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cmdutils.h

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00001 /*
00002  * Various utilities for command line tools
00003  * copyright (c) 2003 Fabrice Bellard
00004  *
00005  * This file is part of Libav.
00006  *
00007  * Libav is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * Libav is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with Libav; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #ifndef LIBAV_CMDUTILS_H
00023 #define LIBAV_CMDUTILS_H
00024 
00025 #include <stdint.h>
00026 
00027 #include "libavcodec/avcodec.h"
00028 #include "libavfilter/avfilter.h"
00029 #include "libavformat/avformat.h"
00030 #include "libswscale/swscale.h"
00031 
00035 extern const char program_name[];
00036 
00040 extern const int program_birth_year;
00041 
00042 extern AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB];
00043 extern AVFormatContext *avformat_opts;
00044 extern struct SwsContext *sws_opts;
00045 extern AVDictionary *format_opts, *codec_opts;
00046 
00051 void init_opts(void);
00056 void uninit_opts(void);
00057 
00062 void log_callback_help(void* ptr, int level, const char* fmt, va_list vl);
00063 
00068 int opt_default(const char *opt, const char *arg);
00069 
00073 int opt_loglevel(const char *opt, const char *arg);
00074 
00078 int opt_timelimit(const char *opt, const char *arg);
00079 
00093 double parse_number_or_die(const char *context, const char *numstr, int type,
00094                            double min, double max);
00095 
00110 int64_t parse_time_or_die(const char *context, const char *timestr,
00111                           int is_duration);
00112 
00113 typedef struct SpecifierOpt {
00114     char *specifier;    
00115     union {
00116         uint8_t *str;
00117         int        i;
00118         int64_t  i64;
00119         float      f;
00120         double   dbl;
00121     } u;
00122 } SpecifierOpt;
00123 
00124 typedef struct {
00125     const char *name;
00126     int flags;
00127 #define HAS_ARG    0x0001
00128 #define OPT_BOOL   0x0002
00129 #define OPT_EXPERT 0x0004
00130 #define OPT_STRING 0x0008
00131 #define OPT_VIDEO  0x0010
00132 #define OPT_AUDIO  0x0020
00133 #define OPT_GRAB   0x0040
00134 #define OPT_INT    0x0080
00135 #define OPT_FLOAT  0x0100
00136 #define OPT_SUBTITLE 0x0200
00137 #define OPT_INT64  0x0400
00138 #define OPT_EXIT   0x0800
00139 #define OPT_DATA   0x1000
00140 #define OPT_FUNC2  0x2000
00141 #define OPT_OFFSET 0x4000       /* option is specified as an offset in a passed optctx */
00142 #define OPT_SPEC   0x8000       /* option is to be stored in an array of SpecifierOpt.
00143                                    Implies OPT_OFFSET. Next element after the offset is
00144                                    an int containing element count in the array. */
00145 #define OPT_TIME  0x10000
00146 #define OPT_DOUBLE 0x20000
00147      union {
00148         void *dst_ptr;
00149         int (*func_arg)(const char *, const char *);
00150         int (*func2_arg)(void *, const char *, const char *);
00151         size_t off;
00152     } u;
00153     const char *help;
00154     const char *argname;
00155 } OptionDef;
00156 
00157 void show_help_options(const OptionDef *options, const char *msg, int mask,
00158                        int value);
00159 
00164 void show_help_children(const AVClass *class, int flags);
00165 
00176 void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
00177                    void (* parse_arg_function)(void *optctx, const char*));
00178 
00184 int parse_option(void *optctx, const char *opt, const char *arg,
00185                  const OptionDef *options);
00186 
00190 void parse_loglevel(int argc, char **argv, const OptionDef *options);
00191 
00201 int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec);
00202 
00213 AVDictionary *filter_codec_opts(AVDictionary *opts, enum CodecID codec_id,
00214                                 AVFormatContext *s, AVStream *st);
00215 
00227 AVDictionary **setup_find_stream_info_opts(AVFormatContext *s,
00228                                            AVDictionary *codec_opts);
00229 
00239 void print_error(const char *filename, int err);
00240 
00246 void show_banner(void);
00247 
00253 void show_version(void);
00254 
00259 void show_license(void);
00260 
00265 void show_formats(void);
00266 
00271 void show_codecs(void);
00272 
00277 void show_filters(void);
00278 
00283 void show_bsfs(void);
00284 
00289 void show_protocols(void);
00290 
00295 void show_pix_fmts(void);
00296 
00301 int show_sample_fmts(const char *opt, const char *arg);
00302 
00307 int read_yesno(void);
00308 
00318 int cmdutils_read_file(const char *filename, char **bufptr, size_t *size);
00319 
00320 typedef struct {
00321     int64_t num_faulty_pts; 
00322     int64_t num_faulty_dts; 
00323     int64_t last_pts;       
00324     int64_t last_dts;       
00325 } PtsCorrectionContext;
00326 
00330 void init_pts_correction(PtsCorrectionContext *ctx);
00331 
00342 int64_t guess_correct_pts(PtsCorrectionContext *ctx, int64_t pts, int64_t dts);
00343 
00361 FILE *get_preset_file(char *filename, size_t filename_size,
00362                       const char *preset_name, int is_path, const char *codec_name);
00363 
00364 typedef struct {
00365     enum PixelFormat pix_fmt;
00366 } AVSinkContext;
00367 
00368 extern AVFilter avsink;
00369 
00376 int get_filtered_video_frame(AVFilterContext *sink, AVFrame *frame,
00377                              AVFilterBufferRef **picref, AVRational *pts_tb);
00378 
00383 void exit_program(int ret);
00384 
00393 void *grow_array(void *array, int elem_size, int *size, int new_size);
00394 
00395 #endif /* LIBAV_CMDUTILS_H */
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