* 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 <inttypes.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[];
/**
- * Parses a string and returns its corresponding value as a double.
- * Exits from the application if the string cannot be correctly
+ * 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(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
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()
#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
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 *);
+ int (*func_arg)(const char *, const char *);
int64_t *int64_arg;
} u;
const char *help;
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 options Array with the definitions required to interpret every
- * option of the form: -<option_name> [<argument>]
+ * 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*));
+/**
+ * Filter out options for given codec.
+ */
+AVDictionary *filter_codec_opts(AVDictionary *opts, enum CodecID codec_id, int encoder);
+
+/*
+ * Setup AVCodecContext options for avformat_find_stream_info.
+ */
+AVDictionary **setup_find_stream_info_opts(AVFormatContext *s);
+
+/**
+ * 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.
- * @param program_name name of the program
- * @param program_birth_year year of birth of the program
*/
-void show_banner(const char *program_name, int program_birth_year);
+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.
- * @param program_name name of the program
*/
-void show_version(const char *program_name);
+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);
-#endif /* FFMPEG_CMDUTILS_H */
+/**
+ * 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 */