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lavu/error: use a table to store error codes and strings, add test 

The table is mostly useful to enumerate the available AVERROR* in the
test output.
This commit is contained in:
Stefano Sabatini 2012-02-06 14:16:33 +01:00
parent 3ecaba677e
commit 4299fd23d3
2 changed files with 61 additions and 24 deletions
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1
libavutil/Makefile
View File

@ -95,6 +95,7 @@ TESTPROGS = adler32 \
cpu \
crc \
des \
error \
eval \
file \
fifo \

84
libavutil/error.c
View File

@ -20,34 +20,45 @@
#include "avutil.h"
#include "avstring.h"
struct error_entry {
int num;
const char *tag;
const char *str;
};
#define ERROR_TAG(tag) AVERROR_##tag, #tag
struct error_entry error_entries[] = {
{ ERROR_TAG(BSF_NOT_FOUND), "Bitstream filter not found" },
{ ERROR_TAG(BUG), "Internal bug, should not have happened" },
{ ERROR_TAG(BUG2), "Internal bug, should not have happened" },
{ ERROR_TAG(DECODER_NOT_FOUND), "Decoder not found" },
{ ERROR_TAG(DEMUXER_NOT_FOUND), "Demuxer not found" },
{ ERROR_TAG(ENCODER_NOT_FOUND), "Encoder not found" },
{ ERROR_TAG(EOF), "End of file" },
{ ERROR_TAG(EXIT), "Immediate exit requested" },
{ ERROR_TAG(FILTER_NOT_FOUND), "Filter not found" },
{ ERROR_TAG(INVALIDDATA), "Invalid data found when processing input" },
{ ERROR_TAG(MUXER_NOT_FOUND), "Muxer not found" },
{ ERROR_TAG(OPTION_NOT_FOUND), "Option not found" },
{ ERROR_TAG(PATCHWELCOME), "Not yet implemented in FFmpeg, patches welcome" },
{ ERROR_TAG(PROTOCOL_NOT_FOUND), "Protocol not found" },
{ ERROR_TAG(STREAM_NOT_FOUND), "Stream not found" },
{ ERROR_TAG(UNKNOWN), "Unknown error occurred" },
};
int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
{
int ret = 0;
const char *errstr = NULL;
int ret = 0, i;
struct error_entry *entry = NULL;
switch (errnum) {
case AVERROR_BSF_NOT_FOUND: errstr = "Bitstream filter not found" ; break;
case AVERROR_BUG2:
case AVERROR_BUG: errstr = "Internal bug, should not have happened" ; break;
case AVERROR_DECODER_NOT_FOUND: errstr = "Decoder not found" ; break;
case AVERROR_DEMUXER_NOT_FOUND: errstr = "Demuxer not found" ; break;
case AVERROR_ENCODER_NOT_FOUND: errstr = "Encoder not found" ; break;
case AVERROR_EOF: errstr = "End of file" ; break;
case AVERROR_EXIT: errstr = "Immediate exit requested" ; break;
case AVERROR_FILTER_NOT_FOUND: errstr = "Filter not found" ; break;
case AVERROR_INVALIDDATA: errstr = "Invalid data found when processing input" ; break;
case AVERROR_MUXER_NOT_FOUND: errstr = "Muxer not found" ; break;
case AVERROR_OPTION_NOT_FOUND: errstr = "Option not found" ; break;
case AVERROR_PATCHWELCOME: errstr = "Not yet implemented in FFmpeg, patches welcome"; break;
case AVERROR_PROTOCOL_NOT_FOUND:errstr = "Protocol not found" ; break;
case AVERROR_STREAM_NOT_FOUND: errstr = "Stream not found" ; break;
case AVERROR_UNKNOWN: errstr = "Unknown error occurred" ; break;
case AVERROR(EINVAL): errstr = "Invalid argument" ; break;
case 0: errstr = "Success" ; break;
for (i = 0; i < FF_ARRAY_ELEMS(error_entries); i++) {
if (errnum == error_entries[i].num) {
entry = &error_entries[i];
break;
}
}
if (errstr) {
av_strlcpy(errbuf, errstr, errbuf_size);
if (entry) {
av_strlcpy(errbuf, entry->str, errbuf_size);
} else {
#if HAVE_STRERROR_R
ret = strerror_r(AVUNERROR(errnum), errbuf, errbuf_size);
@ -60,3 +71,28 @@ int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
return ret;
}
#ifdef TEST
#undef printf
int main(void)
{
int i;
char errbuf[256];
for (i = 0; i < FF_ARRAY_ELEMS(error_entries); i++) {
struct error_entry *entry = &error_entries[i];
av_strerror(entry->num, errbuf, sizeof(errbuf));
printf("%d: %s [%s]\n", entry->num, errbuf, entry->tag);
}
for (i = 0; i < 256; i++) {
av_strerror(-i, errbuf, sizeof(errbuf));
printf("%d: %s\n", -i, errbuf);
}
return 0;
}
#endif /* TEST */