uint32_t rtp_compute_ts( unsigned i_clock_rate, int64_t i_pts )
{
- /* NOTE: this plays nice with offsets because the calculations are
- * linear. */
- return i_pts * (int64_t)i_clock_rate / CLOCK_FREQ;
+ /* This is an overflow-proof way of doing:
+ * return i_pts * (int64_t)i_clock_rate / CLOCK_FREQ;
+ *
+ * NOTE: this plays nice with offsets because the (equivalent)
+ * calculations are linear. */
+ lldiv_t q = lldiv(i_pts, CLOCK_FREQ);
+ return q.quot * (int64_t)i_clock_rate
+ + q.rem * (int64_t)i_clock_rate / CLOCK_FREQ;
}
/** Add an ES as a new RTP stream */