Merge remote branch 'qatar/master'

[ffmpeg] / libavcodec / costablegen.c

diff --git a/libavcodec/costablegen.c b/libavcodec/costablegen.c
index 545fe7f998e4f646b4081e7f616b76f2fb298bc8..6e818252f7e3421d2176370025747398c26be594 100644 (file)
--- a/libavcodec/costablegen.c
+++ b/libavcodec/costablegen.c
@@ -29,14 +29,33 @@
 #endif
 #define BITS 16
 #define FLOATFMT "%.18e"
+#define FIXEDFMT "%6d"
+
+static int clip_f15(int v)
+{
+    return v < -32767 ? -32767 :
+           v >  32767 ?  32767 :
+           v;
+}
+
+static void printval(double val, int fixed)
+{
+    if (fixed)
+        printf(" "FIXEDFMT",", clip_f15(lrint(val * (double)(1<<15))));
+    else
+        printf(" "FLOATFMT",", val);
+
+}
 
 int main(int argc, char *argv[])
 {
     int i, j;
-    int do_sin = argc == 2 && !strcmp(argv[1], "sin");
+    int do_sin = argc > 1 && !strcmp(argv[1], "sin");
+    int fixed  = argc > 2 && !strcmp(argv[2], "fixed");
     double (*func)(double) = do_sin ? sin : cos;
 
     printf("/* This file was generated by libavcodec/costablegen */\n");
+    printf("#define CONFIG_FFT_FLOAT %d\n", !fixed);
     printf("#include \"libavcodec/%s\"\n", do_sin ? "rdft.h" : "fft.h");
     for (i = 4; i <= BITS; i++) {
         int m = 1 << i;
@@ -46,11 +65,12 @@ int main(int argc, char *argv[])
             int idx = j > m/4 ? m/2 - j : j;
             if (do_sin && j >= m/4)
                 idx = m/4 - j;
-            printf(" "FLOATFMT",", func(idx*freq));
+            printval(func(idx*freq), fixed);
             if ((j & 3) == 3)
                 printf("\n   ");
         }
-        printf(" "FLOATFMT"\n};\n", func(do_sin ? -(m/4 - 1)*freq : freq));
+        printval(func(do_sin ? -(m/4 - 1)*freq : freq), fixed);
+        printf("\n};\n");
     }
     return 0;
 }