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__
#include <gst/gstdata.h>
#include <gst/gstclock.h>
G_BEGIN_DECLS
typedef struct _GstBuffer GstBuffer;
typedef struct _GstBufferPool GstBufferPool;
#define GST_BUFFER_TRACE_NAME "GstBuffer"
#define GST_BUFFER_POOL_TRACE_NAME "GstBufferPool"
extern GType _gst_buffer_type;
extern GType _gst_buffer_pool_type;
#define GST_TYPE_BUFFER (_gst_buffer_type)
#define GST_TYPE_BUFFER_POOL (_gst_buffer_pool_type)
#define GST_BUFFER(buf) ((GstBuffer *)(buf))
#define GST_BUFFER_POOL(pool) ((GstBufferPool *)(pool))
#define GST_IS_BUFFER(buf) (GST_DATA_TYPE(buf) == GST_TYPE_BUFFER)
#define GST_IS_BUFFER_POOL(buf) (GST_DATA_TYPE(buf) == GST_TYPE_BUFFER_POOL)
#define GST_BUFFER_REFCOUNT(buf) GST_DATA_REFCOUNT(buf)
#define GST_BUFFER_REFCOUNT_VALUE(buf) GST_DATA_REFCOUNT_VALUE(buf)
#define GST_BUFFER_COPY_FUNC(buf) GST_DATA_COPY_FUNC(buf)
#define GST_BUFFER_FREE_FUNC(buf) GST_DATA_FREE_FUNC(buf)
#define GST_BUFFER_FLAGS(buf) GST_DATA_FLAGS(buf)
#define GST_BUFFER_FLAG_IS_SET(buf,flag) GST_DATA_FLAG_IS_SET (buf, flag)
#define GST_BUFFER_FLAG_SET(buf,flag) GST_DATA_FLAG_SET (buf, flag)
#define GST_BUFFER_FLAG_UNSET(buf,flag) GST_DATA_FLAG_UNSET (buf, flag)
#define GST_BUFFER_DATA(buf) (GST_BUFFER(buf)->data)
#define GST_BUFFER_SIZE(buf) (GST_BUFFER(buf)->size)
#define GST_BUFFER_MAXSIZE(buf) (GST_BUFFER(buf)->maxsize)
#define GST_BUFFER_TIMESTAMP(buf) (GST_BUFFER(buf)->timestamp)
#define GST_BUFFER_DURATION(buf) (GST_BUFFER(buf)->duration)
#define GST_BUFFER_FORMAT(buf) (GST_BUFFER(buf)->format)
#define GST_BUFFER_OFFSET(buf) (GST_BUFFER(buf)->offset)
#define GST_BUFFER_BUFFERPOOL(buf) (GST_BUFFER(buf)->pool)
#define GST_BUFFER_POOL_PRIVATE(buf) (GST_BUFFER(buf)->pool_private)
#define GST_BUFFER_OFFSET_NONE ((guint64)-1)
#define GST_BUFFER_MAXSIZE_NONE ((guint)0)
#define GST_BUFFER_DURATION_IS_VALID(buffer) (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_DURATION (buffer)))
#define GST_BUFFER_TIMESTAMP_IS_VALID(buffer) (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buffer)))
#define GST_BUFFER_OFFSET_IS_VALID(buffer) (GST_BUFFER_OFFSET (buffer) != GST_BUFFER_OFFSET_NONE)
#define GST_BUFFER_MAXSIZE_IS_VALID(buffer) (GST_BUFFER_MAXSIZE (buffer) != GST_BUFFER_MAXSIZE_NONE)
typedef enum {
GST_BUFFER_READONLY = GST_DATA_READONLY,
GST_BUFFER_SUBBUFFER = GST_DATA_FLAG_LAST,
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,
GST_BUFFER_DISCONTINUOUS,
GST_BUFFER_KEY_UNIT,
GST_BUFFER_PREROLL,
GST_BUFFER_FLAG_LAST = GST_DATA_FLAG_LAST + 8
} GstBufferFlag;
struct _GstBuffer {
GstData data_type;
/* pointer to data and its size */
guint8 *data; /* pointer to buffer data */
guint size; /* size of buffer data */
guint maxsize; /* max size of this buffer */
/* timestamp */
GstClockTime timestamp;
GstClockTime duration;
/* media specific offset
* for video frames, this could be the number of frames,
* for audio data, this could be the number of audio samples,
* for file data or compressed data, this could be the number of bytes
*/
guint64 offset;
/* this is a pointer to the buffer pool (if any) */
GstBufferPool *pool;
/* pointer to pool private data of parent buffer in case of a subbuffer */
gpointer pool_private;
GST_STRUCT_PADDING
};
/* bufferpools */
typedef GstBuffer* (*GstBufferPoolBufferNewFunction) (GstBufferPool *pool, guint64 offset,
guint size, gpointer user_data);
typedef GstBuffer* (*GstBufferPoolBufferCopyFunction) (GstBufferPool *pool,
const GstBuffer *buffer,
gpointer user_data);
typedef void (*GstBufferPoolBufferFreeFunction) (GstBufferPool *pool,
GstBuffer *buffer,
gpointer user_data);
struct _GstBufferPool {
GstData data;
gboolean active;
GstBufferPoolBufferNewFunction buffer_new;
GstBufferPoolBufferCopyFunction buffer_copy;
GstBufferPoolBufferFreeFunction buffer_free;
gpointer user_data;
GST_STRUCT_PADDING
};
/* allocation */
GType gst_buffer_get_type (void);
GstBuffer* gst_buffer_new (void);
GstBuffer* gst_buffer_new_and_alloc (guint size);
/* creating a new buffer from a pool */
GstBuffer* gst_buffer_new_from_pool (GstBufferPool *pool,
guint64 offset, guint size);
#define gst_buffer_set_data(buf, data, size) \
G_STMT_START { \
GST_BUFFER_DATA (buf) = data; \
GST_BUFFER_SIZE (buf) = size; \
} G_STMT_END
/* refcounting */
#define gst_buffer_ref(buf) GST_BUFFER (gst_data_ref (GST_DATA (buf)))
#define gst_buffer_ref_by_count(buf,c) GST_BUFFER (gst_data_ref_by_count (GST_DATA (buf), c))
#define gst_buffer_unref(buf) gst_data_unref (GST_DATA (buf))
/* copy buffer */
#define gst_buffer_copy(buf) GST_BUFFER (gst_data_copy (GST_DATA (buf)))
#define gst_buffer_is_writable(buf) gst_data_is_writable (GST_DATA (buf))
#define gst_buffer_copy_on_write(buf) GST_BUFFER (gst_data_copy_on_write (GST_DATA (buf)))
#define gst_buffer_free(buf) gst_data_free (GST_DATA (buf))
/* creating a subbuffer */
GstBuffer* gst_buffer_create_sub (GstBuffer *parent, guint offset, guint size);
/* merge, span, or append two buffers, intelligently */
GstBuffer* gst_buffer_merge (GstBuffer *buf1, GstBuffer *buf2);
gboolean gst_buffer_is_span_fast (GstBuffer *buf1, GstBuffer *buf2);
GstBuffer* gst_buffer_span (GstBuffer *buf1, guint32 offset, GstBuffer *buf2, guint32 len);
/* --- private --- */
void _gst_buffer_initialize (void);
/* functions used by subclasses and bufferpools */
void gst_buffer_default_free (GstBuffer *buffer);
GstBuffer* gst_buffer_default_copy (GstBuffer *buffer);
/* creating a new buffer pools */
GType gst_buffer_pool_get_type (void);
GstBufferPool* gst_buffer_pool_new (GstDataFreeFunction free,
GstDataCopyFunction copy,
GstBufferPoolBufferNewFunction buffer_new,
GstBufferPoolBufferCopyFunction buffer_copy,
GstBufferPoolBufferFreeFunction buffer_free,
gpointer user_data);
/* function used by subclasses and bufferpools */
void gst_buffer_pool_default_free (GstBufferPool *pool);
/* check if pool is usable */
gboolean gst_buffer_pool_is_active (GstBufferPool *pool);
void gst_buffer_pool_set_active (GstBufferPool *pool, gboolean active);
#define gst_buffer_pool_ref(pool) GST_BUFFER_POOL (gst_data_ref (GST_DATA (pool)))
#define gst_buffer_pool_ref_by_count(pool,c) GST_BUFFER_POOL (gst_data_ref_by_count (GST_DATA (pool), c))
#define gst_buffer_pool_unref(pool) gst_data_unref (GST_DATA (pool))
/* bufferpool operations */
#define gst_buffer_pool_copy(pool) GST_BUFFER_POOL (gst_data_copy (GST_DATA (pool)))
#define gst_buffer_pool_is_writable(pool) GST_BUFFER_POOL (gst_data_is_writable (GST_DATA (pool)))
#define gst_buffer_pool_copy_on_write(pool) GST_BUFFER_POOL (gst_data_copy_on_write (GST_DATA (pool)))
#define gst_buffer_pool_free(pool) gst_data_free (GST_DATA (pool))
void gst_buffer_pool_set_user_data (GstBufferPool *pool, gpointer user_data);
gpointer gst_buffer_pool_get_user_data (GstBufferPool *pool);
G_END_DECLS
#endif /* __GST_BUFFER_H__ */