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authortpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-01-05 00:01:18 +0000
committertpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-01-05 00:01:18 +0000
commit42995d7bf396933ee60c5f89c354ea89cf13df0d (patch)
treecfdcea0ac57420e7baf570bfe435e107bb842541 /flow/audioionas.cc
downloadarts-42995d7bf396933ee60c5f89c354ea89cf13df0d.tar.gz
arts-42995d7bf396933ee60c5f89c354ea89cf13df0d.zip
Copy of aRts for Trinity modifications
git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/dependencies/arts@1070145 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
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+ /*
+
+ 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, 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