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Revert fluid_sdl2.c to fix build errors for Windows
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maron2000
parent
9ff5bd99f6
commit
40c4e39c9f
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/* FluidSynth - A Software Synthesizer
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*
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* Copyright (C) 2003 Peter Hanappe and others.
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* Copyright (C) 2018 Carlo Bramini
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*
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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 Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* 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, but
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* 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#define FLUIDINC
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#include "config.h"
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#if !C_FLUIDSYNTH && defined(WIN32) && !defined(C_HX_DOS)
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#include "fluid_synth.h"
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#include "fluid_adriver.h"
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#include "fluid_settings.h"
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#if defined(C_SDL2)
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#include "SDL.h"
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typedef struct
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{
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fluid_audio_driver_t driver;
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fluid_synth_t *synth;
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fluid_audio_callback_t write_ptr;
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SDL_AudioDeviceID devid;
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int frame_size;
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} fluid_sdl2_audio_driver_t;
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int delete_fluid_sdl2_audio_driver(fluid_audio_driver_t* d);
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static void
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SDLAudioCallback(void *data, void *stream, int len)
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{
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fluid_sdl2_audio_driver_t *dev = (fluid_sdl2_audio_driver_t *)data;
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len /= dev->frame_size;
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dev->write_ptr(dev->synth, len, stream, 0, 2, stream, 1, 2);
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}
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void fluid_sdl2_audio_driver_settings(fluid_settings_t *settings)
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{
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int n, nDevs;
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fluid_settings_register_str(settings, "audio.sdl2.device", "default", 0,NULL,NULL);
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fluid_settings_add_option(settings, "audio.sdl2.device", "default");
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if(!SDL_WasInit(SDL_INIT_AUDIO))
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{
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FLUID_LOG(FLUID_ERR, "SDL2 not initialized");
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return;
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}
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nDevs = SDL_GetNumAudioDevices(0);
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for(n = 0; n < nDevs; n++)
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{
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const char *dev_name = SDL_GetAudioDeviceName(n, 0);
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if(dev_name != NULL)
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{
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FLUID_LOG(FLUID_DBG, "SDL2 driver testing audio device: %s", dev_name);
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fluid_settings_add_option(settings, "audio.sdl2.device", dev_name);
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}
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}
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}
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/*
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* new_fluid_sdl2_audio_driver
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*/
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fluid_audio_driver_t *
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new_fluid_sdl2_audio_driver(fluid_settings_t *settings, fluid_synth_t *synth)
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{
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fluid_sdl2_audio_driver_t *dev = NULL;
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fluid_audio_callback_t write_ptr;
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double sample_rate;
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int period_size, sample_size;
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SDL_AudioSpec aspec, rspec;
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char *device;
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const char *dev_name;
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/* Check if SDL library has been started */
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if(!SDL_WasInit(SDL_INIT_AUDIO))
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{
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FLUID_LOG(FLUID_ERR, "Failed to create SDL2 audio driver, because the audio subsystem of SDL2 is not initialized.");
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return NULL;
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}
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/* Retrieve the settings */
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fluid_settings_getnum(settings, "synth.sample-rate", &sample_rate);
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fluid_settings_getint(settings, "audio.period-size", &period_size);
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/* Lower values do not seem to give good results */
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if(period_size < 1024)
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{
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period_size = 1024;
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}
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else
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{
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/* According to documentation, it MUST be a power of two */
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if((period_size & (period_size - 1)) != 0)
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{
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FLUID_LOG(FLUID_ERR, "\"audio.period-size\" must be a power of 2 for SDL2");
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return NULL;
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}
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}
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/* Clear the format buffer */
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FLUID_MEMSET(&aspec, 0, sizeof(aspec));
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/* Setup mixing frequency */
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aspec.freq = (int)sample_rate;
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/* Check the format */
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if(fluid_settings_str_equal(settings, "audio.sample-format", "float"))
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{
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FLUID_LOG(FLUID_DBG, "Selected 32 bit sample format");
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sample_size = sizeof(float);
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write_ptr = fluid_synth_write_float;
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aspec.format = AUDIO_F32SYS;
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}
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else if(fluid_settings_str_equal(settings, "audio.sample-format", "16bits"))
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{
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FLUID_LOG(FLUID_DBG, "Selected 16 bit sample format");
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sample_size = sizeof(short);
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write_ptr = fluid_synth_write_s16;
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aspec.format = AUDIO_S16SYS;
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}
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else
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{
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FLUID_LOG(FLUID_ERR, "Unhandled sample format");
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return NULL;
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}
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/* Compile the format buffer */
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aspec.channels = 2;
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aspec.samples = aspec.channels * ((period_size + 7) & ~7);
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aspec.callback = (SDL_AudioCallback)SDLAudioCallback;
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/* Set default device to use */
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device = NULL;
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dev_name = NULL;
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/* get the selected device name. if none is specified, use default device. */
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if(fluid_settings_dupstr(settings, "audio.sdl2.device", &device) == FLUID_OK
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&& device != NULL && device[0] != '\0')
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{
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int n, nDevs = SDL_GetNumAudioDevices(0);
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for(n = 0; n < nDevs; n++)
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{
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dev_name = SDL_GetAudioDeviceName(n, 0);
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if(FLUID_STRCASECMP(dev_name, device) == 0)
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{
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FLUID_LOG(FLUID_DBG, "Selected audio device GUID: %s", dev_name);
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break;
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}
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}
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if(n >= nDevs)
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{
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FLUID_LOG(FLUID_DBG, "Audio device %s, using \"default\"", device);
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dev_name = NULL;
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}
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}
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if(device != NULL)
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{
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FLUID_FREE(device);
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}
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do
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{
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/* create and clear the driver data */
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dev = FLUID_NEW(fluid_sdl2_audio_driver_t);
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if(dev == NULL)
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{
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FLUID_LOG(FLUID_ERR, "Out of memory");
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break;
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}
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FLUID_MEMSET(dev, 0, sizeof(fluid_sdl2_audio_driver_t));
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/* set device pointer to userdata */
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aspec.userdata = dev;
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/* Save copy of synth */
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dev->synth = synth;
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/* Save copy of other variables */
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dev->write_ptr = write_ptr;
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dev->frame_size = sample_size * aspec.channels;
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/* Open audio device */
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dev->devid = SDL_OpenAudioDevice(dev_name, 0, &aspec, &rspec, 0);
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if(!dev->devid)
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{
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FLUID_LOG(FLUID_ERR, "Failed to open audio device");
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break;
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}
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/* Start to play */
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SDL_PauseAudioDevice(dev->devid, 0);
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return (fluid_audio_driver_t *) dev;
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}
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while(0);
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int rt=delete_fluid_sdl2_audio_driver(&dev->driver);
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return NULL;
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}
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int delete_fluid_sdl2_audio_driver(fluid_audio_driver_t *d)
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{
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fluid_sdl2_audio_driver_t *dev = (fluid_sdl2_audio_driver_t *) d;
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if(dev != NULL)
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{
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if(dev->devid)
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{
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/* Stop audio and close */
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SDL_PauseAudioDevice(dev->devid, 1);
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SDL_CloseAudioDevice(dev->devid);
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}
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FLUID_FREE(dev);
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}
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return 0;
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}
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#endif /* SDL2_SUPPORT */
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#endif
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