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
|
/* ------------------------------------------------------------------
* Copyright (C) 2011 Martin Storsjo
* Copyright (C) 2019 Matthias P. Braendli
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied.
* See the License for the specific language governing permissions
* and limitations under the License.
* -------------------------------------------------------------------
*/
#pragma once
#include <vector>
#include <deque>
#include <cstdint>
#include <cstddef>
#include <cstdio>
#include "common.h"
#include "zmq.hpp"
extern "C" {
#include "encryption.h"
}
namespace Output {
/*! \file Outputs.h
*
* Declaration of all outputs
*/
class Base {
public:
virtual ~Base() {};
/*! Write a buffer of encoded data to the output */
virtual bool write_frame(const uint8_t *buf, size_t len) = 0;
/*! Update peak audio level information */
virtual void update_audio_levels(
int16_t audiolevel_left, int16_t audiolevel_right);
protected:
int16_t m_audio_left = 0;
int16_t m_audio_right = 0;
};
class File : public Base {
public:
File(const char *filename);
File(FILE *file);
File(const File&) = delete;
File& operator=(const File&) = delete;
virtual ~File() override;
virtual bool write_frame(const uint8_t *buf, size_t len) override;
private:
FILE *m_fd = nullptr;
};
/*! This defines the on-wire representation of a ZMQ message header.
* It must be compatible with the definition in ODR-DabMux.
*
* The data follows right after this header */
struct zmq_frame_header_t
{
uint16_t version; // we support version=1 now
uint16_t encoder; // see ZMQ_ENCODER_XYZ
/* length of the 'data' field */
uint32_t datasize;
/* Audio level, peak, linear PCM */
int16_t audiolevel_left;
int16_t audiolevel_right;
/* Data follows this header */
} __attribute__ ((packed));
#define ZMQ_ENCODER_FDK 1
#define ZMQ_ENCODER_TOOLAME 2
#define ZMQ_HEADER_SIZE sizeof(struct zmq_frame_header_t)
/* The expected frame size incl data of the given frame */
#define ZMQ_FRAME_SIZE(f) (sizeof(struct zmq_frame_header_t) + f->datasize)
#define ZMQ_FRAME_DATA(f) ( ((uint8_t*)f)+sizeof(struct zmq_frame_header_t) )
class ZMQ: public Base {
public:
ZMQ();
ZMQ(const ZMQ&) = delete;
ZMQ& operator=(const ZMQ&) = delete;
virtual ~ZMQ() override;
void connect(const char *uri, const char *keyfile);
void set_encoder_type(encoder_selection_t& enc, int bitrate);
virtual bool write_frame(const uint8_t *buf, size_t len) override;
private:
virtual bool write_toolame(const uint8_t *buf, size_t len);
virtual bool send_frame(const uint8_t *buf, size_t len);
zmq::context_t m_ctx;
zmq::socket_t m_sock;
int m_bitrate = 0;
char m_secretkey[CURVE_KEYLEN+1];
encoder_selection_t m_encoder = encoder_selection_t::fdk_dabplus;
using vec_u8 = std::vector<uint8_t>;
vec_u8 m_framebuf;
std::deque<uint8_t> m_toolame_buffer;
};
}
|
