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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
#include "pulseout.h"
#include <stdbool.h>
#include <stdlib.h>
#include <pulse/thread-mainloop.h>
#include <pulse/stream.h>
struct pulseout_state {
struct sound_state ss;
bool paused;
bool flush;
unsigned srate;
sound_callback cbfunc;
void *userptr;
pa_threaded_mainloop *pa_tm;
pa_context *pa_c;
pa_stream *pa_s;
bool pa_status_changed;
};
#include <stdio.h>
static void pulseout_success_cb(pa_stream *s, int success, void *userdata) {
(void)s;
(void)success;
struct pulseout_state *ps = userdata;
pa_threaded_mainloop_signal(ps->pa_tm, 0);
}
static void pulseout_pause(struct sound_state *ss, int pause, int flush) {
struct pulseout_state *ps = (struct pulseout_state *)ss;
if (ps->paused != !!pause) {
if (pause) {
pa_threaded_mainloop_lock(ps->pa_tm);
pa_operation *op_cork = pa_stream_cork(ps->pa_s, 1, pulseout_success_cb, ps);
while (pa_operation_get_state(op_cork) == PA_OPERATION_RUNNING)
pa_threaded_mainloop_wait(ps->pa_tm);
pa_operation_unref(op_cork);
}
ps->paused = pause;
if (!pause) {
//if (flush) ps->flush = true;
if (flush) {
pa_operation *op_flush = pa_stream_flush(ps->pa_s, pulseout_success_cb, ps);
if (op_flush) {
while (pa_operation_get_state(op_flush) == PA_OPERATION_RUNNING)
pa_threaded_mainloop_wait(ps->pa_tm);
pa_operation_unref(op_flush);
} else {
fprintf(stderr, "FLUSH ERR\n");
}
}
pa_operation *op_cork = pa_stream_cork(ps->pa_s, 0, pulseout_success_cb, ps);
if (op_cork) {
while (pa_operation_get_state(op_cork) == PA_OPERATION_RUNNING)
pa_threaded_mainloop_wait(ps->pa_tm);
pa_operation_unref(op_cork);
} else {
fprintf(stderr, "CORK ERR\n");
}
pa_threaded_mainloop_unlock(ps->pa_tm);
}
}
}
static void pulseout_free(struct sound_state *ss) {
struct pulseout_state *ps = (struct pulseout_state *)ss;
if (ps) {
if (ps->pa_tm) {
if (ps->paused) pa_threaded_mainloop_unlock(ps->pa_tm);
pa_threaded_mainloop_stop(ps->pa_tm);
if (ps->pa_s) {
pa_stream_disconnect(ps->pa_s);
pa_stream_unref(ps->pa_s);
}
if (ps->pa_c) pa_context_unref(ps->pa_c);
pa_threaded_mainloop_free(ps->pa_tm);
}
free(ps);
}
}
static void pulseout_cb(pa_stream *p, size_t bytes, void *userdata) {
struct pulseout_state *ps = userdata;
int16_t *buf;
pa_stream_begin_write(p, (void **)&buf, &bytes);
size_t nframes = bytes / (2 * sizeof(int16_t));
if (!ps->paused) {
ps->cbfunc(ps->userptr, buf, nframes);
} else {
for (size_t i = 0; i < nframes; i++) {
buf[i*2+0] = 0;
buf[i*2+1] = 0;
}
}
pa_seek_mode_t smode =
ps->flush ? PA_SEEK_RELATIVE_ON_READ : PA_SEEK_RELATIVE;
pa_stream_write(p, buf, nframes * 2 * sizeof(int16_t), 0, 0, smode);
ps->flush = false;
}
static void pa_c_cb(pa_context *pa_c, void *userdata) {
(void)pa_c;
struct pulseout_state *ps = userdata;
ps->pa_status_changed = true;
pa_threaded_mainloop_signal(ps->pa_tm, 0);
}
struct sound_state *pulseout_init(
const char *clientname, unsigned srate,
sound_callback cbfunc, void *userptr) {
struct pulseout_state *ps = malloc(sizeof(*ps));
if (!ps) goto err;
*ps = (struct pulseout_state){
.ss = {
.pause = pulseout_pause,
.free = pulseout_free,
.apiname = "PulseAudio",
},
.cbfunc = cbfunc,
.userptr = userptr,
.paused = false,
.srate = srate,
};
ps->pa_tm = pa_threaded_mainloop_new();
if (!ps->pa_tm) goto err;
ps->pa_c = pa_context_new(
pa_threaded_mainloop_get_api(ps->pa_tm), clientname
);
if (!ps->pa_c) goto err;
if (pa_context_connect(ps->pa_c, 0, 0, 0) < 0) goto err;
pa_context_set_state_callback(ps->pa_c, pa_c_cb, ps);
if (pa_threaded_mainloop_start(ps->pa_tm) < 0) goto err;
pa_threaded_mainloop_lock(ps->pa_tm);
ps->paused = true;
for (;;) {
while (!ps->pa_status_changed) {
pa_threaded_mainloop_wait(ps->pa_tm);
}
ps->pa_status_changed = false;
pa_context_state_t state = pa_context_get_state(ps->pa_c);
if (state == PA_CONTEXT_CONNECTING ||
state == PA_CONTEXT_AUTHORIZING ||
state == PA_CONTEXT_SETTING_NAME) continue;
else if (state == PA_CONTEXT_READY) break;
else goto err;
}
pa_sample_spec ss = {
.format = PA_SAMPLE_S16NE,
.rate = ps->srate,
.channels = 2,
};
ps->pa_s = pa_stream_new(
ps->pa_c,
"stereoout", &ss, 0
);
if (!ps->pa_s) goto err;
pa_stream_set_write_callback(ps->pa_s, pulseout_cb, ps);
if (pa_stream_connect_playback(ps->pa_s, 0, 0, 0, 0, 0) < 0) goto err;
return &ps->ss;
err:
pulseout_free(&ps->ss);
return 0;
}
|
