FFmpeg
error.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #undef _GNU_SOURCE
20 #define _XOPEN_SOURCE 600 /* XSI-compliant version of strerror_r */
21 #include "avutil.h"
22 #include "avstring.h"
23 #include "common.h"
24 
25 struct error_entry {
26  int num;
27  const char *tag;
28  const char *str;
29 };
30 
31 #define ERROR_TAG(tag) AVERROR_##tag, #tag
32 #define EERROR_TAG(tag) AVERROR(tag), #tag
33 #define AVERROR_INPUT_AND_OUTPUT_CHANGED (AVERROR_INPUT_CHANGED | AVERROR_OUTPUT_CHANGED)
34 static const struct error_entry error_entries[] = {
35  { ERROR_TAG(BSF_NOT_FOUND), "Bitstream filter not found" },
36  { ERROR_TAG(BUG), "Internal bug, should not have happened" },
37  { ERROR_TAG(BUG2), "Internal bug, should not have happened" },
38  { ERROR_TAG(BUFFER_TOO_SMALL), "Buffer too small" },
39  { ERROR_TAG(DECODER_NOT_FOUND), "Decoder not found" },
40  { ERROR_TAG(DEMUXER_NOT_FOUND), "Demuxer not found" },
41  { ERROR_TAG(ENCODER_NOT_FOUND), "Encoder not found" },
42  { ERROR_TAG(EOF), "End of file" },
43  { ERROR_TAG(EXIT), "Immediate exit requested" },
44  { ERROR_TAG(EXTERNAL), "Generic error in an external library" },
45  { ERROR_TAG(FILTER_NOT_FOUND), "Filter not found" },
46  { ERROR_TAG(INPUT_CHANGED), "Input changed" },
47  { ERROR_TAG(INVALIDDATA), "Invalid data found when processing input" },
48  { ERROR_TAG(MUXER_NOT_FOUND), "Muxer not found" },
49  { ERROR_TAG(OPTION_NOT_FOUND), "Option not found" },
50  { ERROR_TAG(OUTPUT_CHANGED), "Output changed" },
51  { ERROR_TAG(PATCHWELCOME), "Not yet implemented in FFmpeg, patches welcome" },
52  { ERROR_TAG(PROTOCOL_NOT_FOUND), "Protocol not found" },
53  { ERROR_TAG(STREAM_NOT_FOUND), "Stream not found" },
54  { ERROR_TAG(UNKNOWN), "Unknown error occurred" },
55  { ERROR_TAG(EXPERIMENTAL), "Experimental feature" },
56  { ERROR_TAG(INPUT_AND_OUTPUT_CHANGED), "Input and output changed" },
57  { ERROR_TAG(HTTP_BAD_REQUEST), "Server returned 400 Bad Request" },
58  { ERROR_TAG(HTTP_UNAUTHORIZED), "Server returned 401 Unauthorized (authorization failed)" },
59  { ERROR_TAG(HTTP_FORBIDDEN), "Server returned 403 Forbidden (access denied)" },
60  { ERROR_TAG(HTTP_NOT_FOUND), "Server returned 404 Not Found" },
61  { ERROR_TAG(HTTP_OTHER_4XX), "Server returned 4XX Client Error, but not one of 40{0,1,3,4}" },
62  { ERROR_TAG(HTTP_SERVER_ERROR), "Server returned 5XX Server Error reply" },
63 #if !HAVE_STRERROR_R
64  { EERROR_TAG(E2BIG), "Argument list too long" },
65  { EERROR_TAG(EACCES), "Permission denied" },
66  { EERROR_TAG(EAGAIN), "Resource temporarily unavailable" },
67  { EERROR_TAG(EBADF), "Bad file descriptor" },
68  { EERROR_TAG(EBUSY), "Device or resource busy" },
69  { EERROR_TAG(ECHILD), "No child processes" },
70  { EERROR_TAG(EDEADLK), "Resource deadlock avoided" },
71  { EERROR_TAG(EDOM), "Numerical argument out of domain" },
72  { EERROR_TAG(EEXIST), "File exists" },
73  { EERROR_TAG(EFAULT), "Bad address" },
74  { EERROR_TAG(EFBIG), "File too large" },
75  { EERROR_TAG(EILSEQ), "Illegal byte sequence" },
76  { EERROR_TAG(EINTR), "Interrupted system call" },
77  { EERROR_TAG(EINVAL), "Invalid argument" },
78  { EERROR_TAG(EIO), "I/O error" },
79  { EERROR_TAG(EISDIR), "Is a directory" },
80  { EERROR_TAG(EMFILE), "Too many open files" },
81  { EERROR_TAG(EMLINK), "Too many links" },
82  { EERROR_TAG(ENAMETOOLONG), "File name too long" },
83  { EERROR_TAG(ENFILE), "Too many open files in system" },
84  { EERROR_TAG(ENODEV), "No such device" },
85  { EERROR_TAG(ENOENT), "No such file or directory" },
86  { EERROR_TAG(ENOEXEC), "Exec format error" },
87  { EERROR_TAG(ENOLCK), "No locks available" },
88  { EERROR_TAG(ENOMEM), "Cannot allocate memory" },
89  { EERROR_TAG(ENOSPC), "No space left on device" },
90  { EERROR_TAG(ENOSYS), "Function not implemented" },
91  { EERROR_TAG(ENOTDIR), "Not a directory" },
92  { EERROR_TAG(ENOTEMPTY), "Directory not empty" },
93  { EERROR_TAG(ENOTTY), "Inappropriate I/O control operation" },
94  { EERROR_TAG(ENXIO), "No such device or address" },
95  { EERROR_TAG(EPERM), "Operation not permitted" },
96  { EERROR_TAG(EPIPE), "Broken pipe" },
97  { EERROR_TAG(ERANGE), "Result too large" },
98  { EERROR_TAG(EROFS), "Read-only file system" },
99  { EERROR_TAG(ESPIPE), "Illegal seek" },
100  { EERROR_TAG(ESRCH), "No such process" },
101  { EERROR_TAG(EXDEV), "Cross-device link" },
102 #endif
103 };
104 
105 int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
106 {
107  int ret = 0, i;
108  const struct error_entry *entry = NULL;
109 
110  for (i = 0; i < FF_ARRAY_ELEMS(error_entries); i++) {
111  if (errnum == error_entries[i].num) {
112  entry = &error_entries[i];
113  break;
114  }
115  }
116  if (entry) {
117  av_strlcpy(errbuf, entry->str, errbuf_size);
118  } else {
119 #if HAVE_STRERROR_R
120  ret = AVERROR(strerror_r(AVUNERROR(errnum), errbuf, errbuf_size));
121 #else
122  ret = -1;
123 #endif
124  if (ret < 0)
125  snprintf(errbuf, errbuf_size, "Error number %d occurred", errnum);
126  }
127 
128  return ret;
129 }
#define NULL
Definition: coverity.c:32
Convenience header that includes libavutil&#39;s core.
Definition: ftp.c:34
#define EERROR_TAG(tag)
Definition: error.c:32
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
Definition: error.c:25
#define FF_ARRAY_ELEMS(a)
const char * tag
Definition: error.c:27
static const struct error_entry error_entries[]
Definition: error.c:34
const char * str
Definition: error.c:28
#define snprintf
Definition: snprintf.h:34
#define ERROR_TAG(tag)
Definition: error.c:31
int num
Definition: error.c:26
int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
Put a description of the AVERROR code errnum in errbuf.
Definition: error.c:105
common internal and external API header
#define AVUNERROR(e)
Definition: error.h:44
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions