| /* |
| * 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 FFMPEG_CMDUTILS_H |
| #define FFMPEG_CMDUTILS_H |
| |
| #include <stdint.h> |
| |
| #include "libavcodec/avcodec.h" |
| #include "libavfilter/avfilter.h" |
| #include "libavformat/avformat.h" |
| #include "libswscale/swscale.h" |
| |
| #ifdef __MINGW32__ |
| #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; |
| |
| /** |
| * this year, defined by the program for show_banner() |
| */ |
| extern const int this_year; |
| |
| extern AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB]; |
| extern AVFormatContext *avformat_opts; |
| extern struct SwsContext *sws_opts; |
| extern struct SwrContext *swr_opts; |
| extern AVDictionary *format_opts, *codec_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 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); |
| |
| /** |
| * Set the libav* libraries log level. |
| */ |
| int opt_loglevel(void *optctx, const char *opt, const char *arg); |
| |
| int opt_report(const char *opt); |
| |
| int opt_max_alloc(void *optctx, const char *opt, const char *arg); |
| |
| int opt_cpuflags(void *optctx, const char *opt, const char *arg); |
| |
| int opt_codec_debug(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Limit the execution time. |
| */ |
| int opt_timelimit(void *optctx, 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 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 |
| */ |
| 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 command line 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 SpecifierOpt { |
| char *specifier; /**< stream/chapter/program/... specifier */ |
| union { |
| uint8_t *str; |
| int i; |
| int64_t i64; |
| float f; |
| double dbl; |
| } u; |
| } SpecifierOpt; |
| |
| typedef struct { |
| const char *name; |
| int flags; |
| #define HAS_ARG 0x0001 |
| #define OPT_BOOL 0x0002 |
| #define OPT_EXPERT 0x0004 |
| #define OPT_STRING 0x0008 |
| #define OPT_VIDEO 0x0010 |
| #define OPT_AUDIO 0x0020 |
| #define OPT_INT 0x0080 |
| #define OPT_FLOAT 0x0100 |
| #define OPT_SUBTITLE 0x0200 |
| #define OPT_INT64 0x0400 |
| #define OPT_EXIT 0x0800 |
| #define OPT_DATA 0x1000 |
| #define OPT_PERFILE 0x2000 /* the option is per-file (currently ffmpeg-only). |
| implied by OPT_OFFSET or OPT_SPEC */ |
| #define OPT_OFFSET 0x4000 /* option is specified as an offset in a passed optctx */ |
| #define OPT_SPEC 0x8000 /* option is to be stored in an array of SpecifierOpt. |
| Implies OPT_OFFSET. Next element after the offset is |
| an int containing element count in the array. */ |
| #define OPT_TIME 0x10000 |
| #define OPT_DOUBLE 0x20000 |
| union { |
| void *dst_ptr; |
| int (*func_arg)(void *, const char *, const char *); |
| size_t off; |
| } u; |
| const char *help; |
| const char *argname; |
| } 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. |
| * @param alt_flags print only options that have at least one of those flags set |
| */ |
| void show_help_options(const OptionDef *options, const char *msg, int req_flags, |
| int rej_flags, int alt_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-avtool specific help handler. Implemented in each |
| * avtool, called by show_help(). |
| */ |
| void show_help_default(const char *opt, const char *arg); |
| |
| /** |
| * Generic -h handler common to all avtools. |
| */ |
| int show_help(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Parse the command line arguments. |
| * |
| * @param optctx an opaque options context |
| * @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(void *optctx, int argc, char **argv, const OptionDef *options, |
| void (* 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); |
| |
| /** |
| * 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 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. |
| * @return a pointer to the created dictionary |
| */ |
| AVDictionary *filter_codec_opts(AVDictionary *opts, enum AVCodecID codec_id, |
| AVFormatContext *s, AVStream *st, AVCodec *codec); |
| |
| /** |
| * 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. |
| * |
| * @return pointer to the created array of dictionaries, NULL if it |
| * cannot be created |
| */ |
| AVDictionary **setup_find_stream_info_opts(AVFormatContext *s, |
| AVDictionary *codec_opts); |
| |
| /** |
| * 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); |
| |
| /** |
| * 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); |
| |
| /** |
| * Print the version of the program to stdout. The version message |
| * depends on the current versions of the repository and of the libav* |
| * libraries. |
| * This option processing function does not utilize the arguments. |
| */ |
| int show_version(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Print the license of the program to stdout. The license depends on |
| * the license of the libraries compiled into the program. |
| * This option processing function does not utilize the arguments. |
| */ |
| int show_license(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Print a listing containing all the formats supported by the |
| * program. |
| * This option processing function does not utilize the arguments. |
| */ |
| int show_formats(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Print a listing containing all the codecs supported by the |
| * program. |
| * This option processing function does not utilize the arguments. |
| */ |
| int show_codecs(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Print a listing containing all the decoders supported by the |
| * program. |
| */ |
| int show_decoders(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Print a listing containing all the encoders supported by the |
| * program. |
| */ |
| int show_encoders(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Print a listing containing all the filters supported by the |
| * program. |
| * This option processing function does not utilize the arguments. |
| */ |
| int show_filters(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Print a listing containing all the bit stream filters supported by the |
| * program. |
| * This option processing function does not utilize the arguments. |
| */ |
| int show_bsfs(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Print a listing containing all the protocols supported by the |
| * program. |
| * This option processing function does not utilize the arguments. |
| */ |
| int show_protocols(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Print a listing containing all the pixel formats supported by the |
| * program. |
| * This option processing function does not utilize the arguments. |
| */ |
| int show_pix_fmts(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Print a listing containing all the standard channel layouts supported by |
| * the program. |
| * This option processing function does not utilize the arguments. |
| */ |
| int show_layouts(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * Print a listing containing all the sample formats supported by the |
| * program. |
| */ |
| int show_sample_fmts(void *optctx, const char *opt, const char *arg); |
| |
| /** |
| * 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 cmdutils_read_file(const char *filename, char **bufptr, size_t *size); |
| |
| /** |
| * 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); |
| |
| /** |
| * Do all the necessary cleanup and abort. |
| * This function is implemented in the avtools, not cmdutils. |
| */ |
| av_noreturn void exit_program(int ret); |
| |
| /** |
| * Realloc array to hold new_size elements of elem_size. |
| * Calls exit_program() on failure. |
| * |
| * @param elem_size size in bytes of each element |
| * @param size new element count will be written here |
| * @return reallocated array |
| */ |
| void *grow_array(void *array, int elem_size, int *size, int new_size); |
| |
| typedef struct FrameBuffer { |
| uint8_t *base[4]; |
| uint8_t *data[4]; |
| int linesize[4]; |
| |
| int h, w; |
| enum PixelFormat pix_fmt; |
| |
| int refcount; |
| struct FrameBuffer **pool; ///< head of the buffer pool |
| struct FrameBuffer *next; |
| } FrameBuffer; |
| |
| /** |
| * Get a frame from the pool. This is intended to be used as a callback for |
| * AVCodecContext.get_buffer. |
| * |
| * @param s codec context. s->opaque must be a pointer to the head of the |
| * buffer pool. |
| * @param frame frame->opaque will be set to point to the FrameBuffer |
| * containing the frame data. |
| */ |
| int codec_get_buffer(AVCodecContext *s, AVFrame *frame); |
| |
| /** |
| * A callback to be used for AVCodecContext.release_buffer along with |
| * codec_get_buffer(). |
| */ |
| void codec_release_buffer(AVCodecContext *s, AVFrame *frame); |
| |
| /** |
| * A callback to be used for AVFilterBuffer.free. |
| * @param fb buffer to free. fb->priv must be a pointer to the FrameBuffer |
| * containing the buffer data. |
| */ |
| void filter_release_buffer(AVFilterBuffer *fb); |
| |
| /** |
| * Free all the buffers in the pool. This must be called after all the |
| * buffers have been released. |
| */ |
| void free_buffer_pool(FrameBuffer **pool); |
| |
| #define GET_PIX_FMT_NAME(pix_fmt)\ |
| const char *name = av_get_pix_fmt_name(pix_fmt); |
| |
| #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); |
| |
| #define GET_CH_LAYOUT_NAME(ch_layout)\ |
| char name[16];\ |
| snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout); |
| |
| #define GET_CH_LAYOUT_DESC(ch_layout)\ |
| char name[128];\ |
| av_get_channel_layout_string(name, sizeof(name), 0, ch_layout); |
| |
| #endif /* CMDUTILS_H */ |