🛠️🐜 Antkeeper superbuild with dependencies included
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533 lines
15 KiB
533 lines
15 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 "sndio.h"
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#include <poll.h>
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#include <stdio.h>
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#include <stdlib.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 "alnumeric.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 "ringbuffer.h"
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#include "threads.h"
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#include "vector.h"
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#include <sndio.h>
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namespace {
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static const char sndio_device[] = "SndIO Default";
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struct SioPar : public sio_par {
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SioPar() { sio_initpar(this); }
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void clear() { sio_initpar(this); }
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};
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struct SndioPlayback final : public BackendBase {
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SndioPlayback(DeviceBase *device) noexcept : BackendBase{device} { }
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~SndioPlayback() 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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sio_hdl *mSndHandle{nullptr};
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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(SndioPlayback)
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};
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SndioPlayback::~SndioPlayback()
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{
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if(mSndHandle)
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sio_close(mSndHandle);
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mSndHandle = nullptr;
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}
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int SndioPlayback::mixerProc()
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{
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const size_t frameStep{mFrameStep};
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const size_t frameSize{frameStep * mDevice->bytesFromFmt()};
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SetRTPriority();
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althrd_setname(MIXER_THREAD_NAME);
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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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al::span<al::byte> buffer{mBuffer};
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mDevice->renderSamples(buffer.data(), static_cast<uint>(buffer.size() / frameSize),
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frameStep);
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while(!buffer.empty() && !mKillNow.load(std::memory_order_acquire))
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{
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size_t wrote{sio_write(mSndHandle, buffer.data(), buffer.size())};
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if(wrote == 0)
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{
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ERR("sio_write failed\n");
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mDevice->handleDisconnect("Failed to write playback samples");
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break;
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}
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buffer = buffer.subspan(wrote);
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}
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}
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return 0;
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}
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void SndioPlayback::open(const char *name)
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{
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if(!name)
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name = sndio_device;
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else if(strcmp(name, sndio_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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sio_hdl *sndHandle{sio_open(nullptr, SIO_PLAY, 0)};
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if(!sndHandle)
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throw al::backend_exception{al::backend_error::NoDevice, "Could not open backend device"};
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if(mSndHandle)
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sio_close(mSndHandle);
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mSndHandle = sndHandle;
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mDevice->DeviceName = name;
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}
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bool SndioPlayback::reset()
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{
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SioPar par;
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auto tryfmt = mDevice->FmtType;
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retry_params:
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switch(tryfmt)
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{
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case DevFmtByte:
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par.bits = 8;
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par.sig = 1;
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break;
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case DevFmtUByte:
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par.bits = 8;
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par.sig = 0;
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break;
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case DevFmtShort:
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par.bits = 16;
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par.sig = 1;
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break;
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case DevFmtUShort:
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par.bits = 16;
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par.sig = 0;
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break;
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case DevFmtFloat:
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case DevFmtInt:
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par.bits = 32;
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par.sig = 1;
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break;
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case DevFmtUInt:
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par.bits = 32;
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par.sig = 0;
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break;
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}
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par.bps = SIO_BPS(par.bits);
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par.le = SIO_LE_NATIVE;
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par.msb = 1;
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par.rate = mDevice->Frequency;
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par.pchan = mDevice->channelsFromFmt();
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par.round = mDevice->UpdateSize;
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par.appbufsz = mDevice->BufferSize - mDevice->UpdateSize;
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if(!par.appbufsz) par.appbufsz = mDevice->UpdateSize;
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try {
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if(!sio_setpar(mSndHandle, &par))
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throw al::backend_exception{al::backend_error::DeviceError,
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"Failed to set device parameters"};
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par.clear();
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if(!sio_getpar(mSndHandle, &par))
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throw al::backend_exception{al::backend_error::DeviceError,
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"Failed to get device parameters"};
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if(par.bps > 1 && par.le != SIO_LE_NATIVE)
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throw al::backend_exception{al::backend_error::DeviceError,
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"%s-endian samples not supported", par.le ? "Little" : "Big"};
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if(par.bits < par.bps*8 && !par.msb)
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throw al::backend_exception{al::backend_error::DeviceError,
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"MSB-padded samples not supported (%u of %u bits)", par.bits, par.bps*8};
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if(par.pchan < 1)
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throw al::backend_exception{al::backend_error::DeviceError,
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"No playback channels on device"};
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}
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catch(al::backend_exception &e) {
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if(tryfmt == DevFmtShort)
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throw;
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par.clear();
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tryfmt = DevFmtShort;
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goto retry_params;
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}
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if(par.bps == 1)
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mDevice->FmtType = (par.sig==1) ? DevFmtByte : DevFmtUByte;
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else if(par.bps == 2)
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mDevice->FmtType = (par.sig==1) ? DevFmtShort : DevFmtUShort;
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else if(par.bps == 4)
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mDevice->FmtType = (par.sig==1) ? DevFmtInt : DevFmtUInt;
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else
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throw al::backend_exception{al::backend_error::DeviceError,
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"Unhandled sample format: %s %u-bit", (par.sig?"signed":"unsigned"), par.bps*8};
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mFrameStep = par.pchan;
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if(par.pchan != mDevice->channelsFromFmt())
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{
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WARN("Got %u channel%s for %s\n", par.pchan, (par.pchan==1)?"":"s",
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DevFmtChannelsString(mDevice->FmtChans));
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if(par.pchan < 2) mDevice->FmtChans = DevFmtMono;
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else mDevice->FmtChans = DevFmtStereo;
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}
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mDevice->Frequency = par.rate;
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setDefaultChannelOrder();
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mDevice->UpdateSize = par.round;
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mDevice->BufferSize = par.bufsz + par.round;
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mBuffer.resize(mDevice->UpdateSize * par.pchan*par.bps);
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if(par.sig == 1)
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std::fill(mBuffer.begin(), mBuffer.end(), al::byte{});
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else if(par.bits == 8)
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std::fill_n(mBuffer.data(), mBuffer.size(), al::byte(0x80));
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else if(par.bits == 16)
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std::fill_n(reinterpret_cast<uint16_t*>(mBuffer.data()), mBuffer.size()/2, 0x8000);
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else if(par.bits == 32)
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std::fill_n(reinterpret_cast<uint32_t*>(mBuffer.data()), mBuffer.size()/4, 0x80000000u);
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return true;
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}
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void SndioPlayback::start()
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{
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if(!sio_start(mSndHandle))
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throw al::backend_exception{al::backend_error::DeviceError, "Error starting playback"};
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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(&SndioPlayback::mixerProc), this};
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}
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catch(std::exception& e) {
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sio_stop(mSndHandle);
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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 SndioPlayback::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(!sio_stop(mSndHandle))
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ERR("Error stopping device\n");
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}
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/* TODO: This could be improved by avoiding the ring buffer and record thread,
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* counting the available samples with the sio_onmove callback and reading
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* directly from the device. However, this depends on reasonable support for
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* capture buffer sizes apps may request.
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*/
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struct SndioCapture final : public BackendBase {
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SndioCapture(DeviceBase *device) noexcept : BackendBase{device} { }
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~SndioCapture() override;
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int recordProc();
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void open(const char *name) override;
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void start() override;
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void stop() override;
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void captureSamples(al::byte *buffer, uint samples) override;
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uint availableSamples() override;
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sio_hdl *mSndHandle{nullptr};
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RingBufferPtr mRing;
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std::atomic<bool> mKillNow{true};
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std::thread mThread;
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DEF_NEWDEL(SndioCapture)
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};
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SndioCapture::~SndioCapture()
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{
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if(mSndHandle)
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sio_close(mSndHandle);
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mSndHandle = nullptr;
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}
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int SndioCapture::recordProc()
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{
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SetRTPriority();
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althrd_setname(RECORD_THREAD_NAME);
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const uint frameSize{mDevice->frameSizeFromFmt()};
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int nfds_pre{sio_nfds(mSndHandle)};
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if(nfds_pre <= 0)
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{
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mDevice->handleDisconnect("Incorrect return value from sio_nfds(): %d", nfds_pre);
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return 1;
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}
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auto fds = std::make_unique<pollfd[]>(static_cast<uint>(nfds_pre));
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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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/* Wait until there's some samples to read. */
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const int nfds{sio_pollfd(mSndHandle, fds.get(), POLLIN)};
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if(nfds <= 0)
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{
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mDevice->handleDisconnect("Failed to get polling fds: %d", nfds);
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break;
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}
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int pollres{::poll(fds.get(), static_cast<uint>(nfds), 2000)};
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if(pollres < 0)
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{
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if(errno == EINTR) continue;
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mDevice->handleDisconnect("Poll error: %s", strerror(errno));
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break;
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}
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if(pollres == 0)
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continue;
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const int revents{sio_revents(mSndHandle, fds.get())};
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if((revents&POLLHUP))
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{
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mDevice->handleDisconnect("Got POLLHUP from poll events");
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break;
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}
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if(!(revents&POLLIN))
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continue;
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auto data = mRing->getWriteVector();
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al::span<al::byte> buffer{data.first.buf, data.first.len*frameSize};
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while(!buffer.empty())
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{
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size_t got{sio_read(mSndHandle, buffer.data(), buffer.size())};
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if(got == 0) break;
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mRing->writeAdvance(got / frameSize);
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buffer = buffer.subspan(got);
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if(buffer.empty())
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{
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data = mRing->getWriteVector();
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buffer = {data.first.buf, data.first.len*frameSize};
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}
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}
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if(buffer.empty())
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{
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/* Got samples to read, but no place to store it. Drop it. */
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static char junk[4096];
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sio_read(mSndHandle, junk, sizeof(junk) - (sizeof(junk)%frameSize));
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}
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}
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return 0;
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}
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void SndioCapture::open(const char *name)
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{
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if(!name)
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name = sndio_device;
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else if(strcmp(name, sndio_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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mSndHandle = sio_open(nullptr, SIO_REC, true);
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if(mSndHandle == nullptr)
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throw al::backend_exception{al::backend_error::NoDevice, "Could not open backend device"};
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SioPar par;
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switch(mDevice->FmtType)
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{
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case DevFmtByte:
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par.bits = 8;
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par.sig = 1;
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break;
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case DevFmtUByte:
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par.bits = 8;
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par.sig = 0;
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break;
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case DevFmtShort:
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par.bits = 16;
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par.sig = 1;
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break;
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case DevFmtUShort:
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par.bits = 16;
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par.sig = 0;
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break;
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case DevFmtInt:
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par.bits = 32;
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par.sig = 1;
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break;
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case DevFmtUInt:
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par.bits = 32;
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par.sig = 0;
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break;
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case DevFmtFloat:
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throw al::backend_exception{al::backend_error::DeviceError,
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"%s capture samples not supported", DevFmtTypeString(mDevice->FmtType)};
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}
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par.bps = SIO_BPS(par.bits);
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par.le = SIO_LE_NATIVE;
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par.msb = 1;
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par.rchan = mDevice->channelsFromFmt();
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par.rate = mDevice->Frequency;
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par.appbufsz = maxu(mDevice->BufferSize, mDevice->Frequency/10);
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par.round = minu(par.appbufsz/2, mDevice->Frequency/40);
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if(!sio_setpar(mSndHandle, &par) || !sio_getpar(mSndHandle, &par))
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throw al::backend_exception{al::backend_error::DeviceError,
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"Failed to set device praameters"};
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if(par.bps > 1 && par.le != SIO_LE_NATIVE)
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throw al::backend_exception{al::backend_error::DeviceError,
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"%s-endian samples not supported", par.le ? "Little" : "Big"};
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if(par.bits < par.bps*8 && !par.msb)
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throw al::backend_exception{al::backend_error::DeviceError,
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"Padded samples not supported (got %u of %u bits)", par.bits, par.bps*8};
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auto match_fmt = [](DevFmtType fmttype, const sio_par &p) -> bool
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{
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return (fmttype == DevFmtByte && p.bps == 1 && p.sig != 0)
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|| (fmttype == DevFmtUByte && p.bps == 1 && p.sig == 0)
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|| (fmttype == DevFmtShort && p.bps == 2 && p.sig != 0)
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|| (fmttype == DevFmtUShort && p.bps == 2 && p.sig == 0)
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|| (fmttype == DevFmtInt && p.bps == 4 && p.sig != 0)
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|| (fmttype == DevFmtUInt && p.bps == 4 && p.sig == 0);
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};
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if(!match_fmt(mDevice->FmtType, par) || mDevice->channelsFromFmt() != par.rchan
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|| mDevice->Frequency != par.rate)
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throw al::backend_exception{al::backend_error::DeviceError,
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"Failed to set format %s %s %uhz, got %c%u %u-channel %uhz instead",
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DevFmtTypeString(mDevice->FmtType), DevFmtChannelsString(mDevice->FmtChans),
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mDevice->Frequency, par.sig?'s':'u', par.bps*8, par.rchan, par.rate};
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mRing = RingBuffer::Create(mDevice->BufferSize, par.bps*par.rchan, false);
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mDevice->BufferSize = static_cast<uint>(mRing->writeSpace());
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mDevice->UpdateSize = par.round;
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setDefaultChannelOrder();
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mDevice->DeviceName = name;
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}
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void SndioCapture::start()
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{
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if(!sio_start(mSndHandle))
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throw al::backend_exception{al::backend_error::DeviceError, "Error starting capture"};
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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(&SndioCapture::recordProc), this};
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}
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catch(std::exception& e) {
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sio_stop(mSndHandle);
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throw al::backend_exception{al::backend_error::DeviceError,
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"Failed to start capture thread: %s", e.what()};
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}
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}
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void SndioCapture::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(!sio_stop(mSndHandle))
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ERR("Error stopping device\n");
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}
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void SndioCapture::captureSamples(al::byte *buffer, uint samples)
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{ mRing->read(buffer, samples); }
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uint SndioCapture::availableSamples()
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{ return static_cast<uint>(mRing->readSpace()); }
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} // namespace
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BackendFactory &SndIOBackendFactory::getFactory()
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{
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static SndIOBackendFactory factory{};
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return factory;
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}
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bool SndIOBackendFactory::init()
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{ return true; }
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bool SndIOBackendFactory::querySupport(BackendType type)
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{ return (type == BackendType::Playback || type == BackendType::Capture); }
|
|
|
|
std::string SndIOBackendFactory::probe(BackendType type)
|
|
{
|
|
std::string outnames;
|
|
switch(type)
|
|
{
|
|
case BackendType::Playback:
|
|
case BackendType::Capture:
|
|
/* Includes null char. */
|
|
outnames.append(sndio_device, sizeof(sndio_device));
|
|
break;
|
|
}
|
|
return outnames;
|
|
}
|
|
|
|
BackendPtr SndIOBackendFactory::createBackend(DeviceBase *device, BackendType type)
|
|
{
|
|
if(type == BackendType::Playback)
|
|
return BackendPtr{new SndioPlayback{device}};
|
|
if(type == BackendType::Capture)
|
|
return BackendPtr{new SndioCapture{device}};
|
|
return nullptr;
|
|
}
|