/** * OpenAL cross platform audio library * Copyright (C) 1999-2007 by authors. * 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; if not, write to the * Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * Or go to http://www.gnu.org/copyleft/lgpl.html */ #include "config.h" #include "backends/solaris.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "alcmain.h" #include "alu.h" #include "alconfig.h" #include "threads.h" #include "vector.h" #include "compat.h" #include namespace { constexpr ALCchar solaris_device[] = "Solaris Default"; std::string solaris_driver{"/dev/audio"}; struct SolarisBackend final : public BackendBase { SolarisBackend(ALCdevice *device) noexcept : BackendBase{device} { } ~SolarisBackend() override; int mixerProc(); ALCenum open(const ALCchar *name) override; ALCboolean reset() override; ALCboolean start() override; void stop() override; int mFd{-1}; al::vector mBuffer; std::atomic mKillNow{true}; std::thread mThread; DEF_NEWDEL(SolarisBackend) }; SolarisBackend::~SolarisBackend() { if(mFd != -1) close(mFd); mFd = -1; } int SolarisBackend::mixerProc() { SetRTPriority(); althrd_setname(MIXER_THREAD_NAME); const ALuint frame_size{mDevice->frameSizeFromFmt()}; lock(); while(!mKillNow.load(std::memory_order_acquire) && mDevice->Connected.load(std::memory_order_acquire)) { pollfd pollitem{}; pollitem.fd = mFd; pollitem.events = POLLOUT; unlock(); int pret{poll(&pollitem, 1, 1000)}; lock(); if(pret < 0) { if(errno == EINTR || errno == EAGAIN) continue; ERR("poll failed: %s\n", strerror(errno)); aluHandleDisconnect(mDevice, "Failed to wait for playback buffer: %s", strerror(errno)); break; } else if(pret == 0) { WARN("poll timeout\n"); continue; } ALubyte *write_ptr{mBuffer.data()}; size_t to_write{mBuffer.size()}; aluMixData(mDevice, write_ptr, to_write/frame_size); while(to_write > 0 && !mKillNow.load(std::memory_order_acquire)) { ssize_t wrote{write(mFd, write_ptr, to_write)}; if(wrote < 0) { if(errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) continue; ERR("write failed: %s\n", strerror(errno)); aluHandleDisconnect(mDevice, "Failed to write playback samples: %s", strerror(errno)); break; } to_write -= wrote; write_ptr += wrote; } } unlock(); return 0; } ALCenum SolarisBackend::open(const ALCchar *name) { if(!name) name = solaris_device; else if(strcmp(name, solaris_device) != 0) return ALC_INVALID_VALUE; mFd = ::open(solaris_driver.c_str(), O_WRONLY); if(mFd == -1) { ERR("Could not open %s: %s\n", solaris_driver.c_str(), strerror(errno)); return ALC_INVALID_VALUE; } mDevice->DeviceName = name; return ALC_NO_ERROR; } ALCboolean SolarisBackend::reset() { audio_info_t info; AUDIO_INITINFO(&info); info.play.sample_rate = mDevice->Frequency; if(mDevice->FmtChans != DevFmtMono) mDevice->FmtChans = DevFmtStereo; ALuint numChannels{mDevice->channelsFromFmt()}; info.play.channels = numChannels; switch(mDevice->FmtType) { case DevFmtByte: info.play.precision = 8; info.play.encoding = AUDIO_ENCODING_LINEAR; break; case DevFmtUByte: info.play.precision = 8; info.play.encoding = AUDIO_ENCODING_LINEAR8; break; case DevFmtUShort: case DevFmtInt: case DevFmtUInt: case DevFmtFloat: mDevice->FmtType = DevFmtShort; /* fall-through */ case DevFmtShort: info.play.precision = 16; info.play.encoding = AUDIO_ENCODING_LINEAR; break; } ALuint frameSize{numChannels * mDevice->bytesFromFmt()}; info.play.buffer_size = mDevice->BufferSize * frameSize; if(ioctl(mFd, AUDIO_SETINFO, &info) < 0) { ERR("ioctl failed: %s\n", strerror(errno)); return ALC_FALSE; } if(mDevice->channelsFromFmt() != info.play.channels) { ERR("Failed to set %s, got %u channels instead\n", DevFmtChannelsString(mDevice->FmtChans), info.play.channels); return ALC_FALSE; } if(!((info.play.precision == 8 && info.play.encoding == AUDIO_ENCODING_LINEAR8 && mDevice->FmtType == DevFmtUByte) || (info.play.precision == 8 && info.play.encoding == AUDIO_ENCODING_LINEAR && mDevice->FmtType == DevFmtByte) || (info.play.precision == 16 && info.play.encoding == AUDIO_ENCODING_LINEAR && mDevice->FmtType == DevFmtShort) || (info.play.precision == 32 && info.play.encoding == AUDIO_ENCODING_LINEAR && mDevice->FmtType == DevFmtInt))) { ERR("Could not set %s samples, got %d (0x%x)\n", DevFmtTypeString(mDevice->FmtType), info.play.precision, info.play.encoding); return ALC_FALSE; } mDevice->Frequency = info.play.sample_rate; mDevice->BufferSize = info.play.buffer_size / frameSize; mDevice->UpdateSize = mDevice->BufferSize / 2; SetDefaultChannelOrder(mDevice); mBuffer.resize(mDevice->UpdateSize * mDevice->frameSizeFromFmt()); std::fill(mBuffer.begin(), mBuffer.end(), 0); return ALC_TRUE; } ALCboolean SolarisBackend::start() { try { mKillNow.store(false, std::memory_order_release); mThread = std::thread{std::mem_fn(&SolarisBackend::mixerProc), this}; return ALC_TRUE; } catch(std::exception& e) { ERR("Could not create playback thread: %s\n", e.what()); } catch(...) { } return ALC_FALSE; } void SolarisBackend::stop() { if(mKillNow.exchange(true, std::memory_order_acq_rel) || !mThread.joinable()) return; mThread.join(); if(ioctl(mFd, AUDIO_DRAIN) < 0) ERR("Error draining device: %s\n", strerror(errno)); } } // namespace BackendFactory &SolarisBackendFactory::getFactory() { static SolarisBackendFactory factory{}; return factory; } bool SolarisBackendFactory::init() { if(auto devopt = ConfigValueStr(nullptr, "solaris", "device")) solaris_driver = std::move(*devopt); return true; } bool SolarisBackendFactory::querySupport(BackendType type) { return type == BackendType::Playback; } void SolarisBackendFactory::probe(DevProbe type, std::string *outnames) { switch(type) { case DevProbe::Playback: { #ifdef HAVE_STAT struct stat buf; if(stat(solaris_driver.c_str(), &buf) == 0) #endif outnames->append(solaris_device, sizeof(solaris_device)); } break; case DevProbe::Capture: break; } } BackendPtr SolarisBackendFactory::createBackend(ALCdevice *device, BackendType type) { if(type == BackendType::Playback) return BackendPtr{new SolarisBackend{device}}; return nullptr; }