(*
* 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
*
* This is a part of the Pascal port of ffmpeg.
* - Changes and updates by the UltraStar Deluxe Team
*
* Conversion of libavutil/log.h
* avutil version 51.34.101
*
*)
(**
* @file
* log
*)
type
(**
* 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.).
*)
PAVClass = ^TAVClass;
TAVClass = record
(**
* The name of the class; usually it is the same name as the
* context structure type to which the AVClass is associated.
*)
class_name: PAnsiChar;
(**
* A pointer to a function which returns the name of a context
* instance ctx associated with the class.
*)
item_name: function(ctx: pointer): PAnsiChar; cdecl;
(**
* a pointer to the first option specified in the class if any or NULL
*
* @see av_set_default_options()
*)
option: PAVOption;
(**
* LIBAVUTIL_VERSION with which this structure was created.
* This is used to allow fields to be added without requiring major
* version bumps everywhere.
*)
version: cint;
(**
* Offset in the structure where log_level_offset is stored.
* 0 means there is no such variable
*)
log_level_offset_offset: cint;
(**
* Offset in the structure where a pointer to the parent context for loging is stored.
* for example a decoder that uses eval.c could pass its AVCodecContext to eval as such
* parent context. And a av_log() implementation could then display the parent context
* can be NULL of course
*)
parent_log_context_offset: cint;
(**
* Return next AVOptions-enabled child or NULL
*)
child_next: function (obj: pointer; prev: pointer): pointer; cdecl;
(**
* Return an AVClass corresponding to next potential
* AVOptions-enabled child.
*
* The difference between child_next and this is that
* child_next iterates over _already existing_ objects, while
* child_class_next iterates over _all possible_ children.
*)
function child_class_next (prev: {const} PAVClass): {const} PAVClass; cdecl;
end;
const
AV_LOG_QUIET = -8;
(**
* Something went really wrong and we will crash now.
*)
AV_LOG_PANIC = 0;
(**
* 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.
*)
AV_LOG_FATAL = 8;
(**
* Something went wrong and cannot losslessly be recovered.
* However, not all future data is affected.
*)
AV_LOG_ERROR = 16;
(**
* Something somehow does not look correct. This may or may not
* lead to problems. An example would be the use of '-vstrict -2'.
*)
AV_LOG_WARNING = 24;
AV_LOG_INFO = 32;
AV_LOG_VERBOSE = 40;
(**
* Stuff which is only useful for libav* developers.
*)
AV_LOG_DEBUG = 48;
(**
* 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 av_vlog callback
* function.
*
* @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, lower values signifying
* higher importance.
* @param fmt The format string (printf-compatible) that specifies how
* subsequent arguments are converted to output.
* @see av_vlog
*)
{** to be translated if needed
void av_log(void *avcl, int level, const char *fmt, ...) av_printf_format(3, 4);
**}
type
va_list = pointer;
procedure av_vlog(avcl: pointer; level: cint; fmt: {const} PAnsiChar; dummy: va_list);
cdecl; external av__util;
function av_log_get_level(): cint;
cdecl; external av__util;
procedure av_log_set_level(level: cint);
cdecl; external av__util;
{** to be translated if needed
void av_log_set_callback(void (*)(void*, int, const char*, va_list));
void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl);
**}
function av_default_item_name (ctx: pointer): PAnsiChar;
cdecl; external av__util;
(**
* Format a line of log the same way as the default callback.
* @param line buffer to receive the formated 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
*)
procedure av_log_format_line(ptr: pointer; level: cint; fmt: {const} PAnsiChar; vl: va_list;
line: PAnsiChar; line_size: cint; print_prefix: Pcint);
cdecl; external av__util;
(**
* av_dlog macros
* Useful to print debug messages that shouldn't get compiled in normally.
*)
(** to be translated if needed
#ifdef DEBUG
# define av_dlog(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
#else
# define av_dlog(pctx, ...) do { if (0) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__); } while (0)
#endif
**)
(**
* 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
*)
const
AV_LOG_SKIP_REPEATED = 1;
procedure av_log_set_flags(arg: cint);
cdecl; external av__util;
