Fix celt decoder assertion when using OPUS_CUSTOM
When using OPUS_CUSTOM, `CELTDecoder->end` can be larger than 21.
Assert against 25 instead in OPUS_CUSTOM builds.
Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>
diff --git a/celt/celt_decoder.c b/celt/celt_decoder.c
index e6efce9..74ca3b7 100644
--- a/celt/celt_decoder.c
+++ b/celt/celt_decoder.c
@@ -117,13 +117,19 @@
#ifndef CUSTOM_MODES
celt_assert(st->mode == opus_custom_mode_create(48000, 960, NULL));
celt_assert(st->overlap == 120);
+ celt_assert(st->end <= 21);
+#else
+/* From Section 4.3 in the spec: "The normal CELT layer uses 21 of those bands,
+ though Opus Custom (see Section 6.2) may use a different number of bands"
+
+ Check if it's within the maximum number of Bark frequency bands instead */
+ celt_assert(st->end <= 25);
#endif
celt_assert(st->channels == 1 || st->channels == 2);
celt_assert(st->stream_channels == 1 || st->stream_channels == 2);
celt_assert(st->downsample > 0);
celt_assert(st->start == 0 || st->start == 17);
celt_assert(st->start < st->end);
- celt_assert(st->end <= 21);
#ifdef OPUS_ARCHMASK
celt_assert(st->arch >= 0);
celt_assert(st->arch <= OPUS_ARCHMASK);