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114 lines
4.1 KiB
C
114 lines
4.1 KiB
C
/*
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* pesparse.h : MPEG PES parsing utility
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* Copyright (C) 2011 Edward Hervey <bilboed@gmail.com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __PES_PARSE_H__
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#define __PES_PARSE_H__
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#include <gst/gst.h>
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#include "gstmpegdefs.h"
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G_BEGIN_DECLS
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typedef enum {
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PES_FLAG_PRIORITY = 1 << 3, /* PES_priority (present: high-priority) */
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PES_FLAG_DATA_ALIGNMENT = 1 << 2, /* data_alignment_indicator */
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PES_FLAG_COPYRIGHT = 1 << 1, /* copyright */
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PES_FLAG_ORIGINAL_OR_COPY = 1 << 0 /* original_or_copy */
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} PESHeaderFlags;
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typedef enum {
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PES_TRICK_MODE_FAST_FORWARD = 0x000,
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PES_TRICK_MODE_SLOW_MOTION = 0x001,
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PES_TRICK_MODE_FREEZE_FRAME = 0x010,
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PES_TRICK_MODE_FAST_REVERSE = 0x011,
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PES_TRICK_MODE_SLOW_REVERSE = 0x100,
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/* ... */
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PES_TRICK_MODE_INVALID = 0xfff /* Not present or invalid */
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} PESTrickModeControl;
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typedef enum {
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PES_FIELD_ID_TOP_ONLY = 0x00, /* Display from top field only */
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PES_FIELD_ID_BOTTOM_ONLY = 0x01, /* Display from bottom field only */
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PES_FIELD_ID_COMPLETE_FRAME = 0x10, /* Display complete frame */
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PES_FIELD_ID_INVALID = 0x11 /* Reserved/Invalid */
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} PESFieldID;
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typedef enum {
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PES_PARSING_OK = 0, /* Header fully parsed and valid */
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PES_PARSING_BAD = 1, /* Header invalid (CRC error for ex) */
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PES_PARSING_NEED_MORE = 2 /* Not enough data to parse header */
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} PESParsingResult;
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typedef struct {
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guint8 stream_id; /* See ID_* in gstmpegdefs.h */
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guint16 packet_length; /* The size of the PES header and PES data
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* (if 0 => unbounded packet) */
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guint16 header_size; /* The complete size of the PES header */
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/* All remaining entries in this structure are optional */
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guint8 scrambling_control; /* 0x00 : Not scrambled/unspecified,
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* The following are according to ETSI TS 101 154
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* 0x01 : reserved for future DVB use
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* 0x10 : PES packet scrambled with Even key
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* 0x11 : PES packet scrambled with Odd key
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*/
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PESHeaderFlags flags;
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guint64 PTS; /* PTS (-1 if not present or invalid) */
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guint64 DTS; /* DTS (-1 if not present or invalid) */
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guint64 ESCR; /* ESCR (-1 if not present or invalid) */
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guint32 ES_rate; /* in bytes/seconds (0 if not present or invalid) */
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PESTrickModeControl trick_mode;
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/* Only valid for _FAST_FORWARD, _FAST_REVERSE and _FREEZE_FRAME */
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PESFieldID field_id;
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/* Only valid for _FAST_FORWARD and _FAST_REVERSE */
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gboolean intra_slice_refresh;
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guint8 frequency_truncation;
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/* Only valid for _SLOW_FORWARD and _SLOW_REVERSE */
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guint8 rep_cntrl;
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guint8 additional_copy_info; /* Private data */
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guint16 previous_PES_packet_CRC;
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/* Extension fields */
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const guint8* private_data; /* PES_private_data, 16 bytes long */
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guint8 pack_header_size; /* Size of pack_header in bytes */
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const guint8* pack_header;
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gint8 program_packet_sequence_counter; /* -1 if not present or invalid */
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gboolean MPEG1_MPEG2_identifier;
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guint8 original_stuff_length;
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guint32 P_STD_buffer_size; /* P-STD buffer size in bytes (0 if invalid
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* or not present */
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gsize extension_field_length;
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guint8 stream_id_extension; /* Only valid if stream_id == ID_EXTENDED_STREAM_ID */
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const guint8* stream_id_extension_data;
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} PESHeader;
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G_GNUC_INTERNAL PESParsingResult mpegts_parse_pes_header (const guint8* data, gsize size,
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PESHeader *res, gint *offset);
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G_GNUC_INTERNAL void init_pes_parser (void);
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G_END_DECLS
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#endif /* __PES_PARSE_H__ */
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