195 lines
6.2 KiB
C
195 lines
6.2 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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#ifndef GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS
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/* refcounting */
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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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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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#else /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
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GST_API
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GstSample * gst_sample_ref (GstSample * sample);
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GST_API
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void gst_sample_unref (GstSample * sample);
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#endif /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
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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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#ifndef GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS
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/* copy sample */
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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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#else /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
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GST_API
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GstSample * gst_sample_copy(const GstSample * buf);
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#endif /* GST_DISABLE_MINIOBJECT_INLINE_FUNCTIONS */
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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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