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- Game-Music-Emu: Merge commit cf7bfd2.

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Commit title: 'added gme_tell_samples() and gme_seek_samples()'
This commit is contained in:
Edoardo Prezioso 2016-12-16 21:19:56 +01:00 committed by Christoph Oelckers
parent e1af7e3f8c
commit 8895716e27
4 changed files with 25 additions and 2 deletions
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13
game-music-emu/gme/Music_Emu.cpp
View file

@ -178,6 +178,11 @@ blargg_long Music_Emu::msec_to_samples( blargg_long msec ) const
return (sec * sample_rate() + msec * sample_rate() / 1000) * stereo;
}
long Music_Emu::tell_samples() const
{
return out_time;
}
long Music_Emu::tell() const
{
blargg_long rate = sample_rate() * stereo;
@ -185,14 +190,18 @@ long Music_Emu::tell() const
return sec * 1000 + (out_time - sec * rate) * 1000 / rate;
}
blargg_err_t Music_Emu::seek( long msec )
blargg_err_t Music_Emu::seek_samples( long time )
{
blargg_long time = msec_to_samples( msec );
if ( time < out_time )
RETURN_ERR( start_track( current_track_ ) );
return skip( time - out_time );
}
blargg_err_t Music_Emu::seek( long msec )
{
return seek_samples( msec_to_samples( msec ) );
}
blargg_err_t Music_Emu::skip( long count )
{
require( current_track() >= 0 ); // start_track() must have been called already

6
game-music-emu/gme/Music_Emu.h
View file

@ -41,9 +41,15 @@ public:
// Number of milliseconds (1000 msec = 1 second) played since beginning of track
long tell() const;
// Number of samples generated since beginning of track
long tell_samples() const;
// Seek to new time in track. Seeking backwards or far forward can take a while.
blargg_err_t seek( long msec );
// Equivalent to restarting track then skipping n samples
blargg_err_t seek_samples( long n );
// Skip n samples
blargg_err_t skip( long n );

2
game-music-emu/gme/gme.cpp
View file

@ -337,7 +337,9 @@ BLARGG_EXPORT gme_err_t gme_play ( Music_Emu* me, int n, short* p )
BLARGG_EXPORT void gme_set_fade ( Music_Emu* me, int start_msec ) { me->set_fade( start_msec ); }
BLARGG_EXPORT int gme_track_ended ( Music_Emu const* me ) { return me->track_ended(); }
BLARGG_EXPORT int gme_tell ( Music_Emu const* me ) { return me->tell(); }
BLARGG_EXPORT int gme_tell_samples ( Music_Emu const* me ) { return me->tell_samples(); }
BLARGG_EXPORT gme_err_t gme_seek ( Music_Emu* me, int msec ) { return me->seek( msec ); }
BLARGG_EXPORT gme_err_t gme_seek_samples ( Music_Emu* me, int n ) { return me->seek_samples( n ); }
BLARGG_EXPORT int gme_voice_count ( Music_Emu const* me ) { return me->voice_count(); }
BLARGG_EXPORT void gme_ignore_silence ( Music_Emu* me, int disable ) { me->ignore_silence( disable != 0 ); }
BLARGG_EXPORT void gme_set_tempo ( Music_Emu* me, double t ) { me->set_tempo( t ); }

6
game-music-emu/gme/gme.h
View file

@ -47,9 +47,15 @@ int gme_track_ended( Music_Emu const* );
/* Number of milliseconds (1000 = one second) played since beginning of track */
int gme_tell( Music_Emu const* );
/* Number of samples generated since beginning of track */
int gme_tell_samples( Music_Emu const* );
/* Seek to new time in track. Seeking backwards or far forward can take a while. */
gme_err_t gme_seek( Music_Emu*, int msec );
/* Equivalent to restarting track then skipping n samples */
gme_err_t gme_seek_samples( Music_Emu*, int n );
/******** Informational ********/