1 files changed, 65 insertions, 0 deletions
diff --git a/spa/plugins/audioconvert/resample-native-c.c b/spa/plugins/audioconvert/resample-native-c.c
new file mode 100644
index 0000000..ce6c57d
--- /dev/null
+++ b/spa/plugins/audioconvert/resample-native-c.c
@@ -0,0 +1,65 @@
+/* Spa
+ *
+ * Copyright © 2019 Wim Taymans
+ *
+ * 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 (including the next
+ * paragraph) 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.
+ */
+
+#include "resample-native-impl.h"
+
+static inline void inner_product_c(float *d, const float * SPA_RESTRICT s,
+		const float * SPA_RESTRICT taps, uint32_t n_taps)
+{
+	float sum = 0.0f;
+#if 1
+	uint32_t i, j, nt2 = n_taps/2;
+	for (i = 0, j = n_taps-1; i < nt2; i++, j--)
+		sum += s[i] * taps[i] + s[j] * taps[j];
+#else
+	uint32_t i;
+	for (i = 0; i < n_taps; i++)
+		sum += s[i] * taps[i];
+#endif
+	*d = sum;
+}
+
+static inline void inner_product_ip_c(float *d, const float * SPA_RESTRICT s,
+	const float * SPA_RESTRICT t0, const float * SPA_RESTRICT t1, float x,
+	uint32_t n_taps)
+{
+	float sum[2] = { 0.0f, 0.0f };
+	uint32_t i;
+#if 1
+	uint32_t j, nt2 = n_taps/2;
+	for (i = 0, j = n_taps-1; i < nt2; i++, j--) {
+		sum[0] += s[i] * t0[i] + s[j] * t0[j];
+		sum[1] += s[i] * t1[i] + s[j] * t1[j];
+	}
+#else
+	for (i = 0; i < n_taps; i++) {
+		sum[0] += s[i] * t0[i];
+		sum[1] += s[i] * t1[i];
+	}
+#endif
+	*d = (sum[1] - sum[0]) * x + sum[0];
+}
+
+MAKE_RESAMPLER_FULL(c);
+MAKE_RESAMPLER_INTER(c);