From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/libgme/kss_emu.h | 223 ++++++++++++++++++++++++++++++++++++ 1 file changed, 223 insertions(+) create mode 100644 lib/rbcodec/codecs/libgme/kss_emu.h (limited to 'lib/rbcodec/codecs/libgme/kss_emu.h') diff --git a/lib/rbcodec/codecs/libgme/kss_emu.h b/lib/rbcodec/codecs/libgme/kss_emu.h new file mode 100644 index 0000000000..382e4b807b --- /dev/null +++ b/lib/rbcodec/codecs/libgme/kss_emu.h @@ -0,0 +1,223 @@ +// MSX computer KSS music file emulator + +// Game_Music_Emu 0.5.5 +#ifndef KSS_EMU_H +#define KSS_EMU_H + +#include "gme.h" +#include "blargg_common.h" + +#include "rom_data.h" +#include "multi_buffer.h" + +#include "kss_scc_apu.h" +#include "z80_cpu.h" +#include "sms_apu.h" +#include "ay_apu.h" +#include "opl_apu.h" +#include "m3u_playlist.h" +#include "track_filter.h" + +typedef int kss_time_t; +typedef int kss_addr_t; +typedef struct Z80_Cpu Kss_Cpu; + +// Sound chip flags +enum { + sms_psg_flag = 1 << 0, + sms_fm_flag = 1 << 1, + msx_psg_flag = 1 << 2, + msx_scc_flag = 1 << 3, + msx_music_flag = 1 << 4, + msx_audio_flag = 1 << 5 +}; + +enum { idle_addr = 0xFFFF }; +enum { scc_enabled_true = 0xC000 }; +enum { mem_size = 0x10000 }; + +// KSS file header +enum { header_size = 0x20 }; +enum { header_base_size = 0x10 }; +enum { header_ext_size = header_size - header_base_size }; + +struct header_t +{ + byte tag [4]; + byte load_addr [2]; + byte load_size [2]; + byte init_addr [2]; + byte play_addr [2]; + byte first_bank; + byte bank_mode; + byte extra_header; + byte device_flags; + + // KSSX extended data, if extra_header==0x10 + byte data_size [4]; + byte unused [4]; + byte first_track [2]; + byte last_track [2]; // if no extended data, we set this to 0xFF + byte psg_vol; + byte scc_vol; + byte msx_music_vol; + byte msx_audio_vol; +}; + +struct sms_t { + struct Sms_Apu psg; + struct Opl_Apu fm; +}; + +struct msx_t { + struct Ay_Apu psg; + struct Scc_Apu scc; + struct Opl_Apu music; + struct Opl_Apu audio; +}; + +struct Kss_Emu { + struct header_t header; + + int chip_flags; + bool scc_accessed; + bool gain_updated; + + unsigned scc_enabled; // 0 or 0xC000 + int bank_count; + + blip_time_t play_period; + blip_time_t next_play; + int ay_latch; + + // general + int voice_count; + int const* voice_types; + int mute_mask_; + int tempo; + int gain; + + int sample_rate; + + // track-specific + int track_count; + int current_track; + + int clock_rate_; + unsigned buf_changed_count; + + // M3u Playlist + struct M3u_Playlist m3u; + + struct setup_t tfilter; + struct Track_Filter track_filter; + + struct sms_t sms; + struct msx_t msx; + + Kss_Cpu cpu; + struct Multi_Buffer stereo_buf; // NULL if using custom buffer + struct Rom_Data rom; + + byte unmapped_read [0x100]; + byte unmapped_write [page_size]; + byte ram [mem_size + cpu_padding]; +}; + +// Basic functionality (see Gme_File.h for file loading/track info functions) + +void Kss_init( struct Kss_Emu* this ); +blargg_err_t Kss_load_mem( struct Kss_Emu* this, const void* data, long size ); +blargg_err_t end_frame( struct Kss_Emu* this, kss_time_t ); + +// Set output sample rate. Must be called only once before loading file. +blargg_err_t Kss_set_sample_rate( struct Kss_Emu* this, int sample_rate ); + +// Start a track, where 0 is the first track. Also clears warning string. +blargg_err_t Kss_start_track( struct Kss_Emu* this, int track ); + +// Generate 'count' samples info 'buf'. Output is in stereo. Any emulation +// errors set warning string, and major errors also end track. +blargg_err_t Kss_play( struct Kss_Emu* this, int count, sample_t* buf ); + +// Track status/control + +// Number of milliseconds (1000 msec = 1 second) played since beginning of track +int Track_tell( struct Kss_Emu* this ); + +// Seek to new time in track. Seeking backwards or far forward can take a while. +blargg_err_t Track_seek( struct Kss_Emu* this, int msec ); + +// Skip n samples +blargg_err_t Track_skip( struct Kss_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 Kss_Emu* this, int start_msec, int length_msec ); + +// True if a track has reached its end +static inline bool Track_ended( struct Kss_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 Kss_Emu* this, bool disable ) +{ + this->track_filter.silence_ignored_ = disable; +} + +// Get track length in milliseconds +static inline int Track_get_length( struct Kss_Emu* this, int n ) +{ + int length = 0; + + if ( (this->m3u.size > 0) && (n < this->m3u.size) ) { + struct entry_t* entry = &this->m3u.entries [n]; + length = entry->length; + } + + if ( length <= 0 ) + length = 120 * 1000; /* 2 minutes */ + + 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 Kss_Emu* this, int t ); + +// Mute/unmute voice i, where voice 0 is first voice +void Sound_mute_voice( struct Kss_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 Kss_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 Kss_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 cpu_write( struct Kss_Emu* this, kss_addr_t, int ); +int cpu_in( struct Kss_Emu* this, kss_time_t, kss_addr_t ); +void cpu_out( struct Kss_Emu* this, kss_time_t, kss_addr_t, int ); + +void cpu_write_( struct Kss_Emu* this, kss_addr_t addr, int data ); +bool run_cpu( struct Kss_Emu* this, kss_time_t end ); +void jsr( struct Kss_Emu* this, byte const addr [] ); + +static inline int sms_psg_enabled( struct Kss_Emu* this ) { return this->chip_flags & sms_psg_flag; } +static inline int sms_fm_enabled( struct Kss_Emu* this ) { return this->chip_flags & sms_fm_flag; } +static inline int msx_psg_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_psg_flag; } +static inline int msx_scc_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_scc_flag; } +static inline int msx_music_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_music_flag;} +static inline int msx_audio_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_audio_flag;} + +#endif -- cgit v1.2.3