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GStreamer 0.10 Core Reference Manual | ![]() |
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#include <gst/gst.h> typedef GstTagList; enum GstTagMergeMode; enum GstTagFlag; void (*GstTagForeachFunc) (const GstTagList *list, const gchar *tag, gpointer user_data); void (*GstTagMergeFunc) (GValue *dest, const GValue *src); #define GST_TAG_TITLE #define GST_TAG_ARTIST #define GST_TAG_ALBUM #define GST_TAG_DATE #define GST_TAG_GENRE #define GST_TAG_COMMENT #define GST_TAG_EXTENDED_COMMENT #define GST_TAG_TRACK_NUMBER #define GST_TAG_TRACK_COUNT #define GST_TAG_ALBUM_VOLUME_NUMBER #define GST_TAG_ALBUM_VOLUME_COUNT #define GST_TAG_LOCATION #define GST_TAG_DESCRIPTION #define GST_TAG_VERSION #define GST_TAG_ISRC #define GST_TAG_ORGANIZATION #define GST_TAG_COPYRIGHT #define GST_TAG_CONTACT #define GST_TAG_LICENSE #define GST_TAG_PERFORMER #define GST_TAG_DURATION #define GST_TAG_CODEC #define GST_TAG_VIDEO_CODEC #define GST_TAG_AUDIO_CODEC #define GST_TAG_BITRATE #define GST_TAG_NOMINAL_BITRATE #define GST_TAG_MINIMUM_BITRATE #define GST_TAG_MAXIMUM_BITRATE #define GST_TAG_SERIAL #define GST_TAG_ENCODER #define GST_TAG_ENCODER_VERSION #define GST_TAG_TRACK_GAIN #define GST_TAG_TRACK_PEAK #define GST_TAG_ALBUM_GAIN #define GST_TAG_ALBUM_PEAK #define GST_TAG_LANGUAGE_CODE #define GST_TAG_IMAGE #define GST_TAG_PREVIEW_IMAGE void gst_tag_register (const gchar *name, GstTagFlag flag, GType type, const gchar *nick, const gchar *blurb, GstTagMergeFunc func); void gst_tag_merge_use_first (GValue *dest, const GValue *src); void gst_tag_merge_strings_with_comma (GValue *dest, const GValue *src); gboolean gst_tag_exists (const gchar *tag); GType gst_tag_get_type (const gchar *tag); const gchar* gst_tag_get_nick (const gchar *tag); const gchar* gst_tag_get_description (const gchar *tag); GstTagFlag gst_tag_get_flag (const gchar *tag); gboolean gst_tag_is_fixed (const gchar *tag); GstTagList* gst_tag_list_new (void); gboolean gst_is_tag_list (gconstpointer p); gboolean gst_tag_list_is_empty (const GstTagList *list); GstTagList* gst_tag_list_copy (const GstTagList *list); void gst_tag_list_insert (GstTagList *into, const GstTagList *from, GstTagMergeMode mode); GstTagList* gst_tag_list_merge (const GstTagList *list1, const GstTagList *list2, GstTagMergeMode mode); void gst_tag_list_free (GstTagList *list); guint gst_tag_list_get_tag_size (const GstTagList *list, const gchar *tag); void gst_tag_list_add (GstTagList *list, GstTagMergeMode mode, const gchar *tag, ...); void gst_tag_list_add_values (GstTagList *list, GstTagMergeMode mode, const gchar *tag, ...); void gst_tag_list_add_valist (GstTagList *list, GstTagMergeMode mode, const gchar *tag, va_list var_args); void gst_tag_list_add_valist_values (GstTagList *list, GstTagMergeMode mode, const gchar *tag, va_list var_args); void gst_tag_list_remove_tag (GstTagList *list, const gchar *tag); void gst_tag_list_foreach (const GstTagList *list, GstTagForeachFunc func, gpointer user_data); const GValue* gst_tag_list_get_value_index (const GstTagList *list, const gchar *tag, guint index); gboolean gst_tag_list_copy_value (GValue *dest, const GstTagList *list, const gchar *tag); gboolean gst_tag_list_get_char (const GstTagList *list, const gchar *tag, gchar *value); gboolean gst_tag_list_get_char_index (const GstTagList *list, const gchar *tag, guint index, gchar *value); gboolean gst_tag_list_get_uchar (const GstTagList *list, const gchar *tag, guchar *value); gboolean gst_tag_list_get_uchar_index (const GstTagList *list, const gchar *tag, guint index, guchar *value); gboolean gst_tag_list_get_boolean (const GstTagList *list, const gchar *tag, gboolean *value); gboolean gst_tag_list_get_boolean_index (const GstTagList *list, const gchar *tag, guint index, gboolean *value); gboolean gst_tag_list_get_int (const GstTagList *list, const gchar *tag, gint *value); gboolean gst_tag_list_get_int_index (const GstTagList *list, const gchar *tag, guint index, gint *value); gboolean gst_tag_list_get_uint (const GstTagList *list, const gchar *tag, guint *value); gboolean gst_tag_list_get_uint_index (const GstTagList *list, const gchar *tag, guint index, guint *value); gboolean gst_tag_list_get_long (const GstTagList *list, const gchar *tag, glong *value); gboolean gst_tag_list_get_long_index (const GstTagList *list, const gchar *tag, guint index, glong *value); gboolean gst_tag_list_get_ulong (const GstTagList *list, const gchar *tag, gulong *value); gboolean gst_tag_list_get_ulong_index (const GstTagList *list, const gchar *tag, guint index, gulong *value); gboolean gst_tag_list_get_int64 (const GstTagList *list, const gchar *tag, gint64 *value); gboolean gst_tag_list_get_int64_index (const GstTagList *list, const gchar *tag, guint index, gint64 *value); gboolean gst_tag_list_get_uint64 (const GstTagList *list, const gchar *tag, guint64 *value); gboolean gst_tag_list_get_uint64_index (const GstTagList *list, const gchar *tag, guint index, guint64 *value); gboolean gst_tag_list_get_float (const GstTagList *list, const gchar *tag, gfloat *value); gboolean gst_tag_list_get_float_index (const GstTagList *list, const gchar *tag, guint index, gfloat *value); gboolean gst_tag_list_get_double (const GstTagList *list, const gchar *tag, gdouble *value); gboolean gst_tag_list_get_double_index (const GstTagList *list, const gchar *tag, guint index, gdouble *value); gboolean gst_tag_list_get_string (const GstTagList *list, const gchar *tag, gchar **value); gboolean gst_tag_list_get_string_index (const GstTagList *list, const gchar *tag, guint index, gchar **value); gboolean gst_tag_list_get_pointer (const GstTagList *list, const gchar *tag, gpointer *value); gboolean gst_tag_list_get_pointer_index (const GstTagList *list, const gchar *tag, guint index, gpointer *value); gboolean gst_tag_list_get_date (const GstTagList *list, const gchar *tag, GDate **value); gboolean gst_tag_list_get_date_index (const GstTagList *list, const gchar *tag, guint index, GDate **value);
List of tags and values used to describe media metadata.
Last reviewed on 2005-11-23 (0.9.5)
typedef enum { GST_TAG_MERGE_UNDEFINED, GST_TAG_MERGE_REPLACE_ALL, GST_TAG_MERGE_REPLACE, GST_TAG_MERGE_APPEND, GST_TAG_MERGE_PREPEND, GST_TAG_MERGE_KEEP, GST_TAG_MERGE_KEEP_ALL, /* add more */ GST_TAG_MERGE_COUNT } GstTagMergeMode;
The different tag merging modes.
GST_TAG_MERGE_UNDEFINED
GST_TAG_MERGE_UNDEFINED
undefined merge mode
undefined merge mode
GST_TAG_MERGE_REPLACE_ALL
GST_TAG_MERGE_REPLACE_ALL
replace all tags
replace all tags
GST_TAG_MERGE_REPLACE
GST_TAG_MERGE_REPLACE
replace tags
replace tags
GST_TAG_MERGE_APPEND
GST_TAG_MERGE_APPEND
append tags
append tags
GST_TAG_MERGE_PREPEND
GST_TAG_MERGE_PREPEND
prepend tags
prepend tags
GST_TAG_MERGE_KEEP
GST_TAG_MERGE_KEEP
keep existing tags
keep existing tags
GST_TAG_MERGE_KEEP_ALL
GST_TAG_MERGE_KEEP_ALL
keep all existing tags
keep all existing tags
GST_TAG_MERGE_COUNT
GST_TAG_MERGE_COUNT
the number of merge modes
the number of merge modes
typedef enum { GST_TAG_FLAG_UNDEFINED, GST_TAG_FLAG_META, GST_TAG_FLAG_ENCODED, GST_TAG_FLAG_DECODED, GST_TAG_FLAG_COUNT } GstTagFlag;
Extra tag flags used when registering tags.
GST_TAG_FLAG_UNDEFINED
GST_TAG_FLAG_UNDEFINED
undefined flag
undefined flag
GST_TAG_FLAG_META
GST_TAG_FLAG_META
tag is meta data
tag is meta data
GST_TAG_FLAG_ENCODED
GST_TAG_FLAG_ENCODED
tag is encoded
tag is encoded
GST_TAG_FLAG_DECODED
GST_TAG_FLAG_DECODED
tag is decoded
tag is decoded
GST_TAG_FLAG_COUNT
GST_TAG_FLAG_COUNT
number of tag flags
number of tag flags
GST_TAG_FLAG_UNDEFINED |
undefined flag |
GST_TAG_FLAG_META |
tag is meta data |
GST_TAG_FLAG_ENCODED |
tag is encoded |
GST_TAG_FLAG_DECODED |
tag is decoded |
GST_TAG_FLAG_COUNT |
number of tag flags |
void (*GstTagForeachFunc) (const GstTagList *list, const gchar *tag, gpointer user_data);
A function that will be called in gst_tag_list_foreach()
. The function may
not modify the tag list.
list
:list
the GstTagList
the GstTagList
GstTagListGstTagListtag
:tag
a name of a tag in list
a name of a tag in list
list
user_data
:user_data
user data
user data
list : |
the GstTagList |
tag : |
a name of a tag in list
|
user_data : |
user data |
void (*GstTagMergeFunc) (GValue *dest, const GValue *src);
A function for merging multiple values of a tag used when registering tags.
dest
:dest
the destination GValue
the destination GValue
GValueGValuesrc
:src
the source GValue
the source GValue
GValueGValue
dest : |
the destination GValue |
src : |
the source GValue |
#define GST_TAG_EXTENDED_COMMENT "extended-comment"
key/value text commenting the data (string)
Must be in the form of 'key=comment' or 'key[lc]=comment' where 'lc' is an ISO-639 language code.
This tag is used for unknown Vorbis comment tags, unknown APE tags and certain ID3v2 comment fields.
Since 0.10.10
#define GST_TAG_TRACK_NUMBER "track-number"
track number inside a collection (unsigned integer)
#define GST_TAG_TRACK_COUNT "track-count"
count of tracks inside collection this track belongs to (unsigned integer)
#define GST_TAG_ALBUM_VOLUME_NUMBER "album-disc-number"
disc number inside a collection (unsigned integer)
#define GST_TAG_ALBUM_VOLUME_COUNT "album-disc-count"
count of discs inside collection this disc belongs to (unsigned integer)
#define GST_TAG_DESCRIPTION "description"
short text describing the content of the data (string)
#define GST_TAG_ISRC "isrc"
International Standard Recording Code - see http://www.ifpi.org/isrc/ (string)
#define GST_TAG_DURATION "duration"
length in GStreamer time units (nanoseconds) (unsigned 64-bit integer)
#define GST_TAG_VIDEO_CODEC "video-codec"
codec the video data is stored in (string)
#define GST_TAG_AUDIO_CODEC "audio-codec"
codec the audio data is stored in (string)
#define GST_TAG_BITRATE "bitrate"
exact or average bitrate in bits/s (unsigned integer)
#define GST_TAG_NOMINAL_BITRATE "nominal-bitrate"
nominal bitrate in bits/s (unsigned integer)
#define GST_TAG_MINIMUM_BITRATE "minimum-bitrate"
minimum bitrate in bits/s (unsigned integer)
#define GST_TAG_MAXIMUM_BITRATE "maximum-bitrate"
maximum bitrate in bits/s (unsigned integer)
#define GST_TAG_ENCODER_VERSION "encoder-version"
version of the encoder used to encode this stream (unsigned integer)
#define GST_TAG_LANGUAGE_CODE "language-code"
Language code (ISO-639-1) (string)
#define GST_TAG_IMAGE "image"
image (buffer) (buffer caps should specify the content type)
Since 0.10.6
#define GST_TAG_PREVIEW_IMAGE "preview-image"
image that is meant for preview purposes (buffer) (buffer caps should specify the content type)
Since 0.10.7
void gst_tag_register (const gchar *name, GstTagFlag flag, GType type, const gchar *nick, const gchar *blurb, GstTagMergeFunc func);
Registers a new tag type for the use with GStreamer's type system. If a type with that name is already registered, that one is used. The old registration may have used a different type however. So don't rely on your supplied values.
Important: if you do not supply a merge function the implication will be that there can only be one single value for this tag in a tag list and any additional values will silenty be discarded when being added (unless GST_TAG_MERGE_REPLACE, GST_TAG_MERGE_REPLACE_ALL, or GST_TAG_MERGE_PREPEND is used as merge mode, in which case the new value will replace the old one in the list).
The merge function will be called from gst_tag_list_copy_value()
when
it is required that one or more values for a tag be condensed into
one single value. This may happen from gst_tag_list_get_string()
,
gst_tag_list_get_int()
, gst_tag_list_get_double()
etc. What will happen
exactly in that case depends on how the tag was registered and if a
merge function was supplied and if so which one.
Two default merge functions are provided: gst_tag_merge_use_first()
and
gst_tag_merge_strings_with_commas()
.
name
:name
the name or identifier string
the name or identifier string
flag
:flag
a flag describing the type of tag info
a flag describing the type of tag info
type
:type
the type this data is in
the type this data is in
nick
:nick
human-readable name
human-readable name
blurb
:blurb
a human-readable description about this tag
a human-readable description about this tag
func
:func
function for merging multiple values of this tag, or NULL
function for merging multiple values of this tag, or NULL
name : |
the name or identifier string |
flag : |
a flag describing the type of tag info |
type : |
the type this data is in |
nick : |
human-readable name |
blurb : |
a human-readable description about this tag |
func : |
function for merging multiple values of this tag, or NULL |
void gst_tag_merge_use_first (GValue *dest, const GValue *src);
This is a convenience function for the func argument of gst_tag_register()
.
It creates a copy of the first value from the list.
dest
:dest
uninitialized GValue to store result in
uninitialized GValue to store result in
src
:src
GValue to copy from
GValue to copy from
dest : |
uninitialized GValue to store result in |
src : |
GValue to copy from |
void gst_tag_merge_strings_with_comma (GValue *dest, const GValue *src);
This is a convenience function for the func argument of gst_tag_register()
.
It concatenates all given strings using a comma. The tag must be registered
as a G_TYPE_STRING or this function will fail.
dest
:dest
uninitialized GValue to store result in
uninitialized GValue to store result in
src
:src
GValue to copy from
GValue to copy from
dest : |
uninitialized GValue to store result in |
src : |
GValue to copy from |
gboolean gst_tag_exists (const gchar *tag);
Checks if the given type is already registered.
tag
:tag
name of the tag
name of the tag
Returns :Returns TRUE if the type is already registered
TRUE if the type is already registered
tag : |
name of the tag |
Returns : | TRUE if the type is already registered |
GType gst_tag_get_type (const gchar *tag);
Gets the GType used for this tag.
tag
:tag
the tag
the tag
Returns :Returns the GType of this tag
the GType of this tag
GTypeGType
tag : |
the tag |
Returns : | the GType of this tag |
const gchar* gst_tag_get_nick (const gchar *tag);
Returns the human-readable name of this tag, You must not change or free this string.
tag
:tag
the tag
the tag
Returns :Returns the human-readable name of this tag
the human-readable name of this tag
tag : |
the tag |
Returns : | the human-readable name of this tag |
const gchar* gst_tag_get_description (const gchar *tag);
Returns the human-readable description of this tag, You must not change or free this string.
tag
:tag
the tag
the tag
Returns :Returns the human-readable description of this tag
the human-readable description of this tag
tag : |
the tag |
Returns : | the human-readable description of this tag |
GstTagFlag gst_tag_get_flag (const gchar *tag);
Gets the flag of tag
.
tag
:tag
the tag
the tag
Returns :Returnsthe flag of this tag.
the flag of this tag.
tag : |
the tag |
Returns : | the flag of this tag. |
gboolean gst_tag_is_fixed (const gchar *tag);
Checks if the given tag is fixed. A fixed tag can only contain one value. Unfixed tags can contain lists of values.
tag
:tag
tag to check
tag to check
Returns :Returns TRUE, if the given tag is fixed.
TRUE, if the given tag is fixed.
tag : |
tag to check |
Returns : | TRUE, if the given tag is fixed. |
GstTagList* gst_tag_list_new (void);
Creates a new empty GstTagList.
Returns : | An empty tag list |
gboolean gst_is_tag_list (gconstpointer p);
Checks if the given pointer is a taglist.
p
:p
Object that might be a taglist
Object that might be a taglist
Returns :Returns TRUE, if the given pointer is a taglist
TRUE, if the given pointer is a taglist
p : |
Object that might be a taglist |
Returns : | TRUE, if the given pointer is a taglist |
gboolean gst_tag_list_is_empty (const GstTagList *list);
Checks if the given taglist is empty.
list
:list
A GstTagList.
A GstTagList.
GstTagListGstTagListReturns :Returns TRUE if the taglist is empty, otherwise FALSE.
TRUE if the taglist is empty, otherwise FALSE.
list : |
A GstTagList. |
Returns : | TRUE if the taglist is empty, otherwise FALSE. |
Since 0.10.11
GstTagList* gst_tag_list_copy (const GstTagList *list);
Copies a given GstTagList.
list
:list
list to copy
list to copy
Returns :Returns copy of the given list
copy of the given list
list : |
list to copy |
Returns : | copy of the given list |
void gst_tag_list_insert (GstTagList *into, const GstTagList *from, GstTagMergeMode mode);
Inserts the tags of the second list into the first list using the given mode.
into
:into
list to merge into
list to merge into
from
:from
list to merge from
list to merge from
mode
:mode
the mode to use
the mode to use
into : |
list to merge into |
from : |
list to merge from |
mode : |
the mode to use |
GstTagList* gst_tag_list_merge (const GstTagList *list1, const GstTagList *list2, GstTagMergeMode mode);
Merges the two given lists into a new list. If one of the lists is NULL, a copy of the other is returned. If both lists are NULL, NULL is returned.
list1
:list1
first list to merge
first list to merge
list2
:list2
second list to merge
second list to merge
mode
:mode
the mode to use
the mode to use
Returns :Returns the new list
the new list
list1 : |
first list to merge |
list2 : |
second list to merge |
mode : |
the mode to use |
Returns : | the new list |
void gst_tag_list_free (GstTagList *list);
Frees the given list and all associated values.
list
:list
the list to free
the list to free
list : |
the list to free |
guint gst_tag_list_get_tag_size (const GstTagList *list, const gchar *tag);
Checks how many value are stored in this tag list for the given tag.
list
:list
a taglist
a taglist
tag
:tag
the tag to query
the tag to query
Returns :Returns The number of tags stored
The number of tags stored
list : |
a taglist |
tag : |
the tag to query |
Returns : | The number of tags stored |
void gst_tag_list_add (GstTagList *list, GstTagMergeMode mode, const gchar *tag, ...);
Sets the values for the given tags using the specified mode.
list
:list
list to set tags in
list to set tags in
mode
:mode
the mode to use
the mode to use
tag
:tag
tag
tag
...
:...
NULL-terminated list of values to set
NULL-terminated list of values to set
list : |
list to set tags in |
mode : |
the mode to use |
tag : |
tag |
... : |
NULL-terminated list of values to set |
void gst_tag_list_add_values (GstTagList *list, GstTagMergeMode mode, const gchar *tag, ...);
Sets the GValues for the given tags using the specified mode.
list
:list
list to set tags in
list to set tags in
mode
:mode
the mode to use
the mode to use
tag
:tag
tag
tag
...
:...
GValues to set
GValues to set
list : |
list to set tags in |
mode : |
the mode to use |
tag : |
tag |
... : |
GValues to set |
void gst_tag_list_add_valist (GstTagList *list, GstTagMergeMode mode, const gchar *tag, va_list var_args);
Sets the values for the given tags using the specified mode.
list
:list
list to set tags in
list to set tags in
mode
:mode
the mode to use
the mode to use
tag
:tag
tag
tag
var_args
:var_args
tag / value pairs to set
tag / value pairs to set
list : |
list to set tags in |
mode : |
the mode to use |
tag : |
tag |
var_args : |
tag / value pairs to set |
void gst_tag_list_add_valist_values (GstTagList *list, GstTagMergeMode mode, const gchar *tag, va_list var_args);
Sets the GValues for the given tags using the specified mode.
list
:list
list to set tags in
list to set tags in
mode
:mode
the mode to use
the mode to use
tag
:tag
tag
tag
var_args
:var_args
tag / GValue pairs to set
tag / GValue pairs to set
list : |
list to set tags in |
mode : |
the mode to use |
tag : |
tag |
var_args : |
tag / GValue pairs to set |
void gst_tag_list_remove_tag (GstTagList *list, const gchar *tag);
Removes the given tag from the taglist.
list
:list
list to remove tag from
list to remove tag from
tag
:tag
tag to remove
tag to remove
list : |
list to remove tag from |
tag : |
tag to remove |
void gst_tag_list_foreach (const GstTagList *list, GstTagForeachFunc func, gpointer user_data);
Calls the given function for each tag inside the tag list. Note that if there is no tag, the function won't be called at all.
list
:list
list to iterate over
list to iterate over
func
:func
function to be called for each tag
function to be called for each tag
user_data
:user_data
user specified data
user specified data
list : |
list to iterate over |
func : |
function to be called for each tag |
user_data : |
user specified data |
const GValue* gst_tag_list_get_value_index (const GstTagList *list, const gchar *tag, guint index);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList
a GstTagList
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
Returns :Returns The GValue for the specified entry or NULL if the tag wasn't
available or the tag doesn't have as many entries
The GValue for the specified entry or NULL if the tag wasn't
available or the tag doesn't have as many entries
list : |
a GstTagList |
tag : |
tag to read out |
index : |
number of entry to read out |
Returns : | The GValue for the specified entry or NULL if the tag wasn't available or the tag doesn't have as many entries |
gboolean gst_tag_list_copy_value (GValue *dest, const GstTagList *list, const gchar *tag);
Copies the contents for the given tag into the value,
merging multiple values into one if multiple values are associated
with the tag.
You must g_value_unset()
the value after use.
dest
:dest
uninitialized GValue to copy into
uninitialized GValue to copy into
GValueGValuelist
:list
list to get the tag from
list to get the tag from
tag
:tag
tag to read out
tag to read out
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
dest : |
uninitialized GValue to copy into |
list : |
list to get the tag from |
tag : |
tag to read out |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_char (const GstTagList *list, const gchar *tag, gchar *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_char_index (const GstTagList *list, const gchar *tag, guint index, gchar *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_uchar (const GstTagList *list, const gchar *tag, guchar *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_uchar_index (const GstTagList *list, const gchar *tag, guint index, guchar *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_boolean (const GstTagList *list, const gchar *tag, gboolean *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_boolean_index (const GstTagList *list, const gchar *tag, guint index, gboolean *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_int (const GstTagList *list, const gchar *tag, gint *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_int_index (const GstTagList *list, const gchar *tag, guint index, gint *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_uint (const GstTagList *list, const gchar *tag, guint *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_uint_index (const GstTagList *list, const gchar *tag, guint index, guint *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_long (const GstTagList *list, const gchar *tag, glong *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_long_index (const GstTagList *list, const gchar *tag, guint index, glong *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_ulong (const GstTagList *list, const gchar *tag, gulong *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_ulong_index (const GstTagList *list, const gchar *tag, guint index, gulong *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_int64 (const GstTagList *list, const gchar *tag, gint64 *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_int64_index (const GstTagList *list, const gchar *tag, guint index, gint64 *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_uint64 (const GstTagList *list, const gchar *tag, guint64 *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_uint64_index (const GstTagList *list, const gchar *tag, guint index, guint64 *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_float (const GstTagList *list, const gchar *tag, gfloat *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_float_index (const GstTagList *list, const gchar *tag, guint index, gfloat *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_double (const GstTagList *list, const gchar *tag, gdouble *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_double_index (const GstTagList *list, const gchar *tag, guint index, gdouble *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_string (const GstTagList *list, const gchar *tag, gchar **value);
Copies the contents for the given tag into the value, possibly merging multiple values into one if multiple values are associated with the tag.
Use gst_tag_list_get_string_index (list, tag, 0, value) if you want to retrieve the first string associated with this tag unmodified.
The resulting string in value
should be freed by the caller using g_free
when no longer needed
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_string_index (const GstTagList *list, const gchar *tag, guint index, gchar **value);
Gets the value that is at the given index for the given tag in the given list.
The resulting string in value
should be freed by the caller using g_free
when no longer needed
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_pointer (const GstTagList *list, const gchar *tag, gpointer *value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_pointer_index (const GstTagList *list, const gchar *tag, guint index, gpointer *value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list.
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list. |
gboolean gst_tag_list_get_date (const GstTagList *list, const gchar *tag, GDate **value);
Copies the contents for the given tag into the value, merging multiple values into one if multiple values are associated with the tag.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list or if it was NULL.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list or if it was NULL.
NULLNULL
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list or if it was NULL. |
gboolean gst_tag_list_get_date_index (const GstTagList *list, const gchar *tag, guint index, GDate **value);
Gets the value that is at the given index for the given tag in the given list.
list
:list
a GstTagList to get the tag from
a GstTagList to get the tag from
GstTagListGstTagListtag
:tag
tag to read out
tag to read out
index
:index
number of entry to read out
number of entry to read out
value
:value
location for the result
location for the result
Returns :Returns TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list or if it was NULL.
TRUE, if a value was copied, FALSE if the tag didn't exist in the
given list or if it was NULL.
NULLNULL
list : |
a GstTagList to get the tag from |
tag : |
tag to read out |
index : |
number of entry to read out |
value : |
location for the result |
Returns : | TRUE, if a value was copied, FALSE if the tag didn't exist in the given list or if it was NULL. |