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Eliminated foolish double indirection on phase history.

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This commit is contained in:
Thomas Harte 2017-07-15 22:40:38 -04:00
parent 253f9603ed
commit 4489f120f9
2 changed files with 6 additions and 8 deletions
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12
Storage/Disk/DigitalPhaseLockedLoop.cpp
View File

@ -17,9 +17,8 @@ DigitalPhaseLockedLoop::DigitalPhaseLockedLoop(int clocks_per_bit, int tolerance
tolerance_(tolerance),
phase_(0),
window_length_(clocks_per_bit),
phase_error_pointer_(0) {
phase_error_history_.reset(new std::vector<int>(length_of_history, 0));
}
phase_error_pointer_(0),
phase_error_history_(length_of_history, 0) {}
void DigitalPhaseLockedLoop::run_for_cycles(int number_of_cycles) {
phase_ += number_of_cycles;
@ -51,15 +50,14 @@ void DigitalPhaseLockedLoop::post_phase_error(int error) {
phase_ -= (error + 1) >> 1;
// use the average of the last few errors to affect frequency
std::vector<int> *phase_error_history = phase_error_history_.get();
size_t phase_error_history_size = phase_error_history->size();
size_t phase_error_history_size = phase_error_history_.size();
(*phase_error_history)[phase_error_pointer_] = error;
phase_error_history_[phase_error_pointer_] = error;
phase_error_pointer_ = (phase_error_pointer_ + 1)%phase_error_history_size;
int total_error = 0;
for(size_t c = 0; c < phase_error_history_size; c++) {
total_error += (*phase_error_history)[c];
total_error += phase_error_history_[c];
}
int denominator = (int)(phase_error_history_size * 4);
window_length_ += (total_error + (denominator >> 1)) / denominator;

2
Storage/Disk/DigitalPhaseLockedLoop.hpp
View File

@ -52,7 +52,7 @@ class DigitalPhaseLockedLoop {
Delegate *delegate_;
void post_phase_error(int error);
std::unique_ptr<std::vector<int>> phase_error_history_;
std::vector<int> phase_error_history_;
size_t phase_error_pointer_;
int phase_;