move mp3 stuff to /sys/src/cmd/audio, add ogg vorbis, add play

1 files changed, 43 insertions, 0 deletions

diff --git a/sys/src/cmd/audio/libvorbis/lpc.h b/sys/src/cmd/audio/libvorbis/lpc.h
new file mode 100644
index 000000000..366226a17
--- /dev/null
+++ b/sys/src/cmd/audio/libvorbis/lpc.h
@@ -0,0 +1,43 @@
+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
+ *                                                                  *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2002             *
+ * by the XIPHOPHORUS Company http://www.xiph.org/                  *
+ *                                                                  *
+ ********************************************************************
+
+  function: LPC low level routines
+  last mod: $Id: lpc.h,v 1.19 2002/07/11 06:40:49 xiphmont Exp $
+
+ ********************************************************************/
+
+#ifndef _V_LPC_H_
+#define _V_LPC_H_
+
+#include "vorbis/codec.h"
+#include "smallft.h"
+
+typedef struct lpclook{
+  /* en/decode lookups */
+  drft_lookup fft;
+
+  int ln;
+  int m;
+
+} lpc_lookup;
+
+extern void lpc_init(lpc_lookup *l,long mapped, int m);
+extern void lpc_clear(lpc_lookup *l);
+
+/* simple linear scale LPC code */
+extern float vorbis_lpc_from_data(float *data,float *lpc,int n,int m);
+extern float vorbis_lpc_from_curve(float *curve,float *lpc,lpc_lookup *l);
+
+extern void vorbis_lpc_predict(float *coeff,float *prime,int m,
+			       float *data,long n);
+
+#endif