/*
* dmxdev.c - DVB demultiplexer device
*
* Copyright (C) 2000 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 "dmxdev.h"
#ifdef MODULE
MODULE_DESCRIPTION("");
MODULE_AUTHOR("Ralph Metzler, Marcus Metzler");
#ifdef MODULE_LICENSE
MODULE_LICENSE("GPL");
#endif
MODULE_PARM(debug,"i");
#endif
static int debug = 0;
#define dprintk if (debug) printk
inline dmxdev_filter_t *
DmxDevFile2Filter(dmxdev_t *dmxdev, struct file *file)
{
return (dmxdev_filter_t *) file->private_data;
}
inline dmxdev_dvr_t *
DmxDevFile2DVR(dmxdev_t *dmxdev, struct file *file)
{
return (dmxdev_dvr_t *) file->private_data;
}
static inline void
DmxDevBufferInit(dmxdev_buffer_t *buffer)
{
buffer->data=0;
buffer->size=8192;
buffer->pread=0;
buffer->pwrite=0;
buffer->error=0;
init_waitqueue_head(&buffer->queue);
}
static inline int
DmxDevBufferWrite(dmxdev_buffer_t *buf, uint8_t *src, int len)
{
int split;
int free;
int todo;
if (!len)
return 0;
if (!buf->data)
return 0;
free=buf->pread-buf->pwrite;
split=0;
if (free<=0) {
free+=buf->size;
split=buf->size-buf->pwrite;
}
if (len>=free) {
dprintk("dmxdev: buffer overflow\n");
return -1;
}
if (split>=len)
split=0;
todo=len;
if (split) {
memcpy(buf->data + buf->pwrite, src, split);
todo-=split;
buf->pwrite=0;
}
memcpy(buf->data + buf->pwrite, src+split, todo);
buf->pwrite=(buf->pwrite+todo)%buf->size;
return len;
}
static ssize_t
DmxDevBufferRead(dmxdev_buffer_t *src, int non_blocking,
char *buf, size_t count, loff_t *ppos)
{
unsigned long todo=count;
int split, avail, error;
if (!src->data)
return 0;
if ((error=src->error)) {
src->error=0;
return error;
}
if (non_blocking && (src->pwrite==src->pread))
return -EWOULDBLOCK;
while (todo>0) {
if (non_blocking && (src->pwrite==src->pread))
return (count-todo) ? (count-todo) : -EWOULDBLOCK;
if (wait_event_interruptible(src->queue,
(src->pread!=src->pwrite) ||
(src->error))<0)
return count-todo;
if ((error=src->error)) {
src->error=0;
return error;
}
split=src->size;
avail=src->pwrite - src->pread;
if (avail<0) {
avail+=src->size;
split=src->size - src->pread;
}
if (avail>todo)
avail=todo;
if (split<avail) {
if (copy_to_user(buf, src->data+src->pread, split))
return -EFAULT;
buf+=split;
src->pread=0;
todo-=split;
avail-=split;
}
if (avail) {
if (copy_to_user(buf, src->data+src->pread, avail))
return -EFAULT;
src->pread = (src->pread + avail) % src->size;
todo-=avail;
buf+=avail;
}
}
return count;
}
static dmx_frontend_t *
get_fe(dmx_demux_t *demux, int type)
{
struct list_head *head, *pos;
head=demux->get_frontends(demux);
if (!head)
return 0;
list_for_each(pos, head)
if (DMX_FE_ENTRY(pos)->source==type)
return DMX_FE_ENTRY(pos);
return 0;
}
static inline void
DmxDevDVRStateSet(dmxdev_dvr_t *dmxdevdvr, int state)
{
spin_lock_irq(&dmxdevdvr->dev->lock);
dmxdevdvr->state=state;
spin_unlock_irq(&dmxdevdvr->dev->lock);
}
int
DmxDevDVROpen(dmxdev_t *dmxdev, struct file *file)
{
dmx_frontend_t *front;
down(&dmxdev->mutex);
if ((file->f_flags&O_ACCMODE)==O_RDWR) {
if (!(dmxdev->capabilities&DMXDEV_CAP_DUPLEX)) {
up(&dmxdev->mutex);
return -EOPNOTSUPP;
}
}
if ((file->f_flags&O_ACCMODE)==O_RDONLY) {
DmxDevBufferInit(&dmxdev->dvr_buffer);
dmxdev->dvr_buffer.size=DVR_BUFFER_SIZE;
dmxdev->dvr_buffer.data=vmalloc(DVR_BUFFER_SIZE);
if (!dmxdev->dvr_buffer.data) {
up(&dmxdev->mutex);
return -ENOMEM;
}
}
if ((file->f_flags&O_ACCMODE)==O_WRONLY) {
dmxdev->dvr_orig_fe=dmxdev->demux->frontend;
if (!dmxdev->demux->write) {
up(&dmxdev->mutex);
return -EOPNOTSUPP;
}
front=get_fe(dmxdev->demux, DMX_MEMORY_FE);
if (!front) {
up(&dmxdev->mutex);
return -EINVAL;
}
dmxdev->demux->disconnect_frontend(dmxdev->demux);
dmxdev->demux->connect_frontend(dmxdev->demux, front);
}
up(&dmxdev->mutex);
return 0;
}
int
DmxDevDVRClose(dmxdev_t *dmxdev, struct file *file)
{
down(&dmxdev->mutex);
if ((file->f_flags&O_ACCMODE)==O_WRONLY) {
dmxdev->demux->disconnect_frontend(dmxdev->demux);
dmxdev->demux->connect_frontend(dmxdev->demux,
dmxdev->dvr_orig_fe);
}
if ((file->f_flags&O_ACCMODE)==O_RDONLY) {
if (dmxdev->dvr_buffer.data) {
void *mem=dmxdev->dvr_buffer.data;
mb();
spin_lock_irq(&dmxdev->lock);
dmxdev->dvr_buffer.data=0;
spin_unlock_irq(&dmxdev->lock);
vfree(mem);
}
}
up(&dmxdev->mutex);
return 0;
}
ssize_t
DmxDevDVRWrite(dmxdev_t *dmxdev, struct file *file,
const char *buf, size_t count, loff_t *ppos)
{
int ret;
if (!dmxdev->demux->write)
return -EOPNOTSUPP;
if ((file->f_flags&O_ACCMODE)!=O_WRONLY)
return -EINVAL;
down(&dmxdev->mutex);
ret=dmxdev->demux->write(dmxdev->demux, buf, count);
up(&dmxdev->mutex);
return ret;
}
ssize_t
DmxDevDVRRead(dmxdev_t *dmxdev, struct file *file,
char *buf, size_t count, loff_t *ppos)
{
int ret;
down(&dmxdev->mutex);
ret= DmxDevBufferRead(&dmxdev->dvr_buffer,
file->f_flags&O_NONBLOCK,
buf, count, ppos);
up(&dmxdev->mutex);
return ret;
}
static inline void
DmxDevFilterStateSet(dmxdev_filter_t *dmxdevfilter, int state)
{
spin_lock_irq(&dmxdevfilter->dev->lock);
dmxdevfilter->state=state;
spin_unlock_irq(&dmxdevfilter->dev->lock);
}
static int
DmxDevSetBufferSize(dmxdev_filter_t *dmxdevfilter, unsigned long size)
{
dmxdev_buffer_t *buf=&dmxdevfilter->buffer;
if (buf->size==size)
return 0;
if (dmxdevfilter->state>=DMXDEV_STATE_GO)
return -EBUSY;
spin_lock_irq(&dmxdevfilter->dev->lock);
if (buf->data)
vfree(buf->data);
buf->data=0;
buf->size=size;
buf->pwrite=buf->pread=0;
spin_unlock_irq(&dmxdevfilter->dev->lock);
if (buf->size) {
void *mem=vmalloc(dmxdevfilter->buffer.size);
if (!mem)
return -ENOMEM;
spin_lock_irq(&dmxdevfilter->dev->lock);
buf->data=mem;
spin_unlock_irq(&dmxdevfilter->dev->lock);
}
return 0;
}
static void
DmxDevFilterTimeout(unsigned long data)
{
dmxdev_filter_t *dmxdevfilter=(dmxdev_filter_t *)data;
dmxdevfilter->buffer.error=-ETIMEDOUT;
spin_lock_irq(&dmxdevfilter->dev->lock);
dmxdevfilter->state=DMXDEV_STATE_TIMEDOUT;
spin_unlock_irq(&dmxdevfilter->dev->lock);
wake_up(&dmxdevfilter->buffer.queue);
}
static void
DmxDevFilterTimer(dmxdev_filter_t *dmxdevfilter)
{
struct dmxSctFilterParams *para=&dmxdevfilter->params.sec;
del_timer(&dmxdevfilter->timer);
if (para->timeout) {
dmxdevfilter->timer.function=DmxDevFilterTimeout;
dmxdevfilter->timer.data=(unsigned long) dmxdevfilter;
dmxdevfilter->timer.expires=jiffies+1+(HZ/2+HZ*para->timeout)/1000;
add_timer(&dmxdevfilter->timer);
}
}
static int
DmxDevSectionCallback(u8 *buffer1, size_t buffer1_len,
u8 *buffer2, size_t buffer2_len,
dmx_section_filter_t *filter,
dmx_success_t success)
{
dmxdev_filter_t *dmxdevfilter=(dmxdev_filter_t *) filter->priv;
int ret;
if (dmxdevfilter->buffer.error)
return 0;
spin_lock(&dmxdevfilter->dev->lock);
if (dmxdevfilter->state!=DMXDEV_STATE_GO) {
spin_unlock(&dmxdevfilter->dev->lock);
return 0;
}
del_timer(&dmxdevfilter->timer);
dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n",
buffer1[0], buffer1[1],
buffer1[2], buffer1[3],
buffer1[4], buffer1[5]);
ret=DmxDevBufferWrite(&dmxdevfilter->buffer, buffer1, buffer1_len);
if (ret==buffer1_len) {
ret=DmxDevBufferWrite(&dmxdevfilter->buffer, buffer2, buffer2_len);
}
if (ret<0) {
dmxdevfilter->buffer.pwrite=dmxdevfilter->buffer.pread;
dmxdevfilter->buffer.error=-EBUFFEROVERFLOW;
}
if (dmxdevfilter->params.sec.flags&DMX_ONESHOT)
dmxdevfilter->state=DMXDEV_STATE_DONE;
spin_unlock(&dmxdevfilter->dev->lock);
wake_up(&dmxdevfilter->buffer.queue);
return 0;
}
static int
DmxDevTSCallback(u8 *buffer1, size_t buffer1_len,
u8 *buffer2, size_t buffer2_len,
dmx_ts_feed_t *feed,
dmx_success_t success)
{
dmxdev_filter_t *dmxdevfilter=(dmxdev_filter_t *) feed->priv;
dmxdev_buffer_t *buffer;
int ret;
if (dmxdevfilter->params.pes.output==DMX_OUT_DECODER)
return 0;
if (dmxdevfilter->params.pes.output==DMX_OUT_TAP)
buffer=&dmxdevfilter->buffer;
else
buffer=&dmxdevfilter->dev->dvr_buffer;
if (buffer->error) {
wake_up(&buffer->queue);
return 0;
}
ret=DmxDevBufferWrite(buffer, buffer1, buffer1_len);
if (ret==buffer1_len)
ret=DmxDevBufferWrite(buffer, buffer2, buffer2_len);
if (ret<0) {
buffer->pwrite=buffer->pread;
buffer->error=-EBUFFEROVERFLOW;
}
wake_up(&buffer->queue);
return 0;
}
/* stop feed but only mark the specified filter as stopped (state set) */
static int
DmxDevFeedStop(dmxdev_filter_t *dmxdevfilter)
{
DmxDevFilterStateSet(dmxdevfilter, DMXDEV_STATE_SET);
switch (dmxdevfilter->type) {
case DMXDEV_TYPE_SEC:
del_timer(&dmxdevfilter->timer);
dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
break;
case DMXDEV_TYPE_PES:
dmxdevfilter->feed.ts->stop_filtering(dmxdevfilter->feed.ts);
break;
default:
return -EINVAL;
}
return 0;
}
/* start feed associated with the specified filter */
static int
DmxDevFeedStart(dmxdev_filter_t *dmxdevfilter)
{
DmxDevFilterStateSet(dmxdevfilter, DMXDEV_STATE_GO);
switch (dmxdevfilter->type) {
case DMXDEV_TYPE_SEC:
dmxdevfilter->feed.sec->start_filtering(dmxdevfilter->feed.sec);
break;
case DMXDEV_TYPE_PES:
dmxdevfilter->feed.ts->start_filtering(dmxdevfilter->feed.ts);
break;
default:
return -EINVAL;
}
return 0;
}
/* restart section feed if it has filters left associated with it,
otherwise release the feed */
static int
DmxDevFeedRestart(dmxdev_filter_t *dmxdevfilter)
{
int i;
dmxdev_t *dmxdev=dmxdevfilter->dev;
dvb_pid_t pid=dmxdevfilter->params.sec.pid;
for (i=0; i<dmxdev->filternum; i++)
if (dmxdev->filter[i].state>=DMXDEV_STATE_GO &&
dmxdev->filter[i].type==DMXDEV_TYPE_SEC &&
dmxdev->filter[i].pid==pid) {
DmxDevFeedStart(&dmxdev->filter[i]);
return 0;
}
dmxdevfilter->dev->demux->
release_section_feed(dmxdev->demux,
dmxdevfilter->feed.sec);
return 0;
}
static int
DmxDevFilterStop(dmxdev_filter_t *dmxdevfilter)
{
if (dmxdevfilter->state<DMXDEV_STATE_GO)
return 0;
switch (dmxdevfilter->type) {
case DMXDEV_TYPE_SEC:
if (!dmxdevfilter->feed.sec)
break;
DmxDevFeedStop(dmxdevfilter);
if (dmxdevfilter->filter.sec)
dmxdevfilter->feed.sec->
release_filter(dmxdevfilter->feed.sec,
dmxdevfilter->filter.sec);
DmxDevFeedRestart(dmxdevfilter);
dmxdevfilter->feed.sec=0;
break;
case DMXDEV_TYPE_PES:
if (!dmxdevfilter->feed.ts)
break;
DmxDevFeedStop(dmxdevfilter);
dmxdevfilter->dev->demux->
release_ts_feed(dmxdevfilter->dev->demux,
dmxdevfilter->feed.ts);
dmxdevfilter->feed.ts=0;
break;
default:
if (dmxdevfilter->state==DMXDEV_STATE_ALLOCATED)
return 0;
return -EINVAL;
}
dmxdevfilter->buffer.pwrite=dmxdevfilter->buffer.pread=0;
return 0;
}
static inline int
DmxDevFilterReset(dmxdev_filter_t *dmxdevfilter)
{
if (dmxdevfilter->state<DMXDEV_STATE_SET)
return 0;
dmxdevfilter->type=DMXDEV_TYPE_NONE;
dmxdevfilter->pid=0xffff;
DmxDevFilterStateSet(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
return 0;
}
static int
DmxDevFilterStart(dmxdev_filter_t *dmxdevfilter)
{
dmxdev_t *dmxdev=dmxdevfilter->dev;
void *mem;
int ret, i;
if (dmxdevfilter->state<DMXDEV_STATE_SET)
return -EINVAL;
if (dmxdevfilter->state>=DMXDEV_STATE_GO)
DmxDevFilterStop(dmxdevfilter);
mem=dmxdevfilter->buffer.data;
if (!mem) {
mem=vmalloc(dmxdevfilter->buffer.size);
spin_lock_irq(&dmxdevfilter->dev->lock);
dmxdevfilter->buffer.data=mem;
spin_unlock_irq(&dmxdevfilter->dev->lock);
if (!dmxdevfilter->buffer.data)
return -ENOMEM;
}
switch (dmxdevfilter->type) {
case DMXDEV_TYPE_SEC:
{
struct dmxSctFilterParams *para=&dmxdevfilter->params.sec;
dmx_section_filter_t **secfilter=&dmxdevfilter->filter.sec;
dmx_section_feed_t **secfeed=&dmxdevfilter->feed.sec;
*secfilter=0;
*secfeed=0;
/* find active filter/feed with same PID */
for (i=0; i<dmxdev->filternum; i++)
if (dmxdev->filter[i].state>=DMXDEV_STATE_GO &&
dmxdev->filter[i].pid==para->pid) {
if (dmxdev->filter[i].type!=DMXDEV_TYPE_SEC)
return -EBUSY;
*secfeed=dmxdev->filter[i].feed.sec;
break;
}
/* if no feed found, try to allocate new one */
if (!*secfeed) {
ret=dmxdev->demux->
allocate_section_feed(dmxdev->demux,
secfeed,
DmxDevSectionCallback);
if (ret<0) {
printk ("could not alloc feed\n");
return ret;
}
ret=(*secfeed)->set(*secfeed, para->pid, 32768, 0,
(para->flags & DMX_CHECK_CRC) ? 1 : 0);
if (ret<0) {
printk ("could not set feed\n");
DmxDevFeedRestart(dmxdevfilter);
return ret;
}
}
else
DmxDevFeedStop(dmxdevfilter);
ret=(*secfeed)->allocate_filter(*secfeed, secfilter);
if (ret<0) {
DmxDevFeedRestart(dmxdevfilter);
dmxdevfilter->feed.sec->
start_filtering(*secfeed);
dprintk ("could not get filter\n");
return ret;
}
(*secfilter)->priv=(void *) dmxdevfilter;
memcpy(&((*secfilter)->filter_value[3]),
&(para->filter.filter[1]), DMX_FILTER_SIZE-1);
memcpy(&(*secfilter)->filter_mask[3],
¶->filter.mask[1], DMX_FILTER_SIZE-1);
(*secfilter)->filter_value[0]=para->filter.filter[0];
(*secfilter)->filter_mask[0]=para->filter.mask[0];
(*secfilter)->filter_mask[1]=0;
(*secfilter)->filter_mask[2]=0;
dmxdevfilter->todo=0;
dmxdevfilter->feed.sec->
start_filtering(dmxdevfilter->feed.sec);
DmxDevFilterTimer(dmxdevfilter);
break;
}
case DMXDEV_TYPE_PES:
{
struct timespec timeout = {0 };
struct dmxPesFilterParams *para=&dmxdevfilter->params.pes;
dmxOutput_t otype;
int ret;
int ts_type;
dmx_ts_pes_t ts_pes;
dmx_ts_feed_t **tsfeed=&dmxdevfilter->feed.ts;
dmxdevfilter->feed.ts=0;
otype=para->output;
ts_pes=(dmx_ts_pes_t) para->pesType;
if (ts_pes<DMX_PES_OTHER)
ts_type=TS_DECODER;
else
ts_type=0;
if (otype==DMX_OUT_TS_TAP)
ts_type|=TS_PACKET;
if (otype==DMX_OUT_TAP)
ts_type|=TS_PAYLOAD_ONLY|TS_PACKET;
ret=dmxdev->demux->allocate_ts_feed(dmxdev->demux,
tsfeed,
DmxDevTSCallback);
if (ret<0)
return ret;
(*tsfeed)->priv=(void *) dmxdevfilter;
ret=(*tsfeed)->set(*tsfeed, para->pid, 188, 32768, 0, timeout);
if (ret<0) {
dmxdev->demux->
release_ts_feed(dmxdev->demux, *tsfeed);
return ret;
}
if ((*tsfeed)->set_type)
ret=(*tsfeed)->set_type(*tsfeed, ts_type, ts_pes);
if (ret<0) {
dmxdev->demux->
release_ts_feed(dmxdev->demux, *tsfeed);
return ret;
}
dmxdevfilter->feed.ts->
start_filtering(dmxdevfilter->feed.ts);
break;
}
default:
return -EINVAL;
}
DmxDevFilterStateSet(dmxdevfilter, DMXDEV_STATE_GO);
return 0;
}
int
DmxDevFilterNum(dmxdev_t *dmxdev)
{
int i, num;
if (!dmxdev->filter)
return 0;
down(&dmxdev->mutex);
for (i=0, num=0; i<dmxdev->filternum; i++)
if (dmxdev->filter[i].state==DMXDEV_STATE_FREE)
num++;
up(&dmxdev->mutex);
return num;
}
int
DmxDevFilterAlloc(dmxdev_t *dmxdev, struct file *file)
{
int i;
dmxdev_filter_t *dmxdevfilter;
if (!dmxdev->filter)
return -EINVAL;
down(&dmxdev->mutex);
for (i=0; i<dmxdev->filternum; i++)
if (dmxdev->filter[i].state==DMXDEV_STATE_FREE)
break;
if (i==dmxdev->filternum) {
up(&dmxdev->mutex);
return -EMFILE;
}
dmxdevfilter=&dmxdev->filter[i];
file->private_data=dmxdevfilter;
DmxDevBufferInit(&dmxdevfilter->buffer);
dmxdevfilter->type=DMXDEV_TYPE_NONE;
DmxDevFilterStateSet(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
dmxdevfilter->feed.ts=0;
init_timer(&dmxdevfilter->timer);
up(&dmxdev->mutex);
//printk("free filters = %d\n", DmxDevFilterNum(dmxdev));
return 0;
}
int
DmxDevFilterFree(dmxdev_t *dmxdev, struct file *file)
{
dmxdev_filter_t *dmxdevfilter;
down(&dmxdev->mutex);
if (!(dmxdevfilter=DmxDevFile2Filter(dmxdev, file))) {
up(&dmxdev->mutex);
return -EINVAL;
}
DmxDevFilterStop(dmxdevfilter);
DmxDevFilterReset(dmxdevfilter);
if (dmxdevfilter->buffer.data) {
void *mem=dmxdevfilter->buffer.data;
spin_lock_irq(&dmxdev->lock);
dmxdevfilter->buffer.data=0;
spin_unlock_irq(&dmxdev->lock);
vfree(mem);
}
DmxDevFilterStateSet(dmxdevfilter, DMXDEV_STATE_FREE);
wake_up(&dmxdevfilter->buffer.queue);
up(&dmxdev->mutex);
//printk("free filters = %d\n", DmxDevFilterNum(dmxdev));
return 0;
}
static int
DmxDevFilterSet(dmxdev_t *dmxdev,
dmxdev_filter_t *dmxdevfilter,
struct dmxSctFilterParams *params)
{
dprintk ("function : %s\n", __FUNCTION__);
DmxDevFilterStop(dmxdevfilter);
dmxdevfilter->type=DMXDEV_TYPE_SEC;
dmxdevfilter->pid=params->pid;
memcpy(&dmxdevfilter->params.sec,
params, sizeof(struct dmxSctFilterParams));
DmxDevFilterStateSet(dmxdevfilter, DMXDEV_STATE_SET);
if (params->flags&DMX_IMMEDIATE_START)
return DmxDevFilterStart(dmxdevfilter);
return 0;
}
static int
DmxDevPesFilterSet(dmxdev_t *dmxdev,
dmxdev_filter_t *dmxdevfilter,
struct dmxPesFilterParams *params)
{
DmxDevFilterStop(dmxdevfilter);
if (params->pesType>DMX_PES_OTHER || params->pesType<0)
return -EINVAL;
dmxdevfilter->type=DMXDEV_TYPE_PES;
dmxdevfilter->pid=params->pid;
memcpy(&dmxdevfilter->params, params, sizeof(struct dmxPesFilterParams));
DmxDevFilterStateSet(dmxdevfilter, DMXDEV_STATE_SET);
if (params->flags&DMX_IMMEDIATE_START)
return DmxDevFilterStart(dmxdevfilter);
return 0;
}
int
DmxDevInit(dmxdev_t *dmxdev)
{
int i;
if (dmxdev->demux->open(dmxdev->demux)<0)
return -EUSERS;
dmxdev->filter=vmalloc(dmxdev->filternum*sizeof(dmxdev_filter_t));
if (!dmxdev->filter)
return -ENOMEM;
dmxdev->dvr=vmalloc(dmxdev->filternum*sizeof(dmxdev_dvr_t));
if (!dmxdev->dvr) {
vfree(dmxdev->filter);
dmxdev->filter=0;
return -ENOMEM;
}
sema_init(&dmxdev->mutex, 1);
spin_lock_init(&dmxdev->lock);
for (i=0; i<dmxdev->filternum; i++) {
dmxdev->filter[i].dev=dmxdev;
dmxdev->filter[i].buffer.data=0;
DmxDevFilterStateSet(&dmxdev->filter[i], DMXDEV_STATE_FREE);
dmxdev->dvr[i].dev=dmxdev;
dmxdev->dvr[i].buffer.data=0;
DmxDevFilterStateSet(&dmxdev->filter[i], DMXDEV_STATE_FREE);
DmxDevDVRStateSet(&dmxdev->dvr[i], DMXDEV_STATE_FREE);
}
DmxDevBufferInit(&dmxdev->dvr_buffer);
MOD_INC_USE_COUNT;
return 0;
}
void
DmxDevRelease(dmxdev_t *dmxdev)
{
if (dmxdev->filter) {
vfree(dmxdev->filter);
dmxdev->filter=0;
}
if (dmxdev->dvr) {
vfree(dmxdev->dvr);
dmxdev->dvr=0;
}
dmxdev->demux->close(dmxdev->demux);
MOD_DEC_USE_COUNT;
}
static ssize_t
DmxDevReadSec(dmxdev_filter_t *dfil, struct file *file,
char *buf, size_t count, loff_t *ppos)
{
int result, hcount;
int done=0;
if (dfil->todo<=0) {
hcount=3+dfil->todo;
if (hcount>count)
hcount=count;
result=DmxDevBufferRead(&dfil->buffer, file->f_flags&O_NONBLOCK,
buf, hcount, ppos);
if (result<0) {
dfil->todo=0;
return result;
}
if (copy_from_user(dfil->secheader-dfil->todo, buf, result))
return -EFAULT;
buf+=result;
done=result;
count-=result;
dfil->todo-=result;
if (dfil->todo>-3)
return done;
dfil->todo=((dfil->secheader[1]<<8)|dfil->secheader[2])&0xfff;
if (!count)
return done;
}
if (count>dfil->todo)
count=dfil->todo;
result=DmxDevBufferRead(&dfil->buffer, file->f_flags&O_NONBLOCK,
buf, count, ppos);
if (result<0)
return result;
dfil->todo-=result;
return (result+done);
}
ssize_t
DmxDevRead(dmxdev_t *dmxdev, struct file *file,
char *buf, size_t count, loff_t *ppos)
{
dmxdev_filter_t *dmxdevfilter=DmxDevFile2Filter(dmxdev, file);
int ret=0;
down(&dmxdev->mutex);
if (dmxdevfilter->type==DMXDEV_TYPE_SEC)
ret=DmxDevReadSec(dmxdevfilter, file, buf, count, ppos);
else
ret=DmxDevBufferRead(&dmxdevfilter->buffer,
file->f_flags&O_NONBLOCK,
buf, count, ppos);
up(&dmxdev->mutex);
return ret;
}
int DmxDevIoctl(dmxdev_t *dmxdev, struct file *file,
unsigned int cmd, unsigned long arg)
{
void *parg=(void *)arg;
int ret=0;
dmxdev_filter_t *dmxdevfilter=DmxDevFile2Filter(dmxdev, file);
if (!dmxdevfilter)
return -EINVAL;
down(&dmxdev->mutex);
switch (cmd) {
case DMX_START:
if (dmxdevfilter->state<DMXDEV_STATE_SET)
ret=-EINVAL;
else
ret=DmxDevFilterStart(dmxdevfilter);
break;
case DMX_STOP:
ret=DmxDevFilterStop(dmxdevfilter);
break;
case DMX_SET_FILTER:
{
struct dmxSctFilterParams params;
if (copy_from_user(¶ms, parg, sizeof(params)))
ret=-EFAULT;
else
ret=DmxDevFilterSet(dmxdev, dmxdevfilter, ¶ms);
break;
}
case DMX_SET_PES_FILTER:
{
struct dmxPesFilterParams params;
if (copy_from_user(¶ms, parg, sizeof(params)))
ret=-EFAULT;
else
ret=DmxDevPesFilterSet(dmxdev, dmxdevfilter, ¶ms);
break;
}
case DMX_SET_BUFFER_SIZE:
ret=DmxDevSetBufferSize(dmxdevfilter, arg);
break;
case DMX_GET_EVENT:
break;
case DMX_GET_PES_PIDS:
{
dvb_pid_t pids[5];
if (!dmxdev->demux->get_pes_pids) {
ret=-EINVAL;
break;
}
dmxdev->demux->get_pes_pids(dmxdev->demux, pids);
if (copy_to_user(parg, pids, 5*sizeof(dvb_pid_t)))
ret=-EFAULT;
break;
}
default:
ret=-EINVAL;
}
up(&dmxdev->mutex);
return ret;
}
unsigned int
DmxDevPoll(dmxdev_t *dmxdev, struct file *file, poll_table * wait)
{
dmxdev_filter_t *dmxdevfilter=DmxDevFile2Filter(dmxdev, file);
if (!dmxdevfilter)
return -EINVAL;
if (dmxdevfilter->state==DMXDEV_STATE_FREE)
return 0;
if (dmxdevfilter->buffer.pread!=dmxdevfilter->buffer.pwrite ||
dmxdevfilter->buffer.error)
return (POLLIN | POLLRDNORM | POLLPRI);
if (dmxdevfilter->state!=DMXDEV_STATE_GO)
return 0;
poll_wait(file, &dmxdevfilter->buffer.queue, wait);
if (dmxdevfilter->state==DMXDEV_STATE_FREE)
return 0;
if (dmxdevfilter->buffer.pread!=dmxdevfilter->buffer.pwrite ||
dmxdevfilter->buffer.error)
return (POLLIN | POLLRDNORM | POLLPRI);
return 0;
}
int DmxDevDVRIoctl(dmxdev_t *dmxdev, struct file *file,
unsigned int cmd, unsigned long arg)
{
//void *parg=(void *)arg;
int ret=0;
down(&dmxdev->mutex);
switch (cmd) {
case DMX_SET_BUFFER_SIZE:
// FIXME: implement
ret=0;
break;
default:
ret=-EINVAL;
}
up(&dmxdev->mutex);
return ret;
}
unsigned int
DmxDevDVRPoll(dmxdev_t *dmxdev, struct file *file, poll_table * wait)
{
if ((file->f_flags&O_ACCMODE)==O_RDONLY) {
if (dmxdev->dvr_buffer.pread!=dmxdev->dvr_buffer.pwrite)
return (POLLIN | POLLRDNORM | POLLPRI);
poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
if (dmxdev->dvr_buffer.pread!=dmxdev->dvr_buffer.pwrite)
return (POLLIN | POLLRDNORM | POLLPRI);
return 0;
} else
return (POLLOUT | POLLWRNORM | POLLPRI);
}
#ifdef MODULE
#ifdef EXPORT_SYMTAB
EXPORT_SYMBOL(DmxDevInit);
EXPORT_SYMBOL(DmxDevRelease);
EXPORT_SYMBOL(DmxDevDVROpen);
EXPORT_SYMBOL(DmxDevDVRClose);
EXPORT_SYMBOL(DmxDevDVRRead);
EXPORT_SYMBOL(DmxDevDVRWrite);
EXPORT_SYMBOL(DmxDevDVRIoctl);
EXPORT_SYMBOL(DmxDevDVRPoll);
EXPORT_SYMBOL(DmxDevFilterAlloc);
EXPORT_SYMBOL(DmxDevFilterFree);
EXPORT_SYMBOL(DmxDevRead);
EXPORT_SYMBOL(DmxDevIoctl);
EXPORT_SYMBOL(DmxDevPoll);
#endif
#endif
LinuxTV legacy CVS <linuxtv.org/cvs>