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Update libgme to Blargg's Game_Music_Emu 0.6-pre.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30397 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andree Buschmann 2011-08-31 19:19:49 +00:00
parent d089e10403
commit 13cbade08a
68 changed files with 4113 additions and 4893 deletions
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74
apps/codecs/libgme/sgc_emu.h
View file

@ -12,16 +12,14 @@
#include "sms_fm_apu.h"
#include "sms_apu.h"
#include "m3u_playlist.h"
#include "track_filter.h"
typedef short sample_t;
typedef struct Z80_Cpu Sgc_Cpu;
enum { buf_size = 2048 };
// SGC file header
enum { header_size = 0xA0 };
struct header_t
{
{
char tag [4]; // "SGC\x1A"
byte vers; // 0x01
byte rate; // 0=NTSC 1=PAL
@ -48,12 +46,11 @@ struct header_t
static inline bool valid_tag( struct header_t* h )
{
return 0 == memcmp( h->tag, "SGC\x1A", 4 );
}
}
static inline int effect_count( struct header_t* h ) { return h->last_effect ? h->last_effect - h->first_effect + 1 : 0; }
struct Sgc_Emu {
struct Sgc_Emu {
bool fm_accessed;
cpu_time_t play_period;
@ -65,40 +62,28 @@ struct Sgc_Emu {
// general
int voice_count;
int const* voice_types;
int mute_mask_;
int tempo;
int gain;
long sample_rate;
int sample_rate;
// track-specific
volatile bool track_ended;
int current_track;
int track_count;
blargg_long out_time; // number of samples played since start of track
blargg_long emu_time; // number of samples emulator has generated since start of track
bool emu_track_ended_; // emulator has reached end of track
// fading
blargg_long fade_start;
int fade_step;
// silence detection
bool ignore_silence;
int max_initial_silence;
int silence_lookahead; // speed to run emulator when looking ahead for silence
long silence_time; // number of samples where most recent silence began
long silence_count; // number of samples of silence to play before using buf
long buf_remain; // number of samples left in silence buffer
long clock_rate_;
int clock_rate_;
unsigned buf_changed_count;
// M3u Playlist
struct M3u_Playlist m3u;
struct header_t header;
sample_t buf [buf_size];
struct Stereo_Buffer stereo_buf;
struct setup_t tfilter;
struct Track_Filter track_filter;
struct Multi_Buffer stereo_buf;
struct Sms_Apu apu;
struct Sms_Fm_Apu fm_apu;
@ -106,12 +91,11 @@ struct Sgc_Emu {
Sgc_Cpu cpu;
// large items
struct header_t header;
struct Rom_Data rom;
byte vectors [page_size + page_padding];
byte unmapped_write [0x4000];
byte ram [0x2000 + page_padding];
byte ram2 [0x4000 + page_padding];
byte unmapped_write [0x4000];
};
// Basic functionality (see Gme_File.h for file loading/track info functions)
@ -119,41 +103,53 @@ struct Sgc_Emu {
void Sgc_init( struct Sgc_Emu* this );
blargg_err_t Sgc_load_mem( struct Sgc_Emu* this, const void* data, long size );
static inline int clock_rate( struct Sgc_Emu* this ) { return this->header.rate ? 3546893 : 3579545; }
// 0x2000 bytes
static inline void set_coleco_bios( struct Sgc_Emu* this, void* p ) { this->coleco_bios = p; }
// Set output sample rate. Must be called only once before loading file.
blargg_err_t Sgc_set_sample_rate( struct Sgc_Emu* this, long sample_rate );
blargg_err_t Sgc_set_sample_rate( struct Sgc_Emu* this, int sample_rate );
// Start a track, where 0 is the first track. Also clears warning string.
blargg_err_t Sgc_start_track( struct Sgc_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 Sgc_play( struct Sgc_Emu* this, long count, sample_t* buf );
blargg_err_t Sgc_play( struct Sgc_Emu* this, int count, sample_t* buf );
// Track status/control
// Number of milliseconds (1000 msec = 1 second) played since beginning of track
long Track_tell( struct Sgc_Emu* this );
int Track_tell( struct Sgc_Emu* this );
// Seek to new time in track. Seeking backwards or far forward can take a while.
blargg_err_t Track_seek( struct Sgc_Emu* this, long msec );
blargg_err_t Track_seek( struct Sgc_Emu* this, int msec );
// Skip n samples
blargg_err_t Track_skip( struct Sgc_Emu* this, long n );
blargg_err_t Track_skip( struct Sgc_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 Sgc_Emu* this, long start_msec, long length_msec );
void Track_set_fade( struct Sgc_Emu* this, int start_msec, int length_msec );
// True if a track has reached its end
static inline bool Track_ended( struct Sgc_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 Sgc_Emu* this, bool disable )
{
this->track_filter.silence_ignored_ = disable;
}
// Get track length in milliseconds
static inline long Track_get_length( struct Sgc_Emu* this, int n )
static inline int Track_get_length( struct Sgc_Emu* this, int n )
{
long length = 120 * 1000; /* 2 minutes */
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;