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-rw-r--r--lib/rbcodec/codecs/libspc/spc_dsp_generic.h45
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libspc/spc_dsp_generic.h b/lib/rbcodec/codecs/libspc/spc_dsp_generic.h
new file mode 100644
index 0000000000..beeb87deb2
--- /dev/null
+++ b/lib/rbcodec/codecs/libspc/spc_dsp_generic.h
@@ -0,0 +1,45 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2006-2007 Adam Gashlin (hcs)
+ * Copyright (C) 2004-2007 Shay Green (blargg)
+ * Copyright (C) 2002 Brad Martin
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#if !SPC_NOECHO
+
+#ifndef SPC_DSP_ECHO_APPLY
+enum
+{
+ FIR_BUF_CNT = FIR_BUF_HALF * 2 * 2,
+ FIR_BUF_SIZE = FIR_BUF_CNT * sizeof ( int32_t ),
+ FIR_BUF_ALIGN = FIR_BUF_SIZE,
+ FIR_BUF_MASK = ~((FIR_BUF_ALIGN / 2) | (sizeof ( int32_t ) * 2 - 1))
+};
+
+/* Echo filter structure embedded in struct Spc_Dsp */
+struct echo_filter
+{
+ /* fir_buf [i + 8] == fir_buf [i], to avoid wrap checking in FIR code */
+ int pos; /* (0 to 7) */
+ int buf [FIR_BUF_HALF * 2] [2];
+ /* copy of echo FIR constants as int, for faster access */
+ int coeff [VOICE_COUNT];
+};
+#endif /* SPC_DSP_ECHO_APPLY */
+
+#endif /* !SPC_NOECHO */