From 76ac85e366bfc27b3b688a4f13031c0735ea2436 Mon Sep 17 00:00:00 2001 From: Tobias Grimm Date: Sat, 13 Dec 2008 10:35:43 +0100 Subject: Initial version 0.0.1 --- COPYING | 340 ++++++++++++++++++++++++ HISTORY | 6 + Makefile | 107 ++++++++ README | 90 +++++++ VDR.patch | 250 ++++++++++++++++++ siinfo.c | 583 ++++++++++++++++++++++++++++++++++++++++++ siinfo.h | 36 +++ teletext-chars.h | 80 ++++++ teletext-tables.h | 81 ++++++ teletext.c | 724 ++++++++++++++++++++++++++++++++++++++++++++++++++++ teletext.h | 101 ++++++++ ttxtsubs.c | 357 ++++++++++++++++++++++++++ ttxtsubs.h | 1 + ttxtsubsdisplay.c | 331 ++++++++++++++++++++++++ ttxtsubsdisplay.h | 35 +++ ttxtsubsdisplayer.c | 256 +++++++++++++++++++ ttxtsubsdisplayer.h | 47 ++++ ttxtsubsfilter.c | 158 ++++++++++++ ttxtsubsfilter.h | 27 ++ ttxtsubsreceiver.c | 253 ++++++++++++++++++ ttxtsubsreceiver.h | 34 +++ ttxtsubsrecorder.c | 167 ++++++++++++ ttxtsubsrecorder.h | 23 ++ utils.h | 2 + vdrttxtsubshooks.c | 44 ++++ vdrttxtsubshooks.h | 36 +++ 26 files changed, 4169 insertions(+) create mode 100644 COPYING create mode 100644 HISTORY create mode 100644 Makefile create mode 100644 README create mode 100644 VDR.patch create mode 100644 siinfo.c create mode 100644 siinfo.h create mode 100644 teletext-chars.h create mode 100644 teletext-tables.h create mode 100644 teletext.c create mode 100644 teletext.h create mode 100644 ttxtsubs.c create mode 100644 ttxtsubs.h create mode 100644 ttxtsubsdisplay.c create mode 100644 ttxtsubsdisplay.h create mode 100644 ttxtsubsdisplayer.c create mode 100644 ttxtsubsdisplayer.h create mode 100644 ttxtsubsfilter.c create mode 100644 ttxtsubsfilter.h create mode 100644 ttxtsubsreceiver.c create mode 100644 ttxtsubsreceiver.h create mode 100644 ttxtsubsrecorder.c create mode 100644 ttxtsubsrecorder.h create mode 100644 utils.h create mode 100644 vdrttxtsubshooks.c create mode 100644 vdrttxtsubshooks.h diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..5b6e7c6 --- /dev/null +++ b/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/HISTORY b/HISTORY new file mode 100644 index 0000000..a38ae75 --- /dev/null +++ b/HISTORY @@ -0,0 +1,6 @@ +VDR Plugin 'ttxtsubs' Revision History +-------------------------------------- + +2003-03-07: Version 0.0.1 + +- Initial revision. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..9f9c5fa --- /dev/null +++ b/Makefile @@ -0,0 +1,107 @@ +# +# Makefile for a Video Disk Recorder plugin +# +# $Id: Makefile,v 1.16 2003/03/07 03:01:17 ragge Exp $ + +# The official name of this plugin. +# This name will be used in the '-P...' option of VDR to load the plugin. +# By default the main source file also carries this name. +# +PLUGIN = ttxtsubs + +### The version number of this plugin (taken from the main source file): + +VERSION = $(shell grep 'static const char \*VERSION *=' $(PLUGIN).c | awk '{ print $$6 }' | sed -e 's/[";]//g') + +### The C++ compiler and options: + +CXX ?= g++ +CXXFLAGS ?= -O2 -Wall -Woverloaded-virtual + +### The directory environment: + +DVBDIR = ../../../../DVB +VDRDIR = ../../.. +LIBDIR = ../../lib +TMPDIR = /tmp + +### Allow user defined options to overwrite defaults: + +-include $(VDRDIR)/Make.config + +### The version number of VDR (taken from VDR's "config.h"): + +VDRVERSION = $(shell grep 'define VDRVERSION ' $(VDRDIR)/config.h | awk '{ print $$3 }' | sed -e 's/"//g') + +### The name of the distribution archive: + +ARCHIVE = $(PLUGIN)-$(VERSION) +PACKAGE = vdr-$(ARCHIVE) +BUPPACKAGE = vdr-$(ARCHIVE)-bup-$(shell date +%y%m%d-%H%M%S) + +### Includes and Defines (add further entries here): + +INCLUDES += -I$(VDRDIR)/include -I$(DVBDIR)/include + +DEFINES += -DPLUGIN_NAME_I18N='"$(PLUGIN)"' + +### The object files (add further files here): + +OBJS = $(PLUGIN).o ttxtsubsdisplayer.o ttxtsubsdisplay.o teletext.o siinfo.o \ + ttxtsubsfilter.o ttxtsubsrecorder.o ttxtsubsreceiver.o + +SOURCEFILES = *.c *.h [A-Z]???* + +### Implicit rules: + +%.o: %.c + $(CXX) $(CXXFLAGS) -c $(DEFINES) $(INCLUDES) $< + +# Dependencies: + +MAKEDEP = g++ -MM -MG +DEPFILE = .dependencies +$(DEPFILE): Makefile + @$(MAKEDEP) $(DEFINES) $(INCLUDES) $(OBJS:%.o=%.c) > $@ + +-include $(DEPFILE) + +### Targets: + +all: libvdr-$(PLUGIN).so + +libvdr-$(PLUGIN).so: $(OBJS) + $(CXX) $(CXXFLAGS) -shared $(OBJS) -o $@ + @cp $@ $(LIBDIR)/$@.$(VDRVERSION) + +dist: clean + @-rm -rf $(TMPDIR)/$(ARCHIVE) + @mkdir $(TMPDIR)/$(ARCHIVE) + @cp -a $(SOURCEFILES) $(TMPDIR)/$(ARCHIVE) + @tar czf $(PACKAGE).tgz -C $(TMPDIR) $(ARCHIVE) + @-rm -rf $(TMPDIR)/$(ARCHIVE) + @echo Distribution package created as $(PACKAGE).tgz + +bup: clean patch + @-rm -rf $(TMPDIR)/$(ARCHIVE) + @mkdir $(TMPDIR)/$(ARCHIVE) + @cp -a $(SOURCEFILES) RCS $(TMPDIR)/$(ARCHIVE) + @tar czf $(BUPPACKAGE).tgz -C $(TMPDIR) $(ARCHIVE) + @-rm -rf $(TMPDIR)/$(ARCHIVE) + @echo Distribution package created as $(BUPPACKAGE).tgz + @echo making backup... + @sh RCS/backup.sh $(BUPPACKAGE).tgz + @echo done. + +clean: + @-rm -f $(OBJS) $(DEPFILE) *.so *.tgz core* *~ + +ci: patch + ci -u $(SOURCEFILES) + +patch: + co -l xVDR.patch.temp vdrttxtsubshooks.c vdrttxtsubshooks.h + (cd ../../../; diff -upr ./DIST/* .) | grep -v "Only in ." > xVDR.patch.temp + cp -p ../../../vdrttxtsubshooks.c . + cp -p ../../../vdrttxtsubshooks.h . + ci -u xVDR.patch.temp vdrttxtsubshooks.c vdrttxtsubshooks.h diff --git a/README b/README new file mode 100644 index 0000000..48c3000 --- /dev/null +++ b/README @@ -0,0 +1,90 @@ +This is a "plugin" for the Video Disk Recorder (VDR). + +Written by: Ragnar Sundblad + +Project's homepage: - + +Latest version available at: ftp://ftp.nada.kth.se/pub/home/ragge/vdr/ + +See the file COPYING for license information. + + +Description: + +This plugin implements displaying, recording and replaying teletext +based subtitles using the on screen display. + + +Long Description: + +The teletext decoder/displayer is currently very basic and limited. It +can't show colours and it doesn't take into account the editors +attempts to place the text on different places on the screen. + +The DVB drivers from the Metzlers as of late February 2003 and +Convergence/linuxtv.org as of March 5 2003 have firmware fixes against +OSD problems. (Thanks a lot guys!) An upgrade to either of those is +strongly recommended. If the plugin is used with earlier firmware, +data may get lost when the OSD is updated possibly resulting in bad +video and audio, especially when recording or playing recordings. + +Both the live displayer and the recorder finds subtitling PID and page +for the selected language, and optionally for the hearing impaired, by +scanning the DVB Service Information. You don't have to set up channel +Tpids. Though, if you have set a Sid it will be used to speed up +Service Information scanning. (Can't say it makes much of a +difference, though). + +The recorder writes a filtered subset of the teletext data with only +the subtitle pages and an index page at page 100 (or subsequent page +if that page number is used for subtitling). The filtered stream is +written as a private_stream_1 with subtype 0x1f (the last teletext +subtype). An ordinary teletext PES stream recorded for example by +setting Dpid1 to a teletext PID will typically have a subtype of +0x10. + +The recording player scans the index page to find the selected +language. (If it can't find an index page it will use the page number +from the current channel. This may be removed in the future.) The +index page itself can't be viewed with this plugin. + +If you can't select your language, look up its 3 letter acronym in + and/or +check the output from ttxtsubs, and enter the language code in your +VDR setup.conf at ttxtsubs.language. This will hopefully be easier in +a future release. + +Consider this code alpha quality. The code could use some major +cleanup. The program design was from the beginning just not, as it +started as a test hack, and it has from then been incompletely +reworked a few times. + + +Installation: + +This plugin is written for VDR 1.1.25. It currently needs a few hooks +in, and changes to, VDR to work. A patch file is included. The patches +should be harmless if you don't have the plugin loaded, so even if you +patch VDR and later decide not to use this plugin you don't +necessarily have to reinstall VDR. It is probably possible to build +the plugin for other version of VDR, but don't count on it. + +Steps: + +As usual, unpack the plugin and make a link: + cd ..../vdr-1.1.25/PLUGINS/src + tar zxvf ..../vdr-ttxtsubs-0.0.1.tgz + ln -s ttxtsubs-0.0.1 ttxtsubs + +Go back to your VDR directory and install the patches and the new files: + cd ../../ + cp PLUGINS/src/ttxtsubs-0.0.1/vdrttxtsubshooks.[ch] . + patch -b < PLUGINS/src/ttxtsubs-0.0.1/VDR.patch + +Rebuild VDR: + make clean + make include-dir + make + make plugins + +Now you should be able to start VDR with "-P ttxtsubs". diff --git a/VDR.patch b/VDR.patch new file mode 100644 index 0000000..3c825c3 --- /dev/null +++ b/VDR.patch @@ -0,0 +1,250 @@ +diff -upr ./DIST/vdr-1.1.25/Makefile ./Makefile +--- ./DIST/vdr-1.1.25/Makefile 2003-01-06 13:28:09.000000000 +0100 ++++ ./Makefile 2003-03-07 03:19:33.000000000 +0100 +@@ -36,7 +36,8 @@ OBJS = audio.o channels.o ci.o config.o + dvbplayer.o dvbspu.o eit.o eitscan.o font.o i18n.o interface.o keys.o\ + lirc.o menu.o menuitems.o osdbase.o osd.o player.o plugin.o rcu.o\ + receiver.o recorder.o recording.o remote.o remux.o ringbuffer.o sources.o\ +- spu.o status.o svdrp.o thread.o timers.o tools.o transfer.o vdr.o videodir.o ++ spu.o status.o svdrp.o thread.o timers.o tools.o transfer.o vdr.o videodir.o\ ++ vdrttxtsubshooks.o + + OSDFONT = -adobe-helvetica-medium-r-normal--23-*-100-100-p-*-iso8859-1 + FIXFONT = -adobe-courier-bold-r-normal--25-*-100-100-m-*-iso8859-1 +diff -upr ./DIST/vdr-1.1.25/dvbplayer.c ./dvbplayer.c +--- ./DIST/vdr-1.1.25/dvbplayer.c 2003-02-15 11:38:59.000000000 +0100 ++++ ./dvbplayer.c 2003-03-07 03:52:55.000000000 +0100 +@@ -13,6 +13,7 @@ + #include "ringbuffer.h" + #include "thread.h" + #include "tools.h" ++#include "vdrttxtsubshooks.h" + + // --- cBackTrace ---------------------------------------------------------- + +@@ -318,6 +319,12 @@ void cDvbPlayer::StripAudioPackets(uchar + int l = b[i + 4] * 256 + b[i + 5] + 6; + switch (c) { + case 0xBD: // dolby ++#ifdef VDRTTXTSUBSHOOKS ++ if (b[i + 8] == 0x24 && b[i + 45] >= 0x10 && b[i + 45] < 0x20) { ++ break; // run these through the ring buffer to get somewhat correct ++ // timing for the subtitles ++ } else ++#endif + if (Except) + PlayAudio(&b[i], l); + // continue with deleting the data - otherwise it disturbs DVB replay +@@ -347,6 +354,40 @@ void cDvbPlayer::StripAudioPackets(uchar + } + } + ++#ifdef VDRTTXTSUBSHOOKS ++static void StripTtxtPackets(uchar *b, int Length) ++{ ++ for (int i = 0; i < Length - 6; i++) { ++ if (b[i] == 0x00 && b[i + 1] == 0x00 && b[i + 2] == 0x01) { ++ uchar c = b[i + 3]; ++ int l = b[i + 4] * 256 + b[i + 5] + 6; ++ switch (c) { ++ case 0xBD: // dolby ++ { ++ if (b[i + 8] == 0x24 && b[i + 45] >= 0x10 && b[i + 45] < 0x20) { ++ // EBU Teletext data, ETSI EN 300 472 ++ cVDRTtxtsubsHookListener::Hook()->PlayerTeletextData(&b[i], l); ++ } ++ // continue with deleting the data - otherwise it disturbs DVB replay ++ int n = l; ++ for (int j = i; j < Length && n--; j++) ++ b[j] = 0x00; ++ break; ++ } ++ default: ++ break; ++ } ++ if (l) ++ i += l - 1; // the loop increments, too! ++ } ++ /*XXX ++ else ++ esyslog("ERROR: broken packet header"); ++ XXX*/ ++ } ++} ++#endif ++ + bool cDvbPlayer::NextFile(uchar FileNumber, int FileOffset) + { + if (FileNumber > 0) +@@ -514,6 +555,11 @@ void cDvbPlayer::Action(void) + p = playFrame->Data(); + pc = playFrame->Count(); + } ++#ifdef VDRTTXTSUBSHOOKS ++ // pick out the teletext packets here ++ if(p) ++ StripTtxtPackets((uchar *) p, pc); ++#endif + if (p) { + int w = PlayVideo(p, pc); + if (w > 0) { +diff -upr ./DIST/vdr-1.1.25/menu.c ./menu.c +--- ./DIST/vdr-1.1.25/menu.c 2003-02-09 13:55:38.000000000 +0100 ++++ ./menu.c 2003-03-07 03:38:14.000000000 +0100 +@@ -2931,8 +2931,18 @@ cRecordControl::cRecordControl(cDevice * + fileName = strdup(Recording.FileName()); + cRecordingUserCommand::InvokeCommand(RUC_BEFORERECORDING, fileName); + const cChannel *ch = timer->Channel(); ++#ifdef VDRTTXTSUBSHOOKS ++ cTtxtSubsRecorderBase *subsRecorder = cVDRTtxtsubsHookListener::Hook() ++ ->NewTtxtSubsRecorder(device, ch); ++ recorder = new cRecorder(fileName, ch->Ca(), timer->Priority(), ch->Vpid(), ch->Apid1(), ch->Apid2(), ch->Dpid1(), ch->Dpid2(), subsRecorder); ++#else + recorder = new cRecorder(fileName, ch->Ca(), timer->Priority(), ch->Vpid(), ch->Apid1(), ch->Apid2(), ch->Dpid1(), ch->Dpid2()); ++#endif + if (device->AttachReceiver(recorder)) { ++#ifdef VDRTTXTSUBSHOOKS ++ if(subsRecorder) ++ subsRecorder->DeviceAttach(); ++#endif + Recording.WriteSummary(); + cStatus::MsgRecording(device, Recording.Name()); + } +diff -upr ./DIST/vdr-1.1.25/menu.h ./menu.h +--- ./DIST/vdr-1.1.25/menu.h 2003-01-12 15:54:05.000000000 +0100 ++++ ./menu.h 2003-03-07 03:33:28.000000000 +0100 +@@ -14,6 +14,7 @@ + #include "device.h" + #include "osd.h" + #include "dvbplayer.h" ++#include "vdrttxtsubshooks.h" + #include "recorder.h" + #include "recording.h" + +diff -upr ./DIST/vdr-1.1.25/osd.c ./osd.c +--- ./DIST/vdr-1.1.25/osd.c 2002-12-08 14:17:13.000000000 +0100 ++++ ./osd.c 2003-03-07 03:55:32.000000000 +0100 +@@ -12,6 +12,7 @@ + #include "device.h" + #include "i18n.h" + #include "status.h" ++#include "vdrttxtsubshooks.h" + + // --- cOsd ------------------------------------------------------------------ + +@@ -96,6 +97,9 @@ void cOsd::Open(int w, int h) + d *= lineHeight; + int x = (720 - w + charWidth) / 2; //TODO PAL vs. NTSC??? + int y = (576 - Setup.OSDheight * lineHeight) / 2 + d; ++#ifdef VDRTTXTSUBSHOOKS ++ cVDRTtxtsubsHookListener::Hook()->HideOSD(); ++#endif + //XXX + osd = OpenRaw(x, y); + //XXX TODO this should be transferred to the places where the individual windows are requested (there's too much detailed knowledge here!) +@@ -136,6 +140,9 @@ void cOsd::Close(void) + delete osd; + osd = NULL; + #endif ++#ifdef VDRTTXTSUBSHOOKS ++ cVDRTtxtsubsHookListener::Hook()->ShowOSD(); ++#endif + } + + void cOsd::Clear(void) +diff -upr ./DIST/vdr-1.1.25/recorder.c ./recorder.c +--- ./DIST/vdr-1.1.25/recorder.c 2003-01-25 17:23:36.000000000 +0100 ++++ ./recorder.c 2003-03-07 03:54:10.000000000 +0100 +@@ -10,6 +10,8 @@ + #include + #include + #include ++#include ++#include "vdrttxtsubshooks.h" + #include "recorder.h" + + // The size of the array used to buffer video data: +@@ -19,7 +21,11 @@ + #define MINFREEDISKSPACE (512) // MB + #define DISKCHECKINTERVAL 100 // seconds + ++#ifdef VDRTTXTSUBSHOOKS ++cRecorder::cRecorder(const char *FileName, int Ca, int Priority, int VPid, int APid1, int APid2, int DPid1, int DPid2, cTtxtSubsRecorderBase *tsr) ++#else + cRecorder::cRecorder(const char *FileName, int Ca, int Priority, int VPid, int APid1, int APid2, int DPid1, int DPid2) ++#endif + :cReceiver(Ca, Priority, 5, VPid, APid1, APid2, DPid1, DPid2) + { + ringBuffer = NULL; +@@ -30,6 +36,9 @@ cRecorder::cRecorder(const char *FileNam + fileSize = 0; + active = false; + lastDiskSpaceCheck = time(NULL); ++#ifdef VDRTTXTSUBSHOOKS ++ ttxtSubsRecorder = tsr; ++#endif + isyslog("record %s", FileName); + + // Create directories if necessary: +@@ -57,6 +66,10 @@ cRecorder::cRecorder(const char *FileNam + cRecorder::~cRecorder() + { + Detach(); ++#ifdef VDRTTXTSUBSHOOKS ++ if(ttxtSubsRecorder) ++ delete ttxtSubsRecorder; ++#endif + delete index; + delete fileName; + delete remux; +@@ -130,6 +143,19 @@ void cRecorder::Action(void) + break; + } + fileSize += Result; ++#ifdef VDRTTXTSUBSHOOKS ++ // not sure if the pictureType test is needed, but it seems we can get ++ // incomplete pes packets from remux if we are not getting pictures? ++ if (ttxtSubsRecorder && pictureType != NO_PICTURE) { ++ uint8_t *subsp; ++ size_t len; ++ if(ttxtSubsRecorder->GetPacket(&subsp, &len)) { ++ safe_write(recordFile, subsp, len); ++ fileSize += len; ++ // fprintf(stderr, "cRecorder::Action: Wrote ttxtsubs data len %d\n", len); // XXX ++ } ++ } ++#endif + } + else + break; +diff -upr ./DIST/vdr-1.1.25/recorder.h ./recorder.h +--- ./DIST/vdr-1.1.25/recorder.h 2002-06-08 11:35:03.000000000 +0200 ++++ ./recorder.h 2003-03-07 03:50:33.000000000 +0100 +@@ -15,6 +15,7 @@ + #include "remux.h" + #include "ringbuffer.h" + #include "thread.h" ++#include "vdrttxtsubshooks.h" + + class cRecorder : public cReceiver, cThread { + private: +@@ -29,12 +30,19 @@ private: + time_t lastDiskSpaceCheck; + bool RunningLowOnDiskSpace(void); + bool NextFile(void); ++#ifdef VDRTTXTSUBSHOOKS ++ cTtxtSubsRecorderBase *ttxtSubsRecorder; ++#endif + protected: + virtual void Activate(bool On); + virtual void Receive(uchar *Data, int Length); + virtual void Action(void); + public: ++#ifdef VDRTTXTSUBSHOOKS ++ cRecorder(const char *FileName, int Ca, int Priority, int VPid, int APid1, int APid2, int DPid1, int DPid2, cTtxtSubsRecorderBase *tsr); ++#else + cRecorder(const char *FileName, int Ca, int Priority, int VPid, int APid1, int APid2, int DPid1, int DPid2); ++#endif + // Creates a new recorder that requires conditional access Ca, has + // the given Priority and will record the given PIDs into the file FileName. + virtual ~cRecorder(); diff --git a/siinfo.c b/siinfo.c new file mode 100644 index 0000000..f878be7 --- /dev/null +++ b/siinfo.c @@ -0,0 +1,583 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "linux/dvb/dmx.h" +#include "siinfo.h" + +#define DESCR_TELETEXT 0x56 +#define DESCR_DVBSUBTITLES 0x59 + + +#define PACK __attribute__ ((__packed__)) + + +// ETSI 300468 6.2.40 +struct ttxt_descr { + uint8_t tag PACK; + uint8_t length PACK; + struct { + uint8_t lang[3] PACK; + uint8_t type_mag PACK; // 5 bits type, 3 bits mag + uint8_t page_no PACK; + } d[1] PACK; +}; + +struct sect_header { + uint8_t table_id PACK; + uint16_t syntax_len PACK; + uint16_t transport_stream_id PACK; + uint8_t ver_cur PACK; + uint8_t section_number PACK; + uint8_t last_section_number PACK; +}; + +// H.222.0 2.4.4.3, Table 2-25 +struct PAT_sect { + uint8_t table_id PACK; + uint16_t syntax_len PACK; + uint16_t transport_stream_id PACK; + uint8_t vers_curr PACK; + uint8_t sect_no PACK; + uint8_t last_sect PACK; + struct { + uint16_t program_number PACK; + uint16_t res_PMTPID PACK; + } d[1] PACK; +}; + +// H.222.0 2.4.4.8, Table 2-28 +struct PMT_stream { + uint8_t stream_type PACK; + uint16_t res_PID PACK; + uint16_t res_ES_info_len PACK; + uint8_t descrs[2] PACK; +}; + +struct PMT_sect { + uint8_t table_id PACK; + uint16_t syntax_len PACK; + uint16_t program_number PACK; + uint8_t vers_curr PACK; + uint8_t sect_no PACK; + uint8_t last_sect PACK; + uint16_t res_pcr PACK; + uint16_t res_program_info_length PACK; + struct PMT_stream s PACK; +}; + + +void dump_hex(char *msg, uint8_t *p, int len) +{ + int i; + printf("%s:", msg); + for(i = 0; i < len; i++) { + printf(" %02x", p[i]); + } + printf("\n"); + + printf("%s:", msg); + for(i = 0; i < len; i++) { + printf(" %c", isprint(p[i]) ? p[i] : '.'); + } + printf("\n"); +} + + +static int SetSectFilt(int fd, uint16_t pid, uint8_t tnr, uint8_t mask) +{ + int ret; + + struct dmx_sct_filter_params p; + + memset(&p, 0, sizeof(p)); + + p.filter.filter[0] = tnr; + p.filter.mask[0] = mask; + p.pid = pid; + p.flags = DMX_IMMEDIATE_START | DMX_CHECK_CRC; + + if ((ret = ioctl(fd, DMX_SET_FILTER, &p)) < 0) + perror("DMX SET FILTER:"); + + return ret; +} + + +/* + * PID - pid to collect on + * table_id - table id to filter out (H.222.0 table 2-26) + * sects - pointer to char *[256], points to array of table sections, initially empty + * numsects - number of sections in table + * returns - 0 if everything ok + */ +#define SECTSIZE 1024 +static int CollectSections(int card_no, int pid, int table_id, char **sects, int *numsects) +{ + int fd; + int ret = -1; + int last_section = 0; + int done = 0; + char *p = NULL; + int n; + char name[100]; + + snprintf(name, sizeof(name), "/dev/dvb/adapter%d/demux0", card_no); + + memset(sects, 0, sizeof(char*) * 256); + + if((fd = open(name, O_RDWR)) < 0){ + perror("DEMUX DEVICE 1: "); + return -1; + } + + if(SetSectFilt(fd, pid, table_id, 0xff)) { + ret = -1; + goto bail; + } + + do { + struct sect_header *h; + int i; + + if(p == NULL) + p = (char *) malloc(SECTSIZE); + + n = read(fd, p, SECTSIZE); + if(n < 8) + continue; + + h = (struct sect_header *) p; + + if(n != ((ntohs(h->syntax_len) & 0xfff) + 3)) { + fprintf(stderr, "bad section length: %x / %x!\n", n, ntohs(h->syntax_len) & 0xfff); + continue; + } + + if(!(h->ver_cur & 0x01)) // if not current + continue; + + last_section = h->last_section_number; + + if(!sects[h->section_number]) { // section_number + sects[h->section_number] = p; + p = NULL; + } + + for(i = 0; i <= last_section; i++) { + if(!sects[i]) { + break; + } + + if(i == last_section) { + *numsects = last_section + 1; + ret = 0; + done = 1; + } + } + + } while (!done); + + bail: + close(fd); + return ret; +} + +static void FreeSects(char **sects) +{ + int i; + + for(i = 0; i < 256; i++) { + if(sects[i]) + free(sects[i]); + } +} + + +static void addpageinfo(struct ttxtinfo *info, uint16_t pid, struct ttxt_descr *descr, int descr_index) +{ + struct ttxtpidinfo *pd; + struct ttxtpageinfo *pa; + + if(!info->p) { + info->p = (struct ttxtpidinfo *) malloc(sizeof(*(info->p))); + memset((char *) info->p, 0, sizeof(*(info->p))); + info->p[0].pid = pid; + info->pidcount++; + } + + if(pid != info->p[info->pidcount - 1].pid) { + info->pidcount++; + info->p = (struct ttxtpidinfo *) realloc(info->p, sizeof(info->p[0]) * info->pidcount); + memset((char *) &(info->p[info->pidcount - 1]), 0, sizeof(info->p[0])); + info->p[info->pidcount - 1].pid = pid; + } + + pd = &(info->p[info->pidcount - 1]); + + pd->pagecount++; + if(!pd->i) { + pd->i = (struct ttxtpageinfo *) malloc(sizeof(pd->i[0])); + } else { + pd->i = (struct ttxtpageinfo *) realloc(pd->i, sizeof(pd->i[0]) * pd->pagecount); + } + memset((char *) &(pd->i[pd->pagecount - 1]), 0, sizeof(pd->i[0])); + + pa = &(pd->i[pd->pagecount - 1]); + + pa->lang[0] = descr->d[descr_index].lang[0]; + pa->lang[1] = descr->d[descr_index].lang[1]; + pa->lang[2] = descr->d[descr_index].lang[2]; + pa->type = descr->d[descr_index].type_mag >> 3; + pa->mag = descr->d[descr_index].type_mag & 0x7; + pa->page = descr->d[descr_index].page_no; +} + + +static int HasVPID(int vpid, char **pmtsects, int numsects) +{ + int found = 0; + int i; + + for(i = 0; i < numsects && !found; i++) { + struct PMT_sect *psect; + char *sp; + char *end; + + psect = (struct PMT_sect *) pmtsects[i]; + end = pmtsects[i] + (psect->syntax_len & 0x3ff) - 7; + // skip extra program info + sp = ((char *) &(psect->s)) + (ntohs(psect->res_program_info_length) & 0xfff); + + while(sp < end && !found) { + struct PMT_stream *s = (struct PMT_stream *) sp; + + if(s->stream_type == 1 || s->stream_type == 2) { // Video stream + if((ntohs(s->res_PID) & 0x1fff) == vpid) { + //printf("Found ttxt by vpid: %d/%d\n", s->stream_type, (ntohs(s->res_PID) & 0x1fff)); + found = 1; + break; + } + } + sp += (ntohs(s->res_ES_info_len) & 0xfff) + 5; + } + } + + return found; +} + +static void ExtractTtxtInfo(char **pmtsects, int numsects, struct ttxtinfo *info, int *foundinfo) +{ + int i; + + for(i = 0; i < numsects; i++) { + struct PMT_sect *psect; + char *sp; + char *end; + + psect = (struct PMT_sect *) pmtsects[i]; + end = pmtsects[i] + (psect->syntax_len & 0x3ff) - 7; + // skip extra program info + sp = ((char *) &(psect->s)) + (ntohs(psect->res_program_info_length) & 0xfff); + + while(sp < end) { + struct PMT_stream *s = (struct PMT_stream *) sp; + + if(s->stream_type == 6) { // PES private data + uint8_t *descr; + + for(descr = s->descrs; descr < s->descrs + (ntohs(s->res_ES_info_len) & 0xfff); descr += descr[1] + 2) { + if(descr[0] == DESCR_TELETEXT) { + struct ttxt_descr *t = (struct ttxt_descr *) descr; + int i, count = t->length / sizeof(t->d[0]); + for(i = 0; i < count; i++) { + addpageinfo(info, ntohs(s->res_PID) & 0x1fff, t, i); + //printf("%c%c%c: type %d, page: %01x%02x\n", t->d[i].lang[0], t->d[i].lang[1], t->d[i].lang[2], t->d[i].type_mag >> 3, t->d[i].type_mag & 0x7, t->d[i].page_no); + *foundinfo = 1; + } + } + } + } + sp += (ntohs(s->res_ES_info_len) & 0xfff) + 5; + } + } +} + +/* + * if vpid != 0, we first search if we can find the vpid in this PMT, + * and if so we go get the ttxt pid + * return <> 0 on error + */ +static int FindTtxtInfoInPMT(int card_no, int pid, int vpid, struct ttxtinfo *info, int *foundinfo) +{ + int ret = -1; + char *pmtsects[256]; + int numsects; + + ret = CollectSections(card_no, pid, 0x02, pmtsects, &numsects); + if(ret) + goto bail; + + if(vpid != 0) { + if(!HasVPID(vpid, pmtsects, numsects)) { + goto bail; + } + } + + ExtractTtxtInfo(pmtsects, numsects, info, foundinfo); + + bail: + FreeSects(pmtsects); + return ret; +} + + +/* + * find the ttxt_info in the PMT via the PAT, try first with the SID + * and if that fails with the VPID + * return <> 0 on error; + */ +int GetTtxtInfo(int card_no, uint16_t sid, uint16_t vpid, struct ttxtinfo *info) +{ + int ret; + char *patsects[256]; + int numsects; + int i; + int j; + uint16_t pmt_pid = 0; + int foundinfo = 0; + + memset((char *) info, 0, sizeof(*info)); + + ret = CollectSections(card_no, 0, 0, patsects, &numsects); + if(ret) + goto bail; + + if(sid != 0) { + int found; + + for(i = 0, found = 0; i < numsects && !found; i++) { + int numdescrs; + struct PAT_sect *s = (struct PAT_sect *) patsects[i]; + + numdescrs = ((ntohs(s->syntax_len) & 0x3FF) - 7) / 4; + + for(j = 0; j < numdescrs && !found; j++) { + uint16_t pno = ntohs(s->d[j].program_number); + + if(pno == 0) + continue; // network pid + + if(pno == sid) { + pmt_pid = ntohs(s->d[j].res_PMTPID) & 0x1fff; + found = 1; + } + } + } + } + + if(pmt_pid != 0) { + ret = FindTtxtInfoInPMT(card_no, pmt_pid, 0, info, &foundinfo); + } else { + // SID not found, try searching VID in all SIDS + if(vpid != 0) { + int done; + for(i = 0, done = 0; i < numsects && !done; i++) { + int numdescrs; + struct PAT_sect *s = (struct PAT_sect *) patsects[i]; + + numdescrs = ((ntohs(s->syntax_len) & 0x3FF) - 7) / 4; + + for(j = 0; j < numdescrs && !done; j++) { + uint16_t pno = ntohs(s->d[j].program_number); + + if(pno == 0) + continue; // network pid + + pmt_pid = ntohs(s->d[j].res_PMTPID) & 0x1fff; + + ret = FindTtxtInfoInPMT(card_no, pmt_pid, vpid, info, &foundinfo); + if(ret) { + done = 1; + } + if(foundinfo) + done = 1; + } + } + } + } + +bail: + FreeSects(patsects); + return ret; +} + + +void FreeTtxtInfoData(struct ttxtinfo *info) +{ + int i; + + for(i = 0; i < info->pidcount; i++) { + free((void *) info->p[i].i); + } + + free((void *) info->p); +} + + +struct ttxtpidinfo *FindSubs(struct ttxtinfo *info, char *lang, int HI, int *pid, int *pageno) +{ + struct ttxtpidinfo *foundNonHIInfo = NULL; + int foundNonHIPid = 0; + int foundNonHIPage = -1; + + for(int i = 0; i < info->pidcount; i++) { + for(int j = 0; j < info->p[i].pagecount; j++) { + if(info->p[i].i[j].lang[0] == lang[0] && + info->p[i].i[j].lang[1] == lang[1] && + info->p[i].i[j].lang[2] == lang[2]) { + if((!HI && info->p[i].i[j].type == TTXT_SUBTITLE_PAGE) || + (HI && info->p[i].i[j].type == TTXT_SUBTITLE_HEARING_IMPAIRED_PAGE)) { + *pid = info->p[i].pid; + *pageno = info->p[i].i[j].mag * 0x100 + info->p[i].i[j].page; + fprintf(stderr, "ttxtsubs: Found selected subtitles on PID %d, page %03x\n", *pid, + *pageno < 0x100 ? *pageno + 0x800 : *pageno); + return &(info->p[i]); + } else if(HI && info->p[i].i[j].type == TTXT_SUBTITLE_PAGE) { + foundNonHIPid = info->p[i].pid; + foundNonHIPage = info->p[i].i[j].mag * 0x100 + info->p[i].i[j].page; + foundNonHIInfo = &(info->p[i]); + } + } + } + } + + if(foundNonHIInfo) { + *pid = foundNonHIPid; + *pageno = foundNonHIPage; + fprintf(stderr, "ttxtsubs: Found non HI subtitles on PID %d, page %03x\n", *pid, + *pageno < 0x100 ? *pageno + 0x800 : *pageno); + return foundNonHIInfo; + } + + if(info->pidcount == 0) + fprintf(stderr, "ttxtsubs: No teletext subtitles on channel.\n"); + else { + fprintf(stderr, "ttxtsubs: Subtitles for language \"%c%c%c\" not found on channel, available languages:\n", lang[0], lang[1], lang[2]); + for(int i = 0; i < info->pidcount; i++) { + for(int j = 0; j < info->p[i].pagecount; j++) { + int page = info->p[i].i[j].mag * 0x100 + info->p[i].i[j].page; + int type = info->p[i].i[j].type; + if(page < 0x100) + page += 0x800; + fprintf(stderr, " %03x: %c%c%c %s\n", page, info->p[i].i[j].lang[0], info->p[i].i[j].lang[1], info->p[i].i[j].lang[2], + type == TTXT_INITIAL_PAGE ? "(Initial Page)" : + type == TTXT_SUBTITLE_PAGE ? "(Subtitles)" : + type == TTXT_ADDITIONAL_INFO_PAGE ? "(Additional Info Page)" : + type == TTXT_PROGRAMME_SCHEDULE_PAGE ? "(Programme Schedule Page)" : + type == TTXT_SUBTITLE_HEARING_IMPAIRED_PAGE ? "(Hearing Impaired)" : "(Unknown type)"); + } + } + } + + *pid = 0; + *pageno = -1; + return NULL; +} + + +#if 0 +int XX_GetTtxtSubtitleInfo(uint16_t pid, int card_no, struct ttxtinfo *info) +{ + int len; + char buf[4096]; + struct PMT_sect *p = (struct PMT_sect *) buf; + char *sp; + + memset((char *) info, 0, sizeof(*info)); + + len = GetSection(pid, 2, 0xFF, card_no, buf, sizeof(buf)); + + //dump_hex("Sect: ", (uint8_t *) buf, len); + + if(len < 0) + return len; + + if(len != ((ntohs(p->syntax_len) & 0xfff) + 3)) { + fprintf(stderr, "bad lengt: %x / %x!\n", len, ntohs(p->syntax_len)); + return -1; + } + + // also skip extra program info + sp = ((char *) &(p->s)) + (ntohs(p->res_program_info_length) & 0xfff); + + while(sp < buf + len - 4) { + struct PMT_stream *s = (struct PMT_stream *) sp; + + //printf("type: %d, pid: %d, len: %d\n", s->stream_type, ntohs(s->res_PID) & 0x1fff, ntohs(s->res_ES_info_len) & 0xfff); + //dump_hex("descr: ", sp, ntohs(s->res_ES_info_len) & 0xfff); + + if(s->stream_type == 6) { // PES private data + uint8_t *descr; + + for(descr = s->descrs; descr < s->descrs + (ntohs(s->res_ES_info_len) & 0xfff); descr += descr[1] + 2) { + //dump_hex("descr: ", descr, descr[1] + 2); + if(descr[0] == DESCR_TELETEXT) { + struct ttxt_descr *t = (struct ttxt_descr *) descr; + int i, count = t->length / sizeof(t->d[0]); + for(i = 0; i < count; i++) { + addpageinfo(info, ntohs(s->res_PID) & 0x1fff, t, i); + //printf("%c%c%c: type %d, page: %01x%02x\n", t->d[i].lang[0], t->d[i].lang[1], t->d[i].lang[2], t->d[i].type_mag >> 3, + //t->d[i].type_mag & 0x7, t->d[i].page_no); + } + } + } + } + + sp += (ntohs(s->res_ES_info_len) & 0xfff) + 5; + } + + return 0; +} +#endif + +#if 0 +//XXX temporary for testing! +int get_subs(char *lang, int sid, int vpid, int cardno, int *pid, int *page) { + struct ttxtinfo info; + int i, j; + int result = -1; + + GetTtxtInfo(cardno, sid, vpid, &info); + + for(i = 0; i < info.pidcount; i++) { + //printf("PID: %d ", info.p[i].pid); + for(j = 0; j < info.p[i].pagecount; j++) { + //printf(" %c%c%c: %01x%02x (%d) ", + // info.p[i].i[j].lang[0], info.p[i].i[j].lang[1], info.p[i].i[j].lang[2], + // info.p[i].i[j].mag, info.p[i].i[j].page, info.p[i].i[j].type); + if(info.p[i].i[j].lang[0] == lang[0] && info.p[i].i[j].lang[1] == lang[1] && + info.p[i].i[j].lang[2] == lang[2] && + (info.p[i].i[j].type == TTXT_SUBTITLE_PAGE || info.p[i].i[j].type == TTXT_SUBTITLE_HEARING_IMPAIRED_PAGE)) { + *pid = info.p[i].pid; + *page = info.p[i].i[j].mag * 0x100 + info.p[i].i[j].page; + result = 0; + } + } + //printf("\n"); + } + + return result; +} +#endif diff --git a/siinfo.h b/siinfo.h new file mode 100644 index 0000000..16ac445 --- /dev/null +++ b/siinfo.h @@ -0,0 +1,36 @@ + + +#define TTXT_INITIAL_PAGE 1 +#define TTXT_SUBTITLE_PAGE 2 +#define TTXT_ADDITIONAL_INFO_PAGE 3 +#define TTXT_PROGRAMME_SCHEDULE_PAGE 4 +#define TTXT_SUBTITLE_HEARING_IMPAIRED_PAGE 5 + +struct ttxtpageinfo { + char lang[3]; + uint8_t type; + uint8_t mag; + uint8_t page; +}; + +struct ttxtpidinfo { + uint16_t pid; + int pagecount; + struct ttxtpageinfo *i; +}; + +struct ttxtinfo { + int pidcount; + struct ttxtpidinfo *p; +}; + +/* + * find the ttxt_info in the PMT via the PAT, try first with the SID + * and if that fails with the VPID + * return <> 0 on error; + */ +int GetTtxtInfo(int card_no, uint16_t sid, uint16_t vpid, struct ttxtinfo *info); + +void FreeTtxtInfoData(struct ttxtinfo *info); + +struct ttxtpidinfo *FindSubs(struct ttxtinfo *info, char *lang, int HI, int *pid, int *pageno); diff --git a/teletext-chars.h b/teletext-chars.h new file mode 100644 index 0000000..1ebc10b --- /dev/null +++ b/teletext-chars.h @@ -0,0 +1,80 @@ + +/* + * Character mappings + * An attempt to map Teletext characters into ISO-8859-1. + * Trying to use similar looking or similar meaning + * characters. + */ + + +/* + * G0 and G2 national option table given Triplet 1 bits 14-11 and Control bits from C12-14 + * ETSI EN 300 706 Table 33 + */ +uint8_t laG0_nat_opts_lookup[16][8] = { + {1, 4, 11, 5, 3, 8, 0, 1}, + {7, 4, 11, 5, 3, 1, 0, 1}, + {1, 4, 11, 5, 3, 8, 12, 1}, + {1, 1, 1, 1, 1, 10, 1, 9}, + {1, 4, 2, 6, 1, 1, 0, 1}, + {1, 1, 1, 1, 1, 1, 1, 1}, // 5 - reserved + {1, 1, 1, 1, 1, 1, 12, 1}, + {1, 1, 1, 1, 1, 1, 1, 1}, // 7 - reserved + {1, 1, 1, 1, 3, 1, 1, 1}, + {1, 1, 1, 1, 1, 1, 1, 1}, // 9 - reserved + {1, 1, 1, 1, 1, 1, 1, 1}, + {1, 1, 1, 1, 1, 1, 1, 1}, // 11 - reserved + {1, 1, 1, 1, 1, 1, 1, 1}, // 12 - reserved + {1, 1, 1, 1, 1, 1, 1, 1}, // 13 - reserved + {1, 1, 1, 1, 1, 1, 1, 1}, // 14 - reserved + {1, 1, 1, 1, 1, 1, 1, 1} // 15 - reserved +}; + + +uint8_t laG0_nat_replace_map[128] = { +0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, +0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, +0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, +0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, +3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, +0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 5, 6, 7, 8, +9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, +0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 11, 12, 13, 0 +}; + + +/* + * Latin National Option Sub-Sets + * ETSI EN 300 706 Table 36 + */ + +uint8_t laG0_nat_opts[13][14] = { +{0, '#', 'u', 'c', 't', 'z', 'ý', 'í', 'r', 'é', 'á', 'e', 'ú', 's'}, // 0 - Czech/Slovak +{0, '£', '$', '@', '-', '½', '-', '|', '#', '-', '¼', '#', '¾', '÷'}, // 1 - English +{0, '#', 'õ', 'S', 'Ä', 'Ö', 'Z', 'Ü', 'Õ', 's', 'ä', 'ö', 'z', 'ü'}, // 2 - Estonian +{0, 'é', 'ï', 'à', 'ë', 'ê', 'ù', 'î', '#', 'è', 'â', 'ô', 'û', 'ç'}, // 3 - French +{0, '#', '$', '§', 'Ä', 'Ö', 'Ü', '^', '_', 'º', 'ä', 'ö', 'û', 'ß'}, // 4 - German +{0, '£', '$', 'é', 'º', 'ç', '-', '|', '#', 'ù', 'à', 'ò', 'è', 'ì'}, // 5 - Italian +{0, '#', '$', 'S', 'e', 'e', 'Z', 'c', 'u', 's', 'a', 'u', 'z', 'i'}, // 6 - Lettish/Lithuanian +{0, '#', 'n', 'a', 'Z', 'S', 'L', 'c', 'ó', 'e', 'z', 's', 'l', 'z'}, // 7 - Polish +{0, 'ç', '$', 'i', 'á', 'é', 'í', 'ó', 'ú', '¿', 'ü', 'ñ', 'è', 'à'}, // 8 - Portuguese/Spanish +{0, '#', '¤', 'T', 'Â', 'S', 'A', 'Î', 'i', 't', 'â', 's', 'a', 'î'}, // 9 - Rumanian +{0, '#', 'Ë', 'C', 'C', 'Z', 'D', 'S', 'ë', 'c', 'c', 'z', 'd', 's'}, // 10 - Serbian/Croation/Slovenian +{0, '#', '¤', 'É', 'Ä', 'Ö', 'Å', 'Ü', '_', 'é', 'ä', 'ö', 'å', 'ü'}, // 11 - Swedish/Finnish/Hungarian +{0, 'T', 'g', 'I', 'S', 'Ö', 'Ç', 'Ü', 'G', 'i', 'S', 'ö', 'ç', 'ü'} // 12 - Turkish +}; + +/* + * Latin G2 Set + * ETSI EN 300 706 Table 37 + */ +uint8_t laG2_la1_table[] = { +'?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', +'?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', '?', +' ', '¡', '¢', '£', '$', '¥', '#', '§', '¤', '´', '"', '«', '-', '|', '-', '|', +'°', '±', '²', '³', '×', 'µ', '¶', '·', '÷', '\'', '"', '»', '¼', '½', '¾', '¿', +' ', '`', '´', '^', '~', '-', '?', '·', '¨', '.', 'º', '¸', '_', '"', '?', '?', +'-', '¹', '®', '©', 'T', '?', 'C', 'p', '?', ' ', ' ', ' ', '?', '?', '?', '?', +'?', 'Æ', 'D', 'a', '?', '?', ' ', 'I', 'L', 'L', 'Ø', 'Ö', 'o', 'P', 'n', 'n', +'k', 'æ', 'd', 'd', 'h', 'i', 'i', 'l', 'l', 'ø', 'ö', 'ß', 'p', 't', 'n', '?' +}; diff --git a/teletext-tables.h b/teletext-tables.h new file mode 100644 index 0000000..b1e6a13 --- /dev/null +++ b/teletext-tables.h @@ -0,0 +1,81 @@ +/* This file is copied from Ralph Metzler's vbidecode package. */ + +/* + tables.h - some data conversion tables for vbidecode +*/ + +#ifndef _TABLES_H +#define _TABLES_H + +unsigned char unhamtab[256] = { + 0x01, 0xff, 0x81, 0x01, 0xff, 0x00, 0x01, 0xff, + 0xff, 0x02, 0x01, 0xff, 0x0a, 0xff, 0xff, 0x07, + 0xff, 0x00, 0x01, 0xff, 0x00, 0x80, 0xff, 0x00, + 0x06, 0xff, 0xff, 0x0b, 0xff, 0x00, 0x03, 0xff, + 0xff, 0x0c, 0x01, 0xff, 0x04, 0xff, 0xff, 0x07, + 0x06, 0xff, 0xff, 0x07, 0xff, 0x07, 0x07, 0x87, + 0x06, 0xff, 0xff, 0x05, 0xff, 0x00, 0x0d, 0xff, + 0x86, 0x06, 0x06, 0xff, 0x06, 0xff, 0xff, 0x07, + 0xff, 0x02, 0x01, 0xff, 0x04, 0xff, 0xff, 0x09, + 0x02, 0x82, 0xff, 0x02, 0xff, 0x02, 0x03, 0xff, + 0x08, 0xff, 0xff, 0x05, 0xff, 0x00, 0x03, 0xff, + 0xff, 0x02, 0x03, 0xff, 0x03, 0xff, 0x83, 0x03, + 0x04, 0xff, 0xff, 0x05, 0x84, 0x04, 0x04, 0xff, + 0xff, 0x02, 0x0f, 0xff, 0x04, 0xff, 0xff, 0x07, + 0xff, 0x05, 0x05, 0x85, 0x04, 0xff, 0xff, 0x05, + 0x06, 0xff, 0xff, 0x05, 0xff, 0x0e, 0x03, 0xff, + 0xff, 0x0c, 0x01, 0xff, 0x0a, 0xff, 0xff, 0x09, + 0x0a, 0xff, 0xff, 0x0b, 0x8a, 0x0a, 0x0a, 0xff, + 0x08, 0xff, 0xff, 0x0b, 0xff, 0x00, 0x0d, 0xff, + 0xff, 0x0b, 0x0b, 0x8b, 0x0a, 0xff, 0xff, 0x0b, + 0x0c, 0x8c, 0xff, 0x0c, 0xff, 0x0c, 0x0d, 0xff, + 0xff, 0x0c, 0x0f, 0xff, 0x0a, 0xff, 0xff, 0x07, + 0xff, 0x0c, 0x0d, 0xff, 0x0d, 0xff, 0x8d, 0x0d, + 0x06, 0xff, 0xff, 0x0b, 0xff, 0x0e, 0x0d, 0xff, + 0x08, 0xff, 0xff, 0x09, 0xff, 0x09, 0x09, 0x89, + 0xff, 0x02, 0x0f, 0xff, 0x0a, 0xff, 0xff, 0x09, + 0x88, 0x08, 0x08, 0xff, 0x08, 0xff, 0xff, 0x09, + 0x08, 0xff, 0xff, 0x0b, 0xff, 0x0e, 0x03, 0xff, + 0xff, 0x0c, 0x0f, 0xff, 0x04, 0xff, 0xff, 0x09, + 0x0f, 0xff, 0x8f, 0x0f, 0xff, 0x0e, 0x0f, 0xff, + 0x08, 0xff, 0xff, 0x05, 0xff, 0x0e, 0x0d, 0xff, + 0xff, 0x0e, 0x0f, 0xff, 0x0e, 0x8e, 0xff, 0x0e, +}; + +// invert tab for last 42 bytes of data in packets +unsigned char invtab[256] = { + 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, + 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, + 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, + 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, + 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, + 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, + 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, + 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, + 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, + 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, + 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, + 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, + 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, + 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, + 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, + 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, + 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, + 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, + 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, + 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, + 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, + 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, + 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, + 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, + 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, + 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, + 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, + 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, + 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, + 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, + 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, + 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff, +}; + +#endif diff --git a/teletext.c b/teletext.c new file mode 100644 index 0000000..13ea178 --- /dev/null +++ b/teletext.c @@ -0,0 +1,724 @@ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +//#include +//#include + +#include "teletext.h" +#include "teletext-tables.h" +#include "teletext-chars.h" +#include "utils.h" + + +// FROM vbidecode +// unham 2 bytes into 1, report 2 bit errors but ignore them +unsigned char unham(unsigned char a,unsigned char b) +{ + unsigned char c1,c2; + + c1=unhamtab[a]; + c2=unhamtab[b]; +// if ((c1|c2)&0x40) +// fprintf(stderr,"bad ham!"); + return (c2<<4)|(0x0f&c1); +} + + +// ham 8/4 the byte in into two bytes pointed to by out +// should make a table instead +void ham8_4byte(uint8_t in, uint8_t *out) +{ + out[0] = ham8_4nibble(in & 0xF); + out[1] = ham8_4nibble(in >> 4); + + if (1) { // XXX debug + int a; + if(unham(out[0], out[1]) != in) { + fprintf(stderr, "ham8_4: 1 - result not correct %02x -> %02x %02x!\n", in, out[0], out[1]); + } + a = unhamtab[out[0]]; + a ^= 0x80; + if(a & 0xf0 || (a != (in & 0xF))) { + fprintf(stderr, "ham8_4: 2 - result not correct %02x -> %02x %02x, %02x!\n", in, out[0], out[1], a); + } + a = unhamtab[out[1]]; + a ^= 0x80; + if(a & 0xf0 || (a != (in >> 4))) { + fprintf(stderr, "ham8_4: 3 - result not correct %02x -> %02x %02x, %02x!\n", in, out[0], out[1], a); + } + } +} + +// should be a table instead +int parity(uint8_t x) { + int res = 1; + int count = x & 0xf0 ? 8 : 4; + + while(count--) { + if(x & 0x01) + res = !res; + x >>= 1; + } + + return res; +} + +// ham 8/4 the nibble in into the byte pointed to by out +// should make a table instead +// D4 P4 D3 P3 D2 P2 D1 P1 +// P4 = all the rest +uint8_t ham8_4nibble(uint8_t in) +{ + uint8_t o = 0; + + // insert the data bits + o |= (in << 4) & 0x80; + o |= (in << 3) & 0x20; + o |= (in << 2) & 0x08; + o |= (in << 1) & 0x02; + + if(parity(in & 0x0d)) // P1 = 1 . D1 . D3 . D4 + o |= 0x01; + if(parity(in & 0x0b)) // P2 = 1 . D1 . D2 . D4 + o |= 0x04; + if(parity(in & 0x07)) // P3 = 1 . D1 . D2 . D3 + o |= 0x10; + if(parity(o & 0xbf)) // P4 = 1 . P1 . D1 . ... . D3 . D4 + o |= 0x40; + + return o; +} + + +/* + * Map Latin G0 teletext characters into a ISO-8859-1 approximation. + * Trying to use similar looking or similar meaning characters. + * Gtriplet - 4 bits = triplet-1 bits 14-11 (14-8) of a X/28 or M/29 packet, if unknown - use 0 + * natopts - 3 bits = national_options field of a Y/0 packet (or triplet-1 bits 10-8 as above?) + * inchar - 7 bits = characted to remap + * Also strips parity + */ + +uint8_t ttxt_laG0_la1_char(int Gtriplet, int natopts, uint8_t inchar) +{ + int no = laG0_nat_opts_lookup[Gtriplet & 0xf][natopts & 0x7]; + uint8_t c = inchar & 0x7f; + + //dprint("\n%x/%c/%x/%x\n", c, c, laG0_nat_replace_map[c], laG0_nat_opts[no][laG0_nat_replace_map[c]]); + + if(!laG0_nat_replace_map[c]) + return c; + else + return laG0_nat_opts[no][laG0_nat_replace_map[c]]; +} + +/* + * Map Latin G2 teletext characters into a ISO-8859-1 approximation. + * Trying to use similar looking or similar meaning characters. + */ +uint8_t ttxt_laG2_la1_char(uint8_t inchar) +{ + return laG2_la1_table[inchar & 0x7f]; +} + +void dump_hex(char *msg, const uint8_t *p, int len) +{ + int i; + printf("%s:", msg); + for(i = 0; i < len; i++) { + printf(" %02x", p[i]); + } + printf("\n"); +} + + +void +print_code(uint8_t c, int natopts) +{ + if(c >= 0x20) { + dprint("%c", ttxt_laG0_la1_char(0, natopts, c)); + } else + switch(c) { + case 0x0: + case 0x1: + case 0x2: + case 0x3: + case 0x4: + case 0x5: + case 0x6: + case 0x7: + dprint("", c); + break; + case 0x08: + dprint(""); + break; + case 0x09: + dprint(""); + break; + case 0x0a: + dprint("]"); + break; + case 0x0b: + dprint("["); + break; + case 0x0c: + dprint(""); + break; + case 0x0d: + dprint(""); + break; + case 0x0e: + dprint(""); + break; + case 0x0f: + dprint(""); + break; + case 0x10: + case 0x11: + case 0x12: + case 0x13: + case 0x14: + case 0x15: + case 0x16: + case 0x17: + dprint("", c-0x10); + break; + case 0x18: + dprint(""); + break; + case 0x19: + dprint(""); + break; + case 0x1a: + dprint(""); + break; + case 0x1b: + dprint(""); + break; + case 0x1c: + dprint(""); + break; + case 0x1d: + dprint(""); + break; + case 0x1e: + dprint(""); + break; + case 0x1f: + dprint(""); + break; + default: + dprint("", c); + } +} + +void +print_page(struct ttxt_page *p) +{ + int r, c, e; + + dprint("\n\n%03x %s%s%s%s%snatchars: %d\n", + (p->mag << 8) + p->no, + p->flags & erasepage ? "erasepage, " : "", + p->flags & newsflash ? "Newsflash, " : "", + p->flags & subtitle ? "Subtitle, " : "", + p->flags & suppress_header ? "SuppressHeader, " : "", + p->flags & inhibit_display ? "InihinitDisplay, " : "", + p->national_charset); + + for(r = 0; r < 26; r++) { + int do_display = 0; + + for(e = 39; e > 0; e--) { + if(p->data[r][e]) { + do_display = 1; + break; + } + } + + if(do_display) { + dprint("%02d ", r); + for(c = 0; c <= e; c++) { + char z = p->data[r][c] & 0x7f; + print_code(z, p->national_charset); + //dprint("%c", isprint(z) ? z : z == 0 ? '\'' : '.'); + } + dprint("\n"); + } + } +} + + +void print_line(char *p) +{ + int mp; + int mag; // X in ETSI EN 300 706 + int packet; // Y + struct ttxt_data_field *d = (struct ttxt_data_field *) p; + + mp = unham(invtab[d->mag_addr_ham[0]], invtab[d->mag_addr_ham[1]]); + mag = mp & 0x7; + packet = (mp >> 3) & 0x1f; + + dprint("I%d Y%02d M%d ", d->data_unit_id, packet, mag); + + // packet 0, change page no in this magazine + if(packet == 0) { + int no; + uint8_t buf[8]; + + for(int i = 0; i < 8; i++) + buf[i] = invtab[d->data[i]]; + + no = unham(buf[0], buf[1]); + + dprint("P%02x ", no); + + dprint("<"); + for(int i = 8; i < 40; i++) + print_code(invtab[d->data[i]] & 0x7f, 0); + dprint(">"); + + if(buf[3] & 0x80) dprint(", erase page"); + if(buf[5] & 0x20) dprint(", newsflash"); + if(buf[5] & 0x80) dprint(", subtitle"); + if(buf[6] & 0x02) dprint(", suppress header"); + if(buf[6] & 0x08) dprint(", update indicator"); + if(buf[6] & 0x20) dprint(", interrupted sequence"); + if(buf[6] & 0x80) dprint(", inhibit display"); + if(buf[7] & 0x02) dprint(", magazine serial"); + + dprint(", charset=%d", ((buf[7] & 0x80) >> 5) + ((buf[7] & 0x20) >> 4) + ((buf[7] & 0x08) >> 3)); + } else { + dprint("<"); + for(int i = 0; i < 40; i++) + print_code(invtab[d->data[i]] & 0x7f, 0); + dprint(">"); + } + + dprint("\n"); +} + + +#if 0 +void +show_page(struct ttxt_page *p) +{ + static cOsdBase *o = NULL; + static tWindowHandle w1 = 0; + static tWindowHandle w2 = 0; + static int open1 = 0, open2 = 0; + char *s1 = NULL, *s2 = NULL; + int i, j; + + for(i = 1; i < TTXT_ROWS; i++) { + char *s = NULL; + if(p->data[i][0]) { + int do_incr = 0; + dprint("Checking row %d\n", i); + for(j = 0; j < 40; j++) { + p->data[i][j] = p->data[i][j] & 0x7f; + switch(p->data[i][j]) { + case 0x0d: // double height + case 0x0f: // double size + do_incr = 1; + break; + case 0x0a: // box end + p->data[i][j] = '\0'; + break; + case 0x0b: // box begin + s = (char *) &(p->data[i][j+1]); + dprint("Using row %d\n", i); + break; + case '[': + p->data[i][j] = 'Ä'; + break; + case ']': + p->data[i][j] = 'Å'; + break; + case '\\': + p->data[i][j] = 'Ö'; + break; + case '{': + p->data[i][j] = 'ä'; + break; + case '}': + p->data[i][j] = 'å'; + break; + case '|': + p->data[i][j] = 'ö'; + break; + } + } + if(do_incr) + i++; + dprint("\n"); + } + + if(s) + if(!s1) + s1 = s; + else if(!s2) + s2 = s; + } + + if(s1 && !s2) { + s2 = s1; + s1 = NULL; + } + + if(s1) + dprint("S1: %s\n", s1); + else + dprint("S1: \n"); + if(s2) + dprint("S2: %s\n", s2); + else + dprint("S2: \n"); + + if(o != NULL) { + if(open1) { + o->Clear(w1); + open1 = 0; + } + if(open2) { + o->Clear(w2); + open2 = 0; + } + + o->Clear(); + delete o; + o = NULL; + } + + if(!s1 && !s2) + return; + + o = cOsd::OpenRaw(125, 450); + + if(o == NULL) + return; + + o->SetFont(fontOsd); + + if(s1) { + int w = o->Width((char *) s1); + dprint("w1: %d\n", w); + w = 450; + int h = 36; + w1 = o->Create(0, 0, w, h, 2); +#if 0 + o->AddColor(clrBackground, w1); + o->AddColor(clrWhite, w1); +#endif + o->Fill(0, 0, w, h, clrBackground, w1); + o->Text(15, 4, (char *) s1, clrWhite, clrBackground, w1); + open1 = 1; + } + + if(s2) { + int w = o->Width((char *) s2); + dprint("w2: %d\n", w); + w = 452; + int h = 36; + w2 = o->Create(0, 45, w, h, 2); +#if 0 + o->AddColor(clrBackground, w2); + o->AddColor(clrWhite, w2); +#endif + o->Fill(0, 45, w, 45 + h, clrBackground, w2); + o->Text(15, 45 + 4, (char *) s2, clrWhite, clrBackground, w2); + open2 = 1; + } + + o->Flush(); +} +#endif + +#if 0 +void +ttxt_packet_in(int data_unit_id, int mag, int pack, uint8_t *data) +{ + static int valid = 0; + static struct ttxt_page p; + int i; + + if(pack == 0) { + if(valid) + if(p.mag == TTXT_MAG && p.no == TTXT_PAGE) + if(p.subtitle) + //print_page(&p); + /* if(p.mag == 1) */{ + show_page(&p); + print_page(&p); + } + + memset(&p, 0, sizeof(p)); + p.data_unit_id = data_unit_id; + p.mag = mag; + p.no = unham(data[0], data[1]); + + if(data[3] & 0x80) { // Erase Page + memset(p.data, 0, sizeof(p.data)); + p.erasepage = 1; + } + if(data[5] & 0x20) // Newsflash + p.newsflash = 1; + if(data[5] & 0x80) // Subtitle + p.subtitle = 1; + if(data[6] & 0x02) // Suppress Header + p.suppress_header = 1; + //if(data[6] & 0x08) // Update Indicator + //if(data[6] & 0x20) // Interrupted Sequence + if(data[6] & 0x80) // Inhibit Display + p.inhibit_display = 1; + //if(data[7] & 0x02) // Magazine Serial + + p.national_charset = + ((data[7] & 0x80) >> 5) + ((data[7] & 0x20) >> 4) + ((data[7] & 0x08) >> 3); + + valid = 1; + + for(i = 0; i < 32; i++) + p.data[0][i] = data[i+8]; + } else if(pack < 26) { + for(i = 0; i < 42; i++) + p.data[pack][i] = data[i]; + } else { + if((valid && p.mag == TTXT_MAG && p.no == TTXT_PAGE) || + pack == 28) + dprint("mag: %d, pack: %d, page: %02x\n", p.mag, pack, p.no); + } +} +#endif + +#if 0 +void +ttxt_pes_data_in(struct ttxt_pes_data_field *t, int len) +{ + int i; + + if(len < 1) + return; + + if(t->data_identifier < 0x10 || t->data_identifier > 0x1F) { + dprint("Unknown data identifier: %02x\n", t->data_identifier); + return; + } + + for(i = 0; (uint8_t *) (&(t->d[i+1])) < (((uint8_t *) t) + len); i++) { + struct ttxt_data_field *d = &(t->d[i]); + int i; + uint8_t *p; + int uh; + int mag; + int pack; + + // if(d->data_unit_id != ttxt_subtitle) + // continue; + + p = (uint8_t *) &(d->mag_addr_ham); + for(i = 0; i < 42; i++) { + p[i] = invtab[p[i]]; + } + + uh = unham(d->mag_addr_ham[0], d->mag_addr_ham[1]); + mag = uh & 0x7; + pack = (uh >> 3) & 0x1f; + + // dump_hex("line", (uint8_t *) d, 20); + // dprint("id: %d, line: %d, mag %d, pack: %d\n", d->data_unit_id, TTXT_LINE_NO(*d), mag, pack); + + ttxt_packet_in(d->data_unit_id, mag, pack, d->data); + } +} + + +void +set_filt(int fd,uint16_t tt_pid, dmx_pes_type_t t) +{ + struct dmx_pes_filter_params pesFilterParams; + + memset(&pesFilterParams, 0, sizeof(pesFilterParams)); + + pesFilterParams.pid = tt_pid; + pesFilterParams.input = DMX_IN_FRONTEND; + pesFilterParams.output = DMX_OUT_TAP; + pesFilterParams.pes_type = t; + pesFilterParams.flags = DMX_IMMEDIATE_START; + + if (ioctl(fd, DMX_SET_PES_FILTER, &pesFilterParams) < 0) + perror("DMX SET PES FILTER:"); + + // XXX set buffer size too? +} +#endif + +#if 0 +#define BUFSIZE 2000 + +// external entry point +void ttxt_decode(int fd, int tpid, int *doRun) +{ + uint8_t buf[BUFSIZE]; + int n; + int hunt = 1; + + set_filt(fd, tpid, DMX_PES_OTHER); + + while (*doRun) { + restart: + if(hunt) { + int i; + + dprint("hunting...\n"); + n = read(fd, buf, 199); + if(n < 0) { + perror("ttxt_decode:read: "); + goto restart; + } + + for(i = 0; i < (n - 3); i++) { + if(buf[i] == 0 && buf[i+1] == 0 && buf[i+2] == 1 && buf[i+3] == 0xbd) { + struct ttxt_pes_header *p = (struct ttxt_pes_header *) (buf + i); + size_t skip = ntohs(p->len) + 6 - (n - i); + + if(skip > 0) { + read(fd, buf, skip < sizeof(buf) ? skip : sizeof(buf)); + if(n < 0) { + perror("ttxt_decode:read: "); + goto restart; + } + hunt = 0; + break; + } + } + } + } else { + struct ttxt_pes_header *p = (struct ttxt_pes_header *) buf; + + n = read(fd, buf, 6); + if(n < 0) { + perror("ttxt_decode:read: "); + goto restart; + } + + if(p->start[0] != 0 || p->start[1] != 0 || p->start[2] != 1 || + p->stream_id != 0xbd || // private_stream_1 + ntohs(p->len) > (sizeof(buf) - 6)) { + dprint("Lost PES packet sync, hunting...\n"); + hunt = 1; + continue; + } + + n = read(fd, buf + 6, ntohs(p->len)); + if(n < 0) { + perror("ttxt_decode:read: "); + goto restart; + } + + // dprint("len: %d\n", n); + + if(n != ntohs(p->len) || + p->header_len != 0x24) { // header should allways be 0x24 long (EN 300 472) + dprint("Error reading PES packet, hunting...\n"); + hunt = 1; + continue; + } + + ttxt_pes_data_in((struct ttxt_pes_data_field *) (buf + 45), n + 6 - 45); + } + + // fwrite(buf,1,n,stdout); + } + + dprint("ttxt_decode DONE!\n"); +} +#endif + + +#if 0 +int +main(int argc, char **argv) +{ + int fd; + int pid; + uint8_t buf[BUFSIZE]; + int n; + int hunt = 1; + + if (argc!=2) { + fprintf(stderr,"USAGE: %s PID\n", argv[0]); + return -1; + } + + pid = atoi(argv[1]); + + if((fd = open("/dev/dvb/adapter0/demux0", O_RDWR)) < 0){ + perror("Error opening demux device: "); + return -1; + } + + set_filt(fd, pid, DMX_PES_OTHER); + + for (;;) { + if(hunt) { + int i; + + dprint("hunting...\n"); + n = read(fd, buf, 199); + + for(i = 0; i < (n - 3); i++) { + if(buf[i] == 0 && buf[i+1] == 0 && buf[i+2] == 1 && buf[i+3] == 0xbd) { + struct ttxt_pes_header *p = (struct ttxt_pes_header *) (buf + i); + int skip = ntohs(p->len) + 6 - (n - i); + + if(skip > 0) { + read(fd, buf, skip < sizeof(buf) ? skip : sizeof(buf)); + hunt = 0; + break; + } + } + } + } else { + struct ttxt_pes_header *p = (struct ttxt_pes_header *) buf; + + n = read(fd, buf, 6); + + if(p->start[0] != 0 || p->start[1] != 0 || p->start[2] != 1 || + p->stream_id != 0xbd || // private_stream_1 + ntohs(p->len) > (sizeof(buf) - 6)) { + dprint("Lost PES packet sync, hunting...\n"); + hunt = 1; + continue; + } + + n = read(fd, buf + 6, ntohs(p->len)); + + // dprint("len: %d\n", n); + + if(n != ntohs(p->len) || + p->header_len != 0x24) { // header should allways be 0x24 long (EN 300 472) + dprint("Error reading PES packet, hunting...\n"); + hunt = 1; + continue; + } + + ttxt_pes_data_in((struct ttxt_pes_data_field *) (buf + 45), n + 6 - 45); + } + + // fwrite(buf,1,n,stdout); + } + + return 0; +} +#endif diff --git a/teletext.h b/teletext.h new file mode 100644 index 0000000..fa1b519 --- /dev/null +++ b/teletext.h @@ -0,0 +1,101 @@ + +#ifndef __TS_TELETEXT_H +#define __TS_TELETEXT_H + + +#define PACK __attribute__ ((__packed__)) + +struct ttxt_pes_header { + uint8_t start[3]; + uint8_t stream_id PACK; + uint16_t len PACK; + + // private_stream_1 packets (and others) + uint8_t flags[2] PACK; + uint8_t header_len PACK; +}; + + +enum { + ttxt_non_subtitle = 2, + ttxt_subtitle = 3, + ttxt_stuff = 0xff +}; + +#define TTXT_LINE_NO(x) ((x).par_loff & 0x1f) +struct ttxt_data_field { + uint8_t data_unit_id PACK; + uint8_t data_unit_length PACK; + uint8_t par_loff PACK; + uint8_t framing_code PACK; + uint8_t mag_addr_ham[2] PACK; + uint8_t data[40] PACK; +}; + + +struct ttxt_pes_data_field { + uint8_t data_identifier PACK; + struct ttxt_data_field d[1] PACK; +}; + + +// Really 25 + row 0 +#define TTXT_DISPLAYABLE_ROWS 26 + +enum pageflags { + erasepage = 0x01, + newsflash = 0x02, + subtitle = 0x04, + suppress_header = 0x08, + inhibit_display = 0x10 // rows 1 - 24 are not to be displayed +}; + +struct ttxt_page { + uint8_t mag; + uint8_t no; + uint8_t flags; + uint8_t national_charset; + uint8_t data[TTXT_DISPLAYABLE_ROWS][40]; +}; + +// FROM vbidecode +// unham 2 bytes into 1, report 2 bit errors but ignore them +unsigned char unham(unsigned char a,unsigned char b); + +#define UNHAM_INV(a, b) unham(invtab[a], invtab[b]) + +// ham 8/4 the byte in into two bytes pointed to by out +void ham8_4byte(uint8_t in, uint8_t *out); +// ham 8/4 the nibble in into the byte pointed to by out +uint8_t ham8_4nibble(uint8_t in); + +// odd parity status for last 7 bits of byte +int parity(uint8_t x); + +/* + * Map Latin G0 teletext characters into a ISO-8859-1 approximation. + * Trying to use similar looking or similar meaning characters. + * Gtriplet - 4 bits = triplet-1 bits 14-11 (14-8) of a X/28 or M/29 packet, if unknown - use 0 + * natopts - 3 bits = national_options field of a Y/0 packet (or triplet-1 bits 10-8 as above?) + * inchar - 7 bits = characted to remap + * Also strips parity + */ +uint8_t ttxt_laG0_la1_char(int Gtriplet, int natopts, uint8_t inchar); + +/* + * Map Latin G2 teletext characters into a ISO-8859-1 approximation. + * Trying to use similar looking or similar meaning characters. + */ +uint8_t ttxt_laG2_la1_char(uint8_t inchar); + + + +// debug stuff +void print_page(struct ttxt_page *p); +void print_line(char *p); +void dump_hex(char *msg, const uint8_t *p, int len); + +// invert tab for last 42 bytes in packets +extern unsigned char invtab[256]; + +#endif __TS_TELETEXT_H diff --git a/ttxtsubs.c b/ttxtsubs.c new file mode 100644 index 0000000..da9c2f1 --- /dev/null +++ b/ttxtsubs.c @@ -0,0 +1,357 @@ +/* + * ttxtsubs.c: A plugin for the Video Disk Recorder + * + * See the README file for copyright information and how to reach the author. + * + * $Id: ttxtsubs.c,v 1.11 2003/03/07 05:52:58 ragge Exp $ + */ + +#include +#include +#include +#include +#include + +#include "ttxtsubsdisplayer.h" +#include "ttxtsubsrecorder.h" +#include "utils.h" +#include "siinfo.h" +#include "ttxtsubs.h" + +static const char *VERSION = "0.0.1"; +static const char *DESCRIPTION = "Teletext subtitles"; +//static const char *MAINMENUENTRY = "Ttxtsubs"; + +// ISO 639-2 language codes in VDR order +// XXX should be replaced by something that allows for other languages and for real language names! +// +char *gLanguages[] = +{ "eng", //English + "deu", //Deutsch + "slv", //Slovenian + "ita", //Italian + "dut", //"nld"? Dutch + "por", //Portuguese + "fre", //"fra"? French + "nor", //Norwegian + "fin", //Finnish + "pol", //Polish + "spa", //Spanish + "gre", //Greek + "swe", //Swedish + "rom", //Romanian + "hun", //Hungarian + // Not in translations! + "dan" //Danish + }; +int gNumLanguages = sizeof(gLanguages) / sizeof(gLanguages[0]); + +class cPluginTtxtsubs : public cPlugin, public cStatus, public cVDRTtxtsubsHookListener { +public: + cPluginTtxtsubs(void); + virtual ~cPluginTtxtsubs(); + + // -- cPlugin + virtual const char *Version(void) { return VERSION; } + virtual const char *Description(void) { return DESCRIPTION; } + virtual const char *CommandLineHelp(void); + virtual bool ProcessArgs(int argc, char *argv[]); + virtual bool Start(void); + virtual void Housekeeping(void); + //virtual const char *MainMenuEntry(void) { return MAINMENUENTRY; } + virtual cOsdObject *MainMenuAction(void); + virtual cMenuSetupPage *SetupMenu(void); + virtual bool SetupParse(const char *Name, const char *Value); + + // -- Setup stuff + virtual char *Language(void) { return mLanguage; }; + virtual int HearingImpaired(void) { return mHearingImpaired; }; + virtual int Record(void) { return mRecord; }; + + virtual void SetLanguage(char *lang) { strncpy(mLanguage, lang, 4); mLanguage[3] = '\0'; }; + virtual void SetHearingImpaired(int hi) { mHearingImpaired = hi; }; + virtual void SetRecord(int record) { mRecord = record; }; + + // -- cStatus + protected: + virtual void ChannelSwitch(const cDevice *Device, int ChannelNumber); + virtual void Replaying(const cControl *Control, const char *Name); + // The given player control has started replaying Name. Name is the name of the + // recording, without any directory path. In case of a player that can't provide + // a name, Name can be a string that identifies the player type (like, e.g., "DVD"). + // If Name is NULL, the replay has ended. + // virtual void OsdClear(void) { ShowTtxt(); } + // virtual void OsdTitle(const char *Title) { HideTtxt(); } + // virtual void OsdStatusMessage(const char *Message) { HideTtxt(); } + // virtual void OsdHelpKeys(const char *Red, const char *Green, const char *Yellow, const char *Blue) { HideTtxt(); } + // virtual void OsdCurrentItem(const char *Text) { HideTtxt(); } + // virtual void OsdTextItem(const char *Text, bool Scroll) { HideTtxt(); } + // virtual void OsdChannel(const char *Text) { HideTtxt(); } + // virtual void OsdProgramme(time_t PresentTime, const char *PresentTitle, const char *PresentSubtitle, time_t FollowingTime, const char *FollowingTitle, const char *FollowingSubtitle) { HideTtxt(); } + + // -- cVDRTtxtsubsHookListener + virtual void HideOSD(void) { HideTtxt(); } + virtual void ShowOSD(void) { ShowTtxt(); } + virtual void PlayerTeletextData(uint8_t *p, int length); + virtual cTtxtSubsRecorderBase *NewTtxtSubsRecorder(cDevice *dev, const cChannel *ch); + + // -- internal + private: + void StartTtxtLive(const cDevice *Device, int pid, int page); + void StartTtxtPlay(int page); + void StopTtxt(void); + void ShowTtxt(void); + void HideTtxt(void); + +private: + // Add any member variables or functions you may need here. + cTtxtSubsDisplayer *mRec; + + // Setup items + char mLanguage[4]; + int mHearingImpaired; + int mRecord; + + // ugly hack for now + int mPage; +}; + +class cMenuSetupTtxtsubs : public cMenuSetupPage { + public: + cMenuSetupTtxtsubs(cPluginTtxtsubs *ttxtsubs); + protected: + virtual void Store(void); + private: + cPluginTtxtsubs *mTtxtsubs; + char mLanguage[4]; + int mLanguageNo; + int mHearingImpaired; + int mRecord; +}; + + +cPluginTtxtsubs::cPluginTtxtsubs(void) + : + mRec(NULL), + mHearingImpaired(0), + mRecord(1), + mPage(0x199) +{ + // Initialize any member variables here. + // DON'T DO ANYTHING ELSE THAT MAY HAVE SIDE EFFECTS, REQUIRE GLOBAL + // VDR OBJECTS TO EXIST OR PRODUCE ANY OUTPUT! + + strncpy(mLanguage, "unk", 4); +} + +cPluginTtxtsubs::~cPluginTtxtsubs() +{ + // Clean up after yourself! +} + +const char *cPluginTtxtsubs::CommandLineHelp(void) +{ + // Return a string that describes all known command line options. + return NULL; +} + +bool cPluginTtxtsubs::ProcessArgs(int argc, char *argv[]) +{ + // Implement command line argument processing here if applicable. + return true; +} + +bool cPluginTtxtsubs::Start(void) +{ + // Start any background activities the plugin shall perform. + + if(!memcmp(mLanguage, "unk", 3)) { + int n = Setup.OSDLanguage; + if(n > gNumLanguages) { + strncpy(mLanguage, "eng", 4); + } else { + strncpy(mLanguage, gLanguages[n], 4); + mLanguage[3] = '\0'; + } + } + + //dprint("cPluginTtxtsubs::Start\n"); + + HookAttach(); + + return true; +} + +void cPluginTtxtsubs::Housekeeping(void) +{ + // Perform any cleanup or other regular tasks. +} + +cOsdObject *cPluginTtxtsubs::MainMenuAction(void) +{ + // Perform the action when selected from the main VDR menu. + return NULL; +} + +cMenuSetupPage *cPluginTtxtsubs::SetupMenu(void) +{ + return new cMenuSetupTtxtsubs(this); +} + +bool cPluginTtxtsubs::SetupParse(const char *Name, const char *Value) +{ + if(!strcasecmp(Name, "Language")) { strncpy(mLanguage, Value, 4); mLanguage[3] = '\0'; } + else if(!strcasecmp(Name, "HearingImpaired")) mHearingImpaired = atoi(Value); + else if(!strcasecmp(Name, "Record")) mRecord = atoi(Value); + else + return false; + return true; +} + +void cPluginTtxtsubs::ChannelSwitch(const cDevice *Device, int ChannelNumber) +{ + if(ChannelNumber) { + cChannel *c = Channels.GetByNumber(ChannelNumber); + if(c) { + struct ttxtinfo info; + int pid, page; + + if(GetTtxtInfo(Device->DeviceNumber(), c->Sid(), c->Vpid(), &info)) { + fprintf(stderr, "ttxtsubs: Error: GetTtxtInfo failed!\n"); + } else { + if(FindSubs(&info, mLanguage, mHearingImpaired, &pid, &page)) { + //fprintf(stderr, "CHANNELSWITCH, pid: %d page: %x\n", pid, page); + mPage = page; // XXX remember this for playback (temporary hack)! + StartTtxtLive(Device, pid, page); + } + FreeTtxtInfoData(&info); + } + } + } else + StopTtxt(); +} + +void cPluginTtxtsubs::Replaying(const cControl *Control, const char *Name) +{ + StopTtxt(); + StartTtxtPlay(mPage); // XXX should get page in some other way! +} + +void cPluginTtxtsubs::PlayerTeletextData(uint8_t *p, int length) +{ + cTtxtSubsPlayer *r = dynamic_cast(mRec); + + if(!r) { + fprintf(stderr, "ttxtsubs: ERROR: not a cTtxtSubsPlayer!\n"); + return; + } + + r->PES_data(p, length); +} + +cTtxtSubsRecorderBase *cPluginTtxtsubs::NewTtxtSubsRecorder(cDevice *dev, const cChannel *ch) +{ + if(mRecord) + return new cTtxtSubsRecorder(dev, ch, mLanguage, mHearingImpaired); + else + return NULL; +} + + +// -- internal + +void cPluginTtxtsubs::StartTtxtLive(const cDevice *Device, int pid, int page) +{ + //dprint("cPluginTtxtsubs::StartTtxtLive\n"); + + if(!mRec) { + cTtxtSubsLiveReceiver *r; + //dprint("teletext subtitles started on pid %d\n", pid); + mRec = r = new cTtxtSubsLiveReceiver(pid, page); + if(!cDevice::PrimaryDevice()->AttachReceiver(r)) + fprintf(stderr, "ttxtsubs: Error: AttachReceiver failed!\n"); // + } else + fprintf(stderr, "ttxtsubs: Error: StartTtxtLive called when already started!\n"); +} + +void cPluginTtxtsubs::StartTtxtPlay(int backup_page) +{ + //dprint("cPluginTtxtsubs::StartTtxtPlay\n"); + + if(!mRec) { + dprint("ttxtsubs: teletext subtitles replayer started with initial page %03x\n", backup_page); + mRec = new cTtxtSubsPlayer(mLanguage, mHearingImpaired, backup_page); + } else + fprintf(stderr, "ttxtsubs: Error: StartTtxtPlay called when already started!\n"); +} + +void cPluginTtxtsubs::StopTtxt(void) +{ + //dprint("cPluginTtxtsubs::StopTtxt\n"); + + if(mRec) { + HideTtxt(); + delete mRec; + mRec = NULL; + } +} + +void cPluginTtxtsubs::ShowTtxt(void) +{ + if(mRec) + mRec->ShowDisplay(); +} + +void cPluginTtxtsubs::HideTtxt(void) +{ + if(mRec) + mRec->HideDisplay(); +} + +// ----- cMenuSetupTtxtsubs ----- + +cMenuSetupTtxtsubs::cMenuSetupTtxtsubs(cPluginTtxtsubs *ttxtsubs) + : + mTtxtsubs(ttxtsubs), + mLanguageNo(-1), + mHearingImpaired(mTtxtsubs->HearingImpaired()), + mRecord(mTtxtsubs->Record()) +{ + memcpy(mLanguage, ttxtsubs->Language(), 3); + mLanguage[3] = '\0'; + + for(int i = 0; i < gNumLanguages; i++) { + if(!memcmp(mLanguage, gLanguages[i], 3)) { + mLanguageNo = i; + break; + } + } + + if(mLanguageNo >= 0) + Add(new cMenuEditStraItem(tr("Language"), &mLanguageNo, gNumLanguages, gLanguages)); + else + Add(new cMenuEditStrItem(tr("Language"), mLanguage, 4, "abcdefghijklmnopqrstuvwxyz")); + + Add(new cMenuEditBoolItem(tr("Hearing Impaired"), &mHearingImpaired, tr("no"), tr("yes"))); + Add(new cMenuEditBoolItem(tr("Record Subtitles"), &mRecord, tr("no"), tr("yes"))); +} + +void cMenuSetupTtxtsubs::Store(void) +{ + if(mLanguageNo >= 0) { + SetupStore("Language", gLanguages[mLanguageNo]); + mTtxtsubs->SetLanguage(gLanguages[mLanguageNo]); + } else { + SetupStore("Language", mLanguage); + mTtxtsubs->SetLanguage(mLanguage); + } + + SetupStore("HearingImpaired", mHearingImpaired); + mTtxtsubs->SetHearingImpaired(mHearingImpaired); + + SetupStore("Record", mRecord); + mTtxtsubs->SetRecord(mRecord); +} + + +VDRPLUGINCREATOR(cPluginTtxtsubs); // Don't touch this! diff --git a/ttxtsubs.h b/ttxtsubs.h new file mode 100644 index 0000000..8b13789 --- /dev/null +++ b/ttxtsubs.h @@ -0,0 +1 @@ + diff --git a/ttxtsubsdisplay.c b/ttxtsubsdisplay.c new file mode 100644 index 0000000..370b4c9 --- /dev/null +++ b/ttxtsubsdisplay.c @@ -0,0 +1,331 @@ + +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "ttxtsubsdisplay.h" +#include "utils.h" + +// pageState +enum { + invalid = 0, + collecting, + interimshow, + finished +}; + + +cTtxtSubsDisplay::cTtxtSubsDisplay(void) + : + mPageState(invalid), + mMag(0), + mNo(0), + mDoDisplay(0), + mOsd(NULL), + mOsdLock(), + mLastDataTime(NULL) +{ + memset(&page.data, 0, sizeof(page.data)); + mLastDataTime = (struct timeval *) calloc(1, sizeof(*mLastDataTime)); +} + + +cTtxtSubsDisplay::~cTtxtSubsDisplay(void) +{ + if(mLastDataTime) + free(mLastDataTime); + ClearOSD(); +} + + +void cTtxtSubsDisplay::SetPage(int Pageno) +{ + Clear(); + + mMag = (Pageno >> 8) & 0xF; + mNo = Pageno & 0xFF; +} + + +void cTtxtSubsDisplay::Hide(void) +{ + //dprint("cTtxtSubsDisplay::Hide\n"); + mDoDisplay = 0; + ClearOSD(); +} + + +void cTtxtSubsDisplay::Show(void) +{ + //dprint("cTtxtSubsDisplay::Show\n"); + mDoDisplay = 1; + ShowOSD(); +} + + +void cTtxtSubsDisplay::Clear(void) +{ + mPageState = invalid; + ClearOSD(); +} + + +void cTtxtSubsDisplay::TtxtData(const uint8_t *Data) +{ + int mp; + int mag; // X in ETSI EN 300 706 + int packet; // Y + struct ttxt_data_field *d; + + // idle time - if we have been sitting on a half finished page for a while - show it + if(Data == NULL && mPageState == collecting) { + struct timeval tv; + gettimeofday(&tv, NULL); + // add second diff to usecs + tv.tv_usec += 1000000 * (tv.tv_sec - mLastDataTime->tv_sec); + + if((tv.tv_usec - mLastDataTime->tv_usec) > 500000) { + //dprint("Interimshow!\n"); + mPageState = interimshow; + ClearOSD(); + ShowOSD(); + } + } + + if(Data == NULL) + return; + + //print_line((char *) Data); + + d = (struct ttxt_data_field *) Data; + + mp = unham(invtab[d->mag_addr_ham[0]], invtab[d->mag_addr_ham[1]]); + mag = mp & 0x7; + packet = (mp >> 3) & 0x1f; + + //dprint("cTtxtSubsDisplay::TtxtData: mag:%d packet: %d\n", mag, packet); // XXX + + if(packet == 0) { + int i, no; + uint8_t fi[8]; // flags field inverted + + for(i = 0; i < 8; i++) + fi[i] = invtab[d->data[i]]; + + if(mPageState == collecting) { + mPageState = finished; + ClearOSD(); + ShowOSD(); + } + if(mPageState == interimshow) + mPageState = finished; + + no = unham(fi[0], fi[1]); + + //dprint("cTtxtSubsDisplay::TtxtData: page:%d%02x, packet: %d\n", mag, no, packet); // XXX + //print_line((char *) Data); + + if(mag == mMag && no == mNo) { + //dprint("cTtxtSubsDisplay::TtxtData: page:%d%02x, packet: %d\n", mag, no, packet); // XXX + page.mag = mag; + page.no = no; + page.flags = 0; + page.national_charset = 0; + + if(fi[3] & 0x80) { // Newsflash + page.flags |= erasepage; + memset(&page.data, 0, sizeof(page.data)); // only if erasepage is set? + } + if(fi[5] & 0x20) // Subtitle + page.flags |= newsflash; + if(fi[5] & 0x80) // Suppress Header + page.flags |= subtitle; + // if(fi[6] & 0x08) // Update Indicator + // if(fi[6] & 0x20) // Interrupted Sequence + if(fi[6] & 0x80) // Inhibit Display + page.flags |= inhibit_display; + // if(fi[7] & 0x02) // Magazine Serial + + page.national_charset = ((fi[7] & 0x80) >> 5) + + ((fi[7] & 0x20) >> 4) + ((fi[7] & 0x08) >> 3); + + mPageState = collecting; + gettimeofday(mLastDataTime, NULL); + + for(i = 0; i < 32; i++) + page.data[0][i] = invtab[d->data[i+8]]; + } + } else if(mag == page.mag && packet < TTXT_DISPLAYABLE_ROWS && + (mPageState == collecting || mPageState == interimshow)) { + // mag == page.mag: The magazines can be sent interleaved + int i; + for(i = 0; i < 40; i++) + page.data[packet][i] = invtab[d->data[i]]; + + mPageState = collecting; + gettimeofday(mLastDataTime, NULL); + + //dprint("row: %d ", packet); + //dump_hex("", page.data[packet], 40); + } else { + // packets with national characters information: X/28/0 format 1, X/28/1, X/28/4, M/29/0 M/29/4, + if(packet == 28 || packet == 29) + dprint("mag: %d, packet: %d, page: %02x, state: %d\n", page.mag, packet, page.no, mPageState); + + //if(packet == 26) { + // dprint("mag: %d, packet: %d, page: %02x, state: %d\n", page.mag, packet, page.no, mPageState); + // dump_hex("", page.data[packet], 40); + //} + } +} + + +static char * +ttxt2la1(uint8_t *p, char *buf, int natopts) +{ + int i, j = 0, skip = 1; + for(i = 0; i < 40; i++) { + uint8_t c = p[i] & 0x7f; + + if(c == 0x0b) { // box begin + skip = 0; + if(j != 0) // if we have chars in buf + buf[j++] = ' '; + continue; + } + + if(c == 0x0a) { // box end + skip = 1; + continue; + } + + if(skip) + continue; + + if(j == 0 && c == 20) // skip leading spaces + continue; + + if(c >= 0x20) { + buf[j++] = ttxt_laG0_la1_char(0, natopts, c); + } + } + + while(j > 0 && buf[j-1] == ' ') // strip extra spaces + j--; + + buf[j++] = '\0'; + if(strlen(buf)) + return buf; + else + return NULL; +} + +#define SCREENLEFT 125 +#define SCREENBOT 540 +#if 0 +#define ROWINCR 45 +#define ROWH 36 +#define TEXTY 4 +#else +#define ROWINCR 43 +#define ROWH 34 +#define TEXTY 3 +#endif +#define TEXTX 15 +#define SCREENTOP (SCREENBOT - MAXTTXTROWS * ROWINCR) + +void cTtxtSubsDisplay::ShowOSD(void) +{ + int i, y; + int rowcount = 0; + char buf[TTXT_DISPLAYABLE_ROWS][41]; + int doneWidthWorkaround = 0; + + cMutexLock lock(&mOsdLock); + + if(!mDoDisplay) { + //dprint("NOT displaying subtitles because of other OSD activities!\n"); + return; + } + + if(mPageState != interimshow && mPageState != finished) { + //dprint("NOT displaying subtitles because page state: %d!\n", mPageState); + return; + } + + if(mOsd != NULL) + ClearOSD(); + + //print_page(&page); + + for(i = 1; i < 24; i++) { + if(page.data[i][0] != 0) // anything on this line? + if(ttxt2la1(page.data[i], buf[rowcount], page.national_charset)) + rowcount++; + } + +#if 0 + mOsd = cOsd::OpenRaw(SCREENLEFT, SCREENTOP); +#else + mOsd = cDevice::PrimaryDevice()->NewOsd(SCREENLEFT, SCREENTOP); +#endif + if(mOsd == NULL) { + dprint("Error: cOsd::OpenRaw returned NULL!\n"); + return; + } + + mOsd->SetFont(fontOsd); + + if(rowcount > MAXTTXTROWS) + rowcount = MAXTTXTROWS; + + y = SCREENBOT - SCREENTOP - ROWH - (ROWINCR * (rowcount-1)); + for(i = 0; i < rowcount; i++) { + tWindowHandle wind; + int w = 0; // XXX should be text width - not %4! + + // XXX Width calculations doesn't work before we have created a window... + if(!doneWidthWorkaround) { + wind = mOsd->Create(0, y, 4, ROWH, 2); + w = mOsd->Width(buf[i]) + 2 * TEXTX; + mOsd->Clear(wind); + mOsd->Hide(wind); + doneWidthWorkaround = 1; + } else + w = mOsd->Width(buf[i]) + 2 * TEXTX; + + if(w % 4) + w += 4 - (w % 4); + + wind = mOsd->Create(0, y, w, ROWH, 2); + //dprint("W: %d\n", w); + mOsd->Fill(0, y, w, y + ROWH, clrBackground, wind); + mOsd->Text(TEXTX, y + TEXTY, buf[i], clrWhite, clrBackground, wind); + + y += ROWINCR; + } + + mOsd->Flush(); +} + + +void cTtxtSubsDisplay::ClearOSD(void) +{ + // dprint("\nClearOSD!\n"); + cMutexLock lock(&mOsdLock); + + if(mOsd) { + + mOsd->Clear(ALL_WINDOWS); + mOsd->Hide(ALL_WINDOWS); + mOsd->Flush(); + delete mOsd; + mOsd = NULL; + } +} diff --git a/ttxtsubsdisplay.h b/ttxtsubsdisplay.h new file mode 100644 index 0000000..42905ff --- /dev/null +++ b/ttxtsubsdisplay.h @@ -0,0 +1,35 @@ + +#include "teletext.h" + +struct ttxt_data_field; +struct timeval; + +class cOsdBase; + +#define MAXTTXTROWS 5 + +class cTtxtSubsDisplay { + public: + cTtxtSubsDisplay(void); + ~cTtxtSubsDisplay(void); + + void SetPage(int Pageno); + void Hide(void); + void Show(void); + void Clear(void); + void TtxtData(const uint8_t *); + + protected: + void ShowOSD(); + void ClearOSD(void); + + private: + int mPageState; + int mMag; + int mNo; + int mDoDisplay; + struct ttxt_page page; + cOsdBase *mOsd; + cMutex mOsdLock; + struct timeval *mLastDataTime; +}; diff --git a/ttxtsubsdisplayer.c b/ttxtsubsdisplayer.c new file mode 100644 index 0000000..6983cd2 --- /dev/null +++ b/ttxtsubsdisplayer.c @@ -0,0 +1,256 @@ + +#include "ttxtsubsdisplayer.h" +#include "ttxtsubsdisplay.h" +#include "utils.h" +#include "ttxtsubs.h" +#include "siinfo.h" + +// ----- class cTtxtSubsDisplayer ----- + +cTtxtSubsDisplayer::cTtxtSubsDisplayer(int textpage) + : + mDisp(NULL), + mGetMutex(), + mGetCond(), + mRingBuf(18800, true), + mRun(0) +{ + mDisp = new cTtxtSubsDisplay(); + mDisp->SetPage(textpage); + ShowDisplay(); + + mRun = 1; + this->Start(); // start thread +} + +cTtxtSubsDisplayer::~cTtxtSubsDisplayer(void) +{ + // stop thread + mRun = false; + mGetCond.Broadcast(); + this->Cancel(5); + + if(mDisp) { + delete mDisp; + mDisp = NULL; + } +} + +// handled messages in ring buffer - runs in a thread of its own +void cTtxtSubsDisplayer::Action(void) +{ + while(mRun) { + const cFrame *f; + + f = mRingBuf.Get(); + + if(f) { + mDisp->TtxtData(f->Data()); + mRingBuf.Drop(f); + } else { + // wait for more data + mGetMutex.Lock(); + mGetCond.TimedWait(mGetMutex, 500); + mDisp->TtxtData(NULL); // give display some idle time + mGetMutex.Unlock(); + } + } +} + +void cTtxtSubsDisplayer::ShowDisplay(void) +{ + mDisp->Show(); +} + +void cTtxtSubsDisplayer::HideDisplay(void) +{ + mDisp->Hide(); +} + + +// ----- class cTtxtSubsLiveReceiver ----- + +cTtxtSubsLiveReceiver::cTtxtSubsLiveReceiver(int Pid, int textpage) + : + cReceiver(0, -1, 1, Pid), + cTtxtSubsDisplayer(textpage) +{ +} + +void cTtxtSubsLiveReceiver::Activate(bool On) +{ + //dprint("cTtxtSubsLiveReceiver::Activate: On:%d\n", On); +} + +// Take TS packets and break out the teletext data +// Buffer the data for processing in a separate thread +// XXX We should do some filtering here to avoid unneccessary load! +void cTtxtSubsLiveReceiver::Receive(uchar *Data, int Length) +{ + int i; + + if(Length != 188) // should never happen + return; + + if(Data[1] & 0x80) // transport_error_indicator + return; + + // payload_unit_start_indicator + for(i = (Data[1] & 0x40) ? 1 : 0; i < 4; i++) { + if(0xff == Data[4 + i*46]) // stuffing data + continue; + + cFrame *f = new cFrame(Data + 4 + i*46, 46); + mRingBuf.Put(f); + mGetCond.Broadcast(); + } +} + +// ----- class cTtxtSubsPlayer ----- + +cTtxtSubsPlayer::cTtxtSubsPlayer(char *lang, int HI, int backup_textpage) + : + cTtxtSubsDisplayer(backup_textpage), + mHearingImpaired(HI), + mHasFilteredStream(0), + mFoundLangPage(0), + mLangInfoState(0) +{ + memcpy(mLanguage, lang, 3); + mLanguage[3] = '\0'; +} + +// Take PES packets and break out the teletext data +// Buffer the data for processing in a separate thread +// XXX We should do some filtering here to avoid unneccessary load! +void cTtxtSubsPlayer::PES_data(uchar *p, int Length) +{ + int i; + + //printf("cTtxtSubsPlayer: len: %d\n", Length); // XXX + + if(Length < 46 || p[0] != 0 || p[1] != 0 || p[2] != 1 || p[3] != 0xbd || p[8] != 0x24 || + p[45] < 0x10 || p[45] >= 0x20) { + fprintf(stderr, "cTtxtSubsPlayer::PES_data: bad indata!\n"); + } + + // Recorded teletext typically has payload type 0x10. + // We use the payload type 0x1f to indicate that we have our own + // filtered stream, if we find that we only use that. + + if(p[45] == 0x1f && !mHasFilteredStream) + mHasFilteredStream = 1; + + if(mHasFilteredStream && p[45] != 0x1f) + return; // other teletext data, ignore + + if(mHasFilteredStream && !mFoundLangPage) + SearchLanguagePage(p, Length); + + // payload_unit_start_indicator + for(i = 1; (i*46) < Length ; i++) { + if(0xff == p[i*46]) // stuffing data + continue; + + cFrame *f = new cFrame(p + i*46, 46); + mRingBuf.Put(f); + mGetCond.Broadcast(); + } +} + +static void copy_inv_strip_par(uint8_t *dest, uint8_t *src, size_t len) +{ + size_t i; + for(i = 0; i < len; i++) + dest[i] = invtab[src[i]] & 0x7f; +} + +void cTtxtSubsPlayer::SearchLanguagePage(uint8_t *p, int len) +{ + char *infoline = "Subtitles Index Page"; + int foundlines = 0; + unsigned int foundNonHIPage = 0; + int foundNonHI = 0; // 1 = found non hearing impaired + + if(len < (3*46)) + return; + + struct ttxt_data_field *d; + for(d = ((struct ttxt_data_field *) p) + 1; ((uint8_t *) d) < (p + len + 45); d++) { + int mp = UNHAM_INV(d->mag_addr_ham[0], d->mag_addr_ham[1]); + //int mag = mp & 0x7; + int packet = (mp >> 3) & 0x1f; + uint8_t buf[40]; + + if(d->data_unit_id != 0x02) + break; // a subtitle line + + switch(foundlines) { + case 0: + if(packet != 0) // need a Y0 first + return; + foundlines++; + break; + case 1: + if(packet != 1) // need a Y1 + return; + copy_inv_strip_par(buf, d->data, sizeof(buf)); + if(memcmp((char *) buf, infoline, strlen(infoline))) + return; + foundlines++; + break; + case 2: + mLangInfoState++; + if(mLangInfoState == 3) + fprintf(stderr, "ttxtsubs: Language \"%c%c%c\" not found in recording, available languages:\n", + mLanguage[0], mLanguage[1], mLanguage[2]); + + if(packet < 2) // need a Y2 or more + return; + copy_inv_strip_par(buf, d->data, sizeof(buf)); + for(size_t i = 0; i < 40; i += 8) { + if(mLangInfoState == 3 && buf[i] >= 'a' && buf[i] <= 'z') + fprintf(stderr, " %c%c%c: %c%c%c %s\n", buf[i+4], buf[i+5], buf[i+6], buf[i], buf[i+1], buf[i+2], + buf[i+3] == ' ' ? "" : buf[i+3] == 'h' ? "(Hearing Impaired)" : "(Unknown type)"); + if(buf[i] == mLanguage[0] && + buf[i+1] == mLanguage[1] && + buf[i+2] == mLanguage[2] && + ((buf[i+3] == ' ') || (buf[i+3] == 'h')) && + buf[i+4] >= '1' && buf[i+4] <= '8' && + buf[i+5] >= '0' && buf[i+5] <= '9' && + buf[i+6] >= '0' && buf[i+6] <= '9' && + buf[i+7] == ' ') { + unsigned int page = + ((buf[i+4] - '0') << 8) + + ((buf[i+5] - '0') << 4) + + (buf[i+6] - '0'); + if(page >= 0x100 && page <= 0x900) { + if(page >= 0x800) + page -= 0x800; + + if(((!mHearingImpaired) && (buf[3+i] == ' ')) || + (mHearingImpaired && (buf[3+i] == 'h'))) { + mDisp->SetPage(page); + mFoundLangPage = 1; + fprintf(stderr, "FOUND subtitle page: %03x\n", page); // XXX + return; + } + if(mHearingImpaired && (buf[3+i] == ' ')) { + foundNonHIPage = page; + foundNonHI = 1; + fprintf(stderr, "FOUND non hi subtitle page, remembering: %03x\n", page); // XXX + } + } + } + } + break; + } + } + + if(foundNonHI) { + mDisp->SetPage(foundNonHIPage); + mFoundLangPage = 1; + fprintf(stderr, "Didn't find HI page, but found right language: %03x\n", foundNonHIPage); // XXX + return; + } +} diff --git a/ttxtsubsdisplayer.h b/ttxtsubsdisplayer.h new file mode 100644 index 0000000..00127ff --- /dev/null +++ b/ttxtsubsdisplayer.h @@ -0,0 +1,47 @@ + +#include +#include + +class cTtxtSubsDisplay; + +class cTtxtSubsDisplayer : public cThread { + public: + cTtxtSubsDisplayer(int textpage); + ~cTtxtSubsDisplayer(void); + void ShowDisplay(void); + void HideDisplay(void); + + protected: + virtual void Action(void); + + protected: + cTtxtSubsDisplay *mDisp; + cMutex mGetMutex; + cCondVar mGetCond; + cRingBufferFrame mRingBuf; + int mRun; +}; + +class cTtxtSubsLiveReceiver : public cReceiver, public cTtxtSubsDisplayer { + public: + cTtxtSubsLiveReceiver(int Pid, int textpage); + + protected: + virtual void Activate(bool On); + virtual void Receive(uchar *Data, int Length); +}; + +class cTtxtSubsPlayer : public cTtxtSubsDisplayer { + public: + cTtxtSubsPlayer(char *lang, int HI, int backup_textpage); + virtual void PES_data(uchar *Data, int Length); + + private: + void SearchLanguagePage(uint8_t *p, int len); + + char mLanguage[4]; + int mHearingImpaired; + int mHasFilteredStream; + int mFoundLangPage; + int mLangInfoState; +}; diff --git a/ttxtsubsfilter.c b/ttxtsubsfilter.c new file mode 100644 index 0000000..a50a3fb --- /dev/null +++ b/ttxtsubsfilter.c @@ -0,0 +1,158 @@ + +#include +#include +#include +#include + +#include "ttxtsubsfilter.h" +#include "teletext.h" + +cTtxtSubsFilter::cTtxtSubsFilter(void) + : + mCount(0), + mPages(0) +{ + int i; + for(i = 0; i < 8; i++) + mMagPage[i] = -1; +} + + +cTtxtSubsFilter::~cTtxtSubsFilter(void) +{ + FreePages(); +} + + +void cTtxtSubsFilter::SetPages(int count, uint16_t *pages) +{ + FreePages(); + + mPages = (uint16_t *) malloc(count * sizeof(uint16_t)); + + memcpy((char *) mPages, (char *) pages, count * sizeof(uint16_t)); + + mCount = count; + + if(0) { + int i; + fprintf(stderr, "SetPages: %d, ", count); + for(i = 0; i < count; i++) + fprintf(stderr, "%03x ", pages[i]); + fprintf(stderr, "\n"); + } +} + +// XXX IF MERGING PAGES FROM SEVERAL PIDS (which we currently don't) +// Need to insert a line Y0 if +// - there has been data from other streams inserted and the next line is not a Y0 +// there has been data from other magazines and the next line for this mag is not a Y0 +// indata and outdata are pointers to a ttxt data row buffers, +// if return value <> 0 outdata countains data to pass on +int cTtxtSubsFilter::Filter(char *indata, char *outdata) +{ + int mp; + int mag; // X in ETSI EN 300 706 + int packet; // Y + int result = 0; + + struct ttxt_data_field *d = (struct ttxt_data_field *) indata; + + mp = UNHAM_INV(d->mag_addr_ham[0], d->mag_addr_ham[1]); + mag = mp & 0x7; + packet = (mp >> 3) & 0x1f; + + if (0) { // XXX + uint8_t buf[2]; + ham8_4byte(mp, buf); + fprintf(stderr, "unham %02x %02x -> %02x, ham: %02x %02x\n", + invtab[d->mag_addr_ham[0]], invtab[d->mag_addr_ham[1]], + mp, + buf[0], buf[1]); + } + + // packet 0, change page no in this magazine + if(packet == 0) { + uint8_t no; + int newindex; + + no = UNHAM_INV(d->data[0], d->data[1]); + + mMagPage[mag] = newindex = Find(mCount, mPages, (mag << 8) | no); + + if(newindex != -1) { + //fprintf(stderr, "Filter: %x%02x (%d)\n", mag, no, newindex); // XXX + + MakeY0(outdata, indata, mPages[newindex]); + result = 1; + } + } else if(packet >= 1 && packet <= 25) { + if(mMagPage[mag] != -1) { + memcpy(outdata, indata, sizeof(ttxt_data_field)); + result = 1; + } + } + + return result; +} + + +void cTtxtSubsFilter::FreePages(void) +{ + mCount = 0; + + if(mPages) { + free(mPages); + mPages = NULL; + } +} + + +int cTtxtSubsFilter::Find(int count, uint16_t *pages, uint16_t pageno){ + + int i; + for(i = 0; i < count; i++) { + if(pages[i] == pageno) + return i; + } + + return -1; +} + + +// make a new Y0 line with the flags in +void cTtxtSubsFilter::MakeY0(char *outdata, char *indata, uint16_t newpageno) +{ + struct ttxt_data_field *i = (struct ttxt_data_field *) indata; + struct ttxt_data_field *o = (struct ttxt_data_field *) outdata; + uint8_t hambuf[2]; + + // new magazine number (Y = 0) + ham8_4byte((newpageno >> 8) & 0x7, hambuf); + o->mag_addr_ham[0] = invtab[hambuf[0]]; + o->mag_addr_ham[1] = invtab[hambuf[1]]; + + // new page number + ham8_4byte(newpageno & 0xff, hambuf); + o->data[0] = invtab[hambuf[0]]; + o->data[1] = invtab[hambuf[1]]; + + // copy flags + memcpy(o->data + 2, i->data + 2, 6); + + // new text + char txtbuf[32]; + size_t txtlen; + size_t n; + + txtlen = snprintf(txtbuf, 32, "%03x", newpageno < 0x100 ? newpageno + 0x800 : newpageno); + + for(n = 0; n < txtlen; n++) { + if(parity(txtbuf[n])) + o->data[n + 8] = invtab[txtbuf[n] | 0x80]; // XXX wrong parity? + else + o->data[n + 8] = invtab[txtbuf[n]]; // XXX wrong parity? + } + for(; n < 32; n++) + o->data[n + 8] = invtab[' ']; // space already has right parity +} diff --git a/ttxtsubsfilter.h b/ttxtsubsfilter.h new file mode 100644 index 0000000..3e09b20 --- /dev/null +++ b/ttxtsubsfilter.h @@ -0,0 +1,27 @@ + +// ----- cTtxtSubsFilter ----- + +// Filters out the pages on one teletext stream +class cTtxtSubsFilter +{ + public: + cTtxtSubsFilter(void); + virtual ~cTtxtSubsFilter(void); + + void SetPages(int count, uint16_t *pages); + + // indata and outdata are pointers to a ttxt data row buffers, + // if return value <> 0 outdata countains data to pass on + int Filter(char *indata, char *outdata); + + private: + void FreePages(void); + int Find(int count, uint16_t *pages, uint16_t pageno); + void MakeY0(char *outdata, char *indata, uint16_t newpageno); + + int mCount; // number of pages to filter out + uint16_t *mPages; // array of page numbers + int mMagPage[8]; /* index into pages for each mag number, or -1 if + not currently collecting pages for that mag */ +}; + diff --git a/ttxtsubsreceiver.c b/ttxtsubsreceiver.c new file mode 100644 index 0000000..a497fd6 --- /dev/null +++ b/ttxtsubsreceiver.c @@ -0,0 +1,253 @@ + +#include +#include +#include + +#include "siinfo.h" +#include "ttxtsubsfilter.h" +#include "ttxtsubsreceiver.h" +#include "teletext.h" + +#define MAXINDEXPAGELINES 24 + +// ----- cTtxtSubsReceiver ----- + +cTtxtSubsReceiver::cTtxtSubsReceiver(int Ca, struct ttxtpidinfo *PI) + : + cReceiver(Ca, -1, 1, PI->pid), + mGetMutex(), + mGetCond(), + mRingBuf(46 * 500, true), + mPI(*PI), + mIndexPageLines(0), + mIndexPageCol(0), + mIndexPageNo(0) +{ + int count = 0; + uint16_t *pages = (uint16_t *) malloc(sizeof(uint16_t) * mPI.pagecount); + + // find a free page to put the index page on + mIndexPageNo = 0x100; + int again; + do { + again = 0; + for(int i = 0; i < count; i++) { + if(pages[i] == mIndexPageNo) { + mIndexPageNo++; + if((mIndexPageNo & 0x000f) == 0x000a) + mIndexPageNo += 6; + again = 1; + } + } + } while(again); + + // get pages to record + for(int i = 0; i < mPI.pagecount; i++) { + // only subtitle pages + if(mPI.i[i].type != TTXT_SUBTITLE_PAGE && + mPI.i[i].type != TTXT_SUBTITLE_HEARING_IMPAIRED_PAGE) + continue; + + pages[count] = (mPI.i[i].mag << 8) + mPI.i[i].page; + + AddIndexInfo(mPI.i[i].lang, mPI.i[i].type, pages[count]); + + count++; + } + + mFilter.SetPages(count, pages); + EndIndexInfo(); + + free(pages); +} + + +cTtxtSubsReceiver::~cTtxtSubsReceiver() +{ + // get any waiting threads going + mGetCond.Broadcast(); +} + + +// returns pointer buf if there is new data +uint8_t *cTtxtSubsReceiver::Get(uint8_t *buf) +{ + const cFrame *f; + + f = mRingBuf.Get(); + if(f) { + memcpy(buf, f->Data(), 46); + mRingBuf.Drop(f); + // fprintf(stderr, "cTtxtSubsReceiver::Get: returned data!\n"); + return buf; + } else { + return NULL; + } +} + + +void cTtxtSubsReceiver::IndexPage(char ***lines, int *linecount) +{ + static char *lineptrs[MAXINDEXPAGELINES]; + + for(int i = 0; i < mIndexPageLines; i++) + lineptrs[i] = (char *) mIndexPage[i]; + + *linecount = mIndexPageLines; + *lines = lineptrs; +} + + +// wait for more data +void cTtxtSubsReceiver::Wait(void) +{ + mGetMutex.Lock(); + mGetCond.Wait(mGetMutex); + mGetMutex.Unlock(); +} + + +void cTtxtSubsReceiver::Activate(bool On) +{ +} + + +// Take TS packets and break out the teletext data +// Buffer the data for processing in a separate thread +// XXX We should do some filtering here to avoid unneccessary load! +void cTtxtSubsReceiver::Receive(uchar *Data, int Length) +{ + int i; + + if(Length != 188) // should never happen + return; + + if(Data[1] & 0x80) // transport_error_indicator + return; + + // payload_unit_start_indicator + for(i = (Data[1] & 0x40) ? 1 : 0; i < 4; i++) { + char buf[46]; + + if(0xff == Data[4 + i*46]) // stuffing data + continue; + + if(mFilter.Filter((char *) Data + 4 + i*46, buf)) { + // fprintf(stderr, "Forward Packet:\n"); + // print_line((char *) Data + 4 + i*46); + // print_line(buf); + + cFrame *f = new cFrame((uchar *) buf, 46); + mRingBuf.Put(f); + mGetCond.Broadcast(); + } + } +} + +static void init_line(uint8_t *buf, uint8_t Y, uint8_t mag) +{ + struct ttxt_data_field *d = (struct ttxt_data_field *) buf; + uint8_t magbuf[2]; + + d->data_unit_id = 0x02; // EBU Teletxt non-subtitle data + d->data_unit_length = 0x2c; + d->par_loff = 0xc0; // reserved bits + unknown line + d->framing_code = 0xe4; + ham8_4byte((Y << 3) | (mag & 0x7), magbuf); + d->mag_addr_ham[0] = invtab[magbuf[0]]; + d->mag_addr_ham[1] = invtab[magbuf[1]]; +} + +static void copy_inv_par(uint8_t *dest, uint8_t *src, int count) +{ + for(int i = 0; i < count; i++) + if(parity(src[i])) + dest[i] = invtab[src[i] | 0x80]; + else + dest[i] = invtab[src[i]]; +} + +void cTtxtSubsReceiver::AddIndexInfo(char *lang, int type, uint16_t page) +{ + //fprintf(stderr, "AddIndexInfo: %c%c%c/%d/%03x\n", lang[0], lang[1], lang[2], type, page); // XXX + + if(mIndexPageLines == MAXINDEXPAGELINES) { + fprintf(stderr, "cTtxtSubsReceiver::AddIndexInfo: Index page full!\n"); + return; + } + + if(mIndexPageLines == 0) { // make Y0 and info text + struct ttxt_data_field *d = (struct ttxt_data_field *) mIndexPage[0]; + uint8_t buf[40]; + size_t txtlen; + + init_line(mIndexPage[mIndexPageLines], mIndexPageLines, mIndexPageNo >> 8); + + d->data[0] = invtab[ham8_4nibble(mIndexPageNo & 0x000f)]; + d->data[1] = invtab[ham8_4nibble((mIndexPageNo >> 4) & 0x000f)]; + uint8_t ham_inv_zero = invtab[ham8_4nibble(0)]; + d->data[2] = ham_inv_zero; + d->data[3] = ham_inv_zero; + d->data[4] = ham_inv_zero; + d->data[5] = ham_inv_zero; + d->data[6] = ham_inv_zero; + d->data[7] = ham_inv_zero; + + txtlen = snprintf((char *) buf, 32, "%03x", mIndexPageNo); + copy_inv_par(d->data + 8, buf, txtlen); + for(int i = txtlen; i < 32; i++) + d->data[i+8] = invtab[' ']; // space already has correct parity + + //print_line((char *) mIndexPage[mIndexPageLines]); // XXX + + mIndexPageLines++; + + init_line(mIndexPage[mIndexPageLines], mIndexPageLines, mIndexPageNo >> 8); + d = (struct ttxt_data_field *) mIndexPage[mIndexPageLines]; + char *header = "Subtitles Index Page"; + txtlen = strlen(header); + copy_inv_par(d->data, (uint8_t *) header, txtlen); + for(int i = txtlen; i < 40; i++) + d->data[i] = invtab[' ']; // space already has correct parity + + //print_line((char *) mIndexPage[mIndexPageLines]); // XXX + + mIndexPageLines++; + } + + struct ttxt_data_field *d = (struct ttxt_data_field *) mIndexPage[mIndexPageLines]; + uint8_t buf[10]; + + if(mIndexPageCol == 0) { + init_line(mIndexPage[mIndexPageLines], mIndexPageLines, mIndexPageNo >> 8); + for(int i = 0; i < 40; i++) + d->data[i+8] = invtab[' ']; // space already has correct parity + } + + if(page < 0x100) + page += 0x800; + + snprintf((char *) buf, 10, "%c%c%c%c%03x ", lang[0], lang[1], lang[2], + type == TTXT_SUBTITLE_PAGE ? ' ' : + type == TTXT_SUBTITLE_HEARING_IMPAIRED_PAGE ? 'h' : 'x', + page); + + copy_inv_par(d->data+ mIndexPageCol*8, buf, 8); + + //print_line((char *) mIndexPage[mIndexPageLines]); // XXX + + mIndexPageCol++; + + if(mIndexPageCol == 5) { + mIndexPageCol = 0; + mIndexPageLines++; + } +} + +void cTtxtSubsReceiver::EndIndexInfo(void) +{ + if(mIndexPageCol != 0) { + mIndexPageCol = 0; + mIndexPageLines++; + } +} diff --git a/ttxtsubsreceiver.h b/ttxtsubsreceiver.h new file mode 100644 index 0000000..a88aa65 --- /dev/null +++ b/ttxtsubsreceiver.h @@ -0,0 +1,34 @@ + +class cRingBufferFrame; + +class cTtxtSubsReceiver : public cReceiver +{ + public: + cTtxtSubsReceiver(int Ca, struct ttxtpidinfo *PI); + virtual ~cTtxtSubsReceiver(); + + // returns pointer buf if there is new data + uint8_t *Get(uint8_t *buf); + // wait for more data + void Wait(void); + + void IndexPage(char ***lines, int *linecount); + + protected: + virtual void Activate(bool On); + virtual void Receive(uchar *Data, int Length); + + virtual void AddIndexInfo(char *lang, int type, uint16_t page); + virtual void EndIndexInfo(void); + + private: + cMutex mGetMutex; + cCondVar mGetCond; + cRingBufferFrame mRingBuf; + struct ttxtpidinfo mPI; + cTtxtSubsFilter mFilter; + uint8_t mIndexPage[24][46]; + uint8_t mIndexPageLines; + uint8_t mIndexPageCol; + uint16_t mIndexPageNo; +}; diff --git a/ttxtsubsrecorder.c b/ttxtsubsrecorder.c new file mode 100644 index 0000000..b6719af --- /dev/null +++ b/ttxtsubsrecorder.c @@ -0,0 +1,167 @@ + +#include +#include + +#include +#include +#include +#include +#include + +#include "siinfo.h" +#include "ttxtsubsfilter.h" +#include "ttxtsubsrecorder.h" +#include "ttxtsubsreceiver.h" +#include "ttxtsubs.h" +#include "teletext.h" + +#define MAXPACKETSIZE 20000 + +// ----- cTtxtSubsRecorder ----- + +cTtxtSubsRecorder::cTtxtSubsRecorder(cDevice *dev, const cChannel *ch, char *lang, int HI) + : + 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; + + if(GetTtxtInfo(dev->DeviceNumber(), ch->Sid(), ch->Vpid(), mTtxtinfo)) { + fprintf(stderr, "cTtxtSubsRecorder::cTtxtSubsRecorder: GetTtxtSubtitleInfo error!\n"); + } else { + pi = FindSubs(mTtxtinfo, lang, HI, &pid, &page); + + if(!pi && mTtxtinfo->pidcount > 0) { + pi = &(mTtxtinfo->p[0]); + fprintf(stderr, "Selected language not found, just recording first teletext pid found.\n"); + } + + if(pi) { + mReceiver = new cTtxtSubsReceiver(ch->Ca(), pi); + mPacketBuffer = (uint8_t *) malloc(MAXPACKETSIZE); + } else { + fprintf(stderr, "No teletext pid found, not recording any (obviously).\n"); + } + } +} + +cTtxtSubsRecorder::~cTtxtSubsRecorder(void) +{ + if(mReceiver) { + delete mReceiver; + mReceiver = NULL; + } + + 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]; + + *outbuf = NULL; + + if(!mReceiver) + return *outbuf; + + len = 46; // skip PES header area + + if(mReceiver->Get(line)) { + // 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 + + memcpy((char *) b, (char *) header, sizeof(header)); + b[4] = (len-6) >> 8; + b[5] = (len-6) & 0xff; + 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 + fprintf(stderr, "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); +} + diff --git a/ttxtsubsrecorder.h b/ttxtsubsrecorder.h new file mode 100644 index 0000000..bb9182a --- /dev/null +++ b/ttxtsubsrecorder.h @@ -0,0 +1,23 @@ + +class cDevice; +class cChannel; +class cTtxtSubsReceiver; +struct ttxtinfo; + +class cTtxtSubsRecorder : public cTtxtSubsRecorderBase { + public: + cTtxtSubsRecorder(cDevice *dev, const cChannel *ch, char *lang, int HI); + virtual ~cTtxtSubsRecorder(); + + // returns a PES packet if there is data to add to the recording + virtual uint8_t *GetPacket(uint8_t **buf, size_t *len); + virtual void DeviceAttach(void); + + private: + cDevice *mDev; + int mSid; + int mVid; + ttxtinfo *mTtxtinfo; + cTtxtSubsReceiver *mReceiver; + uint8_t *mPacketBuffer; +}; diff --git a/utils.h b/utils.h new file mode 100644 index 0000000..a473d1b --- /dev/null +++ b/utils.h @@ -0,0 +1,2 @@ + +#define dprint(format, args...) fprintf(stderr, format, ## args) diff --git a/vdrttxtsubshooks.c b/vdrttxtsubshooks.c new file mode 100644 index 0000000..4c1836b --- /dev/null +++ b/vdrttxtsubshooks.c @@ -0,0 +1,44 @@ + +#include +#include +#include + +#include "vdrttxtsubshooks.h" + +// XXX Really should be a list... +static cVDRTtxtsubsHookListener *gListener; + +// ------ class cVDRTtxtsubsHookProxy ------ + +class cVDRTtxtsubsHookProxy : public cVDRTtxtsubsHookListener +{ + public: + virtual void HideOSD(void) { if(gListener) gListener->HideOSD(); }; + virtual void ShowOSD(void) { if(gListener) gListener->ShowOSD(); }; + virtual void PlayerTeletextData(uint8_t *p, int length) + { if(gListener) gListener->PlayerTeletextData(p, length); }; + virtual cTtxtSubsRecorderBase *NewTtxtSubsRecorder(cDevice *dev, const cChannel *ch) + { if(gListener) return gListener->NewTtxtSubsRecorder(dev, ch); else return NULL; }; +}; + + +// ------ class cVDRTtxtsubsHookListener ------ + +cVDRTtxtsubsHookListener::~cVDRTtxtsubsHookListener() +{ + gListener = 0; +} + +void cVDRTtxtsubsHookListener::HookAttach(void) +{ + gListener = this; + //printf("cVDRTtxtsubsHookListener::HookAttach\n"); +} + +static cVDRTtxtsubsHookProxy gProxy; + +cVDRTtxtsubsHookListener *cVDRTtxtsubsHookListener::Hook(void) +{ + return &gProxy; +} + diff --git a/vdrttxtsubshooks.h b/vdrttxtsubshooks.h new file mode 100644 index 0000000..b2a1dcd --- /dev/null +++ b/vdrttxtsubshooks.h @@ -0,0 +1,36 @@ + +#ifndef __VDRTTXTSUBSHOOKS_H +#define __VDRTTXTSUBSHOOKS_H + +class cDevice; +class cChannel; + +#define VDRTTXTSUBSHOOKS + +class cTtxtSubsRecorderBase { + public: + virtual ~cTtxtSubsRecorderBase() {}; + + // returns a PES packet if there is data to add to the recording + virtual uint8_t *GetPacket(uint8_t **buf, size_t *len) { return NULL; }; + virtual void DeviceAttach(void) {}; +}; + +class cVDRTtxtsubsHookListener { + public: + cVDRTtxtsubsHookListener(void) {}; + virtual ~cVDRTtxtsubsHookListener(); + + void HookAttach(void); + + virtual void HideOSD(void) {}; + virtual void ShowOSD(void) {}; + virtual void PlayerTeletextData(uint8_t *p, int length) {}; + virtual cTtxtSubsRecorderBase *NewTtxtSubsRecorder(cDevice *dev, const cChannel *ch) + { return NULL; }; + + // used by VDR to call hook listeners + static cVDRTtxtsubsHookListener *Hook(void); +}; + +#endif __VDRTTXTSUBSHOOKS_H -- cgit v1.2.3