author | hgs |
Fri, 14 May 2010 18:43:44 -0500 | |
changeset 20 | 7e3786c5ed27 |
parent 19 | 24ed0baaf8e5 |
permissions | -rw-r--r-- |
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/* 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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* gstbuffer.c: Buffer operations |
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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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/** |
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* SECTION:gstbuffer |
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* @short_description: Data-passing buffer type, supporting sub-buffers. |
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* @see_also: #GstPad, #GstMiniObject |
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* |
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* Buffers are the basic unit of data transfer in GStreamer. The #GstBuffer |
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* type provides all the state necessary to define a region of memory as part |
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* of a stream. Sub-buffers are also supported, allowing a smaller region of a |
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* buffer to become its own buffer, with mechanisms in place to ensure that |
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* neither memory space goes away prematurely. |
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* |
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* Buffers are usually created with gst_buffer_new(). After a buffer has been |
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* created one will typically allocate memory for it and set the size of the |
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* buffer data. The following example creates a buffer that can hold a given |
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* video frame with a given width, height and bits per plane. |
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* <example> |
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* <title>Creating a buffer for a video frame</title> |
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* <programlisting> |
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* GstBuffer *buffer; |
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* gint size, width, height, bpp; |
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* ... |
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* size = width * height * bpp; |
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* buffer = gst_buffer_new (); |
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* GST_BUFFER_SIZE (buffer) = size; |
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* GST_BUFFER_MALLOCDATA (buffer) = g_malloc (size); |
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* GST_BUFFER_DATA (buffer) = GST_BUFFER_MALLOCDATA (buffer); |
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* ... |
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* </programlisting> |
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* </example> |
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* |
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* Alternatively, use gst_buffer_new_and_alloc() |
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* to create a buffer with preallocated data of a given size. |
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* |
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* The data pointed to by the buffer can be retrieved with the GST_BUFFER_DATA() |
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* macro. The size of the data can be found with GST_BUFFER_SIZE(). For buffers |
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* of size 0, the data pointer is undefined (usually NULL) and should never be used. |
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* |
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* If an element knows what pad you will push the buffer out on, it should use |
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* gst_pad_alloc_buffer() instead to create a buffer. This allows downstream |
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* elements to provide special buffers to write in, like hardware buffers. |
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* |
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* A buffer has a pointer to a #GstCaps describing the media type of the data |
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* in the buffer. Attach caps to the buffer with gst_buffer_set_caps(); this |
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* is typically done before pushing out a buffer using gst_pad_push() so that |
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* the downstream element knows the type of the buffer. |
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* |
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* A buffer will usually have a timestamp, and a duration, but neither of these |
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* are guaranteed (they may be set to #GST_CLOCK_TIME_NONE). Whenever a |
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* meaningful value can be given for these, they should be set. The timestamp |
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* and duration are measured in nanoseconds (they are #GstClockTime values). |
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* |
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* A buffer can also have one or both of a start and an end offset. These are |
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* media-type specific. For video buffers, the start offset will generally be |
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* the frame number. For audio buffers, it will be the number of samples |
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* produced so far. For compressed data, it could be the byte offset in a |
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* source or destination file. Likewise, the end offset will be the offset of |
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* the end of the buffer. These can only be meaningfully interpreted if you |
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* know the media type of the buffer (the #GstCaps set on it). Either or both |
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* can be set to #GST_BUFFER_OFFSET_NONE. |
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* |
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* gst_buffer_ref() is used to increase the refcount of a buffer. This must be |
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* done when you want to keep a handle to the buffer after pushing it to the |
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* next element. |
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* |
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* To efficiently create a smaller buffer out of an existing one, you can |
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* use gst_buffer_create_sub(). |
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* |
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* If a plug-in wants to modify the buffer data in-place, it should first obtain |
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* a buffer that is safe to modify by using gst_buffer_make_writable(). This |
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* function is optimized so that a copy will only be made when it is necessary. |
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* |
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* A plugin that only wishes to modify the metadata of a buffer, such as the |
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* offset, timestamp or caps, should use gst_buffer_make_metadata_writable(), |
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* which will create a subbuffer of the original buffer to ensure the caller |
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* has sole ownership, and not copy the buffer data. |
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* |
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* Several flags of the buffer can be set and unset with the |
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* GST_BUFFER_FLAG_SET() and GST_BUFFER_FLAG_UNSET() macros. Use |
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* GST_BUFFER_FLAG_IS_SET() to test if a certain #GstBufferFlag is set. |
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102 |
* |
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* Buffers can be efficiently merged into a larger buffer with |
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* gst_buffer_merge() and gst_buffer_span() if the gst_buffer_is_span_fast() |
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* function returns TRUE. |
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106 |
* |
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* An element should either unref the buffer or push it out on a src pad |
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* using gst_pad_push() (see #GstPad). |
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109 |
* |
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* Buffers are usually freed by unreffing them with gst_buffer_unref(). When |
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* the refcount drops to 0, any data pointed to by GST_BUFFER_MALLOCDATA() will |
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* also be freed. |
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113 |
* |
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* Last reviewed on August 11th, 2006 (0.10.10) |
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*/ |
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#include "gst_private.h" |
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117 |
|
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#include "gstbuffer.h" |
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#include "gstinfo.h" |
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#include "gstutils.h" |
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#include "gstminiobject.h" |
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122 |
|
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static void gst_buffer_finalize (GstBuffer * buffer); |
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static GstBuffer *_gst_buffer_copy (GstBuffer * buffer); |
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static GType gst_subbuffer_get_type (void); |
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126 |
|
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static GType _gst_subbuffer_type = 0; |
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static GType _gst_buffer_type = 0; |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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132 |
|
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133 |
|
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134 |
void |
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_gst_buffer_initialize (void) |
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136 |
{ |
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/* the GstMiniObject types need to be class_ref'd once before it can be |
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* done from multiple threads; |
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* see http://bugzilla.gnome.org/show_bug.cgi?id=304551 */ |
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g_type_class_ref (gst_buffer_get_type ()); |
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g_type_class_ref (gst_subbuffer_get_type ()); |
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} |
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143 |
|
16 | 144 |
#define _do_init \ |
145 |
{ \ |
|
146 |
_gst_buffer_type = g_define_type_id; \ |
|
0
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} |
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|
16 | 149 |
G_DEFINE_TYPE_WITH_CODE (GstBuffer, gst_buffer, GST_TYPE_MINI_OBJECT, _do_init); |
0
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|
16 | 151 |
static void |
152 |
gst_buffer_class_init (GstBufferClass * klass) |
|
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{ |
|
154 |
klass->mini_object_class.copy = (GstMiniObjectCopyFunction) _gst_buffer_copy; |
|
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klass->mini_object_class.finalize = |
|
0
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(GstMiniObjectFinalizeFunction) gst_buffer_finalize; |
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} |
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158 |
|
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static void |
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gst_buffer_finalize (GstBuffer * buffer) |
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161 |
{ |
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g_return_if_fail (buffer != NULL); |
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163 |
|
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GST_CAT_LOG (GST_CAT_BUFFER, "finalize %p", buffer); |
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165 |
|
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/* free our data */ |
16 | 167 |
if (G_LIKELY (buffer->malloc_data)) |
168 |
buffer->free_func (buffer->malloc_data); |
|
0
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169 |
|
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gst_caps_replace (&GST_BUFFER_CAPS (buffer), NULL); |
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16 | 172 |
/* ((GstMiniObjectClass *) */ |
173 |
/* gst_buffer_parent_class)->finalize (GST_MINI_OBJECT_CAST (buffer)); */ |
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} |
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175 |
|
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/** |
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* gst_buffer_copy_metadata: |
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* @dest: a destination #GstBuffer |
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* @src: a source #GstBuffer |
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* @flags: flags indicating what metadata fields should be copied. |
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* |
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* Copies the metadata from @src into @dest. The data, size and mallocdata |
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* fields are not copied. |
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* |
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* @flags indicate which fields will be copied. Use #GST_BUFFER_COPY_ALL to copy |
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* all the metadata fields. |
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* |
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* This function is typically called from a custom buffer copy function after |
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* creating @dest and setting the data, size, mallocdata. |
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* |
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* Since: 0.10.13 |
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*/ |
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#ifdef __SYMBIAN32__ |
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194 |
EXPORT_C |
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#endif |
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196 |
|
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197 |
void |
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gst_buffer_copy_metadata (GstBuffer * dest, const GstBuffer * src, |
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GstBufferCopyFlags flags) |
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200 |
{ |
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g_return_if_fail (dest != NULL); |
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g_return_if_fail (src != NULL); |
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|
16 | 204 |
/* nothing to copy if the buffers are the same */ |
205 |
if (G_UNLIKELY (dest == src)) |
|
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return; |
|
207 |
||
0
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GST_CAT_LOG (GST_CAT_BUFFER, "copy %p to %p", src, dest); |
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209 |
|
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if (flags & GST_BUFFER_COPY_FLAGS) { |
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guint mask; |
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212 |
|
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/* copy relevant flags */ |
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mask = GST_BUFFER_FLAG_PREROLL | GST_BUFFER_FLAG_IN_CAPS | |
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GST_BUFFER_FLAG_DELTA_UNIT | GST_BUFFER_FLAG_DISCONT | |
16 | 216 |
GST_BUFFER_FLAG_GAP | GST_BUFFER_FLAG_MEDIA1 | |
217 |
GST_BUFFER_FLAG_MEDIA2 | GST_BUFFER_FLAG_MEDIA3; |
|
0
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GST_MINI_OBJECT_FLAGS (dest) |= GST_MINI_OBJECT_FLAGS (src) & mask; |
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} |
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220 |
|
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if (flags & GST_BUFFER_COPY_TIMESTAMPS) { |
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GST_BUFFER_TIMESTAMP (dest) = GST_BUFFER_TIMESTAMP (src); |
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GST_BUFFER_DURATION (dest) = GST_BUFFER_DURATION (src); |
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GST_BUFFER_OFFSET (dest) = GST_BUFFER_OFFSET (src); |
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GST_BUFFER_OFFSET_END (dest) = GST_BUFFER_OFFSET_END (src); |
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} |
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227 |
|
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if (flags & GST_BUFFER_COPY_CAPS) { |
16 | 229 |
gst_caps_replace (&GST_BUFFER_CAPS (dest), GST_BUFFER_CAPS (src)); |
0
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} |
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} |
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|
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static GstBuffer * |
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_gst_buffer_copy (GstBuffer * buffer) |
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{ |
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GstBuffer *copy; |
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237 |
|
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g_return_val_if_fail (buffer != NULL, NULL); |
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|
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/* create a fresh new buffer */ |
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copy = gst_buffer_new (); |
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|
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/* we simply copy everything from our parent */ |
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copy->data = g_memdup (buffer->data, buffer->size); |
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/* make sure it gets freed (even if the parent is subclassed, we return a |
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normal buffer) */ |
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copy->malloc_data = copy->data; |
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copy->size = buffer->size; |
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|
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gst_buffer_copy_metadata (copy, buffer, GST_BUFFER_COPY_ALL); |
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|
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return copy; |
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} |
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254 |
|
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static void |
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gst_buffer_init (GstBuffer * buffer) |
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{ |
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GST_CAT_LOG (GST_CAT_BUFFER, "init %p", buffer); |
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|
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GST_BUFFER_TIMESTAMP (buffer) = GST_CLOCK_TIME_NONE; |
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GST_BUFFER_DURATION (buffer) = GST_CLOCK_TIME_NONE; |
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GST_BUFFER_OFFSET (buffer) = GST_BUFFER_OFFSET_NONE; |
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GST_BUFFER_OFFSET_END (buffer) = GST_BUFFER_OFFSET_NONE; |
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GST_BUFFER_FREE_FUNC (buffer) = g_free; |
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} |
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|
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/** |
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* gst_buffer_new: |
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* |
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* Creates a newly allocated buffer without any data. |
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* |
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* MT safe. |
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* Returns: the new #GstBuffer. |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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|
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GstBuffer * |
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gst_buffer_new (void) |
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{ |
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GstBuffer *newbuf; |
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|
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newbuf = (GstBuffer *) gst_mini_object_new (_gst_buffer_type); |
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|
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GST_CAT_LOG (GST_CAT_BUFFER, "new %p", newbuf); |
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|
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return newbuf; |
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} |
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|
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/** |
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* gst_buffer_new_and_alloc: |
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* @size: the size of the new buffer's data. |
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* |
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* Creates a newly allocated buffer with data of the given size. |
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* The buffer memory is not cleared. If the requested amount of |
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* memory can't be allocated, the program will abort. Use |
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* gst_buffer_try_new_and_alloc() if you want to handle this case |
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* gracefully or have gotten the size to allocate from an untrusted |
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* source such as a media stream. |
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* |
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* |
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* Note that when @size == 0, the buffer data pointer will be NULL. |
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* |
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* MT safe. |
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* Returns: the new #GstBuffer. |
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*/ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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|
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GstBuffer * |
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gst_buffer_new_and_alloc (guint size) |
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{ |
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GstBuffer *newbuf; |
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|
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newbuf = gst_buffer_new (); |
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|
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newbuf->malloc_data = g_malloc (size); |
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GST_BUFFER_DATA (newbuf) = newbuf->malloc_data; |
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GST_BUFFER_SIZE (newbuf) = size; |
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|
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GST_CAT_LOG (GST_CAT_BUFFER, "new %p of size %d", newbuf, size); |
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|
324 |
|
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325 |
return newbuf; |
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326 |
} |
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327 |
|
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328 |
/** |
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329 |
* gst_buffer_try_new_and_alloc: |
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330 |
* @size: the size of the new buffer's data. |
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331 |
* |
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* Tries to create a newly allocated buffer with data of the given size. If |
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333 |
* the requested amount of memory can't be allocated, NULL will be returned. |
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334 |
* The buffer memory is not cleared. |
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335 |
* |
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336 |
* Note that when @size == 0, the buffer data pointer will be NULL. |
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337 |
* |
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338 |
* MT safe. |
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339 |
* |
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340 |
* Returns: a new #GstBuffer, or NULL if the memory couldn't be allocated. |
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341 |
* |
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342 |
* Since: 0.10.13 |
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*/ |
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344 |
#ifdef __SYMBIAN32__ |
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345 |
EXPORT_C |
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346 |
#endif |
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347 |
|
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348 |
GstBuffer * |
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349 |
gst_buffer_try_new_and_alloc (guint size) |
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350 |
{ |
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351 |
GstBuffer *newbuf; |
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guint8 *malloc_data; |
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353 |
|
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malloc_data = g_try_malloc (size); |
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355 |
|
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if (G_UNLIKELY (malloc_data == NULL && size != 0)) { |
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GST_CAT_WARNING (GST_CAT_BUFFER, "failed to allocate %d bytes", size); |
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358 |
return NULL; |
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359 |
} |
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|
360 |
|
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361 |
/* FIXME: there's no g_type_try_create_instance() in GObject yet, so this |
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* will still abort if a new GstBuffer structure can't be allocated */ |
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newbuf = gst_buffer_new (); |
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|
364 |
|
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GST_BUFFER_MALLOCDATA (newbuf) = malloc_data; |
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GST_BUFFER_DATA (newbuf) = malloc_data; |
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GST_BUFFER_SIZE (newbuf) = size; |
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368 |
|
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369 |
GST_CAT_LOG (GST_CAT_BUFFER, "new %p of size %d", newbuf, size); |
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370 |
|
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371 |
return newbuf; |
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372 |
} |
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373 |
|
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374 |
/** |
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375 |
* gst_buffer_get_caps: |
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* @buffer: a #GstBuffer. |
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377 |
* |
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* Gets the media type of the buffer. This can be NULL if there |
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* is no media type attached to this buffer. |
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380 |
* |
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* Returns: a reference to the #GstCaps. unref after usage. |
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* Returns NULL if there were no caps on this buffer. |
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383 |
*/ |
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384 |
/* this is not made atomic because if the buffer were reffed from multiple |
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|
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* threads, it would have a refcount > 2 and thus be immutable. |
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|
386 |
*/ |
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|
387 |
#ifdef __SYMBIAN32__ |
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388 |
EXPORT_C |
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|
389 |
#endif |
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|
390 |
|
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|
391 |
GstCaps * |
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392 |
gst_buffer_get_caps (GstBuffer * buffer) |
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393 |
{ |
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394 |
GstCaps *ret; |
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|
395 |
|
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|
396 |
g_return_val_if_fail (buffer != NULL, NULL); |
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|
397 |
|
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|
398 |
ret = GST_BUFFER_CAPS (buffer); |
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|
399 |
|
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|
400 |
if (ret) |
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|
401 |
gst_caps_ref (ret); |
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|
402 |
|
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|
403 |
return ret; |
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|
404 |
} |
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|
405 |
|
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|
406 |
/** |
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|
407 |
* gst_buffer_set_caps: |
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|
408 |
* @buffer: a #GstBuffer. |
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|
409 |
* @caps: a #GstCaps. |
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|
410 |
* |
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|
411 |
* Sets the media type on the buffer. The refcount of the caps will |
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|
412 |
* be increased and any previous caps on the buffer will be |
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|
413 |
* unreffed. |
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|
414 |
*/ |
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|
415 |
/* this is not made atomic because if the buffer were reffed from multiple |
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|
416 |
* threads, it would have a refcount > 2 and thus be immutable. |
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|
417 |
*/ |
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|
418 |
#ifdef __SYMBIAN32__ |
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|
419 |
EXPORT_C |
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|
420 |
#endif |
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|
421 |
|
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|
422 |
void |
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|
423 |
gst_buffer_set_caps (GstBuffer * buffer, GstCaps * caps) |
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|
424 |
{ |
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|
425 |
g_return_if_fail (buffer != NULL); |
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|
426 |
|
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|
427 |
gst_caps_replace (&GST_BUFFER_CAPS (buffer), caps); |
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|
428 |
} |
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|
429 |
|
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|
430 |
/** |
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|
431 |
* gst_buffer_is_metadata_writable: |
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|
432 |
* @buf: a #GstBuffer |
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|
433 |
* |
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|
434 |
* Similar to gst_buffer_is_writable, but this only ensures that the |
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|
435 |
* refcount of the buffer is 1, indicating that the caller is the sole |
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|
436 |
* owner and can change the buffer metadata, such as caps and timestamps. |
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|
437 |
* |
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|
438 |
* Returns: TRUE if the metadata is writable. |
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|
439 |
*/ |
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|
440 |
#ifdef __SYMBIAN32__ |
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441 |
EXPORT_C |
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|
442 |
#endif |
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|
443 |
|
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|
444 |
gboolean |
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|
445 |
gst_buffer_is_metadata_writable (GstBuffer * buf) |
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|
446 |
{ |
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|
447 |
return (GST_MINI_OBJECT_REFCOUNT_VALUE (GST_MINI_OBJECT_CAST (buf)) == 1); |
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|
448 |
} |
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|
449 |
|
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|
450 |
/** |
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|
451 |
* gst_buffer_make_metadata_writable: |
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|
452 |
* @buf: a #GstBuffer |
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|
453 |
* |
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|
454 |
* Similar to gst_buffer_make_writable, but does not ensure that the buffer |
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|
455 |
* data array is writable. Instead, this just ensures that the returned buffer |
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456 |
* is solely owned by the caller, by creating a subbuffer of the original |
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|
457 |
* buffer if necessary. |
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|
458 |
* |
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|
459 |
* After calling this function, @buf should not be referenced anymore. The |
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parents:
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|
460 |
* result of this function has guaranteed writable metadata. |
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|
461 |
* |
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|
462 |
* Returns: A new #GstBuffer with writable metadata. |
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|
463 |
*/ |
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|
464 |
#ifdef __SYMBIAN32__ |
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|
465 |
EXPORT_C |
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|
466 |
#endif |
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changeset
|
467 |
|
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|
468 |
GstBuffer * |
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|
469 |
gst_buffer_make_metadata_writable (GstBuffer * buf) |
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|
470 |
{ |
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|
471 |
GstBuffer *ret; |
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|
472 |
|
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|
473 |
if (gst_buffer_is_metadata_writable (buf)) { |
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|
474 |
ret = buf; |
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|
475 |
} else { |
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|
476 |
ret = gst_buffer_create_sub (buf, 0, GST_BUFFER_SIZE (buf)); |
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|
477 |
|
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|
478 |
gst_buffer_unref (buf); |
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|
479 |
} |
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|
480 |
|
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|
481 |
return ret; |
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|
482 |
} |
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|
483 |
|
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|
484 |
typedef struct _GstSubBuffer GstSubBuffer; |
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|
485 |
typedef struct _GstSubBufferClass GstSubBufferClass; |
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|
486 |
|
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|
487 |
#define GST_IS_SUBBUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), _gst_subbuffer_type)) |
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|
488 |
#define GST_SUBBUFFER_CAST(obj) ((GstSubBuffer *)(obj)) |
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|
489 |
|
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|
490 |
struct _GstSubBuffer |
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|
491 |
{ |
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Revision: 200949
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|
492 |
GstBuffer buffer; |
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|
493 |
|
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|
494 |
GstBuffer *parent; |
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|
495 |
}; |
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changeset
|
496 |
|
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|
497 |
struct _GstSubBufferClass |
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|
498 |
{ |
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Revision: 200949
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parents:
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changeset
|
499 |
GstBufferClass buffer_class; |
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|
500 |
}; |
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changeset
|
501 |
|
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Revision: 200949
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|
502 |
static void gst_subbuffer_finalize (GstSubBuffer * buffer); |
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changeset
|
503 |
|
16 | 504 |
#define _do_init_sub \ |
505 |
{ \ |
|
506 |
_gst_subbuffer_type = g_define_type_id; \ |
|
0
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|
507 |
} |
0e761a78d257
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changeset
|
508 |
|
19 | 509 |
//deviation for EXPORT_C issue Start |
510 |
#ifndef __SYMBIAN32__ |
|
511 |
||
16 | 512 |
G_DEFINE_TYPE_WITH_CODE (GstSubBuffer, gst_subbuffer, GST_TYPE_BUFFER, |
513 |
_do_init_sub); |
|
19 | 514 |
|
515 |
#else |
|
516 |
||
517 |
static void gst_subbuffer_init (GstSubBuffer *self); |
|
518 |
static void gst_subbuffer_class_init (GstSubBufferClass *klass); |
|
519 |
static gpointer gst_subbuffer_parent_class = NULL; |
|
520 |
static void gst_subbuffer_class_intern_init (gpointer klass) |
|
521 |
{ |
|
522 |
gst_subbuffer_parent_class = g_type_class_peek_parent (klass); |
|
523 |
gst_subbuffer_class_init ((GstSubBufferClass*) klass); |
|
524 |
} |
|
525 |
||
526 |
static GType |
|
527 |
gst_subbuffer_get_type (void) |
|
528 |
{ |
|
529 |
static volatile gsize g_define_type_id__volatile = 0; |
|
530 |
if (g_once_init_enter (&g_define_type_id__volatile)) |
|
531 |
{ |
|
532 |
GType g_define_type_id = |
|
533 |
g_type_register_static_simple (GST_TYPE_BUFFER, |
|
534 |
g_intern_static_string ("GstSubBuffer"), |
|
535 |
sizeof (GstSubBufferClass), |
|
536 |
(GClassInitFunc) gst_subbuffer_class_intern_init, |
|
537 |
sizeof (GstSubBuffer), |
|
538 |
(GInstanceInitFunc) gst_subbuffer_init, |
|
539 |
(GTypeFlags) 0); |
|
540 |
{ /* custom code follows */ |
|
541 |
_do_init_sub; |
|
542 |
/* following custom code */ |
|
543 |
} |
|
544 |
g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); |
|
545 |
} |
|
546 |
return g_define_type_id__volatile; |
|
547 |
} /* closes type_name##_get_type() */ |
|
548 |
||
549 |
#endif //deviation for EXPORT_C issue end |
|
16 | 550 |
|
0
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|
551 |
static void |
16 | 552 |
gst_subbuffer_class_init (GstSubBufferClass * klass) |
0
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|
553 |
{ |
16 | 554 |
klass->buffer_class.mini_object_class.finalize = |
0
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|
555 |
(GstMiniObjectFinalizeFunction) gst_subbuffer_finalize; |
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|
556 |
} |
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|
557 |
|
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|
558 |
static void |
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diff
changeset
|
559 |
gst_subbuffer_finalize (GstSubBuffer * buffer) |
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|
560 |
{ |
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Revision: 200949
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changeset
|
561 |
gst_buffer_unref (buffer->parent); |
0e761a78d257
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diff
changeset
|
562 |
|
16 | 563 |
((GstMiniObjectClass *) gst_subbuffer_parent_class)->finalize |
564 |
(GST_MINI_OBJECT_CAST (buffer)); |
|
0
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|
565 |
} |
0e761a78d257
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|
566 |
|
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Revision: 200949
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|
567 |
static void |
16 | 568 |
gst_subbuffer_init (GstSubBuffer * instance) |
0
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|
569 |
{ |
0e761a78d257
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diff
changeset
|
570 |
GST_BUFFER_FLAG_SET (GST_BUFFER_CAST (instance), GST_BUFFER_FLAG_READONLY); |
0e761a78d257
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|
571 |
} |
0e761a78d257
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changeset
|
572 |
|
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Revision: 200949
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parents:
diff
changeset
|
573 |
/** |
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parents:
diff
changeset
|
574 |
* gst_buffer_create_sub: |
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parents:
diff
changeset
|
575 |
* @parent: a #GstBuffer. |
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parents:
diff
changeset
|
576 |
* @offset: the offset into parent #GstBuffer at which the new sub-buffer |
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Revision: 200949
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parents:
diff
changeset
|
577 |
* begins. |
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parents:
diff
changeset
|
578 |
* @size: the size of the new #GstBuffer sub-buffer, in bytes. |
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parents:
diff
changeset
|
579 |
* |
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parents:
diff
changeset
|
580 |
* Creates a sub-buffer from @parent at @offset and @size. |
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parents:
diff
changeset
|
581 |
* This sub-buffer uses the actual memory space of the parent buffer. |
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parents:
diff
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|
582 |
* This function will copy the offset and timestamp fields when the |
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parents:
diff
changeset
|
583 |
* offset is 0. If not, they will be set to #GST_CLOCK_TIME_NONE and |
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parents:
diff
changeset
|
584 |
* #GST_BUFFER_OFFSET_NONE. |
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parents:
diff
changeset
|
585 |
* If @offset equals 0 and @size equals the total size of @buffer, the |
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parents:
diff
changeset
|
586 |
* duration and offset end fields are also copied. If not they will be set |
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parents:
diff
changeset
|
587 |
* to #GST_CLOCK_TIME_NONE and #GST_BUFFER_OFFSET_NONE. |
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parents:
diff
changeset
|
588 |
* |
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parents:
diff
changeset
|
589 |
* MT safe. |
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parents:
diff
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|
590 |
* Returns: the new #GstBuffer. |
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parents:
diff
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|
591 |
* Returns NULL if the arguments were invalid. |
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diff
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|
592 |
*/ |
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Revision: 200949
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parents:
diff
changeset
|
593 |
#ifdef __SYMBIAN32__ |
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diff
changeset
|
594 |
EXPORT_C |
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diff
changeset
|
595 |
#endif |
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parents:
diff
changeset
|
596 |
|
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parents:
diff
changeset
|
597 |
GstBuffer * |
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diff
changeset
|
598 |
gst_buffer_create_sub (GstBuffer * buffer, guint offset, guint size) |
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parents:
diff
changeset
|
599 |
{ |
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parents:
diff
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|
600 |
GstSubBuffer *subbuffer; |
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diff
changeset
|
601 |
GstBuffer *parent; |
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diff
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|
602 |
gboolean complete; |
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parents:
diff
changeset
|
603 |
|
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parents:
diff
changeset
|
604 |
g_return_val_if_fail (buffer != NULL, NULL); |
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parents:
diff
changeset
|
605 |
g_return_val_if_fail (buffer->mini_object.refcount > 0, NULL); |
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parents:
diff
changeset
|
606 |
g_return_val_if_fail (buffer->size >= offset + size, NULL); |
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parents:
diff
changeset
|
607 |
|
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Revision: 200949
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parents:
diff
changeset
|
608 |
/* find real parent */ |
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parents:
diff
changeset
|
609 |
if (GST_IS_SUBBUFFER (buffer)) { |
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parents:
diff
changeset
|
610 |
parent = GST_SUBBUFFER_CAST (buffer)->parent; |
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parents:
diff
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|
611 |
} else { |
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parents:
diff
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|
612 |
parent = buffer; |
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parents:
diff
changeset
|
613 |
} |
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parents:
diff
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|
614 |
gst_buffer_ref (parent); |
0e761a78d257
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parents:
diff
changeset
|
615 |
|
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Revision: 200949
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parents:
diff
changeset
|
616 |
/* create the new buffer */ |
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Revision: 200949
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parents:
diff
changeset
|
617 |
subbuffer = (GstSubBuffer *) gst_mini_object_new (_gst_subbuffer_type); |
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Revision: 200949
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parents:
diff
changeset
|
618 |
subbuffer->parent = parent; |
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parents:
diff
changeset
|
619 |
|
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parents:
diff
changeset
|
620 |
GST_CAT_LOG (GST_CAT_BUFFER, "new subbuffer %p (parent %p)", subbuffer, |
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diff
changeset
|
621 |
parent); |
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parents:
diff
changeset
|
622 |
|
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
623 |
/* set the right values in the child */ |
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parents:
diff
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|
624 |
GST_BUFFER_DATA (GST_BUFFER_CAST (subbuffer)) = buffer->data + offset; |
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diff
changeset
|
625 |
GST_BUFFER_SIZE (GST_BUFFER_CAST (subbuffer)) = size; |
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parents:
diff
changeset
|
626 |
|
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parents:
diff
changeset
|
627 |
if ((offset == 0) && (size == GST_BUFFER_SIZE (buffer))) { |
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Revision: 200949
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parents:
diff
changeset
|
628 |
/* copy all the flags except IN_CAPS */ |
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parents:
diff
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|
629 |
GST_BUFFER_FLAG_SET (subbuffer, GST_BUFFER_FLAGS (buffer)); |
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diff
changeset
|
630 |
GST_BUFFER_FLAG_UNSET (subbuffer, GST_BUFFER_FLAG_IN_CAPS); |
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changeset
|
631 |
} else { |
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Revision: 200949
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parents:
diff
changeset
|
632 |
/* copy only PREROLL & GAP flags */ |
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parents:
diff
changeset
|
633 |
GST_BUFFER_FLAG_SET (subbuffer, (GST_BUFFER_FLAGS (buffer) & |
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parents:
diff
changeset
|
634 |
(GST_BUFFER_FLAG_PREROLL | GST_BUFFER_FLAG_GAP))); |
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parents:
diff
changeset
|
635 |
} |
0e761a78d257
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parents:
diff
changeset
|
636 |
|
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Revision: 200949
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parents:
diff
changeset
|
637 |
/* we can copy the timestamp and offset if the new buffer starts at |
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Revision: 200949
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parents:
diff
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|
638 |
* offset 0 */ |
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Revision: 200949
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parents:
diff
changeset
|
639 |
if (offset == 0) { |
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diff
changeset
|
640 |
GST_BUFFER_TIMESTAMP (subbuffer) = GST_BUFFER_TIMESTAMP (buffer); |
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parents:
diff
changeset
|
641 |
GST_BUFFER_OFFSET (subbuffer) = GST_BUFFER_OFFSET (buffer); |
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parents:
diff
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|
642 |
complete = (buffer->size == size); |
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parents:
diff
changeset
|
643 |
} else { |
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parents:
diff
changeset
|
644 |
GST_BUFFER_TIMESTAMP (subbuffer) = GST_CLOCK_TIME_NONE; |
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diff
changeset
|
645 |
GST_BUFFER_OFFSET (subbuffer) = GST_BUFFER_OFFSET_NONE; |
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parents:
diff
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|
646 |
complete = FALSE; |
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diff
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|
647 |
} |
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parents:
diff
changeset
|
648 |
|
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Revision: 200949
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parents:
diff
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|
649 |
if (complete) { |
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parents:
diff
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|
650 |
GstCaps *caps; |
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parents:
diff
changeset
|
651 |
|
0e761a78d257
Revision: 200949
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parents:
diff
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|
652 |
/* if we copied the complete buffer we can copy the duration, |
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parents:
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|
653 |
* offset_end and caps as well */ |
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parents:
diff
changeset
|
654 |
GST_BUFFER_DURATION (subbuffer) = GST_BUFFER_DURATION (buffer); |
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parents:
diff
changeset
|
655 |
GST_BUFFER_OFFSET_END (subbuffer) = GST_BUFFER_OFFSET_END (buffer); |
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Revision: 200949
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parents:
diff
changeset
|
656 |
if ((caps = GST_BUFFER_CAPS (buffer))) |
0e761a78d257
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parents:
diff
changeset
|
657 |
gst_caps_ref (caps); |
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parents:
diff
changeset
|
658 |
GST_BUFFER_CAPS (subbuffer) = caps; |
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Revision: 200949
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parents:
diff
changeset
|
659 |
} else { |
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parents:
diff
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|
660 |
GST_BUFFER_DURATION (subbuffer) = GST_CLOCK_TIME_NONE; |
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parents:
diff
changeset
|
661 |
GST_BUFFER_OFFSET_END (subbuffer) = GST_BUFFER_OFFSET_NONE; |
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parents:
diff
changeset
|
662 |
GST_BUFFER_CAPS (subbuffer) = NULL; |
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Revision: 200949
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parents:
diff
changeset
|
663 |
} |
0e761a78d257
Revision: 200949
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parents:
diff
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|
664 |
return GST_BUFFER_CAST (subbuffer); |
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parents:
diff
changeset
|
665 |
} |
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parents:
diff
changeset
|
666 |
|
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
667 |
/** |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
668 |
* gst_buffer_is_span_fast: |
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Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
669 |
* @buf1: the first #GstBuffer. |
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Revision: 200949
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parents:
diff
changeset
|
670 |
* @buf2: the second #GstBuffer. |
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Revision: 200949
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parents:
diff
changeset
|
671 |
* |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
672 |
* Determines whether a gst_buffer_span() can be done without copying |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
673 |
* the contents, that is, whether the data areas are contiguous sub-buffers of |
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Revision: 200949
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parents:
diff
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|
674 |
* the same buffer. |
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Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
675 |
* |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
676 |
* MT safe. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
677 |
* Returns: TRUE if the buffers are contiguous, |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
678 |
* FALSE if a copy would be required. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
679 |
*/ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
680 |
#ifdef __SYMBIAN32__ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
681 |
EXPORT_C |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
682 |
#endif |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
683 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
684 |
gboolean |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
685 |
gst_buffer_is_span_fast (GstBuffer * buf1, GstBuffer * buf2) |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
686 |
{ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
687 |
g_return_val_if_fail (buf1 != NULL && buf2 != NULL, FALSE); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
688 |
g_return_val_if_fail (buf1->mini_object.refcount > 0, FALSE); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
689 |
g_return_val_if_fail (buf2->mini_object.refcount > 0, FALSE); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
690 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
691 |
/* it's only fast if we have subbuffers of the same parent */ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
692 |
return (GST_IS_SUBBUFFER (buf1) && |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
693 |
GST_IS_SUBBUFFER (buf2) && |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
694 |
(GST_SUBBUFFER_CAST (buf1)->parent == GST_SUBBUFFER_CAST (buf2)->parent) |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
695 |
&& ((buf1->data + buf1->size) == buf2->data)); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
696 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
697 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
698 |
/** |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
699 |
* gst_buffer_span: |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
700 |
* @buf1: the first source #GstBuffer to merge. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
701 |
* @offset: the offset in the first buffer from where the new |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
702 |
* buffer should start. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
703 |
* @buf2: the second source #GstBuffer to merge. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
704 |
* @len: the total length of the new buffer. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
705 |
* |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
706 |
* Creates a new buffer that consists of part of buf1 and buf2. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
707 |
* Logically, buf1 and buf2 are concatenated into a single larger |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
708 |
* buffer, and a new buffer is created at the given offset inside |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
709 |
* this space, with a given length. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
710 |
* |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
711 |
* If the two source buffers are children of the same larger buffer, |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
712 |
* and are contiguous, the new buffer will be a child of the shared |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
713 |
* parent, and thus no copying is necessary. you can use |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
714 |
* gst_buffer_is_span_fast() to determine if a memcpy will be needed. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
715 |
* |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
716 |
* MT safe. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
717 |
* Returns: the new #GstBuffer that spans the two source buffers. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
718 |
* Returns NULL if the arguments are invalid. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
719 |
*/ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
720 |
#ifdef __SYMBIAN32__ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
721 |
EXPORT_C |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
722 |
#endif |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
723 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
724 |
GstBuffer * |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
725 |
gst_buffer_span (GstBuffer * buf1, guint32 offset, GstBuffer * buf2, |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
726 |
guint32 len) |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
727 |
{ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
728 |
GstBuffer *newbuf; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
729 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
730 |
g_return_val_if_fail (buf1 != NULL && buf2 != NULL, NULL); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
731 |
g_return_val_if_fail (buf1->mini_object.refcount > 0, NULL); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
732 |
g_return_val_if_fail (buf2->mini_object.refcount > 0, NULL); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
733 |
g_return_val_if_fail (len > 0, NULL); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
734 |
g_return_val_if_fail (len <= buf1->size + buf2->size - offset, NULL); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
735 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
736 |
/* if the two buffers have the same parent and are adjacent */ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
737 |
if (gst_buffer_is_span_fast (buf1, buf2)) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
738 |
GstBuffer *parent = GST_SUBBUFFER_CAST (buf1)->parent; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
739 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
740 |
/* we simply create a subbuffer of the common parent */ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
741 |
newbuf = gst_buffer_create_sub (parent, |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
742 |
buf1->data - parent->data + offset, len); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
743 |
} else { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
744 |
GST_CAT_DEBUG (GST_CAT_BUFFER, |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
745 |
"slow path taken while spanning buffers %p and %p", buf1, buf2); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
746 |
/* otherwise we simply have to brute-force copy the buffers */ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
747 |
newbuf = gst_buffer_new_and_alloc (len); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
748 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
749 |
/* copy the first buffer's data across */ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
750 |
memcpy (newbuf->data, buf1->data + offset, buf1->size - offset); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
751 |
/* copy the second buffer's data across */ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
752 |
memcpy (newbuf->data + (buf1->size - offset), buf2->data, |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
753 |
len - (buf1->size - offset)); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
754 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
755 |
/* if the offset is 0, the new buffer has the same timestamp as buf1 */ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
756 |
if (offset == 0) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
757 |
GST_BUFFER_OFFSET (newbuf) = GST_BUFFER_OFFSET (buf1); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
758 |
GST_BUFFER_TIMESTAMP (newbuf) = GST_BUFFER_TIMESTAMP (buf1); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
759 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
760 |
/* if we completely merged the two buffers (appended), we can |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
761 |
* calculate the duration too. Also make sure we's not messing with |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
762 |
* invalid DURATIONS */ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
763 |
if (buf1->size + buf2->size == len) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
764 |
if (GST_BUFFER_DURATION_IS_VALID (buf1) && |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
765 |
GST_BUFFER_DURATION_IS_VALID (buf2)) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
766 |
/* add duration */ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
767 |
GST_BUFFER_DURATION (newbuf) = GST_BUFFER_DURATION (buf1) + |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
768 |
GST_BUFFER_DURATION (buf2); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
769 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
770 |
if (GST_BUFFER_OFFSET_END_IS_VALID (buf2)) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
771 |
/* add offset_end */ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
772 |
GST_BUFFER_OFFSET_END (newbuf) = GST_BUFFER_OFFSET_END (buf2); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
773 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
774 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
775 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
776 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
777 |
return newbuf; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
778 |
} |