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201 lines
7.9 KiB
C
201 lines
7.9 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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/*
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* PES stream_id assignments:
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*
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* 1011 1100 program_stream_map
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* 1011 1101 private_stream_1
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* 1011 1110 padding_stream
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* 1011 1111 private_stream_2
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* 110x xxxx ISO/IEC 13818-3 or ISO/IEC 11172-3 audio stream number x xxxx
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* 1110 xxxx ITU-T Rec. H.262 | ISO/IEC 13818-2 or ISO/IEC 11172-2 video stream number xxxx
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* 1111 0000 ECM_stream
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* 1111 0001 EMM_stream
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* 1111 0010 ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Annex A or ISO/IEC 13818-6_DSMCC_stream
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* 1111 0011 ISO/IEC_13522_stream
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* 1111 0100 ITU-T Rec. H.222.1 type A
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* 1111 0101 ITU-T Rec. H.222.1 type B
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* 1111 0110 ITU-T Rec. H.222.1 type C
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* 1111 0111 ITU-T Rec. H.222.1 type D
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* 1111 1000 ITU-T Rec. H.222.1 type E
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* 1111 1001 ancillary_stream
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* 1111 1010 ISO/IEC 14496-1_SL-packetized_stream
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* 1111 1011 ISO/IEC 14496-1_FlexMux_stream
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* 1111 1100 metadata stream
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* 1111 1101 extended_stream_id
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* 1111 1110 reserved data stream
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* 1111 1111 program_stream_directory
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*/
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#define ID_PS_END_CODE 0xB9
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#define ID_PS_PACK_START_CODE 0xBA
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#define ID_PS_SYSTEM_HEADER_START_CODE 0xBB
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#define ID_PS_PROGRAM_STREAM_MAP 0xBC
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#define ID_PRIVATE_STREAM_1 0xBD
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#define ID_PADDING_STREAM 0xBE
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#define ID_PRIVATE_STREAM_2 0xBF
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#define ID_ISO_IEC_MPEG12_AUDIO_STREAM_0 0xC0
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#define ID_ISO_IEC_MPEG12_AUDIO_STREAM_32 0xDF
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#define ID_ISO_IEC_MPEG12_VIDEO_STREAM_0 0xE0
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#define ID_ISO_IEC_MPEG12_VIDEO_STREAM_16 0xEF
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#define ID_ECM_STREAM 0xF0
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#define ID_EMM_STREAM 0xF1
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#define ID_DSMCC_STREAM 0xF2
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#define ID_ISO_IEC_13522_STREAM 0xF3
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#define ID_ITU_TREC_H222_TYPE_A_STREAM 0xF4
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#define ID_ITU_TREC_H222_TYPE_B_STREAM 0xF5
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#define ID_ITU_TREC_H222_TYPE_C_STREAM 0xF6
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#define ID_ITU_TREC_H222_TYPE_D_STREAM 0xF7
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#define ID_ITU_TREC_H222_TYPE_E_STREAM 0xF8
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#define ID_ANCILLARY_STREAM 0xF9
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#define ID_14496_1_SL_PACKETIZED_STREAM 0xFA
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#define ID_14496_1_SL_FLEXMUX_STREAM 0xFB
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#define ID_METADATA_STREAM 0xFC
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#define ID_EXTENDED_STREAM_ID 0xFD
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#define ID_RESERVED_STREAM_3 0xFE
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#define ID_PROGRAM_STREAM_DIRECTORY 0xFF
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/*
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* PES stream_id_extension assignments (if stream_id == ID_EXTENDED_STREAM_ID)
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*
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* 000 0000 IPMP Control Information stream
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* 000 0001 IPMP Stream
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* 000 0010 - 001 0001 ISO/IEC 14496-17 text Streams
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* 001 0010 - 010 0001 ISO/IEC 23002-3 auxiliary video data Streams
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* ... .... - 011 1111 Reserved
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*
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* PRIVATE STREAM RANGES (But known as used)
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* 101 0101 - 101 1111 VC-1
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* 110 0000 - 110 1111 Dirac (VC-1)
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*
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* 111 0001 AC3 or independent sub-stream 0 of EAC3/DD+
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* DTS or core sub-stream
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* 111 0010 dependent sub-stream of EAC3/DD+
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* DTS extension sub-stream
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* Secondary EAC3/DD+
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* Secondary DTS-HD LBR
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* 111 0110 AC3 in MLP/TrueHD
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* 1xx xxxx private_stream
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*/
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#define EXT_ID_IPMP_CONTORL_INFORMATION_STREAM 0x00
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#define EXT_ID_IPMP_STREAM 0x01
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/* VC-1 */
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#define EXT_ID_VC1_FIRST 0x55
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#define EXT_ID_VC1_LAST 0x5F
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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_* above */
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guint32 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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guint8 stream_id_extension; /* Public range (0x00 - 0x3f) only valid if stream_id == ID_EXTENDED_STREAM_ID
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* Private range (0x40 - 0xff) can be present in any stream type */
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gsize extension_field_length; /* Length of remaining extension field data */
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const guint8* stream_id_extension_data; /* Valid if extension_field_length != 0 */
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} PESHeader;
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G_GNUC_INTERNAL PESParsingResult mpegts_parse_pes_header (const guint8* data,
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gsize size,
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PESHeader *res);
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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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