gstreamer/gst/mpegstream/gstmpegpacketize.h

/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 *
 * 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 __MPEGPACKETIZE_H__
#define __MPEGPACKETIZE_H__


#include <gst/gst.h>

G_BEGIN_DECLS

#define PICTURE_START_CODE              0x00
#define SLICE_MIN_START_CODE            0x01
#define SLICE_MAX_START_CODE            0xaf
#define USER_START_CODE                 0xb2
#define SEQUENCE_START_CODE             0xb3
#define SEQUENCE_ERROR_START_CODE       0xb4
#define EXT_START_CODE                  0xb5
#define SEQUENCE_END_START_CODE         0xb7
#define GOP_START_CODE                  0xb8

#define ISO11172_END_START_CODE         0xb9
#define PACK_START_CODE                 0xba
#define SYS_HEADER_START_CODE           0xbb

typedef struct _GstMPEGPacketize GstMPEGPacketize;

#define GST_MPEG_PACKETIZE_ID(pack)             ((pack)->id)
#define GST_MPEG_PACKETIZE_IS_MPEG2(pack)       ((pack)->MPEG2)

typedef enum {
  GST_MPEG_PACKETIZE_SYSTEM,
  GST_MPEG_PACKETIZE_VIDEO,
} GstMPEGPacketizeType;

struct _GstMPEGPacketize {
  /* current parse state */
  guchar id;

  GstPad *srcpad;
  GstMPEGPacketizeType type;

  guint8 *cache;            /* cache for incoming data */
  guint cache_size;         /* allocated size of the cache */
  guint cache_head;         /* position of the beginning of the data */
  guint cache_tail;         /* position of the end of the data in the cache */
  guint64 cache_byte_pos;   /* byte position of the cache in the MPEG stream */

  gboolean MPEG2;
  gboolean resync;
};

GstMPEGPacketize* gst_mpeg_packetize_new     (GstPad *pad, GstMPEGPacketizeType type);
void              gst_mpeg_packetize_destroy (GstMPEGPacketize *packetize);

guint64           gst_mpeg_packetize_tell    (GstMPEGPacketize *packetize);
gboolean          gst_mpeg_packetize_put     (GstMPEGPacketize *packetize, GstBuffer * buf);
GstFlowReturn     gst_mpeg_packetize_read    (GstMPEGPacketize *packetize, GstBuffer ** outbuf);

G_END_DECLS

#endif /* __MPEGPACKETIZE_H__ */