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 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
