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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 | ||
3d8b2ce0 MB |
31 | sample_size = snd_pcm_format_width(params_format(params)); |
32 | if (sample_size < 0) | |
33 | return sample_size; | |
7aae816d MB |
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 | ||
c0fa59df MB |
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 | ||
7aae816d MB |
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); |