audio: simplify flow in audio_init

[mirror_qemu.git] / audio / mixeng_template.h

diff --git a/audio/mixeng_template.h b/audio/mixeng_template.h
index a2d0ef84fd86d892d89b5338e822f7de36a2e0e2..bc8509e423f6341c5d75b47420c950d6b3a40447 100644 (file)
--- a/audio/mixeng_template.h
+++ b/audio/mixeng_template.h
@@ -31,41 +31,41 @@
 #define HALF (IN_MAX >> 1)
 #endif
 
-#define ET glue (ENDIAN_CONVERSION, glue (_, IN_T))
+#define ET glue (ENDIAN_CONVERSION, glue (glue (glue (_, ITYPE), BSIZE), _t))
+#define IN_T glue (glue (ITYPE, BSIZE), _t)
 
 #ifdef FLOAT_MIXENG
-static mixeng_real inline glue (conv_, ET) (IN_T v)
+static inline mixeng_real glue (conv_, ET) (IN_T v)
 {
     IN_T nv = ENDIAN_CONVERT (v);
 
 #ifdef RECIPROCAL
 #ifdef SIGNED
-    return nv * (1.f / (mixeng_real) (IN_MAX - IN_MIN));
+    return nv * (2.f / ((mixeng_real)IN_MAX - IN_MIN));
 #else
-    return (nv - HALF) * (1.f / (mixeng_real) IN_MAX);
+    return (nv - HALF) * (2.f / (mixeng_real)IN_MAX);
 #endif
 #else  /* !RECIPROCAL */
 #ifdef SIGNED
-    return nv / (mixeng_real) (IN_MAX - IN_MIN);
+    return nv / (((mixeng_real)IN_MAX - IN_MIN) / 2.f);
 #else
-    return (nv - HALF) / (mixeng_real) IN_MAX;
+    return (nv - HALF) / ((mixeng_real)IN_MAX / 2.f);
 #endif
 #endif
 }
 
-static IN_T inline glue (clip_, ET) (mixeng_real v)
+static inline IN_T glue (clip_, ET) (mixeng_real v)
 {
-    if (v >= 0.5) {
+    if (v >= 1.f) {
         return IN_MAX;
-    }
-    else if (v < -0.5) {
+    } else if (v < -1.f) {
         return IN_MIN;
     }
 
 #ifdef SIGNED
-    return ENDIAN_CONVERT ((IN_T) (v * (IN_MAX - IN_MIN)));
+    return ENDIAN_CONVERT((IN_T)(v * (((mixeng_real)IN_MAX - IN_MIN) / 2.f)));
 #else
-    return ENDIAN_CONVERT ((IN_T) ((v * IN_MAX) + HALF));
+    return ENDIAN_CONVERT((IN_T)((v * ((mixeng_real)IN_MAX / 2.f)) + HALF));
 #endif
 }
 
@@ -83,10 +83,9 @@ static inline int64_t glue (conv_, ET) (IN_T v)
 
 static inline IN_T glue (clip_, ET) (int64_t v)
 {
-    if (v >= 0x7f000000) {
+    if (v >= 0x7fffffffLL) {
         return IN_MAX;
-    }
-    else if (v < -2147483648LL) {
+    } else if (v < -2147483648LL) {
         return IN_MIN;
     }
 
@@ -150,3 +149,4 @@ static void glue (glue (clip_, ET), _from_mono)
 
 #undef ET
 #undef HALF
+#undef IN_T