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octasox.cc
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octasox.cc
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/*
* Octasox.
* Generate sox command lines that chop samples based on Octatrack slices.
*
* Copyright 2020 Johannes Meng
* SPDX-License-Identifier: BSD-2-Clause
*/
/*
* Code in ot is taken from
*
* https://github.com/KaiDrange/OctaChainer,
*
* which is released as public domain. Original license text for all code in
* namespace ot:
*
* This is free and unencumbered software released into the public domain.
*
* Anyone is free to copy, modify, publish, use, compile, sell, or
* distribute this software, either in source code form or as a compiled
* binary, for any purpose, commercial or non-commercial, and by any
* means.
*
* In jurisdictions that recognize copyright laws, the author or authors
* of this software dedicate any and all copyright interest in the
* software to the public domain. We make this dedication for the benefit
* of the public at large and to the detriment of our heirs and
* successors. We intend this dedication to be an overt act of
* relinquishment in perpetuity of all present and future rights to this
* software under copyright law.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* For more information, please refer to <http://unlicense.org>
*/
#include <cstdint>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <string>
#include <arpa/inet.h>
namespace ot {
static constexpr unsigned char header_bytes[] = {
0x46,0x4F,0x52,0x4D,
0x00,0x00,0x00,0x00,
0x44,0x50,0x53,0x31,
0x53,0x4D,0x50,0x41
};
static constexpr unsigned char unknown_bytes[] = {
0x00,0x00,0x00,0x00,0x00,0x02,0x00
};
enum Loop_t : int32_t {
NoLoop = 0,
Loop = 1,
PIPO = 2
};
enum Stretch_t : int32_t {
NoStrech = 0,
Normal = 2,
Beat = 3
};
enum TrigQuant_t : int32_t {
Direct = 0xFF,
Pattern = 0,
S_1=1,
S_2=2,
S_3=3,
S_4=4,
S_6=5,
S_8=6,
S_12=7,
S_16=8,
S_24=9,
S_32=10,
S_48=11,
S_64=12,
S_96=13,
S_128=14,
S_192=15,
S_256=16
};
#pragma pack(push)
#pragma pack(1)
struct Slice
{
uint32_t startPoint;
uint32_t endPoint;
uint32_t loopPoint;
};
struct OTData
{
uint8_t header[16]; // 0x00
uint8_t unknown[7]; // 0x10 (All blank except 0x15 = 2)
uint32_t tempo; // 0x17 (BPM*24)
uint32_t trimLen; // 0x1B (value*100)
uint32_t loopLen; // 0x1F (value*100)
uint32_t stretch; // 0x23 (0ff = 0, Normal = 2, Beat = 3)
uint32_t loop; // 0x27 (Off = 0, Normal = 1, PingPong = 2)
uint16_t gain; // 0x2B (0x30 = 0, 0x60 = 24 (max), 0x00 = -24 (min))
uint8_t quantize; // 0x2D (0x00 = Pattern length, 0xFF = Direct, 1-10 = 1,2,3,4,6,8,12,16,24,32,48,64,96,128,192,256)
uint32_t trimStart; // 0x2E
uint32_t trimEnd; // 0x32
uint32_t loopPoint; // 0x36
Slice slices[64]; // 0x3A - 0x339
uint32_t sliceCount; // 0x33A
uint16_t checkSum; // 0x33E
};
#pragma pack(pop)
} // namespace ot
void load(const char* file, ot::OTData &data)
{
std::fill(reinterpret_cast<char*>(&data),
reinterpret_cast<char*>(&data+1),
0);
std::ifstream f(file, std::ios::in | std::ios::binary);
const auto begin = f.tellg();
f.seekg(0, std::ios::end);
const auto end = f.tellg();
const size_t numBytes = end-begin;
if (numBytes != sizeof(ot::OTData))
throw std::runtime_error(std::string(file)+" This is not a valid .ot file");
f.seekg(0);
f.read(reinterpret_cast<char*>(&data), numBytes);
f.close();
// Convert endianness!
data.tempo = ntohl(data.tempo);
data.trimLen = ntohl(data.trimLen);
data.loopLen = ntohl(data.loopLen);
data.stretch = ntohl(data.stretch);
data.loop = ntohl(data.loop);
data.gain = ntohs(data.gain);
data.trimStart = ntohl(data.trimStart);
data.trimEnd = ntohl(data.trimEnd);
data.loopPoint = ntohl(data.loopPoint);
data.sliceCount = ntohl(data.sliceCount);
data.checkSum = ntohs(data.checkSum);
for (uint32_t i = 0; i < data.sliceCount; ++i)
{
ot::Slice& s = data.slices[i];
s.startPoint = ntohl(s.startPoint);
s.endPoint = ntohl(s.endPoint);
s.loopPoint = ntohl(s.loopPoint);
}
};
int main(int argc, char** argv)
{
if (argc < 2)
{
std::cerr << "usage: octasox OTFILE [ OTFILE ...]" << std::endl;
return 1;
}
uint32_t preset = 0;
for (uint32_t s = 1; s < argc; ++s)
{
const std::string settingsFile(argv[s]);
if (settingsFile.size() < 3
|| (settingsFile.substr(settingsFile.size()-3) != ".ot"))
{
std::cerr << "Skipping " << settingsFile
<< ": Only .ot files are supported." << std::endl;
continue;
}
ot::OTData data;
load(settingsFile.c_str(), data);
const std::string name = settingsFile.substr(0, settingsFile.size()-3);
const std::string input = name + ".wav";
for (uint32_t i = 0; i < data.sliceCount; ++i)
{
ot::Slice& s = data.slices[i];
std::ostringstream output;
output << name << std::setw(2) << std::setfill('0') << i << ".wav";
std::cout << input
<< " "
<< output.str()
<< " "
<< "trim "
<< s.startPoint << "s "
<< "=" << s.endPoint << "s "
<< std::endl;
}
}
return 0;
}