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96 lines
2.2 KiB
C++
96 lines
2.2 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "NonBlock.hxx"
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#include "Error.hxx"
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#include "event/MultiSocketMonitor.hxx"
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namespace Alsa {
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std::span<pollfd>
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NonBlock::CopyReturnedEvents(MultiSocketMonitor &m) noexcept
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{
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const std::span<pollfd> pfds = buffer;
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for (auto &i : pfds)
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i.revents = 0;
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m.ForEachReturnedEvent([pfds](SocketDescriptor s, unsigned events){
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for (auto &i : pfds) {
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if (i.fd == s.Get()) {
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i.revents = events;
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return;
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}
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}
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});
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return pfds;
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}
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Event::Duration
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NonBlockPcm::PrepareSockets(MultiSocketMonitor &m, snd_pcm_t *pcm)
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{
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int count = snd_pcm_poll_descriptors_count(pcm);
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if (count <= 0) {
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if (count == 0)
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throw std::runtime_error("snd_pcm_poll_descriptors_count() failed");
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else
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throw Alsa::MakeError(count, "snd_pcm_poll_descriptors_count() failed");
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}
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const auto pfds = base.Allocate(count);
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count = snd_pcm_poll_descriptors(pcm, pfds.data(), count);
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if (count <= 0) {
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if (count == 0)
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throw std::runtime_error("snd_pcm_poll_descriptors() failed");
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else
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throw Alsa::MakeError(count, "snd_pcm_poll_descriptors() failed");
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}
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m.ReplaceSocketList(pfds.first(count));
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return Event::Duration(-1);
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}
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void
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NonBlockPcm::DispatchSockets(MultiSocketMonitor &m, snd_pcm_t *pcm)
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{
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const auto pfds = base.CopyReturnedEvents(m);
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unsigned short dummy;
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int err = snd_pcm_poll_descriptors_revents(pcm, pfds.data(), pfds.size(), &dummy);
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if (err < 0)
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throw Alsa::MakeError(err, "snd_pcm_poll_descriptors_revents() failed");
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}
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Event::Duration
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NonBlockMixer::PrepareSockets(MultiSocketMonitor &m, snd_mixer_t *mixer) noexcept
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{
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int count = snd_mixer_poll_descriptors_count(mixer);
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if (count <= 0) {
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m.ClearSocketList();
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return Event::Duration(-1);
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}
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const auto pfds = base.Allocate(count);
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count = snd_mixer_poll_descriptors(mixer, pfds.data(), count);
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if (count < 0)
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count = 0;
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m.ReplaceSocketList(pfds.first(count));
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return Event::Duration(-1);
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}
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void
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NonBlockMixer::DispatchSockets(MultiSocketMonitor &m, snd_mixer_t *mixer) noexcept
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{
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const auto pfds = base.CopyReturnedEvents(m);
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unsigned short dummy;
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snd_mixer_poll_descriptors_revents(mixer, pfds.data(), pfds.size(), &dummy);
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}
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} // namespace Alsa
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