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7e2ace8618
We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
374 lines
16 KiB
C
374 lines
16 KiB
C
/* GStreamer
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* Copyright (C) 2008 Nokia Corporation. All rights reserved.
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*
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* Contact: Stefan Kost <stefan.kost@nokia.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_BASE_PARSE_H__
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#define __GST_BASE_PARSE_H__
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#include <gst/gst.h>
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#include <gst/base/base-prelude.h>
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G_BEGIN_DECLS
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#define GST_TYPE_BASE_PARSE (gst_base_parse_get_type())
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#define GST_BASE_PARSE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_PARSE,GstBaseParse))
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#define GST_BASE_PARSE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_PARSE,GstBaseParseClass))
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#define GST_BASE_PARSE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_BASE_PARSE,GstBaseParseClass))
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#define GST_IS_BASE_PARSE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_PARSE))
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#define GST_IS_BASE_PARSE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_PARSE))
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#define GST_BASE_PARSE_CAST(obj) ((GstBaseParse *)(obj))
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/**
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* GST_BASE_PARSE_SRC_PAD:
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* @obj: base parse instance
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*
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* Gives the pointer to the source #GstPad object of the element.
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*/
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#define GST_BASE_PARSE_SRC_PAD(obj) (GST_BASE_PARSE_CAST (obj)->srcpad)
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/**
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* GST_BASE_PARSE_SINK_PAD:
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* @obj: base parse instance
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*
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* Gives the pointer to the sink #GstPad object of the element.
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*/
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#define GST_BASE_PARSE_SINK_PAD(obj) (GST_BASE_PARSE_CAST (obj)->sinkpad)
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/**
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* GST_BASE_PARSE_FLOW_DROPPED:
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*
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* A #GstFlowReturn that can be returned from parse_frame to
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* indicate that no output buffer was generated, or from pre_push_frame to
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* to forego pushing buffer.
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*/
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#define GST_BASE_PARSE_FLOW_DROPPED GST_FLOW_CUSTOM_SUCCESS
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/* not public API, use accessor macros below */
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#define GST_BASE_PARSE_FLAG_LOST_SYNC (1 << 0)
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#define GST_BASE_PARSE_FLAG_DRAINING (1 << 1)
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/**
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* GST_BASE_PARSE_LOST_SYNC:
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* @parse: base parse instance
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*
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* Obtains current sync status.
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*/
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#define GST_BASE_PARSE_LOST_SYNC(parse) (!!(GST_BASE_PARSE_CAST(parse)->flags & GST_BASE_PARSE_FLAG_LOST_SYNC))
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/**
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* GST_BASE_PARSE_DRAINING:
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* @parse: base parse instance
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*
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* Obtains current drain status (ie. whether EOS has been received and
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* the parser is now processing the frames at the end of the stream)
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*/
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#define GST_BASE_PARSE_DRAINING(parse) (!!(GST_BASE_PARSE_CAST(parse)->flags & GST_BASE_PARSE_FLAG_DRAINING))
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/**
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* GstBaseParseFrameFlags:
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* @GST_BASE_PARSE_FRAME_FLAG_NONE: no flag
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* @GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME: set by baseclass if current frame
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* is passed for processing to the subclass for the first time
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* (and not set on subsequent calls with same data).
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* @GST_BASE_PARSE_FRAME_FLAG_NO_FRAME: set to indicate this buffer should not be
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* counted as frame, e.g. if this frame is dependent on a previous one.
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* As it is not counted as a frame, bitrate increases but frame to time
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* conversions are maintained.
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* @GST_BASE_PARSE_FRAME_FLAG_CLIP: @pre_push_frame can set this to indicate
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* that regular segment clipping can still be performed (as opposed to
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* any custom one having been done).
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* @GST_BASE_PARSE_FRAME_FLAG_DROP: indicates to @finish_frame that the
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* the frame should be dropped (and might be handled internally by subclass)
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* @GST_BASE_PARSE_FRAME_FLAG_QUEUE: indicates to @finish_frame that the
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* the frame should be queued for now and processed fully later
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* when the first non-queued frame is finished
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*
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* Flags to be used in a #GstBaseParseFrame.
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*/
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typedef enum {
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GST_BASE_PARSE_FRAME_FLAG_NONE = 0,
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GST_BASE_PARSE_FRAME_FLAG_NEW_FRAME = (1 << 0),
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GST_BASE_PARSE_FRAME_FLAG_NO_FRAME = (1 << 1),
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GST_BASE_PARSE_FRAME_FLAG_CLIP = (1 << 2),
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GST_BASE_PARSE_FRAME_FLAG_DROP = (1 << 3),
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GST_BASE_PARSE_FRAME_FLAG_QUEUE = (1 << 4)
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} GstBaseParseFrameFlags;
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/**
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* GstBaseParseFrame:
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* @buffer: input data to be parsed for frames.
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* @out_buffer: output data.
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* @offset: media specific offset of input frame
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* Note that a converter may have a different one on the frame's buffer.
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* @overhead: subclass can set this to indicates the metadata overhead
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* for the given frame, which is then used to enable more accurate bitrate
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* computations. If this is -1, it is assumed that this frame should be
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* skipped in bitrate calculation.
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* @flags: a combination of input and output #GstBaseParseFrameFlags that
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* convey additional context to subclass or allow subclass to tune
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* subsequent #GstBaseParse actions.
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*
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* Frame (context) data passed to each frame parsing virtual methods. In
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* addition to providing the data to be checked for a valid frame or an already
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* identified frame, it conveys additional metadata or control information
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* from and to the subclass w.r.t. the particular frame in question (rather
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* than global parameters). Some of these may apply to each parsing stage, others
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* only to some a particular one. These parameters are effectively zeroed at start
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* of each frame's processing, i.e. parsing virtual method invocation sequence.
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*/
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typedef struct {
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GstBuffer * buffer;
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GstBuffer * out_buffer;
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guint flags;
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guint64 offset;
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gint overhead;
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/*< private >*/
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gint size;
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guint _gst_reserved_i[2];
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gpointer _gst_reserved_p[2];
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guint _private_flags;
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} GstBaseParseFrame;
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typedef struct _GstBaseParse GstBaseParse;
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typedef struct _GstBaseParseClass GstBaseParseClass;
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typedef struct _GstBaseParsePrivate GstBaseParsePrivate;
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/**
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* GstBaseParse:
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* @element: the parent element.
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*
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* The opaque #GstBaseParse data structure.
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*/
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struct _GstBaseParse {
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/*< public >*/
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GstElement element;
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/*< protected >*/
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/* source and sink pads */
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GstPad *sinkpad;
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GstPad *srcpad;
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guint flags;
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/* MT-protected (with STREAM_LOCK) */
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GstSegment segment;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING_LARGE];
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GstBaseParsePrivate *priv;
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};
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/**
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* GstBaseParseClass:
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* @parent_class: the parent class
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* @start: Optional.
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* Called when the element starts processing.
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* Allows opening external resources.
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* @stop: Optional.
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* Called when the element stops processing.
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* Allows closing external resources.
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* @set_sink_caps: Optional.
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* Allows the subclass to be notified of the actual caps set.
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* @get_sink_caps: Optional.
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* Allows the subclass to do its own sink get caps if needed.
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* @handle_frame: Parses the input data into valid frames as defined by subclass
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* which should be passed to gst_base_parse_finish_frame().
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* The frame's input buffer is guaranteed writable,
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* whereas the input frame ownership is held by caller
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* (so subclass should make a copy if it needs to hang on).
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* Input buffer (data) is provided by baseclass with as much
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* metadata set as possible by baseclass according to upstream
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* information and/or subclass settings,
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* though subclass may still set buffer timestamp and duration
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* if desired.
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* @convert: Optional.
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* Convert between formats.
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* @sink_event: Optional.
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* Event handler on the sink pad. This function should chain
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* up to the parent implementation to let the default handler
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* run.
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* @src_event: Optional.
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* Event handler on the source pad. Should chain up to the
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* parent to let the default handler run.
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* @pre_push_frame: Optional.
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* Called just prior to pushing a frame (after any pending
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* events have been sent) to give subclass a chance to perform
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* additional actions at this time (e.g. tag sending) or to
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* decide whether this buffer should be dropped or not
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* (e.g. custom segment clipping).
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* @detect: Optional.
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* Called until it doesn't return GST_FLOW_OK anymore for
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* the first buffers. Can be used by the subclass to detect
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* the stream format.
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* @sink_query: Optional.
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* Query handler on the sink pad. This function should chain
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* up to the parent implementation to let the default handler
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* run (Since 1.2)
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* @src_query: Optional.
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* Query handler on the source pad. Should chain up to the
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* parent to let the default handler run (Since 1.2)
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*
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* Subclasses can override any of the available virtual methods or not, as
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* needed. At minimum @handle_frame needs to be overridden.
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*/
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struct _GstBaseParseClass {
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GstElementClass parent_class;
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/*< public >*/
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/* virtual methods for subclasses */
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gboolean (*start) (GstBaseParse * parse);
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gboolean (*stop) (GstBaseParse * parse);
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gboolean (*set_sink_caps) (GstBaseParse * parse,
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GstCaps * caps);
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GstFlowReturn (*handle_frame) (GstBaseParse * parse,
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GstBaseParseFrame * frame,
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gint * skipsize);
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GstFlowReturn (*pre_push_frame) (GstBaseParse * parse,
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GstBaseParseFrame * frame);
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gboolean (*convert) (GstBaseParse * parse,
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GstFormat src_format,
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gint64 src_value,
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GstFormat dest_format,
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gint64 * dest_value);
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gboolean (*sink_event) (GstBaseParse * parse,
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GstEvent * event);
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gboolean (*src_event) (GstBaseParse * parse,
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GstEvent * event);
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GstCaps * (*get_sink_caps) (GstBaseParse * parse,
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GstCaps * filter);
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GstFlowReturn (*detect) (GstBaseParse * parse,
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GstBuffer * buffer);
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gboolean (*sink_query) (GstBaseParse * parse,
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GstQuery * query);
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gboolean (*src_query) (GstBaseParse * parse,
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GstQuery * query);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING_LARGE - 2];
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};
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GST_BASE_API
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GType gst_base_parse_get_type (void);
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GST_BASE_API
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GType gst_base_parse_frame_get_type (void);
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GST_BASE_API
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GstBaseParseFrame * gst_base_parse_frame_new (GstBuffer * buffer,
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GstBaseParseFrameFlags flags,
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gint overhead);
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GST_BASE_API
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void gst_base_parse_frame_init (GstBaseParseFrame * frame);
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GST_BASE_API
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GstBaseParseFrame * gst_base_parse_frame_copy (GstBaseParseFrame * frame);
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GST_BASE_API
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void gst_base_parse_frame_free (GstBaseParseFrame * frame);
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GST_BASE_API
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GstFlowReturn gst_base_parse_push_frame (GstBaseParse * parse,
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GstBaseParseFrame * frame);
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GST_BASE_API
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GstFlowReturn gst_base_parse_finish_frame (GstBaseParse * parse,
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GstBaseParseFrame * frame,
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gint size);
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GST_BASE_API
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void gst_base_parse_set_duration (GstBaseParse * parse,
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GstFormat fmt,
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gint64 duration,
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gint interval);
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GST_BASE_API
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void gst_base_parse_set_average_bitrate (GstBaseParse * parse,
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guint bitrate);
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GST_BASE_API
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void gst_base_parse_set_min_frame_size (GstBaseParse * parse,
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guint min_size);
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GST_BASE_API
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void gst_base_parse_set_has_timing_info (GstBaseParse * parse,
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gboolean has_timing);
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GST_BASE_API
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void gst_base_parse_drain (GstBaseParse * parse);
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GST_BASE_API
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void gst_base_parse_set_syncable (GstBaseParse * parse,
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gboolean syncable);
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GST_BASE_API
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void gst_base_parse_set_passthrough (GstBaseParse * parse,
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gboolean passthrough);
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GST_BASE_API
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void gst_base_parse_set_pts_interpolation (GstBaseParse * parse,
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gboolean pts_interpolate);
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GST_BASE_API
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void gst_base_parse_set_infer_ts (GstBaseParse * parse,
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gboolean infer_ts);
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GST_BASE_API
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void gst_base_parse_set_frame_rate (GstBaseParse * parse,
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guint fps_num,
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guint fps_den,
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guint lead_in,
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guint lead_out);
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GST_BASE_API
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void gst_base_parse_set_latency (GstBaseParse * parse,
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GstClockTime min_latency,
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GstClockTime max_latency);
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GST_BASE_API
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gboolean gst_base_parse_convert_default (GstBaseParse * parse,
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GstFormat src_format,
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gint64 src_value,
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GstFormat dest_format,
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gint64 * dest_value);
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GST_BASE_API
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gboolean gst_base_parse_add_index_entry (GstBaseParse * parse,
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guint64 offset,
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GstClockTime ts,
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gboolean key,
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gboolean force);
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GST_BASE_API
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void gst_base_parse_set_ts_at_offset (GstBaseParse *parse,
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gsize offset);
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GST_BASE_API
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void gst_base_parse_merge_tags (GstBaseParse * parse,
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GstTagList * tags,
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GstTagMergeMode mode);
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#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstBaseParseFrame, gst_base_parse_frame_free)
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#endif
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#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstBaseParse, gst_object_unref)
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#endif
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G_END_DECLS
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#endif /* __GST_BASE_PARSE_H__ */
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