openharmony/third_party_alsa-lib
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Linked streams fix. Ported latency.c

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This commit is contained in:
Abramo Bagnara 2000-07-24 09:17:14 +00:00
parent 59c6c40f5c
commit 72fa3cc203
1 changed files with 20 additions and 24 deletions
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44
test/latency.c
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@ -34,7 +34,7 @@ static char *xitoa(int aaa)
* Used format is 44100Hz, Signed Little Endian 16-bit, Stereo.
*/
int setparams(snd_pcm_t *phandle, snd_pcm_t *chandle, int sync, int *bufsize)
int setparams(snd_pcm_t *phandle, snd_pcm_t *chandle, int *bufsize)
{
int err;
snd_pcm_params_t params;
@ -89,10 +89,7 @@ int setparams(snd_pcm_t *phandle, snd_pcm_t *chandle, int sync, int *bufsize)
printf("Playback prepare error: %s\n", snd_strerror(err));
exit(0);
}
if ((err = snd_pcm_prepare(chandle)) < 0) {
printf("Capture prepare error: %s\n", snd_strerror(err));
exit(0);
}
snd_pcm_dump(phandle, stdout);
snd_pcm_dump(chandle, stdout);
printf("Trying latency %i...\n", *bufsize);
@ -191,11 +188,9 @@ int main(void)
int ccard = 0, cdevice = 0;
int err, latency = LATENCY_MIN - 4;
int size, ok;
int sync;
snd_pcm_status_t pstatus, cstatus;
ssize_t r;
size_t frames_in, frames_out;
snd_pcm_synchro_request_t sync_req[2];
setscheduler();
if ((err = snd_pcm_plug_open(&phandle, pcard, pdevice, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK)) < 0) {
@ -206,10 +201,11 @@ int main(void)
printf("Record open error: %s\n", snd_strerror(err));
return 0;
}
memset(sync_req, 0, sizeof(sync_req));
sync_req[0].handle = phandle;
sync_req[0].result = -3;
sync_req[1].handle = chandle;
if ((err = snd_pcm_link(phandle, chandle)) < 0) {
printf("Streams link error: %s\n", snd_strerror(err));
exit(0);
}
#ifdef USE_FRAGMENT_MODE
printf("Using fragment mode...\n");
#else
@ -218,7 +214,7 @@ int main(void)
printf("Loop limit is %li frames\n", LOOP_LIMIT);
while (1) {
frames_in = frames_out = 0;
if (setparams(phandle, chandle, sync, &latency) < 0)
if (setparams(phandle, chandle, &latency) < 0)
break;
if (snd_pcm_format_set_silence(SND_PCM_SFMT_S16_LE, buffer, latency*2) < 0) {
fprintf(stderr, "silence error\n");
@ -229,14 +225,10 @@ int main(void)
break;
}
if ((err = snd_pcm_synchro(SND_PCM_SYNCHRO_GO, 2, sync_req, SND_PCM_SYNC_MODE_NORMAL)) < 0) {
printf("Sync go error: %s\n", snd_strerror(err));
if ((err = snd_pcm_go(phandle)) < 0) {
printf("Go error: %s\n", snd_strerror(err));
exit(0);
}
if (sync_req[0].tstamp.tv_sec == sync_req[1].tstamp.tv_sec &&
sync_req[0].tstamp.tv_usec == sync_req[1].tstamp.tv_usec) {
printf("Hardware sync\n");
}
ok = 1;
size = 0;
while (ok && frames_in < LOOP_LIMIT) {
@ -249,15 +241,19 @@ int main(void)
showstat(phandle, &pstatus, frames_out);
printf("Capture:\n");
showstat(chandle, &cstatus, frames_in);
snd_pcm_flush(chandle);
if (pstatus.trigger_time.tv_sec == cstatus.trigger_time.tv_sec &&
pstatus.trigger_time.tv_usec == cstatus.trigger_time.tv_usec)
printf("Hardware sync\n");
snd_pcm_flush(phandle);
if (ok) {
#if 0
printf("Playback time = %li.%i, Record time = %li.%i, diff = %li\n",
pstatus.stime.tv_sec,
(int)pstatus.stime.tv_usec,
cstatus.stime.tv_sec,
(int)cstatus.stime.tv_usec,
timediff(pstatus.stime, cstatus.stime));
pstatus.trigger_time.tv_sec,
(int)pstatus.trigger_time.tv_usec,
cstatus.trigger_time.tv_sec,
(int)cstatus.trigger_time.tv_usec,
timediff(pstatus.trigger_time, cstatus.trigger_time));
#endif
break;
}
}