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(*
* AVOptions
* copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*)
(* This is a part of Pascal porting of ffmpeg.
* Originally by Victor Zinetz for Delphi and Free Pascal on Windows.
* For Mac OS X, some modifications were made by The Creative CAT, denoted as CAT
* in the source codes *)
// Revision: 11250
unit opt;
{$IFDEF FPC}
{$MODE DELPHI}
{$PACKENUM 4} (* use 4-byte enums *)
{$PACKRECORDS C} (* C/C++-compatible record packing *)
{$ELSE}
{$MINENUMSIZE 4} (* use 4-byte enums *)
{$ENDIF}
interface
uses
rational,
UConfig;
type
TAVOptionType = (
FF_OPT_TYPE_FLAGS,
FF_OPT_TYPE_INT,
FF_OPT_TYPE_INT64,
FF_OPT_TYPE_DOUBLE,
FF_OPT_TYPE_FLOAT,
FF_OPT_TYPE_STRING,
FF_OPT_TYPE_RATIONAL,
FF_OPT_TYPE_BINARY, ///< offset must point to a pointer immediately followed by an int for the length
FF_OPT_TYPE_CONST = 128
);
const
AV_OPT_FLAG_ENCODING_PARAM = 1; ///< a generic parameter which can be set by the user for muxing or encoding
AV_OPT_FLAG_DECODING_PARAM = 2; ///< a generic parameter which can be set by the user for demuxing or decoding
AV_OPT_FLAG_METADATA = 4; ///< some data extracted or inserted into the file like title, comment, ...
AV_OPT_FLAG_AUDIO_PARAM = 8;
AV_OPT_FLAG_VIDEO_PARAM = 16;
AV_OPT_FLAG_SUBTITLE_PARAM = 32;
type
(**
* AVOption.
*)
PAVOption = ^TAVOption;
TAVOption = record
name: pchar;
(**
* short English text help.
* @todo what about other languages
*)
help: pchar;
offset: integer; ///< offset to context structure where the parsed value should be stored
type_: TAVOptionType;
default_val: double;
min: double;
max: double;
flags: integer;
//FIXME think about enc-audio, ... style flags
unit_: pchar;
end;
{$IF LIBAVCODEC_VERSION >= 51039000} // 51.39.0
function av_find_opt (obj: Pointer; {const} name: PChar; {const} unit_: PChar; mask: integer; flags: integer): {const} PAVOption;
cdecl; external av__codec;
{$IFEND}
function av_set_string (obj: pointer; name: pchar; val: pchar): PAVOption;
cdecl; external av__codec;
function av_set_double (obj: pointer; name: pchar; n: double): PAVOption;
cdecl; external av__codec;
function av_set_q (obj: pointer; name: pchar; n: TAVRational): PAVOption;
cdecl; external av__codec;
function av_set_int (obj: pointer; name: pchar; n: int64): PAVOption;
cdecl; external av__codec;
function av_get_double (obj: pointer; name: pchar; o_out: PPointer): double;
cdecl; external av__codec;
function av_get_q (obj: pointer; name: pchar; o_out: PPointer): TAVRational;
cdecl; external av__codec;
function av_get_int (obj: pointer; name: pchar; o_out: PPointer): int64;
cdecl; external av__codec;
function av_get_string (obj: pointer; name: pchar; o_out: PPOinter; buf: pchar; buf_len: integer): pchar;
cdecl; external av__codec;
function av_next_option (obj: pointer; last: PAVOption): PAVOption;
cdecl; external av__codec;
function av_opt_show (obj: pointer; av_log_obj: pointer): integer;
cdecl; external av__codec;
procedure av_opt_set_defaults (s: pointer);
cdecl; external av__codec;
{$IF LIBAVCODEC_VERSION >= 51039000} // 51.39.0
procedure av_opt_set_defaults2 (s: Pointer; mask: integer; flags: integer);
cdecl; external av__codec;
{$IFEND}
implementation
end.
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