ref: 8743b33bc8aabd209d284b4aa560334f039388a0
dir: /examples/aubionotes.c/
/* Copyright (C) 2003-2013 Paul Brossier <piem@aubio.org> This file is part of aubio. aubio 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/>. */ #define AUBIO_UNSTABLE 1 // for fvec_median #include "utils.h" #define PROG_HAS_PITCH 1 #define PROG_HAS_ONSET 1 #define PROG_HAS_JACK 1 // TODO add PROG_HAS_OUTPUT #include "parse_args.h" uint_t median = 6; fvec_t *note_buffer; fvec_t *note_buffer2; smpl_t curnote = 0.; smpl_t newnote = 0.; uint_t isready = 0; aubio_pitch_t *pitch; aubio_onset_t *o; fvec_t *onset; fvec_t *pitch_obuf; /** append new note candidate to the note_buffer and return filtered value. we * need to copy the input array as fvec_median destroy its input data.*/ void note_append (fvec_t * note_buffer, smpl_t curnote); uint_t get_note (fvec_t * note_buffer, fvec_t * note_buffer2); void process_block (fvec_t *ibuf, fvec_t *obuf) { smpl_t new_pitch, curlevel; fvec_zeros(obuf); aubio_onset_do(o, ibuf, onset); aubio_pitch_do (pitch, ibuf, pitch_obuf); new_pitch = fvec_get_sample(pitch_obuf, 0); if(median){ note_append(note_buffer, new_pitch); } /* curlevel is negatif or 1 if silence */ curlevel = aubio_level_detection(ibuf, silence_threshold); if (fvec_get_sample(onset, 0)) { /* test for silence */ if (curlevel == 1.) { if (median) isready = 0; /* send note off */ send_noteon(curnote,0); } else { if (median) { isready = 1; } else { /* kill old note */ send_noteon(curnote,0); /* get and send new one */ send_noteon(new_pitch,127+(int)floor(curlevel)); curnote = new_pitch; } } } else { if (median) { if (isready > 0) isready++; if (isready == median) { /* kill old note */ send_noteon(curnote,0); newnote = get_note(note_buffer, note_buffer2); curnote = newnote; /* get and send new one */ if (curnote>45){ send_noteon(curnote,127+(int)floor(curlevel)); } } } // if median } } void process_print (void) { //if (verbose) outmsg("%f\n",pitch_obuf->data[0]); } void note_append (fvec_t * note_buffer, smpl_t curnote) { uint_t i = 0; for (i = 0; i < note_buffer->length - 1; i++) { note_buffer->data[i] = note_buffer->data[i + 1]; } note_buffer->data[note_buffer->length - 1] = curnote; return; } uint_t get_note (fvec_t * note_buffer, fvec_t * note_buffer2) { uint_t i; for (i = 0; i < note_buffer->length; i++) { note_buffer2->data[i] = note_buffer->data[i]; } return fvec_median (note_buffer2); } int main(int argc, char **argv) { examples_common_init(argc,argv); verbmsg ("using source: %s at %dHz\n", source_uri, samplerate); verbmsg ("onset method: %s, ", onset_method); verbmsg ("buffer_size: %d, ", buffer_size); verbmsg ("hop_size: %d, ", hop_size); verbmsg ("threshold: %f\n", onset_threshold); verbmsg ("pitch method: %s, ", pitch_method); verbmsg ("buffer_size: %d, ", buffer_size * 4); verbmsg ("hop_size: %d, ", hop_size); verbmsg ("tolerance: %f\n", pitch_tolerance); o = new_aubio_onset (onset_method, buffer_size, hop_size, samplerate); if (onset_threshold != 0.) aubio_onset_set_threshold (o, onset_threshold); onset = new_fvec (1); pitch = new_aubio_pitch (pitch_method, buffer_size * 4, hop_size, samplerate); if (pitch_tolerance != 0.) aubio_pitch_set_tolerance (pitch, pitch_tolerance); pitch_obuf = new_fvec (1); if (median) { note_buffer = new_fvec (median); note_buffer2 = new_fvec (median); } examples_common_process((aubio_process_func_t)process_block, process_print); // send a last note off send_noteon (curnote, 0); del_aubio_pitch (pitch); if (median) { del_fvec (note_buffer); del_fvec (note_buffer2); } del_fvec (pitch_obuf); examples_common_del(); return 0; }