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d0e8427b4e
We in fact get the size of the header (including stuffing bytes), therefore use that instead of trying to skip 0xff bytes ourselves since some media streams do start with 0xff (like mpeg audio's initial 0xfff).
113 lines
4 KiB
C
113 lines
4 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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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PESParsingResult mpegts_parse_pes_header (const guint8* data, gsize size,
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PESHeader *res, gint *offset);
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void init_pes_parser (void);
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G_END_DECLS
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#endif /* __PES_PARSE_H__ */
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