mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-10-06 18:52:07 +00:00
e2bf3647f8
If none of the existing subclasses uses these, there's probably no need to expose them at the moment. Keep the segment itself exposed though. https://bugzilla.gnome.org/show_bug.cgi?id=518857
327 lines
13 KiB
C
327 lines
13 KiB
C
/* GStreamer
|
|
* Copyright (C) 2008 Nokia Corporation. All rights reserved.
|
|
*
|
|
* Contact: Stefan Kost <stefan.kost@nokia.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifndef __GST_BASE_PARSE_H__
|
|
#define __GST_BASE_PARSE_H__
|
|
|
|
#include <gst/gst.h>
|
|
#include <gst/base/gstadapter.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
#define GST_TYPE_BASE_PARSE (gst_base_parse_get_type())
|
|
#define GST_BASE_PARSE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_PARSE,GstBaseParse))
|
|
#define GST_BASE_PARSE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_PARSE,GstBaseParseClass))
|
|
#define GST_BASE_PARSE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_BASE_PARSE,GstBaseParseClass))
|
|
#define GST_IS_BASE_PARSE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_PARSE))
|
|
#define GST_IS_BASE_PARSE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_PARSE))
|
|
#define GST_BASE_PARSE_CAST(obj) ((GstBaseParse *)(obj))
|
|
|
|
/**
|
|
* GST_BASE_PARSE_SRC_PAD:
|
|
* @obj: base parse instance
|
|
*
|
|
* Gives the pointer to the source #GstPad object of the element.
|
|
*
|
|
* Since: 0.10.x
|
|
*/
|
|
#define GST_BASE_PARSE_SRC_PAD(obj) (GST_BASE_PARSE_CAST (obj)->srcpad)
|
|
|
|
/**
|
|
* GST_BASE_PARSE_SINK_PAD:
|
|
* @obj: base parse instance
|
|
*
|
|
* Gives the pointer to the sink #GstPad object of the element.
|
|
*
|
|
* Since: 0.10.x
|
|
*/
|
|
#define GST_BASE_PARSE_SINK_PAD(obj) (GST_BASE_PARSE_CAST (obj)->sinkpad)
|
|
|
|
/**
|
|
* GST_BASE_PARSE_FLOW_DROPPED:
|
|
*
|
|
* A #GstFlowReturn that can be returned from parse_frame to
|
|
* indicate that no output buffer was generated, or from pre_push_buffer to
|
|
* to forego pushing buffer.
|
|
*
|
|
* Since: 0.10.x
|
|
*/
|
|
#define GST_BASE_PARSE_FLOW_DROPPED GST_FLOW_CUSTOM_SUCCESS
|
|
|
|
/**
|
|
* GstBaseParseFrameFlags:
|
|
* @GST_BASE_PARSE_FRAME_FLAG_NONE: no flag
|
|
* @GST_BASE_PARSE_FRAME_FLAG_SYNC: indicates if parsing is 'in sync'
|
|
* @GST_BASE_PARSE_FRAME_FLAG_DRAIN: indicates if parser is 'draining'.
|
|
* That is, leftover data (e.g. in FLUSH or EOS situation) is being parsed.
|
|
* @GST_BASE_PARSE_FRAME_FLAG_NO_FRAME: set to indicate this buffer should not be
|
|
* counted as frame, e.g. if this frame is dependent on a previous one.
|
|
* As it is not counted as a frame, bitrate increases but frame to time
|
|
* conversions are maintained.
|
|
* @GST_BASE_PARSE_FRAME_FLAG_CLIP: @pre_push_buffer can set this to indicate
|
|
* that regular segment clipping can still be performed (as opposed to
|
|
* any custom one having been done).
|
|
*
|
|
* Flags to be used in a #GstBaseParseFrame.
|
|
*
|
|
* Since: 0.10.x
|
|
*/
|
|
typedef enum {
|
|
GST_BASE_PARSE_FRAME_FLAG_NONE = 0,
|
|
GST_BASE_PARSE_FRAME_FLAG_SYNC = (1 << 0),
|
|
GST_BASE_PARSE_FRAME_FLAG_DRAIN = (1 << 1),
|
|
GST_BASE_PARSE_FRAME_FLAG_NO_FRAME = (1 << 2),
|
|
GST_BASE_PARSE_FRAME_FLAG_CLIP = (1 << 3)
|
|
} GstBaseParseFrameFlags;
|
|
|
|
/**
|
|
* GstBaseParseFrame:
|
|
* @buffer: data to check for valid frame or parsed frame.
|
|
* Subclass is allowed to replace this buffer.
|
|
* @overhead: subclass can set this to indicates the metadata overhead
|
|
* for the given frame, which is then used to enable more accurate bitrate
|
|
* computations. If this is -1, it is assumed that this frame should be
|
|
* skipped in bitrate calculation.
|
|
* @flags: a combination of input and output #GstBaseParseFrameFlags that
|
|
* convey additional context to subclass or allow subclass to tune
|
|
* subsequent #GstBaseParse actions.
|
|
*
|
|
* Frame (context) data passed to each frame parsing virtual methods. In
|
|
* addition to providing the data to be checked for a valid frame or an already
|
|
* identified frame, it conveys additional metadata or control information
|
|
* from and to the subclass w.r.t. the particular frame in question (rather
|
|
* than global parameters). Some of these may apply to each parsing stage, others
|
|
* only to some a particular one. These parameters are effectively zeroed at start
|
|
* of each frame's processing, i.e. parsing virtual method invocation sequence.
|
|
*
|
|
* Since: 0.10.x
|
|
*/
|
|
typedef struct {
|
|
GstBuffer * buffer;
|
|
guint flags;
|
|
gint overhead;
|
|
} GstBaseParseFrame;
|
|
|
|
/**
|
|
* GST_BASE_PARSE_FRAME_SYNC:
|
|
* @frame: base parse frame instance
|
|
*
|
|
* Obtains current sync status indicated in frame.
|
|
*
|
|
* Since: 0.10.x
|
|
*/
|
|
#define GST_BASE_PARSE_FRAME_SYNC(frame) (!!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_SYNC))
|
|
|
|
/**
|
|
* GST_BASE_PARSE_FRAME_DRAIN:
|
|
* @frame: base parse frame instance
|
|
*
|
|
* Obtains current drain status indicated in frame.
|
|
*
|
|
* Since: 0.10.x
|
|
*/
|
|
#define GST_BASE_PARSE_FRAME_DRAIN(frame) (!!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_DRAIN))
|
|
|
|
/**
|
|
* GstBaseParseFormat:
|
|
* @GST_BASE_PARSE_FORMAT_NONE: default setting
|
|
* @GST_BASE_PARSE_FORMAT_PASSTHROUGH: nature of format or configuration
|
|
* does not allow (much) parsing, so parser should operate in passthrough mode
|
|
* (which only applies operating in pull mode). That is, incoming buffers
|
|
* are pushed through unmodified, i.e. no @check_valid_frame or @parse_frame
|
|
* callbacks will be invoked. On the other hand, @pre_push_buffer is still invoked,
|
|
* where subclass can perform as much or as little is appropriate for
|
|
* "passthrough" semantics.
|
|
* @GST_BASE_PARSE_FORMAT_HAS_TIME: frames carry timing info which subclass
|
|
* can (generally) parse and provide. In particular, intrinsic time
|
|
* (rather than estimated) can be obtained following seek.
|
|
*
|
|
* Since: 0.10.x
|
|
*/
|
|
typedef enum _GstBaseParseFormat {
|
|
GST_BASE_PARSE_FORMAT_NONE = 0,
|
|
GST_BASE_PARSE_FORMAT_PASSTHROUGH = (1 << 0),
|
|
GST_BASE_PARSE_FORMAT_HAS_TIME = (1 << 1),
|
|
} GstBaseParseFormat;
|
|
|
|
/**
|
|
* GstBaseParseSeekable:
|
|
* @GST_BASE_PARSE_SEEK_NONE: No seeking possible.
|
|
* @GST_BASE_PARSE_SEEK_DEFAULT: Default seeking possible using estimated bitrate.
|
|
* @GST_BASE_PARSE_SEEK_TABLE: Additional metadata provides more accurate seeking.
|
|
*
|
|
* Indicates what level (of quality) of seeking is possible.
|
|
*
|
|
* Since: 0.10.x
|
|
*/
|
|
typedef enum _GstBaseParseSeekable {
|
|
GST_BASE_PARSE_SEEK_NONE,
|
|
GST_BASE_PARSE_SEEK_DEFAULT,
|
|
GST_BASE_PARSE_SEEK_TABLE
|
|
} GstBaseParseSeekable;
|
|
|
|
typedef struct _GstBaseParse GstBaseParse;
|
|
typedef struct _GstBaseParseClass GstBaseParseClass;
|
|
typedef struct _GstBaseParsePrivate GstBaseParsePrivate;
|
|
|
|
/**
|
|
* GstBaseParse:
|
|
* @element: the parent element.
|
|
*
|
|
* The opaque #GstBaseParse data structure.
|
|
*/
|
|
struct _GstBaseParse {
|
|
GstElement element;
|
|
GstAdapter *adapter;
|
|
|
|
/*< protected >*/
|
|
/* source and sink pads */
|
|
GstPad *sinkpad;
|
|
GstPad *srcpad;
|
|
|
|
/* MT-protected (with STREAM_LOCK) */
|
|
GstSegment segment;
|
|
|
|
/*< private >*/
|
|
gpointer _gst_reserved[GST_PADDING_LARGE];
|
|
GstBaseParsePrivate *priv;
|
|
};
|
|
|
|
/**
|
|
* GstBaseParseClass:
|
|
* @start: Optional.
|
|
* Called when the element starts processing.
|
|
* Allows opening external resources.
|
|
* @stop: Optional.
|
|
* Called when the element stops processing.
|
|
* Allows closing external resources.
|
|
* @set_sink_caps: allows the subclass to be notified of the actual caps set.
|
|
* @check_valid_frame: Check if the given piece of data contains a valid
|
|
* frame.
|
|
* @parse_frame: Parse the already checked frame. Subclass need to
|
|
* set the buffer timestamp, duration, caps and possibly
|
|
* other necessary metadata. This is called with srcpad's
|
|
* STREAM_LOCK held.
|
|
* @convert: Optional.
|
|
* Convert between formats.
|
|
* @event: Optional.
|
|
* Event handler on the sink pad. This function should return
|
|
* TRUE if the event was handled and can be dropped.
|
|
* @src_event: Optional.
|
|
* Event handler on the source pad. Should return TRUE
|
|
* if the event was handled and can be dropped.
|
|
*
|
|
* @pre_push_frame: Optional.
|
|
* Called just prior to pushing a frame (after any pending
|
|
* events have been sent) to give subclass a chance to perform
|
|
* additional actions at this time (e.g. tag sending) or to
|
|
* decide whether this buffer should be dropped or not
|
|
* (e.g. custom segment clipping).
|
|
*
|
|
* Subclasses can override any of the available virtual methods or not, as
|
|
* needed. At minimum @check_valid_frame and @parse_frame needs to be
|
|
* overridden.
|
|
*/
|
|
struct _GstBaseParseClass {
|
|
GstElementClass parent_class;
|
|
|
|
/*< public >*/
|
|
/* virtual methods for subclasses */
|
|
|
|
gboolean (*start) (GstBaseParse * parse);
|
|
|
|
gboolean (*stop) (GstBaseParse * parse);
|
|
|
|
gboolean (*set_sink_caps) (GstBaseParse * parse,
|
|
GstCaps * caps);
|
|
|
|
gboolean (*check_valid_frame) (GstBaseParse * parse,
|
|
GstBaseParseFrame * frame,
|
|
guint * framesize,
|
|
gint * skipsize);
|
|
|
|
GstFlowReturn (*parse_frame) (GstBaseParse * parse,
|
|
GstBaseParseFrame * frame);
|
|
|
|
GstFlowReturn (*pre_push_frame) (GstBaseParse * parse,
|
|
GstBaseParseFrame * frame);
|
|
|
|
gboolean (*convert) (GstBaseParse * parse,
|
|
GstFormat src_format,
|
|
gint64 src_value,
|
|
GstFormat dest_format,
|
|
gint64 * dest_value);
|
|
|
|
gboolean (*event) (GstBaseParse * parse,
|
|
GstEvent * event);
|
|
|
|
gboolean (*src_event) (GstBaseParse * parse,
|
|
GstEvent * event);
|
|
|
|
/*< private >*/
|
|
gpointer _gst_reserved[GST_PADDING_LARGE];
|
|
};
|
|
|
|
GType gst_base_parse_get_type (void);
|
|
|
|
void gst_base_parse_frame_init (GstBaseParse * parse,
|
|
GstBaseParseFrame * frame);
|
|
|
|
GstFlowReturn gst_base_parse_push_frame (GstBaseParse * parse,
|
|
GstBaseParseFrame * frame);
|
|
|
|
void gst_base_parse_set_duration (GstBaseParse * parse,
|
|
GstFormat fmt,
|
|
gint64 duration,
|
|
gint interval);
|
|
|
|
void gst_base_parse_set_seek (GstBaseParse * parse,
|
|
GstBaseParseSeekable seek,
|
|
guint bitrate);
|
|
|
|
void gst_base_parse_set_min_frame_size (GstBaseParse * parse,
|
|
guint min_size);
|
|
|
|
void gst_base_parse_set_format (GstBaseParse * parse,
|
|
GstBaseParseFormat flag,
|
|
gboolean on);
|
|
|
|
void gst_base_parse_set_frame_props (GstBaseParse * parse,
|
|
guint fps_num,
|
|
guint fps_den,
|
|
guint lead_in,
|
|
guint lead_out);
|
|
|
|
gboolean gst_base_parse_convert_default (GstBaseParse * parse,
|
|
GstFormat src_format,
|
|
gint64 src_value,
|
|
GstFormat dest_format,
|
|
gint64 * dest_value);
|
|
|
|
gboolean gst_base_parse_add_index_entry (GstBaseParse * parse,
|
|
guint64 offset,
|
|
GstClockTime ts,
|
|
gboolean key,
|
|
gboolean force);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_BASE_PARSE_H__ */
|