test/pcm: Fix error messages in async callback and add snd_pcm_start() condition

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/test/pcm.c b/test/pcm.c
index ecd0afabc17ea46a988fe57c540213b32b420925..ee274223d119c719447ff5c841527c9f3db4df79 100644 (file)
--- a/test/pcm.c
+++ b/test/pcm.c
@@ -385,11 +385,11 @@ static void async_callback(snd_async_handler_t *ahandler)
                generate_sine(areas, 0, period_size, &data->phase);
                err = snd_pcm_writei(handle, samples, period_size);
                if (err < 0) {
-                       printf("Initial write error: %s\n", snd_strerror(err));
+                       printf("Write error: %s\n", snd_strerror(err));
                        exit(EXIT_FAILURE);
                }
                if (err != period_size) {
-                       printf("Initial write error: written %i expected %li\n", err, period_size);
+                       printf("Write error: written %i expected %li\n", err, period_size);
                        exit(EXIT_FAILURE);
                }
                avail = snd_pcm_avail_update(handle);
@@ -424,10 +424,12 @@ static int async_loop(snd_pcm_t *handle,
                        exit(EXIT_FAILURE);
                }
        }
-       err = snd_pcm_start(handle);
-       if (err < 0) {
-               printf("Start error: %s\n", snd_strerror(err));
-               exit(EXIT_FAILURE);
+       if (snd_pcm_state(handle) == SND_PCM_STATE_PREPARED) {
+               err = snd_pcm_start(handle);
+               if (err < 0) {
+                       printf("Start error: %s\n", snd_strerror(err));
+                       exit(EXIT_FAILURE);
+               }
        }
 
        /* because all other work is done in the signal handler,