static const char* const valid_modargs[] = {
"source",
"sink",
+ "adjust_time",
"latency_msec",
"format",
"rate",
buffer_latency = pa_bytes_to_usec(buffer, &u->sink_input->sample_spec);
- pa_log_info("Loopback overall latency is %0.2f ms + %0.2f ms + %0.2f ms = %0.2f ms",
+ pa_log_debug("Loopback overall latency is %0.2f ms + %0.2f ms + %0.2f ms = %0.2f ms",
(double) u->latency_snapshot.sink_latency / PA_USEC_PER_MSEC,
(double) buffer_latency / PA_USEC_PER_MSEC,
(double) u->latency_snapshot.source_latency / PA_USEC_PER_MSEC,
((double) u->latency_snapshot.sink_latency + buffer_latency + u->latency_snapshot.source_latency) / PA_USEC_PER_MSEC);
- pa_log_info("Should buffer %zu bytes, buffered at minimum %zu bytes",
+ pa_log_debug("Should buffer %zu bytes, buffered at minimum %zu bytes",
u->latency_snapshot.max_request*2,
u->latency_snapshot.min_memblockq_length);
else
new_rate = base_rate + (((u->latency_snapshot.min_memblockq_length - u->latency_snapshot.max_request*2) / fs) *PA_USEC_PER_SEC)/u->adjust_time;
- pa_log_info("Old rate %lu Hz, new rate %lu Hz", (unsigned long) old_rate, (unsigned long) new_rate);
+ if (new_rate < (uint32_t) (base_rate*0.8) || new_rate > (uint32_t) (base_rate*1.25)) {
+ pa_log_warn("Sample rates too different, not adjusting (%u vs. %u).", base_rate, new_rate);
+ new_rate = base_rate;
+ } else {
+ if (base_rate < new_rate + 20 && new_rate < base_rate + 20)
+ new_rate = base_rate;
+ /* Do the adjustment in small steps; 2‰ can be considered inaudible */
+ if (new_rate < (uint32_t) (old_rate*0.998) || new_rate > (uint32_t) (old_rate*1.002)) {
+ pa_log_info("New rate of %u Hz not within 2‰ of %u Hz, forcing smaller adjustment", new_rate, old_rate);
+ new_rate = PA_CLAMP(new_rate, (uint32_t) (old_rate*0.998), (uint32_t) (old_rate*1.002));
+ }
+ }
pa_sink_input_set_rate(u->sink_input, new_rate);
+ pa_log_debug("[%s] Updated sampling rate to %lu Hz.", u->sink_input->sink->name, (unsigned long) new_rate);
pa_core_rttime_restart(u->core, u->time_event, pa_rtclock_now() + u->adjust_time);
}
switch (code) {
case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
- pa_usec_t *r = data;
+ pa_usec_t *r = data;
- pa_sink_input_assert_io_context(u->sink_input);
+ pa_sink_input_assert_io_context(u->sink_input);
*r = pa_bytes_to_usec(pa_memblockq_get_length(u->memblockq), &u->sink_input->sample_spec);