forked from len0rd/rockbox
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius <nils@rockbox.org> Tested-by: Nils Wallménius <nils@rockbox.org>
This commit is contained in:
Sean Bartell
Nils Wallménius
parent
a0009907de
commit
f40bfc9267
757 changed files with 122 additions and 122 deletions
261
lib/rbcodec/codecs/libgme/nsf_emu.h
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261
lib/rbcodec/codecs/libgme/nsf_emu.h
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// Nintendo NES/Famicom NSF music file emulator
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// Game_Music_Emu 0.5.5
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#ifndef NSF_EMU_H
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#define NSF_EMU_H
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#include "rom_data.h"
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#include "multi_buffer.h"
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#include "nes_apu.h"
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#include "nes_cpu.h"
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#include "nsfe_info.h"
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#include "m3u_playlist.h"
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#include "track_filter.h"
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#ifndef NSF_EMU_APU_ONLY
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#include "nes_namco_apu.h"
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#include "nes_vrc6_apu.h"
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#include "nes_fme7_apu.h"
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#include "nes_fds_apu.h"
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#include "nes_mmc5_apu.h"
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#ifndef NSF_EMU_NO_VRC7
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#include "nes_vrc7_apu.h"
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#endif
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#endif
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// Sound chip flags
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enum {
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vrc6_flag = 1 << 0,
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vrc7_flag = 1 << 1,
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fds_flag = 1 << 2,
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mmc5_flag = 1 << 3,
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namco_flag = 1 << 4,
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fme7_flag = 1 << 5
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};
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enum { fds_banks = 2 };
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enum { bank_count = fds_banks + 8 };
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enum { rom_begin = 0x8000 };
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enum { bank_select_addr = 0x5FF8 };
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enum { mem_size = 0x10000 };
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// cpu sits here when waiting for next call to play routine
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enum { idle_addr = 0x5FF6 };
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enum { banks_addr = idle_addr };
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enum { badop_addr = bank_select_addr };
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enum { low_ram_size = 0x800 };
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enum { sram_size = 0x2000 };
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enum { fdsram_size = 0x6000 };
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enum { fdsram_offset = 0x2000 + page_size + 8 };
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enum { sram_addr = 0x6000 };
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enum { unmapped_size= page_size + 8 };
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enum { max_voices = 32 };
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// NSF file header
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enum { header_size = 0x80 };
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struct header_t
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{
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char tag [5];
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byte vers;
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byte track_count;
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byte first_track;
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byte load_addr [2];
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byte init_addr [2];
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byte play_addr [2];
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char game [32];
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char author [32];
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char copyright [32];
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byte ntsc_speed [2];
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byte banks [8];
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byte pal_speed [2];
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byte speed_flags;
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byte chip_flags;
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byte unused [4];
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};
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struct Nsf_Emu {
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// Play routine timing
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nes_time_t next_play;
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nes_time_t play_period;
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int play_extra;
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int play_delay;
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struct registers_t saved_state; // of interrupted init routine
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// general
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int voice_count;
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int voice_types [32];
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int mute_mask_;
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int tempo;
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int gain;
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int sample_rate;
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// track-specific
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int track_count;
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int current_track;
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int clock_rate__;
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unsigned buf_changed_count;
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// M3u Playlist
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struct M3u_Playlist m3u;
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// Larger items at the end
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#ifndef NSF_EMU_APU_ONLY
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byte mmc5_mul [2];
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struct Nes_Fds_Apu fds;
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struct Nes_Mmc5_Apu mmc5;
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struct Nes_Namco_Apu namco;
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struct Nes_Vrc6_Apu vrc6;
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struct Nes_Fme7_Apu fme7;
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#ifndef NSF_EMU_NO_VRC7
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struct Nes_Vrc7_Apu vrc7;
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#endif
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#endif
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struct Nes_Cpu cpu;
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struct Nes_Apu apu;
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// Header for currently loaded file
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struct header_t header;
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struct setup_t tfilter;
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struct Track_Filter track_filter;
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struct Multi_Buffer stereo_buf;
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struct Rom_Data rom;
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// Extended nsf info
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struct Nsfe_Info info;
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byte high_ram[fdsram_size + fdsram_offset];
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byte low_ram [low_ram_size];
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};
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// Basic functionality (see Gme_File.h for file loading/track info functions)
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void Nsf_init( struct Nsf_Emu* this );
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blargg_err_t Nsf_load_mem( struct Nsf_Emu* this, void* data, long size );
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blargg_err_t Nsf_post_load( struct Nsf_Emu* this );
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// Set output sample rate. Must be called only once before loading file.
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blargg_err_t Nsf_set_sample_rate( struct Nsf_Emu* this, int sample_rate );
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// Start a track, where 0 is the first track. Also clears warning string.
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blargg_err_t Nsf_start_track( struct Nsf_Emu* this , int );
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// Generate 'count' samples info 'buf'. Output is in stereo. Any emulation
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// errors set warning string, and major errors also end track.
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blargg_err_t Nsf_play( struct Nsf_Emu* this, int count, sample_t* buf );
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void Nsf_clear_playlist( struct Nsf_Emu* this );
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void Nsf_disable_playlist( struct Nsf_Emu* this, bool b ); // use clear_playlist()
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// Track status/control
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// Number of milliseconds (1000 msec = 1 second) played since beginning of track
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int Track_tell( struct Nsf_Emu* this );
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// Seek to new time in track. Seeking backwards or far forward can take a while.
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blargg_err_t Track_seek( struct Nsf_Emu* this, int msec );
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// Skip n samples
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blargg_err_t Track_skip( struct Nsf_Emu* this, int n );
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// Set start time and length of track fade out. Once fade ends track_ended() returns
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// true. Fade time can be changed while track is playing.
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void Track_set_fade( struct Nsf_Emu* this, int start_msec, int length_msec );
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// True if a track has reached its end
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static inline bool Track_ended( struct Nsf_Emu* this )
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{
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return track_ended( &this->track_filter );
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}
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// Disables automatic end-of-track detection and skipping of silence at beginning
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static inline void Track_ignore_silence( struct Nsf_Emu* this, bool disable )
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{
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this->track_filter.silence_ignored_ = disable;
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}
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// Get track length in milliseconds
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int Track_length( struct Nsf_Emu* this, int n );
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// Sound customization
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// Adjust song tempo, where 1.0 = normal, 0.5 = half speed, 2.0 = double speed.
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// Track length as returned by track_info() assumes a tempo of 1.0.
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void Sound_set_tempo( struct Nsf_Emu* this, int t );
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// Mute/unmute voice i, where voice 0 is first voice
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void Sound_mute_voice( struct Nsf_Emu* this, int index, bool mute );
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// Set muting state of all voices at once using a bit mask, where -1 mutes them all,
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// 0 unmutes them all, 0x01 mutes just the first voice, etc.
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void Sound_mute_voices( struct Nsf_Emu* this, int mask );
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// Change overall output amplitude, where 1.0 results in minimal clamping.
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// Must be called before set_sample_rate().
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static inline void Sound_set_gain( struct Nsf_Emu* this, int g )
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{
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assert( !this->sample_rate ); // you must set gain before setting sample rate
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this->gain = g;
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}
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// Emulation (You shouldn't touch these)
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blargg_err_t run_clocks( struct Nsf_Emu* this, blip_time_t* duration, int );
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void write_bank( struct Nsf_Emu* this, int index, int data );
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int cpu_read( struct Nsf_Emu* this, addr_t );
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void cpu_write( struct Nsf_Emu* this, addr_t, int );
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addr_t get_addr( byte const [] );
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bool run_cpu_until( struct Nsf_Emu* this, nes_time_t end );
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// Sets clocks between calls to play routine to p + 1/2 clock
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static inline void set_play_period( struct Nsf_Emu* this, int p ) { this->play_period = p; }
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// Time play routine will next be called
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static inline nes_time_t play_time( struct Nsf_Emu* this ) { return this->next_play; }
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// Emulates to at least time t. Might emulate a few clocks extra.
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void run_until( struct Nsf_Emu* this, nes_time_t t );
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// Runs cpu to at least time t and returns false, or returns true
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// if it encounters illegal instruction (halt).
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bool run_cpu_until( struct Nsf_Emu* this, nes_time_t t );
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// cpu calls through to these to access memory (except instructions)
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int read_mem( struct Nsf_Emu* this, addr_t );
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void write_mem( struct Nsf_Emu* this, addr_t, int );
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// Address of play routine
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static inline addr_t play_addr( struct Nsf_Emu* this ) { return get_addr( this->header.play_addr ); }
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// Same as run_until, except emulation stops for any event (routine returned,
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// play routine called, illegal instruction).
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void run_once( struct Nsf_Emu* this, nes_time_t );
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// Reads byte as cpu would when executing code. Only works for RAM/ROM,
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// NOT I/O like sound chips.
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int read_code( struct Nsf_Emu* this, addr_t addr );
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static inline byte* fdsram( struct Nsf_Emu* this ) { return &this->high_ram [fdsram_offset]; }
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static inline byte* sram( struct Nsf_Emu* this ) { return this->high_ram; }
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static inline byte* unmapped_code( struct Nsf_Emu* this ) { return &this->high_ram [sram_size]; }
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#ifndef NSF_EMU_APU_ONLY
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static inline int fds_enabled( struct Nsf_Emu* this ) { return this->header.chip_flags & fds_flag; }
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static inline int vrc6_enabled( struct Nsf_Emu* this ) { return this->header.chip_flags & vrc6_flag; }
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#ifndef NSF_EMU_NO_VRC7
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static inline int vrc7_enabled( struct Nsf_Emu* this ) { return this->header.chip_flags & vrc7_flag; }
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#endif
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static inline int mmc5_enabled( struct Nsf_Emu* this ) { return this->header.chip_flags & mmc5_flag; }
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static inline int namco_enabled( struct Nsf_Emu* this ) { return this->header.chip_flags & namco_flag; }
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static inline int fme7_enabled( struct Nsf_Emu* this ) { return this->header.chip_flags & fme7_flag; }
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#endif
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#endif
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