ref: 19f222d84d42721aa650f5dc006088e83a9ba2c3
dir: /examples/aubionotes.c/
/* Copyright (C) 2003-2009 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" /* pitch objects */ smpl_t pitch = 0.; uint_t median = 6; smpl_t curlevel = 0.; aubio_pitch_t *pitchdet; fvec_t *note_buffer = NULL; fvec_t *note_buffer2 = NULL; smpl_t curnote = 0.; smpl_t newnote = 0.; uint_t isready = 0; unsigned int pos = 0; /*frames%dspblocksize*/ aubio_pitch_t *pitchdet; 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); static int aubio_process(smpl_t **input, smpl_t **output, int nframes) { unsigned int j; /*frames*/ for (j=0;j<(unsigned)nframes;j++) { if(usejack) { /* write input to datanew */ fvec_write_sample(ibuf, input[0][j], pos); /* put synthnew in output */ output[0][j] = fvec_read_sample(obuf, pos); } /*time for fft*/ if (pos == overlap_size-1) { /* block loop */ aubio_onset_do(o, ibuf, onset); aubio_pitch_do (pitchdet, ibuf, pitch_obuf); pitch = fvec_read_sample(pitch_obuf, 0); if(median){ note_append(note_buffer, pitch); } /* curlevel is negatif or 1 if silence */ curlevel = aubio_level_detection(ibuf, silence); if (fvec_read_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(pitch,127+(int)floor(curlevel)); curnote = pitch; } for (pos = 0; pos < overlap_size; pos++){ obuf->data[pos] = woodblock->data[pos]; } } } 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 for (pos = 0; pos < overlap_size; pos++) obuf->data[pos] = 0.; } /* end of block loop */ pos = -1; /* so it will be zero next j loop */ } pos++; } return 1; } static void process_print (void) { if (verbose) outmsg("%f\n",pitch); } 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); o = new_aubio_onset (onset_mode, buffer_size, overlap_size, samplerate); if (threshold != 0.) aubio_onset_set_threshold (o, threshold); onset = new_fvec (1); pitchdet = new_aubio_pitch (pitch_mode, buffer_size * 4, overlap_size, samplerate); aubio_pitch_set_tolerance (pitchdet, 0.7); pitch_obuf = new_fvec (1); if (median) { note_buffer = new_fvec (median); note_buffer2 = new_fvec (median); } examples_common_process(aubio_process, process_print); send_noteon (curnote, 0); del_aubio_pitch (pitchdet); if (median) { del_fvec (note_buffer); del_fvec (note_buffer2); } del_fvec (pitch_obuf); examples_common_del(); debug("End of program.\n"); fflush(stderr); return 0; }