X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=cmdutils.h;h=3bb1cd616ba00cb774310ce3a6dd91519007a3a4;hb=eb040dbbd39898f03e5057a21b0981a8ffe9f37b;hp=4e566f3b021a5c0469af49c9171eb2f58a3fbe7a;hpb=1f631450fd177e49141845db0989e4760689d3e5;p=ffmpeg diff --git a/cmdutils.h b/cmdutils.h index 4e566f3b021..3bb1cd616ba 100644 --- a/cmdutils.h +++ b/cmdutils.h @@ -1,5 +1,112 @@ -#ifndef _CMD_UTILS_H -#define _CMD_UTILS_H +/* + * Various utilities for command line tools + * copyright (c) 2003 Fabrice Bellard + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef LIBAV_CMDUTILS_H +#define LIBAV_CMDUTILS_H + +#include + +#include "libavcodec/avcodec.h" +#include "libavfilter/avfilter.h" +#include "libavformat/avformat.h" +#include "libswscale/swscale.h" + +/** + * 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 const char **opt_names; +extern AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB]; +extern AVFormatContext *avformat_opts; +extern struct SwsContext *sws_opts; + +/** + * Initialize the cmdutils option system, in particular + * allocate the *_opts contexts. + */ +void init_opts(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 show_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(const char *opt, const char *arg); + +/** + * Set the libav* libraries log level. + */ +int opt_loglevel(const char *opt, const char *arg); + +/** + * Limit the execution time. + */ +int opt_timelimit(const char *opt, const char *arg); + +/** + * Parse a string and return its corresponding value as a double. + * Exit from the application if the string cannot be correctly + * parsed or the corresponding value is invalid. + * + * @param context the context of the value to be set (e.g. the + * corresponding commandline 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 + */ +double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max); + +/** + * Parse a string specifying a time and return its corresponding + * value as a number of microseconds. Exit from the application if + * the string cannot be correctly parsed. + * + * @param context the context of the value to be set (e.g. the + * corresponding commandline option name) + * @param timestr the string to be parsed + * @param is_duration a flag which tells how to interpret timestr, if + * not zero timestr is interpreted as a duration, otherwise as a + * date + * + * @see parse_date() + */ +int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration); typedef struct { const char *name; @@ -12,20 +119,180 @@ typedef struct { #define OPT_AUDIO 0x0020 #define OPT_GRAB 0x0040 #define OPT_INT 0x0080 -#define OPT_FLOAT 0x0080 - union { - void (*func_arg)(const char *); +#define OPT_FLOAT 0x0100 +#define OPT_SUBTITLE 0x0200 +#define OPT_FUNC2 0x0400 +#define OPT_INT64 0x0800 +#define OPT_EXIT 0x1000 +#define OPT_DATA 0x2000 + union { + void (*func_arg)(const char *); //FIXME passing error code as int return would be nicer then exit() in the func int *int_arg; char **str_arg; float *float_arg; + int (*func2_arg)(const char *, const char *); + int64_t *int64_arg; } u; const char *help; const char *argname; } OptionDef; void show_help_options(const OptionDef *options, const char *msg, int mask, int value); -void parse_options(int argc, char **argv, const OptionDef *options); -void parse_arg_file(const char *filename); + +/** + * Parse the 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. + */ +void parse_options(int argc, char **argv, const OptionDef *options, + void (* parse_arg_function)(const char*)); + +void set_context_opts(void *ctx, void *opts_ctx, int flags, AVCodec *codec); + +/** + * 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() + */ void print_error(const char *filename, int err); -#endif /* _CMD_UTILS_H */ +/** + * 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(void); + +/** + * Print the version of the program to stdout. The version message + * depends on the current versions of the repository and of the libav* + * libraries. + */ +void show_version(void); + +/** + * Print the license of the program to stdout. The license depends on + * the license of the libraries compiled into the program. + */ +void show_license(void); + +/** + * Print a listing containing all the formats supported by the + * program. + */ +void show_formats(void); + +/** + * Print a listing containing all the codecs supported by the + * program. + */ +void show_codecs(void); + +/** + * Print a listing containing all the filters supported by the + * program. + */ +void show_filters(void); + +/** + * Print a listing containing all the bit stream filters supported by the + * program. + */ +void show_bsfs(void); + +/** + * Print a listing containing all the protocols supported by the + * program. + */ +void show_protocols(void); + +/** + * Print a listing containing all the pixel formats supported by the + * program. + */ +void show_pix_fmts(void); + +/** + * Return a positive value if a line read from standard input + * starts with [yY], otherwise return 0. + */ +int read_yesno(void); + +/** + * Read the file with name filename, and put its content in a newly + * allocated 0-terminated buffer. + * + * @param bufptr location where pointer to buffer is returned + * @param size location where size of buffer is returned + * @return 0 in case of success, a negative value corresponding to an + * AVERROR error code in case of failure. + */ +int read_file(const char *filename, char **bufptr, size_t *size); + +typedef struct { + int64_t num_faulty_pts; /// Number of incorrect PTS values so far + int64_t num_faulty_dts; /// Number of incorrect DTS values so far + int64_t last_pts; /// PTS of the last frame + int64_t last_dts; /// DTS of the last frame +} PtsCorrectionContext; + +/** + * Reset the state of the PtsCorrectionContext. + */ +void init_pts_correction(PtsCorrectionContext *ctx); + +/** + * Attempt to guess proper monotonic timestamps for decoded video frames + * which might have incorrect times. Input timestamps may wrap around, in + * which case the output will as well. + * + * @param pts the pts field of the decoded AVPacket, as passed through + * AVCodecContext.reordered_opaque + * @param dts the dts field of the decoded AVPacket + * @return one of the input values, may be AV_NOPTS_VALUE + */ +int64_t guess_correct_pts(PtsCorrectionContext *ctx, int64_t pts, int64_t dts); + +/** + * 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, in that order. If no such file is found and + * codec_name is defined, then search for a file named + * codec_name-preset_name.ffpreset 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); + +typedef struct { + enum PixelFormat pix_fmt; +} FFSinkContext; + +extern AVFilter ffsink; + +/** + * Extract a frame from sink. + * + * @return a negative error in case of failure, 1 if one frame has + * been extracted successfully. + */ +int get_filtered_video_frame(AVFilterContext *sink, AVFrame *frame, + AVFilterBufferRef **picref, AVRational *pts_tb); + +#endif /* LIBAV_CMDUTILS_H */