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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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434 lines
11 KiB
C
434 lines
11 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gstsample
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* @title: 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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#include "gst_private.h"
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#include "gstsample.h"
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GST_DEBUG_CATEGORY_STATIC (gst_sample_debug);
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#define GST_CAT_DEFAULT gst_sample_debug
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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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GstBufferList *buffer_list;
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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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GST_DEBUG_CATEGORY_INIT (gst_sample_debug, "sample", 0, "GstSample debug");
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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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(sample->info) ? gst_structure_copy (sample->info) : NULL);
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if (sample->buffer_list) {
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copy->buffer_list = gst_buffer_list_ref (sample->buffer_list);
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gst_mini_object_add_parent (GST_MINI_OBJECT_CAST (copy->buffer_list),
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GST_MINI_OBJECT_CAST (copy));
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}
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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_mini_object_remove_parent (GST_MINI_OBJECT_CAST (sample->buffer),
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GST_MINI_OBJECT_CAST (sample));
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gst_buffer_unref (sample->buffer);
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}
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if (sample->caps) {
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gst_mini_object_remove_parent (GST_MINI_OBJECT_CAST (sample->caps),
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GST_MINI_OBJECT_CAST (sample));
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gst_caps_unref (sample->caps);
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}
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if (sample->info) {
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gst_structure_set_parent_refcount (sample->info, NULL);
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gst_structure_free (sample->info);
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}
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if (sample->buffer_list) {
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gst_mini_object_remove_parent (GST_MINI_OBJECT_CAST (sample->buffer_list),
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GST_MINI_OBJECT_CAST (sample));
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gst_buffer_list_unref (sample->buffer_list);
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}
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#ifdef USE_POISONING
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memset (sample, 0xff, sizeof (GstSample));
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#endif
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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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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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if (buffer) {
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sample->buffer = gst_buffer_ref (buffer);
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gst_mini_object_add_parent (GST_MINI_OBJECT_CAST (sample->buffer),
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GST_MINI_OBJECT_CAST (sample));
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}
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if (caps) {
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sample->caps = gst_caps_ref (caps);
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gst_mini_object_add_parent (GST_MINI_OBJECT_CAST (sample->caps),
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GST_MINI_OBJECT_CAST (sample));
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}
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/* FIXME 2.0: initialize with GST_FORMAT_UNDEFINED by default */
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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) (nullable): the buffer of @sample or %NULL
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* when there is no buffer. The buffer remains valid as long as
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* @sample is valid. If you need to hold on to it for longer than
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* that, take a ref to the buffer with gst_buffer_ref().
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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) (nullable): the caps of @sample or %NULL
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* when there is no caps. The caps remain valid as long as @sample is
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* valid. If you need to hold on to the caps for longer than that,
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* take a ref to the caps with gst_caps_ref().
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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) (nullable): 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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/**
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* gst_sample_get_buffer_list:
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* @sample: a #GstSample
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*
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* Get the buffer list associated with @sample
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*
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* Returns: (transfer none) (nullable): the buffer list of @sample or %NULL
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* when there is no buffer list. The buffer list remains valid as long as
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* @sample is valid. If you need to hold on to it for longer than
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* that, take a ref to the buffer list with gst_mini_object_ref ().
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*
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* Since: 1.6
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*/
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GstBufferList *
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gst_sample_get_buffer_list (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_list;
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}
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/**
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* gst_sample_set_buffer_list:
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* @sample: a #GstSample
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* @buffer_list: a #GstBufferList
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*
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* Set the buffer list associated with @sample. @sample must be writable.
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*
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* Since: 1.6
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*/
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void
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gst_sample_set_buffer_list (GstSample * sample, GstBufferList * buffer_list)
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{
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GstBufferList *old = NULL;
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g_return_if_fail (GST_IS_SAMPLE (sample));
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g_return_if_fail (gst_sample_is_writable (sample));
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old = sample->buffer_list;
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if (old == buffer_list)
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return;
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if (buffer_list) {
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sample->buffer_list = gst_buffer_list_ref (buffer_list);
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gst_mini_object_add_parent (GST_MINI_OBJECT_CAST (sample->buffer_list),
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GST_MINI_OBJECT_CAST (sample));
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} else {
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sample->buffer_list = NULL;
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}
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if (old) {
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gst_mini_object_remove_parent (GST_MINI_OBJECT_CAST (old),
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GST_MINI_OBJECT_CAST (sample));
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gst_buffer_list_unref (old);
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}
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}
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/**
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* gst_sample_set_buffer:
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* @sample: A #GstSample
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* @buffer: (transfer none): A #GstBuffer
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*
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* Set the buffer associated with @sample. @sample must be writable.
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*
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* Since: 1.16
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*/
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void
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gst_sample_set_buffer (GstSample * sample, GstBuffer * buffer)
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{
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GstBuffer *old = NULL;
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g_return_if_fail (GST_IS_SAMPLE (sample));
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g_return_if_fail (gst_sample_is_writable (sample));
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old = sample->buffer;
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if (old == buffer)
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return;
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if (buffer) {
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sample->buffer = gst_buffer_ref (buffer);
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gst_mini_object_add_parent (GST_MINI_OBJECT_CAST (sample->buffer),
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GST_MINI_OBJECT_CAST (sample));
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} else {
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sample->buffer = NULL;
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}
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if (old) {
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gst_mini_object_remove_parent (GST_MINI_OBJECT_CAST (old),
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GST_MINI_OBJECT_CAST (sample));
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gst_buffer_unref (old);
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}
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}
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/**
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* gst_sample_set_caps:
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* @sample: A #GstSample
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* @caps: (transfer none): A #GstCaps
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*
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* Set the caps associated with @sample. @sample must be writable.
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*
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* Since: 1.16
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*/
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void
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gst_sample_set_caps (GstSample * sample, GstCaps * caps)
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{
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GstCaps *old = NULL;
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g_return_if_fail (GST_IS_SAMPLE (sample));
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g_return_if_fail (gst_sample_is_writable (sample));
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old = sample->caps;
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if (old == caps)
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return;
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if (caps) {
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sample->caps = gst_caps_ref (caps);
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gst_mini_object_add_parent (GST_MINI_OBJECT_CAST (sample->caps),
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GST_MINI_OBJECT_CAST (sample));
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} else {
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sample->caps = NULL;
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}
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if (old) {
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gst_mini_object_remove_parent (GST_MINI_OBJECT_CAST (old),
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GST_MINI_OBJECT_CAST (sample));
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gst_caps_unref (old);
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}
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}
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/**
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* gst_sample_set_segment:
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* @sample: A #GstSample
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* @segment: (transfer none): A #GstSegment
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*
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* Set the segment associated with @sample. @sample must be writable.
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*
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* Since: 1.16
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*/
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void
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gst_sample_set_segment (GstSample * sample, const GstSegment * segment)
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{
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g_return_if_fail (GST_IS_SAMPLE (sample));
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g_return_if_fail (gst_sample_is_writable (sample));
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/* FIXME 2.0: initialize with GST_FORMAT_UNDEFINED by default */
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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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}
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/**
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* gst_sample_set_info:
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* @sample: A #GstSample
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* @info: (transfer full): A #GstStructure
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*
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* Set the info structure associated with @sample. @sample must be writable,
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* and @info must not have a parent set already.
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*
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* Since: 1.16
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*/
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gboolean
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gst_sample_set_info (GstSample * sample, GstStructure * info)
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{
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g_return_val_if_fail (GST_IS_SAMPLE (sample), FALSE);
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g_return_val_if_fail (gst_sample_is_writable (sample), FALSE);
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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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}
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if (sample->info) {
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gst_structure_set_parent_refcount (sample->info, NULL);
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gst_structure_free (sample->info);
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}
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sample->info = info;
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return TRUE;
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had_parent:
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g_warning ("structure is already owned by another object");
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return FALSE;
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}
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