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ff_gen_search: Fix finding the maximum timestamp in a really small file 

Fixes Assertion failure

Found-by: durandal_1707
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-02-18 20:18:19 +01:00
parent 695a766bff
commit 6cd650dbd2
2 changed files with 38 additions and 20 deletions
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4
libavformat/utils.c
View File

@ -1863,10 +1863,10 @@ int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
filesize = avio_size(s->pb);
pos_max = filesize - 1;
do{
pos_max -= step;
pos_max = FFMAX(0, pos_max - step);
ts_max = ff_read_timestamp(s, stream_index, &pos_max, pos_max + step, read_timestamp);
step += step;
}while(ts_max == AV_NOPTS_VALUE && pos_max >= step);
}while(ts_max == AV_NOPTS_VALUE && pos_max > 0);
if (ts_max == AV_NOPTS_VALUE)
return -1;

54
tests/ref/seek/lavf-ogg
View File

@ -1,35 +1,53 @@
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st:-1 flags:0 ts:-1.000000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret:-1 st:-1 flags:1 ts: 1.894167
ret:-1 st: 0 flags:0 ts: 0.788345
ret: 0 st:-1 flags:1 ts: 1.894167
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st: 0 flags:0 ts: 0.788345
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st: 0 flags:1 ts:-0.317506
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret:-1 st:-1 flags:0 ts: 2.576668
ret:-1 st:-1 flags:1 ts: 1.470835
ret:-1 st: 0 flags:0 ts: 0.365011
ret: 0 st:-1 flags:0 ts: 2.576668
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st:-1 flags:1 ts: 1.470835
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st: 0 flags:0 ts: 0.365011
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st: 0 flags:1 ts:-0.740839
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret:-1 st:-1 flags:0 ts: 2.153336
ret:-1 st:-1 flags:1 ts: 1.047503
ret: 0 st:-1 flags:0 ts: 2.153336
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st:-1 flags:1 ts: 1.047503
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st: 0 flags:0 ts:-0.058322
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret:-1 st: 0 flags:1 ts: 2.835828
ret:-1 st:-1 flags:0 ts: 1.730004
ret:-1 st:-1 flags:1 ts: 0.624171
ret: 0 st: 0 flags:1 ts: 2.835828
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st:-1 flags:1 ts: 0.624171
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st: 0 flags:0 ts:-0.481655
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret:-1 st: 0 flags:1 ts: 2.412494
ret:-1 st:-1 flags:0 ts: 1.306672
ret:-1 st:-1 flags:1 ts: 0.200839
ret: 0 st: 0 flags:1 ts: 2.412494
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st:-1 flags:0 ts: 1.306672
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st:-1 flags:1 ts: 0.200839
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st: 0 flags:0 ts:-0.904989
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret:-1 st: 0 flags:1 ts: 1.989184
ret:-1 st:-1 flags:0 ts: 0.883340
ret: 0 st: 0 flags:1 ts: 1.989184
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st:-1 flags:0 ts: 0.883340
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st:-1 flags:1 ts:-0.222493
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret:-1 st: 0 flags:0 ts: 2.671678
ret:-1 st: 0 flags:1 ts: 1.565850
ret:-1 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:0 ts: 2.671678
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st: 0 flags:1 ts: 1.565850
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364
ret: 0 st:-1 flags:1 ts:-0.645825
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 143 size: 1364