* 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 <stdint.h>
-#include <inttypes.h>
#include "libavcodec/avcodec.h"
+#include "libavfilter/avfilter.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"
*/
extern const int program_birth_year;
-extern const int this_year;
-
-extern const char **opt_names;
-extern AVCodecContext *avcodec_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);
+
+/**
+ * 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);
+int opt_default(void *optctx, const char *opt, const char *arg);
/**
- * Sets the libav* libraries log level.
+ * Set the libav* libraries log level.
*/
-int opt_loglevel(const char *opt, const char *arg);
+int opt_loglevel(void *optctx, const char *opt, const char *arg);
/**
* Limit the execution time.
*/
-int opt_timelimit(const char *opt, const char *arg);
+int opt_timelimit(void *optctx, 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
+ * 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)
+ * 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);
+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)
+ * 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
*
* @see parse_date()
*/
-int64_t parse_time_or_die(const char *context, const char *timestr, int is_duration);
+int64_t parse_time_or_die(const char *context, const char *timestr,
+ int is_duration);
-typedef struct {
+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_STRING 0x0008
#define OPT_VIDEO 0x0010
#define OPT_AUDIO 0x0020
-#define OPT_GRAB 0x0040
#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_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 (*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)(void *, const char *, const char *);
+ size_t off;
} u;
const char *help;
const char *argname;
} OptionDef;
-void show_help_options(const OptionDef *options, const char *msg, int mask, int value);
+/**
+ * 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);
/**
- * Parses the command line arguments.
+ * 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>]
+ * 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);
-void set_context_opts(void *ctx, void *opts_ctx, int flags);
+/**
+ * Find the '-loglevel' option in the command line args and apply it.
+ */
+void parse_loglevel(int argc, char **argv, const OptionDef *options);
-void print_error(const char *filename, int err);
+/**
+ * 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);
-void list_fmts(void (*get_fmt_string)(char *buf, int buf_size, int fmt), int nb_fmts);
+/**
+ * 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);
/**
- * 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);
+int show_version(void *optctx, const char *opt, const char *arg);
/**
- * 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);
+int show_license(void *optctx, const char *opt, const char *arg);
/**
- * 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);
+int show_formats(void *optctx, const char *opt, const char *arg);
/**
- * Prints a listing containing all the codecs supported by the
+ * Print a listing containing all the codecs supported by the
* program.
*/
-void show_codecs(void);
+int show_codecs(void *optctx, const char *opt, const char *arg);
/**
- * Prints a listing containing all the filters supported by the
+ * Print a listing containing all the decoders supported by the
* program.
*/
-void show_filters(void);
+int show_decoders(void *optctx, const char *opt, const char *arg);
/**
- * Prints a listing containing all the bit stream filters supported by the
+ * Print a listing containing all the encoders supported by the
* program.
*/
-void show_bsfs(void);
+int show_encoders(void *optctx, const char *opt, const char *arg);
/**
- * Prints a listing containing all the protocols supported by the
+ * Print a listing containing all the filters supported by the
* program.
*/
-void show_protocols(void);
+int show_filters(void *optctx, const char *opt, const char *arg);
/**
- * Prints a listing containing all the pixel formats supported by the
+ * Print a listing containing all the bit stream filters supported by the
* program.
*/
-void show_pix_fmts(void);
+int show_bsfs(void *optctx, const char *opt, const char *arg);
/**
- * Returns a positive value if reads from standard input a line
- * starting with [yY], otherwise returns 0.
+ * 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);
-#endif /* FFMPEG_CMDUTILS_H */
+/**
+ * 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);
+
+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 */
projects / ffmpeg / blobdiff