/*
Copyright (C) 2012-2013 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ This file is part of DCP-o-matic.
+
+ DCP-o-matic 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,
+ DCP-o-matic 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.
+ along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "audio_buffers.h"
#include "dcpomatic_assert.h"
+#include <boost/make_shared.hpp>
#include <cassert>
#include <cstring>
#include <cmath>
using std::bad_alloc;
using boost::shared_ptr;
+using boost::make_shared;
/** Construct an AudioBuffers. Audio data is undefined after this constructor.
* @param channels Number of channels.
* @param frames Number of frames to reserve space for.
*/
-AudioBuffers::AudioBuffers (int channels, int frames)
+AudioBuffers::AudioBuffers (int channels, int32_t frames)
{
allocate (channels, frames);
}
if (this == &other) {
return *this;
}
-
+
deallocate ();
allocate (other._channels, other._frames);
copy_from (&other, other._frames, 0, 0);
}
void
-AudioBuffers::allocate (int channels, int frames)
+AudioBuffers::allocate (int channels, int32_t frames)
{
DCPOMATIC_ASSERT (frames >= 0);
DCPOMATIC_ASSERT (channels >= 0);
_channels = channels;
_frames = frames;
_allocated_frames = frames;
-
+
_data = static_cast<float**> (malloc (_channels * sizeof (float *)));
if (!_data) {
throw bad_alloc ();
}
-
+
for (int i = 0; i < _channels; ++i) {
_data[i] = static_cast<float*> (malloc (frames * sizeof (float)));
if (!_data[i]) {
* @param f Frames; must be less than or equal to the number of allocated frames.
*/
void
-AudioBuffers::set_frames (int f)
+AudioBuffers::set_frames (int32_t f)
{
DCPOMATIC_ASSERT (f <= _allocated_frames);
_data[c][i] = 0;
}
}
-
+
_frames = f;
}
AudioBuffers::make_silent (int c)
{
DCPOMATIC_ASSERT (c >= 0 && c < _channels);
-
+
for (int i = 0; i < _frames; ++i) {
_data[c][i] = 0;
}
}
void
-AudioBuffers::make_silent (int from, int frames)
+AudioBuffers::make_silent (int32_t from, int32_t frames)
{
DCPOMATIC_ASSERT ((from + frames) <= _allocated_frames);
* @param write_offset Offset to write to in `to'.
*/
void
-AudioBuffers::copy_from (AudioBuffers const * from, int frames_to_copy, int read_offset, int write_offset)
+AudioBuffers::copy_from (AudioBuffers const * from, int32_t frames_to_copy, int32_t read_offset, int32_t write_offset)
{
if (frames_to_copy == 0) {
/* Prevent the asserts from firing if there is nothing to do */
return;
}
-
+
DCPOMATIC_ASSERT (from->channels() == channels());
DCPOMATIC_ASSERT (from);
* @param to Offset to move to.
* @param frames Number of frames to move.
*/
-
+
void
-AudioBuffers::move (int from, int to, int frames)
+AudioBuffers::move (int32_t from, int32_t to, int32_t frames)
{
if (frames == 0) {
return;
}
-
+
DCPOMATIC_ASSERT (from >= 0);
DCPOMATIC_ASSERT (from < _frames);
DCPOMATIC_ASSERT (to >= 0);
DCPOMATIC_ASSERT (frames <= _frames);
DCPOMATIC_ASSERT ((from + frames) <= _frames);
DCPOMATIC_ASSERT ((to + frames) <= _allocated_frames);
-
+
for (int i = 0; i < _channels; ++i) {
memmove (_data[i] + to, _data[i] + from, frames * sizeof(float));
}
* the buffers, fill the new space with silence.
*/
void
-AudioBuffers::ensure_size (int frames)
+AudioBuffers::ensure_size (int32_t frames)
{
if (_allocated_frames >= frames) {
return;
}
+ /* Round up frames to the next power of 2 to reduce the number
+ of realloc()s that are necessary.
+ */
+ frames--;
+ frames |= frames >> 1;
+ frames |= frames >> 2;
+ frames |= frames >> 4;
+ frames |= frames >> 8;
+ frames |= frames >> 16;
+ frames++;
+
for (int i = 0; i < _channels; ++i) {
_data[i] = static_cast<float*> (realloc (_data[i], frames * sizeof (float)));
if (!_data[i]) {
}
void
-AudioBuffers::accumulate_frames (AudioBuffers const * from, int read_offset, int write_offset, int frames)
+AudioBuffers::accumulate_frames (AudioBuffers const * from, int32_t read_offset, int32_t write_offset, int32_t frames)
{
DCPOMATIC_ASSERT (_channels == from->channels ());
DCPOMATIC_ASSERT (read_offset >= 0);
AudioBuffers::apply_gain (float dB)
{
float const linear = pow (10, dB / 20);
-
+
for (int i = 0; i < _channels; ++i) {
for (int j = 0; j < _frames; ++j) {
_data[i][j] *= linear;
shared_ptr<AudioBuffers>
AudioBuffers::channel (int c) const
{
- shared_ptr<AudioBuffers> o (new AudioBuffers (1, frames ()));
+ shared_ptr<AudioBuffers> o = make_shared<AudioBuffers> (1, frames ());
o->copy_channel_from (this, c, 0);
return o;
}
shared_ptr<AudioBuffers>
AudioBuffers::clone () const
{
- shared_ptr<AudioBuffers> b (new AudioBuffers (channels (), frames ()));
+ shared_ptr<AudioBuffers> b = make_shared<AudioBuffers> (channels (), frames ());
b->copy_from (this, frames (), 0, 0);
return b;
}
projects / dcpomatic.git / blobdiff