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
|
/*
* Copyright (C) 2003-2014 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 "config.h"
#include "FfmpegInputPlugin.hxx"
#include "../InputStream.hxx"
#include "../InputPlugin.hxx"
#include "util/StringUtil.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
extern "C" {
#include <libavformat/avio.h>
#include <libavformat/avformat.h>
}
struct FfmpegInputStream final : public InputStream {
AVIOContext *h;
bool eof;
FfmpegInputStream(const char *_uri, Mutex &_mutex, Cond &_cond,
AVIOContext *_h)
:InputStream(input_plugin_ffmpeg, _uri, _mutex, _cond),
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() override;
size_t Read(void *ptr, size_t size, Error &error) override;
bool Seek(offset_type offset, int whence, Error &error) override;
};
static constexpr Domain ffmpeg_domain("ffmpeg");
static inline bool
input_ffmpeg_supported(void)
{
void *opaque = nullptr;
return avio_enum_protocols(&opaque, 0) != nullptr;
}
static InputPlugin::InitResult
input_ffmpeg_init(gcc_unused const config_param ¶m,
Error &error)
{
av_register_all();
/* disable this plugin if there's no registered protocol */
if (!input_ffmpeg_supported()) {
error.Set(ffmpeg_domain, "No protocol");
return InputPlugin::InitResult::UNAVAILABLE;
}
return InputPlugin::InitResult::SUCCESS;
}
static InputStream *
input_ffmpeg_open(const char *uri,
Mutex &mutex, Cond &cond,
Error &error)
{
if (!StringStartsWith(uri, "gopher://") &&
!StringStartsWith(uri, "rtp://") &&
!StringStartsWith(uri, "rtsp://") &&
!StringStartsWith(uri, "rtmp://") &&
!StringStartsWith(uri, "rtmpt://") &&
!StringStartsWith(uri, "rtmps://"))
return nullptr;
AVIOContext *h;
int ret = avio_open(&h, uri, AVIO_FLAG_READ);
if (ret != 0) {
error.Set(ffmpeg_domain, ret,
"libavformat failed to open the URI");
return nullptr;
}
return new FfmpegInputStream(uri, mutex, cond, h);
}
size_t
FfmpegInputStream::Read(void *ptr, size_t read_size, Error &error)
{
int ret = avio_read(h, (unsigned char *)ptr, read_size);
if (ret <= 0) {
if (ret < 0)
error.Set(ffmpeg_domain, "avio_read() failed");
eof = true;
return false;
}
offset += ret;
return (size_t)ret;
}
bool
FfmpegInputStream::IsEOF()
{
return eof;
}
bool
FfmpegInputStream::Seek(offset_type new_offset, int whence, Error &error)
{
int64_t ret = avio_seek(h, new_offset, whence);
if (ret >= 0) {
eof = false;
return true;
} else {
error.Set(ffmpeg_domain, "avio_seek() failed");
return false;
}
}
const InputPlugin input_plugin_ffmpeg = {
"ffmpeg",
input_ffmpeg_init,
nullptr,
input_ffmpeg_open,
};
|
