error.c
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1 /*
2  * This file is part of Libav.
3  *
4  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "avutil.h"
20 #include "avstring.h"
21 
22 int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
23 {
24  int ret = 0;
25  const char *errstr = NULL;
26 
27  switch (errnum) {
28  case AVERROR_BSF_NOT_FOUND: errstr = "Bitstream filter not found" ; break;
29  case AVERROR_DECODER_NOT_FOUND: errstr = "Decoder not found" ; break;
30  case AVERROR_DEMUXER_NOT_FOUND: errstr = "Demuxer not found" ; break;
31  case AVERROR_ENCODER_NOT_FOUND: errstr = "Encoder not found" ; break;
32  case AVERROR_EOF: errstr = "End of file" ; break;
33  case AVERROR_EXIT: errstr = "Immediate exit requested" ; break;
34  case AVERROR_FILTER_NOT_FOUND: errstr = "Filter not found" ; break;
35  case AVERROR_INVALIDDATA: errstr = "Invalid data found when processing input" ; break;
36  case AVERROR_MUXER_NOT_FOUND: errstr = "Muxer not found" ; break;
37  case AVERROR_OPTION_NOT_FOUND: errstr = "Option not found" ; break;
38  case AVERROR_PATCHWELCOME: errstr = "Not yet implemented in Libav, patches welcome"; break;
39  case AVERROR_PROTOCOL_NOT_FOUND:errstr = "Protocol not found" ; break;
40  case AVERROR_STREAM_NOT_FOUND: errstr = "Stream not found" ; break;
41  case AVERROR_BUG: errstr = "Bug detected, please report the issue" ; break;
42  case AVERROR_UNKNOWN: errstr = "Unknown error occurred" ; break;
43  }
44 
45  if (errstr) {
46  av_strlcpy(errbuf, errstr, errbuf_size);
47  } else {
48 #if HAVE_STRERROR_R
49  ret = strerror_r(AVUNERROR(errnum), errbuf, errbuf_size);
50 #else
51  ret = -1;
52 #endif
53  if (ret < 0)
54  snprintf(errbuf, errbuf_size, "Error number %d occurred", errnum);
55  }
56 
57  return ret;
58 }