From 247750abcbf6760bbc52aa5d64fc375d6fbee8a3 Mon Sep 17 00:00:00 2001
From: Michele Calgaro <michele.calgaro@yahoo.it>
Date: Sun, 6 Dec 2020 19:28:06 +0900
Subject: Renaming of files in preparation for code style tools.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 00d4f92b717fbcbed6f9eee361975d6ee5380d59)
---
 flow/audioionas.cpp | 260 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 260 insertions(+)
 create mode 100644 flow/audioionas.cpp

(limited to 'flow/audioionas.cpp')

diff --git a/flow/audioionas.cpp b/flow/audioionas.cpp
new file mode 100644
index 0000000..543d8c0
--- /dev/null
+++ b/flow/audioionas.cpp
@@ -0,0 +1,260 @@
+    /*
+
+    Copyright (C) 2001 Jochen Hoenicke
+                       jochen@gnu.org
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+  
+    This library 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
+    Library General Public License for more details.
+   
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+
+    */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+/**
+ * only compile nas AudioIO class if libaudio was detected during
+ * configure
+ */
+#ifdef HAVE_LIBAUDIONAS
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <iostream>
+
+#include "audioio.h"
+#include "audiosubsys.h"
+#include "iomanager.h"
+#include "dispatcher.h"
+
+#include <audio/audiolib.h>
+
+namespace Arts {
+
+static AuBool
+eventHandler(AuServer *, AuEvent *ev, AuEventHandlerRec *handler);
+
+class AudioIONAS : public AudioIO, public IONotify {
+protected:
+	AuServer *aud;
+	AuDeviceID device;
+	AuFlowID flow;
+	AuElement elements[2];
+
+	int freeBytes;
+
+public:
+	AudioIONAS();
+
+	void setParam(AudioParam param, int& value);
+	int getParam(AudioParam param);
+
+	bool open();
+	void close();
+	void run();
+	void notifyIO(int, int);
+	int read(void *buffer, int size);
+	int write(void *buffer, int size);
+
+	friend AuBool 
+	eventHandler(AuServer *, AuEvent *ev, AuEventHandlerRec *handler);
+};
+
+REGISTER_AUDIO_IO(AudioIONAS,"nas","Network Audio System");
+}
+
+using namespace std;
+using namespace Arts;
+
+static AuBool
+Arts::eventHandler(AuServer *, AuEvent *ev, AuEventHandlerRec *handler)
+{
+	AudioIONAS *nas = (AudioIONAS *) handler->data;
+	if (ev->type == AuEventTypeElementNotify)
+	{
+		AuElementNotifyEvent *event = (AuElementNotifyEvent *) ev;
+		
+		switch (event->kind)
+		{
+		case AuElementNotifyKindLowWater:
+			nas->freeBytes += event->num_bytes;
+			AudioSubSystem::the()->handleIO
+				(AudioSubSystem::ioWrite);
+			break;
+		case AuElementNotifyKindState:
+			if (event->cur_state ==  AuStatePause
+			    && event->reason != AuReasonUser)
+			{
+				nas->freeBytes += event->num_bytes;
+				AudioSubSystem::the()->handleIO
+					(AudioSubSystem::ioWrite);
+			}
+			break;
+		}
+	}
+	return true;
+}
+
+AudioIONAS::AudioIONAS()
+{
+	/*
+	 * default parameters
+	 */
+	param(samplingRate) = 11025;
+	paramStr(deviceName) = "null";
+	param(fragmentSize) = 1024;
+	param(fragmentCount) = 7;
+	param(format) = 16;
+	param(channels) = 2;
+	param(direction) = 2;
+}
+
+bool AudioIONAS::open()
+{
+	char *server_msg;
+	
+	int& _channels = param(channels);
+	int& _direction = param(direction);
+	int& _fragmentSize = param(fragmentSize);
+	int& _fragmentCount = param(fragmentCount);
+	int& _samplingRate = param(samplingRate);
+	int& _format = param(format);
+	string& _device = paramStr(deviceName);
+	string& _error = paramStr(lastError);
+	int  _buf_samples, i;
+
+	if((_direction & directionRead))
+	{
+		_error = "no record audio device";
+		return false;
+	}
+
+	aud = AuOpenServer(_device.compare("null") == 0 
+			   ? NULL : _device.c_str(), 
+			   0, NULL, 0, NULL, &server_msg);
+	if(aud == NULL)
+	{
+		_error = "device ";
+		_error += _device;
+		_error += " can't be opened (";
+		_error += server_msg;
+		_error += ")";
+		return false;
+	}
+
+	device = AuNone;
+	for (i = 0; i < AuServerNumDevices(aud); i++) 
+	{
+		AuDeviceAttributes *devattr = AuServerDevice(aud, i);
+		if (AuDeviceKind(devattr) == AuComponentKindPhysicalOutput
+		    && AuDeviceNumTracks(devattr) == _channels)
+		{
+			device = AuDeviceIdentifier(devattr);
+			break;
+		}
+	}
+				  
+	if (device == AuNone)
+	{
+		_error = "Couldn't find an output device";
+		return false;
+	}
+
+	if (!(flow = AuCreateFlow(aud, NULL)))
+	{
+		_error = "Couldn't create flow";
+		return false;
+	}
+
+	_buf_samples = _fragmentSize;
+	AuMakeElementImportClient(&elements[0], _samplingRate,
+				  _format == 8 ? AuFormatLinearUnsigned8
+				  : AuFormatLinearSigned16LSB,
+				  _channels, AuTrue,
+				  _buf_samples * _fragmentCount,
+				  _buf_samples * (_fragmentCount)/2,
+				  0, NULL);
+	AuMakeElementExportDevice(&elements[1], 0, device, _samplingRate,
+				  AuUnlimitedSamples, 0, NULL);
+	AuSetElements(aud, flow, AuTrue, 2, elements, NULL);
+	AuRegisterEventHandler(aud, AuEventHandlerIDMask, 0, flow,
+			       eventHandler, (AuPointer) this);
+
+	freeBytes = 0;
+	AuStartFlow(aud, flow, NULL);
+
+	Dispatcher::the()->ioManager()->watchFD(aud->fd, IOType::read, this);
+
+	AuHandleEvents(aud);
+	return true;
+}
+
+void AudioIONAS::close()
+{
+	Dispatcher::the()->ioManager()->remove(this, IOType::all);
+	AuWriteElement(aud, flow, 0, 0, NULL, AuTrue, NULL);
+	AuCloseServer(aud);
+	aud = NULL;
+}
+
+void AudioIONAS::setParam(AudioParam p, int& value)
+{
+	param(p) = value;
+}
+
+int AudioIONAS::getParam(AudioParam p)
+{
+	switch(p)
+	{
+	case canWrite:
+		return freeBytes;
+		
+	default:
+		return param(p);
+	}
+}
+
+void AudioIONAS::notifyIO(int, int)
+{
+	AuHandleEvents(aud);
+}
+
+int AudioIONAS::read(void *, int )
+{
+	return 0;
+}
+
+int AudioIONAS::write(void *buffer, int size)
+{
+	if (size > freeBytes)
+		size = freeBytes;
+	if (size > 0)
+		AuWriteElement(aud, flow, 0, size, buffer, AuFalse, NULL);
+	freeBytes -= size;
+	if (freeBytes > 0)
+		AudioSubSystem::the()->handleIO(AudioSubSystem::ioWrite);
+	return size;
+}
+
+#endif
-- 
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