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/*
* mpegtspacketizer.h -
* Copyright (C) 2007 Alessandro Decina
*
* Authors:
* Alessandro Decina <alessandro@nnva.org>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef GST_MPEGTS_PACKETIZER_H
#define GST_MPEGTS_PACKETIZER_H
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <glib.h>
#include <gst/mpegts/mpegts.h>
#include "gstmpegdefs.h"
#define MPEGTS_NORMAL_PACKETSIZE 188
#define MPEGTS_M2TS_PACKETSIZE 192
#define MPEGTS_DVB_ASI_PACKETSIZE 204
#define MPEGTS_ATSC_PACKETSIZE 208
#define MPEGTS_MIN_PACKETSIZE MPEGTS_NORMAL_PACKETSIZE
#define MPEGTS_MAX_PACKETSIZE MPEGTS_ATSC_PACKETSIZE
#define MPEGTS_AFC_DISCONTINUITY_FLAG 0x80
#define MPEGTS_AFC_RANDOM_ACCES_FLAGS 0x40
#define MPEGTS_AFC_ELEMENTARY_STREAM_PRIORITY 0x20
#define MPEGTS_AFC_PCR_FLAG 0x10
#define MPEGTS_AFC_OPCR_FLAG 0x08
#define MPEGTS_AFC_SPLICING_POINT_FLAG 0x04
#define MPEGTS_AFC_TRANSPORT_PRIVATE_DATA_FLAG 0x02
#define MPEGTS_AFC_EXTENSION_FLAG 0x01
#define MAX_WINDOW 512
G_BEGIN_DECLS
#define GST_TYPE_MPEGTS_PACKETIZER \
(mpegts_packetizer_get_type())
#define GST_MPEGTS_PACKETIZER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MPEGTS_PACKETIZER,MpegTSPacketizer2))
#define GST_MPEGTS_PACKETIZER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MPEGTS_PACKETIZER,MpegTSPacketizer2Class))
#define GST_IS_MPEGTS_PACKETIZER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MPEGTS_PACKETIZER))
#define GST_IS_MPEGTS_PACKETIZER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MPEGTS_PACKETIZER))
typedef struct _MpegTSPacketizer2 MpegTSPacketizer2;
typedef struct _MpegTSPacketizer2Class MpegTSPacketizer2Class;
typedef struct _MpegTSPacketizerPrivate MpegTSPacketizerPrivate;
typedef struct
{
guint16 pid;
guint continuity_counter;
/* Section data (always newly allocated) */
guint8 *section_data;
/* Current offset in section_data */
guint16 section_offset;
/* Values for pending section */
/* table_id of the pending section_data */
guint8 table_id;
guint section_length;
guint8 version_number;
guint16 subtable_extension;
guint8 section_number;
guint8 last_section_number;
GSList *subtables;
/* Upstream offset of the data contained in the section */
guint64 offset;
} MpegTSPacketizerStream;
struct _MpegTSPacketizer2 {
GObject parent;
GstAdapter *adapter;
/* streams hashed by pid */
/* FIXME : be more memory efficient (see how it's done in mpegtsbase) */
MpegTSPacketizerStream **streams;
gboolean disposed;
guint16 packet_size;
/* current offset of the tip of the adapter */
guint64 offset;
gboolean empty;
/* clock skew calculation */
gboolean calculate_skew;
/* offset/bitrate calculator */
gboolean calculate_offset;
MpegTSPacketizerPrivate *priv;
};
struct _MpegTSPacketizer2Class {
GObjectClass object_class;
};
#define FLAGS_SCRAMBLED(f) (f & 0xc0)
#define FLAGS_HAS_AFC(f) (f & 0x20)
#define FLAGS_HAS_PAYLOAD(f) (f & 0x10)
#define FLAGS_CONTINUITY_COUNTER(f) (f & 0x0f)
typedef struct
{
gint16 pid;
guint8 payload_unit_start_indicator;
guint8 scram_afc_cc;
guint8 *payload;
guint8 *data_start;
guint8 *data_end;
guint8 *data;
guint8 afc_flags;
guint64 pcr;
guint64 offset;
} MpegTSPacketizerPacket;
typedef struct
{
guint8 table_id;
/* the spec says sub_table_extension is the fourth and fifth byte of a
* section when the section_syntax_indicator is set to a value of "1". If
* section_syntax_indicator is 0, sub_table_extension will be set to 0 */
guint16 subtable_extension;
guint8 version_number;
guint8 last_section_number;
/* table of bits, whether the section was seen or not.
* Use MPEGTS_BIT_* macros to check */
/* Size is 32, because there's a maximum of 256 (32*8) section_number */
guint8 seen_section[32];
} MpegTSPacketizerStreamSubtable;
#define MPEGTS_BIT_SET(field, offs) ((field)[(offs) >> 3] |= (1 << ((offs) & 0x7)))
#define MPEGTS_BIT_UNSET(field, offs) ((field)[(offs) >> 3] &= ~(1 << ((offs) & 0x7)))
#define MPEGTS_BIT_IS_SET(field, offs) ((field)[(offs) >> 3] & (1 << ((offs) & 0x7)))
typedef enum {
PACKET_BAD = FALSE,
PACKET_OK = TRUE,
PACKET_NEED_MORE
} MpegTSPacketizerPacketReturn;
G_GNUC_INTERNAL GType mpegts_packetizer_get_type(void);
G_GNUC_INTERNAL MpegTSPacketizer2 *mpegts_packetizer_new (void);
G_GNUC_INTERNAL void mpegts_packetizer_clear (MpegTSPacketizer2 *packetizer);
G_GNUC_INTERNAL void mpegts_packetizer_flush (MpegTSPacketizer2 *packetizer, gboolean hard);
G_GNUC_INTERNAL void mpegts_packetizer_push (MpegTSPacketizer2 *packetizer, GstBuffer *buffer);
G_GNUC_INTERNAL gboolean mpegts_packetizer_has_packets (MpegTSPacketizer2 *packetizer);
G_GNUC_INTERNAL MpegTSPacketizerPacketReturn mpegts_packetizer_next_packet (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerPacket *packet);
G_GNUC_INTERNAL MpegTSPacketizerPacketReturn
mpegts_packetizer_process_next_packet(MpegTSPacketizer2 * packetizer);
G_GNUC_INTERNAL void mpegts_packetizer_clear_packet (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerPacket *packet);
G_GNUC_INTERNAL void mpegts_packetizer_remove_stream(MpegTSPacketizer2 *packetizer,
gint16 pid);
G_GNUC_INTERNAL GstMpegTsSection *mpegts_packetizer_push_section (MpegTSPacketizer2 *packetzer,
MpegTSPacketizerPacket *packet, GList **remaining);
/* Only valid if calculate_offset is TRUE */
G_GNUC_INTERNAL guint mpegts_packetizer_get_seen_pcr (MpegTSPacketizer2 *packetizer);
G_GNUC_INTERNAL GstClockTime
mpegts_packetizer_offset_to_ts (MpegTSPacketizer2 * packetizer,
guint64 offset, guint16 pcr_pid);
G_GNUC_INTERNAL guint64
mpegts_packetizer_ts_to_offset (MpegTSPacketizer2 * packetizer,
GstClockTime ts, guint16 pcr_pid);
G_GNUC_INTERNAL GstClockTime
mpegts_packetizer_pts_to_ts (MpegTSPacketizer2 * packetizer,
GstClockTime pts, guint16 pcr_pid);
G_GNUC_INTERNAL void
mpegts_packetizer_set_reference_offset (MpegTSPacketizer2 * packetizer,
guint64 refoffset);
G_END_DECLS
#endif /* GST_MPEGTS_PACKETIZER_H */
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