/* GStreamer

 * Copyright (C) 2004 Wim Taymans <wim@fluendo.com>

 *

 * gstmessage.h: Header for GstMessage subsystem

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#ifndef __GST_MESSAGE_H__

#define __GST_MESSAGE_H__

#include <glib.h>

G_BEGIN_DECLS

typedef struct _GstMessage GstMessage;

/**

 * GstMessageType:

 * @GST_MESSAGE_UNKNOWN: an undefined message

 * @GST_MESSAGE_EOS: end-of-stream reached in a pipeline. The application will

 * only receive this message in the PLAYING state and every time it sets a

 * pipeline to PLAYING that is in the EOS state. The application can perform a

 * flushing seek in the pipeline, which will undo the EOS state again.

 * @GST_MESSAGE_ERROR: an error occurred. When the application receives an error

 * message it should stop playback of the pipeline and not assume that more

 * data will be played.

 * @GST_MESSAGE_WARNING: a warning occurred.

 * @GST_MESSAGE_INFO: an info message occurred

 * @GST_MESSAGE_TAG: a tag was found.

 * @GST_MESSAGE_BUFFERING: the pipeline is buffering. When the application

 * receives a buffering message in the PLAYING state for a non-live pipeline it

 * must PAUSE the pipeline until the buffering completes, when the percentage

 * field in the message is 100%. For live pipelines, no action must be

 * performed and the buffering percentage can be used to inform the user about

 * the progress.

 * @GST_MESSAGE_STATE_CHANGED: a state change happened

 * @GST_MESSAGE_STATE_DIRTY: an element changed state in a streaming thread.

 * This message is deprecated.

 * @GST_MESSAGE_STEP_DONE: a stepping operation finished.

 * @GST_MESSAGE_CLOCK_PROVIDE: an element notifies its capability of providing

 *                             a clock. This message is used internally and

 *                             never forwarded to the application.

 * @GST_MESSAGE_CLOCK_LOST: The current clock as selected by the pipeline became

 *                          unusable. The pipeline will select a new clock on

 *                          the next PLAYING state change. The application

 *                          should set the pipeline to PAUSED and back to

 *                          PLAYING when this message is received.

 * @GST_MESSAGE_NEW_CLOCK: a new clock was selected in the pipeline.

 * @GST_MESSAGE_STRUCTURE_CHANGE: the structure of the pipeline changed. This

 * message is used internally and never forwarded to the application.

 * @GST_MESSAGE_STREAM_STATUS: status about a stream, emitted when it starts,

 *                             stops, errors, etc..

 * @GST_MESSAGE_APPLICATION: message posted by the application, possibly

 *                           via an application-specific element.

 * @GST_MESSAGE_ELEMENT: element-specific message, see the specific element's

 *                       documentation

 * @GST_MESSAGE_SEGMENT_START: pipeline started playback of a segment. This

 * message is used internally and never forwarded to the application.

 * @GST_MESSAGE_SEGMENT_DONE: pipeline completed playback of a segment. This

 * message is forwarded to the application after all elements that posted

 * @GST_MESSAGE_SEGMENT_START posted a GST_MESSAGE_SEGMENT_DONE message.

 * @GST_MESSAGE_DURATION_CHANGED: The duration of a pipeline changed. The

 * application can get the new duration with a duration query.

 * @GST_MESSAGE_ASYNC_START: Posted by elements when they start an ASYNC

 * #GstStateChange. This message is not forwarded to the application but is used

 * internally.

 * @GST_MESSAGE_ASYNC_DONE: Posted by elements when they complete an ASYNC

 * #GstStateChange. The application will only receive this message from the toplevel

 * pipeline.

 * @GST_MESSAGE_LATENCY: Posted by elements when their latency changes. The

 * application should recalculate and distribute a new latency.

 * @GST_MESSAGE_REQUEST_STATE: Posted by elements when they want the pipeline to

 * change state. This message is a suggestion to the application which can

 * decide to perform the state change on (part of) the pipeline.

 * @GST_MESSAGE_STEP_START: A stepping operation was started.

 * @GST_MESSAGE_QOS: A buffer was dropped or an element changed its processing

 * strategy for Quality of Service reasons.

 * @GST_MESSAGE_PROGRESS: A progress message.

 * @GST_MESSAGE_TOC: A new table of contents (TOC) was found or previously found TOC

 * was updated.

 * @GST_MESSAGE_RESET_TIME: Message to request resetting the pipeline's

 *     running time from the pipeline. This is an internal message which

 *     applications will likely never receive.

 * @GST_MESSAGE_STREAM_START: Message indicating start of a new stream. Useful

 *     e.g. when using playbin in gapless playback mode, to get notified when

 *     the next title actually starts playing (which will be some time after

 *     the URI for the next title has been set).

 * @GST_MESSAGE_NEED_CONTEXT: Message indicating that an element wants a specific context (Since 1.2)

 * @GST_MESSAGE_HAVE_CONTEXT: Message indicating that an element created a context (Since 1.2)

 * @GST_MESSAGE_EXTENDED: Message is an extended message type (see below).

 *     These extended message IDs can't be used directly with mask-based API

 *     like gst_bus_poll() or gst_bus_timed_pop_filtered(), but you can still

 *     filter for GST_MESSAGE_EXTENDED and then check the result for the

 *     specific type. (Since 1.4)

 * @GST_MESSAGE_DEVICE_ADDED: Message indicating a #GstDevice was added to

 *     a #GstDeviceProvider (Since 1.4)

 * @GST_MESSAGE_DEVICE_REMOVED: Message indicating a #GstDevice was removed

 *     from a #GstDeviceProvider (Since 1.4)

 * @GST_MESSAGE_PROPERTY_NOTIFY: Message indicating a #GObject property has

 *     changed (Since 1.10)

 * @GST_MESSAGE_STREAM_COLLECTION: Message indicating a new #GstStreamCollection

 *     is available (Since 1.10)

 * @GST_MESSAGE_STREAMS_SELECTED: Message indicating the active selection of

 *     #GstStreams has changed (Since 1.10)

 * @GST_MESSAGE_REDIRECT: Message indicating to request the application to

 *     try to play the given URL(s). Useful if for example a HTTP 302/303

 *     response is received with a non-HTTP URL inside. (Since 1.10)

 * @GST_MESSAGE_ANY: mask for all of the above messages.

 *

 * The different message types that are available.

 */

/* NOTE: keep in sync with quark registration in gstmessage.c

 * NOTE: keep GST_MESSAGE_ANY a valid gint to avoid compiler warnings.

 */

/* FIXME: 2.0: Make it NOT flags, just a regular 1,2,3,4.. enumeration */

/* FIXME: For GST_MESSAGE_ANY ~0 -> 0xffffffff see

 *        https://bugzilla.gnome.org/show_bug.cgi?id=732633

 */

typedef enum

{

  GST_MESSAGE_UNKNOWN           = 0,

  GST_MESSAGE_EOS               = (1 << 0),

  GST_MESSAGE_ERROR             = (1 << 1),

  GST_MESSAGE_WARNING           = (1 << 2),

  GST_MESSAGE_INFO              = (1 << 3),

  GST_MESSAGE_TAG               = (1 << 4),

  GST_MESSAGE_BUFFERING         = (1 << 5),

  GST_MESSAGE_STATE_CHANGED     = (1 << 6),

  GST_MESSAGE_STATE_DIRTY       = (1 << 7),

  GST_MESSAGE_STEP_DONE         = (1 << 8),

  GST_MESSAGE_CLOCK_PROVIDE     = (1 << 9),

  GST_MESSAGE_CLOCK_LOST        = (1 << 10),

  GST_MESSAGE_NEW_CLOCK         = (1 << 11),

  GST_MESSAGE_STRUCTURE_CHANGE  = (1 << 12),

  GST_MESSAGE_STREAM_STATUS     = (1 << 13),

  GST_MESSAGE_APPLICATION       = (1 << 14),

  GST_MESSAGE_ELEMENT           = (1 << 15),

  GST_MESSAGE_SEGMENT_START     = (1 << 16),

  GST_MESSAGE_SEGMENT_DONE      = (1 << 17),

  GST_MESSAGE_DURATION_CHANGED  = (1 << 18),

  GST_MESSAGE_LATENCY           = (1 << 19),

  GST_MESSAGE_ASYNC_START       = (1 << 20),

  GST_MESSAGE_ASYNC_DONE        = (1 << 21),

  GST_MESSAGE_REQUEST_STATE     = (1 << 22),

  GST_MESSAGE_STEP_START        = (1 << 23),

  GST_MESSAGE_QOS               = (1 << 24),

  GST_MESSAGE_PROGRESS          = (1 << 25),

  GST_MESSAGE_TOC               = (1 << 26),

  GST_MESSAGE_RESET_TIME        = (1 << 27),

  GST_MESSAGE_STREAM_START      = (1 << 28),

  GST_MESSAGE_NEED_CONTEXT      = (1 << 29),

  GST_MESSAGE_HAVE_CONTEXT      = (1 << 30),

  GST_MESSAGE_EXTENDED          = (gint) (1u << 31),

  GST_MESSAGE_DEVICE_ADDED      = GST_MESSAGE_EXTENDED + 1,

  GST_MESSAGE_DEVICE_REMOVED    = GST_MESSAGE_EXTENDED + 2,

  GST_MESSAGE_PROPERTY_NOTIFY   = GST_MESSAGE_EXTENDED + 3,

  GST_MESSAGE_STREAM_COLLECTION = GST_MESSAGE_EXTENDED + 4,

  GST_MESSAGE_STREAMS_SELECTED  = GST_MESSAGE_EXTENDED + 5,

  GST_MESSAGE_REDIRECT          = GST_MESSAGE_EXTENDED + 6,

  GST_MESSAGE_ANY               = (gint) (0xffffffff)

} GstMessageType;

#include <gst/gstminiobject.h>

#include <gst/gstobject.h>

#include <gst/gstelement.h>

#include <gst/gsttaglist.h>

#include <gst/gststructure.h>

#include <gst/gstquery.h>

#include <gst/gsttoc.h>

#include <gst/gstdevice.h>

#include <gst/gststreams.h>

#include <gst/gststreamcollection.h>

GST_API GType _gst_message_type;

#define GST_TYPE_MESSAGE                         (_gst_message_type)

#define GST_IS_MESSAGE(obj)                      (GST_IS_MINI_OBJECT_TYPE (obj, GST_TYPE_MESSAGE))

#define GST_MESSAGE_CAST(obj)                    ((GstMessage*)(obj))

#define GST_MESSAGE(obj)                         (GST_MESSAGE_CAST(obj))

/* the lock is used to handle the synchronous handling of messages,

 * the emiting thread is block until the handling thread processed

 * the message using this mutex/cond pair */

#define GST_MESSAGE_GET_LOCK(message)   (&GST_MESSAGE_CAST(message)->lock)

#define GST_MESSAGE_LOCK(message)       g_mutex_lock(GST_MESSAGE_GET_LOCK(message))

#define GST_MESSAGE_UNLOCK(message)     g_mutex_unlock(GST_MESSAGE_GET_LOCK(message))

#define GST_MESSAGE_GET_COND(message)   (&GST_MESSAGE_CAST(message)->cond)

#define GST_MESSAGE_WAIT(message)       g_cond_wait(GST_MESSAGE_GET_COND(message),GST_MESSAGE_GET_LOCK(message))

#define GST_MESSAGE_SIGNAL(message)     g_cond_signal(GST_MESSAGE_GET_COND(message))

/**

 * GST_MESSAGE_TYPE:

 * @message: a #GstMessage

 *

 * Get the #GstMessageType of @message.

 */

#define GST_MESSAGE_TYPE(message)       (GST_MESSAGE_CAST(message)->type)

/**

 * GST_MESSAGE_TYPE_IS_EXTENDED:

 * @message: a #GstMessage

 *

 * Check if the message is in the extended message group

 * Since: 1.4

 */

#define GST_MESSAGE_TYPE_IS_EXTENDED(message)       (!!(GST_MESSAGE_CAST(message)->type & GST_MESSAGE_EXTENDED))

/**

 * GST_MESSAGE_TYPE_NAME:

 * @message: a #GstMessage

 *

 * Get a constant string representation of the #GstMessageType of @message.

 */

#define GST_MESSAGE_TYPE_NAME(message)  gst_message_type_get_name(GST_MESSAGE_TYPE(message))

/**

 * GST_MESSAGE_TIMESTAMP:

 * @message: a #GstMessage

 *

 * Get the timestamp of @message. This is the timestamp when the message

 * was created.

 */

#define GST_MESSAGE_TIMESTAMP(message)  (GST_MESSAGE_CAST(message)->timestamp)

/**

 * GST_MESSAGE_SRC:

 * @message: a #GstMessage

 *

 * Get the object that posted @message.

 */

#define GST_MESSAGE_SRC(message)        (GST_MESSAGE_CAST(message)->src)

/**

 * GST_MESSAGE_SEQNUM:

 * @message: a #GstMessage

 *

 * Get the sequence number of @message.

 */

#define GST_MESSAGE_SEQNUM(message)     (GST_MESSAGE_CAST(message)->seqnum)

/**

 * GST_MESSAGE_SRC_NAME:

 * @message: a #GstMessage

 *

 * Get the name of the object that posted @message. Returns "(NULL)" if

 * the message has no source object set.

 */

#define GST_MESSAGE_SRC_NAME(message)   (GST_MESSAGE_SRC(message) ? \

    GST_OBJECT_NAME (GST_MESSAGE_SRC(message)) : "(NULL)")

/**

 * GstStructureChangeType:

 * @GST_STRUCTURE_CHANGE_TYPE_PAD_LINK: Pad linking is starting or done.

 * @GST_STRUCTURE_CHANGE_TYPE_PAD_UNLINK: Pad unlinking is starting or done.

 *

 * The type of a %GST_MESSAGE_STRUCTURE_CHANGE.

 */

typedef enum {

  GST_STRUCTURE_CHANGE_TYPE_PAD_LINK   = 0,

  GST_STRUCTURE_CHANGE_TYPE_PAD_UNLINK = 1

} GstStructureChangeType;

/**

 * GstStreamStatusType:

 * @GST_STREAM_STATUS_TYPE_CREATE: A new thread need to be created.

 * @GST_STREAM_STATUS_TYPE_ENTER: a thread entered its loop function

 * @GST_STREAM_STATUS_TYPE_LEAVE: a thread left its loop function

 * @GST_STREAM_STATUS_TYPE_DESTROY: a thread is destroyed

 * @GST_STREAM_STATUS_TYPE_START: a thread is started

 * @GST_STREAM_STATUS_TYPE_PAUSE: a thread is paused

 * @GST_STREAM_STATUS_TYPE_STOP: a thread is stopped

 *

 * The type of a %GST_MESSAGE_STREAM_STATUS. The stream status messages inform the

 * application of new streaming threads and their status.

 */

typedef enum {

  GST_STREAM_STATUS_TYPE_CREATE   = 0,

  GST_STREAM_STATUS_TYPE_ENTER    = 1,

  GST_STREAM_STATUS_TYPE_LEAVE    = 2,

  GST_STREAM_STATUS_TYPE_DESTROY  = 3,

  GST_STREAM_STATUS_TYPE_START    = 8,

  GST_STREAM_STATUS_TYPE_PAUSE    = 9,

  GST_STREAM_STATUS_TYPE_STOP     = 10

} GstStreamStatusType;

/**

 * GstProgressType:

 * @GST_PROGRESS_TYPE_START: A new task started.

 * @GST_PROGRESS_TYPE_CONTINUE: A task completed and a new one continues.

 * @GST_PROGRESS_TYPE_COMPLETE: A task completed.

 * @GST_PROGRESS_TYPE_CANCELED: A task was canceled.

 * @GST_PROGRESS_TYPE_ERROR: A task caused an error. An error message is also

 *          posted on the bus.

 *

 * The type of a %GST_MESSAGE_PROGRESS. The progress messages inform the

 * application of the status of asynchronous tasks.

 */

typedef enum {

  GST_PROGRESS_TYPE_START    = 0,

  GST_PROGRESS_TYPE_CONTINUE = 1,

  GST_PROGRESS_TYPE_COMPLETE = 2,

  GST_PROGRESS_TYPE_CANCELED = 3,

  GST_PROGRESS_TYPE_ERROR    = 4

} GstProgressType;

/**

 * GstMessage:

 * @mini_object: the parent structure

 * @type: the #GstMessageType of the message

 * @timestamp: the timestamp of the message

 * @src: the src of the message

 * @seqnum: the sequence number of the message

 *

 * A #GstMessage.

 */

struct _GstMessage

{

  GstMiniObject   mini_object;

  /*< public > *//* with COW */

  GstMessageType  type;

  guint64         timestamp;

  GstObject      *src;

  guint32         seqnum;

  /*< private >*//* with MESSAGE_LOCK */

  GMutex          lock;                 /* lock and cond for async delivery */

  GCond           cond;

};

#include <gst/gstquery.h>

GST_API

GType           gst_message_get_type            (void);

GST_API

const gchar*    gst_message_type_get_name       (GstMessageType type);

GST_API

GQuark          gst_message_type_to_quark       (GstMessageType type);

/* refcounting */

/**

 * gst_message_ref:

 * @msg: the message to ref

 *

 * Convenience macro to increase the reference count of the message.

 *

 * Returns: @msg (for convenience when doing assignments)

 */

static inline GstMessage *

gst_message_ref (GstMessage * msg)

{

  return (GstMessage *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (msg));

}

/**

 * gst_message_unref:

 * @msg: the message to unref

 *

 * Convenience macro to decrease the reference count of the message, possibly

 * freeing it.

 */

static inline void

gst_message_unref (GstMessage * msg)

{

  gst_mini_object_unref (GST_MINI_OBJECT_CAST (msg));

}

/* copy message */

/**

 * gst_message_copy:

 * @msg: the message to copy

 *

 * Creates a copy of the message. Returns a copy of the message.

 *

 * Returns: (transfer full): a new copy of @msg.

 *

 * MT safe

 */

static inline GstMessage *

gst_message_copy (const GstMessage * msg)

{

  return GST_MESSAGE_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (msg)));

}

/**

 * gst_message_is_writable:

 * @msg: a #GstMessage

 *

 * Tests if you can safely write into a message's structure or validly

 * modify the seqnum and timestamp fields.

 */

#define         gst_message_is_writable(msg)     gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (msg))

/**

 * gst_message_make_writable:

 * @msg: (transfer full): the message to make writable

 *

 * Checks if a message is writable. If not, a writable copy is made and

 * returned.

 *

 * Returns: (transfer full): a message (possibly a duplicate) that is writable.

 *

 * MT safe

 */

#define         gst_message_make_writable(msg)  GST_MESSAGE_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (msg)))

/**

 * gst_message_replace:

 * @old_message: (inout) (transfer full) (nullable): pointer to a

 *     pointer to a #GstMessage to be replaced.

 * @new_message: (allow-none) (transfer none): pointer to a #GstMessage that will

 *     replace the message pointed to by @old_message.

 *

 * Modifies a pointer to a #GstMessage to point to a different #GstMessage. The

 * modification is done atomically (so this is useful for ensuring thread safety

 * in some cases), and the reference counts are updated appropriately (the old

 * message is unreffed, the new one is reffed).

 *

 * Either @new_message or the #GstMessage pointed to by @old_message may be %NULL.

 *

 * Returns: %TRUE if @new_message was different from @old_message

 */

static inline gboolean

gst_message_replace (GstMessage **old_message, GstMessage *new_message)

{

  return gst_mini_object_replace ((GstMiniObject **) old_message, (GstMiniObject *) new_message);

}

/* custom messages */

GST_API

GstMessage *    gst_message_new_custom          (GstMessageType type,

                                                 GstObject    * src,

                                                 GstStructure * structure) G_GNUC_MALLOC;

GST_API

const GstStructure *

                gst_message_get_structure       (GstMessage *message);

GST_API

GstStructure *  gst_message_writable_structure  (GstMessage *message);

GST_API

gboolean        gst_message_has_name            (GstMessage *message, const gchar *name);

/* identifiers for events and messages */

GST_API

guint32         gst_message_get_seqnum          (GstMessage *message);

GST_API

void            gst_message_set_seqnum          (GstMessage *message, guint32 seqnum);

/* EOS */

GST_API

GstMessage *    gst_message_new_eos             (GstObject * src) G_GNUC_MALLOC;

/* ERROR */

GST_API

GstMessage *    gst_message_new_error           (GstObject * src, GError * error, const gchar * debug) G_GNUC_MALLOC;

GST_API

GstMessage *    gst_message_new_error_with_details (GstObject * src, GError * error, const gchar * debug, GstStructure * details) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_error         (GstMessage *message, GError **gerror, gchar **debug);

GST_API

void            gst_message_parse_error_details (GstMessage *message, const GstStructure **structure);

/* WARNING */

GST_API

GstMessage *    gst_message_new_warning         (GstObject * src, GError * error, const gchar * debug) G_GNUC_MALLOC;

GST_API

GstMessage *    gst_message_new_warning_with_details (GstObject * src, GError * error, const gchar * debug, GstStructure * details) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_warning       (GstMessage *message, GError **gerror, gchar **debug);

GST_API

void            gst_message_parse_warning_details (GstMessage *message, const GstStructure **structure);

/* INFO */

GST_API

GstMessage *    gst_message_new_info            (GstObject * src, GError * error, const gchar * debug) G_GNUC_MALLOC;

GST_API

GstMessage *    gst_message_new_info_with_details (GstObject * src, GError * error, const gchar * debug, GstStructure * details) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_info          (GstMessage *message, GError **gerror, gchar **debug);

GST_API

void            gst_message_parse_info_details  (GstMessage *message, const GstStructure **structure);

/* TAG */

GST_API

GstMessage *    gst_message_new_tag             (GstObject * src, GstTagList * tag_list) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_tag           (GstMessage *message, GstTagList **tag_list);

/* BUFFERING */

GST_API

GstMessage *    gst_message_new_buffering         (GstObject * src, gint percent) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_buffering       (GstMessage *message, gint *percent);

GST_API

void            gst_message_set_buffering_stats   (GstMessage *message, GstBufferingMode mode,

                                                   gint avg_in, gint avg_out,

                                                   gint64 buffering_left);

GST_API

void            gst_message_parse_buffering_stats (GstMessage *message, GstBufferingMode *mode,

                                                   gint *avg_in, gint *avg_out,

                                                   gint64 *buffering_left);

/* STATE_CHANGED */

GST_API

GstMessage *    gst_message_new_state_changed   (GstObject * src, GstState oldstate,

                                                 GstState newstate, GstState pending) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_state_changed (GstMessage *message, GstState *oldstate,

                                                 GstState *newstate, GstState *pending);

/* STATE_DIRTY */

GST_API

GstMessage *    gst_message_new_state_dirty     (GstObject * src) G_GNUC_MALLOC;

/* STEP_DONE */

GST_API

GstMessage *    gst_message_new_step_done       (GstObject * src, GstFormat format, guint64 amount,

                                                 gdouble rate, gboolean flush, gboolean intermediate,

                                                 guint64 duration, gboolean eos) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_step_done     (GstMessage * message, GstFormat *format, guint64 *amount,

                                                 gdouble *rate, gboolean *flush, gboolean *intermediate,

                                                 guint64 *duration, gboolean *eos);

/* CLOCK_PROVIDE */

GST_API

GstMessage *    gst_message_new_clock_provide   (GstObject * src, GstClock *clock, gboolean ready) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_clock_provide (GstMessage *message, GstClock **clock,

                                                 gboolean *ready);

/* CLOCK_LOST */

GST_API

GstMessage *    gst_message_new_clock_lost      (GstObject * src, GstClock *clock) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_clock_lost    (GstMessage *message, GstClock **clock);

/* NEW_CLOCK */

GST_API

GstMessage *    gst_message_new_new_clock       (GstObject * src, GstClock *clock) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_new_clock     (GstMessage *message, GstClock **clock);

/* APPLICATION */

GST_API

GstMessage *    gst_message_new_application     (GstObject * src, GstStructure * structure) G_GNUC_MALLOC;

/* ELEMENT */

GST_API

GstMessage *    gst_message_new_element         (GstObject * src, GstStructure * structure) G_GNUC_MALLOC;

/* SEGMENT_START */

GST_API

GstMessage *    gst_message_new_segment_start   (GstObject * src, GstFormat format, gint64 position) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_segment_start (GstMessage *message, GstFormat *format,

                                                 gint64 *position);

/* SEGMENT_DONE */

GST_API

GstMessage *    gst_message_new_segment_done    (GstObject * src, GstFormat format, gint64 position) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_segment_done  (GstMessage *message, GstFormat *format,

                                                 gint64 *position);

/* DURATION_CHANGED */

GST_API

GstMessage *    gst_message_new_duration_changed (GstObject * src) G_GNUC_MALLOC;

/* LATENCY */

GST_API

GstMessage *    gst_message_new_latency         (GstObject * src) G_GNUC_MALLOC;

/* ASYNC_START */

GST_API

GstMessage *    gst_message_new_async_start     (GstObject * src) G_GNUC_MALLOC;

/* ASYNC_DONE */

GST_API

GstMessage *    gst_message_new_async_done      (GstObject * src, GstClockTime running_time) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_async_done    (GstMessage *message, GstClockTime *running_time);

/* STRUCTURE CHANGE */

GST_API

GstMessage *    gst_message_new_structure_change   (GstObject * src, GstStructureChangeType type,

                                                    GstElement *owner, gboolean busy) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_structure_change (GstMessage *message, GstStructureChangeType *type,

                                                    GstElement **owner, gboolean *busy);

/* STREAM STATUS */

GST_API

GstMessage *    gst_message_new_stream_status        (GstObject * src, GstStreamStatusType type,

                                                      GstElement *owner) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_stream_status      (GstMessage *message, GstStreamStatusType *type,

                                                      GstElement **owner);

GST_API

void            gst_message_set_stream_status_object (GstMessage *message, const GValue *object);

GST_API

const GValue *  gst_message_get_stream_status_object (GstMessage *message);

/* REQUEST_STATE */

GST_API

GstMessage *    gst_message_new_request_state   (GstObject * src, GstState state) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_request_state (GstMessage * message, GstState *state);

/* STEP_START */

GST_API

GstMessage *    gst_message_new_step_start      (GstObject * src, gboolean active, GstFormat format,

                                                 guint64 amount, gdouble rate, gboolean flush,

                                                 gboolean intermediate) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_step_start    (GstMessage * message, gboolean *active, GstFormat *format,

                                                 guint64 *amount, gdouble *rate, gboolean *flush,

                                                 gboolean *intermediate);

/* QOS */

GST_API

GstMessage *    gst_message_new_qos             (GstObject * src, gboolean live, guint64 running_time,

                                                 guint64 stream_time, guint64 timestamp, guint64 duration) G_GNUC_MALLOC;

GST_API

void            gst_message_set_qos_values      (GstMessage * message, gint64 jitter, gdouble proportion,

                                                 gint quality);

GST_API

void            gst_message_set_qos_stats       (GstMessage * message, GstFormat format, guint64 processed,

                                                 guint64 dropped);

GST_API

void            gst_message_parse_qos           (GstMessage * message, gboolean * live, guint64 * running_time,

                                                 guint64 * stream_time, guint64 * timestamp, guint64 * duration);

GST_API

void            gst_message_parse_qos_values    (GstMessage * message, gint64 * jitter, gdouble * proportion,

                                                 gint * quality);

GST_API

void            gst_message_parse_qos_stats     (GstMessage * message, GstFormat * format, guint64 * processed,

                                                 guint64 * dropped);

/* PROGRESS */

GST_API

GstMessage *    gst_message_new_progress           (GstObject * src, GstProgressType type, const gchar *code,

                                                    const gchar *text) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_progress         (GstMessage * message, GstProgressType * type, gchar ** code,

                                                    gchar ** text);

/* TOC */

GST_API

GstMessage *    gst_message_new_toc             (GstObject *src, GstToc *toc, gboolean updated);

GST_API

void            gst_message_parse_toc           (GstMessage *message, GstToc **toc, gboolean *updated);

/* RESET_TIME */

GST_API

GstMessage *    gst_message_new_reset_time      (GstObject * src, GstClockTime running_time) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_reset_time    (GstMessage *message, GstClockTime *running_time);

/* STREAM_START */

GST_API

GstMessage *    gst_message_new_stream_start    (GstObject * src) G_GNUC_MALLOC;

GST_API

void            gst_message_set_group_id        (GstMessage *message, guint group_id);

GST_API

gboolean        gst_message_parse_group_id      (GstMessage *message, guint *group_id);

/* NEED_CONTEXT */

GST_API

GstMessage *    gst_message_new_need_context    (GstObject * src, const gchar * context_type) G_GNUC_MALLOC;

GST_API

gboolean        gst_message_parse_context_type  (GstMessage * message, const gchar ** context_type);

/* HAVE_CONTEXT */

GST_API

GstMessage *    gst_message_new_have_context    (GstObject * src, GstContext *context) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_have_context  (GstMessage *message, GstContext **context);

/* DEVICE_ADDED */

GST_API

GstMessage *    gst_message_new_device_added    (GstObject * src, GstDevice * device) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_device_added  (GstMessage * message, GstDevice ** device);

/* DEVICE_REMOVED */

GST_API

GstMessage *    gst_message_new_device_removed    (GstObject * src, GstDevice * device) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_device_removed  (GstMessage * message, GstDevice ** device);

/* PROPERTY_NOTIFY */

GST_API

GstMessage *    gst_message_new_property_notify   (GstObject * src, const gchar * property_name, GValue * val) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_property_notify (GstMessage * message, GstObject ** object, const gchar ** property_name, const GValue ** property_value);

/* STREAM_COLLECTION */

GST_API

GstMessage *    gst_message_new_stream_collection   (GstObject * src, GstStreamCollection * collection) G_GNUC_MALLOC;

GST_API

void            gst_message_parse_stream_collection (GstMessage *message, GstStreamCollection **collection);

/* STREAMS_SELECTED */

GST_API

GstMessage *    gst_message_new_streams_selected (GstObject *src, GstStreamCollection *collection);

GST_API

void            gst_message_streams_selected_add (GstMessage *message, GstStream *stream);

GST_API

void            gst_message_parse_streams_selected (GstMessage * message, GstStreamCollection **collection);

GST_API

guint           gst_message_streams_selected_get_size (GstMessage * message);

GST_API

GstStream      *gst_message_streams_selected_get_stream (GstMessage *message, guint idx);

/* REDIRECT */

GST_API

GstMessage *    gst_message_new_redirect             (GstObject * src, const gchar * location, GstTagList * tag_list, const GstStructure * entry_struct) G_GNUC_MALLOC;

GST_API

void            gst_message_add_redirect_entry       (GstMessage * message, const gchar * location, GstTagList * tag_list, const GstStructure * entry_struct);

GST_API

void            gst_message_parse_redirect_entry     (GstMessage * message, gsize entry_index, const gchar ** location, GstTagList ** tag_list, const GstStructure ** entry_struct);

GST_API

gsize           gst_message_get_num_redirect_entries (GstMessage * message);

#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC

G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstMessage, gst_message_unref)

#endif

G_END_DECLS

#endif /* __GST_MESSAGE_H__ */