mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
c661cb6672
This makes the code simpler and avoids mixing designated and non-designated initializers in a potentially unsafe way in avconv.
574 lines
18 KiB
C
574 lines
18 KiB
C
/*
|
|
* 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 <stdint.h>
|
|
|
|
#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 AVCodecContext *avcodec_opts[AVMEDIA_TYPE_NB];
|
|
extern AVFormatContext *avformat_opts;
|
|
extern struct SwsContext *sws_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 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(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);
|
|
|
|
/**
|
|
* 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 OptionDef {
|
|
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 avconv-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 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.
|
|
*/
|
|
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);
|
|
|
|
/**
|
|
* 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. avconv output files)
|
|
*/
|
|
const char *sep;
|
|
} OptionGroupDef;
|
|
|
|
typedef struct OptionGroup {
|
|
const OptionGroupDef *group_def;
|
|
const char *arg;
|
|
|
|
Option *opts;
|
|
int nb_opts;
|
|
|
|
AVDictionary *codec_opts;
|
|
AVDictionary *format_opts;
|
|
struct SwsContext *sws_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);
|
|
|
|
/**
|
|
* 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.
|
|
* @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(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.
|
|
*/
|
|
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.
|
|
*/
|
|
int show_license(void *optctx, const char *opt, const char *arg);
|
|
|
|
/**
|
|
* Print a listing containing all the formats supported by the
|
|
* program.
|
|
*/
|
|
int show_formats(void *optctx, const char *opt, const char *arg);
|
|
|
|
/**
|
|
* Print a listing containing all the codecs supported by the
|
|
* program.
|
|
*/
|
|
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.
|
|
*/
|
|
int show_filters(void *optctx, const char *opt, const char *arg);
|
|
|
|
/**
|
|
* Print a listing containing all the bit stream filters supported by the
|
|
* program.
|
|
*/
|
|
int show_bsfs(void *optctx, const char *opt, const char *arg);
|
|
|
|
/**
|
|
* Print a listing containing all the protocols supported by the
|
|
* program.
|
|
*/
|
|
int show_protocols(void *optctx, const char *opt, const char *arg);
|
|
|
|
/**
|
|
* Print a listing containing all the pixel formats supported by the
|
|
* program.
|
|
*/
|
|
int show_pix_fmts(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 filename file to read from
|
|
* @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);
|
|
|
|
typedef struct PtsCorrectionContext {
|
|
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 ctx the PtsCorrectionContext carrying stream pts information
|
|
* @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.avpreset in the directories
|
|
* $AVCONV_DATADIR (if set), $HOME/.avconv, 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.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.
|
|
* Calls exit() on failure.
|
|
*
|
|
* @param array array to reallocate
|
|
* @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 reallocated array
|
|
*/
|
|
void *grow_array(void *array, int elem_size, int *size, int new_size);
|
|
|
|
#define GROW_ARRAY(array, nb_elems)\
|
|
array = grow_array(array, sizeof(*array), &nb_elems, nb_elems + 1)
|
|
|
|
typedef struct FrameBuffer {
|
|
uint8_t *base[4];
|
|
uint8_t *data[4];
|
|
int linesize[4];
|
|
|
|
int h, w;
|
|
enum AVPixelFormat 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 /* LIBAV_CMDUTILS_H */
|