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warn if ALSA wakes us up and there is actually nothing to do

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This commit is contained in:
Lennart Poettering 2008-10-22 23:55:52 +02:00
parent 6ff9c1fb62
commit 3294c89adb
3 changed files with 66 additions and 22 deletions
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41
src/modules/module-alsa-source.c
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@ -238,7 +238,7 @@ static size_t check_left_to_record(struct userdata *u, snd_pcm_sframes_t n) {
return left_to_record;
}
static int mmap_read(struct userdata *u, pa_usec_t *sleep_usec) {
static int mmap_read(struct userdata *u, pa_usec_t *sleep_usec, pa_bool_t polled) {
int work_done = 0;
pa_usec_t max_sleep_usec = 0, process_usec = 0;
size_t left_to_record;
@ -266,11 +266,20 @@ static int mmap_read(struct userdata *u, pa_usec_t *sleep_usec) {
left_to_record = check_left_to_record(u, n);
if (u->use_tsched)
if (pa_bytes_to_usec(left_to_record, &u->source->sample_spec) > process_usec+max_sleep_usec/2)
if (!polled &&
pa_bytes_to_usec(left_to_record, &u->source->sample_spec) > process_usec+max_sleep_usec/2)
break;
if (PA_UNLIKELY(n <= 0))
if (PA_UNLIKELY(n <= 0)) {
if (polled)
pa_log("ALSA woke us up to read new data from the device, but there was actually nothing to read! "
"Most likely this is an ALSA driver bug. Please report this issue to the PulseAudio device.");
break;
}
polled = FALSE;
for (;;) {
int err;
@ -336,7 +345,7 @@ static int mmap_read(struct userdata *u, pa_usec_t *sleep_usec) {
return work_done;
}
static int unix_read(struct userdata *u, pa_usec_t *sleep_usec) {
static int unix_read(struct userdata *u, pa_usec_t *sleep_usec, pa_bool_t polled) {
int work_done = 0;
pa_usec_t max_sleep_usec = 0, process_usec = 0;
size_t left_to_record;
@ -364,11 +373,20 @@ static int unix_read(struct userdata *u, pa_usec_t *sleep_usec) {
left_to_record = check_left_to_record(u, n);
if (u->use_tsched)
if (pa_bytes_to_usec(left_to_record, &u->source->sample_spec) > process_usec+max_sleep_usec/2)
if (!polled &&
pa_bytes_to_usec(left_to_record, &u->source->sample_spec) > process_usec+max_sleep_usec/2)
break;
if (PA_UNLIKELY(n <= 0))
if (PA_UNLIKELY(n <= 0)) {
if (polled)
pa_log("ALSA woke us up to read new data from the device, but there was actually nothing to read! "
"Most likely this is an ALSA driver bug. Please report this issue to the PulseAudio developers.");
return work_done;
}
polled = FALSE;
for (;;) {
void *p;
@ -950,6 +968,7 @@ static void source_update_requested_latency_cb(pa_source *s) {
static void thread_func(void *userdata) {
struct userdata *u = userdata;
unsigned short revents = 0;
pa_assert(u);
@ -972,9 +991,9 @@ static void thread_func(void *userdata) {
pa_usec_t sleep_usec = 0;
if (u->use_mmap)
work_done = mmap_read(u, &sleep_usec);
work_done = mmap_read(u, &sleep_usec, revents & POLLIN);
else
work_done = unix_read(u, &sleep_usec);
work_done = unix_read(u, &sleep_usec, revents & POLLIN);
if (work_done < 0)
goto fail;
@ -1016,7 +1035,6 @@ static void thread_func(void *userdata) {
/* Tell ALSA about this and process its response */
if (PA_SOURCE_IS_OPENED(u->source->thread_info.state)) {
struct pollfd *pollfd;
unsigned short revents = 0;
int err;
unsigned n;
@ -1027,7 +1045,7 @@ static void thread_func(void *userdata) {
goto fail;
}
if (revents & (POLLERR|POLLNVAL|POLLHUP|POLLPRI)) {
if (revents & (POLLOUT|POLLERR|POLLNVAL|POLLHUP|POLLPRI)) {
if (pa_alsa_recover_from_poll(u->pcm_handle, revents) < 0)
goto fail;
@ -1036,7 +1054,8 @@ static void thread_func(void *userdata) {
if (revents && u->use_tsched)
pa_log_debug("Wakeup from ALSA!%s%s", (revents & POLLIN) ? " INPUT" : "", (revents & POLLOUT) ? " OUTPUT" : "");
}
} else
revents = 0;
}
fail: