For batch devices we want to keep the IRQ so that the pointers are
updated with the period-size. Brings my UMC404HD to 4.8ms roundtrip
times with IRQ at 6 sample and batch enabled.
When the quantum is changed, the error between the current and
expected buffer levels needs to be corrected with the quantum
difference.
For example, say we are running with a 1024 quantum and the quantum
is changed to 8192, when we wake up the filled level might be
1016 vs expected 8192, 1024 - 8192 = -7168. The real error for the
timeout was 1016 - 8192 - (-7168) = -8.
When we start or after an xrun, we need fill the buffer with one
period + headroom of samples, not period*2. This is because after
start we set our timeout immediately and expect there to be
period + headroom samples in the buffer.
With period*2 we take one period longer to start and we also feed
one period of error in the dll, which causes it to wobble for no
good reason.
Use the caps of the port to set the right flags on the new port.
We only want to put the terminal/physical flags on ports that look
like hardware ports. Port created by clients should not have this
flag.
Take the queued input samples into account when calculating the
required input size. This can be 0 when there is still enough
data queued in the input for another period.
Handle 0 read_size in alsa-source and make it push out a 0 buffer,
this will then drain the resampler and make it ask for a new buffer
size. This makes the transition from one period to another more
seamless for the resampler.
Fixes#805
Always reschedule the timeout based on the new quantum. If the
quantum descreased we want to wait some more until the buffer only
has the new quantum of samples left.
Only adjust the timeout when the quantum increases so that we end u
with exactly the number of samples of the new quantum.
Suppose we are handling a quantum of 1024, we wake up with 1024
samples in the device, we now notice a quantum of 8192 and will pull
in the 8192 samples, we then have 1024 + 8192 samples in the buffer.
Schedule a timeout for 1024 samples so that we end up in the timout
with 8192 samples in the device.
Remove some magic constants that are not needed anymore with the
headroom.
Clamp the error to some reasonable value so that we don't adjust the
rate too much but still apply all of the correction calculated by the
dll.
Remove the bandwidth adjustment.
Also update the matching and resample fields when we reassign the
node to a new driver. This could cause the new follower to not activate
the adaptive resampler and get out of sync.
node.latency also influences the pipeline latency in that it can
push the latency above the default value.
node.max-latency, instead, is only used to clamp the final latency
of the pipeline.
When we have a rate or channels configured, set this in the hw_params
to restrict the enumeration of the remaining parameters. If we,
for example want 8 channels, some cards restrict the formats in that
case and we don't want to enumerate impossible combinations.
Fixes#782
Add save property to Profile and Route params to notify the session
manager that they should be saved. Let the session manager only save
the Profile and Routes with the save flag.
Make pulse-server set the save flag on Profile and Route changes.
The result is that we can make a difference between user requested
changes and automatical changes and only remember the user preferences.
When a port changes availability, first check if we need to perform
a profile switch, if not select the new best port.
The Pro Audio profile exposes all devices and subdevices with maximum
channel count and no channel layout. It also have no hardware volume
and is more suited for Pro Audio usage.
See #731#704#57
Disable automatic port configuration in acp and move the logic
to the session manager.
Implement initial port selection and restore on profile activation.
Implement route switch when unavailable
Implement port settings save.
Only poll events and set_param can cause a param changed events.
Keep track of all the changes in the param user data and at the
end of the poll/set_param emit one notification for all changed
params.
