fft-test: K&R formatting cosmetics

Also rearrange #includes into canonical order.

libavcodec/fft-test.c

@@ -23,14 +23,8 @@
  * FFT and MDCT tests.
  */
 
-#include "libavutil/cpu.h"
-#include "libavutil/mathematics.h"
-#include "libavutil/lfg.h"
-#include "libavutil/log.h"
-#include "libavutil/time.h"
-#include "fft.h"
-#include "dct.h"
-#include "rdft.h"
+#include "config.h"
+
 #include <math.h>
 #if HAVE_UNISTD_H
 #include <unistd.h>
@@ -39,24 +33,34 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "libavutil/cpu.h"
+#include "libavutil/lfg.h"
+#include "libavutil/log.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/time.h"
+
+#include "dct.h"
+#include "fft.h"
+#include "rdft.h"
+
 /* reference fft */
 
-#define MUL16(a,b) ((a) * (b))
+#define MUL16(a, b) ((a) * (b))
 
-#define CMAC(pre, pim, are, aim, bre, bim) \
-{\
-   pre += (MUL16(are, bre) - MUL16(aim, bim));\
-   pim += (MUL16(are, bim) + MUL16(bre, aim));\
-}
+#define CMAC(pre, pim, are, aim, bre, bim)          \
+    {                                               \
+        pre += (MUL16(are, bre) - MUL16(aim, bim)); \
+        pim += (MUL16(are, bim) + MUL16(bre, aim)); \
+    }
 
 #if FFT_FLOAT
-#   define RANGE 1.0
-#   define REF_SCALE(x, bits)  (x)
-#   define FMT "%10.6f"
+#define RANGE 1.0
+#define REF_SCALE(x, bits)  (x)
+#define FMT "%10.6f"
 #else
-#   define RANGE 16384
-#   define REF_SCALE(x, bits) ((x) / (1<<(bits)))
-#   define FMT "%6d"
+#define RANGE 16384
+#define REF_SCALE(x, bits) ((x) / (1 << (bits)))
+#define FMT "%6d"
 #endif
 
 static struct {
@@ -71,8 +75,8 @@ static int fft_ref_init(int nbits, int inverse)
     if (!exptab)
         return AVERROR(ENOMEM);
 
-    for (i = 0; i < (n/2); i++) {
-        double alpha = 2 * M_PI * (float)i / (float)n;
+    for (i = 0; i < (n / 2); i++) {
+        double alpha = 2 * M_PI * (float) i / (float) n;
         double c1 = cos(alpha), s1 = sin(alpha);
         if (!inverse)
             s1 = -s1;
@@ -116,9 +120,9 @@ static void imdct_ref(FFTSample *out, FFTSample *in, int nbits)
 
     for (i = 0; i < n; i++) {
         double sum = 0;
-        for (k = 0; k < n/2; k++) {
+        for (k = 0; k < n / 2; k++) {
             int a = (2 * i + 1 + (n / 2)) * (2 * k + 1);
-            double f = cos(M_PI * a / (double)(2 * n));
+            double f = cos(M_PI * a / (double) (2 * n));
             sum += f * in[k];
         }
         out[i] = REF_SCALE(-sum, nbits - 2);
@@ -131,7 +135,7 @@ static void mdct_ref(FFTSample *output, FFTSample *input, int nbits)
     int i, k, n = 1 << nbits;
 
     /* do it by hand */
-    for (k = 0; k < n/2; k++) {
+    for (k = 0; k < n / 2; k++) {
         double s = 0;
         for (i = 0; i < n; i++) {
             double a = (2 * M_PI * (2 * i + 1 + n / 2) * (2 * k + 1) / (4 * n));
@@ -158,6 +162,7 @@ static void idct_ref(float *output, float *input, int nbits)
         output[i] = 2 * s / n;
     }
 }
+
 static void dct_ref(float *output, float *input, int nbits)
 {
     int i, k, n = 1 << nbits;
@@ -175,10 +180,9 @@ static void dct_ref(float *output, float *input, int nbits)
 #endif /* CONFIG_DCT */
 #endif /* FFT_FLOAT */
 
-
 static FFTSample frandom(AVLFG *prng)
 {
-    return (int16_t)av_lfg_get(prng) / 32768.0 * RANGE;
+    return (int16_t) av_lfg_get(prng) / 32768.0 * RANGE;
 }
 
 static int check_diff(FFTSample *tab1, FFTSample *tab2, int n, double scale)
@@ -193,17 +197,18 @@ static int check_diff(FFTSample *tab1, FFTSample *tab2, int n, double scale)
                    i, tab1[i], tab2[i]);
             err = 1;
         }
-        error+= e*e;
-        if(e>max) max= e;
+        error += e * e;
+        if (e > max)
+            max = e;
     }
-    av_log(NULL, AV_LOG_INFO, "max:%f e:%g\n", max, sqrt(error)/n);
+    av_log(NULL, AV_LOG_INFO, "max:%f e:%g\n", max, sqrt(error) / n);
     return err;
 }
 
-
 static void help(void)
 {
-    av_log(NULL, AV_LOG_INFO,"usage: fft-test [-h] [-s] [-i] [-n b]\n"
+    av_log(NULL, AV_LOG_INFO,
+           "usage: fft-test [-h] [-s] [-i] [-n b]\n"
            "-h     print this help\n"
            "-s     speed test\n"
            "-m     (I)MDCT test\n"
@@ -211,8 +216,7 @@ static void help(void)
            "-r     (I)RDFT test\n"
            "-i     inverse transform test\n"
            "-n b   set the transform size to 2^b\n"
-           "-f x   set scale factor for output data of (I)MDCT to x\n"
-           );
+           "-f x   set scale factor for output data of (I)MDCT to x\n");
 }
 
 enum tf_transform {
@@ -244,11 +248,11 @@ int main(int argc, char **argv)
 
     av_lfg_init(&prng, 1);
 
-    for(;;) {
+    for (;;) {
         int c = getopt(argc, argv, "hsimrdn:f:c:");
         if (c == -1)
             break;
-        switch(c) {
+        switch (c) {
         case 'h':
             help();
             return 1;
@@ -285,10 +289,10 @@ int main(int argc, char **argv)
     }
 
     fft_size = 1 << fft_nbits;
-    tab = av_malloc(fft_size * sizeof(FFTComplex));
-    tab1 = av_malloc(fft_size * sizeof(FFTComplex));
-    tab_ref = av_malloc(fft_size * sizeof(FFTComplex));
-    tab2 = av_malloc(fft_size * sizeof(FFTSample));
+    tab      = av_malloc(fft_size * sizeof(FFTComplex));
+    tab1     = av_malloc(fft_size * sizeof(FFTComplex));
+    tab_ref  = av_malloc(fft_size * sizeof(FFTComplex));
+    tab2     = av_malloc(fft_size * sizeof(FFTSample));
 
     if (!(tab && tab1 && tab_ref && tab2))
         goto cleanup;
@@ -296,19 +300,19 @@ int main(int argc, char **argv)
     switch (transform) {
 #if CONFIG_MDCT
     case TRANSFORM_MDCT:
-        av_log(NULL, AV_LOG_INFO,"Scale factor is set to %f\n", scale);
+        av_log(NULL, AV_LOG_INFO, "Scale factor is set to %f\n", scale);
         if (do_inverse)
-            av_log(NULL, AV_LOG_INFO,"IMDCT");
+            av_log(NULL, AV_LOG_INFO, "IMDCT");
         else
-            av_log(NULL, AV_LOG_INFO,"MDCT");
+            av_log(NULL, AV_LOG_INFO, "MDCT");
         ff_mdct_init(&m, fft_nbits, do_inverse, scale);
         break;
 #endif /* CONFIG_MDCT */
     case TRANSFORM_FFT:
         if (do_inverse)
-            av_log(NULL, AV_LOG_INFO,"IFFT");
+            av_log(NULL, AV_LOG_INFO, "IFFT");
         else
-            av_log(NULL, AV_LOG_INFO,"FFT");
+            av_log(NULL, AV_LOG_INFO, "FFT");
         ff_fft_init(&s, fft_nbits, do_inverse);
         if (err = fft_ref_init(fft_nbits, do_inverse) < 0)
             goto cleanup;
@@ -317,9 +321,9 @@ int main(int argc, char **argv)
 #if CONFIG_RDFT
     case TRANSFORM_RDFT:
         if (do_inverse)
-            av_log(NULL, AV_LOG_INFO,"IDFT_C2R");
+            av_log(NULL, AV_LOG_INFO, "IDFT_C2R");
         else
-            av_log(NULL, AV_LOG_INFO,"DFT_R2C");
+            av_log(NULL, AV_LOG_INFO, "DFT_R2C");
         ff_rdft_init(&r, fft_nbits, do_inverse ? IDFT_C2R : DFT_R2C);
         if (err = fft_ref_init(fft_nbits, do_inverse) < 0)
             goto cleanup;
@@ -328,9 +332,9 @@ int main(int argc, char **argv)
 #if CONFIG_DCT
     case TRANSFORM_DCT:
         if (do_inverse)
-            av_log(NULL, AV_LOG_INFO,"DCT_III");
+            av_log(NULL, AV_LOG_INFO, "DCT_III");
         else
-            av_log(NULL, AV_LOG_INFO,"DCT_II");
+            av_log(NULL, AV_LOG_INFO, "DCT_II");
         ff_dct_init(&d, fft_nbits, do_inverse ? DCT_III : DCT_II);
         break;
 #endif /* CONFIG_DCT */
@@ -339,7 +343,7 @@ int main(int argc, char **argv)
         av_log(NULL, AV_LOG_ERROR, "Requested transform not supported\n");
         goto cleanup;
     }
-    av_log(NULL, AV_LOG_INFO," %d test\n", fft_size);
+    av_log(NULL, AV_LOG_INFO, " %d test\n", fft_size);
 
     /* generate random data */
 
@@ -349,21 +353,21 @@ int main(int argc, char **argv)
     }
 
     /* checking result */
-    av_log(NULL, AV_LOG_INFO,"Checking...\n");
+    av_log(NULL, AV_LOG_INFO, "Checking...\n");
 
     switch (transform) {
 #if CONFIG_MDCT
     case TRANSFORM_MDCT:
         if (do_inverse) {
-            imdct_ref((FFTSample *)tab_ref, (FFTSample *)tab1, fft_nbits);
-            m.imdct_calc(&m, tab2, (FFTSample *)tab1);
-            err = check_diff((FFTSample *)tab_ref, tab2, fft_size, scale);
+            imdct_ref((FFTSample *) tab_ref, (FFTSample *) tab1, fft_nbits);
+            m.imdct_calc(&m, tab2, (FFTSample *) tab1);
+            err = check_diff((FFTSample *) tab_ref, tab2, fft_size, scale);
         } else {
-            mdct_ref((FFTSample *)tab_ref, (FFTSample *)tab1, fft_nbits);
+            mdct_ref((FFTSample *) tab_ref, (FFTSample *) tab1, fft_nbits);
 
-            m.mdct_calc(&m, tab2, (FFTSample *)tab1);
+            m.mdct_calc(&m, tab2, (FFTSample *) tab1);
 
-            err = check_diff((FFTSample *)tab_ref, tab2, fft_size / 2, scale);
+            err = check_diff((FFTSample *) tab_ref, tab2, fft_size / 2, scale);
         }
         break;
 #endif /* CONFIG_MDCT */
@@ -373,7 +377,8 @@ int main(int argc, char **argv)
         s.fft_calc(&s, tab);
 
         fft_ref(tab_ref, tab1, fft_nbits);
-        err = check_diff((FFTSample *)tab_ref, (FFTSample *)tab, fft_size * 2, 1.0);
+        err = check_diff((FFTSample *) tab_ref, (FFTSample *) tab,
+                         fft_size * 2, 1.0);
         break;
 #if FFT_FLOAT
 #if CONFIG_RDFT
@@ -381,11 +386,11 @@ int main(int argc, char **argv)
     {
         int fft_size_2 = fft_size >> 1;
         if (do_inverse) {
-            tab1[         0].im = 0;
+            tab1[0].im          = 0;
             tab1[fft_size_2].im = 0;
             for (i = 1; i < fft_size_2; i++) {
-                tab1[fft_size_2+i].re =  tab1[fft_size_2-i].re;
-                tab1[fft_size_2+i].im = -tab1[fft_size_2-i].im;
+                tab1[fft_size_2 + i].re =  tab1[fft_size_2 - i].re;
+                tab1[fft_size_2 + i].im = -tab1[fft_size_2 - i].im;
             }
 
             memcpy(tab2, tab1, fft_size * sizeof(FFTSample));
@@ -397,7 +402,8 @@ int main(int argc, char **argv)
                 tab[i].re = tab2[i];
                 tab[i].im = 0;
             }
-            err = check_diff((float *)tab_ref, (float *)tab, fft_size * 2, 0.5);
+            err = check_diff((float *) tab_ref, (float *) tab,
+                             fft_size * 2, 0.5);
         } else {
             for (i = 0; i < fft_size; i++) {
                 tab2[i]    = tab1[i].re;
@@ -406,7 +412,7 @@ int main(int argc, char **argv)
             r.rdft_calc(&r, tab2);
             fft_ref(tab_ref, tab1, fft_nbits);
             tab_ref[0].im = tab_ref[fft_size_2].re;
-            err = check_diff((float *)tab_ref, (float *)tab2, fft_size, 1.0);
+            err = check_diff((float *) tab_ref, (float *) tab2, fft_size, 1.0);
         }
         break;
     }
@@ -415,12 +421,11 @@ int main(int argc, char **argv)
     case TRANSFORM_DCT:
         memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
         d.dct_calc(&d, tab);
-        if (do_inverse) {
+        if (do_inverse)
             idct_ref(tab_ref, tab1, fft_nbits);
-        } else {
+        else
             dct_ref(tab_ref, tab1, fft_nbits);
-        }
-        err = check_diff((float *)tab_ref, (float *)tab, fft_size, 1.0);
+        err = check_diff((float *) tab_ref, (float *) tab, fft_size, 1.0);
         break;
 #endif /* CONFIG_DCT */
 #endif /* FFT_FLOAT */
@@ -432,19 +437,18 @@ int main(int argc, char **argv)
         int64_t time_start, duration;
         int nb_its;
 
-        av_log(NULL, AV_LOG_INFO,"Speed test...\n");
+        av_log(NULL, AV_LOG_INFO, "Speed test...\n");
         /* we measure during about 1 seconds */
         nb_its = 1;
-        for(;;) {
+        for (;;) {
             time_start = av_gettime();
             for (it = 0; it < nb_its; it++) {
                 switch (transform) {
                 case TRANSFORM_MDCT:
-                    if (do_inverse) {
-                        m.imdct_calc(&m, (FFTSample *)tab, (FFTSample *)tab1);
-                    } else {
-                        m.mdct_calc(&m, (FFTSample *)tab, (FFTSample *)tab1);
-                    }
+                    if (do_inverse)
+                        m.imdct_calc(&m, (FFTSample *) tab, (FFTSample *) tab1);
+                    else
+                        m.mdct_calc(&m, (FFTSample *) tab, (FFTSample *) tab1);
                     break;
                 case TRANSFORM_FFT:
                     memcpy(tab, tab1, fft_size * sizeof(FFTComplex));
@@ -467,9 +471,10 @@ int main(int argc, char **argv)
                 break;
             nb_its *= 2;
         }
-        av_log(NULL, AV_LOG_INFO,"time: %0.1f us/transform [total time=%0.2f s its=%d]\n",
-               (double)duration / nb_its,
-               (double)duration / 1000000.0,
+        av_log(NULL, AV_LOG_INFO,
+               "time: %0.1f us/transform [total time=%0.2f s its=%d]\n",
+               (double) duration / nb_its,
+               (double) duration / 1000000.0,
                nb_its);
     }