/* GStreamer * Copyright (C) 2005 Wim Taymans * Copyright (C) 2008 Mark Nauwelaerts * * gstcollectpads.h: * * 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_COLLECT_PADS_H__ #define __GST_COLLECT_PADS_H__ #include G_BEGIN_DECLS #define GST_TYPE_COLLECT_PADS (gst_collect_pads_get_type()) #define GST_COLLECT_PADS(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_COLLECT_PADS,GstCollectPads)) #define GST_COLLECT_PADS_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_COLLECT_PADS,GstCollectPadsClass)) #define GST_COLLECT_PADS_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_COLLECT_PADS,GstCollectPadsClass)) #define GST_IS_COLLECT_PADS(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_COLLECT_PADS)) #define GST_IS_COLLECT_PADS_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_COLLECT_PADS)) typedef struct _GstCollectData GstCollectData; typedef struct _GstCollectDataPrivate GstCollectDataPrivate; typedef struct _GstCollectPads GstCollectPads; typedef struct _GstCollectPadsPrivate GstCollectPadsPrivate; typedef struct _GstCollectPadsClass GstCollectPadsClass; /** * GstCollectDataDestroyNotify: * @data: the #GstCollectData that will be freed * * A function that will be called when the #GstCollectData will be freed. * It is passed the pointer to the structure and should free any custom * memory and resources allocated for it. */ typedef void (*GstCollectDataDestroyNotify) (GstCollectData *data); /** * GstCollectPadsStateFlags: * @GST_COLLECT_PADS_STATE_EOS: Set if collectdata's pad is EOS. * @GST_COLLECT_PADS_STATE_FLUSHING: Set if collectdata's pad is flushing. * @GST_COLLECT_PADS_STATE_NEW_SEGMENT: Set if collectdata's pad received a * new_segment event. * @GST_COLLECT_PADS_STATE_WAITING: Set if collectdata's pad must be waited * for when collecting. * @GST_COLLECT_PADS_STATE_LOCKED: Set collectdata's pad WAITING state must * not be changed. * #GstCollectPadsStateFlags indicate private state of a collectdata('s pad). */ typedef enum { GST_COLLECT_PADS_STATE_EOS = 1 << 0, GST_COLLECT_PADS_STATE_FLUSHING = 1 << 1, GST_COLLECT_PADS_STATE_NEW_SEGMENT = 1 << 2, GST_COLLECT_PADS_STATE_WAITING = 1 << 3, GST_COLLECT_PADS_STATE_LOCKED = 1 << 4 } GstCollectPadsStateFlags; /** * GST_COLLECT_PADS_STATE: * @data: a #GstCollectData. * * A flags word containing #GstCollectPadsStateFlags flags set * on this collected pad. */ #define GST_COLLECT_PADS_STATE(data) (((GstCollectData *) data)->state) /** * GST_COLLECT_PADS_STATE_IS_SET: * @data: a #GstCollectData. * @flag: the #GstCollectPadsStateFlags to check. * * Gives the status of a specific flag on a collected pad. */ #define GST_COLLECT_PADS_STATE_IS_SET(data,flag) !!(GST_COLLECT_PADS_STATE (data) & flag) /** * GST_COLLECT_PADS_STATE_SET: * @data: a #GstCollectData. * @flag: the #GstCollectPadsStateFlags to set. * * Sets a state flag on a collected pad. */ #define GST_COLLECT_PADS_STATE_SET(data,flag) (GST_COLLECT_PADS_STATE (data) |= flag) /** * GST_COLLECT_PADS_STATE_UNSET: * @data: a #GstCollectData. * @flag: the #GstCollectPadsStateFlags to clear. * * Clears a state flag on a collected pad. */ #define GST_COLLECT_PADS_STATE_UNSET(data,flag) (GST_COLLECT_PADS_STATE (data) &= ~(flag)) /** * GstCollectData: * @collect: owner #GstCollectPads * @pad: #GstPad managed by this data * @buffer: currently queued buffer. * @pos: position in the buffer * @segment: last segment received. * * Structure used by the collect_pads. */ struct _GstCollectData { /* with STREAM_LOCK of @collect */ GstCollectPads *collect; GstPad *pad; GstBuffer *buffer; guint pos; GstSegment segment; /*< private >*/ /* state: bitfield for easier extension; * eos, flushing, new_segment, waiting */ GstCollectPadsStateFlags state; GstCollectDataPrivate *priv; gpointer _gst_reserved[GST_PADDING]; }; /** * GstCollectPadsFunction: * @pads: the #GstCollectPads that trigered the callback * @user_data: user data passed to gst_collect_pads_set_function() * * A function that will be called when all pads have received data. * * Returns: #GST_FLOW_OK for success */ typedef GstFlowReturn (*GstCollectPadsFunction) (GstCollectPads *pads, gpointer user_data); /** * GstCollectPadsBufferFunction: * @pads: the #GstCollectPads that trigered the callback * @data: the #GstCollectData of pad that has received the buffer * @buffer: (transfer full): the #GstBuffer * @user_data: user data passed to gst_collect_pads_set_buffer_function() * * A function that will be called when a (considered oldest) buffer can be muxed. * If all pads have reached EOS, this function is called with NULL @buffer * and NULL @data. * * Returns: #GST_FLOW_OK for success */ typedef GstFlowReturn (*GstCollectPadsBufferFunction) (GstCollectPads *pads, GstCollectData *data, GstBuffer *buffer, gpointer user_data); /** * GstCollectPadsCompareFunction: * @pads: the #GstCollectPads that is comparing the timestamps * @data1: the first #GstCollectData * @timestamp1: the first timestamp * @data2: the second #GstCollectData * @timestamp2: the second timestamp * @user_data: user data passed to gst_collect_pads_set_compare_function() * * A function for comparing two timestamps of buffers or newsegments collected on one pad. * * Returns: Integer less than zero when first timestamp is deemed older than the second one. * Zero if the timestamps are deemed equally old. * Integer greate than zero when second timestamp is deemed older than the first one. */ typedef gint (*GstCollectPadsCompareFunction) (GstCollectPads *pads, GstCollectData * data1, GstClockTime timestamp1, GstCollectData * data2, GstClockTime timestamp2, gpointer user_data); /** * GstCollectPadsEventFunction: * @pads: the #GstCollectPads that trigered the callback * @pad: the #GstPad that received an event * @event: the #GstEvent received * @user_data: user data passed to gst_collect_pads_set_event_function() * * A function that will be called while processing an event. It takes * ownership of the event and is responsible for chaining up (to * gst_collect_pads_event_default()) or dropping events (such typical cases * being handled by the default handler). * * Returns: %TRUE if the pad could handle the event */ typedef gboolean (*GstCollectPadsEventFunction) (GstCollectPads *pads, GstCollectData * pad, GstEvent * event, gpointer user_data); /** * GstCollectPadsQueryFunction: * @pads: the #GstCollectPads that trigered the callback * @pad: the #GstPad that received an event * @query: the #GstEvent received * @user_data: user data passed to gst_collect_pads_set_query_function() * * A function that will be called while processing a query. It takes * ownership of the query and is responsible for chaining up (to * events downstream (with gst_pad_event_default()). * * Returns: %TRUE if the pad could handle the event */ typedef gboolean (*GstCollectPadsQueryFunction) (GstCollectPads *pads, GstCollectData * pad, GstQuery * query, gpointer user_data); /** * GstCollectPadsClipFunction: * @pads: a #GstCollectPads * @data: a #GstCollectData * @inbuffer: (transfer full): the input #GstBuffer * @outbuffer: the output #GstBuffer * @user_data: user data * * A function that will be called when @inbuffer is received on the pad managed * by @data in the collecpad object @pads. * * The function should use the segment of @data and the negotiated media type on * the pad to perform clipping of @inbuffer. * * This function takes ownership of @inbuffer and should output a buffer in * @outbuffer or return %NULL in @outbuffer if the buffer should be dropped. * * Returns: a #GstFlowReturn that corresponds to the result of clipping. */ typedef GstFlowReturn (*GstCollectPadsClipFunction) (GstCollectPads *pads, GstCollectData *data, GstBuffer *inbuffer, GstBuffer **outbuffer, gpointer user_data); /** * GstCollectPadsFlushFunction: * @pads: a #GstCollectPads * @user_data: user data * * A function that will be called while processing a flushing seek event. * * The function should flush any internal state of the element and the state of * all the pads. It should clear only the state not directly managed by the * @pads object. It is therefore not necessary to call * gst_collect_pads_set_flushing nor gst_collect_pads_clear from this function. * * Since: 1.4 */ typedef void (*GstCollectPadsFlushFunction) (GstCollectPads *pads, gpointer user_data); /** * GST_COLLECT_PADS_GET_STREAM_LOCK: * @pads: a #GstCollectPads * * Get the stream lock of @pads. The stream lock is used to coordinate and * serialize execution among the various streams being collected, and in * protecting the resources used to accomplish this. */ #define GST_COLLECT_PADS_GET_STREAM_LOCK(pads) (&((GstCollectPads *)pads)->stream_lock) /** * GST_COLLECT_PADS_STREAM_LOCK: * @pads: a #GstCollectPads * * Lock the stream lock of @pads. */ #define GST_COLLECT_PADS_STREAM_LOCK(pads) g_rec_mutex_lock(GST_COLLECT_PADS_GET_STREAM_LOCK (pads)) /** * GST_COLLECT_PADS_STREAM_UNLOCK: * @pads: a #GstCollectPads * * Unlock the stream lock of @pads. */ #define GST_COLLECT_PADS_STREAM_UNLOCK(pads) g_rec_mutex_unlock(GST_COLLECT_PADS_GET_STREAM_LOCK (pads)) /** * GstCollectPads: * @data: #GList of #GstCollectData managed by this #GstCollectPads. * * Collectpads object. */ struct _GstCollectPads { GstObject object; /*< public >*/ /* with LOCK and/or STREAM_LOCK */ GSList *data; /* list of CollectData items */ /*< private >*/ GRecMutex stream_lock; /* used to serialize collection among several streams */ GstCollectPadsPrivate *priv; gpointer _gst_reserved[GST_PADDING]; }; struct _GstCollectPadsClass { GstObjectClass parent_class; /*< private >*/ gpointer _gst_reserved[GST_PADDING]; }; GType gst_collect_pads_get_type(void); /* creating the object */ GstCollectPads* gst_collect_pads_new (void); /* set the callbacks */ void gst_collect_pads_set_function (GstCollectPads *pads, GstCollectPadsFunction func, gpointer user_data); void gst_collect_pads_set_buffer_function (GstCollectPads *pads, GstCollectPadsBufferFunction func, gpointer user_data); void gst_collect_pads_set_event_function (GstCollectPads *pads, GstCollectPadsEventFunction func, gpointer user_data); void gst_collect_pads_set_query_function (GstCollectPads *pads, GstCollectPadsQueryFunction func, gpointer user_data); void gst_collect_pads_set_compare_function (GstCollectPads *pads, GstCollectPadsCompareFunction func, gpointer user_data); void gst_collect_pads_set_clip_function (GstCollectPads *pads, GstCollectPadsClipFunction clipfunc, gpointer user_data); void gst_collect_pads_set_flush_function (GstCollectPads *pads, GstCollectPadsFlushFunction func, gpointer user_data); /* pad management */ GstCollectData* gst_collect_pads_add_pad (GstCollectPads *pads, GstPad *pad, guint size, GstCollectDataDestroyNotify destroy_notify, gboolean lock); gboolean gst_collect_pads_remove_pad (GstCollectPads *pads, GstPad *pad); /* start/stop collection */ void gst_collect_pads_start (GstCollectPads *pads); void gst_collect_pads_stop (GstCollectPads *pads); void gst_collect_pads_set_flushing (GstCollectPads *pads, gboolean flushing); /* get collected buffers */ GstBuffer* gst_collect_pads_peek (GstCollectPads *pads, GstCollectData *data); GstBuffer* gst_collect_pads_pop (GstCollectPads *pads, GstCollectData *data); /* get collected bytes */ guint gst_collect_pads_available (GstCollectPads *pads); guint gst_collect_pads_flush (GstCollectPads *pads, GstCollectData *data, guint size); GstBuffer* gst_collect_pads_read_buffer (GstCollectPads * pads, GstCollectData * data, guint size); GstBuffer* gst_collect_pads_take_buffer (GstCollectPads * pads, GstCollectData * data, guint size); /* setting and unsetting waiting mode */ void gst_collect_pads_set_waiting (GstCollectPads *pads, GstCollectData *data, gboolean waiting); /* convenience helper */ GstFlowReturn gst_collect_pads_clip_running_time (GstCollectPads * pads, GstCollectData * cdata, GstBuffer * buf, GstBuffer ** outbuf, gpointer user_data); /* default handlers */ gboolean gst_collect_pads_event_default (GstCollectPads * pads, GstCollectData * data, GstEvent * event, gboolean discard); gboolean gst_collect_pads_src_event_default (GstCollectPads * pads, GstPad * pad, GstEvent * event); gboolean gst_collect_pads_query_default (GstCollectPads * pads, GstCollectData * data, GstQuery * query, gboolean discard); G_END_DECLS #endif /* __GST_COLLECT_PADS_H__ */