/* * * Copyright (C) 2009 Christian Gmeiner * * This program 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 program 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 General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #include #include // for close #include "dxr3audio-oss.h" #include "dxr3interface.h" static const char *DEV_DXR3_OSS = "_ma"; void cAudioOss::openDevice() { if (open) return; fd = cDxr3Interface::Dxr3Open(DEV_DXR3_OSS, O_RDWR | O_NONBLOCK); if (!fd) { esyslog("[dxr3-audio-oss] failed to open dxr3 audio subdevice"); exit(1); } if (cDxr3ConfigData::Instance().GetUseDigitalOut()) { dsyslog("[dxr3-audio-oss] audio mode: digital"); setAudioMode(DigitalPcm); } else { dsyslog("[dxr3-audio-oss] audio mode: analog"); setAudioMode(Analog); } open = true; } void cAudioOss::releaseDevice() { if (!open) return; close(fd); open = false; } void cAudioOss::setup(const SampleContext& ctx) { // set sample rate if (curContext.samplerate != ctx.samplerate) { dsyslog("[dxr3-audio-oss] changing samplerate to %d (old %d) ", ctx.samplerate, curContext.samplerate); curContext.samplerate = ctx.samplerate; CHECK( ioctl(fd, SNDCTL_DSP_SAMPLESIZE, &ctx.samplerate)); } // set channels if (curContext.channels != ctx.channels) { dsyslog("[dxr3-audio-oss] changing num of channels to %d (old %d)", ctx.channels, curContext.channels); curContext.channels = ctx.channels; CHECK( ioctl(fd, SNDCTL_DSP_CHANNELS, &ctx.channels)); } } void cAudioOss::write(uchar* data, size_t size) { size_t ret = WriteAllOrNothing(fd, data, size, 1000, 10); if (ret != size) { dsyslog("[dxr3-audio-oss] writing audio failed"); } } void cAudioOss::setAudioMode(AudioMode mode) { uint32_t ioval = 0; switch (mode) { case Analog: ioval = EM8300_AUDIOMODE_ANALOG; break; case DigitalPcm: ioval = EM8300_AUDIOMODE_DIGITALPCM; break; case Ac3: ioval = EM8300_AUDIOMODE_DIGITALAC3; break; } // we need to do it this way, as we dont have access // to the file handle for the conrtol sub device. if (cDxr3Interface::Instance().OssSetPlayMode(ioval)) { this->mode = mode; } }