Merging upstream version 127.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 354 insertions, 247 deletions

diff --git a/media/ffvpx/libavutil/opt.h b/media/ffvpx/libavutil/opt.h
index 461b5d3b6b..e6013662f6 100644
--- a/media/ffvpx/libavutil/opt.h
+++ b/media/ffvpx/libavutil/opt.h
@@ -43,6 +43,16 @@
  * ("objects"). An option can have a help text, a type and a range of possible
  * values. Options may then be enumerated, read and written to.
  *
+ * There are two modes of access to members of AVOption and its child structs.
+ * One is called 'native access', and refers to access from the code that
+ * declares the AVOption in question.  The other is 'foreign access', and refers
+ * to access from other code.
+ *
+ * Certain struct members in this header are documented as 'native access only'
+ * or similar - it means that only the code that declared the AVOption in
+ * question is allowed to access the field. This allows us to extend the
+ * semantics of those fields without breaking API compatibility.
+ *
  * @section avoptions_implement Implementing AVOptions
  * This section describes how to add AVOptions capabilities to a struct.
  *
@@ -221,7 +231,7 @@
  */
 
 enum AVOptionType{
-    AV_OPT_TYPE_FLAGS,
+    AV_OPT_TYPE_FLAGS = 1,
     AV_OPT_TYPE_INT,
     AV_OPT_TYPE_INT64,
     AV_OPT_TYPE_DOUBLE,
@@ -238,14 +248,99 @@ enum AVOptionType{
     AV_OPT_TYPE_VIDEO_RATE, ///< offset must point to AVRational
     AV_OPT_TYPE_DURATION,
     AV_OPT_TYPE_COLOR,
-#if FF_API_OLD_CHANNEL_LAYOUT
-    AV_OPT_TYPE_CHANNEL_LAYOUT,
-#endif
     AV_OPT_TYPE_BOOL,
     AV_OPT_TYPE_CHLAYOUT,
+
+    /**
+     * May be combined with another regular option type to declare an array
+     * option.
+     *
+     * For array options, @ref AVOption.offset should refer to a pointer
+     * corresponding to the option type. The pointer should be immediately
+     * followed by an unsigned int that will store the number of elements in the
+     * array.
+     */
+    AV_OPT_TYPE_FLAG_ARRAY = (1 << 16),
 };
 
 /**
+ * A generic parameter which can be set by the user for muxing or encoding.
+ */
+#define AV_OPT_FLAG_ENCODING_PARAM  (1 << 0)
+/**
+ * A generic parameter which can be set by the user for demuxing or decoding.
+ */
+#define AV_OPT_FLAG_DECODING_PARAM  (1 << 1)
+#define AV_OPT_FLAG_AUDIO_PARAM     (1 << 3)
+#define AV_OPT_FLAG_VIDEO_PARAM     (1 << 4)
+#define AV_OPT_FLAG_SUBTITLE_PARAM  (1 << 5)
+/**
+ * The option is intended for exporting values to the caller.
+ */
+#define AV_OPT_FLAG_EXPORT          (1 << 6)
+/**
+ * The option may not be set through the AVOptions API, only read.
+ * This flag only makes sense when AV_OPT_FLAG_EXPORT is also set.
+ */
+#define AV_OPT_FLAG_READONLY        (1 << 7)
+/**
+ * A generic parameter which can be set by the user for bit stream filtering.
+ */
+#define AV_OPT_FLAG_BSF_PARAM       (1 << 8)
+
+/**
+ * A generic parameter which can be set by the user at runtime.
+ */
+#define AV_OPT_FLAG_RUNTIME_PARAM   (1 << 15)
+/**
+ * A generic parameter which can be set by the user for filtering.
+ */
+#define AV_OPT_FLAG_FILTERING_PARAM (1 << 16)
+/**
+ * Set if option is deprecated, users should refer to AVOption.help text for
+ * more information.
+ */
+#define AV_OPT_FLAG_DEPRECATED      (1 << 17)
+/**
+ * Set if option constants can also reside in child objects.
+ */
+#define AV_OPT_FLAG_CHILD_CONSTS    (1 << 18)
+
+/**
+ * May be set as default_val for AV_OPT_TYPE_FLAG_ARRAY options.
+ */
+typedef struct AVOptionArrayDef {
+    /**
+     * Native access only.
+     *
+     * Default value of the option, as would be serialized by av_opt_get() (i.e.
+     * using the value of sep as the separator).
+     */
+    const char         *def;
+
+    /**
+     * Minimum number of elements in the array. When this field is non-zero, def
+     * must be non-NULL and contain at least this number of elements.
+     */
+    unsigned            size_min;
+    /**
+     * Maximum number of elements in the array, 0 when unlimited.
+     */
+    unsigned            size_max;
+
+    /**
+     * Separator between array elements in string representations of this
+     * option, used by av_opt_set() and av_opt_get(). It must be a printable
+     * ASCII character, excluding alphanumeric and the backslash. A comma is
+     * used when sep=0.
+     *
+     * The separator and the backslash must be backslash-escaped in order to
+     * appear in string representations of the option value.
+     */
+    char                sep;
+} AVOptionArrayDef;
+
+/**
  * AVOption
  */
 typedef struct AVOption {
@@ -258,6 +353,8 @@ typedef struct AVOption {
     const char *help;
 
     /**
+     * Native access only.
+     *
      * The offset relative to the context structure where the option
      * value is stored. It should be 0 for named constants.
      */
@@ -265,6 +362,7 @@ typedef struct AVOption {
     enum AVOptionType type;
 
     /**
+     * Native access only, except when documented otherwise.
      * the default value for scalar options
      */
     union {
@@ -273,31 +371,22 @@ typedef struct AVOption {
         const char *str;
         /* TODO those are unused now */
         AVRational q;
+
+        /**
+         * Used for AV_OPT_TYPE_FLAG_ARRAY options. May be NULL.
+         *
+         * Foreign access to some members allowed, as noted in AVOptionArrayDef
+         * documentation.
+         */
+        const AVOptionArrayDef *arr;
     } default_val;
     double min;                 ///< minimum valid value for the option
     double max;                 ///< maximum valid value for the option
 
+    /**
+     * A combination of AV_OPT_FLAG_*.
+     */
     int flags;
-#define AV_OPT_FLAG_ENCODING_PARAM  1   ///< a generic parameter which can be set by the user for muxing or encoding
-#define AV_OPT_FLAG_DECODING_PARAM  2   ///< a generic parameter which can be set by the user for demuxing or decoding
-#define AV_OPT_FLAG_AUDIO_PARAM     8
-#define AV_OPT_FLAG_VIDEO_PARAM     16
-#define AV_OPT_FLAG_SUBTITLE_PARAM  32
-/**
- * The option is intended for exporting values to the caller.
- */
-#define AV_OPT_FLAG_EXPORT          64
-/**
- * The option may not be set through the AVOptions API, only read.
- * This flag only makes sense when AV_OPT_FLAG_EXPORT is also set.
- */
-#define AV_OPT_FLAG_READONLY        128
-#define AV_OPT_FLAG_BSF_PARAM       (1<<8) ///< a generic parameter which can be set by the user for bit stream filtering
-#define AV_OPT_FLAG_RUNTIME_PARAM   (1<<15) ///< a generic parameter which can be set by the user at runtime
-#define AV_OPT_FLAG_FILTERING_PARAM (1<<16) ///< a generic parameter which can be set by the user for filtering
-#define AV_OPT_FLAG_DEPRECATED      (1<<17) ///< set if option is deprecated, users should refer to AVOption.help text for more information
-#define AV_OPT_FLAG_CHILD_CONSTS    (1<<18) ///< set if option constants can also reside in child objects
-//FIXME think about enc-audio, ... style flags
 
     /**
      * The logical unit to which the option belongs. Non-constant
@@ -376,15 +465,9 @@ typedef struct AVOptionRanges {
 } AVOptionRanges;
 
 /**
- * Show the obj options.
- *
- * @param req_flags requested flags for the options to show. Show only the
- * options for which it is opt->flags & req_flags.
- * @param rej_flags rejected flags for the options to show. Show only the
- * options for which it is !(opt->flags & req_flags).
- * @param av_log_obj log context to use for showing the options
+ * @defgroup opt_mng AVOption (un)initialization and inspection.
+ * @{
  */
-int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags);
 
 /**
  * Set the values of all AVOption fields to their default values.
@@ -405,160 +488,36 @@ void av_opt_set_defaults(void *s);
 void av_opt_set_defaults2(void *s, int mask, int flags);
 
 /**
- * Parse the key/value pairs list in opts. For each key/value pair
- * found, stores the value in the field in ctx that is named like the
- * key. ctx must be an AVClass context, storing is done using
- * AVOptions.
- *
- * @param opts options string to parse, may be NULL
- * @param key_val_sep a 0-terminated list of characters used to
- * separate key from value
- * @param pairs_sep a 0-terminated list of characters used to separate
- * two pairs from each other
- * @return the number of successfully set key/value pairs, or a negative
- * value corresponding to an AVERROR code in case of error:
- * AVERROR(EINVAL) if opts cannot be parsed,
- * the error code issued by av_opt_set() if a key/value pair
- * cannot be set
- */
-int av_set_options_string(void *ctx, const char *opts,
-                          const char *key_val_sep, const char *pairs_sep);
-
-/**
- * Parse the key-value pairs list in opts. For each key=value pair found,
- * set the value of the corresponding option in ctx.
- *
- * @param ctx          the AVClass object to set options on
- * @param opts         the options string, key-value pairs separated by a
- *                     delimiter
- * @param shorthand    a NULL-terminated array of options names for shorthand
- *                     notation: if the first field in opts has no key part,
- *                     the key is taken from the first element of shorthand;
- *                     then again for the second, etc., until either opts is
- *                     finished, shorthand is finished or a named option is
- *                     found; after that, all options must be named
- * @param key_val_sep  a 0-terminated list of characters used to separate
- *                     key from value, for example '='
- * @param pairs_sep    a 0-terminated list of characters used to separate
- *                     two pairs from each other, for example ':' or ','
- * @return  the number of successfully set key=value pairs, or a negative
- *          value corresponding to an AVERROR code in case of error:
- *          AVERROR(EINVAL) if opts cannot be parsed,
- *          the error code issued by av_set_string3() if a key/value pair
- *          cannot be set
- *
- * Options names must use only the following characters: a-z A-Z 0-9 - . / _
- * Separators must use characters distinct from option names and from each
- * other.
- */
-int av_opt_set_from_string(void *ctx, const char *opts,
-                           const char *const *shorthand,
-                           const char *key_val_sep, const char *pairs_sep);
-/**
  * Free all allocated objects in obj.
  */
 void av_opt_free(void *obj);
 
 /**
- * Check whether a particular flag is set in a flags field.
- *
- * @param field_name the name of the flag field option
- * @param flag_name the name of the flag to check
- * @return non-zero if the flag is set, zero if the flag isn't set,
- *         isn't of the right type, or the flags field doesn't exist.
- */
-int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name);
-
-/**
- * Set all the options from a given dictionary on an object.
- *
- * @param obj a struct whose first element is a pointer to AVClass
- * @param options options to process. This dictionary will be freed and replaced
- *                by a new one containing all options not found in obj.
- *                Of course this new dictionary needs to be freed by caller
- *                with av_dict_free().
- *
- * @return 0 on success, a negative AVERROR if some option was found in obj,
- *         but could not be set.
- *
- * @see av_dict_copy()
- */
-int av_opt_set_dict(void *obj, struct AVDictionary **options);
-
-
-/**
- * Set all the options from a given dictionary on an object.
- *
- * @param obj a struct whose first element is a pointer to AVClass
- * @param options options to process. This dictionary will be freed and replaced
- *                by a new one containing all options not found in obj.
- *                Of course this new dictionary needs to be freed by caller
- *                with av_dict_free().
- * @param search_flags A combination of AV_OPT_SEARCH_*.
- *
- * @return 0 on success, a negative AVERROR if some option was found in obj,
- *         but could not be set.
+ * Iterate over all AVOptions belonging to obj.
  *
- * @see av_dict_copy()
+ * @param obj an AVOptions-enabled struct or a double pointer to an
+ *            AVClass describing it.
+ * @param prev result of the previous call to av_opt_next() on this object
+ *             or NULL
+ * @return next AVOption or NULL
  */
-int av_opt_set_dict2(void *obj, struct AVDictionary **options, int search_flags);
+const AVOption *av_opt_next(const void *obj, const AVOption *prev);
 
 /**
- * Extract a key-value pair from the beginning of a string.
- *
- * @param ropts        pointer to the options string, will be updated to
- *                     point to the rest of the string (one of the pairs_sep
- *                     or the final NUL)
- * @param key_val_sep  a 0-terminated list of characters used to separate
- *                     key from value, for example '='
- * @param pairs_sep    a 0-terminated list of characters used to separate
- *                     two pairs from each other, for example ':' or ','
- * @param flags        flags; see the AV_OPT_FLAG_* values below
- * @param rkey         parsed key; must be freed using av_free()
- * @param rval         parsed value; must be freed using av_free()
- *
- * @return  >=0 for success, or a negative value corresponding to an
- *          AVERROR code in case of error; in particular:
- *          AVERROR(EINVAL) if no key is present
+ * Iterate over AVOptions-enabled children of obj.
  *
+ * @param prev result of a previous call to this function or NULL
+ * @return next AVOptions-enabled child or NULL
  */
-int av_opt_get_key_value(const char **ropts,
-                         const char *key_val_sep, const char *pairs_sep,
-                         unsigned flags,
-                         char **rkey, char **rval);
-
-enum {
-
-    /**
-     * Accept to parse a value without a key; the key will then be returned
-     * as NULL.
-     */
-    AV_OPT_FLAG_IMPLICIT_KEY = 1,
-};
+void *av_opt_child_next(void *obj, void *prev);
 
 /**
- * @defgroup opt_eval_funcs Evaluating option strings
- * @{
- * This group of functions can be used to evaluate option strings
- * and get numbers out of them. They do the same thing as av_opt_set(),
- * except the result is written into the caller-supplied pointer.
- *
- * @param obj a struct whose first element is a pointer to AVClass.
- * @param o an option for which the string is to be evaluated.
- * @param val string to be evaluated.
- * @param *_out value of the string will be written here.
+ * Iterate over potential AVOptions-enabled children of parent.
  *
- * @return 0 on success, a negative number on failure.
- */
-int av_opt_eval_flags (void *obj, const AVOption *o, const char *val, int        *flags_out);
-int av_opt_eval_int   (void *obj, const AVOption *o, const char *val, int        *int_out);
-int av_opt_eval_int64 (void *obj, const AVOption *o, const char *val, int64_t    *int64_out);
-int av_opt_eval_float (void *obj, const AVOption *o, const char *val, float      *float_out);
-int av_opt_eval_double(void *obj, const AVOption *o, const char *val, double     *double_out);
-int av_opt_eval_q     (void *obj, const AVOption *o, const char *val, AVRational *q_out);
-/**
- * @}
+ * @param iter a pointer where iteration state is stored.
+ * @return AVClass corresponding to next potential child or NULL
  */
+const AVClass *av_opt_child_class_iterate(const AVClass *parent, void **iter);
 
 #define AV_OPT_SEARCH_CHILDREN   (1 << 0) /**< Search in possible children of the
                                                given object first. */
@@ -633,31 +592,161 @@ const AVOption *av_opt_find2(void *obj, const char *name, const char *unit,
                              int opt_flags, int search_flags, void **target_obj);
 
 /**
- * Iterate over all AVOptions belonging to obj.
+ * Show the obj options.
  *
- * @param obj an AVOptions-enabled struct or a double pointer to an
- *            AVClass describing it.
- * @param prev result of the previous call to av_opt_next() on this object
- *             or NULL
- * @return next AVOption or NULL
+ * @param req_flags requested flags for the options to show. Show only the
+ * options for which it is opt->flags & req_flags.
+ * @param rej_flags rejected flags for the options to show. Show only the
+ * options for which it is !(opt->flags & req_flags).
+ * @param av_log_obj log context to use for showing the options
  */
-const AVOption *av_opt_next(const void *obj, const AVOption *prev);
+int av_opt_show2(void *obj, void *av_log_obj, int req_flags, int rej_flags);
 
 /**
- * Iterate over AVOptions-enabled children of obj.
+ * Extract a key-value pair from the beginning of a string.
+ *
+ * @param ropts        pointer to the options string, will be updated to
+ *                     point to the rest of the string (one of the pairs_sep
+ *                     or the final NUL)
+ * @param key_val_sep  a 0-terminated list of characters used to separate
+ *                     key from value, for example '='
+ * @param pairs_sep    a 0-terminated list of characters used to separate
+ *                     two pairs from each other, for example ':' or ','
+ * @param flags        flags; see the AV_OPT_FLAG_* values below
+ * @param rkey         parsed key; must be freed using av_free()
+ * @param rval         parsed value; must be freed using av_free()
+ *
+ * @return  >=0 for success, or a negative value corresponding to an
+ *          AVERROR code in case of error; in particular:
+ *          AVERROR(EINVAL) if no key is present
  *
- * @param prev result of a previous call to this function or NULL
- * @return next AVOptions-enabled child or NULL
  */
-void *av_opt_child_next(void *obj, void *prev);
+int av_opt_get_key_value(const char **ropts,
+                         const char *key_val_sep, const char *pairs_sep,
+                         unsigned flags,
+                         char **rkey, char **rval);
+
+enum {
+
+    /**
+     * Accept to parse a value without a key; the key will then be returned
+     * as NULL.
+     */
+    AV_OPT_FLAG_IMPLICIT_KEY = 1,
+};
 
 /**
- * Iterate over potential AVOptions-enabled children of parent.
+ * @}
+ */
+
+/**
+ * @defgroup opt_write Setting and modifying option values
+ * @{
+ */
+
+/**
+ * Parse the key/value pairs list in opts. For each key/value pair
+ * found, stores the value in the field in ctx that is named like the
+ * key. ctx must be an AVClass context, storing is done using
+ * AVOptions.
  *
- * @param iter a pointer where iteration state is stored.
- * @return AVClass corresponding to next potential child or NULL
+ * @param opts options string to parse, may be NULL
+ * @param key_val_sep a 0-terminated list of characters used to
+ * separate key from value
+ * @param pairs_sep a 0-terminated list of characters used to separate
+ * two pairs from each other
+ * @return the number of successfully set key/value pairs, or a negative
+ * value corresponding to an AVERROR code in case of error:
+ * AVERROR(EINVAL) if opts cannot be parsed,
+ * the error code issued by av_opt_set() if a key/value pair
+ * cannot be set
  */
-const AVClass *av_opt_child_class_iterate(const AVClass *parent, void **iter);
+int av_set_options_string(void *ctx, const char *opts,
+                          const char *key_val_sep, const char *pairs_sep);
+
+/**
+ * Parse the key-value pairs list in opts. For each key=value pair found,
+ * set the value of the corresponding option in ctx.
+ *
+ * @param ctx          the AVClass object to set options on
+ * @param opts         the options string, key-value pairs separated by a
+ *                     delimiter
+ * @param shorthand    a NULL-terminated array of options names for shorthand
+ *                     notation: if the first field in opts has no key part,
+ *                     the key is taken from the first element of shorthand;
+ *                     then again for the second, etc., until either opts is
+ *                     finished, shorthand is finished or a named option is
+ *                     found; after that, all options must be named
+ * @param key_val_sep  a 0-terminated list of characters used to separate
+ *                     key from value, for example '='
+ * @param pairs_sep    a 0-terminated list of characters used to separate
+ *                     two pairs from each other, for example ':' or ','
+ * @return  the number of successfully set key=value pairs, or a negative
+ *          value corresponding to an AVERROR code in case of error:
+ *          AVERROR(EINVAL) if opts cannot be parsed,
+ *          the error code issued by av_set_string3() if a key/value pair
+ *          cannot be set
+ *
+ * Options names must use only the following characters: a-z A-Z 0-9 - . / _
+ * Separators must use characters distinct from option names and from each
+ * other.
+ */
+int av_opt_set_from_string(void *ctx, const char *opts,
+                           const char *const *shorthand,
+                           const char *key_val_sep, const char *pairs_sep);
+
+/**
+ * Set all the options from a given dictionary on an object.
+ *
+ * @param obj a struct whose first element is a pointer to AVClass
+ * @param options options to process. This dictionary will be freed and replaced
+ *                by a new one containing all options not found in obj.
+ *                Of course this new dictionary needs to be freed by caller
+ *                with av_dict_free().
+ *
+ * @return 0 on success, a negative AVERROR if some option was found in obj,
+ *         but could not be set.
+ *
+ * @see av_dict_copy()
+ */
+int av_opt_set_dict(void *obj, struct AVDictionary **options);
+
+
+/**
+ * Set all the options from a given dictionary on an object.
+ *
+ * @param obj a struct whose first element is a pointer to AVClass
+ * @param options options to process. This dictionary will be freed and replaced
+ *                by a new one containing all options not found in obj.
+ *                Of course this new dictionary needs to be freed by caller
+ *                with av_dict_free().
+ * @param search_flags A combination of AV_OPT_SEARCH_*.
+ *
+ * @return 0 on success, a negative AVERROR if some option was found in obj,
+ *         but could not be set.
+ *
+ * @see av_dict_copy()
+ */
+int av_opt_set_dict2(void *obj, struct AVDictionary **options, int search_flags);
+
+/**
+ * Copy options from src object into dest object.
+ *
+ * The underlying AVClass of both src and dest must coincide. The guarantee
+ * below does not apply if this is not fulfilled.
+ *
+ * Options that require memory allocation (e.g. string or binary) are malloc'ed in dest object.
+ * Original memory allocated for such options is freed unless both src and dest options points to the same memory.
+ *
+ * Even on error it is guaranteed that allocated options from src and dest
+ * no longer alias each other afterwards; in particular calling av_opt_free()
+ * on both src and dest is safe afterwards if dest has been memdup'ed from src.
+ *
+ * @param dest Object to copy from
+ * @param src  Object to copy into
+ * @return 0 on success, negative on error
+ */
+int av_opt_copy(void *dest, const void *src);
 
 /**
  * @defgroup opt_set_funcs Option setting functions
@@ -697,10 +786,6 @@ int av_opt_set_image_size(void *obj, const char *name, int w, int h, int search_
 int av_opt_set_pixel_fmt (void *obj, const char *name, enum AVPixelFormat fmt, int search_flags);
 int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search_flags);
 int av_opt_set_video_rate(void *obj, const char *name, AVRational val, int search_flags);
-#if FF_API_OLD_CHANNEL_LAYOUT
-attribute_deprecated
-int av_opt_set_channel_layout(void *obj, const char *name, int64_t ch_layout, int search_flags);
-#endif
 int av_opt_set_chlayout(void *obj, const char *name, const AVChannelLayout *layout, int search_flags);
 /**
  * @note Any old dictionary present is discarded and replaced with a copy of the new one. The
@@ -726,6 +811,12 @@ int av_opt_set_dict_val(void *obj, const char *name, const AVDictionary *val, in
 
 /**
  * @}
+ * @}
+ */
+
+/**
+ * @defgroup opt_read Reading option values
+ * @{
  */
 
 /**
@@ -756,10 +847,6 @@ int av_opt_get_image_size(void *obj, const char *name, int search_flags, int *w_
 int av_opt_get_pixel_fmt (void *obj, const char *name, int search_flags, enum AVPixelFormat *out_fmt);
 int av_opt_get_sample_fmt(void *obj, const char *name, int search_flags, enum AVSampleFormat *out_fmt);
 int av_opt_get_video_rate(void *obj, const char *name, int search_flags, AVRational *out_val);
-#if FF_API_OLD_CHANNEL_LAYOUT
-attribute_deprecated
-int av_opt_get_channel_layout(void *obj, const char *name, int search_flags, int64_t *ch_layout);
-#endif
 int av_opt_get_chlayout(void *obj, const char *name, int search_flags, AVChannelLayout *layout);
 /**
  * @param[out] out_val The returned dictionary is a copy of the actual value and must
@@ -769,70 +856,40 @@ int av_opt_get_dict_val(void *obj, const char *name, int search_flags, AVDiction
 /**
  * @}
  */
-/**
- * Gets a pointer to the requested field in a struct.
- * This function allows accessing a struct even when its fields are moved or
- * renamed since the application making the access has been compiled,
- *
- * @returns a pointer to the field, it can be cast to the correct type and read
- *          or written to.
- */
-void *av_opt_ptr(const AVClass *avclass, void *obj, const char *name);
-
-/**
- * Free an AVOptionRanges struct and set it to NULL.
- */
-void av_opt_freep_ranges(AVOptionRanges **ranges);
 
 /**
- * Get a list of allowed ranges for the given option.
- *
- * The returned list may depend on other fields in obj like for example profile.
- *
- * @param flags is a bitmask of flags, undefined flags should not be set and should be ignored
- *              AV_OPT_SEARCH_FAKE_OBJ indicates that the obj is a double pointer to a AVClass instead of a full instance
- *              AV_OPT_MULTI_COMPONENT_RANGE indicates that function may return more than one component, @see AVOptionRanges
+ * @defgroup opt_eval_funcs Evaluating option strings
+ * @{
+ * This group of functions can be used to evaluate option strings
+ * and get numbers out of them. They do the same thing as av_opt_set(),
+ * except the result is written into the caller-supplied pointer.
  *
- * The result must be freed with av_opt_freep_ranges.
+ * @param obj a struct whose first element is a pointer to AVClass.
+ * @param o an option for which the string is to be evaluated.
+ * @param val string to be evaluated.
+ * @param *_out value of the string will be written here.
  *
- * @return number of compontents returned on success, a negative errro code otherwise
+ * @return 0 on success, a negative number on failure.
  */
-int av_opt_query_ranges(AVOptionRanges **, void *obj, const char *key, int flags);
-
+int av_opt_eval_flags (void *obj, const AVOption *o, const char *val, int        *flags_out);
+int av_opt_eval_int   (void *obj, const AVOption *o, const char *val, int        *int_out);
+int av_opt_eval_int64 (void *obj, const AVOption *o, const char *val, int64_t    *int64_out);
+int av_opt_eval_float (void *obj, const AVOption *o, const char *val, float      *float_out);
+int av_opt_eval_double(void *obj, const AVOption *o, const char *val, double     *double_out);
+int av_opt_eval_q     (void *obj, const AVOption *o, const char *val, AVRational *q_out);
 /**
- * Copy options from src object into dest object.
- *
- * The underlying AVClass of both src and dest must coincide. The guarantee
- * below does not apply if this is not fulfilled.
- *
- * Options that require memory allocation (e.g. string or binary) are malloc'ed in dest object.
- * Original memory allocated for such options is freed unless both src and dest options points to the same memory.
- *
- * Even on error it is guaranteed that allocated options from src and dest
- * no longer alias each other afterwards; in particular calling av_opt_free()
- * on both src and dest is safe afterwards if dest has been memdup'ed from src.
- *
- * @param dest Object to copy from
- * @param src  Object to copy into
- * @return 0 on success, negative on error
+ * @}
  */
-int av_opt_copy(void *dest, const void *src);
 
 /**
- * Get a default list of allowed ranges for the given option.
- *
- * This list is constructed without using the AVClass.query_ranges() callback
- * and can be used as fallback from within the callback.
- *
- * @param flags is a bitmask of flags, undefined flags should not be set and should be ignored
- *              AV_OPT_SEARCH_FAKE_OBJ indicates that the obj is a double pointer to a AVClass instead of a full instance
- *              AV_OPT_MULTI_COMPONENT_RANGE indicates that function may return more than one component, @see AVOptionRanges
- *
- * The result must be freed with av_opt_free_ranges.
+ * Gets a pointer to the requested field in a struct.
+ * This function allows accessing a struct even when its fields are moved or
+ * renamed since the application making the access has been compiled,
  *
- * @return number of compontents returned on success, a negative errro code otherwise
+ * @returns a pointer to the field, it can be cast to the correct type and read
+ *          or written to.
  */
-int av_opt_query_ranges_default(AVOptionRanges **, void *obj, const char *key, int flags);
+void *av_opt_ptr(const AVClass *avclass, void *obj, const char *name);
 
 /**
  * Check if given option is set to its default value.
@@ -860,6 +917,15 @@ int av_opt_is_set_to_default(void *obj, const AVOption *o);
  */
 int av_opt_is_set_to_default_by_name(void *obj, const char *name, int search_flags);
 
+/**
+ * Check whether a particular flag is set in a flags field.
+ *
+ * @param field_name the name of the flag field option
+ * @param flag_name the name of the flag to check
+ * @return non-zero if the flag is set, zero if the flag isn't set,
+ *         isn't of the right type, or the flags field doesn't exist.
+ */
+int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name);
 
 #define AV_OPT_SERIALIZE_SKIP_DEFAULTS              0x00000001  ///< Serialize options that are not set to default values only.
 #define AV_OPT_SERIALIZE_OPT_FLAGS_EXACT            0x00000002  ///< Serialize options that exactly match opt_flags only.
@@ -884,6 +950,47 @@ int av_opt_is_set_to_default_by_name(void *obj, const char *name, int search_fla
  */
 int av_opt_serialize(void *obj, int opt_flags, int flags, char **buffer,
                      const char key_val_sep, const char pairs_sep);
+
+/**
+ * @}
+ */
+
+/**
+ * Free an AVOptionRanges struct and set it to NULL.
+ */
+void av_opt_freep_ranges(AVOptionRanges **ranges);
+
+/**
+ * Get a list of allowed ranges for the given option.
+ *
+ * The returned list may depend on other fields in obj like for example profile.
+ *
+ * @param flags is a bitmask of flags, undefined flags should not be set and should be ignored
+ *              AV_OPT_SEARCH_FAKE_OBJ indicates that the obj is a double pointer to a AVClass instead of a full instance
+ *              AV_OPT_MULTI_COMPONENT_RANGE indicates that function may return more than one component, @see AVOptionRanges
+ *
+ * The result must be freed with av_opt_freep_ranges.
+ *
+ * @return number of compontents returned on success, a negative errro code otherwise
+ */
+int av_opt_query_ranges(AVOptionRanges **, void *obj, const char *key, int flags);
+
+/**
+ * Get a default list of allowed ranges for the given option.
+ *
+ * This list is constructed without using the AVClass.query_ranges() callback
+ * and can be used as fallback from within the callback.
+ *
+ * @param flags is a bitmask of flags, undefined flags should not be set and should be ignored
+ *              AV_OPT_SEARCH_FAKE_OBJ indicates that the obj is a double pointer to a AVClass instead of a full instance
+ *              AV_OPT_MULTI_COMPONENT_RANGE indicates that function may return more than one component, @see AVOptionRanges
+ *
+ * The result must be freed with av_opt_free_ranges.
+ *
+ * @return number of compontents returned on success, a negative errro code otherwise
+ */
+int av_opt_query_ranges_default(AVOptionRanges **, void *obj, const char *key, int flags);
+
 /**
  * @}
  */