/*
* dvb_demux.c - DVB kernel demux API
*
* Copyright (C) 2000-2001 Ralph Metzler <ralph@convergence.de>
* & Marcus Metzler <marcus@convergence.de>
* for convergence integrated media GmbH
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include <linux/vmalloc.h>
#include <linux/module.h>
#include <linux/poll.h>
#include <asm/uaccess.h>
#include "dvb_demux.h"
#ifdef MODULE
MODULE_DESCRIPTION("");
MODULE_AUTHOR("Ralph Metzler, Marcus Metzler");
#ifdef MODULE_LICENSE
MODULE_LICENSE("GPL");
#endif
#endif
#define NOBUFS
LIST_HEAD(dmx_muxs);
int dmx_register_demux(dmx_demux_t *demux)
{
struct list_head *pos, *head=&dmx_muxs;
if (!(demux->id && demux->vendor && demux->model))
return -EINVAL;
list_for_each(pos, head)
{
if (!strcmp(DMX_DIR_ENTRY(pos)->id, demux->id))
return -EEXIST;
}
demux->users=0;
list_add(&(demux->reg_list), head);
MOD_INC_USE_COUNT;
return 0;
}
int dmx_unregister_demux(dmx_demux_t* demux)
{
struct list_head *pos, *head=&dmx_muxs;
list_for_each(pos, head)
{
if (DMX_DIR_ENTRY(pos)==demux)
{
if (demux->users>0)
return -EINVAL;
list_del(pos);
MOD_DEC_USE_COUNT;
return 0;
}
}
return -ENODEV;
}
struct list_head *dmx_get_demuxes(void)
{
if (list_empty(&dmx_muxs))
return NULL;
return &dmx_muxs;
}
/******************************************************************************
* static inlined helper functions
******************************************************************************/
static inline u16
section_length(const u8 *buf)
{
return 3+((buf[1]&0x0f)<<8)+buf[2];
}
static inline u16
ts_pid(const u8 *buf)
{
return ((buf[1]&0x1f)<<8)+buf[2];
}
static inline int
payload(const u8 *tsp)
{
if (!(tsp[3]&0x10)) // no payload?
return 0;
if (tsp[3]&0x20) { // adaptation field?
if (tsp[4]>183) // corrupted data?
return 0;
else
return 184-1-tsp[4];
}
return 184;
}
static u32
dvb_crc_table[256] = {
0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4};
u32 dvb_crc32(u8 *data, int len)
{
int i;
u32 crc = 0xffffffff;
for (i=0; i<len; i++)
crc = (crc << 8) ^ dvb_crc_table[((crc >> 24) ^ *data++) & 0xff];
return crc;
}
void dvb_set_crc32(u8 *data, int length)
{
u32 crc;
crc=dvb_crc32(data,length);
data[length] = (crc>>24)&0xff;
data[length+1] = (crc>>16)&0xff;
data[length+2] = (crc>>8)&0xff;
data[length+3] = (crc)&0xff;
}
/******************************************************************************
* Software filter functions
******************************************************************************/
static inline int
DvbDmxSWFilterPayload(dvb_demux_feed_t *dvbdmxfeed, const u8 *buf)
{
int p, count;
//int ccok;
//u8 cc;
if (!(count=payload(buf)))
return -1;
p=188-count;
/*
cc=buf[3]&0x0f;
ccok=((dvbdmxfeed->cc+1)&0x0f)==cc ? 1 : 0;
dvbdmxfeed->cc=cc;
if (!ccok)
printk("missed packet!\n");
*/
if (buf[1]&0x40) // PUSI ?
dvbdmxfeed->peslen=0xfffa;
dvbdmxfeed->peslen+=count;
return dvbdmxfeed->cb.ts((u8 *)&buf[p], count, 0, 0,
&dvbdmxfeed->feed.ts, DMX_OK);
}
static int
DvbDmxSWFilterSectionFilter(dvb_demux_feed_t *dvbdmxfeed,
dvb_demux_filter_t *dvbdmxfilter)
{
dmx_section_filter_t *filter=&dvbdmxfilter->filter;
#if 1
int i;
for (i=0; i<DVB_DEMUX_MASK_MAX; i++)
if (filter->filter_mask[i]&
(filter->filter_value[i]^dvbdmxfeed->secbuf[i]))
return 0;
#else
u32 res;
u32 *val=(u32 *)(filter->filter_value);
u32 *mask=(u32 *)(filter->filter_mask);
u32 *data=(u32 *)(dvbdmxfeed->secbuf);
res=mask[0]&(val[0]^data[0]);
if (res) return 0;
res=mask[1]&(val[1]^data[1]);
if (res) return 0;
res=mask[2]&(val[2]^data[2]);
if (res) return 0;
res=mask[3]&(val[3]^data[3]);
if (res) return 0;
res=*(u16 *)(4+mask) & (*(u16 *)(4+val) ^ *(u16 *)(4+data));
if (res) return 0;
#endif
return dvbdmxfeed->cb.sec(dvbdmxfeed->secbuf, dvbdmxfeed->seclen,
0, 0, filter, DMX_OK);
}
static inline int
DvbDmxSWFilterSectionFeed(dvb_demux_feed_t *dvbdmxfeed)
{
u8 *buf=dvbdmxfeed->secbuf;
dvb_demux_filter_t *f;
if (dvbdmxfeed->secbufp!=dvbdmxfeed->seclen)
return -1;
if (!dvbdmxfeed->feed.sec.is_filtering)
return 0;
if (!(f=dvbdmxfeed->filter))
return 0;
do
if (DvbDmxSWFilterSectionFilter(dvbdmxfeed, f)<0)
return -1;
while ((f=f->next) && dvbdmxfeed->feed.sec.is_filtering);
dvbdmxfeed->secbufp=dvbdmxfeed->seclen=0;
memset(buf, 0, DVB_DEMUX_MASK_MAX);
return 0;
}
static inline int
DvbDmxSWFilterSectionPacket(dvb_demux_feed_t *dvbdmxfeed, const u8 *buf)
{
int p, count;
int ccok, rest;
u8 cc;
if (!(count=payload(buf)))
return -1;
p=188-count;
cc=buf[3]&0x0f;
ccok=((dvbdmxfeed->cc+1)&0x0f)==cc ? 1 : 0;
dvbdmxfeed->cc=cc;
if (buf[1]&0x40) { // PUSI set
// offset to start of first section is in buf[p]
if (p+buf[p]>187) // trash if it points beyond packet
return -1;
if (buf[p] && ccok) { // rest of previous section?
// did we have enough data in last packet to calc length?
if (dvbdmxfeed->secbufp && dvbdmxfeed->secbufp<3) {
memcpy(dvbdmxfeed->secbuf+dvbdmxfeed->secbufp,
buf+p+1,
3-dvbdmxfeed->secbufp);
dvbdmxfeed->seclen=section_length(dvbdmxfeed->secbuf);
if (dvbdmxfeed->seclen>4096)
return -1;
}
rest=dvbdmxfeed->seclen-dvbdmxfeed->secbufp;
if (rest==buf[p] && dvbdmxfeed->seclen) {
memcpy(dvbdmxfeed->secbuf+dvbdmxfeed->secbufp,
buf+p+1, buf[p]);
dvbdmxfeed->secbufp+=buf[p];
DvbDmxSWFilterSectionFeed(dvbdmxfeed);
}
}
p+=buf[p]+1; // skip rest of last section
count=188-p;
while (count>0) {
if ((count>2) && // enough data to determine sec length?
((dvbdmxfeed->seclen=section_length(buf+p))<=count)) {
if (dvbdmxfeed->seclen>4096)
return -1;
memcpy(dvbdmxfeed->secbuf, buf+p,
dvbdmxfeed->seclen);
dvbdmxfeed->secbufp=dvbdmxfeed->seclen;
p+=dvbdmxfeed->seclen;
count=188-p;
DvbDmxSWFilterSectionFeed(dvbdmxfeed);
// filling bytes until packet end?
if (count && buf[p]==0xff)
count=0;
} else { // section continues to following TS packet
memcpy(dvbdmxfeed->secbuf, buf+p, count);
dvbdmxfeed->secbufp+=count;
count=0;
}
}
} else { // section continued below
if (!ccok)
return -1;
if (!dvbdmxfeed->secbufp) // any data in last ts packet?
return -1;
// did we have enough data in last packet to calc section length?
if (dvbdmxfeed->secbufp<3) {
memcpy(dvbdmxfeed->secbuf+dvbdmxfeed->secbufp, buf+p,
3-dvbdmxfeed->secbufp);
dvbdmxfeed->seclen=section_length(dvbdmxfeed->secbuf);
if (dvbdmxfeed->seclen>4096)
return -1;
}
rest=dvbdmxfeed->seclen-dvbdmxfeed->secbufp;
if (rest<0)
return -1;
if (rest<=count) { // section completed in this TS packet
memcpy(dvbdmxfeed->secbuf+dvbdmxfeed->secbufp, buf+p, rest);
dvbdmxfeed->secbufp+=rest;
DvbDmxSWFilterSectionFeed(dvbdmxfeed);
} else { // section continues in following ts block
memcpy(dvbdmxfeed->secbuf+dvbdmxfeed->secbufp, buf+p, count);
dvbdmxfeed->secbufp+=count;
}
}
return 0;
}
static inline void
DvbDmxSWFilterPacketType(dvb_demux_feed_t *dvbdmxfeed, const u8 *buf)
{
switch(dvbdmxfeed->type) {
case DMX_TYPE_TS:
if (!dvbdmxfeed->feed.ts.is_filtering)
break;
if (dvbdmxfeed->ts_type & TS_PACKET) {
if (dvbdmxfeed->ts_type & TS_PAYLOAD_ONLY)
DvbDmxSWFilterPayload(dvbdmxfeed, buf);
else
dvbdmxfeed->cb.ts((u8 *)buf, 188, 0, 0,
&dvbdmxfeed->feed.ts, DMX_OK);
}
if (dvbdmxfeed->ts_type & TS_DECODER)
if (dvbdmxfeed->demux->write_to_decoder)
dvbdmxfeed->demux->
write_to_decoder(dvbdmxfeed, (u8 *)buf, 188);
break;
case DMX_TYPE_SEC:
if (!dvbdmxfeed->feed.sec.is_filtering)
break;
if (DvbDmxSWFilterSectionPacket(dvbdmxfeed, buf)<0)
dvbdmxfeed->seclen=dvbdmxfeed->secbufp=0;
break;
default:
break;
}
}
void inline
DvbDmxSWFilterPacket(dvb_demux_t *dvbdmx, const u8 *buf)
{
dvb_demux_feed_t *dvbdmxfeed;
if (!(dvbdmxfeed=dvbdmx->pid2feed[ts_pid(buf)]))
return;
DvbDmxSWFilterPacketType(dvbdmxfeed, buf);
}
void
DvbDmxSWFilterPackets(dvb_demux_t *dvbdmx, const u8 *buf, int count)
{
dvb_demux_feed_t *dvbdmxfeed;
if ((dvbdmxfeed=dvbdmx->pid2feed[0x2000]))
dvbdmxfeed->cb.ts((u8 *)buf, count*188, 0, 0,
&dvbdmxfeed->feed.ts, DMX_OK);
while (count) {
DvbDmxSWFilterPacket(dvbdmx, buf);
count--;
buf+=188;
}
}
static inline void
DvbDmxSWFilter(dvb_demux_t *dvbdmx, const u8 *buf, size_t count)
{
int p=0,i, j;
if ((i=dvbdmx->tsbufp)) {
if (count<(j=188-i)) {
memcpy(&dvbdmx->tsbuf[i], buf, count);
dvbdmx->tsbufp+=count;
return;
}
memcpy(&dvbdmx->tsbuf[i], buf, j);
DvbDmxSWFilterPacket(dvbdmx, dvbdmx->tsbuf);
dvbdmx->tsbufp=0;
p+=j;
}
while (p<count) {
if (buf[p]==0x47) {
if (count-p>=188) {
DvbDmxSWFilterPacket(dvbdmx, buf+p);
p+=188;
} else {
i=count-p;
memcpy(dvbdmx->tsbuf, buf+p, i);
dvbdmx->tsbufp=i;
return;
}
} else
p++;
}
}
/******************************************************************************
******************************************************************************
* DVB DEMUX API LEVEL FUNCTIONS
******************************************************************************
******************************************************************************/
static dvb_demux_filter_t *
DvbDmxFilterAlloc(dvb_demux_t *dvbdmx)
{
int i;
for (i=0; i<dvbdmx->filternum; i++)
if (dvbdmx->filter[i].state==DMX_STATE_FREE)
break;
if (i==dvbdmx->filternum)
return 0;
dvbdmx->filter[i].state=DMX_STATE_ALLOCATED;
return &dvbdmx->filter[i];
}
static dvb_demux_feed_t *
DvbDmxFeedAlloc(dvb_demux_t *dvbdmx)
{
int i;
for (i=0; i<dvbdmx->feednum; i++)
if (dvbdmx->feed[i].state==DMX_STATE_FREE)
break;
if (i==dvbdmx->feednum)
return 0;
dvbdmx->feed[i].state=DMX_STATE_ALLOCATED;
return &dvbdmx->feed[i];
}
/******************************************************************************
* dmx_ts_feed API calls
******************************************************************************/
static int
dmx_ts_feed_set_type(dmx_ts_feed_t *feed, int type, dmx_ts_pes_t pes_type)
{
dvb_demux_feed_t *dvbdmxfeed=(dvb_demux_feed_t *) feed;
dvb_demux_t *dvbdmx=dvbdmxfeed->demux;
down(&dvbdmx->mutex);
dvbdmxfeed->ts_type=type;
dvbdmxfeed->pes_type=pes_type;
if (dvbdmxfeed->ts_type & TS_DECODER) {
if (pes_type >= DMX_TS_PES_OTHER) {
up(&dvbdmx->mutex);
return -EINVAL;
}
if (dvbdmx->pesfilter[pes_type] &&
(dvbdmx->pesfilter[pes_type]!=dvbdmxfeed)) {
up(&dvbdmx->mutex);
return -EINVAL;
}
dvbdmx->pesfilter[pes_type]=dvbdmxfeed;
dvbdmx->pids[pes_type]=dvbdmxfeed->pid;
}
up(&dvbdmx->mutex);
return 0;
}
static int
dmx_pid_set(u16 pid, dvb_demux_feed_t *dvbdmxfeed)
{
dvb_demux_t *dvbdmx=dvbdmxfeed->demux;
dvb_demux_feed_t **pid2feed=dvbdmx->pid2feed;
if (pid>DMX_MAX_PID)
return -EINVAL;
if (dvbdmxfeed->pid!=0xffff) {
if (dvbdmxfeed->pid<=DMX_MAX_PID)
pid2feed[dvbdmxfeed->pid]=0;
dvbdmxfeed->pid=0xffff;
}
if (pid2feed[pid]) {
return -EBUSY;
}
pid2feed[pid]=dvbdmxfeed;
dvbdmxfeed->pid=pid;
return 0;
}
static int
dmx_ts_feed_set(struct dmx_ts_feed_s* feed,
u16 pid,
size_t callback_length,
size_t circular_buffer_size,
int descramble,
struct timespec timeout
)
{
dvb_demux_feed_t *dvbdmxfeed=(dvb_demux_feed_t *) feed;
dvb_demux_t *dvbdmx=dvbdmxfeed->demux;
int ret;
down(&dvbdmx->mutex);
ret=dmx_pid_set(pid, dvbdmxfeed);
if (ret<0) {
up(&dvbdmx->mutex);
return ret;
}
dvbdmxfeed->buffer_size=circular_buffer_size;
dvbdmxfeed->descramble=descramble;
dvbdmxfeed->timeout=timeout;
dvbdmxfeed->cb_length=callback_length;
dvbdmxfeed->ts_type=TS_PACKET;
if (dvbdmxfeed->descramble) {
up(&dvbdmx->mutex);
return -ENOSYS;
}
if (dvbdmxfeed->buffer_size) {
#ifdef NOBUFS
dvbdmxfeed->buffer=0;
#else
dvbdmxfeed->buffer=vmalloc(dvbdmxfeed->buffer_size);
if (!dvbdmxfeed->buffer) {
up(&dvbdmx->mutex);
return -ENOMEM;
}
#endif
}
dvbdmxfeed->state=DMX_STATE_READY;
up(&dvbdmx->mutex);
return 0;
}
static int
dmx_ts_feed_start_filtering(struct dmx_ts_feed_s* feed)
{
dvb_demux_feed_t *dvbdmxfeed=(dvb_demux_feed_t *) feed;
dvb_demux_t *dvbdmx=dvbdmxfeed->demux;
int ret;
down(&dvbdmx->mutex);
if (dvbdmxfeed->state!=DMX_STATE_READY ||
dvbdmxfeed->type!=DMX_TYPE_TS) {
up(&dvbdmx->mutex);
return -EINVAL;
}
if (!dvbdmx->start_feed) {
up(&dvbdmx->mutex);
return -1;
}
ret=dvbdmx->start_feed(dvbdmxfeed);
if (ret<0) {
up(&dvbdmx->mutex);
return ret;
}
feed->is_filtering=1;
dvbdmxfeed->state=DMX_STATE_GO;
up(&dvbdmx->mutex);
return 0;
}
static int
dmx_ts_feed_stop_filtering(struct dmx_ts_feed_s* feed)
{
dvb_demux_feed_t *dvbdmxfeed=(dvb_demux_feed_t *) feed;
dvb_demux_t *dvbdmx=dvbdmxfeed->demux;
int ret;
down(&dvbdmx->mutex);
if (dvbdmxfeed->state<DMX_STATE_GO) {
up(&dvbdmx->mutex);
return -EINVAL;
}
if (!dvbdmx->stop_feed) {
up(&dvbdmx->mutex);
return -1;
}
ret=dvbdmx->stop_feed(dvbdmxfeed);
feed->is_filtering=0;
dvbdmxfeed->state=DMX_STATE_ALLOCATED;
up(&dvbdmx->mutex);
return ret;
}
static int dvbdmx_allocate_ts_feed(dmx_demux_t *demux,
dmx_ts_feed_t **feed,
dmx_ts_cb callback)
{
dvb_demux_t *dvbdmx=(dvb_demux_t *) demux;
dvb_demux_feed_t *dvbdmxfeed;
down(&dvbdmx->mutex);
if (!(dvbdmxfeed=DvbDmxFeedAlloc(dvbdmx))) {
up(&dvbdmx->mutex);
return -EBUSY;
}
dvbdmxfeed->type=DMX_TYPE_TS;
dvbdmxfeed->cb.ts=callback;
dvbdmxfeed->demux=dvbdmx;
dvbdmxfeed->pid=0xffff;
dvbdmxfeed->peslen=0xfffa;
dvbdmxfeed->buffer=0;
(*feed)=&dvbdmxfeed->feed.ts;
(*feed)->is_filtering=0;
(*feed)->parent=demux;
(*feed)->priv=0;
(*feed)->set=dmx_ts_feed_set;
(*feed)->set_type=dmx_ts_feed_set_type;
(*feed)->start_filtering=dmx_ts_feed_start_filtering;
(*feed)->stop_filtering=dmx_ts_feed_stop_filtering;
if (!(dvbdmxfeed->filter=DvbDmxFilterAlloc(dvbdmx))) {
dvbdmxfeed->state=DMX_STATE_FREE;
up(&dvbdmx->mutex);
return -EBUSY;
}
dvbdmxfeed->filter->type=DMX_TYPE_TS;
dvbdmxfeed->filter->feed=dvbdmxfeed;
dvbdmxfeed->filter->state=DMX_STATE_READY;
up(&dvbdmx->mutex);
return 0;
}
static int dvbdmx_release_ts_feed(dmx_demux_t *demux, dmx_ts_feed_t *feed)
{
dvb_demux_t *dvbdmx=(dvb_demux_t *) demux;
dvb_demux_feed_t *dvbdmxfeed=(dvb_demux_feed_t *) feed;
down(&dvbdmx->mutex);
if (dvbdmxfeed->state==DMX_STATE_FREE) {
up(&dvbdmx->mutex);
return -EINVAL;
}
#ifndef NOBUFS
if (dvbdmxfeed->buffer) {
vfree(dvbdmxfeed->buffer);
dvbdmxfeed->buffer=0;
}
#endif
dvbdmxfeed->state=DMX_STATE_FREE;
dvbdmxfeed->filter->state=DMX_STATE_FREE;
if (dvbdmxfeed->pid!=0xffff) {
if (dvbdmxfeed->pid<=DMX_MAX_PID)
dvbdmxfeed->demux->pid2feed[dvbdmxfeed->pid]=0;
dvbdmxfeed->pid=0xffff;
}
up(&dvbdmx->mutex);
return 0;
}
/******************************************************************************
* dmx_pes_feed API calls
******************************************************************************/
/*
static int
dmx_pes_feed_set(struct dmx_pes_feed_s* feed,
u16 pid,
size_t circular_buffer_size,
int descramble,
struct timespec timeout)
{
return 0;
}
static int
dmx_pes_feed_start_filtering(struct dmx_pes_feed_s* feed)
{
return 0;
}
static int
dmx_pes_feed_stop_filtering(struct dmx_pes_feed_s* feed)
{
return 0;
}
*/
static int dvbdmx_allocate_pes_feed(dmx_demux_t *demux,
dmx_pes_feed_t **feed,
dmx_pes_cb callback)
{
return 0;
}
static int dvbdmx_release_pes_feed(dmx_demux_t *demux,
dmx_pes_feed_t *feed)
{
return 0;
}
/******************************************************************************
* dmx_section_feed API calls
******************************************************************************/
static int
dmx_section_feed_allocate_filter(struct dmx_section_feed_s* feed,
dmx_section_filter_t** filter)
{
dvb_demux_feed_t *dvbdmxfeed=(dvb_demux_feed_t *) feed;
dvb_demux_t *dvbdemux=dvbdmxfeed->demux;
dvb_demux_filter_t *dvbdmxfilter;
down(&dvbdemux->mutex);
dvbdmxfilter=DvbDmxFilterAlloc(dvbdemux);
if (!dvbdmxfilter) {
up(&dvbdemux->mutex);
return -ENOSPC;
}
*filter=&dvbdmxfilter->filter;
(*filter)->parent=feed;
(*filter)->priv=0;
dvbdmxfilter->feed=dvbdmxfeed;
dvbdmxfilter->pid=dvbdmxfeed->pid;
dvbdmxfilter->type=DMX_TYPE_SEC;
dvbdmxfilter->state=DMX_STATE_READY;
dvbdmxfilter->next=dvbdmxfeed->filter;
dvbdmxfeed->filter=dvbdmxfilter;
up(&dvbdemux->mutex);
return 0;
}
static int
dmx_section_feed_set(struct dmx_section_feed_s* feed,
u16 pid, size_t circular_buffer_size,
int descramble, int check_crc)
{
dvb_demux_feed_t *dvbdmxfeed=(dvb_demux_feed_t *) feed;
dvb_demux_t *dvbdmx=dvbdmxfeed->demux;
if (pid>0x1fff)
return -EINVAL;
down(&dvbdmx->mutex);
if (dvbdmxfeed->pid!=0xffff) {
dvbdmx->pid2feed[dvbdmxfeed->pid]=0;
dvbdmxfeed->pid=0xffff;
}
if (dvbdmx->pid2feed[pid]) {
up(&dvbdmx->mutex);
return -EBUSY;
}
dvbdmx->pid2feed[pid]=dvbdmxfeed;
dvbdmxfeed->pid=pid;
dvbdmxfeed->buffer_size=circular_buffer_size;
dvbdmxfeed->descramble=descramble;
if (dvbdmxfeed->descramble) {
up(&dvbdmx->mutex);
return -ENOSYS;
}
dvbdmxfeed->check_crc=check_crc;
#ifdef NOBUFS
dvbdmxfeed->buffer=0;
#else
dvbdmxfeed->buffer=vmalloc(dvbdmxfeed->buffer_size);
if (!dvbdmxfeed->buffer) {
up(&dvbdmx->mutex);
return -ENOMEM;
}
#endif
dvbdmxfeed->state=DMX_STATE_READY;
up(&dvbdmx->mutex);
return 0;
}
static int
dmx_section_feed_start_filtering(dmx_section_feed_t *feed)
{
dvb_demux_feed_t *dvbdmxfeed=(dvb_demux_feed_t *) feed;
dvb_demux_t *dvbdmx=dvbdmxfeed->demux;
int ret;
down(&dvbdmx->mutex);
if (feed->is_filtering) {
up(&dvbdmx->mutex);
return -EBUSY;
}
if (!dvbdmxfeed->filter) {
up(&dvbdmx->mutex);
return -EINVAL;
}
dvbdmxfeed->secbufp=0;
dvbdmxfeed->seclen=0;
if (!dvbdmx->start_feed) {
up(&dvbdmx->mutex);
return -1;
}
ret=dvbdmx->start_feed(dvbdmxfeed);
if (ret<0) {
up(&dvbdmx->mutex);
return ret;
}
feed->is_filtering=1;
dvbdmxfeed->state=DMX_STATE_GO;
up(&dvbdmx->mutex);
return 0;
}
static int
dmx_section_feed_stop_filtering(struct dmx_section_feed_s* feed)
{
dvb_demux_feed_t *dvbdmxfeed=(dvb_demux_feed_t *) feed;
dvb_demux_t *dvbdmx=dvbdmxfeed->demux;
int ret;
down(&dvbdmx->mutex);
if (!dvbdmx->stop_feed) {
up(&dvbdmx->mutex);
return -1;
}
ret=dvbdmx->stop_feed(dvbdmxfeed);
dvbdmxfeed->state=DMX_STATE_READY;
feed->is_filtering=0;
up(&dvbdmx->mutex);
return ret;
}
static int
dmx_section_feed_release_filter(dmx_section_feed_t *feed,
dmx_section_filter_t* filter)
{
dvb_demux_filter_t *dvbdmxfilter=(dvb_demux_filter_t *) filter, *f;
dvb_demux_feed_t *dvbdmxfeed=(dvb_demux_feed_t *) feed;
dvb_demux_t *dvbdmx=dvbdmxfeed->demux;
down(&dvbdmx->mutex);
if (dvbdmxfilter->feed!=dvbdmxfeed) {
up(&dvbdmx->mutex);
return -EINVAL;
}
if (feed->is_filtering)
feed->stop_filtering(feed);
f=dvbdmxfeed->filter;
if (f==dvbdmxfilter)
dvbdmxfeed->filter=dvbdmxfilter->next;
else {
while(f->next!=dvbdmxfilter)
f=f->next;
f->next=f->next->next;
}
dvbdmxfilter->state=DMX_STATE_FREE;
up(&dvbdmx->mutex);
return 0;
}
static int dvbdmx_allocate_section_feed(dmx_demux_t *demux,
dmx_section_feed_t **feed,
dmx_section_cb callback)
{
dvb_demux_t *dvbdmx=(dvb_demux_t *) demux;
dvb_demux_feed_t *dvbdmxfeed;
down(&dvbdmx->mutex);
if (!(dvbdmxfeed=DvbDmxFeedAlloc(dvbdmx))) {
up(&dvbdmx->mutex);
return -EBUSY;
}
dvbdmxfeed->type=DMX_TYPE_SEC;
dvbdmxfeed->cb.sec=callback;
dvbdmxfeed->demux=dvbdmx;
dvbdmxfeed->pid=0xffff;
dvbdmxfeed->secbufp=0;
dvbdmxfeed->filter=0;
dvbdmxfeed->buffer=0;
(*feed)=&dvbdmxfeed->feed.sec;
(*feed)->is_filtering=0;
(*feed)->parent=demux;
(*feed)->priv=0;
(*feed)->set=dmx_section_feed_set;
(*feed)->allocate_filter=dmx_section_feed_allocate_filter;
(*feed)->release_filter=dmx_section_feed_release_filter;
(*feed)->start_filtering=dmx_section_feed_start_filtering;
(*feed)->stop_filtering=dmx_section_feed_stop_filtering;
up(&dvbdmx->mutex);
return 0;
}
static int dvbdmx_release_section_feed(dmx_demux_t *demux,
dmx_section_feed_t *feed)
{
dvb_demux_feed_t *dvbdmxfeed=(dvb_demux_feed_t *) feed;
dvb_demux_t *dvbdmx=(dvb_demux_t *) demux;
down(&dvbdmx->mutex);
if (dvbdmxfeed->state==DMX_STATE_FREE) {
up(&dvbdmx->mutex);
return -EINVAL;
}
#ifndef NOBUFS
if (dvbdmxfeed->buffer) {
vfree(dvbdmxfeed->buffer);
dvbdmxfeed->buffer=0;
}
#endif
dvbdmxfeed->state=DMX_STATE_FREE;
dvbdmxfeed->demux->pid2feed[dvbdmxfeed->pid]=0;
if (dvbdmxfeed->pid!=0xffff)
dvbdmxfeed->demux->pid2feed[dvbdmxfeed->pid]=0;
up(&dvbdmx->mutex);
return 0;
}
/******************************************************************************
* dvb_demux kernel data API calls
******************************************************************************/
static int dvbdmx_open(dmx_demux_t *demux)
{
dvb_demux_t *dvbdemux=(dvb_demux_t *) demux;
if (dvbdemux->users>=MAX_DVB_DEMUX_USERS)
return -EUSERS;
dvbdemux->users++;
return 0;
}
static int dvbdmx_close(struct dmx_demux_s *demux)
{
dvb_demux_t *dvbdemux=(dvb_demux_t *) demux;
if (dvbdemux->users==0)
return -ENODEV;
dvbdemux->users--;
//FIXME: release any unneeded resources if users==0
return 0;
}
static int dvbdmx_write(dmx_demux_t *demux, const char *buf, size_t count)
{
dvb_demux_t *dvbdemux=(dvb_demux_t *) demux;
if ((!demux->frontend) ||
(demux->frontend->source!=DMX_MEMORY_FE))
return -EINVAL;
down(&dvbdemux->mutex);
DvbDmxSWFilter(dvbdemux, buf, count);
up(&dvbdemux->mutex);
return count;
}
static int dvbdmx_add_frontend(dmx_demux_t *demux,
dmx_frontend_t *frontend)
{
dvb_demux_t *dvbdemux=(dvb_demux_t *) demux;
struct list_head *pos, *head=&dvbdemux->frontend_list;
//printk ("function : %s\n", __FUNCTION__);
if (!(frontend->id && frontend->vendor && frontend->model))
return -EINVAL;
list_for_each(pos, head)
{
if (!strcmp(DMX_FE_ENTRY(pos)->id, frontend->id))
return -EEXIST;
}
list_add(&(frontend->connectivity_list), head);
return 0;
}
static int
dvbdmx_remove_frontend(dmx_demux_t *demux,
dmx_frontend_t *frontend)
{
dvb_demux_t *dvbdemux=(dvb_demux_t *) demux;
struct list_head *pos, *head=&dvbdemux->frontend_list;
list_for_each(pos, head)
{
if (DMX_FE_ENTRY(pos)==frontend)
{
list_del(pos);
return 0;
}
}
return -ENODEV;
}
static struct list_head *
dvbdmx_get_frontends(dmx_demux_t *demux)
{
dvb_demux_t *dvbdemux=(dvb_demux_t *) demux;
if (list_empty(&dvbdemux->frontend_list))
return NULL;
return &dvbdemux->frontend_list;
}
static int dvbdmx_connect_frontend(dmx_demux_t *demux,
dmx_frontend_t *frontend)
{
dvb_demux_t *dvbdemux=(dvb_demux_t *) demux;
if (demux->frontend)
return -EINVAL;
down(&dvbdemux->mutex);
demux->frontend=frontend;
up(&dvbdemux->mutex);
return 0;
}
static int dvbdmx_disconnect_frontend(dmx_demux_t *demux)
{
dvb_demux_t *dvbdemux=(dvb_demux_t *) demux;
down(&dvbdemux->mutex);
demux->frontend=NULL;
up(&dvbdemux->mutex);
return 0;
}
static int dvbdmx_get_pes_pids(dmx_demux_t *demux, u16 *pids)
{
dvb_demux_t *dvbdemux=(dvb_demux_t *) demux;
memcpy(pids, dvbdemux->pids, 5*sizeof(u16));
return 0;
}
int
DvbDmxInit(dvb_demux_t *dvbdemux)
{
int i;
dmx_demux_t *dmx=&dvbdemux->dmx;
dvbdemux->users=0;
dvbdemux->filter=vmalloc(dvbdemux->filternum*sizeof(dvb_demux_filter_t));
if (!dvbdemux->filter)
return -ENOMEM;
dvbdemux->feed=vmalloc(dvbdemux->feednum*sizeof(dvb_demux_feed_t));
if (!dvbdemux->feed) {
vfree(dvbdemux->filter);
return -ENOMEM;
}
for (i=0; i<dvbdemux->filternum; i++) {
dvbdemux->filter[i].state=DMX_STATE_FREE;
dvbdemux->filter[i].index=i;
}
for (i=0; i<dvbdemux->feednum; i++)
dvbdemux->feed[i].state=DMX_STATE_FREE;
dvbdemux->frontend_list.next=
dvbdemux->frontend_list.prev=
&dvbdemux->frontend_list;
for (i=0; i<DMX_TS_PES_OTHER; i++) {
dvbdemux->pesfilter[i]=NULL;
dvbdemux->pids[i]=0xffff;
}
dvbdemux->playing=dvbdemux->recording=0;
memset(dvbdemux->pid2feed, 0, (DMX_MAX_PID+1)*sizeof(dvb_demux_feed_t *));
dvbdemux->tsbufp=0;
dmx->frontend=0;
dmx->reg_list.next=dmx->reg_list.prev=&dmx->reg_list;
dmx->priv=(void *) dvbdemux;
//dmx->users=0; // reset in dmx_register_demux()
dmx->open=dvbdmx_open;
dmx->close=dvbdmx_close;
dmx->write=dvbdmx_write;
dmx->allocate_ts_feed=dvbdmx_allocate_ts_feed;
dmx->release_ts_feed=dvbdmx_release_ts_feed;
dmx->allocate_pes_feed=dvbdmx_allocate_pes_feed;
dmx->release_pes_feed=dvbdmx_release_pes_feed;
dmx->allocate_section_feed=dvbdmx_allocate_section_feed;
dmx->release_section_feed=dvbdmx_release_section_feed;
dmx->descramble_mac_address=NULL;
dmx->descramble_section_payload=NULL;
dmx->add_frontend=dvbdmx_add_frontend;
dmx->remove_frontend=dvbdmx_remove_frontend;
dmx->get_frontends=dvbdmx_get_frontends;
dmx->connect_frontend=dvbdmx_connect_frontend;
dmx->disconnect_frontend=dvbdmx_disconnect_frontend;
dmx->get_pes_pids=dvbdmx_get_pes_pids;
sema_init(&dvbdemux->mutex, 1);
if (dmx_register_demux(dmx)<0)
return -1;
return 0;
}
int
DvbDmxRelease(dvb_demux_t *dvbdemux)
{
dmx_demux_t *dmx=&dvbdemux->dmx;
dmx_unregister_demux(dmx);
if (dvbdemux->filter)
vfree(dvbdemux->filter);
if (dvbdemux->feed)
vfree(dvbdemux->feed);
return 0;
}
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