Fixes an integer underflow in calc_min_seg_no in cases where
availability_start_time - time_shift_buffer_depth is negative (i.e. the stream
started within one time_shift_buffer_depth window).
---
libavformat/dashdec.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
index 500d8ca..4a0b368 100644
--- a/libavformat/dashdec.c
+++ b/libavformat/dashdec.c
@@ -1438,8 +1438,15 @@ static int64_t calc_min_seg_no(AVFormatContext *s,
struct representation *pls)
int64_t num = 0;
if (c->is_live && pls->fragment_duration) {
+ uint64_t current_time_in_sec = get_current_time_in_sec();
av_log(s, AV_LOG_TRACE, "in live mode\n");
- num = pls->first_seq_no + (((get_current_time_in_sec() -
c->availability_start_time) - c->time_shift_buffer_depth) *
pls->fragment_timescale) / pls->fragment_duration;
+ if (current_time_in_sec - c->availability_start_time <
c->time_shift_buffer_depth) {
+ av_log(s, AV_LOG_TRACE, "timeShiftBufferDepth not reached yet\n");
+ num = pls->first_seq_no;
+ }
+ else {
+ num = pls->first_seq_no + (((current_time_in_sec -
c->availability_start_time) - c->time_shift_buffer_depth) *
pls->fragment_timescale) / pls->fragment_duration;
+ }
} else {
num = pls->first_seq_no;
}
--
2.48.1
_______________________________________________
ffmpeg-devel mailing list -- [email protected]
To unsubscribe send an email to [email protected]
