Remove all external dependencies and md380 vocoder

mbe/decoder_api.cpp

@@ -0,0 +1,47 @@
+// The decoder half of the C API (include/halfrate.h).
+#include <cstring>
+#include <new>
+
+#include "fec.h"
+#include "frame.h"
+#include "decoder.h"
+#include "halfrate.h"
+
+struct hr_decoder {
+	halfrate::dec::Decoder decoder;
+};
+
+extern "C" {
+
+hr_decoder* hr_decoder_new(void) { return new (std::nothrow) hr_decoder(); }
+
+void hr_decoder_free(hr_decoder* d) { delete d; }
+
+int hr_decoder_set(hr_decoder* d, const char* name, double value) {
+	if (!d || !name) return -1;
+	return d->decoder.set(name, value) ? 0 : -1;
+}
+
+int hr_decode(hr_decoder* d, const uint8_t* frame, int16_t* pcm) {
+	if (!pcm) return -1;
+	if (!d) {
+		std::memset(pcm, 0, HR_SAMPLES * sizeof(int16_t));
+		return -1;
+	}
+	if (!frame) {
+		d->decoder.decode_erased(pcm);
+		return HR_ERASURE;
+	}
+	uint8_t bits[HR_BITS];
+	halfrate::core::bits_from_bytes(frame, bits);
+	return static_cast<int>(d->decoder.decode_bits(bits, pcm));
+}
+
+int hr_decode_air(hr_decoder* d, const uint8_t* air, int16_t* pcm) {
+	if (!d || !air) return hr_decode(d, nullptr, pcm);
+	uint8_t frame[HR_FRAME_BYTES];
+	halfrate::core::fec_decode_frame(air, frame, nullptr);
+	return hr_decode(d, frame, pcm);
+}
+
+}  // extern "C"