From 3c7cf636a4b11b030dd0b76dd2cd218afbccfff5 Mon Sep 17 00:00:00 2001
From: slederer <dev@insignificance.de>
Date: Mon, 13 Oct 2025 00:47:41 +0200
Subject: [PATCH] utils: add audio conversion script, update image creation

---
 utils/tdrimg.py    |  5 +++++
 utils/wav2tdrau.py | 29 +++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)
 create mode 100644 utils/wav2tdrau.py

diff --git a/utils/tdrimg.py b/utils/tdrimg.py
index be93ed9..b7ce4cb 100644
--- a/utils/tdrimg.py
+++ b/utils/tdrimg.py
@@ -538,6 +538,9 @@ def create_image_with_stuff(imgfile):
     slotnr = putfile("../progs/recover.prog", None , f, part, partstart, slotnr)
     slotnr = putfile("../progs/changemem.prog", None , f, part, partstart, slotnr)
 
+    slotnr = putfile("../lib/pcmaudio.s", None , f, part, partstart, slotnr)
+    slotnr = putfile("../lib/pcmaudio.inc", None , f, part, partstart, slotnr)
+
     listdir(f, part)
 
     # third partition
@@ -600,6 +603,8 @@ def create_image_with_stuff(imgfile):
 
     slotnr = putfile("../examples/lines.pas", None , f, part, partstart, slotnr)
 
+    slotnr = putfile("../examples/pcmtest2.pas", None , f, part, partstart, slotnr)
+
     slotnr = putfile("../examples/pictviewer.pas", None , f, part, partstart, slotnr)
     slotnr = putfile("../examples/Toco_Toucan.pict", None , f, part, partstart, slotnr)
     slotnr = putfile("../examples/shinkansen.pict", None , f, part, partstart, slotnr)
diff --git a/utils/wav2tdrau.py b/utils/wav2tdrau.py
new file mode 100644
index 0000000..16230d6
--- /dev/null
+++ b/utils/wav2tdrau.py
@@ -0,0 +1,29 @@
+import sys
+import random, struct
+import wave
+
+freq = 16000
+BIAS = 32768
+def convert(srcpath, destpath):
+	outdata = bytearray()
+	with wave.open(srcpath, mode="rb") as f:
+		params = f.getparams()
+		print(params.nchannels, params.sampwidth, params.framerate)
+
+		frames = f.readframes(2*1024*1024)
+		for i in range(0, len(frames), 2):
+			v = int.from_bytes(frames[i:i+2], "little", signed=True)
+			v += BIAS
+			hi = (v & 0xFF00) >> 8
+			lo = (v & 0x00FF)
+			outdata.append(hi)
+			outdata.append(lo)
+
+	with open(destpath, mode="wb") as f:
+		f.write(outdata)
+
+
+if __name__ == "__main__":
+	sourcefilename = sys.argv[1]
+	destfilename = sys.argv[2]
+	convert(sourcefilename, destfilename)