From 20d28e80a5c861a9d5f449ea911ab75b4f37ad0d Mon Sep 17 00:00:00 2001
From: Jef <jef@targetspot.com>
Date: Tue, 24 Sep 2024 14:54:57 +0200
Subject: Initial community commit

---
 Src/Plugins/Encoder/enc_wav/WAVEncoder.cpp | 72 ++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 Src/Plugins/Encoder/enc_wav/WAVEncoder.cpp

(limited to 'Src/Plugins/Encoder/enc_wav/WAVEncoder.cpp')

diff --git a/Src/Plugins/Encoder/enc_wav/WAVEncoder.cpp b/Src/Plugins/Encoder/enc_wav/WAVEncoder.cpp
new file mode 100644
index 00000000..374bbf65
--- /dev/null
+++ b/Src/Plugins/Encoder/enc_wav/WAVEncoder.cpp
@@ -0,0 +1,72 @@
+#include "WAVEncoder.h"
+
+#define rev32(X) ((((DWORD)(X)&0xFF)<<24)|(((DWORD)(X)&0xFF00)<<8)|(((DWORD)(X)&0xFF0000)>>8)|(((DWORD)(X)&0xFF000000)>>24))
+
+WAVEncoder::WAVEncoder(int nch, int srate, int bps, ACMConfig *config)
+{
+	numBytes = 0;
+
+	inputFormat.wFormatTag = WAVE_FORMAT_PCM;
+	inputFormat.nChannels = nch;
+	inputFormat.nSamplesPerSec = srate;
+	inputFormat.nAvgBytesPerSec = 	srate * nch * (bps >> 3);
+	inputFormat.nBlockAlign = nch * (bps >> 3);
+	inputFormat.wBitsPerSample	= bps;
+	inputFormat.cbSize = 0;
+
+	do_header = config->header;
+	if (do_header)
+	first = 44;
+}
+
+int WAVEncoder::Encode(int framepos, void *in, int in_avail, int *in_used, void *out, int out_avail)
+{
+	if (first)
+	{
+		int valid = min(first, out_avail);
+		first -= valid;
+		*in_used = 0;
+		return valid;
+	}
+
+	int valid = min(in_avail, out_avail);
+
+	memcpy(out, in, valid);
+	*in_used = valid;
+	numBytes += valid;
+
+	return valid;
+}
+
+void WAVEncoder::PrepareToFinish()
+{}
+
+void WAVEncoder::FinishAudio(const wchar_t *filename)
+{
+	if (!do_header) return;
+	// open old file
+	HANDLE tempfile = CreateFileW(filename, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);
+
+	if (tempfile)
+	{
+		// rewrite initial 44 bytes
+		DWORD bw = 0;
+		unsigned __int32 t;
+		t = rev32('RIFF');
+		WriteFile(tempfile, &t, 4, &bw, 0); // RIFF (4 bytes)
+		t = (unsigned __int32)numBytes + 36;
+		bw = 0;WriteFile(tempfile, &t, 4, &bw, 0); // size of chunk (4 bytes)
+		t = rev32('WAVE');
+		bw = 0;WriteFile(tempfile, &t, 4, &bw, 0); // WAVE (4 bytes)
+		t = rev32('fmt ');
+		bw = 0;WriteFile(tempfile, &t, 4, &bw, 0);// fmt  (4 bytes)
+		t = 16;
+		bw = 0;WriteFile(tempfile, &t, 4, &bw, 0);// size of chunk (4 bytes)
+		bw = 0;WriteFile(tempfile, &inputFormat, 16, &bw, 0); // write WAVEFORMAT out (16 bytes)
+		t = rev32('data');
+		bw = 0;WriteFile(tempfile, &t, 4, &bw, 0);// data  (4 bytes)
+		bw = 0;WriteFile(tempfile, &numBytes, 4, &bw, 0);// size of chunk (4 bytes)
+
+		CloseHandle(tempfile);
+	}
+}
\ No newline at end of file
-- 
cgit