X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=cmdutils.h;h=989d769dfe697e1147ab511dfcba403381ed1450;hb=f1f15c3c1a813c86e669aeb58a07c10d9cc21893;hp=beba333236e22c14885e0b53171f74d9a74f8241;hpb=95137bbbb472d1c0abf1181cbdfdc6eda4341c20;p=coroid%2Flibav_saccubus.git diff --git a/cmdutils.h b/cmdutils.h index beba33323..989d769df 100644 --- a/cmdutils.h +++ b/cmdutils.h @@ -2,28 +2,30 @@ * Various utilities for command line tools * copyright (c) 2003 Fabrice Bellard * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * 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. * - * FFmpeg is distributed in the hope that it will be useful, + * 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 FFmpeg; if not, write to the Free Software + * License along with Libav; 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 +#ifndef LIBAV_CMDUTILS_H +#define LIBAV_CMDUTILS_H + +#include -#include #include "libavcodec/avcodec.h" +#include "libavfilter/avfilter.h" #include "libavformat/avformat.h" #include "libswscale/swscale.h" @@ -37,20 +39,47 @@ extern const char program_name[]; */ extern const int program_birth_year; -extern const char **opt_names; -extern AVCodecContext *avctx_opts[CODEC_TYPE_NB]; +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); /** - * Fallback for options that are not explixitly handled, these will be + * 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); /** - * Parses a string and returns its corresponding value as a double. - * Exits from the application if the string cannot be correctly + * 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 @@ -64,21 +93,32 @@ int opt_default(const char *opt, const char *arg); double parse_number_or_die(const char *context, const char *numstr, int type, double min, double max); /** - * Parses a string specifying a time and returns its corresponding - * value as a number of microseconds. Exits from the application if + * 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 \p timestr, if - * not zero \p timestr is interpreted as a duration, otherwise as a + * @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; @@ -92,16 +132,21 @@ typedef struct { #define OPT_INT 0x0080 #define OPT_FLOAT 0x0100 #define OPT_SUBTITLE 0x0200 -#define OPT_FUNC2 0x0400 -#define OPT_INT64 0x0800 -#define OPT_EXIT 0x1000 +#define OPT_INT64 0x0400 +#define OPT_EXIT 0x0800 +#define OPT_DATA 0x1000 +#define OPT_FUNC2 0x2000 +#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 (*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; + void *dst_ptr; + int (*func_arg)(const char *, const char *); + int (*func2_arg)(void *, const char *, const char *); + size_t off; } u; const char *help; const char *argname; @@ -110,44 +155,218 @@ typedef struct { void show_help_options(const OptionDef *options, const char *msg, int mask, int value); /** - * Parses the command line arguments. + * 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 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 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); + +/** + * 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]:[] 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. + * @return a pointer to the created dictionary + */ +AVDictionary *filter_codec_opts(AVDictionary *opts, enum CodecID codec_id, AVFormatContext *s, AVStream *st); -void set_context_opts(void *ctx, void *opts_ctx, int flags); +/** + * 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); /** - * Prints the program banner to stderr. The banner contents depend on the + * 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); /** - * Prints the version of the program to stdout. The version message + * 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); /** - * Prints the license of the program to stdout. The license depends on + * 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); /** - * Prints a listing containing all the formats supported by the + * Print a listing containing all the formats supported by the * program. */ void show_formats(void); -#endif /* FFMPEG_CMDUTILS_H */ +/** + * 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); + +/** + * Do all the necessary cleanup and abort. + * This function is implemented in the avtools, not cmdutils. + */ +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); + +#endif /* LIBAV_CMDUTILS_H */