c0fa59df72
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/*
|
|
* 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);
|