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authorYang Zhang <yang.z.zhang@intel.com>2015-08-28 09:58:54 +0800
committerYang Zhang <yang.z.zhang@intel.com>2015-09-01 12:44:00 +0800
commite44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch)
tree66b09f592c55df2878107a468a91d21506104d3f /qemu/audio/rate_template.h
parent9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff)
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/audio/rate_template.h')
-rw-r--r--qemu/audio/rate_template.h111
1 files changed, 111 insertions, 0 deletions
diff --git a/qemu/audio/rate_template.h b/qemu/audio/rate_template.h
new file mode 100644
index 000000000..bd4b1c768
--- /dev/null
+++ b/qemu/audio/rate_template.h
@@ -0,0 +1,111 @@
+/*
+ * QEMU Mixing engine
+ *
+ * Copyright (c) 2004-2005 Vassili Karpov (malc)
+ * Copyright (c) 1998 Fabrice Bellard
+ *
+ * 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.
+ */
+
+/*
+ * Processed signed long samples from ibuf to obuf.
+ * Return number of samples processed.
+ */
+void NAME (void *opaque, struct st_sample *ibuf, struct st_sample *obuf,
+ int *isamp, int *osamp)
+{
+ struct rate *rate = opaque;
+ struct st_sample *istart, *iend;
+ struct st_sample *ostart, *oend;
+ struct st_sample ilast, icur, out;
+#ifdef FLOAT_MIXENG
+ mixeng_real t;
+#else
+ int64_t t;
+#endif
+
+ ilast = rate->ilast;
+
+ istart = ibuf;
+ iend = ibuf + *isamp;
+
+ ostart = obuf;
+ oend = obuf + *osamp;
+
+ if (rate->opos_inc == (1ULL + UINT_MAX)) {
+ int i, n = *isamp > *osamp ? *osamp : *isamp;
+ for (i = 0; i < n; i++) {
+ OP (obuf[i].l, ibuf[i].l);
+ OP (obuf[i].r, ibuf[i].r);
+ }
+ *isamp = n;
+ *osamp = n;
+ return;
+ }
+
+ while (obuf < oend) {
+
+ /* Safety catch to make sure we have input samples. */
+ if (ibuf >= iend) {
+ break;
+ }
+
+ /* read as many input samples so that ipos > opos */
+
+ while (rate->ipos <= (rate->opos >> 32)) {
+ ilast = *ibuf++;
+ rate->ipos++;
+ /* See if we finished the input buffer yet */
+ if (ibuf >= iend) {
+ goto the_end;
+ }
+ }
+
+ icur = *ibuf;
+
+ /* interpolate */
+#ifdef FLOAT_MIXENG
+#ifdef RECIPROCAL
+ t = (rate->opos & UINT_MAX) * (1.f / UINT_MAX);
+#else
+ t = (rate->opos & UINT_MAX) / (mixeng_real) UINT_MAX;
+#endif
+ out.l = (ilast.l * (1.0 - t)) + icur.l * t;
+ out.r = (ilast.r * (1.0 - t)) + icur.r * t;
+#else
+ t = rate->opos & 0xffffffff;
+ out.l = (ilast.l * ((int64_t) UINT_MAX - t) + icur.l * t) >> 32;
+ out.r = (ilast.r * ((int64_t) UINT_MAX - t) + icur.r * t) >> 32;
+#endif
+
+ /* output sample & increment position */
+ OP (obuf->l, out.l);
+ OP (obuf->r, out.r);
+ obuf += 1;
+ rate->opos += rate->opos_inc;
+ }
+
+the_end:
+ *isamp = ibuf - istart;
+ *osamp = obuf - ostart;
+ rate->ilast = ilast;
+}
+
+#undef NAME
+#undef OP