/* * * Copyright (C) 2009 Christian Gmeiner * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * */ #include #include // for close #include #include "dxr3audio-oss.h" #include "dxr3device.h" #include "settings.h" static const char *DEV_DXR3_OSS = "_ma"; void cAudioOss::openDevice() { if (open) return; fd = cDxr3Device::Dxr3Open(DEV_DXR3_OSS, O_RDWR | O_NONBLOCK); if (!fd) { esyslog("[dxr3-audio-oss] failed to open dxr3 audio subdevice"); exit(1); } open = true; } void cAudioOss::releaseDevice() { if (!open) return; close(fd); open = false; } void cAudioOss::setup(int channels, int samplerate) { if (!open) return; // set sample rate if (curContext.samplerate != samplerate) { dsyslog("[dxr3-audio-oss] changing samplerate to %d (old %d) ", samplerate, curContext.samplerate); curContext.samplerate = samplerate; CHECK( ioctl(fd, SNDCTL_DSP_SAMPLESIZE, &samplerate)); } // set channels if (curContext.channels != channels) { dsyslog("[dxr3-audio-oss] changing num of channels to %d (old %d)", channels, curContext.channels); curContext.channels = channels; CHECK( ioctl(fd, SNDCTL_DSP_CHANNELS, &channels)); } } void cAudioOss::write(uchar* data, size_t size) { if (!open || !enabled) return; size_t ret = WriteAllOrNothing(fd, data, size, 1000, 10); if (ret != size) { dsyslog("[dxr3-audio-oss] writing audio failed"); } } void cAudioOss::poll(cPoller &poller) { poller.Add(fd, true); } void cAudioOss::setDigitalAudio(bool on) { if (digitalAudio == on) return; reconfigure(); digitalAudio = on; } void cAudioOss::reconfigure() { uint32_t ioval = 0; dsyslog("[dxr3-oss] reconfigure"); // this is quite an imporant part, as we need to // decide how we set the audiomode of oss device. if (digitalAudio) { ioval = EM8300_AUDIOMODE_DIGITALAC3; } else { // digital or analog pcm? if (cSettings::instance()->useDigitalOut()) { ioval = EM8300_AUDIOMODE_DIGITALPCM; } else { ioval = EM8300_AUDIOMODE_ANALOG; } } // we need to do it this way, as we dont have access // to the file handle for the conrtol sub device. cDxr3Device::instance()->ossSetPlayMode(ioval); }