1 /* 2 * soc-util.c -- ALSA SoC Audio Layer utility functions 3 * 4 * Copyright 2009 Wolfson Microelectronics PLC. 5 * 6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7 * Liam Girdwood <lrg@slimlogic.co.uk> 8 * 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 14 */ 15 16 #include <sound/core.h> 17 #include <sound/pcm.h> 18 #include <sound/pcm_params.h> 19 #include <sound/soc.h> 20 21 int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots) 22 { 23 return sample_size * channels * tdm_slots; 24 } 25 EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size); 26 27 int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params) 28 { 29 int sample_size; 30 31 sample_size = snd_pcm_format_width(params_format(params)); 32 if (sample_size < 0) 33 return sample_size; 34 35 return snd_soc_calc_frame_size(sample_size, params_channels(params), 36 1); 37 } 38 EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size); 39 40 int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots) 41 { 42 return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots); 43 } 44 EXPORT_SYMBOL_GPL(snd_soc_calc_bclk); 45 46 int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params) 47 { 48 int ret; 49 50 ret = snd_soc_params_to_frame_size(params); 51 52 if (ret > 0) 53 return ret * params_rate(params); 54 else 55 return ret; 56 } 57 EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk); 58