| /* |
| * Various utilities for command line tools |
| * copyright (c) 2003 Fabrice Bellard |
| * |
| * 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 |
| */ |
| |
| #ifndef FFTOOLS_CMDUTILS_H |
| #define FFTOOLS_CMDUTILS_H |
| |
| #include <stdint.h> |
| |
| #include "config.h" |
| #include "libavcodec/avcodec.h" |
| #include "libavfilter/avfilter.h" |
| #include "libavformat/avformat.h" |
| #include "libswscale/swscale.h" |
| |
| #ifdef _WIN32 |
| #undef main /* We don't want SDL to override our main() */ |
| #endif |
| |
| /** |
| * program name, defined by the program for show_version(). |
| */ |
| extern const char program_name[]; |
| |
| /** |
| * program birth year, defined by the program for show_banner() |
| */ |
| extern const int program_birth_year; |
| |
| extern AVDictionary *sws_dict; |
| extern AVDictionary *swr_opts; |
| extern AVDictionary *format_opts, *codec_opts; |
| extern int hide_banner; |
| |
| /** |
| * Initialize dynamic library loading |
| */ |
| void init_dynload(void); |
| |
| /** |
| * Uninitialize the cmdutils option system, in particular |
| * free the *_opts contexts and their contents. |
| */ |
| void uninit_opts(void); |
| |
| /** |
| * Trivial log callback. |
| * Only suitable for opt_help and similar since it lacks prefix handling. |
| */ |
| void log_callback_help(void* ptr, int level, const char* fmt, va_list vl); |
| |
| /** |
| * Fallback for options that are not explicitly handled, these will be |
| * parsed through AVOptions. |
| */ |
| int opt_default(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Limit the execution time. |
| */ |
| int opt_timelimit(void *optctx, const char *opt, const char *arg); |
| |
| enum OptionType { |
| OPT_TYPE_FUNC, |
| OPT_TYPE_BOOL, |
| OPT_TYPE_STRING, |
| OPT_TYPE_INT, |
| OPT_TYPE_INT64, |
| OPT_TYPE_FLOAT, |
| OPT_TYPE_DOUBLE, |
| OPT_TYPE_TIME, |
| }; |
| |
| /** |
| * Parse a string and return its corresponding value as a double. |
| * |
| * @param context the context of the value to be set (e.g. the |
| * corresponding command line option name) |
| * @param numstr the string to be parsed |
| * @param type the type (OPT_INT64 or OPT_FLOAT) as which the |
| * string should be parsed |
| * @param min the minimum valid accepted value |
| * @param max the maximum valid accepted value |
| */ |
| int parse_number(const char *context, const char *numstr, enum OptionType type, |
| double min, double max, double *dst); |
| |
| typedef struct SpecifierOpt { |
| char *specifier; /**< stream/chapter/program/... specifier */ |
| union { |
| uint8_t *str; |
| int i; |
| int64_t i64; |
| uint64_t ui64; |
| float f; |
| double dbl; |
| } u; |
| } SpecifierOpt; |
| |
| typedef struct SpecifierOptList { |
| SpecifierOpt *opt; |
| int nb_opt; |
| |
| /* Canonical option definition that was parsed into this list. */ |
| const struct OptionDef *opt_canon; |
| enum OptionType type; |
| } SpecifierOptList; |
| |
| typedef struct OptionDef { |
| const char *name; |
| enum OptionType type; |
| int flags; |
| |
| /* The OPT_TYPE_FUNC option takes an argument. |
| * Must not be used with other option types, as for those it holds: |
| * - OPT_TYPE_BOOL do not take an argument |
| * - all other types do |
| */ |
| #define OPT_FUNC_ARG (1 << 0) |
| /* Program will immediately exit after processing this option */ |
| #define OPT_EXIT (1 << 1) |
| /* Option is intended for advanced users. Only affects |
| * help output. |
| */ |
| #define OPT_EXPERT (1 << 2) |
| #define OPT_VIDEO (1 << 3) |
| #define OPT_AUDIO (1 << 4) |
| #define OPT_SUBTITLE (1 << 5) |
| #define OPT_DATA (1 << 6) |
| /* The option is per-file (currently ffmpeg-only). At least one of OPT_INPUT, |
| * OPT_OUTPUT, OPT_DECODER must be set when this flag is in use. |
| */ |
| #define OPT_PERFILE (1 << 7) |
| |
| /* Option is specified as an offset in a passed optctx. |
| * Always use as OPT_OFFSET in option definitions. */ |
| #define OPT_FLAG_OFFSET (1 << 8) |
| #define OPT_OFFSET (OPT_FLAG_OFFSET | OPT_PERFILE) |
| |
| /* Option is to be stored in a SpecifierOptList. |
| Always use as OPT_SPEC in option definitions. */ |
| #define OPT_FLAG_SPEC (1 << 9) |
| #define OPT_SPEC (OPT_FLAG_SPEC | OPT_OFFSET) |
| |
| /* Option applies per-stream (implies OPT_SPEC). */ |
| #define OPT_FLAG_PERSTREAM (1 << 10) |
| #define OPT_PERSTREAM (OPT_FLAG_PERSTREAM | OPT_SPEC) |
| |
| /* ffmpeg-only - specifies whether an OPT_PERFILE option applies to input, |
| * output, or both. */ |
| #define OPT_INPUT (1 << 11) |
| #define OPT_OUTPUT (1 << 12) |
| |
| /* This option is a "canonical" form, to which one or more alternatives |
| * exist. These alternatives are listed in u1.names_alt. */ |
| #define OPT_HAS_ALT (1 << 13) |
| /* This option is an alternative form of some other option, whose |
| * name is stored in u1.name_canon */ |
| #define OPT_HAS_CANON (1 << 14) |
| |
| /* ffmpeg-only - OPT_PERFILE may apply to standalone decoders */ |
| #define OPT_DECODER (1 << 15) |
| |
| union { |
| void *dst_ptr; |
| int (*func_arg)(void *, const char *, const char *); |
| size_t off; |
| } u; |
| const char *help; |
| const char *argname; |
| |
| union { |
| /* Name of the canonical form of this option. |
| * Is valid when OPT_HAS_CANON is set. */ |
| const char *name_canon; |
| /* A NULL-terminated list of alternate forms of this option. |
| * Is valid when OPT_HAS_ALT is set. */ |
| const char * const *names_alt; |
| } u1; |
| } OptionDef; |
| |
| /** |
| * Print help for all options matching specified flags. |
| * |
| * @param options a list of options |
| * @param msg title of this group. Only printed if at least one option matches. |
| * @param req_flags print only options which have all those flags set. |
| * @param rej_flags don't print options which have any of those flags set. |
| */ |
| void show_help_options(const OptionDef *options, const char *msg, int req_flags, |
| int rej_flags); |
| |
| /** |
| * Show help for all options with given flags in class and all its |
| * children. |
| */ |
| void show_help_children(const AVClass *class, int flags); |
| |
| /** |
| * Per-fftool specific help handler. Implemented in each |
| * fftool, called by show_help(). |
| */ |
| void show_help_default(const char *opt, const char *arg); |
| |
| /** |
| * Parse the command line arguments. |
| * |
| * @param optctx an opaque options context |
| * @param argc number of command line arguments |
| * @param argv values of command line arguments |
| * @param options Array with the definitions required to interpret every |
| * option of the form: -option_name [argument] |
| * @param parse_arg_function Name of the function called to process every |
| * argument without a leading option name flag. NULL if such arguments do |
| * not have to be processed. |
| */ |
| int parse_options(void *optctx, int argc, char **argv, const OptionDef *options, |
| int (* parse_arg_function)(void *optctx, const char*)); |
| |
| /** |
| * Parse one given option. |
| * |
| * @return on success 1 if arg was consumed, 0 otherwise; negative number on error |
| */ |
| int parse_option(void *optctx, const char *opt, const char *arg, |
| const OptionDef *options); |
| |
| /** |
| * An option extracted from the commandline. |
| * Cannot use AVDictionary because of options like -map which can be |
| * used multiple times. |
| */ |
| typedef struct Option { |
| const OptionDef *opt; |
| const char *key; |
| const char *val; |
| } Option; |
| |
| typedef struct OptionGroupDef { |
| /**< group name */ |
| const char *name; |
| /** |
| * Option to be used as group separator. Can be NULL for groups which |
| * are terminated by a non-option argument (e.g. ffmpeg output files) |
| */ |
| const char *sep; |
| /** |
| * Option flags that must be set on each option that is |
| * applied to this group |
| */ |
| int flags; |
| } OptionGroupDef; |
| |
| typedef struct OptionGroup { |
| const OptionGroupDef *group_def; |
| const char *arg; |
| |
| Option *opts; |
| int nb_opts; |
| |
| AVDictionary *codec_opts; |
| AVDictionary *format_opts; |
| AVDictionary *sws_dict; |
| AVDictionary *swr_opts; |
| } OptionGroup; |
| |
| /** |
| * A list of option groups that all have the same group type |
| * (e.g. input files or output files) |
| */ |
| typedef struct OptionGroupList { |
| const OptionGroupDef *group_def; |
| |
| OptionGroup *groups; |
| int nb_groups; |
| } OptionGroupList; |
| |
| typedef struct OptionParseContext { |
| OptionGroup global_opts; |
| |
| OptionGroupList *groups; |
| int nb_groups; |
| |
| /* parsing state */ |
| OptionGroup cur_group; |
| } OptionParseContext; |
| |
| /** |
| * Parse an options group and write results into optctx. |
| * |
| * @param optctx an app-specific options context. NULL for global options group |
| */ |
| int parse_optgroup(void *optctx, OptionGroup *g, const OptionDef *defs); |
| |
| /** |
| * Split the commandline into an intermediate form convenient for further |
| * processing. |
| * |
| * The commandline is assumed to be composed of options which either belong to a |
| * group (those with OPT_SPEC, OPT_OFFSET or OPT_PERFILE) or are global |
| * (everything else). |
| * |
| * A group (defined by an OptionGroupDef struct) is a sequence of options |
| * terminated by either a group separator option (e.g. -i) or a parameter that |
| * is not an option (doesn't start with -). A group without a separator option |
| * must always be first in the supplied groups list. |
| * |
| * All options within the same group are stored in one OptionGroup struct in an |
| * OptionGroupList, all groups with the same group definition are stored in one |
| * OptionGroupList in OptionParseContext.groups. The order of group lists is the |
| * same as the order of group definitions. |
| */ |
| int split_commandline(OptionParseContext *octx, int argc, char *argv[], |
| const OptionDef *options, |
| const OptionGroupDef *groups, int nb_groups); |
| |
| /** |
| * Free all allocated memory in an OptionParseContext. |
| */ |
| void uninit_parse_context(OptionParseContext *octx); |
| |
| /** |
| * Find the '-loglevel' option in the command line args and apply it. |
| */ |
| void parse_loglevel(int argc, char **argv, const OptionDef *options); |
| |
| /** |
| * Return index of option opt in argv or 0 if not found. |
| */ |
| int locate_option(int argc, char **argv, const OptionDef *options, |
| const char *optname); |
| |
| /** |
| * Check if the given stream matches a stream specifier. |
| * |
| * @param s Corresponding format context. |
| * @param st Stream from s to be checked. |
| * @param spec A stream specifier of the [v|a|s|d]:[\<stream index\>] form. |
| * |
| * @return 1 if the stream matches, 0 if it doesn't, <0 on error |
| */ |
| int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec); |
| |
| /** |
| * Filter out options for given codec. |
| * |
| * Create a new options dictionary containing only the options from |
| * opts which apply to the codec with ID codec_id. |
| * |
| * @param opts dictionary to place options in |
| * @param codec_id ID of the codec that should be filtered for |
| * @param s Corresponding format context. |
| * @param st A stream from s for which the options should be filtered. |
| * @param codec The particular codec for which the options should be filtered. |
| * If null, the default one is looked up according to the codec id. |
| * @param dst a pointer to the created dictionary |
| * @return a non-negative number on success, a negative error code on failure |
| */ |
| int filter_codec_opts(const AVDictionary *opts, enum AVCodecID codec_id, |
| AVFormatContext *s, AVStream *st, const AVCodec *codec, |
| AVDictionary **dst); |
| |
| /** |
| * Setup AVCodecContext options for avformat_find_stream_info(). |
| * |
| * Create an array of dictionaries, one dictionary for each stream |
| * contained in s. |
| * Each dictionary will contain the options from codec_opts which can |
| * be applied to the corresponding stream codec context. |
| */ |
| int setup_find_stream_info_opts(AVFormatContext *s, |
| AVDictionary *codec_opts, |
| AVDictionary ***dst); |
| |
| /** |
| * Print an error message to stderr, indicating filename and a human |
| * readable description of the error code err. |
| * |
| * If strerror_r() is not available the use of this function in a |
| * multithreaded application may be unsafe. |
| * |
| * @see av_strerror() |
| */ |
| static inline void print_error(const char *filename, int err) |
| { |
| av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, av_err2str(err)); |
| } |
| |
| /** |
| * Print the program banner to stderr. The banner contents depend on the |
| * current version of the repository and of the libav* libraries used by |
| * the program. |
| */ |
| void show_banner(int argc, char **argv, const OptionDef *options); |
| |
| /** |
| * Return a positive value if a line read from standard input |
| * starts with [yY], otherwise return 0. |
| */ |
| int read_yesno(void); |
| |
| /** |
| * Get a file corresponding to a preset file. |
| * |
| * If is_path is non-zero, look for the file in the path preset_name. |
| * Otherwise search for a file named arg.ffpreset in the directories |
| * $FFMPEG_DATADIR (if set), $HOME/.ffmpeg, and in the datadir defined |
| * at configuration time or in a "ffpresets" folder along the executable |
| * on win32, in that order. If no such file is found and |
| * codec_name is defined, then search for a file named |
| * codec_name-preset_name.avpreset in the above-mentioned directories. |
| * |
| * @param filename buffer where the name of the found filename is written |
| * @param filename_size size in bytes of the filename buffer |
| * @param preset_name name of the preset to search |
| * @param is_path tell if preset_name is a filename path |
| * @param codec_name name of the codec for which to look for the |
| * preset, may be NULL |
| */ |
| FILE *get_preset_file(char *filename, size_t filename_size, |
| const char *preset_name, int is_path, const char *codec_name); |
| |
| /** |
| * Realloc array to hold new_size elements of elem_size. |
| * |
| * @param array pointer to the array to reallocate, will be updated |
| * with a new pointer on success |
| * @param elem_size size in bytes of each element |
| * @param size new element count will be written here |
| * @param new_size number of elements to place in reallocated array |
| * @return a non-negative number on success, a negative error code on failure |
| */ |
| int grow_array(void **array, int elem_size, int *size, int new_size); |
| |
| /** |
| * Atomically add a new element to an array of pointers, i.e. allocate |
| * a new entry, reallocate the array of pointers and make the new last |
| * member of this array point to the newly allocated buffer. |
| * |
| * @param array array of pointers to reallocate |
| * @param elem_size size of the new element to allocate |
| * @param nb_elems pointer to the number of elements of the array array; |
| * *nb_elems will be incremented by one by this function. |
| * @return pointer to the newly allocated entry or NULL on failure |
| */ |
| void *allocate_array_elem(void *array, size_t elem_size, int *nb_elems); |
| |
| #define GROW_ARRAY(array, nb_elems)\ |
| grow_array((void**)&array, sizeof(*array), &nb_elems, nb_elems + 1) |
| |
| #define GET_PIX_FMT_NAME(pix_fmt)\ |
| const char *name = av_get_pix_fmt_name(pix_fmt); |
| |
| #define GET_CODEC_NAME(id)\ |
| const char *name = avcodec_descriptor_get(id)->name; |
| |
| #define GET_SAMPLE_FMT_NAME(sample_fmt)\ |
| const char *name = av_get_sample_fmt_name(sample_fmt) |
| |
| #define GET_SAMPLE_RATE_NAME(rate)\ |
| char name[16];\ |
| snprintf(name, sizeof(name), "%d", rate); |
| |
| double get_rotation(const int32_t *displaymatrix); |
| |
| /* read file contents into a string */ |
| char *file_read(const char *filename); |
| |
| #endif /* FFTOOLS_CMDUTILS_H */ |