ipv4: Don't drop redirected route cache entry unless PTMU actually expired
[linux-2.6.git] / sound / soc / soc-utils.c
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
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);