mpeg3demux.h

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/**********************************************************************
** Copyright (C) 2000 Trolltech AS.  All rights reserved.
**
** This file is part of Qtopia Environment.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#ifndef MPEG3DEMUX_H
#define MPEG3DEMUX_H

#include "mpeg3title.h"
#include <stdio.h>

typedef struct
{
        struct mpeg3_rec* file;
/* Data consisting of the multiplexed packet */
        unsigned char *raw_data;
        long raw_offset;
        int raw_size;
        long packet_size;
/* Only one is on depending on which track owns the demultiplexer. */
        int do_audio;
        int do_video;
/* Data consisting of the elementary stream */
        unsigned char *data_buffer;
        long data_size;
        long data_position;
        long data_allocated;
/* Remember when the file descriptor is at the beginning of the packet just read. */
        int reverse;
/* Set to 1 when eof or attempt to read before beginning */
        int error_flag;
/* Temp variables for returning */
        unsigned char next_char;
/* Correction factor for time discontinuity */
        double time_offset;
        int generating_timecode;

/* Titles */
        mpeg3_title_t *titles[MPEG3_MAX_STREAMS];
        int total_titles;
        int current_title;

/* Tables of every stream ID encountered */
        int astream_table[MPEG3_MAX_STREAMS];  /* macro of audio format if audio  */
        int vstream_table[MPEG3_MAX_STREAMS];  /* 1 if video */

/* Programs */
        int total_programs;
        int current_program;

/* Timecode in the current title */
        int current_timecode;

/* Byte position in the current title */
        long current_byte;

        int transport_error_indicator;
        int payload_unit_start_indicator;
        int pid;
        int transport_scrambling_control;
        int adaptation_field_control;
        int continuity_counter;
        int is_padding;
        int pid_table[MPEG3_PIDMAX];
        int continuity_counters[MPEG3_PIDMAX];
        int total_pids;
        int adaptation_fields;
        double time;           /* Time in seconds */
        int audio_pid;
        int video_pid;
        int astream;     /* Video stream ID being decoded.  -1 = select first ID in stream */
        int vstream;     /* Audio stream ID being decoded.  -1 = select first ID in stream */
        int aformat;      /* format of the audio derived from multiplexing codes */
        long program_association_tables;
        int table_id;
        int section_length;
        int transport_stream_id;
        long pes_packets;
        double pes_audio_time;  /* Presentation Time stamps */
        double pes_video_time;  /* Presentation Time stamps */
} mpeg3_demuxer_t;

/* ========================================================================= */
/*                             Entry points */
/* ========================================================================= */

#define mpeg3demux_error(demuxer) (((mpeg3_demuxer_t *)(demuxer))->error_flag)

#define mpeg3demux_time_offset(demuxer) (((mpeg3_demuxer_t *)(demuxer))->time_offset)

#define mpeg3demux_current_time(demuxer) (((mpeg3_demuxer_t *)(demuxer))->time + ((mpeg3_demuxer_t *)(demuxer))->time_offset)

#define mpeg3demux_read_char(demuxer) \
    ((((mpeg3_demuxer_t *)(demuxer))->data_position < ((mpeg3_demuxer_t *)(demuxer))->data_size) ? \
    ((mpeg3_demuxer_t *)(demuxer))->data_buffer[((mpeg3_demuxer_t *)(demuxer))->data_position++] : \
    mpeg3demux_read_char_packet(demuxer))

#define mpeg3demux_read_prev_char(demuxer) \
    ((((mpeg3_demuxer_t *)(demuxer))->data_position != 0) ? \
    ((mpeg3_demuxer_t *)(demuxer))->data_buffer[((mpeg3_demuxer_t *)(demuxer))->data_position--] : \
    mpeg3demux_read_prev_char_packet(demuxer))


#endif

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