fixed -b option to accept the buffer time in us.

diff --git a/test/pcm.c b/test/pcm.c
index 7b61287..e9060d1 100644 (file)
--- a/test/pcm.c
+++ b/test/pcm.c
@@ -563,7 +563,7 @@ Usage: latency [OPTION]... [FILE]...
 -r,--rate      stream rate in Hz
 -c,--channels  count of channels in stream
 -f,--frequency  sine wave frequency in Hz
--b,--buffer     ring buffer size in samples
+-b,--buffer     ring buffer size in us
 -p,--period     period size in us
 -m,--method     transfer method
 
@@ -635,9 +635,9 @@ int main(int argc, char *argv[])
                        freq = freq > 5000 ? 5000 : freq;
                        break;
                case 'b':
-                       buffer_size = atoi(optarg);
-                       buffer_size = buffer_size < 64 ? 64 : buffer_size;
-                       buffer_size = buffer_size > 64*1024 ? 64*1024 : buffer_size;
+                       buffer_time = atoi(optarg);
+                       buffer_time = buffer_time < 1000 ? 1000 : buffer_time;
+                       buffer_time = buffer_time > 1000000 ? 1000000 : buffer_time;
                        break;
                case 'p':
                        period_time = atoi(optarg);