copied from make_wav

afsk/make_wav.h

@@ -0,0 +1,96 @@
+/* make_wav.h
+ * Fri Jun 18 17:06:02 PDT 2010 Kevin Karplus
+ */
+ 
+#ifndef MAKE_WAV_H
+#define MAKE_WAV_H
+ 
+void write_wav(char * filename, unsigned long num_samples, short int * data, int s_rate);
+    /* open a file named filename, write signed 16-bit values as a
+        monoaural WAV file at the specified sampling rate
+        and close the file
+    */
+ 
+#endif
+
+/*
+ * TelemEncoding.h
+ *
+ *  Created on: Feb 3, 2014
+ *      Author: fox
+ */
+
+#ifndef TELEMENCODING_H_
+#define TELEMENCODING_H_
+
+void update_rs(
+   unsigned char parity[32], // 32-byte encoder state; zero before each frame
+   unsigned char c          // Current data byte to update
+);
+
+int encode_8b10b(
+    int32_t *state, // pointer to encoder state (run disparity, RD)
+    int32_t data);
+
+#define CHARACTER_BITS 10
+#define CHARACTERS_PER_LONGWORD 3
+#define CHARACTER_MASK ((1<<CHARACTER_BITS)-1)
+#define SYNC_CHARACTER -1
+
+extern int maxNewBuffer,maxOldBuffer;
+#if 1
+static void inline Put10bInBuffer(
+		uint32_t *bufferBase,
+		int index,
+		uint16_t data)
+{
+	/*
+	 * We are going to put 3 10-bit data items (we'll call them characters) into each
+	 * 32-bit word in the buffer with
+	 * two bits left over at the most significant end.
+	 */
+	int bufferIndex = index/CHARACTERS_PER_LONGWORD; /* Which 32-bit word?*/
+	int position = (index%CHARACTERS_PER_LONGWORD)*CHARACTER_BITS;    /* Which position within the 32 bits? */
+	if(position == 0)bufferBase[bufferIndex] = 0; /* Initialize the 3-character buffer */
+	bufferBase[bufferIndex] |= data << position;
+	if(bufferIndex > maxNewBuffer)maxNewBuffer = bufferIndex;
+	if(index > maxOldBuffer)maxOldBuffer = index;
+}
+
+static uint16_t inline Get10bFromBuffer(
+		uint32_t *bufferBase,
+		int index)
+{
+	int bufferIndex = index/CHARACTERS_PER_LONGWORD; /* Which 32-bit word?*/
+	int position = (index%CHARACTERS_PER_LONGWORD)*CHARACTER_BITS;    /* Which position within the 32 bits? */
+	uint16_t retChar;
+	retChar = (bufferBase[bufferIndex]>>position) & CHARACTER_MASK;
+	return retChar;
+
+}
+#else
+static void inline Put10bInBuffer(
+		uint32_t *bufferBase,
+		int index,
+		uint16_t data)
+{
+	uint16_t *buffer = (uint16_t *)bufferBase;
+	buffer[index] = data;
+	if(index > maxOldBuffer)maxOldBuffer = index;
+}
+
+static uint16_t inline Get10bFromBuffer(
+		uint32_t *bufferBase,
+		int index)
+{
+	uint16_t *buffer = (uint16_t *)bufferBase;
+	return buffer[index];
+}
+#endif
+
+
+#define PARITY_BYTES_PER_CODEWORD 32U     // Number of parity symbols in frame
+#define NP 32U //For Phil's code
+#define DATA_BYTES_PER_CODE_WORD 223
+
+#endif /* TELEMENCODING_H_ */