2 * Copyright (C) 2011 Wim Taymans <wim.taymans@gmail.com>
4 * gstsample.c: media sample
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
25 * @short_description: A media sample
26 * @see_also: #GstBuffer, #GstCaps, #GstSegment
28 * A #GstSample is a small object containing data, a type, timing and
29 * extra arbitrary information.
31 #include "gst_private.h"
33 #include "gstsample.h"
35 GST_DEBUG_CATEGORY_STATIC (gst_sample_debug);
36 #define GST_CAT_DEFAULT gst_sample_debug
40 GstMiniObject mini_object;
46 GstBufferList *buffer_list;
49 GType _gst_sample_type = 0;
51 GST_DEFINE_MINI_OBJECT_TYPE (GstSample, gst_sample);
54 _priv_gst_sample_initialize (void)
56 _gst_sample_type = gst_sample_get_type ();
58 GST_DEBUG_CATEGORY_INIT (gst_sample_debug, "sample", 0, "GstSample debug");
62 _gst_sample_copy (GstSample * sample)
66 copy = gst_sample_new (sample->buffer, sample->caps, &sample->segment,
67 (sample->info) ? gst_structure_copy (sample->info) : NULL);
69 if (sample->buffer_list)
70 copy->buffer_list = (GstBufferList *)
71 gst_mini_object_ref (GST_MINI_OBJECT_CAST (sample->buffer_list));
77 _gst_sample_free (GstSample * sample)
79 GST_LOG ("free %p", sample);
82 gst_buffer_unref (sample->buffer);
84 gst_caps_unref (sample->caps);
86 gst_structure_set_parent_refcount (sample->info, NULL);
87 gst_structure_free (sample->info);
89 if (sample->buffer_list)
90 gst_mini_object_unref (GST_MINI_OBJECT_CAST (sample->buffer_list));
92 g_slice_free1 (sizeof (GstSample), sample);
97 * @buffer: (transfer none) (allow-none): a #GstBuffer, or %NULL
98 * @caps: (transfer none) (allow-none): a #GstCaps, or %NULL
99 * @segment: (transfer none) (allow-none): a #GstSegment, or %NULL
100 * @info: (transfer full) (allow-none): a #GstStructure, or %NULL
102 * Create a new #GstSample with the provided details.
104 * Free-function: gst_sample_unref
106 * Returns: (transfer full): the new #GstSample. gst_sample_unref()
110 gst_sample_new (GstBuffer * buffer, GstCaps * caps, const GstSegment * segment,
115 sample = g_slice_new0 (GstSample);
117 GST_LOG ("new %p", sample);
119 gst_mini_object_init (GST_MINI_OBJECT_CAST (sample), 0, _gst_sample_type,
120 (GstMiniObjectCopyFunction) _gst_sample_copy, NULL,
121 (GstMiniObjectFreeFunction) _gst_sample_free);
123 sample->buffer = buffer ? gst_buffer_ref (buffer) : NULL;
124 sample->caps = caps ? gst_caps_ref (caps) : NULL;
126 /* FIXME 2.0: initialize with GST_FORMAT_UNDEFINED by default */
128 gst_segment_copy_into (segment, &sample->segment);
130 gst_segment_init (&sample->segment, GST_FORMAT_TIME);
133 if (!gst_structure_set_parent_refcount (info,
134 &sample->mini_object.refcount))
144 gst_sample_unref (sample);
145 g_warning ("structure is already owned by another object");
151 * gst_sample_get_buffer:
152 * @sample: a #GstSample
154 * Get the buffer associated with @sample
156 * Returns: (transfer none) (nullable): the buffer of @sample or %NULL
157 * when there is no buffer. The buffer remains valid as long as
158 * @sample is valid. If you need to hold on to it for longer than
159 * that, take a ref to the buffer with gst_buffer_ref().
162 gst_sample_get_buffer (GstSample * sample)
164 g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
166 return sample->buffer;
170 * gst_sample_get_caps:
171 * @sample: a #GstSample
173 * Get the caps associated with @sample
175 * Returns: (transfer none) (nullable): the caps of @sample or %NULL
176 * when there is no caps. The caps remain valid as long as @sample is
177 * valid. If you need to hold on to the caps for longer than that,
178 * take a ref to the caps with gst_caps_ref().
181 gst_sample_get_caps (GstSample * sample)
183 g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
189 * gst_sample_get_segment:
190 * @sample: a #GstSample
192 * Get the segment associated with @sample
194 * Returns: (transfer none): the segment of @sample.
195 * The segment remains valid as long as @sample is valid.
198 gst_sample_get_segment (GstSample * sample)
200 g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
202 return &sample->segment;
206 * gst_sample_get_info:
207 * @sample: a #GstSample
209 * Get extra information associated with @sample.
211 * Returns: (transfer none) (nullable): the extra info of @sample.
212 * The info remains valid as long as @sample is valid.
215 gst_sample_get_info (GstSample * sample)
217 g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
223 * gst_sample_get_buffer_list:
224 * @sample: a #GstSample
226 * Get the buffer list associated with @sample
228 * Returns: (transfer none) (nullable): the buffer list of @sample or %NULL
229 * when there is no buffer list. The buffer list remains valid as long as
230 * @sample is valid. If you need to hold on to it for longer than
231 * that, take a ref to the buffer list with gst_mini_object_ref ().
236 gst_sample_get_buffer_list (GstSample * sample)
238 g_return_val_if_fail (GST_IS_SAMPLE (sample), NULL);
240 return sample->buffer_list;
244 * gst_sample_set_buffer_list:
245 * @sample: a #GstSample
246 * @buffer_list: a #GstBufferList
248 * Set the buffer list associated with @sample. @sample must be writable.
253 gst_sample_set_buffer_list (GstSample * sample, GstBufferList * buffer_list)
255 GstBufferList *old = NULL;
256 g_return_if_fail (GST_IS_SAMPLE (sample));
257 g_return_if_fail (gst_sample_is_writable (sample));
259 old = sample->buffer_list;
260 sample->buffer_list = buffer_list ? (GstBufferList *)
261 gst_mini_object_ref (GST_MINI_OBJECT_CAST (buffer_list)) : NULL;
264 gst_mini_object_unref (GST_MINI_OBJECT_CAST (old));
268 * gst_sample_set_buffer:
269 * @sample: A #GstSample
270 * @buffer: (transfer none): A #GstBuffer
272 * Set the buffer associated with @sample. @sample must be writable.
277 gst_sample_set_buffer (GstSample * sample, GstBuffer * buffer)
279 g_return_if_fail (GST_IS_SAMPLE (sample));
280 g_return_if_fail (gst_sample_is_writable (sample));
282 gst_buffer_replace (&sample->buffer, buffer);
286 * gst_sample_set_caps:
287 * @sample: A #GstSample
288 * @caps: (transfer none): A #GstCaps
290 * Set the caps associated with @sample. @sample must be writable.
295 gst_sample_set_caps (GstSample * sample, GstCaps * caps)
297 g_return_if_fail (GST_IS_SAMPLE (sample));
298 g_return_if_fail (gst_sample_is_writable (sample));
300 gst_caps_replace (&sample->caps, caps);
304 * gst_sample_set_segment:
305 * @sample: A #GstSample
306 * @segment: (transfer none): A #GstSegment
308 * Set the segment associated with @sample. @sample must be writable.
313 gst_sample_set_segment (GstSample * sample, const GstSegment * segment)
315 g_return_if_fail (GST_IS_SAMPLE (sample));
316 g_return_if_fail (gst_sample_is_writable (sample));
318 /* FIXME 2.0: initialize with GST_FORMAT_UNDEFINED by default */
320 gst_segment_copy_into (segment, &sample->segment);
322 gst_segment_init (&sample->segment, GST_FORMAT_TIME);
326 * gst_sample_set_info:
327 * @sample: A #GstSample
328 * @info: (transfer full): A #GstStructure
330 * Set the info structure associated with @sample. @sample must be writable,
331 * and @info must not have a parent set already.
336 gst_sample_set_info (GstSample * sample, GstStructure * info)
338 g_return_val_if_fail (GST_IS_SAMPLE (sample), FALSE);
339 g_return_val_if_fail (gst_sample_is_writable (sample), FALSE);
342 if (!gst_structure_set_parent_refcount (info,
343 &sample->mini_object.refcount))
348 gst_structure_set_parent_refcount (sample->info, NULL);
349 gst_structure_free (sample->info);
357 g_warning ("structure is already owned by another object");