# HG changeset patch
# User Mychaela Falconia <falcon@freecalypso.org>
# Date 1741133155 0
# Node ID cec24988550a76ce6163fc78d83608dd316d388f
# Parent  9cd468f6872c5ad5cbdc88a68c24f9393c1a4e5d
trau-parse: AMR 5k15 CRC

diff -r 9cd468f6872c -r cec24988550a trau-decode/parse-amr.c
--- a/trau-decode/parse-amr.c	Tue Mar 04 23:41:52 2025 +0000
+++ b/trau-decode/parse-amr.c	Wed Mar 05 00:05:55 2025 +0000
@@ -61,6 +61,30 @@
 decode_mode_1(c_bits, d_bits)
 	ubit_t *c_bits, *d_bits;
 {
+	ubit_t crc_collect[57];
+	int crc1, crc2, crc3, crc4;
+
+	bcopy(c_bits, crc_collect, 25);
+	bcopy(d_bits + 46, crc_collect + 25, 16);
+	bcopy(d_bits + 64, crc_collect + 41, 11);
+	bcopy(d_bits + 87, crc_collect + 52, 5);
+	crc1 = osmo_crc8gen_check_bits(&gsm0860_amr_crc3, crc_collect, 57,
+					d_bits + 92);
+	bcopy(d_bits + 95, crc_collect, 2);
+	bcopy(d_bits + 109, crc_collect + 2, 5);
+	crc2 = osmo_crc8gen_check_bits(&gsm0860_amr_crc3, crc_collect, 7,
+					d_bits + 114);
+	bcopy(d_bits + 117, crc_collect, 2);
+	bcopy(d_bits + 131, crc_collect + 2, 5);
+	crc3 = osmo_crc8gen_check_bits(&gsm0860_amr_crc3, crc_collect, 7,
+					d_bits + 136);
+	bcopy(d_bits + 139, crc_collect, 2);
+	bcopy(d_bits + 153, crc_collect + 2, 5);
+	crc4 = osmo_crc8gen_check_bits(&gsm0860_amr_crc3, crc_collect, 7,
+					d_bits + 158);
+	printf("    CRC %s %s %s %s\n",
+		crc1 ? "bad" : "good", crc2 ? "bad" : "good",
+		crc3 ? "bad" : "good", crc4 ? "bad" : "good");
 }
 
 static void