av_resample_init 2605 libavcodec/avcodec.h struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
av_resample_init  213 libavcodec/resample.c     s->resample_context= av_resample_init(output_rate, input_rate,