mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-10 03:19:40 +00:00
113 lines
4.1 KiB
C
113 lines
4.1 KiB
C
/*
|
|
* pesparse.h : MPEG PES parsing utility
|
|
* Copyright (C) 2011 Edward Hervey <bilboed@gmail.com>
|
|
*
|
|
* 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 __PES_PARSE_H__
|
|
#define __PES_PARSE_H__
|
|
|
|
#include <gst/gst.h>
|
|
#include "gstmpegdefs.h"
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
typedef enum {
|
|
PES_FLAG_PRIORITY = 1 << 3, /* PES_priority (present: high-priority) */
|
|
PES_FLAG_DATA_ALIGNMENT = 1 << 2, /* data_alignment_indicator */
|
|
PES_FLAG_COPYRIGHT = 1 << 1, /* copyright */
|
|
PES_FLAG_ORIGINAL_OR_COPY = 1 << 0 /* original_or_copy */
|
|
} PESHeaderFlags;
|
|
|
|
typedef enum {
|
|
PES_TRICK_MODE_FAST_FORWARD = 0x000,
|
|
PES_TRICK_MODE_SLOW_MOTION = 0x001,
|
|
PES_TRICK_MODE_FREEZE_FRAME = 0x010,
|
|
PES_TRICK_MODE_FAST_REVERSE = 0x011,
|
|
PES_TRICK_MODE_SLOW_REVERSE = 0x100,
|
|
/* ... */
|
|
PES_TRICK_MODE_INVALID = 0xfff /* Not present or invalid */
|
|
} PESTrickModeControl;
|
|
|
|
typedef enum {
|
|
PES_FIELD_ID_TOP_ONLY = 0x00, /* Display from top field only */
|
|
PES_FIELD_ID_BOTTOM_ONLY = 0x01, /* Display from bottom field only */
|
|
PES_FIELD_ID_COMPLETE_FRAME = 0x10, /* Display complete frame */
|
|
PES_FIELD_ID_INVALID = 0x11 /* Reserved/Invalid */
|
|
} PESFieldID;
|
|
|
|
typedef enum {
|
|
PES_PARSING_OK = 0, /* Header fully parsed and valid */
|
|
PES_PARSING_BAD = 1, /* Header invalid (CRC error for ex) */
|
|
PES_PARSING_NEED_MORE = 2 /* Not enough data to parse header */
|
|
} PESParsingResult;
|
|
|
|
typedef struct {
|
|
guint8 stream_id; /* See ID_* in gstmpegdefs.h */
|
|
guint16 packet_length; /* The size of the PES header and PES data
|
|
* (if 0 => unbounded packet) */
|
|
guint16 header_size; /* The complete size of the PES header */
|
|
|
|
/* All remaining entries in this structure are optional */
|
|
guint8 scrambling_control; /* 0x00 : Not scrambled/unspecified,
|
|
* The following are according to ETSI TS 101 154
|
|
* 0x01 : reserved for future DVB use
|
|
* 0x10 : PES packet scrambled with Even key
|
|
* 0x11 : PES packet scrambled with Odd key
|
|
*/
|
|
PESHeaderFlags flags;
|
|
|
|
guint64 PTS; /* PTS (-1 if not present or invalid) */
|
|
guint64 DTS; /* DTS (-1 if not present or invalid) */
|
|
guint64 ESCR; /* ESCR (-1 if not present or invalid) */
|
|
|
|
guint32 ES_rate; /* in bytes/seconds (0 if not present or invalid) */
|
|
PESTrickModeControl trick_mode;
|
|
|
|
/* Only valid for _FAST_FORWARD, _FAST_REVERSE and _FREEZE_FRAME */
|
|
PESFieldID field_id;
|
|
/* Only valid for _FAST_FORWARD and _FAST_REVERSE */
|
|
gboolean intra_slice_refresh;
|
|
guint8 frequency_truncation;
|
|
/* Only valid for _SLOW_FORWARD and _SLOW_REVERSE */
|
|
guint8 rep_cntrl;
|
|
|
|
guint8 additional_copy_info; /* Private data */
|
|
guint16 previous_PES_packet_CRC;
|
|
|
|
/* Extension fields */
|
|
const guint8* private_data; /* PES_private_data, 16 bytes long */
|
|
guint8 pack_header_size; /* Size of pack_header in bytes */
|
|
const guint8* pack_header;
|
|
gint8 program_packet_sequence_counter; /* -1 if not present or invalid */
|
|
gboolean MPEG1_MPEG2_identifier;
|
|
guint8 original_stuff_length;
|
|
|
|
guint32 P_STD_buffer_size; /* P-STD buffer size in bytes (0 if invalid
|
|
* or not present */
|
|
|
|
gsize extension_field_length;
|
|
guint8 stream_id_extension; /* Only valid if stream_id == ID_EXTENDED_STREAM_ID */
|
|
const guint8* stream_id_extension_data;
|
|
} PESHeader;
|
|
|
|
G_GNUC_INTERNAL PESParsingResult mpegts_parse_pes_header (const guint8* data, gsize size,
|
|
PESHeader *res, gint *offset);
|
|
G_GNUC_INTERNAL void init_pes_parser (void);
|
|
|
|
G_END_DECLS
|
|
#endif /* __PES_PARSE_H__ */
|