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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
Copyright (C) 2009-2015 Red Hat, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <sys/select.h>
#include <sys/time.h>
#include <math.h>
#include <spice.h>
#include "basic_event_loop.h"
/* test the audio playback interface. Really basic no frils test - create
* a single tone sinus sound (easy to hear clicks if it is generated badly
* or is transmitted badly).
*
* TODO: Was going to do white noise to test compression too.
*
* TODO: gstreamer based test (could be used to play music files so
* it has actual merit. Also possibly to simulate network effects?)
* */
SpicePlaybackInstance playback_instance;
static const SpiceBaseInterface base = {
.type = SPICE_INTERFACE_PLAYBACK,
.description = "test playback",
.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
};
uint32_t *frame;
uint32_t num_samples;
SpiceTimer *playback_timer;
int playback_timer_ms;
SpiceCoreInterface *core;
static void get_frame(void)
{
if (frame) {
return;
}
spice_server_playback_get_buffer(&playback_instance, &frame, &num_samples);
playback_timer_ms = num_samples
? 1000 * num_samples / SPICE_INTERFACE_PLAYBACK_FREQ
: 100;
}
void playback_timer_cb(SPICE_GNUC_UNUSED void *opaque)
{
static int t = 0;
static uint64_t last_sent_usec = 0;
static uint64_t samples_to_send;
uint32_t i;
struct timeval cur;
uint64_t cur_usec;
get_frame();
if (!frame) {
/* continue waiting until there is a channel */
core->timer_start(playback_timer, 100);
return;
}
/* we have a channel */
gettimeofday(&cur, NULL);
cur_usec = cur.tv_usec + cur.tv_sec * 1e6;
if (last_sent_usec == 0) {
samples_to_send = num_samples;
} else {
samples_to_send += (cur_usec - last_sent_usec) * SPICE_INTERFACE_PLAYBACK_FREQ / 1e6;
}
last_sent_usec = cur_usec;
while (samples_to_send > num_samples && frame) {
#if 0
printf("samples_to_send = %d\n", samples_to_send);
#endif
samples_to_send -= num_samples;
for (i = 0 ; i < num_samples; ++i) {
frame[i] = (((uint16_t)((1<<14)*sin((t+i)/10))) << 16) + (((uint16_t)((1<<14)*sin((t+i)/10))));
}
t += num_samples;
if (frame) {
spice_server_playback_put_samples(&playback_instance, frame);
frame = NULL;
}
get_frame();
}
core->timer_start(playback_timer, playback_timer_ms);
}
int main(void)
{
SpiceServer *server = spice_server_new();
core = basic_event_loop_init();
spice_server_set_port(server, 5701);
spice_server_set_noauth(server);
spice_server_init(server, core);
playback_instance.base.sif = &base;
spice_server_add_interface(server, &playback_instance.base);
spice_server_playback_start(&playback_instance);
playback_timer_ms = 100;
playback_timer = core->timer_add(playback_timer_cb, NULL);
core->timer_start(playback_timer, playback_timer_ms);
basic_event_loop_mainloop();
return 0;
}
|
