1 files changed, 87 insertions, 0 deletions
diff --git a/test/wav.cpp b/test/wav.cpp
new file mode 100644
index 0000000..fb3f015
--- /dev/null
+++ b/test/wav.cpp
@@ -0,0 +1,87 @@
+/* ------------------------------------------------------------------
+ * Copyright (C) 2009 Martin Storsjo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ * -------------------------------------------------------------------
+ */
+
+#include "wav.h"
+
+void WavWriter::writeString(const char *str) {
+	fputc(str[0], wav);
+	fputc(str[1], wav);
+	fputc(str[2], wav);
+	fputc(str[3], wav);
+}
+
+void WavWriter::writeInt32(int value) {
+	fputc((value >>  0) & 0xff, wav);
+	fputc((value >>  8) & 0xff, wav);
+	fputc((value >> 16) & 0xff, wav);
+	fputc((value >> 24) & 0xff, wav);
+}
+
+void WavWriter::writeInt16(int value) {
+	fputc((value >> 0) & 0xff, wav);
+	fputc((value >> 8) & 0xff, wav);
+}
+
+void WavWriter::writeHeader(int length) {
+	writeString("RIFF");
+	writeInt32(4 + 8 + 16 + 8 + length);
+	writeString("WAVE");
+
+	writeString("fmt ");
+	writeInt32(16);
+
+	int bytesPerFrame = bitsPerSample/8*channels;
+	int bytesPerSec = bytesPerFrame*sampleRate;
+	writeInt16(1);             // Format
+	writeInt16(channels);      // Channels
+	writeInt32(sampleRate);    // Samplerate
+	writeInt32(bytesPerSec);   // Bytes per sec
+	writeInt16(bytesPerFrame); // Bytes per frame
+	writeInt16(bitsPerSample); // Bits per sample
+
+	writeString("data");
+	writeInt32(length);
+}
+
+WavWriter::WavWriter(const char *filename, int sampleRate, int bitsPerSample, int channels) {
+	wav = fopen(filename, "wb");
+	if (wav == NULL)
+		return;
+	dataLength = 0;
+	this->sampleRate = sampleRate;
+	this->bitsPerSample = bitsPerSample;
+	this->channels = channels;
+
+	writeHeader(dataLength);
+}
+
+WavWriter::~WavWriter() {
+	if (wav == NULL)
+		return;
+	fseek(wav, 0, SEEK_SET);
+	writeHeader(dataLength);
+	fclose(wav);
+}
+
+void WavWriter::writeData(const unsigned char* data, int length) {
+	if (wav == NULL)
+		return;
+	fwrite(data, length, 1, wav);
+	dataLength += length;
+}
+