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/*
* soc-util.c -- ALSA SoC Audio Layer utility functions
*
* Copyright 2009 Wolfson Microelectronics PLC.
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
* Liam Girdwood <lrg@slimlogic.co.uk>
*
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots)
{
return sample_size * channels * tdm_slots;
}
EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size);
int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params)
{
int sample_size;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
case SNDRV_PCM_FORMAT_S16_BE:
sample_size = 16;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
case SNDRV_PCM_FORMAT_S20_3BE:
sample_size = 20;
break;
case SNDRV_PCM_FORMAT_S24_LE:
case SNDRV_PCM_FORMAT_S24_BE:
sample_size = 24;
break;
case SNDRV_PCM_FORMAT_S32_LE:
case SNDRV_PCM_FORMAT_S32_BE:
sample_size = 32;
break;
default:
return -ENOTSUPP;
}
return snd_soc_calc_frame_size(sample_size, params_channels(params),
1);
}
EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size);
int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots)
{
return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots);
}
EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);
int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
{
int ret;
ret = snd_soc_params_to_frame_size(params);
if (ret > 0)
return ret * params_rate(params);
else
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);
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