334 lines
9.5 KiB
C++
334 lines
9.5 KiB
C++
/**
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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 "backends/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 <thread>
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#include "alMain.h"
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#include "alu.h"
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#include "alconfig.h"
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#include "threads.h"
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#include "compat.h"
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#include <sys/audioio.h>
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struct ALCsolarisBackend final : public ALCbackend {
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int mFd{-1};
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ALubyte *mMixData{nullptr};
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int mDataSize{0};
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std::atomic<ALenum> mKillNow{AL_TRUE};
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std::thread mThread;
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ALCsolarisBackend(ALCdevice *device) noexcept : ALCbackend{device} { }
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};
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static int ALCsolarisBackend_mixerProc(ALCsolarisBackend *self);
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static void ALCsolarisBackend_Construct(ALCsolarisBackend *self, ALCdevice *device);
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static void ALCsolarisBackend_Destruct(ALCsolarisBackend *self);
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static ALCenum ALCsolarisBackend_open(ALCsolarisBackend *self, const ALCchar *name);
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static ALCboolean ALCsolarisBackend_reset(ALCsolarisBackend *self);
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static ALCboolean ALCsolarisBackend_start(ALCsolarisBackend *self);
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static void ALCsolarisBackend_stop(ALCsolarisBackend *self);
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static DECLARE_FORWARD2(ALCsolarisBackend, ALCbackend, ALCenum, captureSamples, void*, ALCuint)
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static DECLARE_FORWARD(ALCsolarisBackend, ALCbackend, ALCuint, availableSamples)
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static DECLARE_FORWARD(ALCsolarisBackend, ALCbackend, ClockLatency, getClockLatency)
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static DECLARE_FORWARD(ALCsolarisBackend, ALCbackend, void, lock)
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static DECLARE_FORWARD(ALCsolarisBackend, ALCbackend, void, unlock)
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DECLARE_DEFAULT_ALLOCATORS(ALCsolarisBackend)
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DEFINE_ALCBACKEND_VTABLE(ALCsolarisBackend);
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static const ALCchar solaris_device[] = "Solaris Default";
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static const char *solaris_driver = "/dev/audio";
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static void ALCsolarisBackend_Construct(ALCsolarisBackend *self, ALCdevice *device)
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{
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new (self) ALCsolarisBackend{device};
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SET_VTABLE2(ALCsolarisBackend, ALCbackend, self);
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}
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static void ALCsolarisBackend_Destruct(ALCsolarisBackend *self)
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{
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if(self->mFd != -1)
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close(self->mFd);
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self->mFd = -1;
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free(self->mMixData);
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self->mMixData = nullptr;
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self->mDataSize = 0;
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self->~ALCsolarisBackend();
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}
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static int ALCsolarisBackend_mixerProc(ALCsolarisBackend *self)
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{
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ALCdevice *device{self->mDevice};
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SetRTPriority();
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althrd_setname(MIXER_THREAD_NAME);
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const int frame_size{device->frameSizeFromFmt()};
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ALCsolarisBackend_lock(self);
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while(!self->mKillNow.load(std::memory_order_acquire) &&
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device->Connected.load(std::memory_order_acquire))
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{
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pollfd pollitem{};
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pollitem.fd = self->mFd;
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pollitem.events = POLLOUT;
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ALCsolarisBackend_unlock(self);
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int pret{poll(&pollitem, 1, 1000)};
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ALCsolarisBackend_lock(self);
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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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aluHandleDisconnect(device, "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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ALubyte *write_ptr{self->mMixData};
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int to_write{self->mDataSize};
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aluMixData(device, write_ptr, to_write/frame_size);
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while(to_write > 0 && !self->mKillNow.load())
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{
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ssize_t wrote{write(self->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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aluHandleDisconnect(device, "Failed to write playback samples: %s",
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strerror(errno));
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break;
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}
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to_write -= wrote;
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write_ptr += wrote;
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}
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}
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ALCsolarisBackend_unlock(self);
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return 0;
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}
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static ALCenum ALCsolarisBackend_open(ALCsolarisBackend *self, const ALCchar *name)
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{
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ALCdevice *device;
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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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return ALC_INVALID_VALUE;
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self->mFd = open(solaris_driver, O_WRONLY);
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if(self->mFd == -1)
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{
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ERR("Could not open %s: %s\n", solaris_driver, strerror(errno));
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return ALC_INVALID_VALUE;
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}
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device = self->mDevice;
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device->DeviceName = name;
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return ALC_NO_ERROR;
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}
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static ALCboolean ALCsolarisBackend_reset(ALCsolarisBackend *self)
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{
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ALCdevice *device{self->mDevice};
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audio_info_t info;
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ALsizei frameSize;
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ALsizei numChannels;
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AUDIO_INITINFO(&info);
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info.play.sample_rate = device->Frequency;
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if(device->FmtChans != DevFmtMono)
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device->FmtChans = DevFmtStereo;
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numChannels = device->channelsFromFmt();
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info.play.channels = numChannels;
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switch(device->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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device->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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frameSize = numChannels * device->bytesFromFmt();
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info.play.buffer_size = device->UpdateSize*device->NumUpdates * frameSize;
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if(ioctl(self->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 ALC_FALSE;
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}
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if(device->channelsFromFmt() != (ALsizei)info.play.channels)
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{
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ERR("Failed to set %s, got %u channels instead\n", DevFmtChannelsString(device->FmtChans),
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info.play.channels);
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return ALC_FALSE;
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}
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if(!((info.play.precision == 8 && info.play.encoding == AUDIO_ENCODING_LINEAR8 && device->FmtType == DevFmtUByte) ||
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(info.play.precision == 8 && info.play.encoding == AUDIO_ENCODING_LINEAR && device->FmtType == DevFmtByte) ||
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(info.play.precision == 16 && info.play.encoding == AUDIO_ENCODING_LINEAR && device->FmtType == DevFmtShort) ||
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(info.play.precision == 32 && info.play.encoding == AUDIO_ENCODING_LINEAR && device->FmtType == DevFmtInt)))
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{
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ERR("Could not set %s samples, got %d (0x%x)\n", DevFmtTypeString(device->FmtType),
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info.play.precision, info.play.encoding);
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return ALC_FALSE;
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}
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device->Frequency = info.play.sample_rate;
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device->UpdateSize = (info.play.buffer_size/device->NumUpdates) + 1;
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SetDefaultChannelOrder(device);
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free(self->mMixData);
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self->mDataSize = device->UpdateSize * device->frameSizeFromFmt();
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self->mMixData = static_cast<ALubyte*>(calloc(1, self->mDataSize));
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return ALC_TRUE;
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}
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static ALCboolean ALCsolarisBackend_start(ALCsolarisBackend *self)
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{
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try {
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self->mKillNow.store(AL_FALSE);
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self->mThread = std::thread(ALCsolarisBackend_mixerProc, self);
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return ALC_TRUE;
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}
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catch(std::exception& e) {
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ERR("Could not create playback thread: %s\n", e.what());
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}
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catch(...) {
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}
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return ALC_FALSE;
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}
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static void ALCsolarisBackend_stop(ALCsolarisBackend *self)
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{
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if(self->mKillNow.exchange(AL_TRUE) || !self->mThread.joinable())
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return;
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self->mThread.join();
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if(ioctl(self->mFd, AUDIO_DRAIN) < 0)
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ERR("Error draining device: %s\n", strerror(errno));
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}
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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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ConfigValueStr(nullptr, "solaris", "device", &solaris_driver);
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return true;
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}
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bool SolarisBackendFactory::querySupport(ALCbackend_Type type)
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{ return (type == ALCbackend_Playback); }
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void SolarisBackendFactory::probe(DevProbe type, std::string *outnames)
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{
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switch(type)
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{
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case ALL_DEVICE_PROBE:
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{
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#ifdef HAVE_STAT
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struct stat buf;
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if(stat(solaris_driver, &buf) == 0)
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#endif
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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 CAPTURE_DEVICE_PROBE:
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break;
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}
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}
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ALCbackend *SolarisBackendFactory::createBackend(ALCdevice *device, ALCbackend_Type type)
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{
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if(type == ALCbackend_Playback)
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{
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ALCsolarisBackend *backend;
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NEW_OBJ(backend, ALCsolarisBackend)(device);
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return backend;
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}
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return nullptr;
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}
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