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
|
#include "opusencoder.h"
#include <string.h>
#include <stdio.h>
#define OPUS_BITRATE 64000
#define OPUS_FRAME_SIZE 10
OpusEncoder::OpusEncoder()
: cache(5760 * 10)
{
int err = 0;
encoder = opus_encoder_create(16000, 1, OPUS_APPLICATION_AUDIO, &err);
if(!encoder || err != OPUS_OK) {
printf("opus_encoder_create: %d\n", err);
}
opus_encoder_ctl(encoder, OPUS_SET_BITRATE(OPUS_BITRATE));
opus_encoder_ctl(encoder, OPUS_SET_COMPLEXITY(10));
}
OpusEncoder::~OpusEncoder()
{
if(encoder) opus_encoder_destroy(encoder);
}
unsigned int OpusEncoder::framesize()
{
return 16000 / 1000 * OPUS_FRAME_SIZE;
}
framelist_t OpusEncoder::encode(const char *pcm, size_t size)
{
framelist_t list;
if(encoder == NULL) {
printf("encoder == NULL\n");
}
size_t bytes_per_packet = ((OPUS_BITRATE *framesize())/16000+4)/8;
cache.addSamples((short*)pcm, size / sizeof(short));
opus_int16 *samples = new opus_int16[framesize()];
while(cache.cacheSize() >= framesize()) {
size_t sz = cache.getSamples(samples, framesize());
Frame *frame = new Frame(bytes_per_packet);
int n = opus_encode(encoder, samples, sz / 1,
(unsigned char *)frame->data, (opus_int32)frame->size);
if(n < 0) {
printf("opus_encode: %d\n", n);
}
frame->size = n;
list.push_back(frame);
}
delete[] samples;
return list;
}
|