1 files changed, 68 insertions, 0 deletions

diff --git a/apps/codecs/libgme/resampler.h b/apps/codecs/libgme/resampler.h
new file mode 100644
index 0000000000..f5e8c55119
--- /dev/null
+++ b/apps/codecs/libgme/resampler.h
@@ -0,0 +1,68 @@
+// 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_config.h"
+#include "multi_buffer.h"
+
+typedef short dsample_t;
+
+enum { stereo = 2 };
+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;
+        
+        dsample_t sample_buf [max_buf_size];
+        int sample_buf_size;
+        int oversamples_per_frame;
+        int buf_pos;
+        int resampler_size;
+        int gain_;
+        
+        // Internal resampler
+        dsample_t buf [max_resampler_size];
+        int buffer_size;
+        
+        int write_pos;
+        double rate_;
+        
+        int pos;
+        int step;
+};
+
+static inline void Resampler_init( struct Resampler* this )
+{
+        this->pos = 0;
+        this->write_pos = 0;
+        this->rate_     = 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, long count, dsample_t* out, struct Stereo_Buffer* ) ICODE_ATTR;
+
+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, double oversample, double rolloff, double gain );
+
+static inline void Resampler_clear( struct Resampler* this )
+{
+        this->buf_pos = this->sample_buf_size;
+
+        this->pos = 0;
+        this->write_pos = 0;
+}
+
+#endif