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0129db08 JL |
1 | /* |
2 | * pipe output driver. This file is part of Shairport. | |
3 | * Copyright (c) James Laird 2013 | |
4 | * All rights reserved. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person | |
7 | * obtaining a copy of this software and associated documentation | |
8 | * files (the "Software"), to deal in the Software without | |
9 | * restriction, including without limitation the rights to use, | |
10 | * copy, modify, merge, publish, distribute, sublicense, and/or | |
11 | * sell copies of the Software, and to permit persons to whom the | |
12 | * Software is furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be | |
15 | * included in all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
18 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES | |
19 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
20 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT | |
21 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
22 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
23 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
24 | * OTHER DEALINGS IN THE SOFTWARE. | |
25 | */ | |
26 | ||
27 | #include <stdio.h> | |
28 | #include <unistd.h> | |
29 | #include <fcntl.h> | |
30 | #include <memory.h> | |
2e27c885 | 31 | #include <stdlib.h> |
0129db08 JL |
32 | #include "common.h" |
33 | #include "audio.h" | |
34 | ||
28a5afc9 | 35 | static int fd = -1; |
0129db08 JL |
36 | |
37 | char *pipename = NULL; | |
38 | ||
39 | static void start(int sample_rate) { | |
40 | fd = open(pipename, O_WRONLY); | |
41 | if (fd < 0) { | |
42 | perror("open"); | |
43 | die("could not open specified pipe for writing"); | |
44 | } | |
45 | } | |
46 | ||
47 | static void play(short buf[], int samples) { | |
2e27c885 | 48 | int ignore = write(fd, buf, samples*4); |
0129db08 JL |
49 | } |
50 | ||
51 | static void stop(void) { | |
52 | close(fd); | |
53 | } | |
54 | ||
e4804a57 | 55 | static int init(int argc, char **argv, config_t *cfgp) { |
0129db08 JL |
56 | if (argc != 1) |
57 | die("bad argument(s) to pipe"); | |
58 | ||
59 | pipename = strdup(argv[0]); | |
60 | ||
61 | // test open pipe so we error on startup if it's going to fail | |
62 | start(44100); | |
63 | stop(); | |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
68 | static void deinit(void) { | |
69 | if (fd > 0) | |
70 | close(fd); | |
71 | if (pipename) | |
72 | free(pipename); | |
73 | } | |
74 | ||
75 | static void help(void) { | |
a38a03ed | 76 | printf(" pipe takes 1 argument: the name of the FIFO to write to.\n"); |
0129db08 JL |
77 | } |
78 | ||
79 | audio_output audio_pipe = { | |
80 | .name = "pipe", | |
81 | .help = &help, | |
82 | .init = &init, | |
83 | .deinit = &deinit, | |
84 | .start = &start, | |
85 | .stop = &stop, | |
28a5afc9 MB |
86 | .flush = NULL, |
87 | .delay = NULL, | |
0129db08 | 88 | .play = &play, |
a2790fc1 MB |
89 | .volume = NULL, |
90 | .parameters = NULL | |
0129db08 | 91 | }; |