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
|
/* opusdecode.c
* opus codec
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <stdlib.h>
#include "opus/opus.h"
#include "wsutil/codecs.h"
#include "ws_attributes.h"
void codec_register_opus(void);
static void *
codec_opus_init(void)
{
OpusDecoder *state;
int err = OPUS_INTERNAL_ERROR;
/* always use maximum 48000 to cover all 8k/12k/16k/24k/48k */
state = opus_decoder_create(48000, 1, &err);
return state;
}
static void
codec_opus_release(void *ctx)
{
OpusDecoder* state = (OpusDecoder*)ctx;
if (!state) {
return; /* out-of-memory; */
}
opus_decoder_destroy(state);
}
static unsigned
codec_opus_get_channels(void *ctx _U_)
{
return 1;
}
static unsigned
codec_opus_get_frequency(void *ctx _U_)
{
/* although can set kinds of fs, but we set 48K now */
return 48000;
}
static size_t
codec_opus_decode(void *ctx , const void *input, size_t inputSizeBytes,
void *output, size_t *outputSizeBytes )
{
OpusDecoder *state = (OpusDecoder *)ctx;
if (!ctx) {
return 0; /* out-of-memory */
}
// reserve space for the first time
if (!output || !outputSizeBytes) {
return 1920;
}
const unsigned char *data = (const unsigned char *)input;
opus_int32 len= (opus_int32)inputSizeBytes;
opus_int16 *pcm = (opus_int16*)(output);
int frame_size = 960;
int ret = opus_decode(state, data, len, pcm, frame_size, 0);
if (ret < 0) {
return 0;
}
*outputSizeBytes = ret * 2;
return *outputSizeBytes;
}
void
codec_register_opus(void)
{
register_codec("opus", codec_opus_init, codec_opus_release,
codec_opus_get_channels, codec_opus_get_frequency, codec_opus_decode);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
|
