp for the
specified stream.
For example, a fmp4 consists of separated 'moof' boxes for each track, and
separated 'sidx' for each segment, but no 'mfra' box.
Then every fragment item only have the timestamp for one of its tracks.
Signed-off-by: Charles Liu <liuch...@gmail.com>
---
libavformat/mov.c | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 9b9739f788..35cb619e9f 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1266,7 +1266,7 @@ static int64_t get_frag_time(MOVFragmentIndex *frag_index,
static int search_frag_timestamp(MOVFragmentIndex *frag_index,
AVStream *st, int64_t timestamp)
{
- int a, b, m;
+ int a, b, m, m0;
int64_t frag_time;
int id = -1;
@@ -1282,15 +1282,18 @@ static int search_frag_timestamp(MOVFragmentIndex
*frag_index,
b = frag_index->nb_items;
while (b - a > 1) {
- m = (a + b) >> 1;
- frag_time = get_frag_time(frag_index, m, id);
- if (frag_time != AV_NOPTS_VALUE) {
- if (frag_time >= timestamp)
- b = m;
- if (frag_time <= timestamp)
- a = m;
- }
+ m0 = m = (a + b) >> 1;
+
+ while (m < b &&
+ (frag_time = get_frag_time(frag_index, m, id)) ==
AV_NOPTS_VALUE)
+ m++;
+
+ if (m < b && frag_time <= timestamp)
+ a = m;
+ else
+ b = m0;
}
+
return a;
}
--
2.20.1
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