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
|
// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/ffmpeg/file_protocol.h"
#include "build/build_config.h"
#if defined(OS_WIN)
#include <io.h>
#else
#include <unistd.h>
#endif
#include <fcntl.h>
#include "base/compiler_specific.h"
#include "base/eintr_wrapper.h"
#include "base/file_util.h"
#include "media/ffmpeg/ffmpeg_common.h"
// warning C4996: 'open': The POSIX name for this item is deprecated.
MSVC_PUSH_DISABLE_WARNING(4996)
namespace {
int GetHandle(URLContext *h) {
return static_cast<int>(reinterpret_cast<intptr_t>(h->priv_data));
}
// FFmpeg protocol interface.
int OpenContext(URLContext* h, const char* filename, int flags) {
int access = O_RDONLY;
if (flags & URL_RDWR) {
access = O_CREAT | O_TRUNC | O_RDWR;
} else if (flags & URL_WRONLY) {
access = O_CREAT | O_TRUNC | O_WRONLY;
}
#ifdef O_BINARY
access |= O_BINARY;
#endif
int f = open(filename, access, 0666);
if (f == -1)
return AVERROR(ENOENT);
h->priv_data = reinterpret_cast<void*>(static_cast<intptr_t>(f));
h->is_streamed = false;
return 0;
}
int ReadContext(URLContext* h, unsigned char* buf, int size) {
return HANDLE_EINTR(read(GetHandle(h), buf, size));
}
#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(52, 68, 0)
int WriteContext(URLContext* h, const unsigned char* buf, int size) {
#else
int WriteContext(URLContext* h, unsigned char* buf, int size) {
#endif
return HANDLE_EINTR(write(GetHandle(h), buf, size));
}
int64 SeekContext(URLContext* h, int64 offset, int whence) {
#if defined(OS_WIN)
return _lseeki64(GetHandle(h), static_cast<__int64>(offset), whence);
#else
COMPILE_ASSERT(sizeof(off_t) == 8, off_t_not_64_bit);
return lseek(GetHandle(h), static_cast<off_t>(offset), whence);
#endif
}
int CloseContext(URLContext* h) {
return HANDLE_EINTR(close(GetHandle(h)));
}
} // namespace
MSVC_POP_WARNING()
URLProtocol kFFmpegFileProtocol = {
"file",
&OpenContext,
&ReadContext,
&WriteContext,
&SeekContext,
&CloseContext,
NULL, // *next
NULL, // url_read_pause
NULL, // url_read_seek
&GetHandle
};
|
