return mode;
}
+
+int ff_h264_parse_ref_count(int *plist_count, int ref_count[2],
+ GetBitContext *gb, const PPS *pps,
+ int slice_type_nos, int picture_structure, void *logctx)
+{
+ int list_count;
+ int num_ref_idx_active_override_flag;
+
+ // set defaults, might be overridden a few lines later
+ ref_count[0] = pps->ref_count[0];
+ ref_count[1] = pps->ref_count[1];
+
+ if (slice_type_nos != AV_PICTURE_TYPE_I) {
+ unsigned max[2];
+ max[0] = max[1] = picture_structure == PICT_FRAME ? 15 : 31;
+
+ num_ref_idx_active_override_flag = get_bits1(gb);
+
+ if (num_ref_idx_active_override_flag) {
+ ref_count[0] = get_ue_golomb(gb) + 1;
+ if (slice_type_nos == AV_PICTURE_TYPE_B) {
+ ref_count[1] = get_ue_golomb(gb) + 1;
+ } else
+ // full range is spec-ok in this case, even for frames
+ ref_count[1] = 1;
+ }
+
+ if (ref_count[0] - 1 > max[0] || ref_count[1] - 1 > max[1]) {
+ av_log(logctx, AV_LOG_ERROR, "reference overflow %u > %u or %u > %u\n",
+ ref_count[0] - 1, max[0], ref_count[1] - 1, max[1]);
+ ref_count[0] = ref_count[1] = 0;
+ *plist_count = 0;
+ goto fail;
+ }
+
+ if (slice_type_nos == AV_PICTURE_TYPE_B)
+ list_count = 2;
+ else
+ list_count = 1;
+ } else {
+ list_count = 0;
+ ref_count[0] = ref_count[1] = 0;
+ }
+
+ *plist_count = list_count;
+
+ return 0;
+fail:
+ *plist_count = 0;
+ ref_count[0] = 0;
+ ref_count[1] = 0;
+ return AVERROR_INVALIDDATA;
+}