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

1 files changed, 236 insertions, 0 deletions

diff --git a/flow/audioiolibaudioio.cc b/flow/audioiolibaudioio.cc
new file mode 100644
index 0000000..e7c545e
--- /dev/null
+++ b/flow/audioiolibaudioio.cc
@@ -0,0 +1,236 @@
+    /*
+
+    Copyright (C) 2001 Robert Lunnon
+                       bob@yarrabee.net.au
+    Copyright (C) 2001 Stefan Westerfeld
+                       stefan@space.twc.de
+
+    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 'LibAudioIO' AudioIO class if libaudio was detected during
+ * configure
+ */
+#ifdef HAVE_LIBAUDIOIO
+
+#include <libaudioio.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>		// Needed on some systems.
+#endif
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <iostream>
+#include <algorithm>
+
+#include "debug.h"
+#include "audioio.h"
+
+namespace Arts {
+
+class AudioIOLibAudioIO : public AudioIO {
+protected:
+	int audio_fd;
+	int requestedFragmentSize;
+	int requestedFragmentCount;
+	SampleSpec_t spec;
+
+public:
+	AudioIOLibAudioIO();
+
+	void setParam(AudioParam param, int& value);
+	int getParam(AudioParam param);
+
+	bool open();
+	void close();
+	int read(void *buffer, int size);
+	int write(void *buffer, int size);
+};
+
+REGISTER_AUDIO_IO(AudioIOLibAudioIO,"libaudioio"," Portable Audio Library");
+};
+
+using namespace std;
+using namespace Arts;
+
+AudioIOLibAudioIO::AudioIOLibAudioIO()
+{
+	/*
+	 * default parameters
+	 */
+	param(samplingRate) = spec.rate=44100;
+	paramStr(deviceName) = "/dev/Audio";
+	requestedFragmentSize = param(fragmentSize) = 4096;
+	requestedFragmentCount  =spec.max_blocks= param(fragmentCount) = 7;
+	param(channels) = spec.channels=2;
+	param(direction) = 2;
+}
+
+bool AudioIOLibAudioIO::open()
+{
+	string& _error = paramStr(lastError);
+	string& _deviceName = paramStr(deviceName);
+	int& _channels = param(channels);
+	int& _fragmentSize = param(fragmentSize);
+	int& _fragmentCount = param(fragmentCount);
+	int& _samplingRate = param(samplingRate);
+	int& _format = param(format);
+
+	int mode;
+	spec.channels=_channels;
+	spec.max_blocks= param(fragmentCount);
+	spec.rate= _samplingRate;
+	spec.encoding= ENCODE_PCM;
+	spec.precision=16 ;
+	spec.endian=ENDIAN_NATURAL;
+	spec.disable_threads=1;
+
+	if(param(direction) == 3)
+		mode = O_RDWR|O_NDELAY;
+	else if(param(direction) == 2)
+		mode = O_WRONLY|O_NDELAY;
+	else
+	{
+		_error = "invalid direction";
+		return false;
+	}
+
+	audio_fd = ::AudioIOOpenX( mode, &spec,&spec );
+	if(audio_fd == -1)
+	{
+		_error = "device ";
+		_error += _deviceName.c_str();
+		_error += " can't be opened (";
+		_error += strerror(errno);
+		_error += ")";
+		return false;
+	}
+
+
+	/*
+	 * since we use spec.endian=ENDIAN_NATURAL we'll have little endian audio
+	 * on little endian machines and big endian audio on big endian machines:
+	 */
+#ifdef WORDS_BIGENDIAN
+	_format = 17;
+#else
+	_format = 16;
+#endif
+
+	spec.channels=_channels;
+
+	spec.rate = _samplingRate;
+
+
+	_fragmentSize = requestedFragmentSize;
+	spec.max_blocks=_fragmentCount = requestedFragmentCount;
+
+
+	artsdebug("buffering: %d fragments with %d bytes "
+		"(audio latency is %1.1f ms)", _fragmentCount, _fragmentSize,
+		(float)(_fragmentSize*_fragmentCount) /
+		(float)(2.0 * _samplingRate * _channels)*1000.0);
+
+	return(true);
+}
+
+void AudioIOLibAudioIO::close()
+{
+	::AudioIOClose();
+}
+
+void AudioIOLibAudioIO::setParam(AudioParam p, int& value)
+{
+	switch(p)
+	{
+		case fragmentSize:
+				param(p) = requestedFragmentSize = value;
+			break;
+		case fragmentCount:
+				param(p) = requestedFragmentCount = value;
+			break;
+		default:
+				param(p) = value;
+			break;
+	}
+}
+
+int AudioIOLibAudioIO::getParam(AudioParam p)
+{
+	switch(p)
+	{
+		case canRead:
+				return AudioIOCheckRead();
+			break;
+
+		case canWrite:
+				return (AudioIOCheckWriteReady()) ? (16*1024) : 0;
+				// Assume if writable can write 16K
+				// Arts Really doesn't care
+			break;
+
+		case selectReadFD:
+				return (param(direction) & directionRead)?audio_fd:-1;
+			break;
+
+		case selectWriteFD:
+				return (param(direction) & directionWrite)?audio_fd:-1;
+			break;
+
+		case autoDetect:
+				/*
+				 * if there is a "native" aRts driver, we'll rather use this
+				 * than the generic libaudioio one, because the native one
+				 * is likely to be better optimized to the needs of aRts than
+				 * a generic driver, so keep the value small
+				 */
+				return 3;
+			break;
+
+		default:
+				return param(p);
+			break;
+	}
+}
+
+int AudioIOLibAudioIO::read(void *buffer, int size)
+{
+	arts_assert(audio_fd != 0);
+	return ::AudioIORead(buffer,size);
+}
+
+int AudioIOLibAudioIO::write(void *buffer, int size)
+{
+	arts_assert(audio_fd != 0);
+	return ::AudioIOWrite(buffer,size);
+}
+
+#endif