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alsa-time-test: Add fillrate parameter

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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@canonical.com>
This commit is contained in:
David Henningsson 2014-09-10 14:43:19 +02:00
parent eb108b3539
commit d303489ef0
1 changed files with 13 additions and 9 deletions
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22
src/tests/alsa-time-test.c
View file

@ -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 &&