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09141c6e1f
Since we started depending on GLib 2.44, we can be sure this macro is defined (it will be a no-op on compilers that don't support it). For plugins we should just start using `G_DECLARE_FINAL_TYPE` which means we no longer need the macro there, but for most types in core we don't want to break ABI, which means it's better to just keep it like it is (and use the `#ifdef` instead).
211 lines
6.5 KiB
C
211 lines
6.5 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstsample.h: Header for GstSample object
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_SAMPLE_H__
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#define __GST_SAMPLE_H__
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#include <gst/gstbuffer.h>
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#include <gst/gstbufferlist.h>
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#include <gst/gstcaps.h>
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#include <gst/gstsegment.h>
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G_BEGIN_DECLS
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GST_API GType _gst_sample_type;
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#define GST_TYPE_SAMPLE (_gst_sample_type)
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#define GST_IS_SAMPLE(obj) (GST_IS_MINI_OBJECT_TYPE(obj, GST_TYPE_SAMPLE))
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#define GST_SAMPLE_CAST(obj) ((GstSample *)obj)
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#define GST_SAMPLE(obj) (GST_SAMPLE_CAST(obj))
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/**
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* GstSample:
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*
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* The opaque structure of a #GstSample. A sample contains a typed memory
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* block and the associated timing information. It is mainly used to
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* exchange buffers with an application.
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*/
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typedef struct _GstSample GstSample;
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GST_API
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GType gst_sample_get_type (void);
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/* allocation */
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GST_API
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GstSample * gst_sample_new (GstBuffer *buffer,
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GstCaps *caps,
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const GstSegment *segment,
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GstStructure *info);
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GST_API
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GstBuffer * gst_sample_get_buffer (GstSample *sample);
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GST_API
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GstCaps * gst_sample_get_caps (GstSample *sample);
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GST_API
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GstSegment * gst_sample_get_segment (GstSample *sample);
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GST_API
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const GstStructure * gst_sample_get_info (GstSample *sample);
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GST_API
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GstBufferList * gst_sample_get_buffer_list (GstSample *sample);
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GST_API
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void gst_sample_set_buffer_list (GstSample *sample, GstBufferList *buffer_list);
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GST_API
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void gst_sample_set_buffer (GstSample *sample, GstBuffer *buffer);
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GST_API
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void gst_sample_set_caps (GstSample *sample, GstCaps *caps);
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GST_API
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void gst_sample_set_segment (GstSample * sample, const GstSegment *segment);
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GST_API
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gboolean gst_sample_set_info (GstSample *sample, GstStructure *info);
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/* refcounting */
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/**
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* gst_sample_ref: (skip)
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* @sample: a #GstSample
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*
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* Increases the refcount of the given sample by one.
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*
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* Returns: (transfer full): @sample
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*/
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static inline GstSample* gst_sample_ref(GstSample* sample);
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static inline GstSample *
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gst_sample_ref (GstSample * sample)
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{
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return GST_SAMPLE_CAST (gst_mini_object_ref (GST_MINI_OBJECT_CAST (
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sample)));
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}
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/**
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* gst_sample_unref: (skip)
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* @sample: (transfer full): a #GstSample
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*
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* Decreases the refcount of the sample. If the refcount reaches 0, the
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* sample will be freed.
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*/
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static inline void gst_sample_unref(GstSample* sample);
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static inline void
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gst_sample_unref (GstSample * sample)
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{
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gst_mini_object_unref (GST_MINI_OBJECT_CAST (sample));
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}
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/**
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* gst_sample_is_writable:
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* @sample: A #GstSample
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*
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* Tests if you can safely set the buffer and / or buffer list of @sample.
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*
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* Since: 1.16
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*/
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#define gst_sample_is_writable(sample) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (sample))
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/**
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* gst_sample_make_writable:
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* @sample: (transfer full): A #GstSample
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*
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* Returns a writable copy of @sample. If the source sample is
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* already writable, this will simply return the same sample.
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*
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* Use this function to ensure that a sample can be safely modified before
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* making changes to it, for example before calling gst_sample_set_buffer()
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*
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* If the reference count of the source sample @sample is exactly one, the caller
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* is the sole owner and this function will return the sample object unchanged.
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*
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* If there is more than one reference on the object, a copy will be made using
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* gst_sample_copy(). The passed-in @sample will be unreffed in that case, and the
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* caller will now own a reference to the new returned sample object.
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*
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* In short, this function unrefs the sample in the argument and refs the sample
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* that it returns. Don't access the argument after calling this function unless
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* you have an additional reference to it.
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*
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* Returns: (transfer full): a writable sample which may or may not be the
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* same as @sample
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*
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* Since: 1.16
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*/
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#define gst_sample_make_writable(sample) GST_SAMPLE_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (sample)))
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/* copy sample */
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/**
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* gst_sample_copy: (skip)
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* @buf: a #GstSample.
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*
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* Create a copy of the given sample. This will also make a newly allocated
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* copy of the data the source sample contains.
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*
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* Returns: (transfer full): a new copy of @buf.
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*
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* Since: 1.2
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*/
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static inline GstSample* gst_sample_copy(const GstSample* buf);
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static inline GstSample *
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gst_sample_copy (const GstSample * buf)
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{
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return GST_SAMPLE_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (buf)));
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}
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/**
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* gst_value_set_sample:
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* @v: a #GValue to receive the data
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* @b: (transfer none): a #GstSample to assign to the GstValue
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*
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* Sets @b as the value of @v. Caller retains reference to sample.
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*/
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#define gst_value_set_sample(v,b) g_value_set_boxed((v),(b))
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/**
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* gst_value_take_sample:
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* @v: a #GValue to receive the data
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* @b: (transfer full): a #GstSample to assign to the GstValue
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*
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* Sets @b as the value of @v. Caller gives away reference to sample.
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*/
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#define gst_value_take_sample(v,b) g_value_take_boxed(v,(b))
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/**
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* gst_value_get_sample:
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* @v: a #GValue to query
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*
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* Receives a #GstSample as the value of @v. Does not return a reference to
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* the sample, so the pointer is only valid for as long as the caller owns
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* a reference to @v.
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*
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* Returns: (transfer none): sample
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*/
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#define gst_value_get_sample(v) GST_SAMPLE_CAST (g_value_get_boxed(v))
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstSample, gst_sample_unref)
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G_END_DECLS
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#endif /* __GST_SAMPLE_H__ */
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