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
|
#include "input/shmem.h"
#include "input/common.h"
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
typedef unsigned int u32_t;
typedef short s16_t;
// #define BUFSIZE 1024
#define BUFSIZE 2048
int rc;
#define VIS_BUF_SIZE 16384
#define VB_OFFSET 8192 + 4096
typedef struct {
pthread_rwlock_t rwlock;
u32_t buf_size;
u32_t buf_index;
bool running;
u32_t rate;
time_t updated;
s16_t buffer[VIS_BUF_SIZE];
} vis_t;
// input: SHMEM
void *input_shmem(void *data) {
struct audio_data *audio = (struct audio_data *)data;
vis_t *mmap_area;
int fd; /* file descriptor to mmaped area */
int mmap_count = sizeof(vis_t);
printf("input_shmem: source: %s", audio->source);
fd = shm_open(audio->source, O_RDWR, 0666);
if (fd < 0) {
printf("Could not open source '%s': %s\n", audio->source, strerror(errno));
exit(EXIT_FAILURE);
} else {
mmap_area = mmap(NULL, sizeof(vis_t), PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if ((intptr_t)mmap_area == -1) {
printf("mmap failed - check if squeezelite is running with visualization enabled\n");
exit(EXIT_FAILURE);
}
}
// printf("bufs: %u / run: %u / rate: %u\n",mmap_area->buf_size, mmap_area->running,
// mmap_area->rate);
audio->rate = mmap_area->rate;
while (!audio->terminate) {
write_to_fftw_input_buffers(mmap_area->buffer, BUFSIZE, audio);
/*
for (i = VB_OFFSET; i < BUFSIZE+VB_OFFSET; i += 2) {
if (audio->channels == 1) {
audio->audio_out_l[n] = (mmap_area->buffer[i] +
mmap_area->buffer[i + 1]) / 2; } else if (audio->channels == 2) { audio->audio_out_l[n] =
mmap_area->buffer[i]; audio->audio_out_r[n] = mmap_area->buffer[i + 1];
}
n++;
if (n == audio->FFTbufferSize - 1) n = 0;
}
*/
}
// cleanup
if (fd > 0) {
if (close(fd) != 0) {
printf("Could not close file descriptor %d: %s", fd, strerror(errno));
}
} else {
printf("Wrong file descriptor %d", fd);
}
if (munmap(mmap_area, mmap_count) != 0) {
printf("Could not munmap() area %p+%d. %s", mmap_area, mmap_count, strerror(errno));
}
return 0;
}
|
