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output/alsa: make "mode" const

This commit is contained in:
Max Kellermann 2021-10-23 11:38:57 +02:00
parent 46c82259f7
commit 0f84332654
1 changed files with 24 additions and 15 deletions
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39
src/output/plugins/AlsaOutputPlugin.cxx
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@ -93,7 +93,7 @@ class AlsaOutput final
const unsigned period_time;
/** the mode flags passed to snd_pcm_open */
int mode = 0;
const int mode;
std::forward_list<Alsa::AllowedFormat> allowed_formats;
@ -408,21 +408,11 @@ private:
static constexpr Domain alsa_output_domain("alsa_output");
AlsaOutput::AlsaOutput(EventLoop &_loop, const ConfigBlock &block)
:AudioOutput(FLAG_ENABLE_DISABLE),
MultiSocketMonitor(_loop),
defer_invalidate_sockets(_loop, BIND_THIS_METHOD(InvalidateSockets)),
silence_timer(_loop, BIND_THIS_METHOD(OnSilenceTimer)),
device(block.GetBlockValue("device", "")),
#ifdef ENABLE_DSD
dop_setting(block.GetBlockValue("dop", false) ||
/* legacy name from MPD 0.18 and older: */
block.GetBlockValue("dsd_usb", false)),
#endif
buffer_time(block.GetPositiveValue("buffer_time",
MPD_ALSA_BUFFER_TIME_US)),
period_time(block.GetPositiveValue("period_time", 0U))
static int
GetAlsaOpenMode(const ConfigBlock &block)
{
int mode = 0;
#ifdef SND_PCM_NO_AUTO_RESAMPLE
if (!block.GetBlockValue("auto_resample", true))
mode |= SND_PCM_NO_AUTO_RESAMPLE;
@ -438,6 +428,25 @@ AlsaOutput::AlsaOutput(EventLoop &_loop, const ConfigBlock &block)
mode |= SND_PCM_NO_AUTO_FORMAT;
#endif
return mode;
}
AlsaOutput::AlsaOutput(EventLoop &_loop, const ConfigBlock &block)
:AudioOutput(FLAG_ENABLE_DISABLE),
MultiSocketMonitor(_loop),
defer_invalidate_sockets(_loop, BIND_THIS_METHOD(InvalidateSockets)),
silence_timer(_loop, BIND_THIS_METHOD(OnSilenceTimer)),
device(block.GetBlockValue("device", "")),
#ifdef ENABLE_DSD
dop_setting(block.GetBlockValue("dop", false) ||
/* legacy name from MPD 0.18 and older: */
block.GetBlockValue("dsd_usb", false)),
#endif
buffer_time(block.GetPositiveValue("buffer_time",
MPD_ALSA_BUFFER_TIME_US)),
period_time(block.GetPositiveValue("period_time", 0U)),
mode(GetAlsaOpenMode(block))
{
const char *allowed_formats_string =
block.GetBlockValue("allowed_formats", nullptr);
if (allowed_formats_string != nullptr)