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60 Commits

Author SHA1 Message Date
Max Kellermann
47dffe66aa output/alsa: fix race condition on early snd_pcm_writei() error 
During UnlockActivate() while the mutex is unlocked, the IOThread can
set a new error condition, and will never again wake up the
OutputThread.  This race condition can cause a deadlock in the
OutputThread.
 2017-02-15 11:23:44 +01:00
Max Kellermann
4a80e9cb25 output/alsa: copy the PcmExport result to the ring_buffer 
.. and not the input data.

Regression from commit b1c7649edb (integer underflow).

 https://bugs.musicpd.org/view.php?id=4639
 2017-02-10 22:23:00 +01:00
Max Kellermann
cfd056231b output/alsa: use the EventLoop& parameter instead of io_thread_get() 2017-02-10 21:21:15 +01:00
Max Kellermann
b1c7649edb output/alsa: non-blocking mode 
Use SND_PCM_NONBLOCK, and perform all snd_pcm_writei() calls in the
IOThread.  Use a lockless queue to copy data from the OutputThread to
the IOThread.

This rather major change aims to improve MPD's internal latency.  All
waits are now under MPD's control, instead of blocking inside
libasound2.

As a side effect, an output's filter is now decoupled from the actual
device I/O, which solves a major latency problem with the conversion
filter on slow CPUs and small period buffers.  See:

 https://bugs.musicpd.org/view.php?id=3900
 2017-02-09 21:36:18 +01:00
Max Kellermann
8fd9d91974 output/Plugin: pass EventLoop& to init() 
Eliminate dependency on io_thread_get().
 2017-01-25 22:54:41 +01:00
Max Kellermann
6b968beede output/alsa: convert to class, make attributes private 2017-01-24 23:08:16 +01:00
Max Kellermann
f68dd1bffb output/alsa: make AlsaSetup() an AlsaOutput method 2017-01-24 23:06:33 +01:00
Max Kellermann
f92b71ca99 output/alsa: move code from AlsaSetup() to AlsaSetupSw() 2017-01-24 23:05:29 +01:00
Max Kellermann
2b79fe2d6a output/alsa: move code from AlsaSetup() to AlsaSetupHw() 2017-01-24 22:48:48 +01:00
Max Kellermann
4ad0747c78 output/alsa: explicitly mention all snd_pcm_state() enums 
I want a compiler warning when a new state needs to be considered
here.
 2017-01-14 20:49:15 +01:00
Max Kellermann
df578c91ad output/alsa: log DoP mode 2017-01-11 22:50:40 +01:00
Max Kellermann
70008c47c9 output/alsa: support DSD_U16 2017-01-11 22:47:21 +01:00
Max Kellermann
8364029db8 output/alsa: move code to PlayRaw() 2017-01-11 21:38:05 +01:00
Max Kellermann
78a73eac53 pcm/Export: add (dummy) method Cancel() 
We'll have some code for it soon.
 2017-01-11 15:41:28 +01:00
Max Kellermann
9c4df66925 pcm/Export: halve the sample rate for DoP 
Move this sample rate fixup from the ALSA output plugin to PcmExport,
where it belongs.
 2017-01-11 10:33:23 +01:00
Max Kellermann
c143adba91 pcm/Export: add CalcOutputSampleRate(), CalcInputSampleRate() 
Prepare for DSD sample rate fixups.
 2017-01-10 23:48:26 +01:00
Max Kellermann
5900253b85 update copyright year 2017-01-03 20:48:59 +01:00
Max Kellermann
35a2a48c47 Merge branch 'v0.19.x' 2016-11-17 22:20:24 +01:00
Max Kellermann
5c3e55b5b1 {input,output}/alsa: fix gcc 7.0 -Wimplicit-fallthrough 2016-11-16 19:50:38 +01:00
Max Kellermann
d9cb85df83 output/Plugin: remove 'Error&' parameters, use C++ exceptions only 2016-11-09 12:36:21 +01:00
Max Kellermann
b35bb1b50c output/alsa: use C++ initializers 2016-11-04 11:31:23 +01:00
Max Kellermann
6341be9cdf output/alsa: migrate from class Error to C++ exceptions 2016-11-04 11:31:23 +01:00
Max Kellermann
93a14a93f9 output/alsa: use Error::FormatPrefix() 2016-11-04 11:31:23 +01:00
Max Kellermann
f6f2a3b366 output/alsa: throw C++ exception on init error 2016-10-28 22:56:27 +02:00
Max Kellermann
92f54f0b59 output/alsa: disable DoP if it fails 
See http://bugs.musicpd.org/view.php?id=4496
 2016-02-28 10:19:19 +01:00
Max Kellermann
ddce544b53 output/alsa: move the PcmExport::Open() call to Open() 2016-02-28 10:15:54 +01:00
Max Kellermann
21fb7eea82 output/alsa: probe DSD_U32 if DSD_U8 fails 
See http://bugs.musicpd.org/view.php?id=4485
 2016-02-28 09:59:09 +01:00
Max Kellermann
fd7eb43366 output/alsa: use CamelCase 2016-02-28 09:44:15 +01:00
Max Kellermann
a1add27c4c output/alsa: fix indent 2016-02-28 09:35:57 +01:00
Max Kellermann
fc8194ee1e output/alsa: fix typo 2016-02-28 09:35:55 +01:00
Max Kellermann
8ffcdb73e8 output/alsa: remove option "use_mmap" 
MPD does not really take advantage of memory-mapped I/O by generating
data right into the ALSA buffer; using plain snd_pcm_mmap_writei() has
no advantage compared to snd_pcm_writei().  Let's kill this
non-feature.
 2016-02-28 09:30:59 +01:00
Max Kellermann
111528e51c output/alsa: add #ifdef ENABLE_DSD 
Fixes the --disable-dsd build.

See http://bugs.musicpd.org/view.php?id=4498
 2016-02-28 07:29:37 +01:00
Max Kellermann
c9761bf6af output/alsa: pass PcmExport::Params to alsa_setup() 2016-02-27 07:35:35 +01:00
Max Kellermann
4a47265224 output/alsa: pass PcmExport::Params to SetupDop() 2016-02-27 07:34:58 +01:00
Max Kellermann
f0f3017a76 pcm/export: move Open() parameters to struct Params 2016-02-26 18:55:27 +01:00
Max Kellermann
6a53fb33da output/alsa: basic infrastructure for DSD_U16 and DSD_U32 2016-02-26 18:44:58 +01:00
Max Kellermann
1d67aa7bf2 update copyright year to 2016 2016-02-26 17:54:05 +01:00
Max Kellermann
15e432204e pcm/Order: new library to convert from FLAC to ALSA channel order 
This new library is integrated in the PcmExport class and (if enabled)
converts MPD's channel order (= FLAC channel order) to ALSA channel
order.

This fixes:
 http://bugs.musicpd.org/view.php?id=3147
and
 http://bugs.musicpd.org/view.php?id=3255
 2015-10-27 11:44:23 +01:00
Max Kellermann
4fa5538e2b config/Param: split block-specific attributes to new struct ConfigBlock 
The old struct config_param remains only for top-level string options.
 2015-01-21 23:56:33 +01:00
Max Kellermann
153f5854e2 output/alsa: move functions into the struct 2015-01-04 19:53:56 +01:00
Max Kellermann
712ed555e6 Copyright year 2015 2015-01-01 19:48:13 +01:00
Max Kellermann
8397196fbb output/alsa: change a few "dsd" to "dop" 2014-09-26 11:07:53 +02:00
Max Kellermann
e5a28bfd8d output/alsa, pcm: rename "DSD over USB" to "DoP" 
The standard has been renamed since the early draft that was
implemented in MPD.
 2014-08-31 16:12:26 +02:00
Max Kellermann
6e04d66a35 release v0.18.13 
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Merge tag 'v0.18.13'
 2014-08-31 15:03:34 +02:00
Max Kellermann
a4f9d6d98b output/alsa: fix signed/unsigned comparison warning 2014-08-30 00:27:01 +02:00
Max Kellermann
2d096a569a output/alsa: fix coding style 2014-08-26 10:25:59 +02:00
Max Kellermann
e44ea5038e output/alsa: merge Init() into Configure() 2014-08-26 10:22:35 +02:00
Max Kellermann
9d79c72c17 output/alsa: add API documentation 2014-08-26 09:37:30 +02:00
Max Kellermann
a86aaef4d0 output/alsa: support native DSD playback 
Translate SampleFormat::DSD to SND_PCM_FORMAT_DSD_U8, which was added
to alsa-lib 1.0.27.1.
 2014-08-26 07:11:53 +02:00
Max Kellermann
e463244db3 output/alsa: move alsa_configure() into the class 2014-08-26 07:10:16 +02:00