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Add LEQ(m) when analysing audio (#1382).
[dcpomatic.git]
/
src
/
lib
/
audio_buffers.cc
diff --git
a/src/lib/audio_buffers.cc
b/src/lib/audio_buffers.cc
index 825c6c2f3219fa8bd6347d7aeddfc97fc005a29b..cfe762659ebdb6d91128557b35cccb3c08c56144 100644
(file)
--- a/
src/lib/audio_buffers.cc
+++ b/
src/lib/audio_buffers.cc
@@
-1,5
+1,5
@@
/*
/*
- Copyright (C) 2012-20
17
Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-20
20
Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
This file is part of DCP-o-matic.
@@
-18,6
+18,7
@@
*/
*/
+#include "util.h"
#include "audio_buffers.h"
#include "dcpomatic_assert.h"
#include <cassert>
#include "audio_buffers.h"
#include "dcpomatic_assert.h"
#include <cassert>
@@
-52,6
+53,12
@@
AudioBuffers::AudioBuffers (boost::shared_ptr<const AudioBuffers> other)
copy_from (other.get(), other->_frames, 0, 0);
}
copy_from (other.get(), other->_frames, 0, 0);
}
+AudioBuffers::AudioBuffers (boost::shared_ptr<const AudioBuffers> other, int32_t frames_to_copy, int32_t read_offset)
+{
+ allocate (other->_channels, frames_to_copy);
+ copy_from (other.get(), frames_to_copy, read_offset, 0);
+}
+
AudioBuffers &
AudioBuffers::operator= (AudioBuffers const & other)
{
AudioBuffers &
AudioBuffers::operator= (AudioBuffers const & other)
{
@@
-125,12
+132,9
@@
AudioBuffers::set_frames (int32_t f)
{
DCPOMATIC_ASSERT (f <= _allocated_frames);
{
DCPOMATIC_ASSERT (f <= _allocated_frames);
- for (int c = 0; c < _channels; ++c) {
- for (int i = f; i < _frames; ++i) {
- _data[c][i] = 0;
- }
+ if (f < _frames) {
+ make_silent (f, _frames - f);
}
}
-
_frames = f;
}
_frames = f;
}
@@
-151,9
+155,10
@@
AudioBuffers::make_silent (int c)
{
DCPOMATIC_ASSERT (c >= 0 && c < _channels);
{
DCPOMATIC_ASSERT (c >= 0 && c < _channels);
- for (int i = 0; i < _frames; ++i) {
- _data[c][i] = 0;
- }
+ /* This isn't really allowed, as all-bits-0 is not guaranteed to mean a 0 float,
+ but it seems that we can get away with it.
+ */
+ memset (_data[c], 0, _frames * sizeof(float));
}
/** Make some frames.
}
/** Make some frames.
@@
-166,9
+171,10
@@
AudioBuffers::make_silent (int32_t from, int32_t frames)
DCPOMATIC_ASSERT ((from + frames) <= _allocated_frames);
for (int c = 0; c < _channels; ++c) {
DCPOMATIC_ASSERT ((from + frames) <= _allocated_frames);
for (int c = 0; c < _channels; ++c) {
- for (int i = from; i < (from + frames); ++i) {
- _data[c][i] = 0;
- }
+ /* This isn't really allowed, as all-bits-0 is not guaranteed to mean a 0 float,
+ but it seems that we can get away with it.
+ */
+ memset (_data[c] + from, 0, frames * sizeof(float));
}
}
}
}
@@
-270,12
+276,13
@@
AudioBuffers::ensure_size (int32_t frames)
if (!_data[i]) {
throw bad_alloc ();
}
if (!_data[i]) {
throw bad_alloc ();
}
- for (int j = _allocated_frames; j < frames; ++j) {
- _data[i][j] = 0;
- }
}
}
+ int32_t const old_allocated = _allocated_frames;
_allocated_frames = frames;
_allocated_frames = frames;
+ if (old_allocated < _allocated_frames) {
+ make_silent (old_allocated, _allocated_frames - old_allocated);
+ }
}
/** Mix some other buffers with these ones. The AudioBuffers must have the same number of channels.
}
/** Mix some other buffers with these ones. The AudioBuffers must have the same number of channels.
@@
-303,7
+310,7
@@
AudioBuffers::accumulate_frames (AudioBuffers const * from, int32_t frames, int3
void
AudioBuffers::apply_gain (float dB)
{
void
AudioBuffers::apply_gain (float dB)
{
- float const linear =
pow (10, dB / 20
);
+ float const linear =
db_to_linear (dB
);
for (int i = 0; i < _channels; ++i) {
for (int j = 0; j < _frames; ++j) {
for (int i = 0; i < _channels; ++i) {
for (int j = 0; j < _frames; ++j) {