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113 lines
3.3 KiB
113 lines
3.3 KiB
/*
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Calf Box, an open source musical instrument.
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Copyright (C) 2010-2011 Krzysztof Foltman
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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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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#include "config-api.h"
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#include "midi.h"
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#include <stdarg.h>
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int cbox_midi_buffer_write_inline(struct cbox_midi_buffer *buffer, uint32_t time, ...)
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{
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uint8_t buf[4];
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va_list va;
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va_start(va, time);
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buf[0] = va_arg(va, int);
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int size = midi_cmd_size(buf[0]);
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for (int i = 1; i < size; i++)
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buf[i] = va_arg(va, int);
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return cbox_midi_buffer_write_event(buffer, time, buf, size);
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}
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int cbox_midi_buffer_write_event(struct cbox_midi_buffer *buffer, uint32_t time, uint8_t *data, uint32_t size)
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{
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struct cbox_midi_event *evt;
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if (buffer->count >= CBOX_MIDI_MAX_EVENTS)
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return 0;
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if (size > 4 && size > CBOX_MIDI_MAX_LONG_DATA - buffer->long_data_size)
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return 0;
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evt = &buffer->events[buffer->count++];
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evt->time = time;
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evt->size = size;
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if (size <= 4)
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{
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memcpy(evt->data_inline, data, size);
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}
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else
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{
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evt->data_ext = buffer->long_data + buffer->long_data_size;
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memcpy(evt->data_ext, data, size);
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buffer->long_data_size += size;
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}
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return 1;
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}
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int cbox_midi_buffer_copy_event(struct cbox_midi_buffer *buffer, const struct cbox_midi_event *event, int new_time)
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{
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struct cbox_midi_event *evt;
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if (buffer->count >= CBOX_MIDI_MAX_EVENTS)
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return 0;
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if (event->size > 4 && event->size > CBOX_MIDI_MAX_LONG_DATA - buffer->long_data_size)
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return 0;
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evt = &buffer->events[buffer->count++];
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evt->time = new_time;
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evt->size = event->size;
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if (event->size <= 4)
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{
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memcpy(evt->data_inline, event->data_inline, event->size);
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}
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else
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{
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evt->data_ext = buffer->long_data + buffer->long_data_size;
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memcpy(evt->data_ext, event->data_ext, event->size);
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buffer->long_data_size += event->size;
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}
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return 1;
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}
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int note_from_string(const char *note)
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{
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static const int semis[] = {9, 11, 0, 2, 4, 5, 7};
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int pos;
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int nn = tolower(note[0]);
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int nv;
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if (nn >= '0' && nn <= '9')
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return atoi(note);
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if (nn < 'a' && nn > 'g')
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return -1;
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nv = semis[nn - 'a'];
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for (pos = 1; note[pos] == 'b' || note[pos] == '#'; pos++)
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nv += (note[pos] == 'b') ? -1 : +1;
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if ((note[pos] == '-' && note[pos + 1] >= '1' && note[pos + 1] <= '2' && note[pos + 2] == '\0') || (note[pos] >= '0' && note[pos] <= '9' && note[pos + 1] == '\0'))
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{
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return nv + 12 * (2 + atoi(note + pos));
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}
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return -1;
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}
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int cbox_config_get_note(const char *cfg_section, const char *key, int def_value)
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{
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const char *cv = cbox_config_get_string(cfg_section, key);
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if (cv)
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return note_from_string(cv);
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return def_value;
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}
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