Zack Buhman
86d12c37ed
This adds both a midi generator and a midi type 1 simulator. While I would have preferred to use an existing tool for this, I found that timidity++ does not emit pitch wheel events correctly, and I don't know of another widely-distributed tool that does midi-to-midi format conversion. The c++ and python versions were co-developed. I wrote one to test the other. There is more cleanup to do, but `roundtrip.cpp` produces a valid type 0 midi file given a type 1 or type 0 midi file as input.
87 lines
1.7 KiB
C++
87 lines
1.7 KiB
C++
#include <cstdint>
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#include <cassert>
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#include <iostream>
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#include "midi.hpp"
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#include "generate.cpp"
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namespace midi {
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namespace test {
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struct buf_n_t {
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uint32_t n;
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uint8_t buf[4];
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int32_t len;
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};
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void int_variable_length()
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{
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static buf_n_t tests[] = {
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{0x0000'0000, {0x00}, 1},
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{0x0000'0040, {0x40}, 1},
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{0x0000'007f, {0x7f}, 1},
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{0x0000'0080, {0x81, 0x00}, 2},
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{0x0000'2000, {0xc0, 0x00}, 2},
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{0x0000'3fff, {0xff, 0x7f}, 2},
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{0x0000'4000, {0x81, 0x80, 0x00}, 3},
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{0x0010'0000, {0xc0, 0x80, 0x00}, 3},
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{0x001f'ffff, {0xff, 0xff, 0x7f}, 3},
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{0x0020'0000, {0x81, 0x80, 0x80, 0x00}, 4},
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{0x0800'0000, {0xc0, 0x80, 0x80, 0x00}, 4},
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{0x0fff'ffff, {0xff, 0xff, 0xff, 0x7f}, 4},
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};
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for (int i = 0; i < 12; i++) {
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uint8_t buf1[4];
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buf_n_t& test = tests[i];
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uint8_t * buf2 = generate::int_variable_length(&buf1[0], test.n);
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assert(buf2 - buf1 == test.len);
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for (int j = 0; j < test.len; j++)
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assert(buf1[j] == test.buf[j]);
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}
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}
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void header()
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{
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header_t header = {
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.format = header_t::format_t::_2,
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.ntrks = 1,
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.division = {
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.type = division_t::type_t::time_code,
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.time_code = {
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.smpte = -30,
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.ticks_per_frame = 0x50
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}
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}
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};
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uint8_t buf[64] = {0xee};
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uint8_t * res = generate::header(buf, header);
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uint8_t expect[] = {
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0x4d, 0x54, 0x68, 0x64, // chunk type
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0x00, 0x00, 0x00, 0x06, // length
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0x00, 0x02, // format
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0x00, 0x01, // ntrks
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0xe2, 0x50, // division
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};
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assert(res - buf == 14);
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for (int i = 0; i < 14; i++)
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assert(expect[i] == buf[i]);
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}
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}
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}
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int main()
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{
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using namespace midi::test;
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int_variable_length();
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header();
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return 0;
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}
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