mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2025-02-06 22:42:35 +00:00
Code Issues 1 Projects Releases Wiki Activity

docs/design/part-messages.txt: update info

Browse source 
Original commit message from CVS:
* docs/design/part-messages.txt:
update info
* docs/gst/tmpl/.cvsignore:
* docs/gst/tmpl/gstcaps.sgml:
* docs/gst/tmpl/gstclock.sgml:
* gst/gstbus.c:
* gst/gstcaps.c:
* gst/gstcaps.h:
* gst/gstclock.c:
* gst/gstclock.h:
* gst/gstmessage.c:
added descriptions for bus and message
inline caps and clock docs
This commit is contained in:
Stefan Kost 2005-08-27 10:57:00 +00:00
parent 6aa69df224
commit c73b03243a
11 changed files with 333 additions and 902 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
ChangeLog
View file

@ -1,3 +1,19 @@
2005-08-27 Stefan Kost <ensonic@users.sf.net>
* docs/design/part-messages.txt:
update info
* docs/gst/tmpl/.cvsignore:
* docs/gst/tmpl/gstcaps.sgml:
* docs/gst/tmpl/gstclock.sgml:
* gst/gstbus.c:
* gst/gstcaps.c:
* gst/gstcaps.h:
* gst/gstclock.c:
* gst/gstclock.h:
* gst/gstmessage.c:
added descriptions for bus and message
inline caps and clock docs
2005-08-27 Stefan Kost <ensonic@users.sf.net>
* gst/gstmessage.c:

2
docs/design/part-messages.txt
View file

@ -4,7 +4,7 @@ Messages
Messages are refcounted lightweight objects to signal the application
of pipeline events.
Messages are implemented as a subclass of GstData with a generic
Messages are implemented as a subclass of GstMiniObject with a generic
GstStructure as the content. This allows for writing custom messages without
requiring an API change while allowing a wide range of different types
of messages.

2
docs/gst/tmpl/.gitignore vendored
View file

@ -8,7 +8,9 @@ gstbasetransform.sgml
gstbin.sgml
gstbuffer.sgml
gstbus.sgml
gstcaps.sgml
gstcheck.sgml
gstclock.sgml
gstcollectpads.sgml
gstevent.sgml
gstfakesrc.sgml

464
docs/gst/tmpl/gstcaps.sgml
View file

@ -1,464 +0,0 @@
<!-- ##### SECTION Title ##### -->
GstCaps
<!-- ##### SECTION Short_Description ##### -->
Structure describing sets of media formats
<!-- ##### SECTION Long_Description ##### -->
<para>
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
</para>
<!-- ##### SECTION Stability_Level ##### -->
<!-- ##### STRUCT GstCaps ##### -->
<para>
</para>
@type:
@refcount:
@flags:
@structs:
<!-- ##### STRUCT GstStaticCaps ##### -->
<para>
</para>
@caps:
@string:
<!-- ##### MACRO GST_CAPS_FLAGS_ANY ##### -->
<para>
Flags that this caps has no specific content, but can contain anything.
</para>
<!-- ##### MACRO GST_CAPS_ANY ##### -->
<para>
Means that the element/pad can output 'anything'. Useful for elements
that output unknown media, such as filesrc.
</para>
<!-- ##### MACRO GST_CAPS_NONE ##### -->
<para>
The opposite of GST_CAPS_ANY: it means that the pad/element outputs an
undefined media type that can not be detected.
</para>
<!-- ##### MACRO GST_CAPS_REFCOUNT ##### -->
<para>
</para>
@caps:
<!-- ##### MACRO GST_CAPS_REFCOUNT_VALUE ##### -->
<para>
</para>
@caps:
<!-- ##### MACRO GST_STATIC_CAPS_ANY ##### -->
<para>
Creates a static caps that matches anything. This can be used in pad
templates.
</para>
@Returns: a new #GstCaps instance
<!-- ##### MACRO GST_STATIC_CAPS_NONE ##### -->
<para>
Creates a static caps that matches nothing. This can be used in pad
templates.
</para>
@Returns: a new #GstCaps instance
<!-- ##### MACRO GST_CAPS_IS_SIMPLE ##### -->
<para>
Convinience macro that checks if the number of structures in the gives caps is
exactly one.
</para>
@caps: the #GstCaps instance to check
<!-- ##### MACRO GST_DEBUG_CAPS ##### -->
<para>
Convinience macro for prining out the contents of caps with GST_DEBUG().
</para>
@string: a string the should be prepend to the caps data.
@caps: the caps to print
<!-- ##### MACRO GST_STATIC_CAPS ##### -->
<para>
Creates a static caps from an input string. This can be used in pad
templates.
</para>
@string: the string describing the caps.
@Returns: a new #GstCaps instance
<!-- ##### FUNCTION gst_caps_new_empty ##### -->
<para>
</para>
@Returns:
<!-- ##### FUNCTION gst_caps_new_any ##### -->
<para>
</para>
@Returns:
<!-- ##### FUNCTION gst_caps_new_simple ##### -->
<para>
</para>
@media_type:
@fieldname:
@Varargs:
@Returns:
<!-- ##### FUNCTION gst_caps_new_full ##### -->
<para>
</para>
@struct1:
@Varargs:
@Returns:
<!-- ##### FUNCTION gst_caps_new_full_valist ##### -->
<para>
</para>
@structure:
@var_args:
@Returns:
<!-- ##### FUNCTION gst_caps_copy ##### -->
<para>
</para>
@caps:
@Returns:
<!-- ##### FUNCTION gst_caps_copy_nth ##### -->
<para>
</para>
@caps:
@nth:
@Returns:
<!-- ##### FUNCTION gst_static_caps_get ##### -->
<para>
</para>
@static_caps:
@Returns:
<!-- # Unused Parameters # -->
@caps:
<!-- ##### FUNCTION gst_caps_append ##### -->
<para>
</para>
@caps1:
@caps2:
<!-- ##### FUNCTION gst_caps_append_structure ##### -->
<para>
</para>
@caps:
@structure:
<!-- # Unused Parameters # -->
@caps1:
<!-- ##### FUNCTION gst_caps_get_size ##### -->
<para>
</para>
@caps:
@Returns:
<!-- ##### FUNCTION gst_caps_get_structure ##### -->
<para>
</para>
@caps:
@index:
@Returns:
<!-- ##### FUNCTION gst_caps_set_simple ##### -->
<para>
</para>
@caps:
@field:
@Varargs:
<!-- ##### FUNCTION gst_caps_set_simple_valist ##### -->
<para>
</para>
@caps:
@field:
@varargs:
<!-- ##### FUNCTION gst_caps_is_any ##### -->
<para>
</para>
@caps:
@Returns:
<!-- ##### FUNCTION gst_caps_is_empty ##### -->
<para>
</para>
@caps:
@Returns:
<!-- ##### FUNCTION gst_caps_is_fixed ##### -->
<para>
</para>
@caps:
@Returns:
<!-- ##### FUNCTION gst_caps_is_equal ##### -->
<para>
</para>
@caps1:
@caps2:
@Returns:
<!-- ##### FUNCTION gst_caps_is_equal_fixed ##### -->
<para>
</para>
@caps1:
@caps2:
@Returns:
<!-- ##### FUNCTION gst_caps_is_always_compatible ##### -->
<para>
</para>
@caps1:
@caps2:
@Returns:
<!-- ##### FUNCTION gst_caps_is_subset ##### -->
<para>
</para>
@subset:
@superset:
@Returns:
<!-- ##### FUNCTION gst_caps_intersect ##### -->
<para>
</para>
@caps1:
@caps2:
@Returns:
<!-- ##### FUNCTION gst_caps_union ##### -->
<para>
</para>
@caps1:
@caps2:
@Returns:
<!-- ##### FUNCTION gst_caps_normalize ##### -->
<para>
</para>
@caps:
@Returns:
<!-- ##### FUNCTION gst_caps_do_simplify ##### -->
<para>
</para>
@caps:
@Returns:
<!-- ##### FUNCTION gst_caps_save_thyself ##### -->
<para>
</para>
@caps:
@parent:
@Returns:
<!-- ##### FUNCTION gst_caps_load_thyself ##### -->
<para>
</para>
@parent:
@Returns:
<!-- ##### FUNCTION gst_caps_replace ##### -->
<para>
</para>
@caps:
@newcaps:
<!-- ##### FUNCTION gst_caps_to_string ##### -->
<para>
</para>
@caps:
@Returns:
<!-- ##### FUNCTION gst_caps_from_string ##### -->
<para>
</para>
@string:
@Returns:
<!-- ##### FUNCTION gst_caps_subtract ##### -->
<para>
</para>
@minuend:
@subtrahend:
@Returns:
<!-- ##### FUNCTION gst_caps_make_writable ##### -->
<para>
</para>
@caps:
@Returns:
<!-- ##### FUNCTION gst_caps_ref ##### -->
<para>
</para>
@caps:
@Returns:
<!-- ##### FUNCTION gst_caps_structure_fixate_field_boolean ##### -->
<para>
</para>
@structure:
@field_name:
@target:
@Returns:
<!-- ##### FUNCTION gst_caps_truncate ##### -->
<para>
</para>
@caps:
<!-- ##### FUNCTION gst_caps_unref ##### -->
<para>
</para>
@caps:

432
docs/gst/tmpl/gstclock.sgml
View file

@ -1,432 +0,0 @@
<!-- ##### SECTION Title ##### -->
GstClock
<!-- ##### SECTION Short_Description ##### -->
Abstract class for global clocks
<!-- ##### SECTION Long_Description ##### -->
<para>
GStreamer uses a global clock to synchronise the plugins in a pipeline.
Different clock implementations are possible by implementing this abstract
base class.
</para>
<para>
The clock time is always measured in nanoseconds and always increases. The
pipeline uses the clock to calculate the stream time.
Usually all renderers sync to the global clock so that the clock is always
a good measure of the current playback time in the pipeline.
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
#GstSystemClock
</para>
<!-- ##### SECTION Stability_Level ##### -->
<!-- ##### STRUCT GstClock ##### -->
<para>
</para>
@flags:
<!-- ##### ARG GstClock:stats ##### -->
<para>
Boolean property to activate stat generation on the clock.
</para>
<!-- ##### TYPEDEF GstClockTime ##### -->
<para>
A datatype to hold a time, measured in nanoseconds.
</para>
<!-- ##### TYPEDEF GstClockTimeDiff ##### -->
<para>
A datatype to hold a timedifference, measured in nanoseconds.
</para>
<!-- ##### TYPEDEF GstClockID ##### -->
<para>
A detatype to hold the handle to an outstanding async clock callback
</para>
<!-- ##### MACRO GST_CLOCK_TIME_NONE ##### -->
<para>
Constant to define an undefined clock time
</para>
<!-- ##### MACRO GST_CLOCK_TIME_IS_VALID ##### -->
<para>
</para>
@time:
<!-- ##### MACRO GST_SECOND ##### -->
<para>
Constant that defines one GStreamer second
</para>
<!-- ##### MACRO GST_MSECOND ##### -->
<para>
Constant that defines one GStreamer millisecond
</para>
<!-- ##### MACRO GST_USECOND ##### -->
<para>
Constant that defines one GStreamer microsecond
</para>
<!-- ##### MACRO GST_NSECOND ##### -->
<para>
Constant that defines one GStreamer nanosecond
</para>
<!-- ##### MACRO GST_CLOCK_DIFF ##### -->
<para>
Calculate a difference between to clock times.
</para>
@s: the first time
@e: the second time
<!-- ##### MACRO GST_TIMEVAL_TO_TIME ##### -->
<para>
Convert a GTimeVal to a GstClockTime
</para>
@tv: the timeval to convert
<!-- ##### MACRO GST_TIME_TO_TIMEVAL ##### -->
<para>
Convert a GstClockTime to a GTimeVal
</para>
@t: The GstClockTime to convert
@tv: The target timeval
<!-- ##### MACRO GST_TIMESPEC_TO_TIME ##### -->
<para>
</para>
@ts:
<!-- ##### MACRO GST_TIME_TO_TIMESPEC ##### -->
<para>
</para>
@t:
@ts:
<!-- ##### MACRO GST_CLOCK_ENTRY_TRACE_NAME ##### -->
<para>
The name used for tracing clock entry allocations.
</para>
<!-- ##### STRUCT GstClockEntry ##### -->
<para>
All pending timeouts or periodic notifies are converted into
an entry.
</para>
@refcount:
<!-- ##### USER_FUNCTION GstClockCallback ##### -->
<para>
The function prototype of the callback.
</para>
@clock: The clock that triggered the callback
@time: The time it was triggered
@id: The id that expired
@user_data: user data passed in the async_wait call
@Returns: %TRUE or %FALSE (currently unused)
<!-- ##### ENUM GstClockEntryType ##### -->
<para>
The type of the clock entry
</para>
@GST_CLOCK_ENTRY_SINGLE: a single shot timeout
@GST_CLOCK_ENTRY_PERIODIC: a periodic timeout request
<!-- ##### MACRO GST_CLOCK_ENTRY ##### -->
<para>
Cast to a clock entry
</para>
@entry: the entry to cast
<!-- ##### MACRO GST_CLOCK_ENTRY_CLOCK ##### -->
<para>
Get the owner clock of the entry
</para>
@entry: the entry to query
<!-- ##### MACRO GST_CLOCK_ENTRY_TYPE ##### -->
<para>
Get the type of the clock entry
</para>
@entry: the entry to query
<!-- ##### MACRO GST_CLOCK_ENTRY_TIME ##### -->
<para>
Get the requested time of this entry
</para>
@entry: the entry to query
<!-- ##### MACRO GST_CLOCK_ENTRY_INTERVAL ##### -->
<para>
Get the interval of this periodic entry
</para>
@entry: the entry to query
<!-- ##### MACRO GST_CLOCK_ENTRY_STATUS ##### -->
<para>
The status of the entry
</para>
@entry: the entry to query
<!-- ##### ENUM GstClockReturn ##### -->
<para>
The return value of a clock operation.
</para>
@GST_CLOCK_OK: The operation succeded.
@GST_CLOCK_EARLY: The operation was scheduled too late.
@GST_CLOCK_UNSCHEDULED: The clockID was unscheduled
@GST_CLOCK_BUSY: The ClockID is busy
@GST_CLOCK_BADTIME: A bad time was provided to a function.
@GST_CLOCK_ERROR: An error occured
@GST_CLOCK_UNSUPPORTED: Operation is not supported
<!-- ##### ENUM GstClockFlags ##### -->
<para>
The capabilities of this clock
</para>
@GST_CLOCK_FLAG_CAN_DO_SINGLE_SYNC: This clock can do a single sync timeut request
@GST_CLOCK_FLAG_CAN_DO_SINGLE_ASYNC: This clock can do a single async timeout request
@GST_CLOCK_FLAG_CAN_DO_PERIODIC_SYNC: This clock can do sync periodic timeout requests
@GST_CLOCK_FLAG_CAN_DO_PERIODIC_ASYNC: This clock can do async periodic timeout callbacks
@GST_CLOCK_FLAG_CAN_SET_RESOLUTION: The resolution of this clock can be changed
<!-- ##### MACRO GST_CLOCK_FLAGS ##### -->
<para>
Get the clock flags
</para>
@clock: the clock to query
<!-- ##### MACRO GST_CLOCK_BROADCAST ##### -->
<para>
</para>
@clock:
<!-- ##### MACRO GST_CLOCK_CAST ##### -->
<para>
</para>
@clock:
<!-- ##### MACRO GST_CLOCK_COND ##### -->
<para>
</para>
@clock:
<!-- ##### MACRO GST_CLOCK_TIMED_WAIT ##### -->
<para>
</para>
@clock:
@tv:
<!-- ##### MACRO GST_CLOCK_WAIT ##### -->
<para>
</para>
@clock:
<!-- ##### FUNCTION gst_clock_set_resolution ##### -->
<para>
</para>
@clock:
@resolution:
@Returns:
<!-- ##### FUNCTION gst_clock_get_resolution ##### -->
<para>
</para>
@clock:
@Returns:
<!-- ##### FUNCTION gst_clock_get_time ##### -->
<para>
</para>
@clock:
@Returns:
<!-- ##### FUNCTION gst_clock_new_single_shot_id ##### -->
<para>
</para>
@clock:
@time:
@Returns:
<!-- ##### FUNCTION gst_clock_new_periodic_id ##### -->
<para>
</para>
@clock:
@start_time:
@interval:
@Returns:
<!-- ##### FUNCTION gst_clock_adjust_unlocked ##### -->
<para>
</para>
@clock:
@internal:
@Returns:
<!-- ##### FUNCTION gst_clock_set_time_adjust ##### -->
<para>
</para>
@clock:
@adjust:
<!-- ##### FUNCTION gst_clock_id_get_time ##### -->
<para>
</para>
@id:
@Returns:
<!-- ##### FUNCTION gst_clock_id_wait ##### -->
<para>
</para>
@id:
@jitter:
@Returns:
<!-- ##### FUNCTION gst_clock_id_wait_async ##### -->
<para>
</para>
@id:
@func:
@user_data:
@Returns:
<!-- ##### FUNCTION gst_clock_id_unschedule ##### -->
<para>
</para>
@id:
<!-- ##### FUNCTION gst_clock_id_compare_func ##### -->
<para>
</para>
@id1:
@id2:
@Returns:
<!-- ##### FUNCTION gst_clock_id_ref ##### -->
<para>
</para>
@id:
@Returns:
<!-- ##### FUNCTION gst_clock_id_unref ##### -->
<para>
</para>
@id:

32
gst/gstbus.c
View file

@ -21,6 +21,38 @@
/**
* SECTION:gstbus
* @short_description: Asynchronous message bus subsystem
* @see_also: #GstMessage, #GstElement
*
* The #GstBus is an object responsible for delivering #GstMessages in
* a first-in first-out way from the streaming threads to the application.
*
* Since the application typically only wants to deal with delivery of these
* messages from one thread, the GstBus will marshall the messages between
* different threads. This is important since the actual streaming of media
* is done in another thread than the application.
*
* The GstBus provides support for #GSource based notifications. This makes it
* possible to handle the delivery in the glib mainloop.
*
* A message is posted on the bus with the gst_bus_post() method. With the
* gst_bus_peek() and _pop() methods one can look at or retrieve a previously
* posted message.
*
* The bus can be polled with the gst_bus_poll() method. This methods blocks
* up to the specified timeout value until one of the specified messages types
* is posted on the bus. The application can then _pop() the messages from the
* bus to handle them.
* Alternatively the application can register an asynchronous bus handler using
* gst_bus_add_watch_full() orgst_bus_add_watch(). This handler will receive
* messages a short while after they have been posted.
*
* It is also possible to get messages from the bus without any thread
* marshalling with the gst_bus_set_sync_handler() method. This makes it
* possible to react to a message in the same thread that posted the
* message on the bus. This should only be used if the application is able
* to deal with messages from different threads.
*
* Every #GstElement has its own bus.
*/
#include <errno.h>

6
gst/gstcaps.c
View file

@ -16,6 +16,12 @@
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:gstcaps
* @short_description: Structure describing sets of media formats
* @see_also: #GstStructure
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"

60
gst/gstcaps.h
View file

@ -29,21 +29,81 @@ G_BEGIN_DECLS
#define GST_CAPS(object) ((GstCaps*)object)
#define GST_IS_CAPS(object) ((object) && (GST_CAPS(object)->type == GST_TYPE_CAPS))
/**
* GST_CAPS_FLAGS_ANY:
*
* Flags that this caps has no specific content, but can contain anything.
*/
#define GST_CAPS_FLAGS_ANY (1 << 0)
/**
* GST_CAPS_ANY:
*
* Means that the element/pad can output 'anything'. Useful for elements
* that output unknown media, such as filesrc.
*/
#define GST_CAPS_ANY gst_caps_new_any()
/**
* GST_CAPS_NONE:
*
* The opposite of %GST_CAPS_ANY: it means that the pad/element outputs an
* undefined media type that can not be detected.
*/
#define GST_CAPS_NONE gst_caps_new_empty()
/**
* GST_STATIC_CAPS_ANY:
*
* Creates a static caps that matches anything. This can be used in pad
* templates.
*
* Returns: a new #GstCaps instance
*/
#define GST_STATIC_CAPS_ANY GST_STATIC_CAPS("ANY")
/**
* GST_STATIC_CAPS_NONE:
*
* Creates a static caps that matches nothing. This can be used in pad
* templates.
*
* Returns: a new #GstCaps instance
*/
#define GST_STATIC_CAPS_NONE GST_STATIC_CAPS("NONE")
/**
* GST_CAPS_IS_SIMPLE:
* @caps: the #GstCaps instance to check
*
* Convinience macro that checks if the number of structures in the gives caps
* is exactly one.
*
* Returns: %TRUE if caps has exactly one structure
*/
#define GST_CAPS_IS_SIMPLE(caps) (gst_caps_get_size(caps) == 1)
#ifndef GST_DISABLE_DEPRECATED
/**
* GST_DEBUG_CAPS:
* @string: a string the should be prepend to the caps data.
* @caps: the #GstCaps instance to print
*
* Convinience macro for prining out the contents of caps with GST_DEBUG().
*
* Deprecated: do not use anymore
*/
#define GST_DEBUG_CAPS(string, caps) \
GST_DEBUG ( string "%s: " GST_PTR_FORMAT, caps)
#endif
/**
* GST_STATIC_CAPS:
* @caps: the string describing the caps.
*
* Creates a static caps from an input string. This can be used in pad
* templates.
*
* Returns: a new #GstCaps instance
*/
#define GST_STATIC_CAPS(string) \
{ \
/* caps */ { 0 }, \

15
gst/gstclock.c
View file

@ -20,7 +20,20 @@
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:gstclock
* @short_description: Abstract class for global clocks
* @see_also: #GstSystemClock
*
* GStreamer uses a global clock to synchronise the plugins in a pipeline.
* Different clock implementations are possible by implementing this abstract
* base class.
*
* The clock time is always measured in nanoseconds and always increases. The
* pipeline uses the clock to calculate the stream time.
* Usually all renderers sync to the global clock so that the clock is always
* a good measure of the current playback time in the pipeline.
*/
#include <time.h>
#include "gst_private.h"

193
gst/gstclock.h
View file

@ -35,28 +35,116 @@ G_BEGIN_DECLS
#define GST_IS_CLOCK_CLASS(cclass) (G_TYPE_CHECK_CLASS_TYPE ((cclass), GST_TYPE_CLOCK))
#define GST_CLOCK_GET_CLASS(clock) (G_TYPE_INSTANCE_GET_CLASS ((clock), GST_TYPE_CLOCK, GstClockClass))
#define GST_CLOCK_CAST(clock) ((GstClock*)(clock))
/**
* GstClockTime:
*
* A datatype to hold a time, measured in nanoseconds.
*/
typedef guint64 GstClockTime;
/**
* GstClockTimeDiff:
*
* A datatype to hold a timedifference, measured in nanoseconds.
*/
typedef gint64 GstClockTimeDiff;
/**
* GstClockID:
*
* A detatype to hold the handle to an outstanding async clock callback
*/
typedef gpointer GstClockID;
/**
* GST_CLOCK_TIME_NONE:
*
* Constant to define an undefined clock time
*/
#define GST_CLOCK_TIME_NONE ((GstClockTime)-1)
/**
* GST_CLOCK_TIME_IS_VALID:
* @time: clock time to validate
*
* Tests if a clock-time is defined.
*
* Returns: %TRUE if clocktime is safe to use.
*/
#define GST_CLOCK_TIME_IS_VALID(time) ((time) != GST_CLOCK_TIME_NONE)
/**
* GST_SECOND:
*
* Constant that defines one GStreamer second
*/
#define GST_SECOND (G_USEC_PER_SEC * G_GINT64_CONSTANT (1000))
/**
* GST_MSECOND:
*
* Constant that defines one GStreamer millisecond
*/
#define GST_MSECOND (GST_SECOND / G_GINT64_CONSTANT (1000))
/**
* GST_USECOND:
*
* Constant that defines one GStreamer microsecond
*/
#define GST_USECOND (GST_SECOND / G_GINT64_CONSTANT (1000000))
/**
* GST_NSECOND:
*
* Constant that defines one GStreamer nanosecond
*/
#define GST_NSECOND (GST_SECOND / G_GINT64_CONSTANT (1000000000))
/**
* GST_CLOCK_DIFF:
* @s: the first time
* @e: the second time
*
* Calculate a difference between two clock times.
*
* Returns: the difference as #GstClockTimeDiff
*/
#define GST_CLOCK_DIFF(s, e) (GstClockTimeDiff)((s) - (e))
/**
* GST_TIMEVAL_TO_TIME:
* @tv: the timeval to convert
*
* Convert a GTimeVal to a GstClockTime
*
* Returns: the result as #GstClockTime
*/
#define GST_TIMEVAL_TO_TIME(tv) ((tv).tv_sec * GST_SECOND + (tv).tv_usec * GST_USECOND)
/**
* GST_TIME_TO_TIMEVAL:
* @t: The GstClockTime to convert
* @tv: The target timeval
*
* Convert a GstClockTime to a GTimeVal
*/
#define GST_TIME_TO_TIMEVAL(t,tv) \
G_STMT_START { \
(tv).tv_sec = (t) / GST_SECOND; \
(tv).tv_usec = ((t) - (tv).tv_sec * GST_SECOND) / GST_USECOND; \
} G_STMT_END
/**
* GST_TIMESPEC_TO_TIME:
* @ts: the timespec to convert
*
* Convert a GstTimeSpec to a GstClockTime
*
* Returns: the result as #GstClockTime
*/
#define GST_TIMESPEC_TO_TIME(ts) ((ts).tv_sec * GST_SECOND + (ts).tv_nsec * GST_NSECOND)
/**
* GST_TIME_TO_TIMESPEC:
* @t: The GstClockTime to convert
* @ts: The target timespec
*
* Convert a GstClockTime to a GstTimeSpec
*/
#define GST_TIME_TO_TIMESPEC(t,ts) \
G_STMT_START { \
(ts).tv_sec = (t) / GST_SECOND; \
@ -71,6 +159,11 @@ G_STMT_START { \
(guint) ((((GstClockTime)(t)) / GST_SECOND) % 60), \
(guint) (((GstClockTime)(t)) % GST_SECOND)
/**
* GST_CLOCK_ENTRY_TRACE_NAME:
*
* The name used for tracing clock entry allocations.
*/
#define GST_CLOCK_ENTRY_TRACE_NAME "GstClockEntry"
typedef struct _GstClockEntry GstClockEntry;
@ -78,9 +171,31 @@ typedef struct _GstClock GstClock;
typedef struct _GstClockClass GstClockClass;
/* --- prototype for async callbacks --- */
/**
* GstClockCallback:
* @clock: The clock that triggered the callback
* @time: The time it was triggered
* @id: The #GstClockID that expired
* @user_data: user data passed in the async_wait call
*
* The function prototype of the callback.
*
* Returns: %TRUE or %FALSE (currently unused)
*/
typedef gboolean (*GstClockCallback) (GstClock *clock, GstClockTime time,
GstClockID id, gpointer user_data);
/**
* GstClockReturn:
* @GST_CLOCK_OK: The operation succeded.
* @GST_CLOCK_EARLY: The operation was scheduled too late.
* @GST_CLOCK_UNSCHEDULED: The clockID was unscheduled
* @GST_CLOCK_BUSY: The ClockID is busy
* @GST_CLOCK_BADTIME: A bad time was provided to a function.
* @GST_CLOCK_ERROR: An error occured
* @GST_CLOCK_UNSUPPORTED: Operation is not supported
*
* The return value of a clock operation.
*/
typedef enum
{
GST_CLOCK_OK = 0,
@ -92,18 +207,68 @@ typedef enum
GST_CLOCK_UNSUPPORTED = 6,
} GstClockReturn;
/**
* GstClockEntryType:
* @GST_CLOCK_ENTRY_SINGLE: a single shot timeout
* @GST_CLOCK_ENTRY_PERIODIC: a periodic timeout request
*
* The type of the clock entry
*/
typedef enum {
GST_CLOCK_ENTRY_SINGLE,
GST_CLOCK_ENTRY_PERIODIC
} GstClockEntryType;
/**
* GST_CLOCK_ENTRY:
* @entry: the entry to cast
*
* Cast to a clock entry
*/
#define GST_CLOCK_ENTRY(entry) ((GstClockEntry *)(entry))
/**
* GST_CLOCK_ENTRY_CLOCK:
* @entry: the entry to query
*
* Get the owner clock of the entry
*/
#define GST_CLOCK_ENTRY_CLOCK(entry) ((entry)->clock)
/**
* GST_CLOCK_ENTRY_TYPE:
* @entry: the entry to query
*
* Get the type of the clock entry
*/
#define GST_CLOCK_ENTRY_TYPE(entry) ((entry)->type)
/**
* GST_CLOCK_ENTRY_TIME:
* @entry: the entry to query
*
* Get the requested time of this entry
*/
#define GST_CLOCK_ENTRY_TIME(entry) ((entry)->time)
/**
* GST_CLOCK_ENTRY_INTERVAL:
* @entry: the entry to query
*
* Get the interval of this periodic entry
*/
#define GST_CLOCK_ENTRY_INTERVAL(entry) ((entry)->interval)
/**
* GST_CLOCK_ENTRY_STATUS:
* @entry: the entry to query
*
* The status of the entry
*/
#define GST_CLOCK_ENTRY_STATUS(entry) ((entry)->status)
/**
* GstClockEntry:
* @refcount: reference counter (read-only)
*
* All pending timeouts or periodic notifies are converted into
* an entry.
*/
struct _GstClockEntry {
gint refcount;
/*< protected >*/
@ -116,8 +281,17 @@ struct _GstClockEntry {
gpointer user_data;
};
typedef enum
{
/**
* GstClockFlags:
* @GST_CLOCK_FLAG_CAN_DO_SINGLE_SYNC: This clock can do a single sync timeut request
* @GST_CLOCK_FLAG_CAN_DO_SINGLE_ASYNC: This clock can do a single async timeout request
* @GST_CLOCK_FLAG_CAN_DO_PERIODIC_SYNC: This clock can do sync periodic timeout requests
* @GST_CLOCK_FLAG_CAN_DO_PERIODIC_ASYNC: This clock can do async periodic timeout callbacks
* @GST_CLOCK_FLAG_CAN_SET_RESOLUTION: The resolution of this clock can be changed
*
* The capabilities of this clock
*/
typedef enum {
GST_CLOCK_FLAG_CAN_DO_SINGLE_SYNC = (1 << 1),
GST_CLOCK_FLAG_CAN_DO_SINGLE_ASYNC = (1 << 2),
GST_CLOCK_FLAG_CAN_DO_PERIODIC_SYNC = (1 << 3),
@ -125,6 +299,12 @@ typedef enum
GST_CLOCK_FLAG_CAN_SET_RESOLUTION = (1 << 5),
} GstClockFlags;
/**
* GST_CLOCK_FLAGS:
* @entry: the entry to query
*
* Get the clock flags
*/
#define GST_CLOCK_FLAGS(clock) (GST_CLOCK(clock)->flags)
#define GST_CLOCK_COND(clock) (GST_CLOCK_CAST(clock)->entries_changed)
@ -132,6 +312,11 @@ typedef enum
#define GST_CLOCK_TIMED_WAIT(clock,tv) g_cond_timed_wait(GST_CLOCK_COND(clock),GST_GET_LOCK(clock),tv)
#define GST_CLOCK_BROADCAST(clock) g_cond_broadcast(GST_CLOCK_COND(clock))
/**
* GstClock:
* @stats: Boolean property to activate stat generation on the clock.
*
*/
struct _GstClock {
GstObject object;

13
gst/gstmessage.c
View file

@ -18,6 +18,19 @@
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:gstmessage
* @short_description: Lightweight objects to signal the application of pipeline events
* @see_also: #GstBus,#GstMiniObject
*
* Messages are implemented as a subclass of #GstMiniObject with a generic
* #GstStructure as the content. This allows for writing custom messages without
* requiring an API change while allowing a wide range of different types
* of messages.
*
* Messages are posted by objects in the pipeline and are passed to the
* application using the #GstBus.
*/
#include <string.h> /* memcpy */