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Diffstat (limited to 'src/lib/ffmpeg/opt.pas')
| -rw-r--r-- | src/lib/ffmpeg/opt.pas | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/src/lib/ffmpeg/opt.pas b/src/lib/ffmpeg/opt.pas new file mode 100644 index 00000000..8669eaf6 --- /dev/null +++ b/src/lib/ffmpeg/opt.pas @@ -0,0 +1,261 @@ +(* + * 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. + * - Changes and updates by the UltraStar Deluxe Team + * + * Conversion of libavcodec/opt.h + * Max. avcodec version: 52.86.1, 24882, Wed Aug 23 07:00:00 2010 CET + * + *) + +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 *) +{$ENDIF} + +interface + +uses + ctypes, + rational, + UConfig; + +type + TAVOptionType = ( + FF_OPT_TYPE_FLAGS, + FF_OPT_TYPE_INT, + FF_OPT_TYPE_INT64, + FF_OPT_TYPE_DOUBLE, + FF_OPT_TYPE_FLOAT, + FF_OPT_TYPE_STRING, + FF_OPT_TYPE_RATIONAL, + FF_OPT_TYPE_BINARY, ///< offset must point to a pointer immediately followed by an int for the length + FF_OPT_TYPE_CONST = 128 + ); + +const + AV_OPT_FLAG_ENCODING_PARAM = 1; ///< a generic parameter which can be set by the user for muxing or encoding + AV_OPT_FLAG_DECODING_PARAM = 2; ///< a generic parameter which can be set by the user for demuxing or decoding + AV_OPT_FLAG_METADATA = 4; ///< some data extracted or inserted into the file like title, comment, ... + AV_OPT_FLAG_AUDIO_PARAM = 8; + AV_OPT_FLAG_VIDEO_PARAM = 16; + AV_OPT_FLAG_SUBTITLE_PARAM = 32; + +type + (** + * AVOption + *) + PAVOption = ^TAVOption; + TAVOption = record + name: {const} PAnsiChar; + + (** + * short English help text + * @todo What about other languages? + *) + help: {const} PAnsiChar; + + (** + * The offset relative to the context structure where the option + * value is stored. It should be 0 for named constants. + *) + offset: cint; + type_: TAVOptionType; + + (** + * the default value for scalar options + *) + default_val: cdouble; + min: cdouble; ///< minimum valid value for the option + max: cdouble; ///< maximum valid value for the option + + flags: cint; +//FIXME think about enc-audio, ... style flags + + (** + * The logical unit to which the option belongs. Non-constant + * options and corresponding named constants share the same + * unit. May be NULL. + *) + unit_: {const} PAnsiChar; + end; + +{$IF LIBAVCODEC_VERSION >= 52042000} // >= 52.42.0 +(** + * AVOption2. + * THIS IS NOT PART OF THE API/ABI YET! + * This is identical to AVOption except that default_val was replaced by + * an union, it should be compatible with AVOption on normal platforms. + *) +type + PAVOption2 = ^TAVOption2; + TAVOption2 = record + name : {const} PAnsiChar; + + (** + * short English help text + * @todo What about other languages? + *) + help : {const} PAnsiChar; + + (** + * The offset relative to the context structure where the option + * value is stored. It should be 0 for named constants. + *) + offset : cint; + type_ : TAVOptionType; + + (** + * the default value for scalar options + *) + default_val : record + case cint of + 0 : (dbl: cdouble); + 1 : (str: PAnsiChar); + end; + min : cdouble; + max : cdouble; + flags : cint; +//FIXME think about enc-audio, ... style flags + + (** + * The logical unit to which the option belongs. Non-constant + * options and corresponding named constants share the same + * unit. May be NULL. + *) + unit_: {const} PAnsiChar; + end; +{$IFEND} + +{$IF LIBAVCODEC_VERSION >= 51039000} // 51.39.0 +(** + * Look for an option in obj. Look only for the options which + * have the flags set as specified in mask and flags (that is, + * for which it is the case that opt->flags & mask == flags). + * + * @param[in] obj a pointer to a struct whose first element is a + * pointer to an AVClass + * @param[in] name the name of the option to look for + * @param[in] unit the unit of the option to look for, or any if NULL + * @return a pointer to the option found, or NULL if no option + * has been found + *) +function av_find_opt(obj: Pointer; {const} name: {const} PAnsiChar; {const} unit_: PAnsiChar; mask: cint; flags: cint): {const} PAVOption; + cdecl; external av__codec; +{$IFEND} + +{$IF LIBAVCODEC_VERSION_MAJOR < 53} + +(** + * @see av_set_string2() + *) +function av_set_string(obj: pointer; name: {const} PAnsiChar; val: {const} PAnsiChar): {const} PAVOption; + cdecl; external av__codec; deprecated; + +{$IF LIBAVCODEC_VERSION >= 51059000} // 51.59.0 +(** + * @return a pointer to the AVOption corresponding to the field set or + * NULL if no matching AVOption exists, or if the value val is not + * valid + * @see av_set_string3() + *) +function av_set_string2(obj: Pointer; name: {const} PAnsiChar; val: {const} PAnsiChar; alloc: cint): {const} PAVOption; + cdecl; external av__codec; deprecated; +{$IFEND} + +{$IFEND} + +{$IF LIBAVCODEC_VERSION >= 52007000} // 52.7.0 +(** + * Set the field of obj with the given name to value. + * + * @param[in] obj A struct whose first element is a pointer to an + * AVClass. + * @param[in] name the name of the field to set + * @param[in] val The value to set. If the field is not of a string + * type, then the given string is parsed. + * SI postfixes and some named scalars are supported. + * If the field is of a numeric type, it has to be a numeric or named + * scalar. Behavior with more than one scalar and +- infix operators + * is undefined. + * If the field is of a flags type, it has to be a sequence of numeric + * scalars or named flags separated by '+' or '-'. Prefixing a flag + * with '+' causes it to be set without affecting the other flags; + * similarly, '-' unsets a flag. + * @param[out] o_out if non-NULL put here a pointer to the AVOption + * found + * @param alloc when 1 then the old value will be av_freed() and the + * new av_strduped() + * when 0 then no av_free() nor av_strdup() will be used + * @return 0 if the value has been set, or an AVERROR code in case of + * error: + * AVERROR(ENOENT) if no matching option exists + * AVERROR(ERANGE) if the value is out of range + * AVERROR(EINVAL) if the value is not valid + *) +function av_set_string3(obj: Pointer; name: {const} PAnsiChar; val: {const} PAnsiChar; alloc: cint; out o_out: {const} PAVOption): cint; + cdecl; external av__codec; +{$IFEND} + +function av_set_double(obj: pointer; name: {const} PAnsiChar; n: cdouble): PAVOption; + cdecl; external av__codec; + +function av_set_q(obj: pointer; name: {const} PAnsiChar; n: TAVRational): PAVOption; + cdecl; external av__codec; + +function av_set_int(obj: pointer; name: {const} PAnsiChar; n: cint64): PAVOption; + cdecl; external av__codec; + +function av_get_double(obj: pointer; name: {const} PAnsiChar; var o_out: {const} PAVOption): cdouble; + cdecl; external av__codec; + +function av_get_q(obj: pointer; name: {const} PAnsiChar; var o_out: {const} PAVOption): TAVRational; + cdecl; external av__codec; + +function av_get_int(obj: pointer; name: {const} PAnsiChar; var o_out: {const} PAVOption): cint64; + cdecl; external av__codec; + +function av_get_string(obj: pointer; name: {const} PAnsiChar; var o_out: {const} PAVOption; buf: PAnsiChar; buf_len: cint): PAnsiChar; + cdecl; external av__codec; + +function av_next_option(obj: pointer; last: {const} PAVOption): PAVOption; + cdecl; external av__codec; + +function av_opt_show(obj: pointer; av_log_obj: pointer): cint; + cdecl; external av__codec; + +procedure av_opt_set_defaults(s: pointer); + cdecl; external av__codec; + +{$IF LIBAVCODEC_VERSION >= 51039000} // 51.39.0 +procedure av_opt_set_defaults2(s: Pointer; mask: cint; flags: cint); + cdecl; external av__codec; +{$IFEND} + +implementation + +end. |