From: Paul Brossier <piem@piem.org>
Date: Sat, 24 Oct 2015 19:08:03 +0000 (+0200)
Subject: src/ofxAubioPitch.{cpp,h}: add simple pitch class
X-Git-Url: https://git.aubio.org/?a=commitdiff_plain;h=b1f2e2afc6d4c67110e701c241ed1eadcb46ecdc;p=ofxAubio.git

src/ofxAubioPitch.{cpp,h}: add simple pitch class
---

diff --git a/src/ofxAubioPitch.cpp b/src/ofxAubioPitch.cpp
new file mode 100644
index 0000000..3a25426
--- /dev/null
+++ b/src/ofxAubioPitch.cpp
@@ -0,0 +1,84 @@
+/*
+  Copyright (C) 2015 Paul Brossier <piem@aubio.org>
+
+  This file is part of ofxAubio.
+
+  ofxAubio 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 3 of the License, or
+  (at your option) any later version.
+
+  aubio 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 aubio.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "ofxAubioPitch.h"
+#include "ofLog.h"
+
+ofxAubioPitch::ofxAubioPitch()
+{
+}
+
+void ofxAubioPitch::setup()
+{
+    setup("default", 2048, 256, 44100);
+}
+
+void ofxAubioPitch::setup(string method, int buf_s, int hop_s, int samplerate)
+{
+    hop_size = (uint_t)hop_s;
+    buf_size = (uint_t)buf_s;
+    pitch = new_aubio_pitch((char_t*)method.c_str(),
+                            buf_size, hop_size, samplerate);
+    aubio_pitch_set_unit(pitch, (char_t*)"midi");
+    aubio_input = new_fvec(hop_size);
+    aubio_output = new_fvec(1);
+    curpos = 0;
+    if (pitch) {
+        ofLogNotice() << "created ofxAubioPitch(" << method
+          << ", " << buf_size
+          << ", " << hop_size
+          << ", " << samplerate
+          << ")";
+    }
+}
+
+ofxAubioPitch::~ofxAubioPitch()
+{
+    //if (pitch) del_aubio_pitch(Pitch);
+}
+
+void ofxAubioPitch::audioIn(float * input, int bufferSize, int nChannels)
+{
+    uint_t i, j;
+    for (i = 0; i < bufferSize; i++) {
+        // downmix into aubio_input
+        aubio_input->data[curpos] = 0.;
+        for (j = 0; j < nChannels; j++) {
+            aubio_input->data[curpos] += input[ (curpos + i) * nChannels + j];
+        }
+        aubio_input->data[curpos] /= nChannels;
+        // run aubio block when appropriate
+        if (curpos == hop_size - 1)
+        {
+            blockAudioIn();
+            curpos = -1;
+        }
+        curpos += 1;
+    }
+}
+
+void ofxAubioPitch::blockAudioIn()
+{
+    aubio_pitch_do(pitch, aubio_input, aubio_output);
+    if (aubio_output->data[0]) {
+        //ofLogNotice() << "found pitch: " << aubio_output->data[0];
+        latestPitch = aubio_output->data[0];
+    }
+}
diff --git a/src/ofxAubioPitch.h b/src/ofxAubioPitch.h
new file mode 100644
index 0000000..328808b
--- /dev/null
+++ b/src/ofxAubioPitch.h
@@ -0,0 +1,52 @@
+/*
+  Copyright (C) 2015 Paul Brossier <piem@aubio.org>
+
+  This file is part of ofxAubio.
+
+  ofxAubio 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 3 of the License, or
+  (at your option) any later version.
+
+  aubio 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 aubio.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#pragma once
+
+#include <iostream>
+#include <aubio/aubio.h>
+
+using namespace std;
+
+class ofxAubioPitch {
+
+    public:
+
+       ofxAubioPitch();
+       ~ofxAubioPitch();
+
+       void setup();
+       void setup(string method, int buf_s, int hop_s, int samplerate);
+
+       void audioIn(float *input, int bufferSize, int nChannels);
+
+       float latestPitch;
+
+    private:
+       void blockAudioIn();
+       // aubio stuff
+       uint_t buf_size;
+       uint_t hop_size;
+       fvec_t * aubio_input;
+       fvec_t * aubio_output;
+       aubio_pitch_t * pitch;
+       sint_t curpos;
+
+};