modules/demux/mpeg/ts_pid.h

   1 /*****************************************************************************
   2  * ts_pid.h: Transport Stream input module for VLC.
   3  *****************************************************************************
   4  * Copyright (C) 2004-2016 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *****************************************************************************/
  19 #ifndef VLC_TS_PID_H
  20 #define VLC_TS_PID_H
  21
  22 #include "ts_pid_fwd.h"
  23
  24 #define MIN_ES_PID 4    /* Should be 32.. broken muxers */
  25 #define MAX_ES_PID 8190
  26
  27 #include "ts_streams.h"
  28
  29 typedef struct demux_sys_t demux_sys_t;
  30
  31 typedef enum
  32 {
  33     TYPE_FREE = 0,
  34     TYPE_CAT,
  35     TYPE_PAT,
  36     TYPE_PMT,
  37     TYPE_STREAM,
  38     TYPE_SI,
  39     TYPE_PSIP,
  40 } ts_pid_type_t;
  41
  42 enum
  43 {
  44     FLAGS_NONE = 0,
  45     FLAG_SEEN  = 1,
  46     FLAG_SCRAMBLED = 2,
  47     FLAG_FILTERED = 4
  48 };
  49
  50 #define SEEN(x) ((x)->i_flags & FLAG_SEEN)
  51 #define SCRAMBLED(x) ((x).i_flags & FLAG_SCRAMBLED)
  52 #define PREVPKTKEEPBYTES 16
  53
  54 struct ts_pid_t
  55 {
  56     uint16_t    i_pid;
  57
  58     uint8_t     i_flags;
  59     uint8_t     i_cc;   /* countinuity counter */
  60     uint8_t     i_dup;  /* duplicate counter */
  61     uint8_t     type;
  62     uint8_t     prevpktbytes[PREVPKTKEEPBYTES];
  63
  64     uint16_t    i_refcount;
  65
  66     /* */
  67     union
  68     {
  69         ts_pat_t    *p_pat;
  70         ts_pmt_t    *p_pmt;
  71         ts_stream_t    *p_stream;
  72         ts_si_t     *p_si;
  73         ts_psip_t   *p_psip;
  74     } u;
  75
  76     struct
  77     {
  78         vlc_fourcc_t i_fourcc;
  79         vlc_fourcc_t i_original_fourcc;
  80         int i_cat;
  81         int i_dts_count;
  82         int i_pcr_count; /* carries PCR field */
  83         uint8_t i_stream_id;
  84     } probed;
  85
  86 };
  87
  88 struct ts_pid_list_t
  89 {
  90     ts_pid_t   pat;
  91     ts_pid_t   dummy;
  92     ts_pid_t   base_si;
  93     /* all non commons ones, dynamically allocated */
  94     ts_pid_t **pp_all;
  95     int        i_all;
  96     int        i_all_alloc;
  97     /* last recently used */
  98     uint16_t   i_last_pid;
  99     ts_pid_t  *p_last;
 100
 101 };
 102
 103 /* opacified pid list */
 104 void ts_pid_list_Init( ts_pid_list_t * );
 105 void ts_pid_list_Release( demux_t *, ts_pid_list_t * );
 106
 107 /* creates missing pid on the fly */
 108 ts_pid_t * ts_pid_Get( ts_pid_list_t *, uint16_t i_pid );
 109
 110 /* returns NULL on end. requires context */
 111 typedef struct
 112 {
 113     int i_pos;
 114 } ts_pid_next_context_t;
 115 #define ts_pid_NextContextInitValue { 0 }
 116 ts_pid_t * ts_pid_Next( ts_pid_list_t *, ts_pid_next_context_t * );
 117
 118 /* for legacy only: don't use and pass directly list reference */
 119 #define GetPID(p_sys, i_pid) ts_pid_Get((&(p_sys)->pids), i_pid)
 120
 121 int UpdateHWFilter( demux_sys_t *, ts_pid_t * );
 122 int SetPIDFilter( demux_sys_t *, ts_pid_t *, bool b_selected );
 123
 124 bool PIDSetup( demux_t *p_demux, ts_pid_type_t i_type, ts_pid_t *pid, ts_pid_t *p_parent );
 125 void PIDRelease( demux_t *p_demux, ts_pid_t *pid );
 126
 127
 128 #endif