🛠️🐜 Antkeeper superbuild with dependencies included
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303 lines
8.2 KiB
303 lines
8.2 KiB
/**
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* OpenAL cross platform audio library
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* Copyright (C) 1999-2007 by authors.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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* Or go to http://www.gnu.org/copyleft/lgpl.html
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*/
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#include "config.h"
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#include "solaris.h"
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <memory.h>
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#include <unistd.h>
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#include <errno.h>
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#include <poll.h>
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#include <math.h>
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#include <string.h>
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#include <thread>
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#include <functional>
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#include "albyte.h"
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#include "alc/alconfig.h"
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#include "core/device.h"
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#include "core/helpers.h"
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#include "core/logging.h"
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#include "threads.h"
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#include "vector.h"
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#include <sys/audioio.h>
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namespace {
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constexpr char solaris_device[] = "Solaris Default";
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std::string solaris_driver{"/dev/audio"};
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struct SolarisBackend final : public BackendBase {
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SolarisBackend(DeviceBase *device) noexcept : BackendBase{device} { }
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~SolarisBackend() override;
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int mixerProc();
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void open(const char *name) override;
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bool reset() override;
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void start() override;
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void stop() override;
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int mFd{-1};
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uint mFrameStep{};
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al::vector<al::byte> mBuffer;
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std::atomic<bool> mKillNow{true};
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std::thread mThread;
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DEF_NEWDEL(SolarisBackend)
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};
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SolarisBackend::~SolarisBackend()
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{
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if(mFd != -1)
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close(mFd);
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mFd = -1;
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}
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int SolarisBackend::mixerProc()
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{
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SetRTPriority();
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althrd_setname(MIXER_THREAD_NAME);
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const size_t frame_step{mDevice->channelsFromFmt()};
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const uint frame_size{mDevice->frameSizeFromFmt()};
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while(!mKillNow.load(std::memory_order_acquire)
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&& mDevice->Connected.load(std::memory_order_acquire))
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{
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pollfd pollitem{};
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pollitem.fd = mFd;
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pollitem.events = POLLOUT;
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int pret{poll(&pollitem, 1, 1000)};
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if(pret < 0)
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{
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if(errno == EINTR || errno == EAGAIN)
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continue;
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ERR("poll failed: %s\n", strerror(errno));
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mDevice->handleDisconnect("Failed to wait for playback buffer: %s", strerror(errno));
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break;
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}
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else if(pret == 0)
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{
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WARN("poll timeout\n");
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continue;
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}
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al::byte *write_ptr{mBuffer.data()};
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size_t to_write{mBuffer.size()};
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mDevice->renderSamples(write_ptr, static_cast<uint>(to_write/frame_size), frame_step);
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while(to_write > 0 && !mKillNow.load(std::memory_order_acquire))
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{
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ssize_t wrote{write(mFd, write_ptr, to_write)};
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if(wrote < 0)
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{
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if(errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
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continue;
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ERR("write failed: %s\n", strerror(errno));
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mDevice->handleDisconnect("Failed to write playback samples: %s", strerror(errno));
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break;
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}
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to_write -= static_cast<size_t>(wrote);
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write_ptr += wrote;
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}
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}
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return 0;
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}
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void SolarisBackend::open(const char *name)
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{
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if(!name)
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name = solaris_device;
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else if(strcmp(name, solaris_device) != 0)
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throw al::backend_exception{al::backend_error::NoDevice, "Device name \"%s\" not found",
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name};
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int fd{::open(solaris_driver.c_str(), O_WRONLY)};
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if(fd == -1)
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throw al::backend_exception{al::backend_error::NoDevice, "Could not open %s: %s",
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solaris_driver.c_str(), strerror(errno)};
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if(mFd != -1)
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::close(mFd);
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mFd = fd;
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mDevice->DeviceName = name;
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}
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bool SolarisBackend::reset()
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{
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audio_info_t info;
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AUDIO_INITINFO(&info);
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info.play.sample_rate = mDevice->Frequency;
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info.play.channels = mDevice->channelsFromFmt();
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switch(mDevice->FmtType)
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{
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case DevFmtByte:
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info.play.precision = 8;
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info.play.encoding = AUDIO_ENCODING_LINEAR;
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break;
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case DevFmtUByte:
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info.play.precision = 8;
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info.play.encoding = AUDIO_ENCODING_LINEAR8;
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break;
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case DevFmtUShort:
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case DevFmtInt:
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case DevFmtUInt:
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case DevFmtFloat:
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mDevice->FmtType = DevFmtShort;
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/* fall-through */
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case DevFmtShort:
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info.play.precision = 16;
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info.play.encoding = AUDIO_ENCODING_LINEAR;
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break;
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}
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info.play.buffer_size = mDevice->BufferSize * mDevice->frameSizeFromFmt();
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if(ioctl(mFd, AUDIO_SETINFO, &info) < 0)
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{
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ERR("ioctl failed: %s\n", strerror(errno));
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return false;
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}
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if(mDevice->channelsFromFmt() != info.play.channels)
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{
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if(info.play.channels >= 2)
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mDevice->FmtChans = DevFmtStereo;
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else if(info.play.channels == 1)
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mDevice->FmtChans = DevFmtMono;
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else
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throw al::backend_exception{al::backend_error::DeviceError,
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"Got %u device channels", info.play.channels};
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}
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if(info.play.precision == 8 && info.play.encoding == AUDIO_ENCODING_LINEAR8)
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mDevice->FmtType = DevFmtUByte;
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else if(info.play.precision == 8 && info.play.encoding == AUDIO_ENCODING_LINEAR)
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mDevice->FmtType = DevFmtByte;
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else if(info.play.precision == 16 && info.play.encoding == AUDIO_ENCODING_LINEAR)
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mDevice->FmtType = DevFmtShort;
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else if(info.play.precision == 32 && info.play.encoding == AUDIO_ENCODING_LINEAR)
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mDevice->FmtType = DevFmtInt;
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else
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{
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ERR("Got unhandled sample type: %d (0x%x)\n", info.play.precision, info.play.encoding);
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return false;
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}
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uint frame_size{mDevice->bytesFromFmt() * info.play.channels};
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mFrameStep = info.play.channels;
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mDevice->Frequency = info.play.sample_rate;
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mDevice->BufferSize = info.play.buffer_size / frame_size;
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/* How to get the actual period size/count? */
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mDevice->UpdateSize = mDevice->BufferSize / 2;
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setDefaultChannelOrder();
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mBuffer.resize(mDevice->UpdateSize * size_t{frame_size});
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std::fill(mBuffer.begin(), mBuffer.end(), al::byte{});
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return true;
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}
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void SolarisBackend::start()
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{
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try {
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mKillNow.store(false, std::memory_order_release);
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mThread = std::thread{std::mem_fn(&SolarisBackend::mixerProc), this};
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}
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catch(std::exception& e) {
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throw al::backend_exception{al::backend_error::DeviceError,
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"Failed to start mixing thread: %s", e.what()};
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}
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}
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void SolarisBackend::stop()
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{
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if(mKillNow.exchange(true, std::memory_order_acq_rel) || !mThread.joinable())
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return;
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mThread.join();
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if(ioctl(mFd, AUDIO_DRAIN) < 0)
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ERR("Error draining device: %s\n", strerror(errno));
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}
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} // namespace
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BackendFactory &SolarisBackendFactory::getFactory()
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{
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static SolarisBackendFactory factory{};
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return factory;
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}
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bool SolarisBackendFactory::init()
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{
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if(auto devopt = ConfigValueStr(nullptr, "solaris", "device"))
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solaris_driver = std::move(*devopt);
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return true;
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}
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bool SolarisBackendFactory::querySupport(BackendType type)
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{ return type == BackendType::Playback; }
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std::string SolarisBackendFactory::probe(BackendType type)
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{
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std::string outnames;
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switch(type)
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{
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case BackendType::Playback:
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{
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struct stat buf;
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if(stat(solaris_driver.c_str(), &buf) == 0)
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outnames.append(solaris_device, sizeof(solaris_device));
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}
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break;
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case BackendType::Capture:
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break;
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}
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return outnames;
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}
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BackendPtr SolarisBackendFactory::createBackend(DeviceBase *device, BackendType type)
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{
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if(type == BackendType::Playback)
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return BackendPtr{new SolarisBackend{device}};
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return nullptr;
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}
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