1 /* tinypcminfo.c
2 **
3 ** Copyright 2012, The Android Open Source Project
4 **
5 ** Redistribution and use in source and binary forms, with or without
6 ** modification, are permitted provided that the following conditions are met:
7 ** * Redistributions of source code must retain the above copyright
8 ** notice, this list of conditions and the following disclaimer.
9 ** * Redistributions in binary form must reproduce the above copyright
10 ** notice, this list of conditions and the following disclaimer in the
11 ** documentation and/or other materials provided with the distribution.
12 ** * Neither the name of The Android Open Source Project nor the names of
13 ** its contributors may be used to endorse or promote products derived
14 ** from this software without specific prior written permission.
15 **
16 ** THIS SOFTWARE IS PROVIDED BY The Android Open Source Project ``AS IS'' AND
17 ** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 ** ARE DISCLAIMED. IN NO EVENT SHALL The Android Open Source Project BE LIABLE
20 ** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 ** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 ** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
23 ** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 ** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
26 ** DAMAGE.
27 */
28
29 #include <tinyalsa/asoundlib.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33
main(int argc,char ** argv)34 int main(int argc, char **argv)
35 {
36 unsigned int device = 0;
37 unsigned int card = 0;
38 int i;
39
40 if (argc < 3) {
41 fprintf(stderr, "Usage: %s -D card -d device\n", argv[0]);
42 return 1;
43 }
44
45 /* parse command line arguments */
46 argv += 1;
47 while (*argv) {
48 if (strcmp(*argv, "-D") == 0) {
49 argv++;
50 if (*argv)
51 card = atoi(*argv);
52 }
53 if (strcmp(*argv, "-d") == 0) {
54 argv++;
55 if (*argv)
56 device = atoi(*argv);
57 }
58 if (*argv)
59 argv++;
60 }
61
62 printf("Info for card %d, device %d:\n", card, device);
63
64 for (i = 0; i < 2; i++) {
65 struct pcm_params *params;
66 unsigned int min;
67 unsigned int max;
68
69 printf("\nPCM %s:\n", i == 0 ? "out" : "in");
70
71 params = pcm_params_get(card, device, i == 0 ? PCM_OUT : PCM_IN);
72 if (params == NULL) {
73 printf("Device does not exist.\n");
74 continue;
75 }
76
77 min = pcm_params_get_min(params, PCM_PARAM_RATE);
78 max = pcm_params_get_max(params, PCM_PARAM_RATE);
79 printf(" Rate:\tmin=%uHz\tmax=%uHz\n", min, max);
80 min = pcm_params_get_min(params, PCM_PARAM_CHANNELS);
81 max = pcm_params_get_max(params, PCM_PARAM_CHANNELS);
82 printf(" Channels:\tmin=%u\t\tmax=%u\n", min, max);
83 min = pcm_params_get_min(params, PCM_PARAM_SAMPLE_BITS);
84 max = pcm_params_get_max(params, PCM_PARAM_SAMPLE_BITS);
85 printf(" Sample bits:\tmin=%u\t\tmax=%u\n", min, max);
86 min = pcm_params_get_min(params, PCM_PARAM_PERIOD_SIZE);
87 max = pcm_params_get_max(params, PCM_PARAM_PERIOD_SIZE);
88 printf(" Period size:\tmin=%u\t\tmax=%u\n", min, max);
89 min = pcm_params_get_min(params, PCM_PARAM_PERIODS);
90 max = pcm_params_get_max(params, PCM_PARAM_PERIODS);
91 printf("Period count:\tmin=%u\t\tmax=%u\n", min, max);
92
93 pcm_params_free(params);
94 }
95
96 return 0;
97 }
98