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/hes_emu.h | 195 ++++++++++++++++++++++++++++++++++++ 1 file changed, 195 insertions(+) create mode 100644 lib/rbcodec/codecs/libgme/hes_emu.h (limited to 'lib/rbcodec/codecs/libgme/hes_emu.h') 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 -- cgit v1.2.3