As a third parameter, add the number of samples to read/write in
every iteration. This will help slow CPUs.
Signed-off-by: David Henningsson <david.henningsson at canonical.com>
---
src/tests/alsa-time-test.c | 22 +++++++++++++---------
1 file changed, 13 insertions(+), 9 deletions(-)
diff --git a/src/tests/alsa-time-test.c b/src/tests/alsa-time-test.c
index 3c82fdc..5d75756 100644
--- a/src/tests/alsa-time-test.c
+++ b/src/tests/alsa-time-test.c
@@ -27,12 +27,14 @@ int main(int argc, char *argv[]) {
unsigned periods = 2;
snd_pcm_uframes_t boundary, buffer_size = 44100/10; /* 100s */
int dir = 1;
+ int fillrate;
struct timespec start, last_timestamp = { 0, 0 };
uint64_t start_us, last_us = 0;
snd_pcm_sframes_t last_avail = 0, last_delay = 0;
struct pollfd *pollfds;
int n_pollfd;
int64_t sample_count = 0;
+ uint16_t *samples;
struct sched_param sp;
r = -1;
@@ -54,6 +56,10 @@ int main(int argc, char *argv[]) {
dev = argc > 1 ? argv[1] : "front:AudioPCI";
cap = argc > 2 ? atoi(argv[2]) : 0;
+ fillrate = argc > 3 ? atoi(argv[3]) : 1;
+
+ samples = calloc(fillrate, 2*sizeof(uint16_t));
+ assert(samples);
if (cap == 0)
r = snd_pcm_open(&pcm, dev, SND_PCM_STREAM_PLAYBACK, 0);
@@ -108,7 +114,7 @@ int main(int argc, char *argv[]) {
r = snd_pcm_hw_params_get_buffer_size(hwparams, &buffer_size);
assert(r == 0);
- r = snd_pcm_sw_params_set_start_threshold(pcm, swparams, buffer_size);
+ r = snd_pcm_sw_params_set_start_threshold(pcm, swparams, buffer_size - (buffer_size % fillrate));
assert(r == 0);
r = snd_pcm_sw_params_get_boundary(swparams, &boundary);
@@ -185,19 +191,17 @@ int main(int argc, char *argv[]) {
assert(!revents || avail > 0);
- if ((!cap && avail) || (cap && (unsigned)avail >= buffer_size)) {
+ if ((!cap && (avail >= fillrate)) || (cap && (unsigned)avail >= buffer_size)) {
snd_pcm_sframes_t sframes;
- static const uint16_t psamples[2] = { 0, 0 };
- uint16_t csamples[2];
if (cap == 0)
- sframes = snd_pcm_writei(pcm, psamples, 1);
+ sframes = snd_pcm_writei(pcm, samples, fillrate);
else
- sframes = snd_pcm_readi(pcm, csamples, 1);
- assert(sframes == 1);
+ sframes = snd_pcm_readi(pcm, samples, fillrate);
+ assert(sframes == fillrate);
- handled = 1;
- sample_count++;
+ handled = fillrate;
+ sample_count += fillrate;
}
if (!handled &&
--
1.9.1
