Git Repo - linux.git/blame_incremental

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Commit	Line	Data
	1	/*
	2	* soc-util.c -- ALSA SoC Audio Layer utility functions
	3	*
	4	* Copyright 2009 Wolfson Microelectronics PLC.
	5	*
	6	* Author: Mark Brown <[email protected]>
	7	* Liam Girdwood <[email protected]>
	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	switch (params_format(params)) {
	32	case SNDRV_PCM_FORMAT_S16_LE:
	33	case SNDRV_PCM_FORMAT_S16_BE:
	34	sample_size = 16;
	35	break;
	36	case SNDRV_PCM_FORMAT_S20_3LE:
	37	case SNDRV_PCM_FORMAT_S20_3BE:
	38	sample_size = 20;
	39	break;
	40	case SNDRV_PCM_FORMAT_S24_LE:
	41	case SNDRV_PCM_FORMAT_S24_BE:
	42	sample_size = 24;
	43	break;
	44	case SNDRV_PCM_FORMAT_S32_LE:
	45	case SNDRV_PCM_FORMAT_S32_BE:
	46	sample_size = 32;
	47	break;
	48	default:
	49	return -ENOTSUPP;
	50	}
	51
	52	return snd_soc_calc_frame_size(sample_size, params_channels(params),
	53	1);
	54	}
	55	EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size);
	56
	57	int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots)
	58	{
	59	return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots);
	60	}
	61	EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);
	62
	63	int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
	64	{
	65	int ret;
	66
	67	ret = snd_soc_params_to_frame_size(params);
	68
	69	if (ret > 0)
	70	return ret * params_rate(params);
	71	else
	72	return ret;
	73	}
	74	EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);