mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Add new GstTocSetter interface
This commit is contained in:
Alexander Saprykin
Stefan Sauer
parent
6e65daa4d1
commit
3f30c73443
4 changed files with 432 additions and 0 deletions
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@ -99,6 +99,7 @@ libgstreamer_@GST_MAJORMINOR@_la_SOURCES = \
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gsttask.c \
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gsttaskpool.c \
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gsttoc.c \
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gsttocsetter.c \
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$(GST_TRACE_SRC) \
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gsttypefind.c \
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gsttypefindfactory.c \
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@ -190,6 +191,7 @@ gst_headers = \
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gsttask.h \
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gsttaskpool.h \
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gsttoc.h \
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gsttocsetter.h \
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gsttrace.h \
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gsttypefind.h \
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gsttypefindfactory.h \
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@ -69,6 +69,7 @@
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#include <gst/gsttask.h>
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#include <gst/gsttaskpool.h>
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#include <gst/gsttoc.h>
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#include <gst/gsttocsetter.h>
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#include <gst/gsttrace.h>
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#include <gst/gsttypefind.h>
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#include <gst/gsttypefindfactory.h>
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362
gst/gsttocsetter.c
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362
gst/gsttocsetter.c
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@ -0,0 +1,362 @@
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/* GStreamer
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* Copyright (C) 2010, 2012 Alexander Saprykin <xelfium@gmail.com>
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*
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* gsttocsetter.c: interface for TOC setting on elements
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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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/**
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* SECTION:gsttocsetter
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* @short_description: Element interface that allows setting and retrieval
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* of the TOC
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*
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* Element interface that allows setting of the TOC.
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*
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* Elements that support some kind of chapters or editions (or tracks like in
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* the FLAC cue sheet) will implement this interface.
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*
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* If you just want to retrieve the TOC in your application then all you
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* need to do is watch for TOC messages on your pipeline's bus (or you can
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* perform TOC query). This interface is only for setting TOC data, not for
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* extracting it. To set TOC from the application, find proper tocsetter element
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* and set TOC using gst_toc_setter_set_toc().
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*
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* Elements implementing the #GstTocSetter interface can extend existing TOC
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* by getting extend UID for that (you can use gst_toc_find_entry() to retrieve it)
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* with any TOC entries received from downstream.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "gst_private.h"
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#include "gsttocsetter.h"
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#include <gobject/gvaluecollector.h>
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#include <string.h>
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GST_DEBUG_CATEGORY_STATIC (gst_toc_interface_debug);
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#define GST_CAT_DEFAULT tag_toc_interface_debug
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static GQuark gst_toc_key;
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typedef struct
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{
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GstToc *toc;
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GStaticMutex lock;
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} GstTocData;
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GType
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gst_toc_setter_get_type (void)
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{
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static volatile gsize toc_setter_type = 0;
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if (g_once_init_enter (&toc_setter_type)) {
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GType _type;
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static const GTypeInfo toc_setter_info = {
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sizeof (GstTocSetterIFace), /* class_size */
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NULL, /* base_init */
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NULL, /* base_finalize */
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NULL,
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NULL, /* class_finalize */
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NULL, /* class_data */
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0,
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0,
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NULL
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};
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GST_DEBUG_CATEGORY_INIT (gst_toc_interface_debug, "GstTocInterface", 0,
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"interfaces for the TOC");
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_type = g_type_register_static (G_TYPE_INTERFACE, "GstTocSetter",
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&toc_setter_info, 0);
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g_type_interface_add_prerequisite (_type, GST_TYPE_ELEMENT);
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gst_toc_key = g_quark_from_static_string ("GST_TOC_SETTER");
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g_once_init_leave (&toc_setter_type, _type);
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}
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return toc_setter_type;
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}
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static void
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gst_toc_data_free (gpointer p)
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{
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GstTocData *data = (GstTocData *) p;
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if (data->toc)
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gst_toc_free (data->toc);
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g_static_mutex_free (&data->lock);
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g_slice_free (GstTocData, data);
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}
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static GstTocData *
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gst_toc_setter_get_data (GstTocSetter * setter)
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{
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GstTocData *data;
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data = g_object_get_qdata (G_OBJECT (setter), gst_toc_key);
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if (!data) {
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static GStaticMutex create_mutex = G_STATIC_MUTEX_INIT;
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/* make sure no other thread is creating a GstTocData at the same time */
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g_static_mutex_lock (&create_mutex);
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data = g_object_get_qdata (G_OBJECT (setter), gst_toc_key);
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if (!data) {
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data = g_slice_new (GstTocData);
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g_static_mutex_init (&data->lock);
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data->toc = NULL;
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g_object_set_qdata_full (G_OBJECT (setter), gst_toc_key, data,
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gst_toc_data_free);
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}
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g_static_mutex_unlock (&create_mutex);
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}
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return data;
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}
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/**
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* gst_toc_setter_reset_toc:
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* @setter: a #GstTocSetter.
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*
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* Reset the internal TOC. Elements should call this from within the
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* state-change handler.
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*
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* Since: 0.10.37
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*/
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void
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gst_toc_setter_reset_toc (GstTocSetter * setter)
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{
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GstTocData *data;
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g_return_if_fail (GST_IS_TOC_SETTER (setter));
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data = gst_toc_setter_get_data (setter);
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g_static_mutex_lock (&data->lock);
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if (data->toc) {
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gst_toc_free (data->toc);
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data->toc = NULL;
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}
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g_static_mutex_unlock (&data->lock);
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}
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/**
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* gst_toc_setter_get_toc:
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* @setter: a #GstTocSetter.
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*
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* Return current TOC the setter uses. The TOC should not be
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* modified or freed.
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*
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* This function is not thread-safe. Use gst_toc_setter_get_toc_copy() instead.
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*
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* Returns: a current snapshot of the TOC used in the setter
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* or NULL if none is used.
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*
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* Since: 0.10.37
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*/
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const GstToc *
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gst_toc_setter_get_toc (GstTocSetter * setter)
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{
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g_return_val_if_fail (GST_IS_TOC_SETTER (setter), NULL);
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return gst_toc_setter_get_data (setter)->toc;
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}
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/**
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* gst_toc_setter_get_toc_copy:
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* @setter: a #GstTocSetter.
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*
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* Return current TOC the setter uses. The difference between this
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* function and gst_toc_setter_get_toc() is that this function returns deep
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* copy of the TOC, so you can modify it in any way. This function is thread-safe.
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* Free it when done with gst_toc_free().
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*
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* Returns: a copy of the current snapshot of the TOC used in the setter
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* or NULL if none is used.
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*
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* Since: 0.10.37
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*/
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GstToc *
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gst_toc_setter_get_toc_copy (GstTocSetter * setter)
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{
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GstTocData *data;
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GstToc *ret = NULL;
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g_return_val_if_fail (GST_IS_TOC_SETTER (setter), NULL);
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data = gst_toc_setter_get_data (setter);
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g_static_mutex_lock (&data->lock);
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if (data->toc != NULL)
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ret = gst_toc_copy (data->toc);
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g_static_mutex_unlock (&data->lock);
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return ret;
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}
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/**
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* gst_toc_setter_set_toc:
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* @setter: a #GstTocSetter.
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* @toc: a #GstToc to set.
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*
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* Set the given TOC on the setter. Previously setted TOC will be
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* freed before setting a new one.
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*
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* Since: 0.10.37
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*/
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void
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gst_toc_setter_set_toc (GstTocSetter * setter, const GstToc * toc)
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{
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GstTocData *data;
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g_return_if_fail (GST_IS_TOC_SETTER (setter));
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data = gst_toc_setter_get_data (setter);
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g_static_mutex_lock (&data->lock);
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if (data->toc)
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gst_toc_free (data->toc);
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data->toc = gst_toc_copy (toc);
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g_static_mutex_unlock (&data->lock);
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}
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/**
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* gst_toc_setter_get_toc_entry:
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* @setter: a #GstTocSetter.
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* @uid: UID to find entry with.
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*
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* Return #GstTocEntry (if any) with given @uid. Returned entry should
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* not be modified or freed.
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*
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* This function is not thread-safe. Use gst_toc_setter_get_toc_entry_copy() instead.
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*
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* Returns: a TOC entry with given @uid from the TOC in the setter
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* or NULL if none entry with such @uid was found.
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*
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* Since: 0.10.37
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*/
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const GstTocEntry *
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gst_toc_setter_get_toc_entry (GstTocSetter * setter, const gchar * uid)
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{
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GstTocData *data;
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const GstTocEntry *ret;
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g_return_val_if_fail (GST_IS_TOC_SETTER (setter), NULL);
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g_return_val_if_fail (uid != NULL, NULL);
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data = gst_toc_setter_get_data (setter);
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g_static_mutex_lock (&data->lock);
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ret = gst_toc_find_entry (data->toc, uid);
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g_static_mutex_unlock (&data->lock);
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return ret;
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}
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/**
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* gst_toc_setter_get_toc_entry_copy:
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* @setter: a #GstTocSetter.
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* @uid: UID to find entry with.
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*
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* Return #GstTocEntry (if any) with given @uid. It perform a deep copying,
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* so you can modify returned value. Free it when done with gst_toc_entry_free().
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* This function is thread-safe.
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*
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* Returns: a TOC entry with given @uid from the TOC in the setter
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* or NULL if none entry with such @uid was found.
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*
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* Since: 0.10.37
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*/
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GstTocEntry *
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gst_toc_setter_get_toc_entry_copy (GstTocSetter * setter, const gchar * uid)
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{
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GstTocData *data;
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GstTocEntry *ret = NULL;
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const GstTocEntry *search;
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g_return_val_if_fail (GST_IS_TOC_SETTER (setter), NULL);
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g_return_val_if_fail (uid != NULL, NULL);
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data = gst_toc_setter_get_data (setter);
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g_static_mutex_lock (&data->lock);
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search = gst_toc_find_entry (data->toc, uid);
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if (search != NULL)
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ret = gst_toc_entry_copy (search);
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g_static_mutex_unlock (&data->lock);
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return ret;
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}
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/**
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* gst_toc_setter_add_toc_entry:
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* @setter: a #GstTocSetter.
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* @parent_uid: UID of the parent entry to append given @entry. Use 0 for the TOC root level.
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* @entry: #GstTocEntry to append.
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*
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* Try to find entry with given @parent_uid and append an @entry to that #GstTocEntry.
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*
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* Returns: TRUE if entry with @parent_uid was found, FALSE otherwise.
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*
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* Since: 0.10.37
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*/
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gboolean
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gst_toc_setter_add_toc_entry (GstTocSetter * setter, const gchar * parent_uid,
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const GstTocEntry * entry)
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{
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GstTocData *data;
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GstTocEntry *parent;
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GstTocEntry *copy_entry;
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gboolean ret = FALSE;
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g_return_val_if_fail (GST_IS_TOC_SETTER (setter), FALSE);
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g_return_val_if_fail (parent_uid != NULL, FALSE);
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g_return_val_if_fail (entry != NULL, FALSE);
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data = gst_toc_setter_get_data (setter);
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g_static_mutex_lock (&data->lock);
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copy_entry = gst_toc_entry_copy (entry);
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if (g_strcmp0 (parent_uid, "0") == 0)
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data->toc->entries = g_list_append (data->toc->entries, copy_entry);
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else {
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parent = gst_toc_find_entry (data->toc, parent_uid);
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if (parent != NULL) {
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parent->subentries = g_list_append (parent->subentries, copy_entry);
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ret = TRUE;
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}
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}
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g_static_mutex_unlock (&data->lock);
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return ret;
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}
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67
gst/gsttocsetter.h
Normal file
67
gst/gsttocsetter.h
Normal file
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@ -0,0 +1,67 @@
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/* GStreamer
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* Copyright (C) 2010, 2012 Alexander Saprykin <xelfium@gmail.com>
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*
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* gsttocsetter.h: Interfaces for TOC
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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_TOC_SETTER_H__
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#define __GST_TOC_SETTER_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_TOC_SETTER (gst_toc_setter_get_type ())
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#define GST_TOC_SETTER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_TOC_SETTER, GstTocSetter))
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#define GST_IS_TOC_SETTER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_TOC_SETTER))
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#define GST_TOC_SETTER_GET_IFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), GST_TYPE_TOC_SETTER, GstTocSetterIFace))
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/**
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* GstTocSetter:
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*
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* Opaque #GstTocSetter data structure.
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*/
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typedef struct _GstTocSetter GstTocSetter;
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typedef struct _GstTocSetterIFace GstTocSetterIFace;
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/**
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* GstTocSetterIFace:
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* @g_iface: parent interface type.
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*
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* #GstTocSetterIFace interface.
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*/
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struct _GstTocSetterIFace
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{
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GTypeInterface g_iface;
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/* signals */
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/* virtual table */
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};
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GType gst_toc_setter_get_type (void);
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void gst_toc_setter_reset_toc (GstTocSetter *setter);
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const GstToc * gst_toc_setter_get_toc (GstTocSetter *setter);
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GstToc * gst_toc_setter_get_toc_copy (GstTocSetter *setter);
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void gst_toc_setter_set_toc (GstTocSetter *setter, const GstToc *toc);
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const GstTocEntry * gst_toc_setter_get_toc_entry (GstTocSetter *setter, const gchar *uid);
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GstTocEntry * gst_toc_setter_get_toc_entry_copy (GstTocSetter *setter, const gchar *uid);
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gboolean gst_toc_setter_add_toc_entry (GstTocSetter *setter, const gchar *parent_uid, const GstTocEntry *entry);
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||||
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||||
G_END_DECLS
|
||||
#endif /* __GST_TOC_SETTER_H__ */
|
||||
|
||||
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Reference in a new issue