From 467338ee01565234762db8077c067df42c3b40a8 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Thu, 12 Nov 2026 13:16:00 -0800
Subject: Add audio, overhaul makefiles

Adds simple audio support to Simple
Overhaul makefiles; remove common boilerplate; make them more uniform
---
 chapter31/src/test/c/audio_test.c | 48 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 chapter31/src/test/c/audio_test.c

(limited to 'chapter31/src/test/c')

diff --git a/chapter31/src/test/c/audio_test.c b/chapter31/src/test/c/audio_test.c
new file mode 100644
index 00000000..f82504c3
--- /dev/null
+++ b/chapter31/src/test/c/audio_test.c
@@ -0,0 +1,48 @@
+// Explicit optional integration checks: real miniaudio thread, silent device.
+#define SIMPLE_AUDIO_TEST_NULL
+#include "../../main/c/simple_miniaudio.c"
+#include <assert.h>
+
+int main(void) {
+    assert(api.play(1)==-1 && api.playing()==0);
+    assert(api.stop()==0);
+    api.close();
+    for (int pass=0;pass<2;++pass) {
+        assert(api.open()==0 && api.open()==0);
+        assert(api.load(NULL,1)==-1);
+        int16_t pcm[RATE]={0};
+        assert(api.load(pcm,0)==-1 && api.load(pcm,RATE*10+1)==-1);
+        int sound=api.load(pcm,RATE);
+        assert(sound==4);
+        pcm[0]=12345;
+        assert(sounds[sound].pcm[0]==0);
+        assert(api.play(-1)==-1 && api.play(0)==-1 && api.play(SLOTS)==-1);
+        assert(api.play(sound)==0 && api.playing());
+        // A one-second sound returns while playback is still in progress.
+        assert(api.stop()==0 && !api.playing());
+        for (int cue=1;cue<=3;++cue) {
+            assert(api.play(cue)==0);
+            int elapsed=0;
+            while (api.playing() && elapsed<2000) { ma_sleep(10); elapsed+=10; }
+            assert(!api.playing());
+        }
+        for (int i=5;i<SLOTS;++i) assert(api.load(pcm,1)==i);
+        assert(api.load(pcm,1)==-1);
+        assert(api.play(sound)==0);
+        api.close(); // Join during playback, then reopen next pass.
+        api.close();
+        assert(api.play(sound)==-1 && !api.playing());
+    }
+    // The loss cue reverses exactly the same three softly enveloped notes.
+    assert(tone(1,0)==0 && tone(2,0)==0 && tone(3,1)==0);
+    uint32_t note=RATE*16/100;
+    for (int n=0;n<3;++n)
+        assert(memcmp(sounds[2].pcm+n*note,sounds[3].pcm+(2-n)*note,note*sizeof(int16_t))==0);
+    for (int i=1;i<=3;++i) {
+        assert(sounds[i].pcm[0]==0);
+        for (uint32_t j=0;j<sounds[i].count;++j) assert(abs(sounds[i].pcm[j])<=3200);
+        free(sounds[i].pcm); sounds[i].pcm=NULL;
+    }
+    puts("audio native checks passed");
+    return 0;
+}
-- 
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