115 lines
2.6 KiB
C++
115 lines
2.6 KiB
C++
/*
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* Copyright (C) 2015 Robin Gareus <robin@gareus.org>
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* Copyright (C) 2015-2017 Paul Davis <paul@linuxaudiosystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <cmath>
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#include <cstring>
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#include "ardour/ebur128_analysis.h"
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#include "pbd/i18n.h"
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using namespace Vamp;
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using namespace ARDOUR;
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using namespace std;
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/* need a static initializer function for this */
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EBUr128Analysis::EBUr128Analysis (float sr)
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: AudioAnalyser (sr, X_("libardourvampplugins:ebur128"))
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, _loudness (0)
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, _loudness_range (0)
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{
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}
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EBUr128Analysis::~EBUr128Analysis()
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{
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}
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int
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EBUr128Analysis::run (Readable* src)
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{
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int ret = -1;
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bool done = false;
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samplecnt_t len = src->readable_length();
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samplepos_t pos = 0;
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uint32_t n_channels = src->n_channels();
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Plugin::FeatureSet features;
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plugin->reset ();
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if (!plugin->initialise (n_channels, stepsize, bufsize)) {
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return -1;
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}
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float** bufs = (float**) malloc(n_channels * sizeof(float*));
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for (uint32_t c = 0; c < n_channels; ++c) {
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bufs[c] = (float*) malloc(bufsize * sizeof(float));
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}
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while (!done) {
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samplecnt_t to_read;
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to_read = min ((len - pos), (samplecnt_t) bufsize);
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for (uint32_t c = 0; c < n_channels; ++c) {
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if (src->read (bufs[c], pos, to_read, c) != to_read) {
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goto out;
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}
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/* zero fill buffer if necessary */
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if (to_read != bufsize) {
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memset (bufs[c] + to_read, 0, (bufsize - to_read) * sizeof (float));
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}
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}
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plugin->process (bufs, RealTime::fromSeconds ((double) pos / sample_rate));
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pos += min (stepsize, to_read);
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if (pos >= len) {
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done = true;
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}
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}
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features = plugin->getRemainingFeatures ();
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if (use_features (features, 0)) {
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goto out;
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}
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ret = 0;
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out:
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for (uint32_t c = 0; c < n_channels; ++c) {
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free (bufs[c]);
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}
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free (bufs);
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return ret;
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}
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int
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EBUr128Analysis::use_features (Plugin::FeatureSet& features, ostream* out)
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{
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if (features.empty() || features.size() != 2) {
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return 0;
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}
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_loudness = features[0][0].values[0];
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_loudness_range = features[1][0].values[0];
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return 0;
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}
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