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First approximation of looping regions at playback.

This commit is contained in:
Jonathan Moore Liles 2008-05-31 15:29:01 -05:00
parent dbe80ad8e6
commit e8ea8724ce
5 changed files with 28 additions and 12 deletions
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8
Timeline/Audio_Region.C
View File

@ -251,7 +251,7 @@ Audio_Region::menu_cb ( const Fl_Menu_ *m )
{
nframes_t offset = x_to_offset( Fl::event_x() );
if ( offset < length() )
if ( offset > 0 )
_loop = offset;
}
else
@ -656,12 +656,14 @@ Audio_Region::draw ( void )
if ( _loop )
{
const int x = timeline->ts_to_x( _loop - offset );
/* FIXME: is there no way to draw these symbols direclty? */
fl_font( FL_SYMBOL, 14 );
fl_color( FL_WHITE );
fl_draw( "@2>", X + timeline->ts_to_x( _loop - start ), y(), 14, 14, (Fl_Align)(FL_ALIGN_LEFT | FL_ALIGN_BOTTOM), 0, 1 );
fl_draw( "@2>", X + x - 7, y(), 14, 14, (Fl_Align)(FL_ALIGN_LEFT | FL_ALIGN_BOTTOM), 0, 1 );
fl_color( FL_WHITE );
fl_draw( "@2<", X + timeline->ts_to_x( _loop - start ), y() + h() - 14, 14, 14, (Fl_Align)(FL_ALIGN_LEFT | FL_ALIGN_BOTTOM), 0, 1 );
fl_draw( "@2<", X + x - 7, y() + h() - 14, 14, 14, (Fl_Align)(FL_ALIGN_LEFT | FL_ALIGN_BOTTOM), 0, 1 );
}
timeline->draw_measure_lines( X, Y, W, H, _box_color );

2
Timeline/Engine/Audio_File.H
View File

@ -95,7 +95,7 @@ public:
virtual void close ( void ) = 0;
virtual void seek ( nframes_t offset ) = 0;
virtual nframes_t read ( sample_t *buf, int channel, nframes_t len ) = 0;
virtual nframes_t read ( sample_t *buf, int channel, nframes_t start, nframes_t end ) = 0;
virtual nframes_t read ( sample_t *buf, int channel, nframes_t start, nframes_t len ) = 0;
virtual nframes_t write ( sample_t *buf, nframes_t len ) = 0;
virtual void finalize ( void ) { _peaks.finish_writing(); }

8
Timeline/Engine/Audio_File_SF.C
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@ -206,22 +206,20 @@ Audio_File_SF::read ( sample_t *buf, int channel, nframes_t len )
/** read samples from /start/ to /end/ into /buf/ */
nframes_t
Audio_File_SF::read ( sample_t *buf, int channel, nframes_t start, nframes_t end )
Audio_File_SF::read ( sample_t *buf, int channel, nframes_t start, nframes_t len )
{
assert( end > start );
lock();
// open();
seek( start );
nframes_t len = read( buf, channel, end - start );
nframes_t cnt = read( buf, channel, len );
unlock();
// close();
return len;
return cnt;
}
/** write /nframes/ from /buf/ to soundfile. Should be interleaved for

2
Timeline/Engine/Audio_File_SF.H
View File

@ -57,7 +57,7 @@ public:
void close ( void );
void seek ( nframes_t offset );
nframes_t read ( sample_t *buf, int channel, nframes_t len );
nframes_t read ( sample_t *buf, int channel, nframes_t start, nframes_t end );
nframes_t read ( sample_t *buf, int channel, nframes_t start, nframes_t len );
nframes_t write ( sample_t *buf, nframes_t nframes );
};

20
Timeline/Engine/Audio_Region.C
View File

@ -108,7 +108,6 @@ Audio_Region::read ( sample_t *buf, nframes_t pos, nframes_t nframes, int channe
// const nframes_t start = ofs + r.start + sofs;
const nframes_t start = r.offset + sofs;
const nframes_t len = min( cnt, nframes - ofs );
const nframes_t end = start + len;
if ( len == 0 )
return 0;
@ -117,7 +116,24 @@ Audio_Region::read ( sample_t *buf, nframes_t pos, nframes_t nframes, int channe
// printf( "reading region ofs = %lu, sofs = %lu, %lu-%lu\n", ofs, sofs, start, end );
cnt = _clip->read( buf + ofs, channel, start, end );
if ( _loop )
{
/* /\* keep things simple *\/ */
/* assert( _loop > len ); */
nframes_t lstart = r.offset + ( sofs % _loop );
cnt = _clip->read( buf + ofs, channel, lstart, len );
/* /\* read the part before the loop point *\/ */
/* cnt = _clip->read( buf + ofs, channel, start, min( len, _loop - start ) ); */
/* /\* read the part after the loop point *\/ */
/* cnt += _clip->read( buf + ofs + cnt, channel, _loop, len - cnt ); */
}
else
cnt = _clip->read( buf + ofs, channel, start, len );
/* apply gain */