1 /* 2 * Copyright (C) 2005, Magnus Hjorth 3 * 4 * This file is part of mhWaveEdit. 5 * 6 * mhWaveEdit is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * mhWaveEdit is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with mhWaveEdit; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA 19 */ 20 21 22 /* Code for "guessing" the real sample rate and total buffer size 23 * without using any special sound driver calls, by logging time 24 * and size of succesful writes. */ 25 26 #ifndef RATEEST_H_INCLUDED 27 #define RATEEST_H_INCLUDED 28 29 #include "main.h" 30 31 /* Reset and setup estimator */ 32 void rateest_init(guint expected_samplerate); 33 /* Call this whenever data has been sent to sound driver */ 34 void rateest_log_data(guint frames); 35 /* Call this to account for data sent earlier */ 36 void rateest_prelog_data(guint frames); 37 /* Number of logged written frames. */ 38 off_t rateest_frames_written(void); 39 /* Estimate of number of actually played frames. */ 40 off_t rateest_frames_played(void); 41 /* Estimate of real sample rate */ 42 gfloat rateest_real_samplerate(void); 43 44 45 #endif 46