av_dlog(s, "wanted_pts=%0.6f\n", wanted_pts / 1000000.0);
/* find the position using linear interpolation (better than
dichotomy in typical cases) */
- pos_min = FFM_PACKET_SIZE;
- pos_max = ffm->file_size - FFM_PACKET_SIZE;
+ if (ffm->write_index < ffm->file_size) {
+ if (get_dts(s, FFM_PACKET_SIZE) < wanted_pts) {
+ pos_min = FFM_PACKET_SIZE;
+ pos_max = ffm->write_index - FFM_PACKET_SIZE;
+ } else {
+ pos_min = ffm->write_index;
+ pos_max = ffm->file_size - FFM_PACKET_SIZE;
+ }
+ } else {
+ pos_min = FFM_PACKET_SIZE;
+ pos_max = ffm->file_size - FFM_PACKET_SIZE;
+ }
while (pos_min <= pos_max) {
pts_min = get_dts(s, pos_min);
pts_max = get_dts(s, pos_max);
+ if (pts_min > wanted_pts || pts_max < wanted_pts) {
+ pos = pts_min > wanted_pts ? pos_min : pos_max;
+ goto found;
+ }
/* linear interpolation */
pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) /
(double)(pts_max - pts_min);