test/pcm.c: Sample generation on big endian platforms was broken.

Has not worked since commit 3d1fa924906996463ac33cba5b5143f762d913cf

Signed-off-by: Kenneth Johansson <kenneth@southpole.se>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/test/pcm.c b/test/pcm.c
index ee274223d119c719447ff5c841527c9f3db4df79..80e1f988a7bb99f939186ec4b89014b14d174ca6 100644 (file)
--- a/test/pcm.c
+++ b/test/pcm.c
@@ -34,14 +34,10 @@ static void generate_sine(const snd_pcm_channel_area_t *areas,
        static double max_phase = 2. * M_PI;
        double phase = *_phase;
        double step = max_phase*freq/(double)rate;
-       double res;
-       unsigned char *samples[channels], *tmp;
+       unsigned char *samples[channels];
        int steps[channels];
-       unsigned int chn, byte;
-       union {
-               int i;
-               unsigned char c[4];
-       } ires;
+       unsigned int chn;
+
        unsigned int maxval = (1 << (snd_pcm_format_width(format) - 1)) - 1;
        int bps = snd_pcm_format_width(format) / 8;  /* bytes per sample */
        
@@ -61,12 +57,18 @@ static void generate_sine(const snd_pcm_channel_area_t *areas,
        }
        /* fill the channel areas */
        while (count-- > 0) {
+               int res, i;
                res = sin(phase) * maxval;
-               ires.i = res;
-               tmp = ires.c;
                for (chn = 0; chn < channels; chn++) {
-                       for (byte = 0; byte < (unsigned int)bps; byte++)
-                               *(samples[chn] + byte) = tmp[byte];
+                       /* Generate data in native endian format */
+                       for (i = 0; i < bps; i++) {
+#if (__BYTE_ORDER == __BIG_ENDIAN)
+                               *(samples[chn] + bps - 1 - i) = (res >> i * 8) & 0xff;
+#else
+
+                               *(samples[chn] + i) = (res >>  i * 8) & 0xff;
+#endif
+                       }
                        samples[chn] += steps[chn];
                }
                phase += step;