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-rw-r--r--src/modules/bluetooth/sbc_math.h72
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diff --git a/src/modules/bluetooth/sbc_math.h b/src/modules/bluetooth/sbc_math.h
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+/*
+ *
+ * Bluetooth low-complexity, subband codec (SBC) library
+ *
+ * Copyright (C) 2004-2008 Marcel Holtmann <marcel@holtmann.org>
+ * Copyright (C) 2004-2005 Henryk Ploetz <henryk@ploetzli.ch>
+ * Copyright (C) 2005-2008 Brad Midgley <bmidgley@xmission.com>
+ *
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#define fabs(x) ((x) < 0 ? -(x) : (x))
+/* C does not provide an explicit arithmetic shift right but this will
+ always be correct and every compiler *should* generate optimal code */
+#define ASR(val, bits) ((-2 >> 1 == -1) ? \
+ ((int32_t)(val)) >> (bits) : ((int32_t) (val)) / (1 << (bits)))
+
+#define SCALE_PROTO4_TBL 15
+#define SCALE_ANA4_TBL 17
+#define SCALE_PROTO8_TBL 16
+#define SCALE_ANA8_TBL 17
+#define SCALE_SPROTO4_TBL 12
+#define SCALE_SPROTO8_TBL 14
+#define SCALE_NPROTO4_TBL 11
+#define SCALE_NPROTO8_TBL 11
+#define SCALE4_STAGE1_BITS 15
+#define SCALE4_STAGE2_BITS 16
+#define SCALE4_STAGED1_BITS 15
+#define SCALE4_STAGED2_BITS 16
+#define SCALE8_STAGE1_BITS 15
+#define SCALE8_STAGE2_BITS 15
+#define SCALE8_STAGED1_BITS 15
+#define SCALE8_STAGED2_BITS 16
+
+typedef int32_t sbc_fixed_t;
+
+#define SCALE4_STAGE1(src) ASR(src, SCALE4_STAGE1_BITS)
+#define SCALE4_STAGE2(src) ASR(src, SCALE4_STAGE2_BITS)
+#define SCALE4_STAGED1(src) ASR(src, SCALE4_STAGED1_BITS)
+#define SCALE4_STAGED2(src) ASR(src, SCALE4_STAGED2_BITS)
+#define SCALE8_STAGE1(src) ASR(src, SCALE8_STAGE1_BITS)
+#define SCALE8_STAGE2(src) ASR(src, SCALE8_STAGE2_BITS)
+#define SCALE8_STAGED1(src) ASR(src, SCALE8_STAGED1_BITS)
+#define SCALE8_STAGED2(src) ASR(src, SCALE8_STAGED2_BITS)
+
+#define SBC_FIXED_0(val) { val = 0; }
+#define MUL(a, b) ((a) * (b))
+#ifdef __arm__
+#define MULA(a, b, res) ({ \
+ int tmp = res; \
+ __asm__( \
+ "mla %0, %2, %3, %0" \
+ : "=&r" (tmp) \
+ : "0" (tmp), "r" (a), "r" (b)); \
+ tmp; })
+#else
+#define MULA(a, b, res) ((a) * (b) + (res))
+#endif