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+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Matthias P. Braendli
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+*/
+
+/* An implementation of a BPSK31 generator.
+ */
+
+#ifndef __PSK_31_H_
+#define __PSK_31_H_
+#include <stdint.h>
+#include <stddef.h>
+
+void psk31_init(unsigned int samplerate);
+
+// Append new psk31 text to transmit
+// PSK31 audio centre frequency in Hz
+// returns 0 on failure, 1 on success
+int psk31_push_message(const char* text, int frequency);
+
+
+// Write the waveform into the buffer (stereo)
+size_t psk31_fill_buffer(int16_t *buf, size_t bufsize);
+
+// Return 1 if the psk31 generator has completed transmission
+int psk31_busy(void);
+
+
+/*
+ * PSK31 Varicode
+ * http://aintel.bi.ehu.es/psk31.html
+ */
+const char *psk31_varicode[] = {
+ "1010101011",
+ "1011011011",
+ "1011101101",
+ "1101110111",
+ "1011101011",
+ "1101011111",
+ "1011101111",
+ "1011111101",
+ "1011111111",
+ "11101111",
+ "11101",
+ "1101101111",
+ "1011011101",
+ "11111",
+ "1101110101",
+ "1110101011",
+ "1011110111",
+ "1011110101",
+ "1110101101",
+ "1110101111",
+ "1101011011",
+ "1101101011",
+ "1101101101",
+ "1101010111",
+ "1101111011",
+ "1101111101",
+ "1110110111",
+ "1101010101",
+ "1101011101",
+ "1110111011",
+ "1011111011",
+ "1101111111",
+ "1",
+ "111111111",
+ "101011111",
+ "111110101",
+ "111011011",
+ "1011010101",
+ "1010111011",
+ "101111111",
+ "11111011",
+ "11110111",
+ "101101111",
+ "111011111",
+ "1110101",
+ "110101",
+ "1010111",
+ "110101111",
+ "10110111",
+ "10111101",
+ "11101101",
+ "11111111",
+ "101110111",
+ "101011011",
+ "101101011",
+ "110101101",
+ "110101011",
+ "110110111",
+ "11110101",
+ "110111101",
+ "111101101",
+ "1010101",
+ "111010111",
+ "1010101111",
+ "1010111101",
+ "1111101",
+ "11101011",
+ "10101101",
+ "10110101",
+ "1110111",
+ "11011011",
+ "11111101",
+ "101010101",
+ "1111111",
+ "111111101",
+ "101111101",
+ "11010111",
+ "10111011",
+ "11011101",
+ "10101011",
+ "11010101",
+ "111011101",
+ "10101111",
+ "1101111",
+ "1101101",
+ "101010111",
+ "110110101",
+ "101011101",
+ "101110101",
+ "101111011",
+ "1010101101",
+ "111110111",
+ "111101111",
+ "111111011",
+ "1010111111",
+ "101101101",
+ "1011011111",
+ "1011",
+ "1011111",
+ "101111",
+ "101101",
+ "11",
+ "111101",
+ "1011011",
+ "101011",
+ "1101",
+ "111101011",
+ "10111111",
+ "11011",
+ "111011",
+ "1111",
+ "111",
+ "111111",
+ "110111111",
+ "10101",
+ "10111",
+ "101",
+ "110111",
+ "1111011",
+ "1101011",
+ "11011111",
+ "1011101",
+ "111010101",
+ "1010110111",
+ "110111011",
+ "1010110101",
+ "1011010111",
+ "1110110101",
+};
+
+#endif // __PSK_31_H_
+