mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-16 01:35:07 +00:00
144 lines
3.5 KiB
C++
144 lines
3.5 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2022 tildearrow and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <SDL_audio.h>
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#include <string.h>
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#include <vector>
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#include "../ta-log.h"
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#include "sdl.h"
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void taSDLProcess(void* inst, unsigned char* buf, int nframes) {
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TAAudioSDL* in=(TAAudioSDL*)inst;
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in->onProcess(buf,nframes);
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}
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void TAAudioSDL::onProcess(unsigned char* buf, int nframes) {
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if (audioProcCallback!=NULL) {
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if (midiIn!=NULL) midiIn->gather();
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audioProcCallback(audioProcCallbackUser,inBufs,outBufs,desc.inChans,desc.outChans,desc.bufsize);
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}
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float* fbuf=(float*)buf;
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for (size_t j=0; j<desc.bufsize; j++) {
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for (size_t i=0; i<desc.outChans; i++) {
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fbuf[j*desc.outChans+i]=outBufs[i][j];
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}
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}
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}
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void* TAAudioSDL::getContext() {
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return (void*)∾
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}
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bool TAAudioSDL::quit() {
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if (!initialized) return false;
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SDL_CloseAudioDevice(ai);
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if (running) {
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running=false;
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}
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for (int i=0; i<desc.outChans; i++) {
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delete[] outBufs[i];
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}
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delete[] outBufs;
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initialized=false;
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return true;
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}
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bool TAAudioSDL::setRun(bool run) {
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if (!initialized) return false;
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SDL_PauseAudioDevice(ai,!run);
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running=run;
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return running;
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}
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std::vector<String> TAAudioSDL::listAudioDevices() {
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std::vector<String> ret;
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if (!audioSysStarted) {
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if (SDL_Init(SDL_INIT_AUDIO)<0) {
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logE("could not initialize SDL to list audio devices");
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} else {
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audioSysStarted=true;
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}
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}
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int count=SDL_GetNumAudioDevices(false);
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if (count<0) return ret;
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for (int i=0; i<count; i++) {
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const char* devName=SDL_GetAudioDeviceName(i,false);
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if (devName!=NULL) {
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ret.push_back(String(devName));
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}
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}
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return ret;
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}
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bool TAAudioSDL::init(TAAudioDesc& request, TAAudioDesc& response) {
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if (initialized) {
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logE("audio already initialized");
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return false;
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}
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if (!audioSysStarted) {
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if (SDL_Init(SDL_INIT_AUDIO)<0) {
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logE("could not initialize SDL");
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return false;
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}
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audioSysStarted=true;
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}
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desc=request;
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desc.outFormat=TA_AUDIO_FORMAT_F32;
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ac.freq=desc.rate;
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ac.format=AUDIO_F32;
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ac.channels=desc.outChans;
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ac.samples=desc.bufsize;
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ac.callback=taSDLProcess;
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ac.userdata=this;
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ai=SDL_OpenAudioDevice(request.deviceName.empty()?NULL:request.deviceName.c_str(),0,&ac,&ar,SDL_AUDIO_ALLOW_FREQUENCY_CHANGE);
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if (ai==0) {
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logE("could not open audio device: %s",SDL_GetError());
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return false;
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}
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desc.deviceName=request.deviceName;
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desc.name="";
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desc.rate=ar.freq;
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desc.inChans=0;
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desc.outChans=ar.channels;
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desc.bufsize=ar.samples;
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desc.fragments=1;
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if (desc.outChans>0) {
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outBufs=new float*[desc.outChans];
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for (int i=0; i<desc.outChans; i++) {
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outBufs[i]=new float[desc.bufsize];
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}
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}
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response=desc;
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initialized=true;
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return true;
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}
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