aboutsummaryrefslogtreecommitdiffstats
path: root/libFDK/src/mips/fft_rad2_mips.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'libFDK/src/mips/fft_rad2_mips.cpp')
-rw-r--r--libFDK/src/mips/fft_rad2_mips.cpp72
1 files changed, 72 insertions, 0 deletions
diff --git a/libFDK/src/mips/fft_rad2_mips.cpp b/libFDK/src/mips/fft_rad2_mips.cpp
new file mode 100644
index 0000000..2d40521
--- /dev/null
+++ b/libFDK/src/mips/fft_rad2_mips.cpp
@@ -0,0 +1,72 @@
+/*************************** Fraunhofer IIS FDK Tools **********************
+
+ (C) Copyright Fraunhofer IIS (2007)
+ All Rights Reserved
+
+ Please be advised that this software and/or program delivery is
+ Confidential Information of Fraunhofer and subject to and covered by the
+
+ Fraunhofer IIS Software Evaluation Agreement
+ between Google Inc. and Fraunhofer
+ effective and in full force since March 1, 2012.
+
+ You may use this software and/or program only under the terms and
+ conditions described in the above mentioned Fraunhofer IIS Software
+ Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+ $Id$
+ Author(s):
+ Description: dit_fft MIPS assembler replacements.
+
+ This software and/or program is protected by copyright law and international
+ treaties. Any reproduction or distribution of this software and/or program,
+ or any portion of it, may result in severe civil and criminal penalties, and
+ will be prosecuted to the maximum extent possible under law.
+
+******************************************************************************/
+
+#if defined(MIPS_DSP_LIB)
+
+#include "dsplib_util.h"
+#include "dsplib_dsp.h"
+
+#define FUNCTION_dit_fft
+
+#ifdef FUNCTION_dit_fft
+
+#include "mips_fft_twiddles.cpp"
+
+void dit_fft(FIXP_DBL *x, const INT ldn, const FIXP_STP *trigdata, const INT trigDataSize)
+{
+ int i;
+
+ int32c *din = (int32c*)x;
+ int32c *dout = (int32c*)x;
+
+ int32c scratch[1024];
+ int32c *twiddles;
+
+ switch (ldn) {
+ case 4: twiddles = (int32c*)__twiddles_mips_fft32_16; break;
+ case 5: twiddles = (int32c*)__twiddles_mips_fft32_32; break;
+ case 6: twiddles = (int32c*)__twiddles_mips_fft32_64; break;
+ case 7: twiddles = (int32c*)__twiddles_mips_fft32_128; break;
+ case 8: twiddles = (int32c*)__twiddles_mips_fft32_256; break;
+ case 9: twiddles = (int32c*)__twiddles_mips_fft32_512; break;
+ case 10: twiddles = (int32c*)__twiddles_mips_fft32_1024; break;
+ //case 11: twiddles = (int32c*)__twiddles_mips_fft32_2048; break;
+ default: FDK_ASSERT(0); break;
+ }
+
+ mips_fft32(dout, din, twiddles, scratch, ldn);
+
+ for(i=0;i<(1<<ldn);i++) {
+ x[2*i] = dout[i].re<<1;
+ x[2*i+1] = dout[i].im<<1;
+ }
+}
+#endif
+
+
+#endif /* defined(MIPS_DSP_LIB) */