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Update libgme to Blargg's Game_Music_Emu 0.6-pre.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30397 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andree Buschmann
parent
d089e10403
commit
13cbade08a
68 changed files with 4113 additions and 4893 deletions
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@ -1,11 +1,13 @@
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// Sega Master System/Mark III, Sega Genesis/Mega Drive, BBC Micro VGM music file emulator
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// Game_Music_Emu 0.5.5
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// Game_Music_Emu 0.6-pre
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#ifndef VGM_EMU_H
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#define VGM_EMU_H
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#include "blargg_common.h"
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#include "blargg_source.h"
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#include "track_filter.h"
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#include "resampler.h"
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#include "multi_buffer.h"
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#include "ym2413_emu.h"
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@ -17,7 +19,6 @@ typedef int fm_time_t;
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enum { fm_time_bits = 12 };
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enum { blip_time_bits = 12 };
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enum { buf_size = 2048 };
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// VGM header format
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enum { header_size = 0x40 };
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@ -46,9 +47,9 @@ enum { gme_max_field = 63 };
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struct track_info_t
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{
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/* times in milliseconds; -1 if unknown */
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long length;
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long intro_length;
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long loop_length;
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int length;
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int intro_length;
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int loop_length;
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/* empty string if not available */
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char game [64];
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@ -63,11 +64,11 @@ struct track_info_t
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// YM2413 sound chip emulator. I can provide one I've modified to work with the library.
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struct Vgm_Emu {
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int fm_rate;
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long psg_rate;
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long vgm_rate;
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int psg_rate;
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int vgm_rate;
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bool disable_oversampling;
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long fm_time_offset;
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int fm_time_offset;
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int fm_time_factor;
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int blip_time_factor;
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@ -84,47 +85,34 @@ struct Vgm_Emu {
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int dac_amp;
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int dac_disabled; // -1 if disabled
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struct Blip_Buffer blip_buf;
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// general
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long clock_rate_;
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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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int max_initial_silence;
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int voice_count;
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int const *voice_types;
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int mute_mask_;
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int tempo;
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int gain;
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long sample_rate;
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// track-specific
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blargg_long out_time; // number of samples played since start of track
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blargg_long emu_time; // number of samples emulator has generated since start of track
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bool emu_track_ended_; // emulator has reached end of track
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volatile bool track_ended;
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// fading
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blargg_long fade_start;
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int fade_step;
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// silence detection
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int silence_lookahead; // speed to run emulator when looking ahead for silence
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bool ignore_silence;
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long silence_time; // number of samples where most recent silence began
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long silence_count; // number of samples of silence to play before using buf
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long buf_remain; // number of samples left in silence buffer
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int sample_rate;
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// larger items at the end
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struct track_info_t info;
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sample_t buf_ [buf_size];
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struct setup_t tfilter;
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struct Track_Filter track_filter;
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struct Ym2612_Emu ym2612;
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struct Ym2413_Emu ym2413;
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struct Sms_Apu psg;
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struct Blip_Synth pcm;
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struct Blip_Buffer blip_buf;
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struct Resampler resampler;
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struct Stereo_Buffer buf;
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struct Multi_Buffer stereo_buf;
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};
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void Vgm_init( struct Vgm_Emu* this );
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@ -135,7 +123,7 @@ static inline void Vgm_disable_oversampling( struct Vgm_Emu* this, bool disable
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// Header for currently loaded file
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static inline struct header_t *header( struct Vgm_Emu* this ) { return (struct header_t*) this->file_begin; }
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// Basic functionality (see Gme_File.h for file loading/track info functions)
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blargg_err_t Vgm_load_mem( struct Vgm_Emu* this, byte const* new_data, long new_size, bool parse_info );
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@ -144,34 +132,46 @@ blargg_err_t Vgm_load_mem( struct Vgm_Emu* this, byte const* new_data, long new_
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static inline bool uses_fm( struct Vgm_Emu* this ) { return Ym2612_enabled( &this->ym2612 ) || Ym2413_enabled( &this->ym2413 ); }
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// Set output sample rate. Must be called only once before loading file.
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blargg_err_t Vgm_set_sample_rate( struct Vgm_Emu* this, long sample_rate );
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blargg_err_t Vgm_set_sample_rate( struct Vgm_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 Vgm_start_track( struct Vgm_Emu* this );
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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 Vgm_play( struct Vgm_Emu* this, long count, sample_t* buf );
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blargg_err_t Vgm_play( struct Vgm_Emu* this, int count, sample_t* buf );
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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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long Track_tell( struct Vgm_Emu* this );
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int Track_tell( struct Vgm_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 Vgm_Emu* this, long msec );
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blargg_err_t Track_seek( struct Vgm_Emu* this, int msec );
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// Skip n samples
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blargg_err_t Track_skip( struct Vgm_Emu* this, long n );
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blargg_err_t Track_skip( struct Vgm_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 Vgm_Emu* this, long start_msec, long length_msec );
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void Track_set_fade( struct Vgm_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 Vgm_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 Vgm_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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static inline long Track_get_length( struct Vgm_Emu* this )
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static inline int Track_get_length( struct Vgm_Emu* this )
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{
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long length = this->info.length;
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int length = this->info.length;
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if ( length <= 0 )
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{
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length = this->info.intro_length + 2 * this->info.loop_length; // intro + 2 loops
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@ -181,20 +181,20 @@ static inline long Track_get_length( struct Vgm_Emu* this )
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return length;
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}
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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 Vgm_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 Vgm_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 Vgm_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 Vgm_Emu* this, int g )
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@ -203,5 +203,4 @@ static inline void Sound_set_gain( struct Vgm_Emu* this, int g )
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this->gain = g;
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}
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#endif
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