From e7ab5053e4374273a4da41fb3622565c40e646e2 Mon Sep 17 00:00:00 2001 From: Chris Robinson Date: Mon, 12 Nov 2018 22:57:39 -0800 Subject: Convert the SDL2 backend to C++ --- Alc/backends/sdl2.c | 288 ---------------------------------------------------- 1 file changed, 288 deletions(-) delete mode 100644 Alc/backends/sdl2.c (limited to 'Alc/backends/sdl2.c') diff --git a/Alc/backends/sdl2.c b/Alc/backends/sdl2.c deleted file mode 100644 index 3495e6bf..00000000 --- a/Alc/backends/sdl2.c +++ /dev/null @@ -1,288 +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 -#include - -#include "alMain.h" -#include "alu.h" -#include "threads.h" -#include "compat.h" - -#include "backends/base.h" - - -#ifdef _WIN32 -#define DEVNAME_PREFIX "OpenAL Soft on " -#else -#define DEVNAME_PREFIX "" -#endif - -typedef struct ALCsdl2Backend { - DERIVE_FROM_TYPE(ALCbackend); - - SDL_AudioDeviceID deviceID; - ALsizei frameSize; - - ALuint Frequency; - enum DevFmtChannels FmtChans; - enum DevFmtType FmtType; - ALuint UpdateSize; -} ALCsdl2Backend; - -static void ALCsdl2Backend_Construct(ALCsdl2Backend *self, ALCdevice *device); -static void ALCsdl2Backend_Destruct(ALCsdl2Backend *self); -static ALCenum ALCsdl2Backend_open(ALCsdl2Backend *self, const ALCchar *name); -static ALCboolean ALCsdl2Backend_reset(ALCsdl2Backend *self); -static ALCboolean ALCsdl2Backend_start(ALCsdl2Backend *self); -static void ALCsdl2Backend_stop(ALCsdl2Backend *self); -static DECLARE_FORWARD2(ALCsdl2Backend, ALCbackend, ALCenum, captureSamples, void*, ALCuint) -static DECLARE_FORWARD(ALCsdl2Backend, ALCbackend, ALCuint, availableSamples) -static DECLARE_FORWARD(ALCsdl2Backend, ALCbackend, ClockLatency, getClockLatency) -static void ALCsdl2Backend_lock(ALCsdl2Backend *self); -static void ALCsdl2Backend_unlock(ALCsdl2Backend *self); -DECLARE_DEFAULT_ALLOCATORS(ALCsdl2Backend) - -DEFINE_ALCBACKEND_VTABLE(ALCsdl2Backend); - -static const ALCchar defaultDeviceName[] = DEVNAME_PREFIX "Default Device"; - -static void ALCsdl2Backend_Construct(ALCsdl2Backend *self, ALCdevice *device) -{ - ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device); - SET_VTABLE2(ALCsdl2Backend, ALCbackend, self); - - self->deviceID = 0; - self->frameSize = FrameSizeFromDevFmt(device->FmtChans, device->FmtType, device->AmbiOrder); - self->Frequency = device->Frequency; - self->FmtChans = device->FmtChans; - self->FmtType = device->FmtType; - self->UpdateSize = device->UpdateSize; -} - -static void ALCsdl2Backend_Destruct(ALCsdl2Backend *self) -{ - if(self->deviceID) - SDL_CloseAudioDevice(self->deviceID); - self->deviceID = 0; - - ALCbackend_Destruct(STATIC_CAST(ALCbackend, self)); -} - - -static void ALCsdl2Backend_audioCallback(void *ptr, Uint8 *stream, int len) -{ - ALCsdl2Backend *self = (ALCsdl2Backend*)ptr; - ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice; - - assert((len % self->frameSize) == 0); - aluMixData(device, stream, len / self->frameSize); -} - -static ALCenum ALCsdl2Backend_open(ALCsdl2Backend *self, const ALCchar *name) -{ - ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice; - SDL_AudioSpec want, have; - - SDL_zero(want); - SDL_zero(have); - - want.freq = device->Frequency; - switch(device->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 = (device->FmtChans == DevFmtMono) ? 1 : 2; - want.samples = device->UpdateSize; - want.callback = ALCsdl2Backend_audioCallback; - want.userdata = self; - - /* Passing NULL to SDL_OpenAudioDevice opens a default, which isn't - * necessarily the first in the list. - */ - if(!name || strcmp(name, defaultDeviceName) == 0) - self->deviceID = SDL_OpenAudioDevice(NULL, 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) - self->deviceID = SDL_OpenAudioDevice(name+prefix_len, SDL_FALSE, &want, &have, - SDL_AUDIO_ALLOW_ANY_CHANGE); - else - self->deviceID = SDL_OpenAudioDevice(name, SDL_FALSE, &want, &have, - SDL_AUDIO_ALLOW_ANY_CHANGE); - } - if(self->deviceID == 0) - return ALC_INVALID_VALUE; - - device->Frequency = have.freq; - if(have.channels == 1) - device->FmtChans = DevFmtMono; - else if(have.channels == 2) - device->FmtChans = DevFmtStereo; - else - { - ERR("Got unhandled SDL channel count: %d\n", (int)have.channels); - return ALC_INVALID_VALUE; - } - switch(have.format) - { - case AUDIO_U8: device->FmtType = DevFmtUByte; break; - case AUDIO_S8: device->FmtType = DevFmtByte; break; - case AUDIO_U16SYS: device->FmtType = DevFmtUShort; break; - case AUDIO_S16SYS: device->FmtType = DevFmtShort; break; - case AUDIO_S32SYS: device->FmtType = DevFmtInt; break; - case AUDIO_F32SYS: device->FmtType = DevFmtFloat; break; - default: - ERR("Got unsupported SDL format: 0x%04x\n", have.format); - return ALC_INVALID_VALUE; - } - device->UpdateSize = have.samples; - device->NumUpdates = 2; /* SDL always (tries to) use two periods. */ - - self->frameSize = FrameSizeFromDevFmt(device->FmtChans, device->FmtType, device->AmbiOrder); - self->Frequency = device->Frequency; - self->FmtChans = device->FmtChans; - self->FmtType = device->FmtType; - self->UpdateSize = device->UpdateSize; - - alstr_copy_cstr(&device->DeviceName, name ? name : defaultDeviceName); - - return ALC_NO_ERROR; -} - -static ALCboolean ALCsdl2Backend_reset(ALCsdl2Backend *self) -{ - ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice; - device->Frequency = self->Frequency; - device->FmtChans = self->FmtChans; - device->FmtType = self->FmtType; - device->UpdateSize = self->UpdateSize; - device->NumUpdates = 2; - SetDefaultWFXChannelOrder(device); - return ALC_TRUE; -} - -static ALCboolean ALCsdl2Backend_start(ALCsdl2Backend *self) -{ - SDL_PauseAudioDevice(self->deviceID, 0); - return ALC_TRUE; -} - -static void ALCsdl2Backend_stop(ALCsdl2Backend *self) -{ - SDL_PauseAudioDevice(self->deviceID, 1); -} - -static void ALCsdl2Backend_lock(ALCsdl2Backend *self) -{ - SDL_LockAudioDevice(self->deviceID); -} - -static void ALCsdl2Backend_unlock(ALCsdl2Backend *self) -{ - SDL_UnlockAudioDevice(self->deviceID); -} - - -typedef struct ALCsdl2BackendFactory { - DERIVE_FROM_TYPE(ALCbackendFactory); -} ALCsdl2BackendFactory; -#define ALCsdl2BACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCsdl2BackendFactory, ALCbackendFactory) } } - -ALCbackendFactory *ALCsdl2BackendFactory_getFactory(void); - -static ALCboolean ALCsdl2BackendFactory_init(ALCsdl2BackendFactory *self); -static void ALCsdl2BackendFactory_deinit(ALCsdl2BackendFactory *self); -static ALCboolean ALCsdl2BackendFactory_querySupport(ALCsdl2BackendFactory *self, ALCbackend_Type type); -static void ALCsdl2BackendFactory_probe(ALCsdl2BackendFactory *self, enum DevProbe type, al_string *outnames); -static ALCbackend* ALCsdl2BackendFactory_createBackend(ALCsdl2BackendFactory *self, ALCdevice *device, ALCbackend_Type type); -DEFINE_ALCBACKENDFACTORY_VTABLE(ALCsdl2BackendFactory); - - -ALCbackendFactory *ALCsdl2BackendFactory_getFactory(void) -{ - static ALCsdl2BackendFactory factory = ALCsdl2BACKENDFACTORY_INITIALIZER; - return STATIC_CAST(ALCbackendFactory, &factory); -} - - -static ALCboolean ALCsdl2BackendFactory_init(ALCsdl2BackendFactory* UNUSED(self)) -{ - if(SDL_InitSubSystem(SDL_INIT_AUDIO) == 0) - return AL_TRUE; - return ALC_FALSE; -} - -static void ALCsdl2BackendFactory_deinit(ALCsdl2BackendFactory* UNUSED(self)) -{ - SDL_QuitSubSystem(SDL_INIT_AUDIO); -} - -static ALCboolean ALCsdl2BackendFactory_querySupport(ALCsdl2BackendFactory* UNUSED(self), ALCbackend_Type type) -{ - if(type == ALCbackend_Playback) - return ALC_TRUE; - return ALC_FALSE; -} - -static void ALCsdl2BackendFactory_probe(ALCsdl2BackendFactory* UNUSED(self), enum DevProbe type, al_string *outnames) -{ - int num_devices, i; - al_string name; - - if(type != ALL_DEVICE_PROBE) - return; - - AL_STRING_INIT(name); - num_devices = SDL_GetNumAudioDevices(SDL_FALSE); - - alstr_append_range(outnames, defaultDeviceName, defaultDeviceName+sizeof(defaultDeviceName)); - for(i = 0;i < num_devices;++i) - { - alstr_copy_cstr(&name, DEVNAME_PREFIX); - alstr_append_cstr(&name, SDL_GetAudioDeviceName(i, SDL_FALSE)); - if(!alstr_empty(name)) - alstr_append_range(outnames, VECTOR_BEGIN(name), VECTOR_END(name)+1); - } - alstr_reset(&name); -} - -static ALCbackend* ALCsdl2BackendFactory_createBackend(ALCsdl2BackendFactory* UNUSED(self), ALCdevice *device, ALCbackend_Type type) -{ - if(type == ALCbackend_Playback) - { - ALCsdl2Backend *backend; - NEW_OBJ(backend, ALCsdl2Backend)(device); - if(!backend) return NULL; - return STATIC_CAST(ALCbackend, backend); - } - - return NULL; -} -- cgit v1.2.3