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358 lines
14 KiB
C
358 lines
14 KiB
C
/* GStreamer
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* Copyright (C) 2005 Wim Taymans <wim@fluendo.com>
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* Copyright (C) 2008 Mark Nauwelaerts <mnauw@users.sourceforge.net>
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*
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* gstcollectpads.h:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_COLLECT_PADS_H__
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#define __GST_COLLECT_PADS_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_COLLECT_PADS (gst_collect_pads_get_type())
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#define GST_COLLECT_PADS(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_COLLECT_PADS,GstCollectPads))
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#define GST_COLLECT_PADS_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_COLLECT_PADS,GstCollectPadsClass))
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#define GST_COLLECT_PADS_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_COLLECT_PADS,GstCollectPadsClass))
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#define GST_IS_COLLECT_PADS(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_COLLECT_PADS))
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#define GST_IS_COLLECT_PADS_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_COLLECT_PADS))
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typedef struct _GstCollectData GstCollectData;
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typedef struct _GstCollectDataPrivate GstCollectDataPrivate;
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typedef struct _GstCollectPads GstCollectPads;
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typedef struct _GstCollectPadsPrivate GstCollectPadsPrivate;
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typedef struct _GstCollectPadsClass GstCollectPadsClass;
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/**
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* GstCollectDataDestroyNotify:
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* @data: the #GstCollectData that will be freed
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*
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* A function that will be called when the #GstCollectData will be freed.
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* It is passed the pointer to the structure and should free any custom
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* memory and resources allocated for it.
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*/
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typedef void (*GstCollectDataDestroyNotify) (GstCollectData *data);
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/**
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* GstCollectPadsStateFlags:
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* @GST_COLLECT_PADS_STATE_EOS: Set if collectdata's pad is EOS.
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* @GST_COLLECT_PADS_STATE_FLUSHING: Set if collectdata's pad is flushing.
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* @GST_COLLECT_PADS_STATE_NEW_SEGMENT: Set if collectdata's pad received a
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* new_segment event.
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* @GST_COLLECT_PADS_STATE_WAITING: Set if collectdata's pad must be waited
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* for when collecting.
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* @GST_COLLECT_PADS_STATE_LOCKED: Set collectdata's pad WAITING state must
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* not be changed.
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* #GstCollectPadsStateFlags indicate private state of a collectdata('s pad).
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*/
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typedef enum {
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GST_COLLECT_PADS_STATE_EOS = 1 << 0,
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GST_COLLECT_PADS_STATE_FLUSHING = 1 << 1,
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GST_COLLECT_PADS_STATE_NEW_SEGMENT = 1 << 2,
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GST_COLLECT_PADS_STATE_WAITING = 1 << 3,
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GST_COLLECT_PADS_STATE_LOCKED = 1 << 4
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} GstCollectPadsStateFlags;
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/**
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* GST_COLLECT_PADS_STATE:
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* @data: a #GstCollectData.
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*
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* A flags word containing #GstCollectPadsStateFlags flags set
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* on this collected pad.
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*/
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#define GST_COLLECT_PADS_STATE(data) (((GstCollectData *) data)->state)
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/**
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* GST_COLLECT_PADS_STATE_IS_SET:
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* @data: a #GstCollectData.
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* @flag: the #GstCollectPadsStateFlags to check.
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*
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* Gives the status of a specific flag on a collected pad.
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*/
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#define GST_COLLECT_PADS_STATE_IS_SET(data,flag) !!(GST_COLLECT_PADS_STATE (data) & flag)
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/**
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* GST_COLLECT_PADS_STATE_SET:
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* @data: a #GstCollectData.
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* @flag: the #GstCollectPadsStateFlags to set.
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*
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* Sets a state flag on a collected pad.
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*/
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#define GST_COLLECT_PADS_STATE_SET(data,flag) (GST_COLLECT_PADS_STATE (data) |= flag)
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/**
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* GST_COLLECT_PADS_STATE_UNSET:
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* @data: a #GstCollectData.
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* @flag: the #GstCollectPadsStateFlags to clear.
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*
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* Clears a state flag on a collected pad.
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*/
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#define GST_COLLECT_PADS_STATE_UNSET(data,flag) (GST_COLLECT_PADS_STATE (data) &= ~(flag))
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/**
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* GstCollectData:
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* @collect: owner #GstCollectPads
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* @pad: #GstPad managed by this data
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* @buffer: currently queued buffer.
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* @pos: position in the buffer
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* @segment: last segment received.
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*
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* Structure used by the collect_pads.
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*/
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struct _GstCollectData
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{
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/* with STREAM_LOCK of @collect */
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GstCollectPads *collect;
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GstPad *pad;
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GstBuffer *buffer;
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guint pos;
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GstSegment segment;
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/*< private >*/
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/* state: bitfield for easier extension;
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* eos, flushing, new_segment, waiting */
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GstCollectPadsStateFlags state;
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GstCollectDataPrivate *priv;
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gpointer _gst_reserved[GST_PADDING];
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};
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/**
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* GstCollectPadsFunction:
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* @pads: the #GstCollectPads that trigered the callback
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* @user_data: user data passed to gst_collect_pads_set_function()
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*
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* A function that will be called when all pads have received data.
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*
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* Returns: #GST_FLOW_OK for success
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*/
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typedef GstFlowReturn (*GstCollectPadsFunction) (GstCollectPads *pads, gpointer user_data);
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/**
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* GstCollectPadsBufferFunction:
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* @pads: the #GstCollectPads that trigered the callback
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* @data: the #GstCollectData of pad that has received the buffer
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* @buffer: (transfer full): the #GstBuffer
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* @user_data: user data passed to gst_collect_pads_set_buffer_function()
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*
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* A function that will be called when a (considered oldest) buffer can be muxed.
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* If all pads have reached EOS, this function is called with NULL @buffer
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* and NULL @data.
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*
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* Returns: #GST_FLOW_OK for success
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*/
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typedef GstFlowReturn (*GstCollectPadsBufferFunction) (GstCollectPads *pads, GstCollectData *data,
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GstBuffer *buffer, gpointer user_data);
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/**
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* GstCollectPadsCompareFunction:
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* @pads: the #GstCollectPads that is comparing the timestamps
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* @data1: the first #GstCollectData
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* @timestamp1: the first timestamp
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* @data2: the second #GstCollectData
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* @timestamp2: the second timestamp
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* @user_data: user data passed to gst_collect_pads_set_compare_function()
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*
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* A function for comparing two timestamps of buffers or newsegments collected on one pad.
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*
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* Returns: Integer less than zero when first timestamp is deemed older than the second one.
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* Zero if the timestamps are deemed equally old.
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* Integer greate than zero when second timestamp is deemed older than the first one.
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*/
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typedef gint (*GstCollectPadsCompareFunction) (GstCollectPads *pads,
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GstCollectData * data1, GstClockTime timestamp1,
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GstCollectData * data2, GstClockTime timestamp2,
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gpointer user_data);
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/**
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* GstCollectPadsEventFunction:
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* @pads: the #GstCollectPads that trigered the callback
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* @pad: the #GstPad that received an event
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* @event: the #GstEvent received
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* @user_data: user data passed to gst_collect_pads_set_event_function()
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*
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* A function that will be called while processing an event. It takes
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* ownership of the event and is responsible for chaining up (to
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* gst_collect_pads_event_default()) or dropping events (such typical cases
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* being handled by the default handler).
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*
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* Returns: %TRUE if the pad could handle the event
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*/
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typedef gboolean (*GstCollectPadsEventFunction) (GstCollectPads *pads, GstCollectData * pad,
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GstEvent * event, gpointer user_data);
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/**
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* GstCollectPadsQueryFunction:
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* @pads: the #GstCollectPads that trigered the callback
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* @pad: the #GstPad that received an event
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* @query: the #GstEvent received
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* @user_data: user data passed to gst_collect_pads_set_query_function()
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*
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* A function that will be called while processing a query. It takes
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* ownership of the query and is responsible for chaining up (to
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* events downstream (with gst_pad_event_default()).
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*
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* Returns: %TRUE if the pad could handle the event
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*/
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typedef gboolean (*GstCollectPadsQueryFunction) (GstCollectPads *pads, GstCollectData * pad,
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GstQuery * query, gpointer user_data);
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/**
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* GstCollectPadsClipFunction:
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* @pads: a #GstCollectPads
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* @data: a #GstCollectData
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* @inbuffer: (transfer full): the input #GstBuffer
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* @outbuffer: the output #GstBuffer
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* @user_data: user data
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*
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* A function that will be called when @inbuffer is received on the pad managed
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* by @data in the collecpad object @pads.
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*
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* The function should use the segment of @data and the negotiated media type on
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* the pad to perform clipping of @inbuffer.
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*
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* This function takes ownership of @inbuffer and should output a buffer in
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* @outbuffer or return %NULL in @outbuffer if the buffer should be dropped.
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*
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* Returns: a #GstFlowReturn that corresponds to the result of clipping.
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*/
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typedef GstFlowReturn (*GstCollectPadsClipFunction) (GstCollectPads *pads, GstCollectData *data,
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GstBuffer *inbuffer, GstBuffer **outbuffer,
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gpointer user_data);
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/**
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* GST_COLLECT_PADS_GET_STREAM_LOCK:
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* @pads: a #GstCollectPads
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*
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* Get the stream lock of @pads. The stream lock is used to coordinate and
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* serialize execution among the various streams being collected, and in
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* protecting the resources used to accomplish this.
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*/
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#define GST_COLLECT_PADS_GET_STREAM_LOCK(pads) (&((GstCollectPads *)pads)->stream_lock)
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/**
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* GST_COLLECT_PADS_STREAM_LOCK:
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* @pads: a #GstCollectPads
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*
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* Lock the stream lock of @pads.
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*/
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#define GST_COLLECT_PADS_STREAM_LOCK(pads) g_rec_mutex_lock(GST_COLLECT_PADS_GET_STREAM_LOCK (pads))
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/**
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* GST_COLLECT_PADS_STREAM_UNLOCK:
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* @pads: a #GstCollectPads
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*
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* Unlock the stream lock of @pads.
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*/
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#define GST_COLLECT_PADS_STREAM_UNLOCK(pads) g_rec_mutex_unlock(GST_COLLECT_PADS_GET_STREAM_LOCK (pads))
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/**
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* GstCollectPads:
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* @data: #GList of #GstCollectData managed by this #GstCollectPads.
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*
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* Collectpads object.
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*/
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struct _GstCollectPads {
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GstObject object;
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/*< public >*/ /* with LOCK and/or STREAM_LOCK */
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GSList *data; /* list of CollectData items */
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/*< private >*/
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GRecMutex stream_lock; /* used to serialize collection among several streams */
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GstCollectPadsPrivate *priv;
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstCollectPadsClass {
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GstObjectClass parent_class;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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GType gst_collect_pads_get_type(void);
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/* creating the object */
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GstCollectPads* gst_collect_pads_new (void);
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/* set the callbacks */
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void gst_collect_pads_set_function (GstCollectPads *pads,
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GstCollectPadsFunction func,
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gpointer user_data);
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void gst_collect_pads_set_buffer_function (GstCollectPads *pads,
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GstCollectPadsBufferFunction func,
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gpointer user_data);
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void gst_collect_pads_set_event_function (GstCollectPads *pads,
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GstCollectPadsEventFunction func,
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gpointer user_data);
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void gst_collect_pads_set_query_function (GstCollectPads *pads,
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GstCollectPadsQueryFunction func,
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gpointer user_data);
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void gst_collect_pads_set_compare_function (GstCollectPads *pads,
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GstCollectPadsCompareFunction func,
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gpointer user_data);
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void gst_collect_pads_set_clip_function (GstCollectPads *pads,
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GstCollectPadsClipFunction clipfunc,
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gpointer user_data);
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/* pad management */
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GstCollectData* gst_collect_pads_add_pad (GstCollectPads *pads, GstPad *pad, guint size,
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GstCollectDataDestroyNotify destroy_notify,
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gboolean lock);
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gboolean gst_collect_pads_remove_pad (GstCollectPads *pads, GstPad *pad);
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/* start/stop collection */
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void gst_collect_pads_start (GstCollectPads *pads);
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void gst_collect_pads_stop (GstCollectPads *pads);
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void gst_collect_pads_set_flushing (GstCollectPads *pads, gboolean flushing);
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/* get collected buffers */
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GstBuffer* gst_collect_pads_peek (GstCollectPads *pads, GstCollectData *data);
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GstBuffer* gst_collect_pads_pop (GstCollectPads *pads, GstCollectData *data);
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/* get collected bytes */
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guint gst_collect_pads_available (GstCollectPads *pads);
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guint gst_collect_pads_flush (GstCollectPads *pads, GstCollectData *data,
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guint size);
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GstBuffer* gst_collect_pads_read_buffer (GstCollectPads * pads, GstCollectData * data,
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guint size);
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GstBuffer* gst_collect_pads_take_buffer (GstCollectPads * pads, GstCollectData * data,
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guint size);
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/* setting and unsetting waiting mode */
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void gst_collect_pads_set_waiting (GstCollectPads *pads, GstCollectData *data,
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gboolean waiting);
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/* convenience helper */
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GstFlowReturn gst_collect_pads_clip_running_time (GstCollectPads * pads,
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GstCollectData * cdata,
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GstBuffer * buf, GstBuffer ** outbuf,
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gpointer user_data);
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/* default handlers */
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gboolean gst_collect_pads_event_default (GstCollectPads * pads, GstCollectData * data,
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GstEvent * event, gboolean discard);
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gboolean gst_collect_pads_query_default (GstCollectPads * pads, GstCollectData * data,
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GstQuery * query, gboolean discard);
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G_END_DECLS
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#endif /* __GST_COLLECT_PADS_H__ */
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