#include <deque>
#include <memory>
+#include "defs.h"
+
class ResamplingQueue {
public:
// card_num is for debugging outputs only.
ResamplingQueue(unsigned card_num, unsigned freq_in, unsigned freq_out, unsigned num_channels = 2);
+ // If policy is DO_NOT_ADJUST_RATE, the resampling rate will not be changed.
+ // This is primarily useful if you have an extraordinary situation, such as
+ // dropped frames.
+ enum RateAdjustmentPolicy {
+ DO_NOT_ADJUST_RATE,
+ ADJUST_RATE
+ };
+
// Note: pts is always in seconds.
void add_input_samples(double pts, const float *samples, ssize_t num_samples);
- bool get_output_samples(double pts, float *samples, ssize_t num_samples); // Returns false if underrun.
+ // Returns false if underrun.
+ bool get_output_samples(double pts, float *samples, ssize_t num_samples, RateAdjustmentPolicy rate_adjustment_policy);
private:
void init_loop_filter(double bandwidth_hz);
// How much delay we are expected to have, in input samples.
// If actual delay drifts too much away from this, we will start
// changing the resampling ratio to compensate.
- double expected_delay = 4800.0;
+ double expected_delay = OUTPUT_FREQUENCY * 0.1; // 100 ms.
// Input samples not yet fed into the resampler.
// TODO: Use a circular buffer instead, for efficiency.