static int decode_buffering_period(H264Context *h) { unsigned int sps_id; int sched_sel_idx; SPS *sps; sps_id = get_ue_golomb_31(&h->gb); if (sps_id > 31 || !h->sps_buffers[sps_id]) { av_log(h->avctx, AV_LOG_ERROR, "non-existing SPS %d referenced in buffering period\n", sps_id); return AVERROR_INVALIDDATA; } sps = h->sps_buffers[sps_id]; // NOTE: This is really so duplicated in the standard... See H.264, D.1.1 if (sps->nal_hrd_parameters_present_flag) { for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) { h->initial_cpb_removal_delay[sched_sel_idx] = get_bits(&h->gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset skip_bits(&h->gb, sps->initial_cpb_removal_delay_length); } } if (sps->vcl_hrd_parameters_present_flag) { for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) { h->initial_cpb_removal_delay[sched_sel_idx] = get_bits(&h->gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset skip_bits(&h->gb, sps->initial_cpb_removal_delay_length); } } h->sei_buffering_period_present = 1; return 0; }