1 files changed, 50 insertions, 0 deletions
diff --git a/src/engine/external/wavpack/float.c b/src/engine/external/wavpack/float.c
new file mode 100644
index 00000000..4b9b44ee
--- /dev/null
+++ b/src/engine/external/wavpack/float.c
@@ -0,0 +1,50 @@
+////////////////////////////////////////////////////////////////////////////
+//                           **** WAVPACK ****                            //
+//                  Hybrid Lossless Wavefile Compressor                   //
+//              Copyright (c) 1998 - 2006 Conifer Software.               //
+//                          All Rights Reserved.                          //
+//      Distributed under the BSD Software License (see license.txt)      //
+////////////////////////////////////////////////////////////////////////////
+
+// float.c
+
+#include "wavpack.h"
+
+int read_float_info (WavpackStream *wps, WavpackMetadata *wpmd)
+{
+    int bytecnt = wpmd->byte_length;
+    char *byteptr = wpmd->data;
+
+    if (bytecnt != 4)
+        return FALSE;
+
+    wps->float_flags = *byteptr++;
+    wps->float_shift = *byteptr++;
+    wps->float_max_exp = *byteptr++;
+    wps->float_norm_exp = *byteptr;
+    return TRUE;
+}
+
+void float_values (WavpackStream *wps, int32_t *values, int32_t num_values)
+{
+    int shift = wps->float_max_exp - wps->float_norm_exp + wps->float_shift;
+
+    if (shift > 32)
+        shift = 32;
+    else if (shift < -32)
+        shift = -32;
+
+    while (num_values--) {
+        if (shift > 0)
+            *values <<= shift;
+        else if (shift < 0)
+            *values >>= -shift;
+
+        if (*values > 8388607L)
+            *values = 8388607L;
+        else if (*values < -8388608L)
+            *values = -8388608L;
+
+        values++;
+    }
+}