/* * copyright (c) 2006 Michael Niedermayer <[email protected]> * * 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 */ #ifndef AVUTIL_LOG_H #define AVUTIL_LOG_H #include <stdarg.h> #include "attributes.h" #include "version.h" AVClassCategory; #define AV_IS_INPUT_DEVICE(category) … #define AV_IS_OUTPUT_DEVICE(category) … struct AVOptionRanges; /** * Describe the class of an AVClass context structure. That is an * arbitrary struct of which the first field is a pointer to an * AVClass struct (e.g. AVCodecContext, AVFormatContext etc.). */ AVClass; /** * @addtogroup lavu_log * * @{ * * @defgroup lavu_log_constants Logging Constants * * @{ */ /** * Print no output. */ #define AV_LOG_QUIET … /** * Something went really wrong and we will crash now. */ #define AV_LOG_PANIC … /** * Something went wrong and recovery is not possible. * For example, no header was found for a format which depends * on headers or an illegal combination of parameters is used. */ #define AV_LOG_FATAL … /** * Something went wrong and cannot losslessly be recovered. * However, not all future data is affected. */ #define AV_LOG_ERROR … /** * Something somehow does not look correct. This may or may not * lead to problems. An example would be the use of '-vstrict -2'. */ #define AV_LOG_WARNING … /** * Standard information. */ #define AV_LOG_INFO … /** * Detailed information. */ #define AV_LOG_VERBOSE … /** * Stuff which is only useful for libav* developers. */ #define AV_LOG_DEBUG … /** * Extremely verbose debugging, useful for libav* development. */ #define AV_LOG_TRACE … #define AV_LOG_MAX_OFFSET … /** * @} */ /** * Sets additional colors for extended debugging sessions. * @code av_log(ctx, AV_LOG_DEBUG|AV_LOG_C(134), "Message in purple\n"); @endcode * Requires 256color terminal support. Uses outside debugging is not * recommended. */ #define AV_LOG_C(x) … /** * Send the specified message to the log if the level is less than or equal * to the current av_log_level. By default, all logging messages are sent to * stderr. This behavior can be altered by setting a different logging callback * function. * @see av_log_set_callback * * @param avcl A pointer to an arbitrary struct of which the first field is a * pointer to an AVClass struct or NULL if general log. * @param level The importance level of the message expressed using a @ref * lavu_log_constants "Logging Constant". * @param fmt The format string (printf-compatible) that specifies how * subsequent arguments are converted to output. */ #if defined(CHROMIUM_NO_LOGGING) #define av_log … #else void av_log(void *avcl, int level, const char *fmt, ...) av_printf_format(3, 4); #endif /** * Send the specified message to the log once with the initial_level and then with * the subsequent_level. By default, all logging messages are sent to * stderr. This behavior can be altered by setting a different logging callback * function. * @see av_log * * @param avcl A pointer to an arbitrary struct of which the first field is a * pointer to an AVClass struct or NULL if general log. * @param initial_level importance level of the message expressed using a @ref * lavu_log_constants "Logging Constant" for the first occurance. * @param subsequent_level importance level of the message expressed using a @ref * lavu_log_constants "Logging Constant" after the first occurance. * @param fmt The format string (printf-compatible) that specifies how * subsequent arguments are converted to output. * @param state a variable to keep trak of if a message has already been printed * this must be initialized to 0 before the first use. The same state * must not be accessed by 2 Threads simultaneously. */ #if defined(CHROMIUM_NO_LOGGING) #define av_log_once … #else void av_log_once(void* avcl, int initial_level, int subsequent_level, int *state, const char *fmt, ...) av_printf_format(5, 6); #endif /** * Send the specified message to the log if the level is less than or equal * to the current av_log_level. By default, all logging messages are sent to * stderr. This behavior can be altered by setting a different logging callback * function. * @see av_log_set_callback * * @param avcl A pointer to an arbitrary struct of which the first field is a * pointer to an AVClass struct. * @param level The importance level of the message expressed using a @ref * lavu_log_constants "Logging Constant". * @param fmt The format string (printf-compatible) that specifies how * subsequent arguments are converted to output. * @param vl The arguments referenced by the format string. */ #if defined(CHROMIUM_NO_LOGGING) #define av_vlog … #else void av_vlog(void *avcl, int level, const char *fmt, va_list vl); #endif /** * Get the current log level * * @see lavu_log_constants * * @return Current log level */ int av_log_get_level(void); /** * Set the log level * * @see lavu_log_constants * * @param level Logging level */ void av_log_set_level(int level); /** * Set the logging callback * * @note The callback must be thread safe, even if the application does not use * threads itself as some codecs are multithreaded. * * @see av_log_default_callback * * @param callback A logging function with a compatible signature. */ void av_log_set_callback(void (*callback)(void*, int, const char*, va_list)); /** * Default logging callback * * It prints the message to stderr, optionally colorizing it. * * @param avcl A pointer to an arbitrary struct of which the first field is a * pointer to an AVClass struct. * @param level The importance level of the message expressed using a @ref * lavu_log_constants "Logging Constant". * @param fmt The format string (printf-compatible) that specifies how * subsequent arguments are converted to output. * @param vl The arguments referenced by the format string. */ void av_log_default_callback(void *avcl, int level, const char *fmt, va_list vl); /** * Return the context name * * @param ctx The AVClass context * * @return The AVClass class_name */ const char* av_default_item_name(void* ctx); AVClassCategory av_default_get_category(void *ptr); /** * Format a line of log the same way as the default callback. * @param line buffer to receive the formatted line * @param line_size size of the buffer * @param print_prefix used to store whether the prefix must be printed; * must point to a persistent integer initially set to 1 */ void av_log_format_line(void *ptr, int level, const char *fmt, va_list vl, char *line, int line_size, int *print_prefix); /** * Format a line of log the same way as the default callback. * @param line buffer to receive the formatted line; * may be NULL if line_size is 0 * @param line_size size of the buffer; at most line_size-1 characters will * be written to the buffer, plus one null terminator * @param print_prefix used to store whether the prefix must be printed; * must point to a persistent integer initially set to 1 * @return Returns a negative value if an error occurred, otherwise returns * the number of characters that would have been written for a * sufficiently large buffer, not including the terminating null * character. If the return value is not less than line_size, it means * that the log message was truncated to fit the buffer. */ int av_log_format_line2(void *ptr, int level, const char *fmt, va_list vl, char *line, int line_size, int *print_prefix); /** * Skip repeated messages, this requires the user app to use av_log() instead of * (f)printf as the 2 would otherwise interfere and lead to * "Last message repeated x times" messages below (f)printf messages with some * bad luck. * Also to receive the last, "last repeated" line if any, the user app must * call av_log(NULL, AV_LOG_QUIET, "%s", ""); at the end */ #define AV_LOG_SKIP_REPEATED … /** * Include the log severity in messages originating from codecs. * * Results in messages such as: * [rawvideo @ 0xDEADBEEF] [error] encode did not produce valid pts */ #define AV_LOG_PRINT_LEVEL … void av_log_set_flags(int arg); int av_log_get_flags(void); /** * @} */ #endif /* AVUTIL_LOG_H */
Codebase Browser
chromium