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-rw-r--r--flow/audioiocsl.cc640
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diff --git a/flow/audioiocsl.cc b/flow/audioiocsl.cc
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+ /*
+
+ Copyright (C) 2000-2002 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 'csl' AudioIO class if libcsl is present
+ */
+#ifdef HAVE_LIBCSL
+#include <csl/csl.h>
+
+/* g_newa */
+#include <gsl/gsldefs.h>
+
+#include <vector>
+
+#include "audioio.h"
+#include "audiosubsys.h"
+#include "debug.h"
+#include "dispatcher.h"
+#include "iomanager.h"
+
+namespace Arts {
+
+class AudioIOCSL : public AudioIO,
+ public IONotify
+{
+protected:
+ CslPcmStream *inputStream, *outputStream;
+ CslDriver *cslDriver;
+ int requestedFragmentSize;
+ int requestedFragmentCount;
+ const char *cslDriverName;
+
+ std::vector<CslPollFD> cslFds, cslOldFds;
+ int csl2iomanager(int cslTypes);
+ void updateFds();
+
+ void notifyIO(int fd, int types);
+ static void handleRead(void *user_data, CslPcmStream *stream);
+ static void handleWrite(void *user_data, CslPcmStream *stream);
+
+public:
+ AudioIOCSL(const char *driverName = 0);
+
+ 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(AudioIOCSL,"csl","Common Sound Layer");
+
+class AudioIOCSLFactory : public AudioIOFactory {
+protected:
+ const char *driverName;
+ std::string _name;
+ std::string _fullName;
+
+public:
+ AudioIOCSLFactory(const char *driverName)
+ : driverName(driverName)
+ {
+ _name = "csl-";
+ _name += driverName;
+
+ _fullName = "Common Sound Layer (";
+ _fullName += driverName;
+ _fullName += ")";
+ }
+ virtual ~AudioIOCSLFactory()
+ {
+ }
+ AudioIO *createAudioIO() { return new AudioIOCSL(driverName); }
+ virtual const char *name() { return _name.c_str(); }
+ virtual const char *fullName() { return _fullName.c_str(); }
+};
+
+static class AudioIOCSLInit {
+protected:
+ std::list<AudioIOCSLFactory *> factories;
+
+public:
+ AudioIOCSLInit()
+ {
+ unsigned int i,n;
+ const char **drivers = csl_list_drivers(&n);
+
+ for(i = 0; i < n; i++)
+ factories.push_back(new AudioIOCSLFactory(drivers[i]));
+ }
+ ~AudioIOCSLInit()
+ {
+ std::list<AudioIOCSLFactory *>::iterator i;
+ for(i = factories.begin(); i != factories.end(); i++)
+ delete (*i);
+
+ factories.clear();
+ }
+} aci;
+
+};
+
+using namespace std;
+using namespace Arts;
+
+AudioIOCSL::AudioIOCSL(const char *driverName)
+ : cslDriverName(driverName)
+{
+ /*
+ * default parameters
+ */
+ param(samplingRate) = 44100;
+ paramStr(deviceName) = "todo";
+ requestedFragmentSize = param(fragmentSize) = 1024;
+ requestedFragmentCount = param(fragmentCount) = 7;
+ param(channels) = 2;
+ param(direction) = 2;
+
+#ifdef WORDS_BIGENDIAN
+ param(format) = 17;
+#else
+ param(format) = 16;
+#endif
+}
+
+bool AudioIOCSL::open()
+{
+ string& errorMsg = 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 fmt = 0;
+ char *env = 0;
+
+ if(cslDriverName && strcmp(cslDriverName, "arts") == 0)
+ env = arts_strdup_printf("ARTS_SERVER=%s",_deviceName.c_str());
+
+ if(env)
+ {
+ putenv(env);
+ arts_debug("AudioIOCsl: set %s\n",env);
+ }
+
+ CslErrorType error;
+ error = csl_driver_init(cslDriverName, &cslDriver); /* choose backend */
+
+ if(env)
+ {
+ putenv("ARTS_SERVER");
+ free(env);
+ }
+
+ if (error)
+ {
+ errorMsg = "unable to initialize CSL driver: ";
+ errorMsg += csl_strerror(error);
+ return false;
+ }
+
+ if(_format == 8)
+ fmt = CSL_PCM_FORMAT_U8;
+ else if(_format == 16)
+ fmt = CSL_PCM_FORMAT_S16_LE;
+ else if(_format == 17)
+ fmt = CSL_PCM_FORMAT_S16_BE;
+
+ inputStream = outputStream = 0;
+ if(param(direction) & directionRead)
+ {
+ /* open PCM output stream */
+ error = csl_pcm_open_output(cslDriver,
+ "artsd output",
+ _samplingRate,
+ _channels,
+ fmt, &inputStream);
+ if (error)
+ {
+ errorMsg = "failed to open CSL input stream: ";
+ errorMsg += csl_strerror(error);
+ return false;
+ }
+ csl_pcm_set_callback(inputStream, handleRead, 0, 0);
+ }
+ if(param(direction) & directionWrite)
+ {
+ /* open PCM output stream */
+ error = csl_pcm_open_output(cslDriver,
+ "artsd output",
+ _samplingRate,
+ _channels,
+ fmt, &outputStream);
+ if (error)
+ {
+ close();
+
+ errorMsg = "failed to open CSL output stream: ";
+ errorMsg += csl_strerror(error);
+ return false;
+ }
+ csl_pcm_set_callback(outputStream, handleWrite, 0, 0);
+ }
+#if 0
+ if (_format && (ossBits(gotFormat) != ossBits(requestedFormat)))
+ {
+ char details[80];
+ sprintf(details," (_format = %d, asked driver to give %d, got %d)",
+ _format, requestedFormat, gotFormat);
+
+ _error = "Can't set playback format";
+ _error += details;
+
+ close();
+ return false;
+ }
+
+ if(gotFormat == AFMT_U8)
+ _format = 8;
+ else if(gotFormat == AFMT_S16_LE)
+ _format = 16;
+ else if(gotFormat == AFMT_S16_BE)
+ _format = 17;
+ else
+ {
+ char details[80];
+ sprintf(details," (_format = %d, asked driver to give %d, got %d)",
+ _format, requestedFormat, gotFormat);
+
+ _error = "unknown format given by driver";
+ _error += details;
+
+ close();
+ return false;
+ }
+
+
+ int stereo=-1; /* 0=mono, 1=stereo */
+
+ if(_channels == 1)
+ {
+ stereo = 0;
+ }
+ if(_channels == 2)
+ {
+ stereo = 1;
+ }
+
+ if(stereo == -1)
+ {
+ _error = "internal error; set channels to 1 (mono) or 2 (stereo)";
+
+ close();
+ return false;
+ }
+
+ int requeststereo = stereo;
+
+ if (ioctl(audio_fd, SNDCTL_DSP_STEREO, &stereo)==-1)
+ {
+ _error = "SNDCTL_DSP_STEREO failed - ";
+ _error += strerror(errno);
+
+ close();
+ return false;
+ }
+
+ if (requeststereo != stereo)
+ {
+ _error = "audio device doesn't support number of requested channels";
+
+ close();
+ return false;
+ }
+
+ int speed = _samplingRate;
+
+ if (ioctl(audio_fd, SNDCTL_DSP_SPEED, &speed)==-1)
+ {
+ _error = "SNDCTL_DSP_SPEED failed - ";
+ _error += strerror(errno);
+
+ close();
+ return false;
+ }
+
+ /*
+ * Some soundcards seem to be able to only supply "nearly" the requested
+ * sampling rate, especially PAS 16 cards seem to quite radical supplying
+ * something different than the requested sampling rate ;)
+ *
+ * So we have a quite large tolerance here (when requesting 44100 Hz, it
+ * will accept anything between 38690 Hz and 49510 Hz). Most parts of the
+ * aRts code will do resampling where appropriate, so it shouldn't affect
+ * sound quality.
+ */
+ int tolerance = _samplingRate/10+1000;
+
+ if (abs(speed-_samplingRate) > tolerance)
+ {
+ _error = "can't set requested samplingrate";
+
+ char details[80];
+ sprintf(details," (requested rate %d, got rate %d)",
+ _samplingRate, speed);
+ _error += details;
+
+ close();
+ return false;
+ }
+ _samplingRate = speed;
+
+ /*
+ * set the fragment settings to what the user requested
+ */
+
+ _fragmentSize = requestedFragmentSize;
+ _fragmentCount = requestedFragmentCount;
+
+ /*
+ * lower 16 bits are the fragment size (as 2^S)
+ * higher 16 bits are the number of fragments
+ */
+ int frag_arg = 0;
+
+ int size = _fragmentSize;
+ while(size > 1) { size /= 2; frag_arg++; }
+ frag_arg += (_fragmentCount << 16);
+ if(ioctl(audio_fd, SNDCTL_DSP_SETFRAGMENT, &frag_arg) == -1)
+ {
+ char buffer[1024];
+ _error = "can't set requested fragments settings";
+ sprintf(buffer,"size%d:count%d\n",_fragmentSize,_fragmentCount);
+ close();
+ return false;
+ }
+
+ /*
+ * now see what we really got as cards aren't required to supply what
+ * we asked for
+ */
+ audio_buf_info info;
+ if(ioctl(audio_fd,SNDCTL_DSP_GETOSPACE, &info) == -1)
+ {
+ _error = "can't retrieve fragment settings";
+ close();
+ return false;
+ }
+
+ // update fragment settings with what we got
+ _fragmentSize = info.fragsize;
+ _fragmentCount = info.fragstotal;
+
+ 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);
+
+ /*
+ * Workaround for broken kernel drivers: usually filling up the audio
+ * buffer is _only_ required if _fullDuplex is true. However, there
+ * are kernel drivers around (especially everything related to ES1370/1371)
+ * which will not trigger select()ing the file descriptor unless we have
+ * written something first.
+ */
+ char *zbuffer = (char *)calloc(sizeof(char), _fragmentSize);
+ if(_format == 8)
+ for(int zpos = 0; zpos < _fragmentSize; zpos++)
+ zbuffer[zpos] |= 0x80;
+
+ for(int fill = 0; fill < _fragmentCount; fill++)
+ {
+ int len = ::write(audio_fd,zbuffer,_fragmentSize);
+ if(len != _fragmentSize)
+ {
+ arts_debug("AudioIOCSL: failed prefilling audio buffer (might cause synchronization problems in conjunction with full duplex)");
+ fill = _fragmentCount+1;
+ }
+ }
+ free(zbuffer);
+
+ /*
+ * Triggering - the original aRts code did this for full duplex:
+ *
+ * - stop audio i/o using SETTRIGGER(~(PCM_ENABLE_INPUT|PCM_ENABLE_OUTPUT))
+ * - fill buffer (see zbuffer code two lines above)
+ * - start audio i/o using SETTRIGGER(PCM_ENABLE_INPUT|PCM_ENABLE_OUTPUT)
+ *
+ * this should guarantee synchronous start of input/output. Today, it
+ * seems there are too many broken drivers around for this.
+ */
+
+ if(device_caps & DSP_CAP_TRIGGER)
+ {
+ int enable_bits = 0;
+
+ if(param(direction) & 1) enable_bits |= PCM_ENABLE_INPUT;
+ if(param(direction) & 2) enable_bits |= PCM_ENABLE_OUTPUT;
+
+ if(ioctl(audio_fd,SNDCTL_DSP_SETTRIGGER, &enable_bits) == -1)
+ {
+ _error = "can't start sound i/o";
+
+ close();
+ return false;
+ }
+ }
+#endif
+ updateFds();
+ return true;
+}
+
+void AudioIOCSL::close()
+{
+ if(inputStream)
+ {
+ csl_pcm_close(inputStream);
+ inputStream = 0;
+ }
+ if(outputStream)
+ {
+ csl_pcm_close(outputStream);
+ outputStream = 0;
+ }
+ updateFds();
+}
+
+void AudioIOCSL::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 AudioIOCSL::getParam(AudioParam p)
+{
+ CslErrorType error;
+ CslPcmStatus status;
+
+ switch(p)
+ {
+ case canRead:
+ error = csl_pcm_get_status (inputStream, &status);
+ if (error) /* FIXME */
+ arts_fatal("unable to obtain csl stream status: %s",
+ csl_strerror (error));
+
+ updateFds();
+ return status.n_bytes_available;
+ break;
+
+ case canWrite:
+ error = csl_pcm_get_status(outputStream, &status);
+ if (error) /* FIXME */
+ arts_fatal("unable to obtain csl stream status: %s",
+ csl_strerror (error));
+
+ updateFds();
+ return status.n_bytes_available;
+ break;
+
+ case autoDetect:
+ /* CSL is pretty experimental currently */
+ return 1;
+ break;
+
+ default:
+ return param(p);
+ break;
+ }
+}
+
+int AudioIOCSL::read(void *buffer, int size)
+{
+ arts_assert(inputStream != 0);
+
+ int result = csl_pcm_read(inputStream, size, buffer);
+ updateFds();
+
+ return result;
+}
+
+void AudioIOCSL::handleRead(void *, CslPcmStream *)
+{
+ AudioSubSystem::the()->handleIO(AudioSubSystem::ioRead);
+}
+
+int AudioIOCSL::write(void *buffer, int size)
+{
+ arts_assert(outputStream != 0);
+
+ int result = csl_pcm_write(outputStream, size, buffer);
+ updateFds();
+
+ return result;
+}
+
+void AudioIOCSL::handleWrite(void *, CslPcmStream *)
+{
+ AudioSubSystem::the()->handleIO(AudioSubSystem::ioWrite);
+}
+
+/* mainloop integration: make CSL callbacks work inside the aRts mainloop */
+
+int AudioIOCSL::csl2iomanager(int cslTypes)
+{
+ /* FIXME: doublecheck this list */
+ int types = 0;
+
+ if(cslTypes & CSL_POLLIN)
+ types |= IOType::read;
+ if(cslTypes & CSL_POLLOUT)
+ types |= IOType::write;
+ if(cslTypes & CSL_POLLERR)
+ types |= IOType::except;
+
+ return types;
+}
+
+void AudioIOCSL::updateFds()
+{
+ unsigned int n_fds = csl_poll_count_fds(cslDriver);
+ CslPollFD *newFds = g_newa(CslPollFD, n_fds);
+
+ unsigned int have_fds = csl_poll_get_fds(cslDriver, n_fds, newFds);
+ arts_assert(have_fds == n_fds);
+
+ cslFds.clear();
+
+ unsigned int i;
+ for(i = 0; i < have_fds; i++)
+ cslFds.push_back(newFds[i]);
+
+ /* FIXME: if csl provided a flag for this, we could save some work here */
+ bool fdsChanged;
+ if(cslFds.size() == cslOldFds.size())
+ {
+ fdsChanged = false;
+ for(i = 0; i < have_fds; i++)
+ {
+ if(cslFds[i].events != cslOldFds[i].events)
+ fdsChanged = true;
+ if(cslFds[i].fd != cslOldFds[i].fd)
+ fdsChanged = true;
+ }
+ }
+ else
+ {
+ fdsChanged = true;
+ }
+ if(!fdsChanged)
+ return;
+
+ vector<CslPollFD>::iterator ci;
+
+ /* remove old watches */
+ /*
+ * UGLY! due to broken API, we can only remove all watches here, and not
+ * do anything selectively - its not a problem for the code here, but it
+ * might be a problem elsewhere. Unfortunately, it can't be fixed without
+ * breaking BC.
+ */
+ Dispatcher::the()->ioManager()->remove(this, IOType::all);
+ arts_debug("AudioIOCSL::updateFds(): removing watches");
+
+ /* add new watches */
+ for(ci = cslFds.begin(); ci < cslFds.end(); ci++)
+ {
+ int types = csl2iomanager(ci->events);
+ if(types)
+ {
+ Dispatcher::the()->ioManager()->watchFD(ci->fd, types, this);
+ arts_debug("AudioIOCSL::updateFds(): adding watch on %d", ci->fd);
+ }
+ }
+
+ cslOldFds = cslFds;
+}
+
+void AudioIOCSL::notifyIO(int fd, int type)
+{
+ vector<CslPollFD>::iterator fi;
+
+ for(fi = cslFds.begin(); fi != cslFds.end(); fi++)
+ {
+ if(fi->fd == fd)
+ {
+ int ftype = csl2iomanager(fi->events);
+ fi->revents = 0;
+
+ if(type & ftype & IOType::read)
+ fi->revents |= CSL_POLLIN;
+ if(type & ftype & IOType::write)
+ fi->revents |= CSL_POLLOUT;
+ if(type & ftype & IOType::except)
+ fi->revents |= CSL_POLLERR;
+
+ if(fi->revents)
+ csl_poll_handle_fds(cslDriver, 1, &(*fi));
+ }
+ }
+ updateFds();
+}
+
+#endif
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