46                     void * output_buffer, long frames_needed) = 0;
378   T * output(uint32_t frames_needed)  in output()  argument
380     if (delay_output_buffer.capacity() < frames_to_samples(frames_needed)) {  in output()
381       delay_output_buffer.reserve(frames_to_samples(frames_needed));  in output()
386                              frames_to_samples(frames_needed));  in output()
387     delay_input_buffer.pop(nullptr, frames_to_samples(frames_needed));  in output()
396   T * input_buffer(uint32_t frames_needed)  in input_buffer()  argument
399     delay_input_buffer.reserve(leftover_samples + frames_to_samples(frames_needed));  in input_buffer()
413   size_t output(T * output_buffer, uint32_t frames_needed)  in output()  argument
416     uint32_t out_len = frames_needed;  in output()
429   size_t input_needed_for_output(uint32_t frames_needed)  in input_needed_for_output()  argument
431     return frames_needed;  in input_needed_for_output()