Added an audio recording test program
diff --git a/test/Makefile.in b/test/Makefile.in
index 68f0d3d..f92c936 100644
--- a/test/Makefile.in
+++ b/test/Makefile.in
@@ -9,6 +9,7 @@
TARGETS = \
checkkeys$(EXE) \
+ loopbackaudio$(EXE) \
loopwave$(EXE) \
loopwavequeue$(EXE) \
testatomic$(EXE) \
@@ -75,6 +76,9 @@
checkkeys$(EXE): $(srcdir)/checkkeys.c
$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
+loopbackaudio$(EXE): $(srcdir)/loopbackaudio.c
+ $(CC) -o $@ $^ $(CFLAGS) $(LIBS)
+
loopwave$(EXE): $(srcdir)/loopwave.c
$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
diff --git a/test/README b/test/README
index f6282be..8464219 100644
--- a/test/README
+++ b/test/README
@@ -2,6 +2,7 @@
These are test programs for the SDL library:
checkkeys Watch the key events to check the keyboard
+ loopbackaudio Audio test -- record from the microphone and play it back immediately
loopwave Audio test -- loop playing a WAV file
loopwavequeue Audio test -- loop playing a WAV file with SDL_QueueAudio
testaudioinfo Lists audio device capabilities
diff --git a/test/loopbackaudio.c b/test/loopbackaudio.c
new file mode 100644
index 0000000..11ba1a3
--- /dev/null
+++ b/test/loopbackaudio.c
@@ -0,0 +1,166 @@
+/*
+ Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely.
+*/
+
+/* Program to record audio from the microphone and play it back immediately */
+
+#include "SDL_config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#if HAVE_SIGNAL_H
+#include <signal.h>
+#endif
+
+#ifdef __EMSCRIPTEN__
+#include <emscripten/emscripten.h>
+#endif
+
+#include "SDL.h"
+
+static SDL_AudioDeviceID device;
+static SDL_AudioDeviceID capture;
+
+static void SDLCALL
+fillerup(void *unused, Uint8 * stream, int len)
+{
+ SDL_QueueAudio(device, stream, len);
+}
+
+/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
+static void
+quit(int rc)
+{
+ SDL_Quit();
+ exit(rc);
+}
+
+static void
+close_audio()
+{
+ if (capture != 0) {
+ SDL_CloseAudioDevice(capture);
+ capture = 0;
+ }
+ if (device != 0) {
+ SDL_CloseAudioDevice(device);
+ device = 0;
+ }
+}
+
+static void
+open_audio()
+{
+ SDL_AudioSpec spec;
+
+ SDL_zero(spec);
+ spec.freq = 44100;
+ spec.format = AUDIO_S16;
+ spec.channels = 1;
+ spec.samples = 1024;
+ spec.callback = fillerup;
+
+ capture = SDL_OpenAudioDevice(NULL, SDL_TRUE, &spec, &spec, SDL_AUDIO_ALLOW_ANY_CHANGE);
+ if (!capture) {
+ SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't open microphone: %s\n", SDL_GetError());
+ quit(2);
+ }
+
+ spec.callback = NULL;
+
+ device = SDL_OpenAudioDevice(NULL, SDL_FALSE, &spec, NULL, 0);
+ if (!device) {
+ SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't open audio: %s\n", SDL_GetError());
+ quit(2);
+ }
+
+ /* Let the audio run */
+ SDL_PauseAudioDevice(capture, SDL_FALSE);
+ SDL_PauseAudioDevice(device, SDL_FALSE);
+}
+
+static void reopen_audio()
+{
+ close_audio();
+ open_audio();
+}
+
+
+static int done = 0;
+void
+poked(int sig)
+{
+ done = 1;
+}
+
+#ifdef __EMSCRIPTEN__
+void
+loop()
+{
+ if(done || (SDL_GetAudioDeviceStatus(capture) != SDL_AUDIO_PLAYING) || (SDL_GetAudioDeviceStatus(device) != SDL_AUDIO_PLAYING))
+ emscripten_cancel_main_loop();
+}
+#endif
+
+int
+main(int argc, char *argv[])
+{
+ int i;
+
+ /* Enable standard application logging */
+ SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
+
+ /* Load the SDL library */
+ if (SDL_Init(SDL_INIT_AUDIO|SDL_INIT_EVENTS) < 0) {
+ SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
+ return (1);
+ }
+
+ /* Show the list of available drivers */
+ SDL_Log("Available audio drivers:");
+ for (i = 0; i < SDL_GetNumAudioDrivers(); ++i) {
+ SDL_Log("%i: %s", i, SDL_GetAudioDriver(i));
+ }
+
+ SDL_Log("Using audio driver: %s\n", SDL_GetCurrentAudioDriver());
+
+ open_audio();
+
+ SDL_FlushEvents(SDL_AUDIODEVICEADDED, SDL_AUDIODEVICEREMOVED);
+
+#ifdef __EMSCRIPTEN__
+ emscripten_set_main_loop(loop, 0, 1);
+#else
+ while (!done) {
+ SDL_Event event;
+
+ while (SDL_PollEvent(&event) > 0) {
+ if (event.type == SDL_QUIT) {
+ done = 1;
+ }
+ if (event.type == SDL_AUDIODEVICEADDED ||
+ (event.type == SDL_AUDIODEVICEREMOVED && event.adevice.iscapture && event.adevice.which == capture) ||
+ (event.type == SDL_AUDIODEVICEREMOVED && !event.adevice.iscapture && event.adevice.which == device)) {
+ reopen_audio();
+ }
+ }
+ SDL_Delay(100);
+ }
+#endif
+
+ /* Clean up on signal */
+ close_audio();
+ SDL_Quit();
+ return (0);
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
