/* GStreamer * Copyright (C) 2005 Wim Taymans * * gstcollect_pads.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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, 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 _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. * * Since: 0.10.12 */ typedef void (*GstCollectDataDestroyNotify) (GstCollectData *data); /** * GstCollectPadsClipFunction: * @pads: a #GstCollectPads * @data: a #GstCollectData * @buffer: a #GstBuffer * @user_data: user data * * A function that will be called when @buffer 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 @buffer. * * This function takes ownership of @buffer. * * Returns: a #GstBuffer that contains the clipped data of @buffer or NULL when * the buffer has been clipped completely. * * Since: 0.10.26 */ typedef GstBuffer * (*GstCollectPadsClipFunction) (GstCollectPads *pads, GstCollectData *data, GstBuffer *buffer, gpointer user_data); /** * 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 LOCK of @collect */ GstCollectPads *collect; GstPad *pad; GstBuffer *buffer; guint pos; GstSegment segment; gboolean flushing; gboolean new_segment; gboolean eos; gint refcount; GstCollectDataDestroyNotify destroy_notify; /*< private >*/ union { /*struct { } ABI;*/ /* adding + 0 to mark ABI change to be undone later */ gpointer _gst_reserved[GST_PADDING]; } abidata; }; /** * GstCollectPadsFunction: * @pads: the #GstCollectPads that triggered 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); #define GST_COLLECT_PADS_GET_PAD_LOCK(pads) (&((GstCollectPads *)pads)->pad_lock) #define GST_COLLECT_PADS_PAD_LOCK(pads) (g_mutex_lock(GST_COLLECT_PADS_GET_PAD_LOCK (pads))) #define GST_COLLECT_PADS_PAD_UNLOCK(pads) (g_mutex_unlock(GST_COLLECT_PADS_GET_PAD_LOCK (pads))) #define GST_COLLECT_PADS_GET_COND(pads) (&((GstCollectPads *)pads)->cond) #define GST_COLLECT_PADS_WAIT(pads) (g_cond_wait (GST_COLLECT_PADS_GET_COND (pads), GST_OBJECT_GET_LOCK (pads))) #define GST_COLLECT_PADS_SIGNAL(pads) (g_cond_signal (GST_COLLECT_PADS_GET_COND (pads))) #define GST_COLLECT_PADS_BROADCAST(pads)(g_cond_broadcast (GST_COLLECT_PADS_GET_COND (pads))) /** * GstCollectPads: * @data: #GList of #GstCollectData managed by this #GstCollectPads. * * Collectpads object. * Note that @data is only reliable for iterating the list of #GstCollectData * when inside the #GstCollectPadsFunction callback. */ struct _GstCollectPads { GstObject object; /*< public >*/ /* with LOCK */ GSList *data; /* list of CollectData items */ /*< private >*/ guint32 cookie; /* @data list cookie */ /* with LOCK */ GCond cond; /* to signal removal of data */ GstCollectPadsFunction func; /* function and user_data for callback */ gpointer user_data; guint numpads; /* number of pads in @data */ guint queuedpads; /* number of pads with a buffer */ guint eospads; /* number of pads that are EOS */ /* with LOCK and PAD_LOCK*/ gboolean started; /* with PAD_LOCK */ GMutex pad_lock; /* used to serialize add/remove */ GSList *pad_list; /* updated pad list */ guint32 pad_cookie; /* updated cookie */ GstCollectPadsPrivate *priv; /*< private >*/ union { /*struct { } ABI;*/ /* adding + 0 to mark ABI change to be undone later */ gpointer _gst_reserved[GST_PADDING]; } abidata; }; 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_clip_function (GstCollectPads *pads, GstCollectPadsClipFunction clipfunc, gpointer user_data); /* pad management */ GstCollectData* gst_collect_pads_add_pad (GstCollectPads *pads, GstPad *pad, guint size, GstCollectDataDestroyNotify destroy_notify); gboolean gst_collect_pads_remove_pad (GstCollectPads *pads, GstPad *pad); gboolean gst_collect_pads_is_active (GstCollectPads *pads, GstPad *pad); /* start/stop collection */ GstFlowReturn gst_collect_pads_collect (GstCollectPads *pads); GstFlowReturn gst_collect_pads_collect_range (GstCollectPads *pads, guint64 offset, guint length); 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); GstBuffer * gst_collect_pads_read_buffer (GstCollectPads * pads, GstCollectData * data, guint size); GstBuffer * gst_collect_pads_take_buffer (GstCollectPads * pads, GstCollectData * data, guint size); guint gst_collect_pads_flush (GstCollectPads *pads, GstCollectData *data, guint size); G_END_DECLS #endif /* __GST_COLLECT_PADS_H__ */