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#include <algorithm>
#include "SampleStream.h"
#include "SampleBlock.h"
using std::string;
using std::min;
SampleStream::SampleStream(string input_stream) {
load(input_stream);
// test direct sample editing:
// std::transform(_stream.begin(), _stream.end(), _stream.begin(), [](int16_t s) { return s/2; });
}
void SampleStream::load(string input) {
_stream.clear();
for (unsigned long i = 0; i < input.size(); i += 2)
_stream.push_back(((input[i] & 0xff) << 0) | ((input[i+1] & 0xff) << 8));
}
string SampleStream::save() {
string out;
for (int16_t sample : _stream) {
out.push_back((sample >> 0) & 0xff);
out.push_back((sample >> 8) & 0xff);
}
return out;
}
vector<SampleBlock> SampleStream::split(unsigned long block_size) {
vector<SampleBlock> out;
unsigned long stream_size = _stream.size();
for (unsigned long i = 0; i < stream_size; i += block_size) {
unsigned long begin_offset = i;
unsigned long end_offset = min(i + block_size, stream_size);
SampleBlock block(_stream.begin() + begin_offset, _stream.begin() + end_offset);
out.push_back(block);
}
return out;
}
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