extensive changes to PresentationInfo API

[ardour.git] / libs / ardour / reverse.cc

diff --git a/libs/ardour/reverse.cc b/libs/ardour/reverse.cc
index 3fe6aaa6307d55382e27d19562b9cb52aef95caf..b2189cf67e5c3a184224398fd57ff8b5a708be62 100644 (file)
--- a/libs/ardour/reverse.cc
+++ b/libs/ardour/reverse.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2004 Paul Davis 
+    Copyright (C) 2004 Paul Davis
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -15,26 +15,22 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id$
 */
 
 #include <algorithm>
 
-#include <pbd/basename.h>
-
-#include <ardour/types.h>
-#include <ardour/reverse.h>
-#include <ardour/audiofilesource.h>
-#include <ardour/session.h>
-#include <ardour/audioregion.h>
-
-#include "i18n.h"
+#include "ardour/audioregion.h"
+#include "ardour/audiosource.h"
+#include "ardour/reverse.h"
+#include "ardour/types.h"
 
 using namespace std;
 using namespace ARDOUR;
 
+namespace ARDOUR { class Progress; class Session; }
+
 Reverse::Reverse (Session& s)
-       : AudioFilter (s)
+       : Filter (s)
 {
 }
 
@@ -43,69 +39,72 @@ Reverse::~Reverse ()
 }
 
 int
-Reverse::run (AudioRegion& region)
+Reverse::run (boost::shared_ptr<Region> r, Progress*)
 {
-       AudioRegion::SourceList nsrcs;
-       AudioRegion::SourceList::iterator si;
-       const jack_nframes_t blocksize = 256 * 1048;
-       Sample buf[blocksize];
-       jack_nframes_t fpos;
-       jack_nframes_t fend;
-       jack_nframes_t fstart;
-       jack_nframes_t to_read;
+       SourceList nsrcs;
+       SourceList::iterator si;
+       framecnt_t blocksize = 256 * 1024;
+       Sample* buf = 0;
+       framepos_t fpos;
+       framepos_t fstart;
+       framecnt_t to_read;
        int ret = -1;
 
+       boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion>(r);
+       if (!region)
+               return ret;
+
        /* create new sources */
 
-       if (make_new_sources (region, nsrcs)) {
+       if (make_new_sources (region, nsrcs, "", false)) {
                goto out;
        }
 
-       fend = region.start() + region.length();
-       fstart = region.start();
+       fstart = region->start();
 
-       if (blocksize < fend) {
-               fpos =max(fstart, fend - blocksize);
-       } else {
-               fpos = fstart;
+       if (blocksize > region->length()) {
+               blocksize = region->length();
        }
 
-       to_read = min (region.length(), blocksize);
+       fpos = max (fstart, (fstart + region->length() - blocksize));
+
+       buf = new Sample[blocksize];
+       to_read = blocksize;
 
        /* now read it backwards */
 
-       while (1) {
+       while (to_read) {
 
                uint32_t n;
 
-               for (n = 0, si = nsrcs.begin(); n < region.n_channels(); ++n, ++si) {
+               for (n = 0, si = nsrcs.begin(); n < region->n_channels(); ++n, ++si) {
+
+                       /* read it in directly from the source */
 
-                       /* read it in */
-                       
-                       if (region.source (n).read (buf, fpos, to_read) != to_read) {
+                       if (region->audio_source (n)->read (buf, fpos, to_read) != to_read) {
                                goto out;
                        }
-                       
+
                        /* swap memory order */
-                       
-                       for (jack_nframes_t i = 0; i < to_read/2; ++i) {
+
+                       for (framecnt_t i = 0; i < to_read/2; ++i) {
                                swap (buf[i],buf[to_read-1-i]);
                        }
-                       
+
                        /* write it out */
 
-                       if ((*si)->write (buf, to_read) != to_read) {
+                       boost::shared_ptr<AudioSource> asrc(boost::dynamic_pointer_cast<AudioSource>(*si));
+
+                       if (asrc && asrc->write (buf, to_read) != to_read) {
                                goto out;
                        }
                }
 
-               if (fpos == fstart) {
-                       break;
-               } else if (fpos > fstart + to_read) {
+               if (fpos > fstart + blocksize) {
                        fpos -= to_read;
-                       to_read = min (fstart - fpos, blocksize);
+                       to_read = blocksize;
                } else {
-                       to_read = fpos-fstart;
+                       to_read = fpos - fstart;
                        fpos = fstart;
                }
        };
@@ -114,12 +113,14 @@ Reverse::run (AudioRegion& region)
 
   out:
 
+       delete [] buf;
+
        if (ret) {
                for (si = nsrcs.begin(); si != nsrcs.end(); ++si) {
-                       (*si)->mark_for_remove ();
-                       delete *si;
+                       boost::shared_ptr<AudioSource> asrc(boost::dynamic_pointer_cast<AudioSource>(*si));
+                       asrc->mark_for_remove ();
                }
        }
-       
+
        return ret;
 }