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
|
/*
* Copyright 2003-2018 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* necessary because libavutil/common.h uses UINT64_C */
#define __STDC_CONSTANT_MACROS
#include "FfmpegInputPlugin.hxx"
#include "lib/ffmpeg/Init.hxx"
#include "lib/ffmpeg/Domain.hxx"
#include "lib/ffmpeg/Error.hxx"
#include "../InputStream.hxx"
#include "../InputPlugin.hxx"
#include "PluginUnavailable.hxx"
#include "util/ASCII.hxx"
extern "C" {
#include <libavformat/avio.h>
}
struct FfmpegInputStream final : public InputStream {
AVIOContext *h;
bool eof;
FfmpegInputStream(const char *_uri, Mutex &_mutex,
AVIOContext *_h)
:InputStream(_uri, _mutex),
h(_h), eof(false) {
seekable = (h->seekable & AVIO_SEEKABLE_NORMAL) != 0;
size = avio_size(h);
/* hack to make MPD select the "ffmpeg" decoder plugin
- since avio.h doesn't tell us the MIME type of the
resource, we can't select a decoder plugin, but the
"ffmpeg" plugin is quite good at auto-detection */
SetMimeType("audio/x-mpd-ffmpeg");
SetReady();
}
~FfmpegInputStream() {
avio_close(h);
}
/* virtual methods from InputStream */
bool IsEOF() noexcept override;
size_t Read(void *ptr, size_t size) override;
void Seek(offset_type offset) override;
};
static inline bool
input_ffmpeg_supported(void)
{
void *opaque = nullptr;
return avio_enum_protocols(&opaque, 0) != nullptr;
}
static void
input_ffmpeg_init(EventLoop &, const ConfigBlock &)
{
FfmpegInit();
/* disable this plugin if there's no registered protocol */
if (!input_ffmpeg_supported())
throw PluginUnavailable("No protocol");
}
static InputStreamPtr
input_ffmpeg_open(const char *uri,
Mutex &mutex)
{
AVIOContext *h;
auto result = avio_open(&h, uri, AVIO_FLAG_READ);
if (result != 0)
throw MakeFfmpegError(result);
return std::make_unique<FfmpegInputStream>(uri, mutex, h);
}
size_t
FfmpegInputStream::Read(void *ptr, size_t read_size)
{
int result;
{
const ScopeUnlock unlock(mutex);
result = avio_read(h, (unsigned char *)ptr, read_size);
}
if (result <= 0) {
if (result < 0)
throw MakeFfmpegError(result, "avio_read() failed");
eof = true;
return 0;
}
offset += result;
return (size_t)result;
}
bool
FfmpegInputStream::IsEOF() noexcept
{
return eof;
}
void
FfmpegInputStream::Seek(offset_type new_offset)
{
int64_t result;
{
const ScopeUnlock unlock(mutex);
result = avio_seek(h, new_offset, SEEK_SET);
}
if (result < 0)
throw MakeFfmpegError(result, "avio_seek() failed");
offset = result;
eof = false;
}
static constexpr const char *ffmpeg_prefixes[] = {
"gopher://",
"hls+http://",
"hls+https://",
"rtp://",
"rtmp://",
"rtmpt://",
"rtmps://",
nullptr
};
const InputPlugin input_plugin_ffmpeg = {
"ffmpeg",
ffmpeg_prefixes,
input_ffmpeg_init,
nullptr,
input_ffmpeg_open,
};
|
