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Move the locking methods from GstMemory to GstMiniObject. Add a miniobject flag to enable LOCKABLE objects. LOCKABLE objects can use the lock/unlock API to control the access to the object. Add a minobject flag that allows you to lock an object in readonly mode. Modify the _is_writable() method to check the shared counter for LOCKABLE objects. This allows us to control writability separately from the refcount for LOCKABLE objects.
202 lines
4.8 KiB
C
202 lines
4.8 KiB
C
/* GStreamer
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* Copyright (C) 2011 Wim Taymans <wim.taymans@gmail.com>
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*
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* gstsample.c: media sample
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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:gstsample
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* @short_description: A media sample
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* @see_also: #GstBuffer, #GstCaps, #GstSegment
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*
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* A #GstSample is a small object containing data, a type, timing and
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* extra arbitrary information.
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*
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* Last reviewed on 2012-03-29 (0.11.3)
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*/
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#include "gst_private.h"
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#include "gstsample.h"
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struct _GstSample
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{
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GstMiniObject mini_object;
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GstBuffer *buffer;
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GstCaps *caps;
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GstSegment segment;
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GstStructure *info;
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};
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GType _gst_sample_type = 0;
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GST_DEFINE_MINI_OBJECT_TYPE (GstSample, gst_sample);
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void
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_priv_gst_sample_initialize (void)
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{
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_gst_sample_type = gst_sample_get_type ();
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}
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static GstSample *
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_gst_sample_copy (GstSample * sample)
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{
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GstSample *copy;
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copy = gst_sample_new (sample->buffer, sample->caps, &sample->segment,
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gst_structure_copy (sample->info));
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return copy;
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}
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static void
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_gst_sample_free (GstSample * sample)
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{
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GST_LOG ("free %p", sample);
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if (sample->buffer)
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gst_buffer_unref (sample->buffer);
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if (sample->caps)
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gst_caps_unref (sample->caps);
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g_slice_free1 (sizeof (GstSample), sample);
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}
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/**
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* gst_sample_new:
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* @buffer: (transfer none) (allow-none): a #GstBuffer, or NULL
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* @caps: (transfer none) (allow-none): a #GstCaps, or NULL
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* @segment: transfer none) (allow-none): a #GstSegment, or NULL
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* @info: (transfer full) (allow-none): a #GstStructure, or NULL
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*
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* Create a new #GstSample with the provided details.
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*
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* Free-function: gst_sample_unref
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*
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* Returns: (transfer full): the new #GstSample. gst_sample_unref()
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* after usage.
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*
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* Since: 0.10.24
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*/
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GstSample *
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gst_sample_new (GstBuffer * buffer, GstCaps * caps, const GstSegment * segment,
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GstStructure * info)
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{
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GstSample *sample;
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sample = g_slice_new0 (GstSample);
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GST_LOG ("new %p", sample);
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gst_mini_object_init (GST_MINI_OBJECT_CAST (sample), 0, _gst_sample_type,
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(GstMiniObjectCopyFunction) _gst_sample_copy, NULL,
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(GstMiniObjectFreeFunction) _gst_sample_free);
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sample->buffer = buffer ? gst_buffer_ref (buffer) : NULL;
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sample->caps = caps ? gst_caps_ref (caps) : NULL;
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if (segment)
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gst_segment_copy_into (segment, &sample->segment);
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else
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gst_segment_init (&sample->segment, GST_FORMAT_TIME);
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if (info) {
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if (!gst_structure_set_parent_refcount (info,
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&sample->mini_object.refcount))
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goto had_parent;
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sample->info = info;
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}
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return sample;
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/* ERRORS */
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had_parent:
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{
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gst_sample_unref (sample);
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g_warning ("structure is already owned by another object");
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return NULL;
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}
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}
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/**
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* gst_sample_get_buffer:
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* @sample: a #GstSample
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*
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* Get the buffer associated with @sample
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*
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* Returns: (transfer none): the buffer of @sample or NULL when there
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* is no buffer. The buffer remains valid as long as @sample is valid.
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*/
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GstBuffer *
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gst_sample_get_buffer (GstSample * sample)
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{
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g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
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return sample->buffer;
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}
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/**
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* gst_sample_get_caps:
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* @sample: a #GstSample
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*
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* Get the caps associated with @sample
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*
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* Returns: (transfer none): the caps of @sample or NULL when there
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* is no caps. The caps remain valid as long as @sample is valid.
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*/
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GstCaps *
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gst_sample_get_caps (GstSample * sample)
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{
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g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
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return sample->caps;
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}
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/**
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* gst_sample_get_segment:
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* @sample: a #GstSample
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*
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* Get the segment associated with @sample
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*
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* Returns: (transfer none): the segment of @sample.
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* The segment remains valid as long as @sample is valid.
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*/
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GstSegment *
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gst_sample_get_segment (GstSample * sample)
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{
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g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
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return &sample->segment;
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}
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/**
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* gst_sample_get_info:
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* @sample: a #GstSample
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*
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* Get extra information associated with @sample.
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*
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* Returns: (transfer none): the extra info of @sample.
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* The info remains valid as long as @sample is valid.
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*/
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const GstStructure *
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gst_sample_get_info (GstSample * sample)
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{
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g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
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return sample->info;
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}
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