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/* GStreamer
* Copyright (C) 2011 Wim Taymans <wim.taymans@gmail.com>
*
* gstsample.c: media sample
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gstsample
* @short_description: A media sample
* @see_also: #GstBuffer, #GstCaps, #GstSegment
*
* A #GstSample is a small object containing data, a type, timing and
* extra arbitrary information.
*/
#include "gst_private.h"
#include "gstsample.h"
GST_DEBUG_CATEGORY_STATIC (gst_sample_debug);
#define GST_CAT_DEFAULT gst_sample_debug
struct _GstSample
{
GstMiniObject mini_object;
GstBuffer *buffer;
GstCaps *caps;
GstSegment segment;
GstStructure *info;
};
GType _gst_sample_type = 0;
GST_DEFINE_MINI_OBJECT_TYPE (GstSample, gst_sample);
void
_priv_gst_sample_initialize (void)
{
_gst_sample_type = gst_sample_get_type ();
GST_DEBUG_CATEGORY_INIT (gst_sample_debug, "sample", 0, "GstSample debug");
}
static GstSample *
_gst_sample_copy (GstSample * sample)
{
GstSample *copy;
copy = gst_sample_new (sample->buffer, sample->caps, &sample->segment,
(sample->info) ? gst_structure_copy (sample->info) : NULL);
return copy;
}
static void
_gst_sample_free (GstSample * sample)
{
GST_LOG ("free %p", sample);
if (sample->buffer)
gst_buffer_unref (sample->buffer);
if (sample->caps)
gst_caps_unref (sample->caps);
if (sample->info) {
gst_structure_set_parent_refcount (sample->info, NULL);
gst_structure_free (sample->info);
}
g_slice_free1 (sizeof (GstSample), sample);
}
/**
* gst_sample_new:
* @buffer: (transfer none) (allow-none): a #GstBuffer, or %NULL
* @caps: (transfer none) (allow-none): a #GstCaps, or %NULL
* @segment: (transfer none) (allow-none): a #GstSegment, or %NULL
* @info: (transfer full) (allow-none): a #GstStructure, or %NULL
*
* Create a new #GstSample with the provided details.
*
* Free-function: gst_sample_unref
*
* Returns: (transfer full): the new #GstSample. gst_sample_unref()
* after usage.
*/
GstSample *
gst_sample_new (GstBuffer * buffer, GstCaps * caps, const GstSegment * segment,
GstStructure * info)
{
GstSample *sample;
sample = g_slice_new0 (GstSample);
GST_LOG ("new %p", sample);
gst_mini_object_init (GST_MINI_OBJECT_CAST (sample), 0, _gst_sample_type,
(GstMiniObjectCopyFunction) _gst_sample_copy, NULL,
(GstMiniObjectFreeFunction) _gst_sample_free);
sample->buffer = buffer ? gst_buffer_ref (buffer) : NULL;
sample->caps = caps ? gst_caps_ref (caps) : NULL;
if (segment)
gst_segment_copy_into (segment, &sample->segment);
else
gst_segment_init (&sample->segment, GST_FORMAT_TIME);
if (info) {
if (!gst_structure_set_parent_refcount (info,
&sample->mini_object.refcount))
goto had_parent;
sample->info = info;
}
return sample;
/* ERRORS */
had_parent:
{
gst_sample_unref (sample);
g_warning ("structure is already owned by another object");
return NULL;
}
}
/**
* gst_sample_get_buffer:
* @sample: a #GstSample
*
* Get the buffer associated with @sample
*
* Returns: (transfer none) (nullable): the buffer of @sample or %NULL
* when there is no buffer. The buffer remains valid as long as
* @sample is valid. If you need to hold on to it for longer than
* that, take a ref to the buffer with gst_buffer_ref().
*/
GstBuffer *
gst_sample_get_buffer (GstSample * sample)
{
g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
return sample->buffer;
}
/**
* gst_sample_get_caps:
* @sample: a #GstSample
*
* Get the caps associated with @sample
*
* Returns: (transfer none) (nullable): the caps of @sample or %NULL
* when there is no caps. The caps remain valid as long as @sample is
* valid. If you need to hold on to the caps for longer than that,
* take a ref to the caps with gst_caps_ref().
*/
GstCaps *
gst_sample_get_caps (GstSample * sample)
{
g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
return sample->caps;
}
/**
* gst_sample_get_segment:
* @sample: a #GstSample
*
* Get the segment associated with @sample
*
* Returns: (transfer none): the segment of @sample.
* The segment remains valid as long as @sample is valid.
*/
GstSegment *
gst_sample_get_segment (GstSample * sample)
{
g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
return &sample->segment;
}
/**
* gst_sample_get_info:
* @sample: a #GstSample
*
* Get extra information associated with @sample.
*
* Returns: (transfer none): the extra info of @sample.
* The info remains valid as long as @sample is valid.
*/
const GstStructure *
gst_sample_get_info (GstSample * sample)
{
g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
return sample->info;
}
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