summaryrefslogtreecommitdiffstats
path: root/flow/audioiosgi.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'flow/audioiosgi.cpp')
-rw-r--r--flow/audioiosgi.cpp274
1 files changed, 274 insertions, 0 deletions
diff --git a/flow/audioiosgi.cpp b/flow/audioiosgi.cpp
new file mode 100644
index 0000000..72e1782
--- /dev/null
+++ b/flow/audioiosgi.cpp
@@ -0,0 +1,274 @@
+ /*
+
+ Copyright (C) 2001 Carsten Kroll
+ ckroll@pinnaclesys.com
+
+ 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 'sgi' AudioIO class if compiled under IRIX
+ */
+#ifdef HAVE_IRIX
+
+#include <dmedia/audio.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 AudioIOSGI : public AudioIO {
+protected:
+ int requestedFragmentSize;
+ int requestedFragmentCount;
+ ALport audio_port,audio_port1;
+ ALconfig audioconfig;
+ int framesz;
+
+public:
+ AudioIOSGI();
+
+ 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(AudioIOSGI,"sgi","SGI dmedia Audio I/O");
+};
+
+using namespace std;
+using namespace Arts;
+
+AudioIOSGI::AudioIOSGI()
+{
+ /*
+ * default parameters
+ */
+ param(samplingRate) = 44100;
+ paramStr(deviceName) = "audioio";
+ requestedFragmentSize = param(fragmentSize) = 4096;
+ requestedFragmentCount = param(fragmentCount) = 10;
+ audio_port=0;
+ audio_port1=0;
+ param(format)=17;
+ param(channels) = 2;
+ param(direction) = 2;
+}
+
+bool AudioIOSGI::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& _direction = param(direction);
+ int err;
+
+ if(_direction != 3 && _direction != 2){
+ _error = "invalid direction";
+ return false;
+ }
+ framesz=((_format & ~1) >> 3) * _channels;
+
+ audioconfig = alNewConfig();
+ alSetSampFmt(audioconfig,AL_SAMPFMT_TWOSCOMP);
+
+ alSetWidth(audioconfig, _format==8 ? AL_SAMPLE_8 : _format==16 || _format==17 ? AL_SAMPLE_16 : AL_SAMPLE_24);
+ alSetQueueSize(audioconfig,(requestedFragmentSize * requestedFragmentCount) / framesz);
+ alSetChannels(audioconfig,_channels);
+
+ audio_port = alOpenPort("out","w",audioconfig);
+
+
+ if (audio_port == (ALport) 0 ) {
+ err = oserror();
+ if (err == AL_BAD_NO_PORTS) {
+ _error = "System is out of audio ports";
+ } else if (err == AL_BAD_DEVICE_ACCESS) {
+ _error = "Couldn't access audio device";
+ } else if (err == AL_BAD_OUT_OF_MEM) {
+ _error = "Out of memory";
+ }
+ close();
+ return false;
+ }
+ if (_direction == 3){
+ audio_port1 = alOpenPort("in","r",audioconfig);
+ if (audio_port1 == (ALport) 0 ) {
+ err = oserror();
+ if (err == AL_BAD_NO_PORTS) {
+ _error = "System is out of audio ports";
+ } else if (err == AL_BAD_DEVICE_ACCESS) {
+ _error = "Couldn't access audio device";
+ } else if (err == AL_BAD_OUT_OF_MEM) {
+ _error = "Out of memory";
+ }
+ close();
+ return false;
+ }
+ }
+ /*
+ * Attempt to set a crystal-based sample-rate on the
+ * given device.
+ */
+ ALpv x[2];
+ x[0].param = AL_MASTER_CLOCK;
+ x[0].value.i = AL_CRYSTAL_MCLK_TYPE;
+ x[1].param = AL_RATE;
+ x[1].value.ll = alDoubleToFixed(double(_samplingRate));
+ if (alSetParams(alGetResource(audio_port),x, 2)<0) {
+ _error="setparams failed: ";
+ _error+=alGetErrorString(oserror());
+ close();
+ return false;
+ }
+ if (_direction == 3)
+ if (alSetParams(alGetResource(audio_port1),x, 2)<0) {
+ _error="setparams failed: ";
+ _error+=alGetErrorString(oserror());
+ close();
+ return false;
+ }
+ if (x[1].sizeOut < 0) {
+ _error="rate was invalid";
+ close();
+ return false;
+ }
+
+ alSetFillPoint(audio_port,(alGetQueueSize(audioconfig)*5)/10) ;//50 %
+ if (_direction == 3)
+ alSetFillPoint(audio_port1,(alGetQueueSize(audioconfig)*4)/10) ;//40 %
+ /*
+ * set the fragment settings to what the user requested
+ */
+
+ _fragmentSize = requestedFragmentSize;
+ _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 AudioIOSGI::close()
+{
+ alFreeConfig(audioconfig);
+ alClosePort(audio_port);
+ audio_port=0;
+ if (param(direction) == 3) {
+ alClosePort(audio_port1);
+ audio_port1=0;
+ }
+}
+
+void AudioIOSGI::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 AudioIOSGI::getParam(AudioParam p)
+{
+ int frames;
+ switch(p)
+ {
+ case canRead:
+ frames=alGetFilled(audio_port);
+ return frames*framesz;
+ break;
+
+ case canWrite:
+ frames=alGetFillable(audio_port);
+ return frames*framesz;
+ break;
+
+ case selectReadFD:
+ return (param(direction) & directionRead)?
+ alGetFD(audio_port1):-1;
+ break;
+
+ case selectWriteFD:
+ return (param(direction) & directionWrite)?
+ alGetFD(audio_port):-1;
+ break;
+
+ default:
+ return param(p);
+ break;
+ }
+}
+
+int AudioIOSGI::read(void *buffer, int size)
+{
+ arts_assert(audio_port1 != 0);
+ ::alReadFrames(audio_port1,buffer,size/framesz);
+ return size;
+}
+
+int AudioIOSGI::write(void *buffer, int size)
+{
+ arts_assert(audio_port != 0);
+ ::alWriteFrames(audio_port,buffer,size/framesz);
+ return size;
+}
+
+#endif