xref: /openbmc/linux/sound/soc/soc-utils.c (revision 565d76cb)
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