1 /***
2 This file is part of PulseAudio.
3
4 PulseAudio is free software; you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as
6 published by the Free Software Foundation; either version 2.1 of the
7 License, or (at your option) any later version.
8
9 PulseAudio is distributed in the hope that it will be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
16 ***/
17
18 #ifdef HAVE_CONFIG_H
19 #include <config.h>
20 #endif
21
22 #include <unistd.h>
23 #include <sys/types.h>
24 #include <errno.h>
25 #include <string.h>
26 #include <stdlib.h>
27 #include <time.h>
28
29 #include <pulsecore/core-util.h>
30 #include <pulsecore/mcalign.h>
31
32 /* A simple program for testing pa_mcalign */
33
main(int argc,char * argv[])34 int main(int argc, char *argv[]) {
35 pa_mempool *p;
36 pa_mcalign *a;
37 pa_memchunk c;
38
39 p = pa_mempool_new(PA_MEM_TYPE_PRIVATE, 0, true);
40
41 a = pa_mcalign_new(11);
42
43 pa_memchunk_reset(&c);
44
45 srand((unsigned) time(NULL));
46
47 for (;;) {
48 ssize_t r;
49 size_t l;
50
51 if (!c.memblock) {
52 c.memblock = pa_memblock_new(p, 2048);
53 c.index = c.length = 0;
54 }
55
56 pa_assert(c.index < pa_memblock_get_length(c.memblock));
57
58 l = pa_memblock_get_length(c.memblock) - c.index;
59
60 l = l <= 1 ? l : (size_t) rand() % (l-1) +1;
61
62 p = pa_memblock_acquire(c.memblock);
63
64 if ((r = read(STDIN_FILENO, (uint8_t*) p + c.index, l)) <= 0) {
65 pa_memblock_release(c.memblock);
66 fprintf(stderr, "read() failed: %s\n", r < 0 ? strerror(errno) : "EOF");
67 break;
68 }
69
70 pa_memblock_release(c.memblock);
71
72 c.length = (size_t) r;
73 pa_mcalign_push(a, &c);
74 fprintf(stderr, "Read %zd bytes\n", r);
75
76 c.index += (size_t) r;
77
78 if (c.index >= pa_memblock_get_length(c.memblock)) {
79 pa_memblock_unref(c.memblock);
80 pa_memchunk_reset(&c);
81 }
82
83 for (;;) {
84 pa_memchunk t;
85
86 if (pa_mcalign_pop(a, &t) < 0)
87 break;
88
89 p = pa_memblock_acquire(t.memblock);
90 pa_loop_write(STDOUT_FILENO, (uint8_t*) p + t.index, t.length, NULL);
91 pa_memblock_release(t.memblock);
92 fprintf(stderr, "Wrote %lu bytes.\n", (unsigned long) t.length);
93
94 pa_memblock_unref(t.memblock);
95 }
96 }
97
98 pa_mcalign_free(a);
99
100 if (c.memblock)
101 pa_memblock_unref(c.memblock);
102
103 pa_mempool_unref(p);
104
105 return 0;
106 }
107