From d1a2f52352f8c27254b78a69815ff6b3a27b2f9c Mon Sep 17 00:00:00 2001
From: Jonathan Moore Liles <j.liles@unix.net>
Date: Sat, 10 May 2008 20:40:43 -0500
Subject: [PATCH] Support optional mipmapping of peakfiles. Mipmap peaks for
 new captures.

---
 Timeline/Audio_File.H    |  2 +
 Timeline/Audio_File_SF.C |  2 -
 Timeline/Audio_Region.C  |  2 +
 Timeline/Peaks.C         | 90 +++++++++++++++++++++++++++-------------
 Timeline/Peaks.H         |  1 +
 5 files changed, 67 insertions(+), 30 deletions(-)

diff --git a/Timeline/Audio_File.H b/Timeline/Audio_File.H
index b1a5c65..38847b7 100644
--- a/Timeline/Audio_File.H
+++ b/Timeline/Audio_File.H
@@ -93,6 +93,8 @@ public:
     virtual nframes_t read ( sample_t *buf, int channel, nframes_t start, nframes_t end ) = 0;
     virtual nframes_t write ( sample_t *buf, nframes_t len ) = 0;
 
+    virtual void finalize ( void ) { _peaks.finish_writing(); }
+
     bool read_peaks( float fpp, nframes_t start, nframes_t end, int *peaks, Peak **pbuf, int *channels );
 
 };
diff --git a/Timeline/Audio_File_SF.C b/Timeline/Audio_File_SF.C
index dc38dad..6e7ddc2 100644
--- a/Timeline/Audio_File_SF.C
+++ b/Timeline/Audio_File_SF.C
@@ -158,8 +158,6 @@ Audio_File_SF::close ( void )
     if ( _in )
         sf_close( _in );
 
-    _peaks.finish_writing();
-
     _in = NULL;
 }
 
diff --git a/Timeline/Audio_Region.C b/Timeline/Audio_Region.C
index 93aeaca..834ed04 100644
--- a/Timeline/Audio_Region.C
+++ b/Timeline/Audio_Region.C
@@ -842,6 +842,8 @@ Audio_Region::finalize ( nframes_t frame )
     _clip->close();
     _clip->open();
 
+    _clip->finalize();
+
     /* FIXME: should we attempt to truncate the file? */
 
     _range.length = frame - _range.start - _range.offset;
diff --git a/Timeline/Peaks.C b/Timeline/Peaks.C
index f4ba6f4..9abe50f 100644
--- a/Timeline/Peaks.C
+++ b/Timeline/Peaks.C
@@ -581,47 +581,29 @@ class Peak_Builder
 
 public:
 
+    /** generate additional cache levels for a peakfile with only 1 block (ie. that of a new capture) */
     bool
-    run ( void )
+    make_peaks_mipmap ( void )
         {
+            if ( ! Peaks::mipmapped_peakfiles )
+                return true;
+
             Audio_File *_clip = _peaks->_clip;
 
             const char *filename = _clip->name();
 
-            DMESSAGE( "building peaks for \"%s\"", filename );
-
             FILE *rfp;
 
-            if ( ! ( fp  = fopen( peakname( filename ), "w+" ) ) )
-                return false;
-
-            _clip->seek( 0 );
+            last_block_pos = sizeof( peakfile_block_header );
 
-            Peak buf[ _clip->channels() ];
-
-            DMESSAGE( "building level 1 peak cache" );
-
-            write_block_header( Peaks::cache_minimum );
-
-            /* build first level from source */
-            size_t len;
-            do {
-                len = _peaks->read_source_peaks( buf, 1, Peaks::cache_minimum );
-
-                fwrite( buf, sizeof( buf ), len, fp );
-            }
-            while ( len );
-
-            /* reopen for reading */
-            fclose( fp );
+            /* open for reading */
             rfp = fopen( peakname( filename ), "r" );
-
-//            rfp = freopen( peakname( filename ), "r", fp );
-
             /* open the file again for appending */
             fp = fopen( peakname( filename ), "r+" );
             fseek( fp, 0, SEEK_END );
 
+            Peak buf[ _clip->channels() ];
+
             /* now build the remaining peak levels, each based on the
              * preceding level */
 
@@ -655,6 +637,45 @@ public:
             fclose( rfp );
             fclose( fp );
 
+            return true;
+        }
+
+    bool
+    make_peaks ( void )
+        {
+            Audio_File *_clip = _peaks->_clip;
+
+            const char *filename = _clip->name();
+
+            DMESSAGE( "building peaks for \"%s\"", filename );
+
+            FILE *rfp;
+
+            if ( ! ( fp  = fopen( peakname( filename ), "w+" ) ) )
+                return false;
+
+            _clip->seek( 0 );
+
+            Peak buf[ _clip->channels() ];
+
+            DMESSAGE( "building level 1 peak cache" );
+
+            write_block_header( Peaks::cache_minimum );
+
+            /* build first level from source */
+            size_t len;
+            do {
+                len = _peaks->read_source_peaks( buf, 1, Peaks::cache_minimum );
+
+                fwrite( buf, sizeof( buf ), len, fp );
+            }
+            while ( len );
+
+            /* reopen for reading */
+            fclose( fp );
+
+            make_peaks_mipmap();
+
             DMESSAGE( "done building peaks" );
 
             return true;
@@ -674,7 +695,15 @@ Peaks::make_peaks ( void ) const
 {
     Peak_Builder pb( this );
 
-    return pb.run();
+    return pb.make_peaks();
+}
+
+bool
+Peaks::make_peaks_mipmap ( void ) const
+{
+    Peak_Builder pb( this );
+
+    return pb.make_peaks_mipmap();
 }
 
 /** return normalization factor for a single peak, assuming the peak
@@ -710,6 +739,11 @@ Peaks::finish_writing ( void )
         delete _peak_writer;
         _peak_writer = NULL;
     }
+
+    /* now fill in the rest of the cache */
+
+    if ( ! fork() )
+        exit( make_peaks_mipmap() );
 }
 
 void
diff --git a/Timeline/Peaks.H b/Timeline/Peaks.H
index d243ebb..4c5c132 100644
--- a/Timeline/Peaks.H
+++ b/Timeline/Peaks.H
@@ -101,6 +101,7 @@ public:
 
     bool current ( void ) const;
     bool make_peaks ( void ) const;
+    bool make_peaks_mipmap ( void ) const;
 
     void prepare_for_writing ( void );
     void finish_writing ( void );