Add FS #10214. Initial commit of the original PDa code for the GSoC Pure Data plugin project of Wincent Balin. Stripped some non-sourcefiles and added a rockbox readme that needs a bit more info from Wincent. Is added to CATEGORIES and viewers, but not yet to SUBDIRS (ie doesn't build yet)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21044 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 110 insertions, 0 deletions

diff --git a/apps/plugins/pdbox/PDa/src/m_fixed.h b/apps/plugins/pdbox/PDa/src/m_fixed.h
new file mode 100644
index 0000000000..4ccc121ac1
--- /dev/null
+++ b/apps/plugins/pdbox/PDa/src/m_fixed.h
@@ -0,0 +1,110 @@
+#ifndef __M_FIXED_H__
+#define __M_FIXED_H__
+
+typedef int t_sample;
+
+#define t_fixed int
+#define fix1 18  /* (18) number of bits after comma */
+
+
+#define fixfac ((float)(1<<fix1))  /* float factor (for scaling ftofix ..) */
+
+
+/* fixed point multiplication and division */
+
+#define mult(a,b) (long long)(((long long) (a) * (long long) (b))>>fix1)
+#define idiv(a,b) ((((long long) (a) )<<fix1)/(long long) (b) )
+
+/* conversion macros */
+
+#define itofix(a) ((a) << fix1)
+#define ftofix(a) ((t_fixed)( (a) *(double)fixfac + 0.5))
+
+#define fixtof(a) ((double) (a) * 1./(fixfac-0.5))
+#define fixtoi(a) ((a) >>fix1)
+
+
+/* Not working !! */
+
+#define fnum(a) ( (a) >>(fix1-16))
+#define ffrac(a) (0)
+
+
+/* mapping of fft functions */
+
+#ifdef FIXEDPOINT
+#define mayer_realifft imayer_realifft
+#define mayer_realfft imayer_realfft
+#define mayer_fft imayer_fft
+#define mayer_ifft imayer_ifft
+#endif
+
+#ifdef FIXEDPOINT
+#define SCALE16(x) (x>>(fix1-15))
+#define SCALE32(x) (x<<(32-fix1))
+#define INVSCALE16(x) (x<<8)
+#else
+#define SCALE16(x) (32767.*x)
+#define SCALE32(x) (2147483648.*x)
+#define INVSCALE16(x) ((float)3.051850e-05*x)
+#endif
+
+
+#endif
+
+
+#ifndef __M_FIXED_H__
+#define __M_FIXED_H__
+
+typedef int t_sample;
+
+#define t_fixed int
+#define fix1 18  /* (18) number of bits after comma */
+
+
+#define fixfac ((float)(1<<fix1))  /* float factor (for scaling ftofix ..) */
+
+
+/* fixed point multiplication and division */
+
+#define mult(a,b) (long long)(((long long) (a) * (long long) (b))>>fix1)
+#define idiv(a,b) ((((long long) (a) )<<fix1)/(long long) (b) )
+
+/* conversion macros */
+
+#define itofix(a) ((a) << fix1)
+#define ftofix(a) ((t_fixed)( (a) *(double)fixfac + 0.5))
+
+#define fixtof(a) ((double) (a) * 1./(fixfac-0.5))
+#define fixtoi(a) ((a) >>fix1)
+
+
+/* Not working !! */
+
+#define fnum(a) ( (a) >>(fix1-16))
+#define ffrac(a) (0)
+
+
+/* mapping of fft functions */
+
+#ifdef FIXEDPOINT
+#define mayer_realifft imayer_realifft
+#define mayer_realfft imayer_realfft
+#define mayer_fft imayer_fft
+#define mayer_ifft imayer_ifft
+#endif
+
+#ifdef FIXEDPOINT
+#define SCALE16(x) (x>>(fix1-15))
+#define SCALE32(x) (x<<(32-fix1))
+#define INVSCALE16(x) (x<<8)
+#else
+#define SCALE16(x) (32767.*x)
+#define SCALE32(x) (2147483648.*x)
+#define INVSCALE16(x) ((float)3.051850e-05*x)
+#endif
+
+
+#endif
+
+