188 lines
3.7 KiB
C++
188 lines
3.7 KiB
C++
/*
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Copyright (C) 2012 Paul Davis
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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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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cstring>
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#include <vamp-hostsdk/PluginLoader.h>
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#include <glibmm/miscutils.h>
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#include <glibmm/fileutils.h>
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#include <glib/gstdio.h> // for g_remove()
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#include "pbd/error.h"
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#include "pbd/failed_constructor.h"
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#include "ardour/audioanalyser.h"
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#include "ardour/readable.h"
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#include <cstring>
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#include "i18n.h"
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using namespace std;
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using namespace Vamp;
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using namespace PBD;
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using namespace ARDOUR;
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AudioAnalyser::AudioAnalyser (float sr, AnalysisPluginKey key)
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: sample_rate (sr)
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, plugin_key (key)
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{
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/* create VAMP plugin and initialize */
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if (initialize_plugin (plugin_key, sample_rate)) {
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error << string_compose (_("cannot load VAMP plugin \"%1\""), key) << endmsg;
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throw failed_constructor();
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}
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}
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AudioAnalyser::~AudioAnalyser ()
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{
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delete plugin;
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}
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int
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AudioAnalyser::initialize_plugin (AnalysisPluginKey key, float sr)
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{
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using namespace Vamp::HostExt;
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PluginLoader* loader (PluginLoader::getInstance());
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plugin = loader->loadPlugin (key, sr, PluginLoader::ADAPT_ALL);
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if (!plugin) {
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error << string_compose (_("VAMP Plugin \"%1\" could not be loaded"), key) << endmsg;
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return -1;
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}
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/* we asked for the buffering adapter, so set the blocksize to
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something that makes for efficient disk i/o
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*/
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bufsize = 65536;
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stepsize = bufsize;
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if (plugin->getMinChannelCount() > 1) {
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delete plugin;
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return -1;
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}
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if (!plugin->initialise (1, stepsize, bufsize)) {
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delete plugin;
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return -1;
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}
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return 0;
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}
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void
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AudioAnalyser::reset ()
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{
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if (plugin) {
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plugin->reset ();
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}
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}
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int
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AudioAnalyser::analyse (const string& path, Readable* src, uint32_t channel)
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{
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ofstream ofile;
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Plugin::FeatureSet features;
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int ret = -1;
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bool done = false;
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Sample* data = 0;
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framecnt_t len = src->readable_length();
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framepos_t pos = 0;
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float* bufs[1] = { 0 };
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string tmp_path;
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if (!path.empty()) {
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/* store data in tmp file, not the real one */
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tmp_path = path;
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tmp_path += ".tmp";
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ofile.open (tmp_path.c_str());
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if (!ofile) {
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goto out;
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}
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}
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data = new Sample[bufsize];
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bufs[0] = data;
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while (!done) {
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framecnt_t to_read;
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/* read from source */
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to_read = min ((len - pos), (framecnt_t) bufsize);
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if (src->read (data, pos, to_read, channel) != 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 (data + to_read, 0, (bufsize - to_read) * sizeof (Sample));
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}
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features = plugin->process (bufs, RealTime::fromSeconds ((double) pos / sample_rate));
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if (use_features (features, (path.empty() ? 0 : &ofile))) {
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goto out;
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}
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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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/* finish up VAMP plugin */
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features = plugin->getRemainingFeatures ();
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if (use_features (features, (path.empty() ? &ofile : 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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/* works even if it has not been opened */
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ofile.close ();
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if (ret) {
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g_remove (tmp_path.c_str());
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} else if (!path.empty()) {
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/* move the data file to the requested path */
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g_rename (tmp_path.c_str(), path.c_str());
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}
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delete [] data;
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return ret;
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}
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