av_audio_fifo_peek_at  103 libavfilter/f_loop.c         ret = av_audio_fifo_peek_at(s->fifo, (void **)out->extended_data, out->nb_samples, s->current_sample);
av_audio_fifo_peek_at  128 libavutil/audio_fifo.h int av_audio_fifo_peek_at(AVAudioFifo *af, void **data, int nb_samples, int offset);
av_audio_fifo_peek_at  168 libavutil/tests/audio_fifo.c         ret = av_audio_fifo_peek_at(afifo, output_data, 1, i);