Initial import

2020-06-15 07:18:57 -07:00
commit c91b3c5006
14915 changed files with 590219 additions and 0 deletions
--- a/dsp/core/c331.h
+++ b/dsp/core/c331.h
@@ -0,0 +1,30 @@
+#ifndef COSMOPOLITAN_DSP_CORE_C331_H_
+#define COSMOPOLITAN_DSP_CORE_C331_H_
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+COSMOPOLITAN_C_START_
+
+/**
+ * Fixed-point 8-bit magic edge resampling kernel.
+ *
+ * @define (3*a + 3*b + 1*c) / 7
+ * @see C1331()
+ */
+static inline pureconst artificial unsigned char C331(unsigned char al,
+                                                      unsigned char bl,
+                                                      unsigned char cl) {
+  unsigned eax, ebx, ecx;
+  eax = al;
+  ebx = bl;
+  ecx = cl;
+  eax += ebx;
+  eax *= 3 * 2350;
+  ecx *= 1 * 2350;
+  eax += ecx;
+  eax >>= 14;
+  al = eax;
+  return al;
+}
+
+COSMOPOLITAN_C_END_
+#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+#endif /* COSMOPOLITAN_DSP_CORE_C331_H_ */