FFmpeg/libavutil/error.h

/*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file libavutil/error.h
 * error code definitions
 */

#ifndef AVUTIL_ERROR_H
#define AVUTIL_ERROR_H

#include <errno.h>
#include "avutil.h"

/* error handling */
#if EDOM > 0
#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
#else
/* Some platforms have E* and errno already negated. */
#define AVERROR(e) (e)
#define AVUNERROR(e) (e)
#endif

#if LIBAVUTIL_VERSION_MAJOR < 51
#define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< Invalid data found when processing input */
#define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
#define AVERROR_NOENT       AVERROR(ENOENT)  /**< No such file or directory */
#define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< Unknown format */
#define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< Not enough memory */
#define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename */
#define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< Unknown error */
#endif

#define AVERROR_EOF         AVERROR(EPIPE)   /**< End of file */
#define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported */

#define AVERROR_PATCHWELCOME    (-MKTAG('P','A','W','E')) /**< Not yet implemented in FFmpeg, patches welcome */

#if LIBAVUTIL_VERSION_MAJOR > 50
#define AVERROR_INVALIDDATA     (-MKTAG('I','N','D','A')) /**< Invalid data found when processing input */
#define AVERROR_NUMEXPECTED     (-MKTAG('N','U','E','X')) /**< Number syntax expected in filename */
#endif

#endif /* AVUTIL_ERROR_H */