Add a little ReadMe.

Meta/.gitignore

@@ -0,0 +1 @@
+convert-raw-to-rgb

Meta/convert-raw-to-rgb.cpp

@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int main(int argc, char**argv)
+{
+    int fd = open(argv[1], O_RDONLY);
+    if (fd < 0) {
+        perror("open");
+        return 1;
+    }
+    for (;;) {
+        unsigned buffer;
+        ssize_t nread = read(fd, &buffer, sizeof(buffer));
+        if (nread == 0)
+            break;
+        if (nread < 0) {
+            perror("read");
+            return 1;
+        }
+        unsigned converted = buffer & 0xff00ff00;
+        converted |= (buffer & 0xff0000) >> 16;
+        converted |= (buffer & 0xff) << 16;
+        write(1, &converted, sizeof(unsigned));
+    }
+    int rc = close(fd);
+    if (rc < 0) {
+        perror("close");
+        return 1;
+    }
+    return 0;
+}