Moved project over to Git

1 files changed, 36 insertions, 0 deletions

diff --git a/fx.py b/fx.py
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+++ b/fx.py
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+# Copyright (c) 2009 John Glover, National University of Ireland, Maynooth
+# 
+# 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
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of 
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+from simpl import Partial
+import numpy as np
+
+def time_stretch(partials, factor):
+    """Time stretch partials by factor."""
+    stretched_partials = []
+    step_size = 1.0 / factor
+            
+    for partial in partials:
+        stretched_partial = Partial()
+        stretched_partial.starting_frame = partial.starting_frame * factor
+        stretched_partial.partial_id = partial.partial_id
+        num_steps = int((partial.get_length() - 1) / step_size)
+        current_step = 0
+        for step in range(num_steps):
+            current_peak = partial.peaks[int(np.floor(current_step))]
+            stretched_partial.add_peak(current_peak)
+            current_step += step_size
+        stretched_partials.append(stretched_partial)
+    return stretched_partials
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