Ts2Pes.h

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/*****************************************************************
|
|   MPEG2 Transport Stream - PES Packet
|
|   $Id: Ts2Pes.h 296 2014-06-25 11:20:09Z jebaseelir $
|   Original author:  Julien Boeuf
|
|   This software is provided to you pursuant to your agreement 
|   with Intertrust Technologies Corporation ("Intertrust"). 
|   This software may be used only in accordance with the terms 
|   of the agreement.
|      
|   Copyright (c) 2005-2014 by Intertrust. All rights reserved. 
|
****************************************************************/

#ifndef _TS2_PES_H_
#define _TS2_PES_H_

/*----------------------------------------------------------------------
|   includes
+---------------------------------------------------------------------*/
#include "Atomix.h"
#include "Ts2Packet.h"

/*----------------------------------------------------------------------
|   constants
+---------------------------------------------------------------------*/
#define TS2_PES_START_CODE_PREFIX   0x000001

#define TS2_PES_COMMON_HEADER_SIZE 3

#define TS2_PROGRAM_MAP_STREAM_ID       0xBC
#define TS2_PRIVATE_1_STREAM_ID         0xBD
#define TS2_PADDING_STREAM_ID           0xBE
#define TS2_PRIVATE_2_STREAM_ID         0xBF
#define TS2_ECM_STREAM_ID               0xF0
#define TS2_EMM_STREAM_ID               0xF1
#define TS2_DSMCC_STREAM_ID             0xF2
#define TS2_ISO_IEC_13522_STREAM_ID     0xF3
#define TS2_H222_1_TYPE_A_STREAM_ID     0xF4
#define TS2_H222_1_TYPE_B_STREAM_ID     0xF5
#define TS2_H222_1_TYPE_C_STREAM_ID     0xF6
#define TS2_H222_1_TYPE_D_STREAM_ID     0xF7
#define TS2_H222_1_TYPE_E_STREAM_ID     0xF8
#define TS2_PROGRAM_DIRECTORY_STREAM_ID 0xFF

/*----------------------------------------------------------------------
|   types
+---------------------------------------------------------------------*/
#define TS2_PES_HEADER_EXTENSION_PRIVATE_DATA_LENGTH    16
typedef struct {
    ATX_Byte    private_data[TS2_PES_HEADER_EXTENSION_PRIVATE_DATA_LENGTH];
    ATX_Byte    pack_field_length;
    ATX_Byte    program_packet_seq_count;
    ATX_Byte    mpeg1_2_id;
    ATX_Byte    original_stuff_length;
    ATX_Byte    pstd_buffer_scale;
    ATX_UInt16  pstd_buffer_size;
    ATX_UInt8   field_length;
} TS2_PesHeaderExtension;

typedef struct {
    ATX_UInt16              flags;
    ATX_UInt8               header_data_length;
    ATX_UInt64              pts;
    ATX_UInt64              dts;
    struct {
        ATX_UInt64 base;
        ATX_UInt16 extension;
    } escr;
    ATX_UInt32              es_rate;
    ATX_UInt8               trick_mode;
    ATX_UInt8               extra_copy_info;
    ATX_UInt16              previous_pes_crc;
    TS2_PesHeaderExtension* extension;
} TS2_PesPacketHeader;
  
typedef struct {
    ATX_UInt8               stream_id;
    ATX_Size                length;
    TS2_PesPacketHeader*    header;
    ATX_DataBuffer*         payload;
} TS2_PesPacket;

typedef struct {
    TS2_PesPacket* current;
    ATX_Size       pes_length_read; /* amount of data read so far. paired with TS2_PesPacket.length */
    ATX_Int8       last_continuity_counter;
} TS2_PesPacketAssembler;

/*----------------------------------------------------------------------
|   helpers
+---------------------------------------------------------------------*/
#define TS2_IsStreamIdVideo(stream_id) (((stream_id) & 0xE0) == 0xC0)
#define TS2_VideoStreamNumber(stream_id) ((stream_id) & 0x1F)
#define TS2_IsStreamIdAudio(stream_id) (((stream_id) & 0xF0) == 0xE0)
#define TS2_AudioStreamNumber(stream_id) ((stream_id) & 0x0F)

#define TS2_PesHeader_ScramblingControl(hflags)  (((hflags) & 0x3000) >> 12)
#define TS2_PesHeader_PriorityFlag(hflags)       (((hflags) & 0x0800) >> 11)
#define TS2_PesHeader_AlignmentIndicator(hflags) (((hflags) & 0x0400) >> 10)
#define TS2_PesHeader_Copyright(hflags)          (((hflags) & 0x0200) >>  9)
#define TS2_PesHeader_OriginalOrCopy(hflags)     (((hflags) & 0x0100) >>  8)
#define TS2_PesHeader_PtsDtsFlags(hflags)        (((hflags) & 0x00C0) >>  6)
#define TS2_PesHeader_EscrFlag(hflags)           (((hflags) & 0x0020) >>  5)
#define TS2_PesHeader_EsRateFlag(hflags)         (((hflags) & 0x0010) >>  4)
#define TS2_PesHeader_DsmTrickModeFlag(hflags)   (((hflags) & 0x0008) >>  3)
#define TS2_PesHeader_ExtraCopyInfoFlag(hflags)  (((hflags) & 0x0004) >>  2)
#define TS2_PesHeader_PesCrcFlag(hflags)         (((hflags) & 0x0002) >>  1)
#define TS2_PesHeader_ExtensionFlag(hflags)      (((hflags) & 0x0001)      )

#define TS2_PesExtension_PrivateData(eflags)     (((eflags) & 0x80)        )
#define TS2_PesExtension_PacketHeader(eflags)    (((eflags) & 0x40)        )
#define TS2_PesExtension_SequenceCounter(eflags) (((eflags) & 0x20)        )
#define TS2_PesExtension_StdBuffer(eflags)       (((eflags) & 0x10)        )
#define TS2_PesExtension_Flag2(eflags)           (((eflags) & 0x01)        )

/*----------------------------------------------------------------------
|   methods
+---------------------------------------------------------------------*/
#ifdef __cplusplus
extern "C" {
#endif

void TS2_PesPacket_Destroy(TS2_PesPacket* pp);

ATX_Result TS2_PesPacket_Unpack(TS2_PesPacketAssembler* assembler,
                                const TS2_Packet*       packet,
                                TS2_PesPacket**         packet_out);

#ifdef __cplusplus
}
#endif

#endif /* _TS2_PES_H_ */