FFmpeg: libavutil/error.c Source File

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 <stdio.h>
22 #include <string.h>
23 #include "config.h"
24 #include "avstring.h"
25 #include "error.h"
26 #include "macros.h"
27 
28  struct error_entry {
29   int num;
30   const char *tag;
31   const char *str;
32 };
33 
34  #define ERROR_TAG(tag) AVERROR_##tag, #tag
35  #define EERROR_TAG(tag) AVERROR(tag), #tag
36  #define AVERROR_INPUT_AND_OUTPUT_CHANGED (AVERROR_INPUT_CHANGED | AVERROR_OUTPUT_CHANGED)
37  static const struct error_entry error_entries[] = {
38  { ERROR_TAG(BSF_NOT_FOUND), "Bitstream filter not found" },
39  { ERROR_TAG(BUG), "Internal bug, should not have happened" },
40  { ERROR_TAG(BUG2), "Internal bug, should not have happened" },
41  { ERROR_TAG(BUFFER_TOO_SMALL), "Buffer too small" },
42  { ERROR_TAG(DECODER_NOT_FOUND), "Decoder not found" },
43  { ERROR_TAG(DEMUXER_NOT_FOUND), "Demuxer not found" },
44  { ERROR_TAG(ENCODER_NOT_FOUND), "Encoder not found" },
45  { ERROR_TAG(EOF), "End of file" },
46  { ERROR_TAG(EXIT), "Immediate exit requested" },
47  { ERROR_TAG(EXTERNAL), "Generic error in an external library" },
48  { ERROR_TAG(FILTER_NOT_FOUND), "Filter not found" },
49  { ERROR_TAG(INPUT_CHANGED), "Input changed" },
50  { ERROR_TAG(INVALIDDATA), "Invalid data found when processing input" },
51  { ERROR_TAG(MUXER_NOT_FOUND), "Muxer not found" },
52  { ERROR_TAG(OPTION_NOT_FOUND), "Option not found" },
53  { ERROR_TAG(OUTPUT_CHANGED), "Output changed" },
54  { ERROR_TAG(PATCHWELCOME), "Not yet implemented in FFmpeg, patches welcome" },
55  { ERROR_TAG(PROTOCOL_NOT_FOUND), "Protocol not found" },
56  { ERROR_TAG(STREAM_NOT_FOUND), "Stream not found" },
57  { ERROR_TAG(UNKNOWN), "Unknown error occurred" },
58  { ERROR_TAG(EXPERIMENTAL), "Experimental feature" },
59  { ERROR_TAG(INPUT_AND_OUTPUT_CHANGED), "Input and output changed" },
60  { ERROR_TAG(HTTP_BAD_REQUEST), "Server returned 400 Bad Request" },
61  { ERROR_TAG(HTTP_UNAUTHORIZED), "Server returned 401 Unauthorized (authorization failed)" },
62  { ERROR_TAG(HTTP_FORBIDDEN), "Server returned 403 Forbidden (access denied)" },
63  { ERROR_TAG(HTTP_NOT_FOUND), "Server returned 404 Not Found" },
64  { ERROR_TAG(HTTP_TOO_MANY_REQUESTS), "Server returned 429 Too Many Requests" },
65  { ERROR_TAG(HTTP_OTHER_4XX), "Server returned 4XX Client Error, but not one of 40{0,1,3,4}" },
66  { ERROR_TAG(HTTP_SERVER_ERROR), "Server returned 5XX Server Error reply" },
67 #if !HAVE_STRERROR_R
68  { EERROR_TAG(E2BIG), "Argument list too long" },
69  { EERROR_TAG(EACCES), "Permission denied" },
70  { EERROR_TAG(EAGAIN), "Resource temporarily unavailable" },
71  { EERROR_TAG(EBADF), "Bad file descriptor" },
72  { EERROR_TAG(EBUSY), "Device or resource busy" },
73  { EERROR_TAG(ECHILD), "No child processes" },
74  { EERROR_TAG(EDEADLK), "Resource deadlock avoided" },
75  { EERROR_TAG(EDOM), "Numerical argument out of domain" },
76  { EERROR_TAG(EEXIST), "File exists" },
77  { EERROR_TAG(EFAULT), "Bad address" },
78  { EERROR_TAG(EFBIG), "File too large" },
79  { EERROR_TAG(EILSEQ), "Illegal byte sequence" },
80  { EERROR_TAG(EINTR), "Interrupted system call" },
81  { EERROR_TAG(EINVAL), "Invalid argument" },
82  { EERROR_TAG(EIO), "I/O error" },
83  { EERROR_TAG(EISDIR), "Is a directory" },
84  { EERROR_TAG(EMFILE), "Too many open files" },
85  { EERROR_TAG(EMLINK), "Too many links" },
86  { EERROR_TAG(ENAMETOOLONG), "File name too long" },
87  { EERROR_TAG(ENFILE), "Too many open files in system" },
88  { EERROR_TAG(ENODEV), "No such device" },
89  { EERROR_TAG(ENOENT), "No such file or directory" },
90  { EERROR_TAG(ENOEXEC), "Exec format error" },
91  { EERROR_TAG(ENOLCK), "No locks available" },
92  { EERROR_TAG(ENOMEM), "Cannot allocate memory" },
93  { EERROR_TAG(ENOSPC), "No space left on device" },
94  { EERROR_TAG(ENOSYS), "Function not implemented" },
95  { EERROR_TAG(ENOTDIR), "Not a directory" },
96  { EERROR_TAG(ENOTEMPTY), "Directory not empty" },
97  { EERROR_TAG(ENOTTY), "Inappropriate I/O control operation" },
98  { EERROR_TAG(ENXIO), "No such device or address" },
99  { EERROR_TAG(EPERM), "Operation not permitted" },
100  { EERROR_TAG(EPIPE), "Broken pipe" },
101  { EERROR_TAG(ERANGE), "Result too large" },
102  { EERROR_TAG(EROFS), "Read-only file system" },
103  { EERROR_TAG(ESPIPE), "Illegal seek" },
104  { EERROR_TAG(ESRCH), "No such process" },
105  { EERROR_TAG(EXDEV), "Cross-device link" },
106 #endif
107 };
108 
109  int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
110 {
111  int ret = 0, i;
112  const struct error_entry *entry = NULL;
113 
114  for (i = 0; i < FF_ARRAY_ELEMS(error_entries); i++) {
115  if (errnum == error_entries[i].num) {
116  entry = &error_entries[i];
117  break;
118  }
119  }
120  if (entry) {
121  av_strlcpy(errbuf, entry->str, errbuf_size);
122  } else {
123 #if HAVE_STRERROR_R
124  ret = AVERROR(strerror_r(AVUNERROR(errnum), errbuf, errbuf_size));
125 #else
126  ret = -1;
127 #endif
128  if (ret < 0)
129  snprintf(errbuf, errbuf_size, "Error number %d occurred", errnum);
130  }
131 
132  return ret;
133 }
entry
#define entry
Definition: aom_film_grain_template.c:66
AVERROR
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
error_entries
static const struct error_entry error_entries[]
Definition: error.c:37
ERROR_TAG
#define ERROR_TAG(tag)
Definition: error.c:34
UNKNOWN
@ UNKNOWN
Definition: ftp.c:39
AVUNERROR
#define AVUNERROR(e)
Definition: error.h:46
macros.h
av_strerror
int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
Put a description of the AVERROR code errnum in errbuf.
Definition: error.c:109
error_entry
Definition: error.c:28
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
error_entry::tag
const char * tag
Definition: error.c:30
NULL
#define NULL
Definition: coverity.c:32
error.h
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
ret
ret
Definition: filter_design.txt:187
EERROR_TAG
#define EERROR_TAG(tag)
Definition: error.c:35
error_entry::str
const char * str
Definition: error.c:31
av_strlcpy
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:85
avstring.h
snprintf
#define snprintf
Definition: snprintf.h:34
error_entry::num
int num
Definition: error.c:29
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