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https://github.com/Ryujinx/SDL.git
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Added an audio recording test program
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@ -9,6 +9,7 @@ LIBS = @LIBS@
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TARGETS = \
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checkkeys$(EXE) \
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loopbackaudio$(EXE) \
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loopwave$(EXE) \
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loopwavequeue$(EXE) \
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testatomic$(EXE) \
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@ -75,6 +76,9 @@ Makefile: $(srcdir)/Makefile.in
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checkkeys$(EXE): $(srcdir)/checkkeys.c
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$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
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loopbackaudio$(EXE): $(srcdir)/loopbackaudio.c
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$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
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loopwave$(EXE): $(srcdir)/loopwave.c
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$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
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@ -2,6 +2,7 @@
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These are test programs for the SDL library:
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checkkeys Watch the key events to check the keyboard
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loopbackaudio Audio test -- record from the microphone and play it back immediately
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loopwave Audio test -- loop playing a WAV file
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loopwavequeue Audio test -- loop playing a WAV file with SDL_QueueAudio
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testaudioinfo Lists audio device capabilities
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166
test/loopbackaudio.c
Normal file
166
test/loopbackaudio.c
Normal file
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@ -0,0 +1,166 @@
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/*
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Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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/* Program to record audio from the microphone and play it back immediately */
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#include "SDL_config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#if HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#ifdef __EMSCRIPTEN__
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#include <emscripten/emscripten.h>
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#endif
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#include "SDL.h"
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static SDL_AudioDeviceID device;
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static SDL_AudioDeviceID capture;
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static void SDLCALL
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fillerup(void *unused, Uint8 * stream, int len)
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{
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SDL_QueueAudio(device, stream, len);
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}
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/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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static void
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quit(int rc)
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{
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SDL_Quit();
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exit(rc);
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}
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static void
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close_audio()
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{
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if (capture != 0) {
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SDL_CloseAudioDevice(capture);
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capture = 0;
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}
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if (device != 0) {
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SDL_CloseAudioDevice(device);
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device = 0;
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}
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}
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static void
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open_audio()
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{
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SDL_AudioSpec spec;
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SDL_zero(spec);
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spec.freq = 44100;
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spec.format = AUDIO_S16;
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spec.channels = 1;
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spec.samples = 1024;
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spec.callback = fillerup;
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capture = SDL_OpenAudioDevice(NULL, SDL_TRUE, &spec, &spec, SDL_AUDIO_ALLOW_ANY_CHANGE);
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if (!capture) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't open microphone: %s\n", SDL_GetError());
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quit(2);
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}
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spec.callback = NULL;
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device = SDL_OpenAudioDevice(NULL, SDL_FALSE, &spec, NULL, 0);
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if (!device) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't open audio: %s\n", SDL_GetError());
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quit(2);
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}
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/* Let the audio run */
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SDL_PauseAudioDevice(capture, SDL_FALSE);
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SDL_PauseAudioDevice(device, SDL_FALSE);
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}
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static void reopen_audio()
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{
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close_audio();
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open_audio();
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}
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static int done = 0;
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void
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poked(int sig)
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{
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done = 1;
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}
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#ifdef __EMSCRIPTEN__
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void
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loop()
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{
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if(done || (SDL_GetAudioDeviceStatus(capture) != SDL_AUDIO_PLAYING) || (SDL_GetAudioDeviceStatus(device) != SDL_AUDIO_PLAYING))
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emscripten_cancel_main_loop();
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}
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#endif
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int
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main(int argc, char *argv[])
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{
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int i;
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/* Enable standard application logging */
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SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
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/* Load the SDL library */
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if (SDL_Init(SDL_INIT_AUDIO|SDL_INIT_EVENTS) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
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return (1);
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}
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/* Show the list of available drivers */
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SDL_Log("Available audio drivers:");
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for (i = 0; i < SDL_GetNumAudioDrivers(); ++i) {
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SDL_Log("%i: %s", i, SDL_GetAudioDriver(i));
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}
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SDL_Log("Using audio driver: %s\n", SDL_GetCurrentAudioDriver());
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open_audio();
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SDL_FlushEvents(SDL_AUDIODEVICEADDED, SDL_AUDIODEVICEREMOVED);
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#ifdef __EMSCRIPTEN__
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emscripten_set_main_loop(loop, 0, 1);
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#else
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while (!done) {
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SDL_Event event;
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while (SDL_PollEvent(&event) > 0) {
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if (event.type == SDL_QUIT) {
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done = 1;
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}
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if (event.type == SDL_AUDIODEVICEADDED ||
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(event.type == SDL_AUDIODEVICEREMOVED && event.adevice.iscapture && event.adevice.which == capture) ||
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(event.type == SDL_AUDIODEVICEREMOVED && !event.adevice.iscapture && event.adevice.which == device)) {
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reopen_audio();
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}
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}
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SDL_Delay(100);
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}
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#endif
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/* Clean up on signal */
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close_audio();
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SDL_Quit();
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return (0);
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}
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/* vi: set ts=4 sw=4 expandtab: */
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