2 * soc-util.c -- ALSA SoC Audio Layer utility functions
4 * Copyright 2009 Wolfson Microelectronics PLC.
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 * Liam Girdwood <lrg@slimlogic.co.uk>
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.
16 #include <sound/core.h>
17 #include <sound/pcm.h>
18 #include <sound/pcm_params.h>
19 #include <sound/soc.h>
21 int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots)
23 return sample_size * channels * tdm_slots;
25 EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size);
27 int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params)
31 switch (params_format(params)) {
32 case SNDRV_PCM_FORMAT_S16_LE:
33 case SNDRV_PCM_FORMAT_S16_BE:
36 case SNDRV_PCM_FORMAT_S20_3LE:
37 case SNDRV_PCM_FORMAT_S20_3BE:
40 case SNDRV_PCM_FORMAT_S24_LE:
41 case SNDRV_PCM_FORMAT_S24_BE:
44 case SNDRV_PCM_FORMAT_S32_LE:
45 case SNDRV_PCM_FORMAT_S32_BE:
52 return snd_soc_calc_frame_size(sample_size, params_channels(params),
55 EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size);
57 int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots)
59 return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots);
61 EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);
63 int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
67 ret = snd_soc_params_to_frame_size(params);
70 return ret * params_rate(params);
74 EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);