Add libs

1 files changed, 19 insertions, 0 deletions

diff --git a/src/libsamplerate/samplerate.h b/src/libsamplerate/samplerate.h
new file mode 100644
index 0000000..8f8ea87
--- /dev/null
+++ b/src/libsamplerate/samplerate.h
@@ -0,0 +1,19 @@
+#include "../libfilter/iir_filter.h"
+
+typedef struct samplerate {
+	double factor;
+	struct {
+		iir_filter_t lp;
+		sample_t last_sample;
+		double in_index;
+	} down;
+	struct {
+		iir_filter_t lp;
+		sample_t last_sample;
+		double in_index;
+	} up;
+} samplerate_t;
+
+int init_samplerate(samplerate_t *state, double low_samplerate, double high_samplerate, double filter_cutoff);
+int samplerate_downsample(samplerate_t *state, sample_t *samples, int input_num);
+int samplerate_upsample(samplerate_t *state, sample_t *input, int input_num, sample_t *output);