1 files changed, 72 insertions, 0 deletions

diff --git a/apps/codecs/libgme/multi_buffer.h b/apps/codecs/libgme/multi_buffer.h
new file mode 100644
index 0000000000..26f302380c
--- /dev/null
+++ b/apps/codecs/libgme/multi_buffer.h
@@ -0,0 +1,72 @@
+// Multi-channel sound buffer interface, and basic mono and stereo buffers
+
+// Blip_Buffer 0.4.1
+#ifndef MULTI_BUFFER_H
+#define MULTI_BUFFER_H
+
+#include "blargg_common.h"
+#include "blip_buffer.h"
+
+// Get indexed channel, from 0 to channel count - 1
+struct channel_t {
+        struct Blip_Buffer* center;
+        struct Blip_Buffer* left;
+        struct Blip_Buffer* right;
+};
+
+enum { type_index_mask = 0xFF };
+enum { wave_type = 0x100, noise_type = 0x200, mixed_type = wave_type | noise_type };
+enum { buf_count = 3 };
+        
+struct Stereo_Buffer {
+        struct Blip_Buffer bufs [buf_count];
+        struct channel_t chan;
+        int stereo_added;
+        int was_stereo;
+        
+        unsigned channels_changed_count_;
+        long sample_rate_;
+        int length_;
+        int samples_per_frame_;
+};
+
+// Initializes Stereo_Buffer structure
+void Buffer_init( struct Stereo_Buffer* this );
+
+blargg_err_t Buffer_set_sample_rate( struct Stereo_Buffer* this, long, int msec );
+void Buffer_clock_rate( struct Stereo_Buffer* this, long );
+void Buffer_bass_freq( struct Stereo_Buffer* this, int );
+void Buffer_clear( struct Stereo_Buffer* this );
+struct channel_t Buffer_channel( struct Stereo_Buffer* this );
+void Buffer_end_frame( struct Stereo_Buffer* this, blip_time_t ) ICODE_ATTR;
+
+long Buffer_read_samples( struct Stereo_Buffer* this, blip_sample_t*, long ) ICODE_ATTR;
+
+// Count of changes to channel configuration. Incremented whenever
+// a change is made to any of the Blip_Buffers for any channel.
+unsigned Buffer_channels_changed_count( struct Stereo_Buffer* this ) ICODE_ATTR;
+void Buffer_channels_changed( struct Stereo_Buffer* this ) ICODE_ATTR;
+
+void Buffer_mix_stereo_no_center( struct Stereo_Buffer* this, blip_sample_t*, blargg_long ) ICODE_ATTR;
+void Buffer_mix_stereo( struct Stereo_Buffer* this, blip_sample_t*, blargg_long ) ICODE_ATTR;
+void Buffer_mix_mono( struct Stereo_Buffer* this, blip_sample_t*, blargg_long ) ICODE_ATTR;
+
+// Number of samples per output frame (1 = mono, 2 = stereo)
+static inline int Buffer_samples_per_frame( struct Stereo_Buffer* this )
+{
+        return this->samples_per_frame_;
+}
+
+// See Blip_Buffer.h
+static inline long Buffer_sample_rate( struct Stereo_Buffer* this )
+{
+        return this->sample_rate_;
+}
+
+// Length of buffer, in milliseconds
+static inline int Buffer_length( struct Stereo_Buffer* this )
+{
+        return this->length_;
+}
+
+#endif