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test: add audio pass-through test with RMS validation

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Co-authored-by: aider (deepseek/deepseek-reasoner) <aider@aider.chat>
This commit is contained in:
Loic Coenen
2026-05-07 20:55:21 +00:00
parent 9d43b15b46
commit 3d9f2af9b3
1 changed files with 67 additions and 0 deletions
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67
tests/integration.c
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@@ -180,6 +180,70 @@ static void test_clock_continue(void) {
}
}
static int test_audio_pass_through(void) {
printf("Test: audio pass‑through (latency & RMS)\n");
/* check required tools */
if (system("which jack_sine >/dev/null 2>&1") != 0) {
fprintf(stderr, " SKIP: jack_sine not installed\n");
return 1;
}
if (system("which jack_capture >/dev/null 2>&1") != 0) {
fprintf(stderr, " SKIP: jack_capture not installed\n");
return 1;
}
if (system("which sox >/dev/null 2>&1") != 0) {
fprintf(stderr, " SKIP: sox not installed\n");
return 1;
}
if (system("which python3 >/dev/null 2>&1") != 0) {
fprintf(stderr, " SKIP: python3 not installed\n");
return 1;
}
pid_t pid = start_looper();
if (pid < 0) {
fprintf(stderr, "FAIL: could not start looper\n");
return 1;
}
/* connect sine generator to looper input */
if (system("jack_connect sine:output looper:input 2>/dev/null") != 0) {
fprintf(stderr, "FAIL: could not connect sine -> looper:input\n");
kill(pid, SIGTERM);
waitpid(pid, NULL, 0);
return 1;
}
/* capture 2 seconds of looper output */
system("jack_capture -d 2 -f /tmp/looper_test.wav 2>/dev/null");
/* compute RMS of captured WAV using Python */
int rms_ok = system(
"python3 -c '"
"import wave, math;"
"w=wave.open(\"/tmp/looper_test.wav\");"
"f=w.readframes(w.getnframes());"
"s=[int.from_bytes(f[i:i+2],\"little\",signed=True) for i in range(0,len(f),2)];"
"r=math.sqrt(sum(x*x for x in s)/len(s));"
"print(\"RMS=%%d\"%%r);"
"exit(0 if r>1000 else 1)'"
" 2>/dev/null"
);
/* clean up */
kill(pid, SIGTERM);
waitpid(pid, NULL, 0);
if (rms_ok == 0) {
printf(" PASS (RMS > 1000)\n");
return 0;
} else {
fprintf(stderr, " FAIL: RMS too low or Python error\n");
return 1;
}
}
int main(void) {
/* 1. binary must exist */
if (system("test -x ./looper") != 0) {
@@ -204,6 +268,9 @@ int main(void) {
test_clock_stop();
test_clock_continue();
/* 5. Audio pass‑through test (optional tools) */
test_audio_pass_through();
printf("All tests passed!\n");
return 0;
}