gstreamer/gst/gstbuffer.h

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstbuffer.h: Header for GstBuffer object
*
* 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_BUFFER_H__
#define __GST_BUFFER_H__
/*
* Define this to add file:line info to each GstBuffer showing
* the location in the source code where the buffer was created.
*
* #define GST_BUFFER_WHERE
*
* Then in gdb, you can `call gst_buffer_print_live()' to get a list
* of allocated GstBuffers and also the file:line where they were
* allocated.
*/
#include <gst/gstdata.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_ATOMIC_H
#include <asm/atomic.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
extern GType _gst_buffer_type;
#define GST_TYPE_BUFFER (_gst_buffer_type)
#define GST_BUFFER(buf) ((GstBuffer *)(buf))
#define GST_IS_BUFFER(buf) (GST_DATA_TYPE(buf) == GST_TYPE_BUFFER)
#define GST_BUFFER_FLAGS(buf) (GST_BUFFER(buf)->flags)
#define GST_BUFFER_FLAG_IS_SET(buf,flag) (GST_BUFFER_FLAGS(buf) & (1<<(flag)))
#define GST_BUFFER_FLAG_SET(buf,flag) G_STMT_START{ (GST_BUFFER_FLAGS(buf) |= (1<<(flag))); }G_STMT_END
#define GST_BUFFER_FLAG_UNSET(buf,flag) G_STMT_START{ (GST_BUFFER_FLAGS(buf) &= ~(1<<(flag))); }G_STMT_END
#define GST_BUFFER_DATA(buf) (GST_BUFFER(buf)->data)
#define GST_BUFFER_SIZE(buf) (GST_BUFFER(buf)->size)
#define GST_BUFFER_OFFSET(buf) (GST_BUFFER(buf)->offset)
#define GST_BUFFER_MAXSIZE(buf) (GST_BUFFER(buf)->maxsize)
#define GST_BUFFER_TIMESTAMP(buf) (GST_BUFFER(buf)->timestamp)
#define GST_BUFFER_MAXAGE(buf) (GST_BUFFER(buf)->maxage)
#define GST_BUFFER_BUFFERPOOL(buf) (GST_BUFFER(buf)->pool)
#define GST_BUFFER_PARENT(buf) (GST_BUFFER(buf)->parent)
#define GST_BUFFER_POOL_PRIVATE(buf) (GST_BUFFER(buf)->pool_private)
#define GST_BUFFER_COPY_FUNC(buf) (GST_BUFFER(buf)->copy)
#define GST_BUFFER_FREE_FUNC(buf) (GST_BUFFER(buf)->free)
#define GST_BUFFER_LOCK(buf) (g_mutex_lock(GST_BUFFER(buf)->lock))
#define GST_BUFFER_TRYLOCK(buf) (g_mutex_trylock(GST_BUFFER(buf)->lock))
#define GST_BUFFER_UNLOCK(buf) (g_mutex_unlock(GST_BUFFER(buf)->lock))
typedef enum {
GST_BUFFER_READONLY,
WARNING: Don't grab this updated unless you're really, REALLY sure. Original commit message from CVS: WARNING: Don't grab this updated unless you're really, REALLY sure. WARNING: Wait for the next one. Whole lotta changes here, including a few random bits: examples/*/Makefile: updated to use `libtool gcc`, not just `gcc` gst/ gstbuffer.h: updated to new flag style gst.c, gstdebug.h: added new debugging for function ptrs gstpipeline.c: set type of parent_class to the class, not the object gstthread.c: ditto plugins/ cdparanoia/cdparanoia.c: added an argument type, updated some defaults cobin/spindentity.c: updated to new do/while loopfunction style mp3encode/lame/gstlame.c: argument types, whole lotta lame options tests/: various changes Now, for the big changes: Once again, the scheduling system has changed. And once again, it broke a whole bunch of things. The gist of the change is that there is now a function pointer for gst_pad_push and gst_pad_pull, instead of a hard-wired function. Well, currently they are functions, but that's for debugging purposes only, they just call the function pointer after spewing lots of DEBUG(). This changed the GstPad structure a bit, and the GstPad API as well. Where elements used to provide chain() and pull() functions, they provide chain() and get() functions. gst_pad_set_pull[region]_function has been changed to get_pad_set_get[region]_function. This means all the elements out there that used to have pull functions need to be updated. The calls to that function have been changed in the normal elements, but the names of the functions passed is still _pull[region](), which is an aesthetic issue more than anything. As for what doesn't work yet, just about anything dealing with Connections is hosed, meaning threaded stuff won't work. This will be fixed about 12 hours from now, after I've slept, etc. The simplefake.c test works in both cothreaded and chained cases, but not much else will work due to the Connection problem. Needless to say, don't grab this unless you *need* these features *now*, else wait to update this stuff until tomorrow. I'm going to sleep now.
2000-12-16 10:18:09 +00:00
GST_BUFFER_ORIGINAL,
GST_BUFFER_DONTFREE,
} GstBufferFlag;
typedef struct _GstBuffer GstBuffer;
typedef void (*GstBufferFreeFunc) (GstBuffer *buf);
typedef GstBuffer *(*GstBufferCopyFunc) (GstBuffer *srcbuf);
#include <gst/gstbufferpool.h>
struct _GstBuffer {
GstData data_type;
/* locking */
GMutex *lock;
/* refcounting */
#ifdef HAVE_ATOMIC_H
atomic_t refcount;
#define GST_BUFFER_REFCOUNT(buf) (atomic_read(&(GST_BUFFER((buf))->refcount)))
#else
int refcount;
#define GST_BUFFER_REFCOUNT(buf) (GST_BUFFER(buf)->refcount)
#endif
/* flags */
guint16 flags; /* boolean properties of buffer */
/* pointer to data, its size, and offset in original source if known */
guchar *data;
guint32 size;
guint32 maxsize;
guint32 offset;
/* timestamp */
gint64 timestamp; /* nanoseconds since zero */
gint64 maxage; /* FIXME: not used yet */
/* subbuffer support, who's my parent? */
GstBuffer *parent;
/* this is a pointer to the buffer pool (if any) */
GstBufferPool *pool;
gpointer pool_private;
/* utility function pointers, can override default */
GstBufferFreeFunc free; /* free the data associated with the buffer */
GstBufferCopyFunc copy; /* copy the data from one buffer to another */
};
/* initialisation */
void _gst_buffer_initialize (void);
/* creating a new buffer from scratch */
GstBuffer* gst_buffer_new (void);
GstBuffer* gst_buffer_new_from_pool (GstBufferPool *pool, guint32 offset, guint32 size);
/* creating a subbuffer */
GstBuffer* gst_buffer_create_sub (GstBuffer *parent, guint32 offset, guint32 size);
/* refcounting */
void gst_buffer_ref (GstBuffer *buffer);
void gst_buffer_ref_by_count (GstBuffer *buffer, gint count);
void gst_buffer_unref (GstBuffer *buffer);
/* destroying the buffer */
void gst_buffer_destroy (GstBuffer *buffer);
/* copy buffer */
GstBuffer* gst_buffer_copy (GstBuffer *buffer);
/* merge, span, or append two buffers, intelligently */
GstBuffer* gst_buffer_merge (GstBuffer *buf1, GstBuffer *buf2);
GstBuffer* gst_buffer_span (GstBuffer *buf1, guint32 offset, GstBuffer *buf2, guint32 len);
GstBuffer* gst_buffer_append (GstBuffer *buffer, GstBuffer *append);
gboolean gst_buffer_is_span_fast (GstBuffer *buf1, GstBuffer *buf2);
This is an attempt at not segfaulting on errors but reporting some usefull info instead. Original commit message from CVS: This is an attempt at not segfaulting on errors but reporting some usefull info instead. - bin changes so errors can propagate. - changed the _FAST macros to _CAST because that is what they do. - removed all references to cothreads out of the core, they are really a scheduler issue, handler with a sched_private gpointer. - added a live buffer count, for debugging buffer leaks. - added error checking in gst_scheduler_state_transition this solves the "out of cothreads" problem. - GST_ELEMENT_NO_ENTRY == GST_ELEMENT_INFINITE_LOOP - added 2 private element flasg for use by the scheduler (_COTHREAD_STOPPING) is now - added scheduler entry points: - _yield : to create possible scheduling points. - _interrupt: to stop execution of an element. - _error: to signal en error condition to the scheduler. - improved error messages for pads. - signal gst_element_error where appropriate. - added the a new bin to the parent before entering it so one can reference its children. - queue memleak fixes on dispose. - added possible deadlock detection in queue (turned off be default) - GstBasicScheduler is a real class of its own now, hiding its internal variables. - GST_ELEMENT_IS_COTHREAD_STOPPING is gone. either call explicit _yield operations, or make a sane loop. - Better state change handling in filesrc. Better error reporting/recovery too. - updated core plugins. - detect non decoupled elements on scheduler boundries and error.
2001-12-22 21:18:17 +00:00
void gst_buffer_print_stats (void);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_BUFFER_H__ */