1 files changed, 75 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libgme/resampler.h b/lib/rbcodec/codecs/libgme/resampler.h
new file mode 100644
index 0000000000..3f3710a54a
--- /dev/null
+++ b/lib/rbcodec/codecs/libgme/resampler.h
@@ -0,0 +1,75 @@
+// Combination of Downsampler and Blip_Buffer mixing. Used by Sega FM emulators.
+
+// Game_Music_Emu 0.5.5
+#ifndef RESAMPLER_H
+#define RESAMPLER_H
+
+#include "blargg_common.h"
+#include "multi_buffer.h"
+
+typedef short dsample_t;
+
+enum { max_buf_size = 3960 };
+enum { max_resampler_size = 5942 };
+enum { write_offset = 8 * stereo };
+enum { gain_bits = 14 };
+
+struct Resampler {
+    int (*callback)( void*, blip_time_t, int, dsample_t* );
+    void* callback_data;
+
+    int sample_buffer_size;
+    int sample_buf_size;
+    int oversamples_per_frame;
+    int buf_pos;
+    int resampler_size;
+    int gain_;
+
+    int buffer_size;
+    int write_pos;
+
+    int pos;
+    int step;
+
+    int rate_;
+
+    dsample_t sample_buf [max_buf_size];
+    dsample_t buf [max_resampler_size];   // Internal resampler
+};
+
+static inline void Resampler_init( struct Resampler* this )
+{
+    this->pos = 0;
+    this->write_pos = 0;
+    this->rate_     = 0;
+    this->sample_buf_size = 0;
+    this->sample_buffer_size = 0;
+    this->oversamples_per_frame = 0;
+}
+
+blargg_err_t Resampler_reset( struct Resampler* this, int max_pairs );
+void Resampler_resize( struct Resampler* this, int pairs_per_frame );
+void Resampler_play( struct Resampler* this, int count, dsample_t* out, struct Blip_Buffer* );
+
+static inline void Resampler_set_callback(struct Resampler* this, int (*func)( void*, blip_time_t, int, dsample_t* ), void* user_data )
+{
+    this->callback = func;
+    this->callback_data = user_data;
+}
+
+blargg_err_t Resampler_setup( struct Resampler* this, int fm_rate, int fm_gain, int rate, int gain );
+
+static inline void Resampler_clear( struct Resampler* this )
+{
+    this->buf_pos = this->sample_buf_size;
+
+    this->pos = 0;
+    this->write_pos = 0;
+}
+
+static inline int Resampler_rate( struct Resampler* this )
+{
+    return this->rate_;
+}
+
+#endif