aboutsummaryrefslogtreecommitdiffstats
path: root/Alc/backends/sdl2.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'Alc/backends/sdl2.cpp')
-rw-r--r--Alc/backends/sdl2.cpp223
1 files changed, 0 insertions, 223 deletions
diff --git a/Alc/backends/sdl2.cpp b/Alc/backends/sdl2.cpp
deleted file mode 100644
index 97547959..00000000
--- a/Alc/backends/sdl2.cpp
+++ /dev/null
@@ -1,223 +0,0 @@
-/**
- * OpenAL cross platform audio library
- * Copyright (C) 2018 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/sdl2.h"
-
-#include <stdlib.h>
-#include <SDL2/SDL.h>
-
-#include <string>
-
-#include "alcmain.h"
-#include "alu.h"
-#include "threads.h"
-#include "compat.h"
-
-
-namespace {
-
-#ifdef _WIN32
-#define DEVNAME_PREFIX "OpenAL Soft on "
-#else
-#define DEVNAME_PREFIX ""
-#endif
-
-constexpr ALCchar defaultDeviceName[] = DEVNAME_PREFIX "Default Device";
-
-struct Sdl2Backend final : public BackendBase {
- Sdl2Backend(ALCdevice *device) noexcept : BackendBase{device} { }
- ~Sdl2Backend() override;
-
- static void audioCallbackC(void *ptr, Uint8 *stream, int len);
- void audioCallback(Uint8 *stream, int len);
-
- ALCenum open(const ALCchar *name) override;
- ALCboolean reset() override;
- ALCboolean start() override;
- void stop() override;
- void lock() override;
- void unlock() override;
-
- SDL_AudioDeviceID mDeviceID{0u};
- ALsizei mFrameSize{0};
-
- ALuint mFrequency{0u};
- DevFmtChannels mFmtChans{};
- DevFmtType mFmtType{};
- ALuint mUpdateSize{0u};
-
- DEF_NEWDEL(Sdl2Backend)
-};
-
-Sdl2Backend::~Sdl2Backend()
-{
- if(mDeviceID)
- SDL_CloseAudioDevice(mDeviceID);
- mDeviceID = 0;
-}
-
-void Sdl2Backend::audioCallbackC(void *ptr, Uint8 *stream, int len)
-{ static_cast<Sdl2Backend*>(ptr)->audioCallback(stream, len); }
-
-void Sdl2Backend::audioCallback(Uint8 *stream, int len)
-{
- assert((len % mFrameSize) == 0);
- aluMixData(mDevice, stream, len / mFrameSize);
-}
-
-ALCenum Sdl2Backend::open(const ALCchar *name)
-{
- SDL_AudioSpec want{}, have{};
- want.freq = mDevice->Frequency;
- switch(mDevice->FmtType)
- {
- case DevFmtUByte: want.format = AUDIO_U8; break;
- case DevFmtByte: want.format = AUDIO_S8; break;
- case DevFmtUShort: want.format = AUDIO_U16SYS; break;
- case DevFmtShort: want.format = AUDIO_S16SYS; break;
- case DevFmtUInt: /* fall-through */
- case DevFmtInt: want.format = AUDIO_S32SYS; break;
- case DevFmtFloat: want.format = AUDIO_F32; break;
- }
- want.channels = (mDevice->FmtChans == DevFmtMono) ? 1 : 2;
- want.samples = mDevice->UpdateSize;
- want.callback = &Sdl2Backend::audioCallbackC;
- want.userdata = this;
-
- /* Passing nullptr to SDL_OpenAudioDevice opens a default, which isn't
- * necessarily the first in the list.
- */
- if(!name || strcmp(name, defaultDeviceName) == 0)
- mDeviceID = SDL_OpenAudioDevice(nullptr, SDL_FALSE, &want, &have,
- SDL_AUDIO_ALLOW_ANY_CHANGE);
- else
- {
- const size_t prefix_len = strlen(DEVNAME_PREFIX);
- if(strncmp(name, DEVNAME_PREFIX, prefix_len) == 0)
- mDeviceID = SDL_OpenAudioDevice(name+prefix_len, SDL_FALSE, &want, &have,
- SDL_AUDIO_ALLOW_ANY_CHANGE);
- else
- mDeviceID = SDL_OpenAudioDevice(name, SDL_FALSE, &want, &have,
- SDL_AUDIO_ALLOW_ANY_CHANGE);
- }
- if(mDeviceID == 0)
- return ALC_INVALID_VALUE;
-
- mDevice->Frequency = have.freq;
- if(have.channels == 1)
- mDevice->FmtChans = DevFmtMono;
- else if(have.channels == 2)
- mDevice->FmtChans = DevFmtStereo;
- else
- {
- ERR("Got unhandled SDL channel count: %d\n", (int)have.channels);
- return ALC_INVALID_VALUE;
- }
- switch(have.format)
- {
- case AUDIO_U8: mDevice->FmtType = DevFmtUByte; break;
- case AUDIO_S8: mDevice->FmtType = DevFmtByte; break;
- case AUDIO_U16SYS: mDevice->FmtType = DevFmtUShort; break;
- case AUDIO_S16SYS: mDevice->FmtType = DevFmtShort; break;
- case AUDIO_S32SYS: mDevice->FmtType = DevFmtInt; break;
- case AUDIO_F32SYS: mDevice->FmtType = DevFmtFloat; break;
- default:
- ERR("Got unsupported SDL format: 0x%04x\n", have.format);
- return ALC_INVALID_VALUE;
- }
- mDevice->UpdateSize = have.samples;
- mDevice->BufferSize = have.samples * 2; /* SDL always (tries to) use two periods. */
-
- mFrameSize = mDevice->frameSizeFromFmt();
- mFrequency = mDevice->Frequency;
- mFmtChans = mDevice->FmtChans;
- mFmtType = mDevice->FmtType;
- mUpdateSize = mDevice->UpdateSize;
-
- mDevice->DeviceName = name ? name : defaultDeviceName;
- return ALC_NO_ERROR;
-}
-
-ALCboolean Sdl2Backend::reset()
-{
- mDevice->Frequency = mFrequency;
- mDevice->FmtChans = mFmtChans;
- mDevice->FmtType = mFmtType;
- mDevice->UpdateSize = mUpdateSize;
- mDevice->BufferSize = mUpdateSize * 2;
- SetDefaultWFXChannelOrder(mDevice);
- return ALC_TRUE;
-}
-
-ALCboolean Sdl2Backend::start()
-{
- SDL_PauseAudioDevice(mDeviceID, 0);
- return ALC_TRUE;
-}
-
-void Sdl2Backend::stop()
-{ SDL_PauseAudioDevice(mDeviceID, 1); }
-
-void Sdl2Backend::lock()
-{ SDL_LockAudioDevice(mDeviceID); }
-
-void Sdl2Backend::unlock()
-{ SDL_UnlockAudioDevice(mDeviceID); }
-
-} // namespace
-
-BackendFactory &SDL2BackendFactory::getFactory()
-{
- static SDL2BackendFactory factory{};
- return factory;
-}
-
-bool SDL2BackendFactory::init()
-{ return (SDL_InitSubSystem(SDL_INIT_AUDIO) == 0); }
-
-bool SDL2BackendFactory::querySupport(BackendType type)
-{ return type == BackendType::Playback; }
-
-void SDL2BackendFactory::probe(DevProbe type, std::string *outnames)
-{
- if(type != DevProbe::Playback)
- return;
-
- int num_devices{SDL_GetNumAudioDevices(SDL_FALSE)};
-
- /* Includes null char. */
- outnames->append(defaultDeviceName, sizeof(defaultDeviceName));
- for(int i{0};i < num_devices;++i)
- {
- std::string name{DEVNAME_PREFIX};
- name += SDL_GetAudioDeviceName(i, SDL_FALSE);
- if(!name.empty())
- outnames->append(name.c_str(), name.length()+1);
- }
-}
-
-BackendPtr SDL2BackendFactory::createBackend(ALCdevice *device, BackendType type)
-{
- if(type == BackendType::Playback)
- return BackendPtr{new Sdl2Backend{device}};
- return nullptr;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 12:16:28 +0000