1 files changed, 195 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libgme/hes_emu.h b/lib/rbcodec/codecs/libgme/hes_emu.h
new file mode 100644
index 0000000000..a1dd048498
--- /dev/null
+++ b/lib/rbcodec/codecs/libgme/hes_emu.h
@@ -0,0 +1,195 @@
+// TurboGrafx-16/PC Engine HES music file emulator
+
+// Game_Music_Emu 0.5.2
+#ifndef HES_EMU_H
+#define HES_EMU_H
+
+#include "blargg_source.h"
+
+#include "multi_buffer.h"
+#include "rom_data.h"
+#include "hes_apu.h"
+#include "hes_apu_adpcm.h"
+#include "hes_cpu.h"
+#include "m3u_playlist.h"
+#include "track_filter.h"
+
+// HES file header
+enum { info_offset = 0x20 };
+enum { header_size = 0x20 };
+struct header_t
+{
+        byte tag       [4];
+        byte vers;
+        byte first_track;
+        byte init_addr [2];
+        byte banks     [8];
+        byte data_tag  [4];
+        byte size      [4];
+        byte addr      [4];
+        byte unused    [4];
+};
+
+
+struct timer_t {
+        hes_time_t last_time;
+        int        count;
+        int        load;
+        int        raw_load;
+        byte       enabled;
+        byte       fired;
+};
+        
+struct vdp_t {
+        hes_time_t next_vbl;
+        byte       latch;
+        byte       control;
+};
+        
+struct irq_t {
+        hes_time_t timer;
+        hes_time_t vdp;
+        byte       disables;
+};
+
+struct Hes_Emu {
+        hes_time_t play_period;
+        int timer_base;
+        
+        struct timer_t timer;
+        struct vdp_t   vdp;
+        struct irq_t   irq;
+        
+        // Sound
+        int clock_rate_;
+        int sample_rate_;
+        unsigned buf_changed_count;
+        int voice_count_;
+        int const* voice_types_;
+        int mute_mask_;
+        int tempo_;
+        int gain_;
+        
+        // track-specific
+        byte track_count;
+        int current_track_;
+        
+        // Larger files at the end
+        // Header for currently loaded file
+        struct header_t header;
+        
+        // M3u Playlist
+        struct M3u_Playlist m3u;
+        
+        struct setup_t tfilter;
+        struct Track_Filter track_filter;
+        
+        // Hes Cpu
+        struct Hes_Cpu cpu;
+        struct Rom_Data rom;
+        
+        struct Hes_Apu apu;
+        struct Hes_Apu_Adpcm adpcm;
+
+        struct Multi_Buffer stereo_buf;
+        
+        // rom & ram
+        byte*   write_pages [page_count + 1]; // 0 if unmapped or I/O space     
+        byte    ram [page_size];
+        byte    sgx [3 * page_size + cpu_padding];
+};
+
+
+// Basic functionality
+// Initializes Hes_Emu structure
+void Hes_init( struct Hes_Emu* this );
+
+// Stops (clear) Hes_Emu structure
+void Hes_stop( struct Hes_Emu* this );
+
+// Loads a file from memory
+blargg_err_t Hes_load_mem( struct Hes_Emu* this, void* data, long size );
+
+// Set output sample rate. Must be called only once before loading file.
+blargg_err_t Hes_set_sample_rate( struct Hes_Emu* this, int sample_rate );
+
+// Start a track, where 0 is the first track. Also clears warning string.
+blargg_err_t Hes_start_track( struct Hes_Emu* this, int );
+
+// Generate 'count' samples info 'buf'. Output is in stereo. Any emulation
+// errors set warning string, and major errors also end track.
+blargg_err_t Hes_play( struct Hes_Emu* this, int count, sample_t* buf );
+
+// Track status/control
+// Number of milliseconds (1000 msec = 1 second) played since ning of track
+int Track_tell( struct Hes_Emu* this );
+
+// Seek to new time in track. Seeking backwards or far forward can take a while.
+blargg_err_t Track_seek( struct Hes_Emu* this, int msec );
+
+// Skip n samples
+blargg_err_t Track_skip( struct Hes_Emu* this, int n );
+
+// Set start time and length of track fade out. Once fade ends track_ended() returns
+// true. Fade time can be changed while track is playing.
+void Track_set_fade( struct Hes_Emu* this, int start_msec, int length_msec );
+
+// True if a track has reached its end
+static inline bool Track_ended( struct Hes_Emu* this )
+{
+        return track_ended( &this->track_filter );
+}
+
+// Disables automatic end-of-track detection and skipping of silence at beginning
+static inline void Track_ignore_silence( struct Hes_Emu* this, bool disable )
+{
+        this->track_filter.silence_ignored_ = disable;
+}
+
+// Get track length in milliseconds
+static inline int Track_get_length( struct Hes_Emu* this, int n )
+{
+        int length = 120 * 1000;  /* 2 minutes */ 
+        if ( (this->m3u.size > 0) && (n < this->m3u.size) ) {
+                struct entry_t* entry = &this->m3u.entries [n];
+                length = entry->length;
+        } 
+        
+        return length;
+}
+
+
+// Sound customization
+// Adjust song tempo, where 1.0 = normal, 0.5 = half speed, 2.0 = double speed.
+// Track length as returned by track_info() assumes a tempo of 1.0.
+void Sound_set_tempo( struct Hes_Emu* this, int );
+
+// Mute/unmute voice i, where voice 0 is first voice
+void Sound_mute_voice( struct Hes_Emu* this, int index, bool mute );
+
+// Set muting state of all voices at once using a bit mask, where -1 mutes them all,
+// 0 unmutes them all, 0x01 mutes just the first voice, etc.
+void Sound_mute_voices( struct Hes_Emu* this, int mask );
+
+// Change overall output amplitude, where 1.0 results in minimal clamping.
+// Must be called before set_sample_rate().
+static inline void Sound_set_gain( struct Hes_Emu* this, int g )
+{
+        assert( !this->sample_rate_ ); // you must set gain before setting sample rate
+        this->gain_ = g;
+}
+
+// Emulation (You shouldn't touch these)
+
+void irq_changed( struct Hes_Emu* this );
+void run_until( struct Hes_Emu* this, hes_time_t );
+bool run_cpu( struct Hes_Emu* this, hes_time_t end );
+int  read_mem_( struct Hes_Emu* this, hes_addr_t );
+int  read_mem( struct Hes_Emu* this, hes_addr_t );
+void write_mem_( struct Hes_Emu* this, hes_addr_t, int data );
+void write_mem( struct Hes_Emu* this, hes_addr_t, int );
+void write_vdp( struct Hes_Emu* this, int addr, int data );
+void set_mmr( struct Hes_Emu* this, int reg, int bank );
+int  cpu_done( struct Hes_Emu* this );
+
+#endif