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Commit Graph

24 Commits

Author SHA1 Message Date
14961e6bc7
ALSA backend: code cleanup and scoping and indent
This is combination of clang-format and manual edits.
The latter mainly to add braces and reduce scope of variables.
2021-05-16 00:49:06 +02:00
6801c2cac2
ALSA: add option to prefer interleaved access 2021-05-15 23:10:14 +02:00
e2bac27885
Remove unused API 2021-05-15 23:09:21 +02:00
0b97175d49
ALSA: fall back to nearest available buffer-size
The warning "samples per period does not match." never triggered.
Previously not being able to set the requested buffersize was a
fatal error.

This adds support for soundcards that only support msec.
e.g. recent HDA Intel via SOF (Sound Open Firmware)
2021-01-22 16:07:29 +01:00
60901d26b7
ALSA: improve debug output 2020-12-03 21:29:21 +01:00
c87ef15e82
ALSA: configure capture settings before playback
This fixes an issue with some soundcards e.g. "AxeFx III".
Device configuration fails unless set_hwpar() is performed
for the capture device before configuring the playack
device (half duplex is fine, too).
2020-11-04 14:46:49 +01:00
27f26f5cfd
Cont'd work on ALSA nperiods (amend 2326fb163) 2020-05-03 00:19:56 +02:00
2326fb1638
ALSA: only read/clear user-requested nperiods before snd_pcm_start
This should fix excessive latency with the RayDay that
has a fixed buffersize of 16384 samples.
2020-05-01 23:17:31 +02:00
8fa0049d28
ALSA: set start threshold to zero 2020-04-30 04:16:17 +02:00
11f68a02cd
Another step towards nperiod fixes for the RayDay 2020-04-30 02:05:14 +02:00
3a6a9cfa6c
Tweak ALSA nperiod setting, fallback to nearest
This is mainly for RME RayDAT that has a fixed buffersize of 16k:

  dev_name : hw:HDSPMxc2f6c5,0
  channels : 36
  min_rate : 32000
  max_rate : 192000
  min_bufz : 16384
  max_bufz : 16384
  min_nper : 4
  max_nper : 512

However nperiod configuration determines the effective latency
regardless.

This is similar to https://github.com/jackaudio/jack1/blob/master/drivers/alsa/alsa_driver.c#L476-L486
2020-04-29 23:56:24 +02:00
13ed8da2bc
Add flag to allow ALSA backend to fall back to nearest avail. nperiods 2020-04-28 02:51:20 +02:00
23baeee829
Tweak engine startup, initial silence
This can help when running with very low latency and the
initial process callback is [indirectly] expensive.

E.g. load a heavy session the a RPi4, initial setup can pull
in a lot of data, which blocks the bus.

In particular with the ALSA backend this can lead to poll timeout
which effectively stops the backend.
2020-03-30 15:20:54 +02:00
eea697b260
ALSA backend: try to recover from poll errors
When recover() successfully re-initializes the device,
processing can continue just like after an x-run.

This can happen during initial session load of "expensive"
sessions (in particular on slow systems, e.g. Raspberry Pi)
usually with synths. Worker thread pulls in many external
files in the background which blocks the bus for a long time.
resulting in a poll-timeout.
2020-03-28 22:06:12 +01:00
69cbcb84a6 spelling corrections from Jaromír Mikeš <mira.mikes@seznam.cz>
Corresponds to https://anonscm.debian.org/cgit/pkg-multimedia/ardour.git/tree/debian/patches/0070-spelling.patch
2016-10-17 17:57:39 -04:00
Kamil Rytarowski
1ac7dad84e NetBSD ships with pollts(2) similar to Linux specific ppoll() 2016-10-04 22:17:49 +02:00
Kamil Rytarowski
f69776e5b7 NetBSD ships with <sys/endian.h> not <endian.h> 2016-10-04 22:17:12 +02:00
a6f27f09a7 update ALSA backend: separate playback/capture periods
fixed: 2 for capture,  configurable 2,3 for playback.
2015-12-05 01:53:13 +01:00
6b4e5f1d47 ALSA: update error-codes for HW initialization. 2015-10-01 12:42:05 +02:00
94c146c780 prepare ALSA backend for half-duplex 2015-06-14 22:26:06 +02:00
397ce4ccc7 ALSA-Backend prefer ppoll() 2015-01-28 13:47:24 +01:00
8d6183bff5 ALSA backend: require both in+output. 2014-06-05 03:27:19 +02:00
03cb44f814 ALSABackend: elaborate on start-up error cases 2014-06-04 02:19:46 +02:00
8e9b02cfa2 ALSA backend (based on Dummy backend and zita-alsa-pcmi) 2014-06-02 19:23:07 +02:00