1 /* 2 * dvb_demux.h: DVB kernel demux API 3 * 4 * Copyright (C) 2000-2001 Marcus Metzler & Ralph Metzler 5 * for convergence integrated media GmbH 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public License 9 * as published by the Free Software Foundation; either version 2.1 10 * of the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 20 * 21 */ 22 23 #ifndef _DVB_DEMUX_H_ 24 #define _DVB_DEMUX_H_ 25 26 #include <linux/time.h> 27 #include <linux/timer.h> 28 #include <linux/spinlock.h> 29 #include <linux/mutex.h> 30 31 #include "demux.h" 32 33 #define DMX_TYPE_TS 0 34 #define DMX_TYPE_SEC 1 35 #define DMX_TYPE_PES 2 36 37 #define DMX_STATE_FREE 0 38 #define DMX_STATE_ALLOCATED 1 39 #define DMX_STATE_SET 2 40 #define DMX_STATE_READY 3 41 #define DMX_STATE_GO 4 42 43 #define DVB_DEMUX_MASK_MAX 18 44 45 #define MAX_PID 0x1fff 46 47 #define SPEED_PKTS_INTERVAL 50000 48 49 struct dvb_demux_filter { 50 struct dmx_section_filter filter; 51 u8 maskandmode[DMX_MAX_FILTER_SIZE]; 52 u8 maskandnotmode[DMX_MAX_FILTER_SIZE]; 53 int doneq; 54 55 struct dvb_demux_filter *next; 56 struct dvb_demux_feed *feed; 57 int index; 58 int state; 59 int type; 60 61 u16 hw_handle; 62 struct timer_list timer; 63 }; 64 65 #define DMX_FEED_ENTRY(pos) list_entry(pos, struct dvb_demux_feed, list_head) 66 67 struct dvb_demux_feed { 68 union { 69 struct dmx_ts_feed ts; 70 struct dmx_section_feed sec; 71 } feed; 72 73 union { 74 dmx_ts_cb ts; 75 dmx_section_cb sec; 76 } cb; 77 78 struct dvb_demux *demux; 79 void *priv; 80 int type; 81 int state; 82 u16 pid; 83 u8 *buffer; 84 int buffer_size; 85 86 struct timespec timeout; 87 struct dvb_demux_filter *filter; 88 89 int ts_type; 90 enum dmx_ts_pes pes_type; 91 92 int cc; 93 int pusi_seen; /* prevents feeding of garbage from previous section */ 94 95 u16 peslen; 96 97 struct list_head list_head; 98 unsigned int index; /* a unique index for each feed (can be used as hardware pid filter index) */ 99 }; 100 101 struct dvb_demux { 102 struct dmx_demux dmx; 103 void *priv; 104 int filternum; 105 int feednum; 106 int (*start_feed)(struct dvb_demux_feed *feed); 107 int (*stop_feed)(struct dvb_demux_feed *feed); 108 int (*write_to_decoder)(struct dvb_demux_feed *feed, 109 const u8 *buf, size_t len); 110 u32 (*check_crc32)(struct dvb_demux_feed *feed, 111 const u8 *buf, size_t len); 112 void (*memcopy)(struct dvb_demux_feed *feed, u8 *dst, 113 const u8 *src, size_t len); 114 115 int users; 116 #define MAX_DVB_DEMUX_USERS 10 117 struct dvb_demux_filter *filter; 118 struct dvb_demux_feed *feed; 119 120 struct list_head frontend_list; 121 122 struct dvb_demux_feed *pesfilter[DMX_TS_PES_OTHER]; 123 u16 pids[DMX_TS_PES_OTHER]; 124 int playing; 125 int recording; 126 127 #define DMX_MAX_PID 0x2000 128 struct list_head feed_list; 129 u8 tsbuf[204]; 130 int tsbufp; 131 132 struct mutex mutex; 133 spinlock_t lock; 134 135 uint8_t *cnt_storage; /* for TS continuity check */ 136 137 struct timespec speed_last_time; /* for TS speed check */ 138 uint32_t speed_pkts_cnt; /* for TS speed check */ 139 }; 140 141 int dvb_dmx_init(struct dvb_demux *dvbdemux); 142 void dvb_dmx_release(struct dvb_demux *dvbdemux); 143 void dvb_dmx_swfilter_packets(struct dvb_demux *dvbdmx, const u8 *buf, 144 size_t count); 145 void dvb_dmx_swfilter(struct dvb_demux *demux, const u8 *buf, size_t count); 146 void dvb_dmx_swfilter_204(struct dvb_demux *demux, const u8 *buf, 147 size_t count); 148 149 #endif /* _DVB_DEMUX_H_ */ 150