mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-11-02 12:32:03 +01:00
Henrik RydgårdandClaude Opus 5.5
d0e3141f43
The ffmpeg submodule held prebuilt libraries for every platform next to the sources (about 1.5 GB checked out), and nothing uses those any more. Only the needed sources are copied in, from the submodule's commit, along with every header and template they include. The path is new, so checking out commits on either side of this works. It's also cut down to what PPSSPP uses: the H.264, AAC, MP3, ATRAC3 and ATRAC3+ decoders, the H.264 parser, the demuxers as before, and the FFV1 encoder, AVI muxer and file protocol for AVI dumping. config.h takes its CONFIG_ values from FFmpeg 3.0.2's own configure run with just those enabled. The raw H.264 demuxer stays even though nothing opens raw H.264: probing PSMF data uses it to identify the video stream's codec, which otherwise comes out as none. On top of that: - The files nothing links (configure would build them, but they're never pulled out of the static library, going by the GCC link map) are left out: mostly libavutil's crypto and hashing and the alternative DCT/IDCT/FFT versions. - libswresample isn't built, now that nothing uses it. - The H.264 decoder only does 8-bit video, which is all the PSP has. The SPS parser rejects any other bit depth, and the DSP files no longer build their 9- to 16-bit variants, which the linker kept because the init functions pick one by bit depth at run time. That's 160 files to compile instead of 277, and 391 of FFmpeg's vendored, about 5.8 MB. The README in ext/ffmpeg has what was done, the PPSSPP patches in the copy, how to add a component, and the tradeoffs. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
114 lines
5.2 KiB
C
114 lines
5.2 KiB
C
/*
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* Copyright (c) 2002 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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/**
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* @file
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* simple arithmetic expression evaluator
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*/
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#ifndef AVUTIL_EVAL_H
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#define AVUTIL_EVAL_H
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#include "avutil.h"
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typedef struct AVExpr AVExpr;
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/**
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* Parse and evaluate an expression.
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* Note, this is significantly slower than av_expr_eval().
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*
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* @param res a pointer to a double where is put the result value of
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* the expression, or NAN in case of error
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* @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)"
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* @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0}
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* @param const_values a zero terminated array of values for the identifiers from const_names
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* @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers
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* @param funcs1 NULL terminated array of function pointers for functions which take 1 argument
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* @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers
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* @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments
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* @param opaque a pointer which will be passed to all functions from funcs1 and funcs2
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* @param log_ctx parent logging context
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* @return >= 0 in case of success, a negative value corresponding to an
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* AVERROR code otherwise
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*/
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int av_expr_parse_and_eval(double *res, const char *s,
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const char * const *const_names, const double *const_values,
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const char * const *func1_names, double (* const *funcs1)(void *, double),
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const char * const *func2_names, double (* const *funcs2)(void *, double, double),
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void *opaque, int log_offset, void *log_ctx);
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/**
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* Parse an expression.
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*
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* @param expr a pointer where is put an AVExpr containing the parsed
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* value in case of successful parsing, or NULL otherwise.
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* The pointed to AVExpr must be freed with av_expr_free() by the user
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* when it is not needed anymore.
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* @param s expression as a zero terminated string, for example "1+2^3+5*5+sin(2/3)"
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* @param const_names NULL terminated array of zero terminated strings of constant identifiers, for example {"PI", "E", 0}
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* @param func1_names NULL terminated array of zero terminated strings of funcs1 identifiers
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* @param funcs1 NULL terminated array of function pointers for functions which take 1 argument
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* @param func2_names NULL terminated array of zero terminated strings of funcs2 identifiers
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* @param funcs2 NULL terminated array of function pointers for functions which take 2 arguments
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* @param log_ctx parent logging context
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* @return >= 0 in case of success, a negative value corresponding to an
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* AVERROR code otherwise
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*/
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int av_expr_parse(AVExpr **expr, const char *s,
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const char * const *const_names,
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const char * const *func1_names, double (* const *funcs1)(void *, double),
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const char * const *func2_names, double (* const *funcs2)(void *, double, double),
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int log_offset, void *log_ctx);
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/**
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* Evaluate a previously parsed expression.
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*
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* @param const_values a zero terminated array of values for the identifiers from av_expr_parse() const_names
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* @param opaque a pointer which will be passed to all functions from funcs1 and funcs2
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* @return the value of the expression
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*/
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double av_expr_eval(AVExpr *e, const double *const_values, void *opaque);
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/**
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* Free a parsed expression previously created with av_expr_parse().
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*/
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void av_expr_free(AVExpr *e);
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/**
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* Parse the string in numstr and return its value as a double. If
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* the string is empty, contains only whitespaces, or does not contain
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* an initial substring that has the expected syntax for a
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* floating-point number, no conversion is performed. In this case,
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* returns a value of zero and the value returned in tail is the value
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* of numstr.
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*
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* @param numstr a string representing a number, may contain one of
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* the International System number postfixes, for example 'K', 'M',
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* 'G'. If 'i' is appended after the postfix, powers of 2 are used
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* instead of powers of 10. The 'B' postfix multiplies the value by
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* 8, and can be appended after another postfix or used alone. This
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* allows using for example 'KB', 'MiB', 'G' and 'B' as postfix.
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* @param tail if non-NULL puts here the pointer to the char next
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* after the last parsed character
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*/
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double av_strtod(const char *numstr, char **tail);
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#endif /* AVUTIL_EVAL_H */
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