Make peak streaming work again.

Timeline/Audio_File.H

@@ -54,8 +54,6 @@ protected:
 
     Peaks _peaks;
 
-//    Peak_Writer *_peak_writer;
-
     static const format_desc *
     find_format ( const format_desc *fd, const char *name )
         {

Timeline/Audio_File_SF.C

@@ -126,8 +126,7 @@ Audio_File_SF::create ( const char *filename, nframes_t samplerate, int channels
 
     c->_in         = out;
 
-    /* FIXME: 256 ? */
-//    c->_peak_writer = new Peak_Writer( name, 256, channels );
+    c->_peaks.prepare_for_writing();
 
     return c;
 }
@@ -159,9 +158,6 @@ Audio_File_SF::close ( void )
     if ( _in )
         sf_close( _in );
 
-/*     if ( _peak_writer ) */
-/*         delete _peak_writer; */
-
     _in = NULL;
 }
 
@@ -228,7 +224,7 @@ Audio_File_SF::read ( sample_t *buf, int channel, nframes_t start, nframes_t end
 nframes_t
 Audio_File_SF::write ( sample_t *buf, nframes_t nframes )
 {
-//    _peak_writer->write( buf, nframes );
+    _peaks.write( buf, nframes );
 
     nframes_t l = sf_writef_float( _in, buf, nframes );
 

Timeline/Peaks.C

@@ -78,6 +78,9 @@
 
 Peaks::peakbuffer Peaks::_peakbuf;
 
+
+bool Peaks::mipmapped_peakfiles = true;
+
 /* chunksizes at which to generate peakfiles (on demand). This should
  pretty much cover the usable range.  Better performance can be
  achieved at high zoom-levels and for compressed sources with a
@@ -88,6 +91,24 @@ const int Peaks::cache_levels  = 8;                             /* number of sam
 
 const int Peaks::cache_step    = 1;                             /* powers of two between each level. 4 == 256, 2048, 16384, ... */
 
+/* Peaks ( ) */
+/* { */
+/*     _clip = NULL; */
+/* } */
+
+Peaks::Peaks ( Audio_File *c )
+{
+    _clip = c;
+    _peak_writer = NULL;
+}
+
+Peaks::~Peaks ( )
+{
+    if ( _peak_writer )
+        delete _peak_writer;
+}
+
+
 static
 const char *
 peakname ( const char *filename, nframes_t chunksize )
@@ -297,7 +318,7 @@ Peaks::read_peakfile_peaks ( Peak *peaks, nframes_t s, int npeaks, nframes_t chu
 
     nframes_t ncc = nearest_cached_chunksize( chunksize );
 
-    if ( ! current( cache_minimum ) )
+    if ( ! _peak_writer && ! current( cache_minimum ) )
         /* Build peaks asyncronously */
         if ( ! fork() )
             exit( make_peaks( ) );
@@ -532,6 +553,26 @@ Peak::normalization_factor( void ) const
     return s;
 }
 
+
+/* wrapper for peak writer */
+void
+Peaks::prepare_for_writing ( void )
+{
+    assert( ! _peak_writer );
+
+    _peak_writer = new Peak_Writer( _clip->name(), cache_minimum, _clip->channels() );
+}
+
+void
+Peaks::write ( sample_t *buf, nframes_t nframes )
+{
+    _peak_writer->write( buf, nframes );
+}
+
+/* The Peak_Writer is for streaming peaks from audio buffers to disk
+ * while capturing. It works by accumulating a peak value across
+ * write() calls. */
+
 Peak_Writer::Peak_Writer ( const char *filename, nframes_t chunksize, int channels )
 {
 
@@ -549,7 +590,7 @@ Peak_Writer::Peak_Writer ( const char *filename, nframes_t chunksize, int channe
 Peak_Writer::~Peak_Writer ( )
 {
     fclose( _fp );
-    delete _peak;
+    delete[] _peak;
 }
 
 /** append peaks for samples in /buf/ to peakfile */

Timeline/Peaks.H

@@ -28,7 +28,6 @@ struct Peak {
     float max;
 
     float normalization_factor ( void ) const;
-
 };
 
 class Audio_File;
@@ -69,42 +68,39 @@ class Peaks
     int read_source_peaks ( Peak *peaks, int npeaks, nframes_t chunksize ) const;
     int read_peakfile_peaks ( Peak *peaks, nframes_t s, int npeaks, nframes_t chunksize ) const;
 
-    Peak_Writer *_peak_writer;
+    Peak_Writer *_peak_writer; /* exists when streaming peaks to disk */
+
+
+    /* not permitted */
+    Peaks ( const Peaks &rhs );
+    const Peaks &operator= ( const Peaks &rhs );
 
 public:
 
+    static bool mipmapped_peakfiles;
 
     static const int cache_minimum;
     static const int cache_levels;
     static const int cache_step;
 
-    Peaks ( )
-        {
-            _clip = NULL;
-        }
 
-    Peaks ( Audio_File *c )
-        {
-            _clip = c;
-        }
+
+    Peaks ( Audio_File *c );
+    ~Peaks ( );
 
     Peak *peakbuf ( void ) const { return Peaks::_peakbuf.buf->data; }
     void clip ( Audio_File *c ) { _clip = c; }
 
     int fill_buffer ( float fpp, nframes_t s, nframes_t e ) const;
 
-    void downsample ( Peak *peaks, int s, int e, float *mhi, float *mlo ) const;
     void read ( int X, float *hi, float *lo ) const;
     bool open ( void );
-//    float normalization_factor( float fpp, nframes_t start, nframes_t end ) ;
 
     bool current ( nframes_t chunksize ) const;
     bool make_peaks ( void ) const;
 
-    Peak & peak ( nframes_t start, nframes_t end ) const;
-
-    Peak & operator[] ( int X ) const;
-
+    void prepare_for_writing ( void );
+    void write ( sample_t *buf, nframes_t nframes );
 };
 
 #include <stdio.h>