mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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bd13c9eb8e
Original commit message from CVS: Sync with my copy before wtay starts hacking... Decided to keep the GstBuffer name through most code because it's really messy otherwise, and it doesn't really mean much either way. Saves lots of stupid casting. fakesrc num_buffers=N ! fakesink ends with a segfault on EOS right now, not tracked down yet.
171 lines
4.9 KiB
C
171 lines
4.9 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstbuffer.h: Header for GstBuffer object
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_BUFFER_H__
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#define __GST_BUFFER_H__
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#include <gst/gstdata.h>
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#include <gst/gstobject.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_ATOMIC_H
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#include <asm/atomic.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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extern GType _gst_buffer_type;
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#define GST_TYPE_BUFFER (_gst_buffer_type)
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#define GST_BUFFER(buf) ((GstBuffer *)(buf))
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#define GST_IS_BUFFER(buf) (GST_DATA_TYPE(buf) == GST_TYPE_BUFFER)
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#define GST_BUFFER_FLAGS(buf) \
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(GST_BUFFER(buf)->flags)
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#define GST_BUFFER_FLAG_IS_SET(buf,flag) \
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(GST_BUFFER_FLAGS(buf) & (1<<(flag)))
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#define GST_BUFFER_FLAG_SET(buf,flag) \
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G_STMT_START{ (GST_BUFFER_FLAGS(buf) |= (1<<(flag))); }G_STMT_END
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#define GST_BUFFER_FLAG_UNSET(buf,flag) \
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G_STMT_START{ (GST_BUFFER_FLAGS(buf) &= ~(1<<(flag))); }G_STMT_END
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#define GST_BUFFER_DATA(buf) (GST_BUFFER(buf)->data)
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#define GST_BUFFER_SIZE(buf) (GST_BUFFER(buf)->size)
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#define GST_BUFFER_OFFSET(buf) (GST_BUFFER(buf)->offset)
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#define GST_BUFFER_MAXSIZE(buf) (GST_BUFFER(buf)->maxsize)
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#define GST_BUFFER_TIMESTAMP(buf) (GST_BUFFER(buf)->timestamp)
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#define GST_BUFFER_MAXAGE(buf) (GST_BUFFER(buf)->maxage)
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#define GST_BUFFER_BUFFERPOOL(buf) (GST_BUFFER(buf)->pool)
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#define GST_BUFFER_PARENT(buf) (GST_BUFFER(buf)->parent)
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#define GST_BUFFER_POOL_PRIVATE(buf) (GST_BUFFER(buf)->pool_private)
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#define GST_BUFFER_COPY_FUNC(buf) (GST_BUFFER(buf)->copy)
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#define GST_BUFFER_FREE_FUNC(buf) (GST_BUFFER(buf)->free)
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#define GST_BUFFER_LOCK(buf) (g_mutex_lock(GST_BUFFER(buf)->lock))
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#define GST_BUFFER_TRYLOCK(buf) (g_mutex_trylock(GST_BUFFER(buf)->lock))
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#define GST_BUFFER_UNLOCK(buf) (g_mutex_unlock(GST_BUFFER(buf)->lock))
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typedef enum {
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GST_BUFFER_READONLY,
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GST_BUFFER_ORIGINAL,
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GST_BUFFER_DONTFREE,
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GST_BUFFER_FLUSH,
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GST_BUFFER_EOS,
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GST_BUFFER_DISCONTINUOUS,
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} GstBufferFlags;
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typedef struct _GstBuffer GstBuffer;
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typedef void (*GstBufferFreeFunc) (GstBuffer *buf);
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typedef void (*GstBufferCopyFunc) (GstBuffer *srcbuf,GstBuffer *dstbuf);
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#include <gst/gstbufferpool.h>
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struct _GstBuffer {
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GstData data_type;
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/* locking */
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GMutex *lock;
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/* refcounting */
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#ifdef HAVE_ATOMIC_H
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atomic_t refcount;
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#define GST_BUFFER_REFCOUNT(buf) (atomic_read(&(GST_BUFFER((buf))->refcount)))
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#else
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int refcount;
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#define GST_BUFFER_REFCOUNT(buf) (GST_BUFFER(buf)->refcount)
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#endif
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/* flags */
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guint16 flags;
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/* pointer to data, its size, and offset in original source if known */
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guchar *data;
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guint32 size;
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guint32 maxsize;
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guint32 offset;
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/* timestamp */
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gint64 timestamp;
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/* max age */
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gint64 maxage;
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/* subbuffer support, who's my parent? */
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GstBuffer *parent;
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/* this is a pointer to the buffer pool (if any) */
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GstBufferPool *pool;
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gpointer pool_private;
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/* utility function pointers */
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GstBufferFreeFunc free; // free the data associated with the buffer
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GstBufferCopyFunc copy; // copy the data from one buffer to another
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};
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/* initialisation */
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void _gst_buffer_initialize (void);
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/* creating a new buffer from scratch */
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GstBuffer* gst_buffer_new (void);
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GstBuffer* gst_buffer_new_from_pool (GstBufferPool *pool, guint64 location, gint size);
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/* creating a subbuffer */
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GstBuffer* gst_buffer_create_sub (GstBuffer *parent, guint32 offset, guint32 size);
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/* refcounting */
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void gst_buffer_ref (GstBuffer *buffer);
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void gst_buffer_ref_by_count (GstBuffer *buffer, int count);
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void gst_buffer_unref (GstBuffer *buffer);
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/* destroying the buffer */
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void gst_buffer_destroy (GstBuffer *buffer);
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/* copy buffer */
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GstBuffer* gst_buffer_copy (GstBuffer *buffer);
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/* merge, span, or append two buffers, intelligently */
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GstBuffer* gst_buffer_merge (GstBuffer *buf1, GstBuffer *buf2);
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GstBuffer* gst_buffer_span (GstBuffer *buf1,guint32 offset,GstBuffer *buf2,guint32 len);
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GstBuffer* gst_buffer_append (GstBuffer *buf, GstBuffer *buf2);
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gboolean gst_buffer_is_span_fast (GstBuffer *buf1, GstBuffer *buf2);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_BUFFER_H__ */
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