Use AudioCompress for volume normalization

git-svn-id: https://svn.musicpd.org/mpd/trunk@4474 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/compress.h

@@ -0,0 +1,29 @@
+/* compress.h
+** interface to audio compression
+*/
+
+#ifndef COMPRESS_H
+#define COMPRESS_H
+
+/* These are copied from the AudioCompress config.h, mainly because CompressDo
+ * needs GAINSHIFT defined.  The rest are here so they can be used as defaults
+ * to pass to CompressCfg. */
+#define ANTICLIP 0		/* Strict clipping protection */
+#define TARGET 25000		/* Target level */
+#define GAINMAX 32		/* The maximum amount to amplify by */
+#define GAINSHIFT 10		/* How fine-grained the gain is */
+#define GAINSMOOTH 8		/* How much inertia ramping has*/
+#define BUCKETS 400		/* How long of a history to store */
+
+void CompressCfg(int monitor,
+		 int anticlip,
+		 int target,
+		 int maxgain,
+		 int smooth,
+		 int buckets);
+
+void CompressDo(void *data, unsigned int numSamples);
+
+void CompressFree(void);
+
+#endif