1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/*
* stdout output driver. This file is part of Shairport Sync.
* Copyright (c) Mike Brady 2015
*
* Based on pipe output driver
* Copyright (c) James Laird 2013
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <memory.h>
#include <stdlib.h>
#include <errno.h>
#include "common.h"
#include "audio.h"
static int fd = -1;
static void start(int sample_rate, int sample_format) {
fd = STDOUT_FILENO;
}
static void play(short buf[], int samples) {
int ignore = write(fd, buf, samples * 4);
}
static void stop(void) {
// don't close stdout
}
static int init(int argc, char **argv) {
const char *str;
int value;
double dvalue;
config.audio_backend_buffer_desired_length = 1.0;
config.audio_backend_latency_offset = 0;
if (config.cfg != NULL) {
/* Get the desired buffer size setting. */
if (config_lookup_float(config.cfg,
"stdout.audio_backend_buffer_desired_length", &dvalue)) {
if ((dvalue < 0) || (dvalue > 1.5))
die("Invalid stdout audio backend buffer desired length \"%f\". It "
"should be between 0 and "
"1.5, default is 1.0 second",
dvalue);
else {
config.audio_backend_buffer_desired_length = dvalue;
}
}
/* Get the latency offset. */
if (config_lookup_float(config.cfg, "stdout.audio_backend_latency_offset",
&dvalue)) {
if ((dvalue < -1.0) || (value > 1.5))
die("Invalid stdout audio backend buffer latency offset \"%f\". It "
"should be between -1.0 and +1.5, default is 0 seconds",
dvalue);
else
config.audio_backend_latency_offset = dvalue;
}
}
return 0;
}
static void deinit(void) {
// don't close stdout
}
static void help(void) {
printf(" stdout takes no arguments\n");
}
audio_output audio_stdout = {.name = "stdout",
.help = &help,
.init = &init,
.deinit = &deinit,
.start = &start,
.stop = &stop,
.flush = NULL,
.delay = NULL,
.play = &play,
.volume = NULL,
.parameters = NULL,
.mute = NULL};
|
