git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 7aae816d MB |
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 | ||
| 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 | ||
| c0fa59df MB |
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 | ||
| 7aae816d MB |
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); |