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116 lines
4.5 KiB
116 lines
4.5 KiB
/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* error code definitions |
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*/ |
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#ifndef AVUTIL_ERROR_H |
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#define AVUTIL_ERROR_H |
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#include <errno.h> |
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#include <stddef.h> |
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/** |
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* @addtogroup lavu_error |
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* |
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* @{ |
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*/ |
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/* error handling */ |
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#if EDOM > 0 |
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#define AVERROR(e) (-(e)) ///< Returns a negative error code from a POSIX error code, to return from library functions. |
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#define AVUNERROR(e) (-(e)) ///< Returns a POSIX error code from a library function error return value. |
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#else |
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/* Some platforms have E* and errno already negated. */ |
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#define AVERROR(e) (e) |
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#define AVUNERROR(e) (e) |
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#endif |
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#define FFERRTAG(a, b, c, d) (-(int)MKTAG(a, b, c, d)) |
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#define AVERROR_BSF_NOT_FOUND FFERRTAG(0xF8,'B','S','F') ///< Bitstream filter not found |
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#define AVERROR_BUG FFERRTAG( 'B','U','G','!') ///< Internal bug, also see AVERROR_BUG2 |
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#define AVERROR_BUFFER_TOO_SMALL FFERRTAG( 'B','U','F','S') ///< Buffer too small |
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#define AVERROR_DECODER_NOT_FOUND FFERRTAG(0xF8,'D','E','C') ///< Decoder not found |
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#define AVERROR_DEMUXER_NOT_FOUND FFERRTAG(0xF8,'D','E','M') ///< Demuxer not found |
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#define AVERROR_ENCODER_NOT_FOUND FFERRTAG(0xF8,'E','N','C') ///< Encoder not found |
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#define AVERROR_EOF FFERRTAG( 'E','O','F',' ') ///< End of file |
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#define AVERROR_EXIT FFERRTAG( 'E','X','I','T') ///< Immediate exit was requested; the called function should not be restarted |
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#define AVERROR_EXTERNAL FFERRTAG( 'E','X','T',' ') ///< Generic error in an external library |
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#define AVERROR_FILTER_NOT_FOUND FFERRTAG(0xF8,'F','I','L') ///< Filter not found |
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#define AVERROR_INVALIDDATA FFERRTAG( 'I','N','D','A') ///< Invalid data found when processing input |
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#define AVERROR_MUXER_NOT_FOUND FFERRTAG(0xF8,'M','U','X') ///< Muxer not found |
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#define AVERROR_OPTION_NOT_FOUND FFERRTAG(0xF8,'O','P','T') ///< Option not found |
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#define AVERROR_PATCHWELCOME FFERRTAG( 'P','A','W','E') ///< Not yet implemented in FFmpeg, patches welcome |
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#define AVERROR_PROTOCOL_NOT_FOUND FFERRTAG(0xF8,'P','R','O') ///< Protocol not found |
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#define AVERROR_STREAM_NOT_FOUND FFERRTAG(0xF8,'S','T','R') ///< Stream not found |
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/** |
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* This is semantically identical to AVERROR_BUG |
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* it has been introduced in Libav after our AVERROR_BUG and with a modified value. |
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*/ |
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#define AVERROR_BUG2 FFERRTAG( 'B','U','G',' ') |
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#define AVERROR_UNKNOWN FFERRTAG( 'U','N','K','N') ///< Unknown error, typically from an external library |
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#define AV_ERROR_MAX_STRING_SIZE 64 |
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/** |
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* Put a description of the AVERROR code errnum in errbuf. |
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* In case of failure the global variable errno is set to indicate the |
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* error. Even in case of failure av_strerror() will print a generic |
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* error message indicating the errnum provided to errbuf. |
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* |
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* @param errnum error code to describe |
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* @param errbuf buffer to which description is written |
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* @param errbuf_size the size in bytes of errbuf |
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* @return 0 on success, a negative value if a description for errnum |
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* cannot be found |
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*/ |
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int av_strerror(int errnum, char *errbuf, size_t errbuf_size); |
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/** |
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* Fill the provided buffer with a string containing an error string |
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* corresponding to the AVERROR code errnum. |
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* |
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* @param errbuf a buffer |
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* @param errbuf_size size in bytes of errbuf |
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* @param errnum error code to describe |
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* @return the buffer in input, filled with the error description |
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* @see av_strerror() |
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*/ |
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static inline char *av_make_error_string(char *errbuf, size_t errbuf_size, int errnum) |
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{ |
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av_strerror(errnum, errbuf, errbuf_size); |
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return errbuf; |
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} |
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/** |
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* Convenience macro, the return value should be used only directly in |
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* function arguments but never stand-alone. |
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*/ |
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#define av_err2str(errnum) \ |
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av_make_error_string((char[AV_ERROR_MAX_STRING_SIZE]){0}, AV_ERROR_MAX_STRING_SIZE, errnum) |
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/** |
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* @} |
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*/ |
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#endif /* AVUTIL_ERROR_H */
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