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/*
* vdr-ttxtsubs - A plugin for the Linux Video Disk Recorder
* Copyright (c) 2003 - 2008 Ragnar Sundblad <ragge@nada.kth.se>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 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 General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <stdint.h>
#include <stdlib.h>
#include <vdr/vdrttxtsubshooks.h>
#include <vdr/device.h>
#include <vdr/channels.h>
#include <vdr/receiver.h>
#include <vdr/ringbuffer.h>
#include "siinfo.h"
#include "ttxtsubsfilter.h"
#include "ttxtsubsrecorder.h"
#include "ttxtsubsreceiver.h"
#include "teletext.h"
#define MAXPACKETSIZE 20000
// ----- cTtxtSubsRecorder -----
cTtxtSubsRecorder::cTtxtSubsRecorder(cDevice *dev, const cChannel *ch)
:
mDev(dev),
mSid(ch->Sid()),
mVid(ch->Vpid()),
mTtxtinfo(NULL),
mReceiver(NULL),
mPacketBuffer(NULL)
{
mTtxtinfo = (struct ttxtinfo *) malloc(sizeof(*mTtxtinfo));
struct ttxtpidinfo *pi = NULL;
int pid, page;
char lang[4] = "";
if(GetTtxtInfo(dev->CardIndex(), ch, mTtxtinfo)) {
esyslog("ttxtsubs: cTtxtSubsRecorder::cTtxtSubsRecorder: GetTtxtSubtitleInfo error!");
} else {
pi = FindSubs(mTtxtinfo, &pid, &page, lang);
if(!pi && mTtxtinfo->pidcount > 0) {
pi = &(mTtxtinfo->p[0]);
isyslog("ttxtsubs: Selected language not found, just recording first teletext pid found.");
}
if(pi) {
mReceiver = new cTtxtSubsReceiver(ch->GetChannelID(), ch->Ca(), pi);
mPacketBuffer = (uint8_t *) malloc(MAXPACKETSIZE);
} else {
isyslog("ttxtsubs: No teletext pid found, not recording any (obviously).");
}
}
}
cTtxtSubsRecorder::~cTtxtSubsRecorder(void)
{
if(mReceiver) {
cTtxtSubsReceiver *tmp = mReceiver;
mReceiver = NULL;
delete tmp;
}
if(mTtxtinfo) {
FreeTtxtInfoData(mTtxtinfo);
free(mTtxtinfo);
}
if(mPacketBuffer)
free(mPacketBuffer);
}
uint8_t *cTtxtSubsRecorder::GetPacket(uint8_t **outbuf, size_t *lenp)
{
int done = 0;
size_t len;
uint8_t *b = (uint8_t *) mPacketBuffer;
uint8_t line[46];
encodedPTS pts;
*outbuf = NULL;
if(!mReceiver)
return *outbuf;
len = 46; // skip PES header area
if(mReceiver->Get(line, &pts)) {
// if first line is a Y0, insert an index page
// XXX This isn't really correct, we don't know if there is parallel magazine
// transmission and a page in the index pages' mag is in progress...
int mp;
//int mag; // X in ETSI EN 300 706
int packet; // Y
struct ttxt_data_field *d = (struct ttxt_data_field *) line;
mp = UNHAM_INV(d->mag_addr_ham[0], d->mag_addr_ham[1]);
//mag = mp & 0x7;
packet = (mp >> 3) & 0x1f;
if(packet == 0) {
char **iplines;
int iplcount;
mReceiver->IndexPage(&iplines, &iplcount);
for(int i = 0; i < iplcount; i++) {
memcpy(b + len, (char *) iplines[i], 46);
len += 46;
}
}
// insert the line
memcpy(b + len, line, 46);
len += 46;
}
// get the rest of the lines
while((len < (MAXPACKETSIZE - 184)) && !done) {
if(mReceiver->Get(b + len)) {
len += 46;
} else
done = 1;
}
if(len > 46) { // we have data, make a PES packet according to ETSI EN 300 472
// fill out packet with stuffing data to 184 byte boundary
size_t stufflen = 184 - (len % 184);
if(stufflen == 184)
stufflen = 0;
memset((char *) b + len, 0xff, stufflen);
len += stufflen;
// fill in header
uint8_t header[] = {0x00, 0x00, 0x01, 0xbd, // private data stream 1
0x00, 0x00, // len
0x80, // 10 and flags
0x00, // PTS_DTS_flags and other flags
0x24, // PES_header_data_length
0xff, 0xff, 0xff, 0xff, 0xff}; // PTS
memcpy((char *) b, (char *) header, sizeof(header));
b[4] = (len-6) >> 8;
b[5] = (len-6) & 0xff;
#define TEST_RECORD_PTS 1
#if TEST_RECORD_PTS
if(pts.valid) {
b[7] |= 0x80;
b[9] = pts.data[0];
b[10] = pts.data[1];
b[11] = pts.data[2];
b[12] = pts.data[3];
b[13] = pts.data[4];
}
#endif
memset((char *) b + sizeof(header), 0xff, 45 - sizeof(header)); // add stuffing bytes
b[45] = 0x1f; // EBU data, our payload type to indicate we have filtered data
*outbuf = b;
*lenp = len;
}
#if 0
if(*outbuf) { // XXX
dprint("cTtxtSubsRecorder::GetPacket: len: %d\n", len);
for(size_t i = 46; i < len; i +=46) {
struct ttxt_data_field *d = (struct ttxt_data_field *) b + i;
if(d->data_unit_id != 0xff)
print_line((char *) b + i);
}
}
#endif
return *outbuf;
}
void cTtxtSubsRecorder::DeviceAttach(void)
{
if(mReceiver)
mDev->AttachReceiver(mReceiver);
}
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