File opus-fix-celt-decoder-assertion.patch of Package opus.15773

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File opus-fix-celt-decoder-assertion.patch of Package opus.15773

From 7ad4ba3e12a6970f81a3703fdc6b33ab3c142ec9 Mon Sep 17 00:00:00 2001
From: Niclas Olmenius <niclas@voysys.se>
Date: Wed, 19 Feb 2020 13:58:35 +0100
Subject: [PATCH] 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.
---
 celt/celt_decoder.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/celt/celt_decoder.c b/celt/celt_decoder.c
index e6efce93..74ca3b74 100644
--- a/celt/celt_decoder.c
+++ b/celt/celt_decoder.c
@@ -117,13 +117,19 @@ void validate_celt_decoder(CELTDecoder *st)
 #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);

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File opus-fix-celt-decoder-assertion.patch of Package opus.15773

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