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183 lines
7.4 KiB
Plaintext
183 lines
7.4 KiB
Plaintext
The 0.11 porting guide
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----------------------
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* All deprecated methods were removed. Recompile against 0.10 with
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DISABLE_DEPRECATED and fix issues before attempting to port to 0.11.
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* GST_BOILERPLATE is gone, use G_DEFINE_TYPE instead.
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* various methods take a gsize instead of a guint when talking about memory
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sizes.
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* multifdsink, tcpclientsink, tcpclientsrc, tcpserversrc the protocol property
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is removed, use gdppay and gdpdepay.
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* GstObject:
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GST_OBJECT_DISPOSING flag removed
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GST_OBJECT_IS_DISPOSING removed
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GST_OBJECT_FLOATING flag remove, GstObject is now GInitiallyUnowned
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GST_OBJECT_IS_FLOATING removed, use g_object_is_floating()
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GST_CLASS_GET_LOCK, GST_CLASS_LOCK, GST_CLASS_TRYLOCK, GST_CLASS_UNLOCK,
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used to be a workaround for thread-unsafe glib < 2.8
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gst_object_ref_sink() has gpointer as result to make it more like the
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GObject version.
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gst_object_sink() removed, use gst_object_ref_sink() instead.
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gst_class_signal_connect() removed, was only used for XML
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parent-set and parent-unset signals removed. Use notify:parent. Currently
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still disabled because of deep notify locking issues.
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* GstElement:
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GstElementDetails is removed and replaced with more generic metadata.
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gst_element_class_set_details_simple() -> gst_element_class_set_metadata()
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gst_element_class_set_documentation_uri -> gst_element_class_add_metadata
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gst_element_class_set_icon_name -> gst_element_class_add_metadata
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gst_element_factory_get_longname -> gst_element_factory_get_metadata
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gst_element_factory_get_klass -> gst_element_factory_get_metadata
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gst_element_factory_get_description -> gst_element_factory_get_metadata
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gst_element_factory_get_author -> gst_element_factory_get_metadata
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gst_element_factory_get_documentation_uri -> gst_element_factory_get_metadata
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gst_element_factory_get_icon_name -> gst_element_factory_get_metadata
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gstelementmetadata.h contains the keys for all standard metadata.
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Element metadata and pad templates are inherited from parent classes and
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should be added in class_init instead of base_init.
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gst_element_class_add_pad_template() takes ownership of the template
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Elements that change the duration must post DURATION messages on the
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bus when the duration changes in PAUSED or PLAYING.
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* GstPad:
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gst_pad_get_caps() does not return writable caps anymore and an explicit
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gst_caps_make_writable() needs to be performed. This was the functionality
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of gst_pad_get_caps_reffed(), which is removed now.
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A similar change was done for gst_pad_peer_get_caps() and
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gst_pad_peer_get_caps_reffed()
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* GstMiniObject
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A miniobject is now a simple refcounted structure holding the information
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common to buffers, events, messages, queries and caps.
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There is no more GST_TYPE_MINIOBJECT as the type for subclasses.
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G_TYPE_BOXED can be used as the type of all GstMiniObject based types such
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as buffers, events, messages, caps, etc. Signals, for example, would use the
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boxed type if the argument include GstMiniObject derived types.
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gst_mini_object_new() is removed. You would allocate memory with the the
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methods specific for the derived type.
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GstParamSpecMiniObject is removed, use boxed param spec now with the GType
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of the specific GstMiniObject derived type. Also
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gst_param_spec_mini_object().
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gst_param_spec_mini_object() -> g_param_spec_boxed()
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The specific gst_value_*_mini_object() methods are removed, used the generic
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boxed methods instead.
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gst_value_set_mini_object() -> g_value_set_boxed()
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gst_value_take_mini_object() -> g_value_take_boxed()
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gst_value_take_get_object() -> g_value_get_boxed()
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gst_value_take_dup_object() -> g_value_dup_boxed()
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The GST_MINI_OBJECT_READONLY flag was removed as it used to mark the
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memory in buffers as READONLY. Marking memory READONLY can now be done
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with the GstMemory API. Writability of miniobjects is now only done by using
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the refcount.
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* GstBuffer
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A GstBuffer is now a simple boxed type this means that subclassing is not
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possible anymore.
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To add data to the buffer you would now use gst_buffer_take_memory() with
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a GstMemory object containing the data. Multiple memory blocks can added to
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a GstBuffer that can then be retrieved with gst_buffer_peek_memory().
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GST_BUFFER_DATA(), GST_BUFFER_MALLOCDATA(), GST_BUFFER_FREE_FUNC() and
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GST_BUFFER_SIZE() are gone, along with the fields in GstBuffer. Use the
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memory API to get access to the buffer data. GST_BUFFER_SIZE() can be
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replaced with gst_buffer_get_size() but if also access to the data is
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required, gst_buffer_map() can return both the size and data in one go.
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The most common way to access all the data in a buffer is by using
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gst_buffer_map() and gst_buffer_unmap(). These calls require you to specify
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the access mode required to the data and will automatically merge and return
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a writable copy of the data.
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The buffer must be writable (gst_buffer_is_writable()) in order to modify
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the fields, metadata or buffer memory. gst_buffer_make_writable() will not
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automatically make a writable copy of the memory but will instead increase
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the refcount of the memory. The _map() and _peek_memory() methods will
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automatically create writable copies when needed.
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gst_buffer_make_metadata_writable() is gone, you can replace this safely
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with gst_buffer_make_writable().
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gst_buffer_create_sub() is gone and can be safely replaced with
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gst_buffer_copy_region().
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Changing the size of the buffer data can be done with gst_buffer_resize(),
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which will also update the metadata fields correctly. gst_buffer_set_size()
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is #defined to a special case of gst_buffer_resize() with a 0 offset.
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gst_buffer_try_new_and_alloc() is replaced with gst_buffer_new_and_alloc(),
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which now returns NULL when memory allocation fails.
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* GstBufferList
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The GstBufferList object is much simplified because most of the
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functionality in the groups is now part of the GstMemory in buffers.
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The object is reduced to encapsulating an array of buffers that you can send
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with the regular gst_pad_push_list. The iterator is not needed anymore
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because you can simply use gst_buffer_list_len() and gst_buffer_list_get()
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to iterate the array.
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For dealing with the groups, it's now needed to add the memory blocks to
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GstBuffer and use the normal buffer API to get and merge the groups.
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* GstEvent
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* GstQuery
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Boxed types derived from GstMiniObject.
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* GstBufferList
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Is now a boxed type derived from GstMiniObject.
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* GstMessage
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Is now a boxed type derived from GstMiniObject
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* GstCaps
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Is now a boxed type derived from GstMiniObject.
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* GstTypeFind
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gst_type_find_peek() returns a const guin8 * now.
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* GstAdapter
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gst_adapter_peek() is removed, use gst_adapter_map() and gst_adapter_unmap()
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to get access to raw data from the adapter.
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Arguments renamed from guint to gsize.
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* GstBitReader, GstByteReader, GstByteWriter
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gst_*_reader_new_from_buffer(), gst_*_reader_init_from_buffer() removed, get
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access to the buffer data with _map() and then use the _new() functions.
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gst_byte_reader_new_from_buffer() and gst_byte_reader_init_from_buffer()
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removed, get access to the buffer data and then use the _new() functions.
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* GstCollectPads
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gst_collect_pads_read() removed, use _read_buffer() or _take_buffer() and
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then use the memory API to get to the memory.
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