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223 lines
8.5 KiB
C
223 lines
8.5 KiB
C
/* GStreamer
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* Copyright (C) 2005 Wim Taymans <wim@fluendo.com>
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*
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* gstcollect_pads.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 _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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* Since: 0.10.12
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*/
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typedef void (*GstCollectDataDestroyNotify) (GstCollectData *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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* @buffer: a #GstBuffer
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* @user_data: user data
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*
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* A function that will be called when @buffer 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 @buffer.
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*
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* This function takes ownership of @buffer.
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*
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* Returns: a #GstBuffer that contains the clipped data of @buffer or NULL when
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* the buffer has been clipped completely.
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*
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* Since: 0.10.26
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*/
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typedef GstBuffer * (*GstCollectPadsClipFunction) (GstCollectPads *pads, GstCollectData *data,
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GstBuffer *buffer, gpointer user_data);
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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 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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union {
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struct {
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gboolean flushing;
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gboolean new_segment;
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gboolean eos;
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gint refcount;
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} ABI;
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/* adding + 0 to mark ABI change to be undone later */
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gpointer _gst_reserved[GST_PADDING + 0];
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} abidata;
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};
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/**
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* GstCollectPadsFunction:
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* @pads: the #GstCollectPads that triggered 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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#define GST_COLLECT_PADS_GET_PAD_LOCK(pads) (((GstCollectPads *)pads)->abidata.ABI.pad_lock)
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#define GST_COLLECT_PADS_PAD_LOCK(pads) (g_mutex_lock(GST_COLLECT_PADS_GET_PAD_LOCK (pads)))
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#define GST_COLLECT_PADS_PAD_UNLOCK(pads) (g_mutex_unlock(GST_COLLECT_PADS_GET_PAD_LOCK (pads)))
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#define GST_COLLECT_PADS_GET_COND(pads) (((GstCollectPads *)pads)->cond)
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#define GST_COLLECT_PADS_WAIT(pads) (g_cond_wait (GST_COLLECT_PADS_GET_COND (pads), GST_OBJECT_GET_LOCK (pads)))
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#define GST_COLLECT_PADS_SIGNAL(pads) (g_cond_signal (GST_COLLECT_PADS_GET_COND (pads)))
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#define GST_COLLECT_PADS_BROADCAST(pads)(g_cond_broadcast (GST_COLLECT_PADS_GET_COND (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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* Note that @data doesn't contain the complete #GstCollectData list
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* at all times and should not be used for iterating them.
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*/
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struct _GstCollectPads {
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GstObject object;
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/*< public >*/ /* with LOCK */
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GSList *data; /* list of CollectData items */
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/*< private >*/
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guint32 cookie; /* @data list cookie */
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/* with LOCK */
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GCond *cond; /* to signal removal of data */
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GstCollectPadsFunction func; /* function and user_data for callback */
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gpointer user_data;
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guint numpads; /* number of pads in @data */
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guint queuedpads; /* number of pads with a buffer */
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guint eospads; /* number of pads that are EOS */
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/* with LOCK and PAD_LOCK*/
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gboolean started;
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/*< private >*/
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union {
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struct {
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/* since 0.10.6 */ /* with PAD_LOCK */
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GMutex *pad_lock; /* used to serialize add/remove */
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GSList *pad_list; /* updated pad list */
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guint32 pad_cookie; /* updated cookie */
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GstCollectPadsPrivate *priv;
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} ABI;
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/* adding + 0 to mark ABI change to be undone later */
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gpointer _gst_reserved[GST_PADDING + 0];
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} abidata;
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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, GstCollectPadsFunction func,
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gpointer user_data);
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void gst_collect_pads_set_clip_function (GstCollectPads *pads, 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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GstCollectData* gst_collect_pads_add_pad_full (GstCollectPads *pads, GstPad *pad, guint size, GstCollectDataDestroyNotify destroy_notify);
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gboolean gst_collect_pads_remove_pad (GstCollectPads *pads, GstPad *pad);
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gboolean gst_collect_pads_is_active (GstCollectPads *pads, GstPad *pad);
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/* start/stop collection */
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GstFlowReturn gst_collect_pads_collect (GstCollectPads *pads);
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GstFlowReturn gst_collect_pads_collect_range (GstCollectPads *pads, guint64 offset, guint length);
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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_read (GstCollectPads *pads, GstCollectData *data,
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guint8 **bytes, 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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guint gst_collect_pads_flush (GstCollectPads *pads, GstCollectData *data,
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guint size);
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G_END_DECLS
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#endif /* __GST_COLLECT_PADS_H__ */
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