Handle peaks for multichannel files.

Audio_File.C

@@ -36,6 +36,14 @@ Audio_File::from_file ( const char * filename )
 
 done:
 
-    a->_peaks.open();
+    a->_peaks = new Peaks[ a->channels() ];
+
+    for ( int i = a->channels(); i-- ; )
+    {
+        a->_peaks[i].channel( i );
+        a->_peaks[i].clip( a );
+        a->_peaks[i].open();
+    }
+
     return a;
 }

Audio_File.H

@@ -32,22 +32,24 @@ class Audio_File
 
 protected:
 
-    Peaks _peaks;
+
     const char *_filename;
     nframes_t _length;                                              /* length of file in samples */
     int _channels;
 
+    Peaks *_peaks;
+
 public:
 
-    Audio_File ( ) : _peaks( this )
+    Audio_File ( )
         {
             _filename = NULL;
-            _length = 0;
+            _length = _channels = 0;
         }
 
     static Audio_File *from_file ( const char *filename );
 
-    Peaks const * peaks ( void ) { return &_peaks; }
+    Peaks const * peaks ( int channel ) { return &_peaks[ channel ]; }
     const char *name ( void ) const { return _filename; }
     nframes_t length ( void ) const  { return _length; }
     int channels ( void ) const { return _channels; }

Audio_File_SF.C

@@ -59,7 +59,8 @@ Audio_File_SF::from_file ( const char *filename )
     c->_length = si.frames;
     c->_channels = si.channels;
 
-    sf_close( in );
+    c->_in = in;
+//    sf_close( in );
 
     return c;
 
@@ -72,12 +73,13 @@ invalid:
 bool
 Audio_File_SF::open ( void )
 {
-    SF_INFO si;
 
-    memset( &si, 0, sizeof( si ) );
+/*     SF_INFO si; */
+
+/*     memset( &si, 0, sizeof( si ) ); */
 
-    if ( ! ( _in = sf_open( _filename, SFM_READ, &si ) ) )
-        return false;
+/*     if ( ! ( _in = sf_open( _filename, SFM_READ, &si ) ) ) */
+/*         return false; */
 
     return true;
 }
@@ -85,7 +87,7 @@ Audio_File_SF::open ( void )
 void
 Audio_File_SF::close ( void )
 {
-    sf_close( _in );
+//    sf_close( _in );
 }
 
 void

Peaks.C

@@ -92,7 +92,7 @@ Peaks::clip_read_peaks ( Peak *peaks, int npeaks, int chunksize ) const
     for ( i = 0; i < npeaks; ++i )
     {
         /* read in a buffer */
-        len = _clip->read( fbuf, 0, chunksize );
+        len = _clip->read( fbuf, _channel, chunksize );
 
         Peak &p = peaks[ i ];
         p.min = 0;
@@ -178,13 +178,13 @@ Peaks::operator[] ( int X ) const
     return peak( timeline->x_to_ts( X ), timeline->x_to_ts( X + 1 ) );
 }
 
-static
+
 const char *
-peakname ( const char *filename )
+Peaks::peakname ( const char *filename ) const
 {
     static char file[512];
 
-    snprintf( file, 512, "%s.peak", filename );
+    snprintf( file, 512, "%s.peak-%d", filename, _channel );
 
     return (const char*)&file;
 }

Peaks.H

@@ -57,6 +57,7 @@ class Peaks
     static peakbuffer peakbuf;
 
     Audio_File *_clip;
+    int _channel;
 
     peakdata *_peaks;
 
@@ -65,12 +66,25 @@ class Peaks
     void read_peaks ( int s, int e, int npeaks, int chunksize ) const;
     int clip_read_peaks ( Peak *peaks, int npeaks, int chunksize ) const;
 
+    const char *peakname ( const char *filename ) const;
+
     Peak & peak ( nframes_t start, nframes_t end ) const;
 
-    Peaks ( );
+    // Peaks ( );
 
 public:
 
+    Peaks ( )
+        {
+           _peaks = new peakdata;
+
+            _peaks->chunksize = 0;
+            _len = 0;
+            _clip = NULL;
+            _channel = 0;
+
+        }
+
     Peaks ( Audio_File *c )
         {
             _peaks = new peakdata;
@@ -78,8 +92,12 @@ public:
             _peaks->chunksize = 0;
             _len = 0;
             _clip = c;
+            _channel = 0;
         }
 
+    void clip ( Audio_File *c ) { _clip = c; }
+    void channel ( int v ) { _channel = v; }
+
     void fill_buffer ( int s, int e ) const;
 
     void downsample ( Peak *peaks, int s, int e, float *mhi, float *mlo ) const;

Region.C

@@ -345,7 +345,11 @@ Region::draw ( int X, int Y, int W, int H )
 
 //    fl_push_clip( x() + Fl::box_dx( box() ), y(), w() - Fl::box_dw( box() ), h() );
 
-    draw_waveform( rx, Y, rw, H, _clip, _start + offset, min( (_end - _start) - offset, _end), _scale, _selected ? _color : fl_invert_color( _color )  );
+    int ch = H / _clip->channels();
+    for ( int i = _clip->channels(); i--; )
+        draw_waveform( rx, Y + (i * ch), rw, ch, _clip, i,
+                       _start + offset, min( (_end - _start) - offset, _end),
+                       _scale, _selected ? _color : fl_invert_color( _color )  );
 
     timeline->draw_measure_lines( rx, Y, rw, H, _box_color );
 
@@ -376,7 +380,8 @@ Region::normalize ( void )
 {
     printf( "normalize: start=%lu end=%lu\n", _start, _end );
 
-    _scale = _clip->peaks()->normalization_factor( _start, _end );
+    /* FIXME: punt */
+    _scale = _clip->peaks( 0 )->normalization_factor( _start, _end );
 }
 
 

Waveform.C

@@ -31,7 +31,7 @@
 
 /** draw a portion of /clip/'s waveform. coordinates are the portion to draw  */
 void
-draw_waveform ( int X, int Y, int W, int H, Audio_File *_clip, nframes_t _start, nframes_t _end, float _scale, Fl_Color color )
+draw_waveform ( int X, int Y, int W, int H, Audio_File *_clip, int channel, nframes_t _start, nframes_t _end, float _scale, Fl_Color color )
 {
     fl_push_clip( X, Y, W, H );
 
@@ -39,15 +39,14 @@ draw_waveform ( int X, int Y, int W, int H, Audio_File *_clip, nframes_t _start,
 
     int start = timeline->ts_to_x( _start );
 
-    {
-        _clip->peaks()->fill_buffer( _start,
-                                     _start + timeline->x_to_ts( W ) );
-    }
+    const Peaks *pk = _clip->peaks( channel );
+
+    pk->fill_buffer( _start,  _start + timeline->x_to_ts( W ) );
 
     j = start;
     for ( int x = X; x < X + W; ++x, ++j )
     {
-        Peak p = (*_clip->peaks())[ j ];
+        Peak p = (*pk)[ j ];
 
         int mid = Y + (H / 2);
 
@@ -73,7 +72,7 @@ draw_waveform ( int X, int Y, int W, int H, Audio_File *_clip, nframes_t _start,
     j = start;
     for ( int x = X; x < X + W; ++x, ++j )
     {
-        Peak p = (*_clip->peaks())[ j ];
+        Peak p = (*pk)[ j ];
 
         p.min *= _scale;
 
@@ -87,7 +86,7 @@ draw_waveform ( int X, int Y, int W, int H, Audio_File *_clip, nframes_t _start,
     j = start;
     for ( int x = X; x < X + W; ++x, ++j )
     {
-        Peak p = (*_clip->peaks())[ j ];
+        Peak p = (*pk)[ j ];
 
         p.max *= _scale;
 

Waveform.H

@@ -26,4 +26,4 @@
 
 #include "Audio_File.H"
 
-void draw_waveform ( int X, int Y, int W, int H, Audio_File *_clip, nframes_t _start, nframes_t _end, float _scale, Fl_Color color );
+void draw_waveform ( int X, int Y, int W, int H, Audio_File *_clip, int channel, nframes_t _start, nframes_t _end, float _scale, Fl_Color color );