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ffmpeg / libavutil / log.h @ 91605c69

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/*
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 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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 *
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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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#ifndef FFMPEG_LOG_H
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#define FFMPEG_LOG_H
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#include <stdarg.h>
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/**
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 * Describes the class of an AVClass context structure, that is an
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 * arbitrary struct of which the first field is a pointer to an
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 * AVClass struct (e.g. AVCodecContext, AVFormatContext etc.).
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 */
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typedef struct AVCLASS AVClass;
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struct AVCLASS {
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    /**
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     * The name of the class; usually it is the same name as the
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     * context structure type to which the AVClass is associated.
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     */
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    const char* class_name;
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    /**
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     * a pointer to a function which returns the name of a context
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     * instance \p ctx associated with the class
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     */
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    const char* (*item_name)(void* ctx);
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    /**
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     * a pointer to the first option specified in the class if any or NULL
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     *
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     * @see av_set_default_options()
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     */
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    const struct AVOption *option;
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};
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/* av_log API */
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#if LIBAVUTIL_VERSION_INT < (50<<16)
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#define AV_LOG_QUIET -1
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#define AV_LOG_FATAL 0
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#define AV_LOG_ERROR 0
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#define AV_LOG_WARNING 1
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#define AV_LOG_INFO 1
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#define AV_LOG_VERBOSE 1
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#define AV_LOG_DEBUG 2
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#else
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#define AV_LOG_QUIET    -8
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/**
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 * something went really wrong and we will crash now
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 */
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#define AV_LOG_PANIC     0
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/**
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 * something went wrong and recovery is not possible
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 * like no header in a format which depends on it or a combination
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 * of parameters which are not allowed
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 */
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#define AV_LOG_FATAL     8
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/**
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 * something went wrong and cannot losslessly be recovered
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 * but not all future data is affected
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 */
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#define AV_LOG_ERROR    16
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/**
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 * something somehow does not look correct / something which may or may not
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 * lead to some problems like use of -vstrict -2
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 */
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#define AV_LOG_WARNING  24
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#define AV_LOG_INFO     32
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#define AV_LOG_VERBOSE  40
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/**
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 * stuff which is only useful for libav* developers
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 */
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#define AV_LOG_DEBUG    48
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#endif
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#if LIBAVUTIL_VERSION_INT < (50<<16)
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extern int av_log_level;
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#endif
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/**
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 * Send the specified message to the log if the level is less than or equal to
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 * the current av_log_level. By default, all logging messages are sent to
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 * stderr. This behavior can be altered by setting a different av_vlog callback
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 * function.
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 *
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 * @param avcl A pointer to an arbitrary struct of which the first field is a
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 * pointer to an AVClass struct.
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 * @param level The importance level of the message, lower values signifying
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 * higher importance.
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 * @param fmt The format string (printf-compatible) that specifies how
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 * subsequent arguments are converted to output.
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 * @see av_vlog
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 */
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#ifdef __GNUC__
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void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
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#else
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void av_log(void*, int level, const char *fmt, ...);
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#endif
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void av_vlog(void*, int level, const char *fmt, va_list);
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int av_log_get_level(void);
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void av_log_set_level(int);
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void av_log_set_callback(void (*)(void*, int, const char*, va_list));
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void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl);
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#endif /* FFMPEG_LOG_H */