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-rw-r--r--libs/ardour/amp.cc102
1 files changed, 0 insertions, 102 deletions
diff --git a/libs/ardour/amp.cc b/libs/ardour/amp.cc
deleted file mode 100644
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--- a/libs/ardour/amp.cc
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- Copyright (C) 2006 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 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.,
- 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#include <cstring>
-#include <cmath>
-#include <algorithm>
-#include <ardour/amp.h>
-#include <ardour/buffer_set.h>
-#include <ardour/audio_buffer.h>
-
-namespace ARDOUR {
-
-
-/** Apply a declicked gain to the audio buffers of @a bufs */
-void
-Amp::run_in_place (BufferSet& bufs, nframes_t nframes, gain_t initial, gain_t target, bool invert_polarity)
-{
- if (nframes == 0)
- return;
-
- if (bufs.count().n_audio() == 0)
- return;
-
- // assert(bufs.buffer_capacity(DataType::AUDIO) >= nframes);
-
- // if we don't need to declick, defer to apply_simple_gain
- if (initial == target) {
- if (target == 0.0) {
- for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) {
- memset (i->data(), 0, sizeof (Sample) * nframes);
- }
- } else if (target != 1.0) {
- for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) {
- apply_gain_to_buffer (i->data(), nframes, target);
- }
- }
- return;
- }
-
- const nframes_t declick = std::min ((nframes_t)128, nframes);
- gain_t delta;
- double fractional_shift = -1.0/declick;
- double fractional_pos;
- gain_t polscale = invert_polarity ? -1.0f : 1.0f;
-
- if (target < initial) {
- /* fade out: remove more and more of delta from initial */
- delta = -(initial - target);
- } else {
- /* fade in: add more and more of delta from initial */
- delta = target - initial;
- }
-
- for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) {
- Sample* const buffer = i->data();
-
- fractional_pos = 1.0;
-
- for (nframes_t nx = 0; nx < declick; ++nx) {
- buffer[nx] *= polscale * (initial + (delta * (0.5 + 0.5 * cos (M_PI * fractional_pos))));
- fractional_pos += fractional_shift;
- }
-
- /* now ensure the rest of the buffer has the target value applied, if necessary. */
-
- if (declick != nframes) {
-
- if (invert_polarity) {
- target = -target;
- }
-
- if (target == 0.0) {
- memset (&buffer[declick], 0, sizeof (Sample) * (nframes - declick));
- } else if (target != 1.0) {
- apply_gain_to_buffer (&buffer[declick], nframes - declick, target);
- }
- }
- }
-}
-
-void
-Amp::apply_simple_gain (BufferSet& bufs, nframes_t nframes, gain_t target)
-{
-}
-
-
-} // namespace ARDOUR