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92 lines
2.1 KiB
92 lines
2.1 KiB
/* |
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** Copyright 2010, The Android Open-Source Project |
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** Copyright (c) 2011, Code Aurora Forum. All rights reserved. |
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** |
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** Licensed under the Apache License, Version 2.0 (the "License"); |
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** you may not use this file except in compliance with the License. |
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** You may obtain a copy of the License at |
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** |
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** http://www.apache.org/licenses/LICENSE-2.0 |
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** |
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** Unless required by applicable law or agreed to in writing, software |
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** distributed under the License is distributed on an "AS IS" BASIS, |
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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** See the License for the specific language governing permissions and |
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** limitations under the License. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <ctype.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <stdint.h> |
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#include <string.h> |
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#include "alsa_audio.h" |
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struct mixer_ctl *get_ctl(struct mixer *mixer, char *name) |
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{ |
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char *p; |
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unsigned idx = 0; |
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if (isdigit(name[0])) |
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return mixer_get_nth_control(mixer, atoi(name) - 1); |
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p = strrchr(name, '#'); |
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if (p) { |
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*p++ = 0; |
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idx = atoi(p); |
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} |
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return mixer_get_control(mixer, name, idx); |
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} |
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int main(int argc, char **argv) |
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{ |
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struct mixer *mixer; |
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struct mixer_ctl *ctl; |
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unsigned value; |
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int r; |
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const char* device = "/dev/snd/controlC0"; |
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mixer = mixer_open(device); |
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if (!mixer){ |
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fprintf(stderr,"oops: %s: %d\n", strerror(errno), __LINE__); |
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return -1; |
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} |
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if (argc == 1) { |
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mixer_dump(mixer); |
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mixer_close(mixer); |
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return 0; |
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} |
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ctl = get_ctl(mixer, argv[1]); |
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argc -= 2; |
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argv += 2; |
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if (!ctl) { |
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fprintf(stderr,"can't find control\n"); |
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mixer_close(mixer); |
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return -1; |
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} |
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if (argc) { |
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if (isdigit(argv[0][0])) |
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r = mixer_ctl_set_value(ctl, argc, argv); |
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else |
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r = mixer_ctl_select(ctl, argv[0]); |
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if (r) |
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fprintf(stderr,"oops: %s: %d\n", strerror(errno), __LINE__); |
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} else { |
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mixer_ctl_get(ctl, &value); |
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} |
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mixer_close(mixer); |
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return 0; |
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}
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