1 files changed, 71 insertions, 0 deletions
diff --git a/cmds/stagefright/WaveWriter.h b/cmds/stagefright/WaveWriter.h
new file mode 100644
index 0000000..a0eb66e
--- /dev/null
+++ b/cmds/stagefright/WaveWriter.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef ANDROID_WAVEWRITER_H_
+
+#define ANDROID_WAVEWRITER_H_
+
+namespace android {
+
+class WaveWriter {
+public:
+    WaveWriter(const char *filename,
+               uint16_t num_channels, uint32_t sampling_rate)
+        : mFile(fopen(filename, "wb")),
+          mTotalBytes(0) {
+        fwrite("RIFFxxxxWAVEfmt \x10\x00\x00\x00\x01\x00", 1, 22, mFile); 
+        write_u16(num_channels);
+        write_u32(sampling_rate);
+        write_u32(sampling_rate * num_channels * 2);
+        write_u16(num_channels * 2);
+        write_u16(16);
+        fwrite("dataxxxx", 1, 8, mFile);
+    }
+
+    ~WaveWriter() {
+        fseek(mFile, 40, SEEK_SET);
+        write_u32(mTotalBytes);
+
+        fseek(mFile, 4, SEEK_SET);
+        write_u32(36 + mTotalBytes);
+
+        fclose(mFile);
+        mFile = NULL;
+    }
+
+    void Append(const void *data, size_t size) {
+        fwrite(data, 1, size, mFile);
+        mTotalBytes += size;
+    }
+
+private:
+    void write_u16(uint16_t x) {
+        fputc(x & 0xff, mFile);
+        fputc(x >> 8, mFile);
+    }
+
+    void write_u32(uint32_t x) {
+        write_u16(x & 0xffff);
+        write_u16(x >> 16);
+    }
+
+    FILE *mFile;
+    size_t mTotalBytes;
+};
+
+}  // namespace android
+
+#endif  // ANDROID_WAVEWRITER_H_