Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
A function that is in seek-preproc.c
int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
int64_t target_ts, int flags)
{
const AVInputFormat *const avif = s->iformat;
int64_t pos_min=pos_min, pos_max=pos_max, pos, pos_limit;
int64_t ts_min, ts_max, ts;
int index;
int64_t ret;
AVStream *st;
FFStream *sti;
if (stream_index < 0)
return -1;
av_log(s, 56, "read_seek: %d %s\n", stream_index, av_ts_make_string((char[32]){0}, target_ts));
ts_max =
ts_min = ((int64_t)0x8000000000000000UL);
pos_limit = -1;
st = s->streams[stream_index];
sti = ffstream(st);
if (sti->index_entries) {
const AVIndexEntry *e;
index = av_index_search_timestamp(st, target_ts,
flags | 1);
index = ((index) > (0) ? (index) : (0));
e = &sti->index_entries[index];
if (e->timestamp <= target_ts || e->pos == e->min_distance) {
pos_min = e->pos;
ts_min = e->timestamp;
av_log(s, 56, "using cached pos_min=0x%""l" "x"" dts_min=%s\n",
pos_min, av_ts_make_string((char[32]){0}, ts_min));
} else {
((void)0);
}
index = av_index_search_timestamp(st, target_ts,
flags & ~1);
do { if (!(index < sti->nb_index_entries)) { av_log(((void*)0), 0, "Assertion %s failed at %s:%d\n", "index < sti->nb_index_entries", "src/libavformat/seek.c", 325); abort(); } } while (0);
if (index >= 0) {
e = &sti->index_entries[index];
((void)0);
pos_max = e->pos;
ts_max = e->timestamp;
pos_limit = pos_max - e->min_distance;
av_log(s, 56, "using cached pos_max=0x%""l" "x"" pos_limit=0x%""l" "x"
" dts_max=%s\n", pos_max, pos_limit, av_ts_make_string((char[32]){0}, ts_max));
}
}
pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
ts_min, ts_max, flags, &ts, avif->read_timestamp);
if (pos < 0)
return -1;
if ((ret = avio_seek(s->pb, pos, 0)) < 0)
return ret;
ff_read_frame_flush(s);
avpriv_update_cur_dts(s, st, ts);
return 0;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment