output/Control: drop "Output" prefix from file name

src/output/Control.cxx

@@ -0,0 +1,285 @@
+/*
+ * Copyright 2003-2017 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "Internal.hxx"
+#include "OutputPlugin.hxx"
+#include "Domain.hxx"
+#include "mixer/MixerControl.hxx"
+#include "notify.hxx"
+#include "filter/plugins/ReplayGainFilterPlugin.hxx"
+#include "Log.hxx"
+
+#include <stdexcept>
+
+#include <assert.h>
+
+/** after a failure, wait this duration before
+    automatically reopening the device */
+static constexpr PeriodClock::Duration REOPEN_AFTER = std::chrono::seconds(10);
+
+struct notify audio_output_client_notify;
+
+void
+AudioOutput::WaitForCommand()
+{
+	while (!IsCommandFinished()) {
+		mutex.unlock();
+		audio_output_client_notify.Wait();
+		mutex.lock();
+	}
+}
+
+void
+AudioOutput::CommandAsync(Command cmd)
+{
+	assert(IsCommandFinished());
+
+	command = cmd;
+	cond.signal();
+}
+
+void
+AudioOutput::CommandWait(Command cmd)
+{
+	CommandAsync(cmd);
+	WaitForCommand();
+}
+
+void
+AudioOutput::LockCommandWait(Command cmd)
+{
+	const std::lock_guard<Mutex> protect(mutex);
+	CommandWait(cmd);
+}
+
+void
+AudioOutput::EnableAsync()
+{
+	if (!thread.IsDefined()) {
+		if (plugin.enable == nullptr) {
+			/* don't bother to start the thread now if the
+			   device doesn't even have a enable() method;
+			   just assign the variable and we're done */
+			really_enabled = true;
+			return;
+		}
+
+		StartThread();
+	}
+
+	CommandAsync(Command::ENABLE);
+}
+
+void
+AudioOutput::DisableAsync()
+{
+	if (!thread.IsDefined()) {
+		if (plugin.disable == nullptr)
+			really_enabled = false;
+		else
+			/* if there's no thread yet, the device cannot
+			   be enabled */
+			assert(!really_enabled);
+
+		return;
+	}
+
+	CommandAsync(Command::DISABLE);
+}
+
+inline bool
+AudioOutput::Open(const AudioFormat audio_format, const MusicPipe &mp)
+{
+	assert(allow_play);
+	assert(audio_format.IsValid());
+
+	fail_timer.Reset();
+
+	if (open && audio_format == request.audio_format) {
+		assert(request.pipe == &mp || (always_on && pause));
+
+		if (!pause)
+			/* already open, already the right parameters
+			   - nothing needs to be done */
+			return true;
+	}
+
+	request.audio_format = audio_format;
+	request.pipe = &mp;
+
+	if (!thread.IsDefined())
+		StartThread();
+
+	CommandWait(Command::OPEN);
+	const bool open2 = open;
+
+	if (open2 && mixer != nullptr) {
+		try {
+			mixer_open(mixer);
+		} catch (const std::runtime_error &e) {
+			FormatError(e, "Failed to open mixer for '%s'", name);
+		}
+	}
+
+	return open2;
+}
+
+void
+AudioOutput::CloseWait()
+{
+	assert(allow_play);
+
+	if (mixer != nullptr)
+		mixer_auto_close(mixer);
+
+	assert(!open || !fail_timer.IsDefined());
+
+	if (open)
+		CommandWait(Command::CLOSE);
+	else
+		fail_timer.Reset();
+}
+
+bool
+AudioOutput::LockUpdate(const AudioFormat audio_format,
+			const MusicPipe &mp,
+			bool force)
+{
+	const std::lock_guard<Mutex> protect(mutex);
+
+	if (enabled && really_enabled) {
+		if (force || !fail_timer.IsDefined() ||
+		    fail_timer.Check(REOPEN_AFTER * 1000)) {
+			return Open(audio_format, mp);
+		}
+	} else if (IsOpen())
+		CloseWait();
+
+	return false;
+}
+
+void
+AudioOutput::LockPlay()
+{
+	const std::lock_guard<Mutex> protect(mutex);
+
+	assert(allow_play);
+
+	if (IsOpen() && !in_playback_loop && !woken_for_play) {
+		woken_for_play = true;
+		cond.signal();
+	}
+}
+
+void
+AudioOutput::LockPauseAsync()
+{
+	if (mixer != nullptr && plugin.pause == nullptr)
+		/* the device has no pause mode: close the mixer,
+		   unless its "global" flag is set (checked by
+		   mixer_auto_close()) */
+		mixer_auto_close(mixer);
+
+	const std::lock_guard<Mutex> protect(mutex);
+
+	assert(allow_play);
+	if (IsOpen())
+		CommandAsync(Command::PAUSE);
+}
+
+void
+AudioOutput::LockDrainAsync()
+{
+	const std::lock_guard<Mutex> protect(mutex);
+
+	assert(allow_play);
+	if (IsOpen())
+		CommandAsync(Command::DRAIN);
+}
+
+void
+AudioOutput::LockCancelAsync()
+{
+	const std::lock_guard<Mutex> protect(mutex);
+
+	if (IsOpen()) {
+		allow_play = false;
+		CommandAsync(Command::CANCEL);
+	}
+}
+
+void
+AudioOutput::LockAllowPlay()
+{
+	const std::lock_guard<Mutex> protect(mutex);
+
+	allow_play = true;
+	if (IsOpen())
+		cond.signal();
+}
+
+void
+AudioOutput::LockRelease()
+{
+	if (always_on)
+		LockPauseAsync();
+	else
+		LockCloseWait();
+}
+
+void
+AudioOutput::LockCloseWait()
+{
+	assert(!open || !fail_timer.IsDefined());
+
+	const std::lock_guard<Mutex> protect(mutex);
+	CloseWait();
+}
+
+void
+AudioOutput::StopThread()
+{
+	assert(thread.IsDefined());
+	assert(allow_play);
+
+	LockCommandWait(Command::KILL);
+	thread.Join();
+}
+
+void
+AudioOutput::BeginDestroy()
+{
+	if (mixer != nullptr)
+		mixer_auto_close(mixer);
+
+	if (thread.IsDefined()) {
+		const std::lock_guard<Mutex> protect(mutex);
+		CommandAsync(Command::KILL);
+	}
+}
+
+void
+AudioOutput::FinishDestroy()
+{
+	if (thread.IsDefined())
+		thread.Join();
+
+	audio_output_free(this);
+}