auto import from //depot/cupcake/@135843

1 files changed, 177 insertions, 0 deletions

diff --git a/audio/mixeng_template.h b/audio/mixeng_template.h
new file mode 100644
index 0000000..d726441
--- /dev/null
+++ b/audio/mixeng_template.h
@@ -0,0 +1,177 @@
+/*
+ * QEMU Mixing engine
+ *
+ * Copyright (c) 2004-2005 Vassili Karpov (malc)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/*
+ * Tusen tack till Mike Nordell
+ * dec++'ified by Dscho
+ */
+
+#ifndef SIGNED
+#define HALF (IN_MAX >> 1)
+#endif
+
+#ifdef NOVOL
+#define VOL(a, b) a
+#else
+#ifdef FLOAT_MIXENG
+#define VOL(a, b) ((a) * (b))
+#else
+#define VOL(a, b) ((a) * (b)) >> 32
+#endif
+#endif
+
+#define ET glue (ENDIAN_CONVERSION, glue (_, IN_T))
+
+#ifdef FLOAT_MIXENG
+static real_t inline glue (conv_, ET) (IN_T v)
+{
+    IN_T nv = ENDIAN_CONVERT (v);
+
+#ifdef RECIPROCAL
+#ifdef SIGNED
+    return nv * (1.f / (real_t) (IN_MAX - IN_MIN));
+#else
+    return (nv - HALF) * (1.f / (real_t) IN_MAX);
+#endif
+#else  /* !RECIPROCAL */
+#ifdef SIGNED
+    return nv / (real_t) (IN_MAX - IN_MIN);
+#else
+    return (nv - HALF) / (real_t) IN_MAX;
+#endif
+#endif
+}
+
+static IN_T inline glue (clip_, ET) (real_t v)
+{
+    if (v >= 0.5) {
+        return IN_MAX;
+    }
+    else if (v < -0.5) {
+        return IN_MIN;
+    }
+
+#ifdef SIGNED
+    return ENDIAN_CONVERT ((IN_T) (v * (IN_MAX - IN_MIN)));
+#else
+    return ENDIAN_CONVERT ((IN_T) ((v * IN_MAX) + HALF));
+#endif
+}
+
+#else  /* !FLOAT_MIXENG */
+
+static inline int64_t glue (conv_, ET) (IN_T v)
+{
+    IN_T nv = ENDIAN_CONVERT (v);
+#ifdef SIGNED
+    return ((int64_t) nv) << (32 - SHIFT);
+#else
+    return ((int64_t) nv - HALF) << (32 - SHIFT);
+#endif
+}
+
+static inline IN_T glue (clip_, ET) (int64_t v)
+{
+    if (v >= 0x7f000000) {
+        return IN_MAX;
+    }
+    else if (v < -2147483648LL) {
+        return IN_MIN;
+    }
+
+#ifdef SIGNED
+    return ENDIAN_CONVERT ((IN_T) (v >> (32 - SHIFT)));
+#else
+    return ENDIAN_CONVERT ((IN_T) ((v >> (32 - SHIFT)) + HALF));
+#endif
+}
+#endif
+
+static void glue (glue (conv_, ET), _to_stereo)
+    (st_sample_t *dst, const void *src, int samples, volume_t *vol)
+{
+    st_sample_t *out = dst;
+    IN_T *in = (IN_T *) src;
+#ifndef NOVOL
+    if (vol->mute) {
+        mixeng_clear (dst, samples);
+        return;
+    }
+#else
+    (void) vol;
+#endif
+    while (samples--) {
+        out->l = VOL (glue (conv_, ET) (*in++), vol->l);
+        out->r = VOL (glue (conv_, ET) (*in++), vol->r);
+        out += 1;
+    }
+}
+
+static void glue (glue (conv_, ET), _to_mono)
+    (st_sample_t *dst, const void *src, int samples, volume_t *vol)
+{
+    st_sample_t *out = dst;
+    IN_T *in = (IN_T *) src;
+#ifndef NOVOL
+    if (vol->mute) {
+        mixeng_clear (dst, samples);
+        return;
+    }
+#else
+    (void) vol;
+#endif
+    while (samples--) {
+        out->l = VOL (glue (conv_, ET) (in[0]), vol->l);
+        out->r = out->l;
+        out += 1;
+        in += 1;
+    }
+}
+
+static void glue (glue (clip_, ET), _from_stereo)
+    (void *dst, const st_sample_t *src, int samples)
+{
+    const st_sample_t *in = src;
+    IN_T *out = (IN_T *) dst;
+    while (samples--) {
+        *out++ = glue (clip_, ET) (in->l);
+        *out++ = glue (clip_, ET) (in->r);
+        in += 1;
+    }
+}
+
+static void glue (glue (clip_, ET), _from_mono)
+    (void *dst, const st_sample_t *src, int samples)
+{
+    const st_sample_t *in = src;
+    IN_T *out = (IN_T *) dst;
+    while (samples--) {
+        *out++ = glue (clip_, ET) (in->l + in->r);
+        in += 1;
+    }
+}
+
+#undef ET
+#undef HALF
+#undef VOL