// FIXME do something with unavailable reference frames
/* Sort B-frames into display order */
-
- if (h->sps.bitstream_restriction_flag &&
- h->avctx->has_b_frames < h->sps.num_reorder_frames) {
- h->avctx->has_b_frames = h->sps.num_reorder_frames;
- h->low_delay = 0;
- }
-
- if (h->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT &&
- !h->sps.bitstream_restriction_flag) {
- h->avctx->has_b_frames = MAX_DELAYED_PIC_COUNT - 1;
- h->low_delay = 0;
+ if (h->sps.bitstream_restriction_flag ||
+ h->avctx->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
+ h->avctx->has_b_frames = FFMAX(h->avctx->has_b_frames, h->sps.num_reorder_frames);
}
+ h->low_delay = !h->avctx->has_b_frames;
pics = 0;
while (h->delayed_pic[pics])
24, 25, 27, 28, 30, 32, 33, 35 }
};
+/* maximum number of MBs in the DPB for a given level */
+static const int level_max_dpb_mbs[][2] = {
+ { 10, 396 },
+ { 11, 900 },
+ { 12, 2376 },
+ { 13, 2376 },
+ { 20, 2376 },
+ { 21, 4752 },
+ { 22, 8100 },
+ { 30, 8100 },
+ { 31, 18000 },
+ { 32, 20480 },
+ { 40, 32768 },
+ { 41, 32768 },
+ { 42, 34816 },
+ { 50, 110400 },
+ { 51, 184320 },
+ { 52, 184320 },
+};
+
static inline int decode_hrd_parameters(H264Context *h, SPS *sps)
{
int cpb_count, i;
goto fail;
}
+ /* if the maximum delay is not stored in the SPS, derive it based on the
+ * level */
+ if (!sps->bitstream_restriction_flag) {
+ sps->num_reorder_frames = MAX_DELAYED_PIC_COUNT - 1;
+ for (i = 0; i < FF_ARRAY_ELEMS(level_max_dpb_mbs); i++) {
+ if (level_max_dpb_mbs[i][0] == sps->level_idc) {
+ sps->num_reorder_frames = FFMIN(level_max_dpb_mbs[i][1] / (sps->mb_width * sps->mb_height),
+ sps->num_reorder_frames);
+ break;
+ }
+ }
+ }
+
if (!sps->sar.den)
sps->sar.den = 1;