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
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/**
* @file avcodec.c Video codecs using libavcodec
*
* Copyright (C) 2010 Creytiv.com
*/
#include <re.h>
#include <rem.h>
#include <baresip.h>
#include <libavcodec/avcodec.h>
#ifdef USE_X264
#include <x264.h>
#endif
#include "h26x.h"
#include "avcodec.h"
const uint8_t h264_level_idc = 0x0c;
int avcodec_resolve_codecid(const char *s)
{
if (0 == str_casecmp(s, "H263"))
return AV_CODEC_ID_H263;
else if (0 == str_casecmp(s, "H264"))
return AV_CODEC_ID_H264;
else if (0 == str_casecmp(s, "MP4V-ES"))
return AV_CODEC_ID_MPEG4;
else
return AV_CODEC_ID_NONE;
}
static uint32_t packetization_mode(const char *fmtp)
{
struct pl pl, mode;
if (!fmtp)
return 0;
pl_set_str(&pl, fmtp);
if (fmt_param_get(&pl, "packetization-mode", &mode))
return pl_u32(&mode);
return 0;
}
static int h264_fmtp_enc(struct mbuf *mb, const struct sdp_format *fmt,
bool offer, void *arg)
{
struct vidcodec *vc = arg;
const uint8_t profile_idc = 0x42; /* baseline profile */
const uint8_t profile_iop = 0x80;
(void)offer;
if (!mb || !fmt || !vc)
return 0;
return mbuf_printf(mb, "a=fmtp:%s"
" packetization-mode=0"
";profile-level-id=%02x%02x%02x"
"\r\n",
fmt->id, profile_idc, profile_iop, h264_level_idc);
}
static bool h264_fmtp_cmp(const char *fmtp1, const char *fmtp2, void *data)
{
(void)data;
return packetization_mode(fmtp1) == packetization_mode(fmtp2);
}
static int h263_fmtp_enc(struct mbuf *mb, const struct sdp_format *fmt,
bool offer, void *arg)
{
(void)offer;
(void)arg;
if (!mb || !fmt)
return 0;
return mbuf_printf(mb, "a=fmtp:%s CIF=1;CIF4=1\r\n", fmt->id);
}
static int mpg4_fmtp_enc(struct mbuf *mb, const struct sdp_format *fmt,
bool offer, void *arg)
{
(void)offer;
(void)arg;
if (!mb || !fmt)
return 0;
return mbuf_printf(mb, "a=fmtp:%s profile-level-id=3\r\n", fmt->id);
}
static struct vidcodec h264 = {
LE_INIT,
NULL,
"H264",
"packetization-mode=0",
NULL,
encode_update,
#ifdef USE_X264
encode_x264,
#else
encode,
#endif
decode_update,
decode_h264,
h264_fmtp_enc,
h264_fmtp_cmp,
};
static struct vidcodec h263 = {
LE_INIT,
"34",
"H263",
NULL,
NULL,
encode_update,
encode,
decode_update,
decode_h263,
h263_fmtp_enc,
NULL,
};
static struct vidcodec mpg4 = {
LE_INIT,
NULL,
"MP4V-ES",
NULL,
NULL,
encode_update,
encode,
decode_update,
decode_mpeg4,
mpg4_fmtp_enc,
NULL,
};
static int module_init(void)
{
#ifdef USE_X264
debug("avcodec: x264 build %d\n", X264_BUILD);
#else
debug("avcodec: using libavcodec H.264 encoder\n");
#endif
#if LIBAVCODEC_VERSION_INT < ((53<<16)+(10<<8)+0)
avcodec_init();
#endif
avcodec_register_all();
if (avcodec_find_decoder(AV_CODEC_ID_H264))
vidcodec_register(&h264);
if (avcodec_find_decoder(AV_CODEC_ID_H263))
vidcodec_register(&h263);
if (avcodec_find_decoder(AV_CODEC_ID_MPEG4))
vidcodec_register(&mpg4);
return 0;
}
static int module_close(void)
{
vidcodec_unregister(&mpg4);
vidcodec_unregister(&h263);
vidcodec_unregister(&h264);
return 0;
}
EXPORT_SYM const struct mod_export DECL_EXPORTS(avcodec) = {
"avcodec",
"codec",
module_init,
module_close
};
|
