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vdr/dvbdevice.c
Klaus Schmidinger fb5cccb2df Version 1.3.18 
- Removed an unused variable from cTimer::GetWDayFromMDay() (thanks to Wayne Keer
  for reporting this one).
- Some more changes to the 'childTid' handling in cThread (based on suggestions by
  Stefan Huelswitt).
- Fixed the spelling of 'canceling' (thanks to Wayne Keer for reporting this one).
- Re-introduced a sleep to cDvbPlayer::Action() to avoid high CPU load in still
  picture mode (thanks to Reinhard Nissl for reporting this one).
- Fixed a possible race condition in generating the DVB device names (thanks to
  Rainer Zocholl for reporting this one).
- Changed the way PES packets are played to allow replay of AC3 sound over the
  full featured DVB cards (partially based on a patch from Werner Fink).
  + The new function cDevice::PlayPes() is now called with the complete PES data
    stream and calls PlayVideo() and PlayAudio() as necessary.
  + cDevice::PlayVideo() is now only called with actual video PES packets.
  + cDevice::PlayAudio() is now called with the actual audio PES packets, which
    can be either "normal" audio or AC3 data. You need at least firmware version
    0x261d to replay AC3 sound over a full featured DVB card. This function now
    has an 'int' return value.
  + PlayAudio() of derived cDevice classes shall no longer call the base class
    function. It shall just play the given data as audio.
  + cPlayer::PlayVideo() and cPlayer::PlayAudio() are now obsolete and have been
    replaced with cPlayer::PlayPes().
  + All StripAudioPackets() functions are now obsolete. The functionality has been
    moved into cDevice::PlayPes(), where only the video and audio packets that are
    actually required will be processed.
  + All audio track handling is now done by cDevice; cTransfer and cDvbPlayer no
    longer care about audio tracks. cPlayer, however, still has the virtual hooks
    for audio track handling in order to allow plugins to implement players that
    have their own idea about this.
  + cChannel::[AD]pid[12]() have been replaced with cChannel::[AD]pid(int i) to
    allow access to all available PIDs.
- Escaped the '-' and 'ö' characters in the man pages (thanks to Darren Salt for
  pointing this out).
- Completed the Italian OSD texts (thanks to Sean Carlos).
- Fixed setting 'synced' in cRemux when recording radio channels (thanks to
  Laurence Abbott).
- Removed the LOCK_THREAD from the LIRC thread (thanks to Ludwig Nussel).
- Fixed genfontfile.c (sometimes the character width was wrong, and the codes were
  shifted one too far to the left).
- Fixed the character width and shifted the codes one to the right in all font
  files.
- Renamed font???.c to font???-iso8859-1.c for symmetry.
- Switched the character set to iso8859-15 for English, German and Finnish (thanks
  to Andreas Brugger for reporting the missing Euro sign in iso8859-1).
- Added 'channels.conf.terr' entries for Lübeck (thanks to Stefan Hußfeldt).
- Fixed a race condition in starting a thread (thanks to Reinhard Nissl for
  reporting this one).
- Replaced non-threadsafe library functions with their threadsafe versions (thanks
  to Rainer Zocholl for pointing this out).
- Other non-threadsafe functions have been replaced by threadsafe classes that hide
  the actual buffering. In particular these are:
  readdir() -> cReadDir
  readline() -> cReadLine
- Several formerly non-threadsafe functions now have a return type of cString:
  cChannel::ToText()
  tChannelID::ToString()
  cEvent::GetDateString()
  cEvent::GetTimeString()
  cEvent::GetEndTimeString()
  cEvent::GetVpsString()
  cMark::ToText()
  cTimer::ToText()
  cSource::ToString()
  cTimer::PrintDay()
  cTimer::PrintFirstDay()
  PrefixVideoFileName()
  IndexToHMSF()
  ChannelString()
  strescape()
  AddDirectory()
  itoa()
  WeekDayName()
  DayDateTime()
  When using these functions in a 'const char *' context there is nothing special
  to consider, except that you can no longer have a pointer to the return value,
  as in
  const char *date = DayDateTime();
  Although this will compile without error message, the resulting 'date' will not
  be valid after this line. Use this instead:
  cString date = DayDateTime();
  In a 'const void *' context (as in printf() etc.) the result needs to be
  dereferenced with a '*', as in
  printf("%s", *DayDateTime());
  to make it a 'const char *'.
- Removed delay_ms(), using cCondWait::SleepMs() instead.
- Replaced time_ms() with a threadsafe and non-overflowing cTimeMs (thanks to Rainer
  Zocholl for pointing out this problem).
- Added cDevice::mutexReceiver to avoid a race condition when attaching/detaching
  receivers from different threads.
- The new remote control button "Audio" can be used to switch between different
  audio tracks. The "Green" button in the "Main" menu has been changed from "Language"
  to "Audio", since it now also controls switching between normal and Dolby Digital
  audio tracks (see MANUAL for details).
- The description of the audio tracks is now taken from the "component descriptors"
  that are broadcast in the EPG data. However (as no big surprise), not all channels
  actually provide useful data here, so there are now some additional EPG bugfixes,
  which can be activated by setting the "EPG bugfix level" to 3.
- The format of the 'epg.data' files has been extended by the new tag 'X', which
  contains the stream components of an event (see man vdr(5) for details).
- The cStatus class now has the new member function SetAudioTrack(), which can be
  used to get notified when the audio track has been switched, and the new member
  function SetAudioChannel() which is called when the audio channel is changed.
- Skins need to implement the new cSkinDisplayTrack class to display the audio
  track menu.
- The ST:TNG skin now displays the current audio track description (if any) at the
  botton left side.
- The new setup option "DVB/Audio languages" can be used to control which audio
  language shall be selected in case a channel broadcasts in different languages
  (see MANUAL for details).
- The "Left" and "Right" keys in the "Audio" menu can be used to switch between
  the left and right stereo channels in case there are different audio tracks
  in these channels (see MANUAL for details).
- Fixed a possible race condition in cDevice::Action() (thanks to Mattias Grönlund).
- Fixed the default quality value when grabbing a JPEG image (thanks to Patrick
  Gleichmann).
- Fixed deleting a menu item in case the next item is not selectable (thanks to
  Dino Ravnic).
- Implemented displaying mandatory subtitles in the SPU decoder (thanks to Marco
  Schlüßler).
- The setup option "Recording/Record Dolby Digital" has been renamed and moved to
  "DVB/Use Dolby Digital". It now controls whether Dolby Digital is recorded and
  whether an available DD audio track will appear in the "Audio" menu.
- Added support for circular polarization (thanks to Jonan Santiago).
- Thanks to Werner Fink, Reinhard Nissl, Sascha Volkenandt and Bjørnar Nilsen for
  their support in testing and fine tuning this version.
2005-01-09 18:00:00 +01:00

1168 lines
38 KiB
C
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/*
* dvbdevice.c: The DVB device interface
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: dvbdevice.c 1.113 2005/01/09 13:04:20 kls Exp $
*/
#include "dvbdevice.h"
#include <errno.h>
extern "C" {
#ifdef boolean
#define HAVE_BOOLEAN
#endif
#include <jpeglib.h>
#undef boolean
}
#include <limits.h>
#include <linux/videodev.h>
#include <linux/dvb/audio.h>
#include <linux/dvb/dmx.h>
#include <linux/dvb/frontend.h>
#include <linux/dvb/video.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include "channels.h"
#include "diseqc.h"
#include "dvbosd.h"
#include "eitscan.h"
#include "player.h"
#include "receiver.h"
#include "status.h"
#include "transfer.h"
#define DO_REC_AND_PLAY_ON_PRIMARY_DEVICE 1
#define DO_MULTIPLE_RECORDINGS 1
#define DEV_VIDEO "/dev/video"
#define DEV_DVB_ADAPTER "/dev/dvb/adapter"
#define DEV_DVB_OSD "osd"
#define DEV_DVB_FRONTEND "frontend"
#define DEV_DVB_DVR "dvr"
#define DEV_DVB_DEMUX "demux"
#define DEV_DVB_VIDEO "video"
#define DEV_DVB_AUDIO "audio"
#define DEV_DVB_CA "ca"
class cDvbName {
private:
char buffer[PATH_MAX];
public:
cDvbName(const char *Name, int n) {
snprintf(buffer, sizeof(buffer), "%s%d/%s%d", DEV_DVB_ADAPTER, n, Name, 0);
}
const char *operator*() { return buffer; }
};
static int DvbOpen(const char *Name, int n, int Mode, bool ReportError = false)
{
const char *FileName = *cDvbName(Name, n);
int fd = open(FileName, Mode);
if (fd < 0 && ReportError)
LOG_ERROR_STR(FileName);
return fd;
}
// --- cDvbTuner -------------------------------------------------------------
class cDvbTuner : public cThread {
private:
enum eTunerStatus { tsIdle, tsSet, tsTuned, tsLocked, tsCam };
int fd_frontend;
int cardIndex;
fe_type_t frontendType;
cCiHandler *ciHandler;
cChannel channel;
const char *diseqcCommands;
bool active;
bool useCa;
time_t startTime;
eTunerStatus tunerStatus;
cMutex mutex;
cCondVar locked;
cCondWait newSet;
bool GetFrontendEvent(dvb_frontend_event &Event, int TimeoutMs = 0);
bool SetFrontend(void);
virtual void Action(void);
public:
cDvbTuner(int Fd_Frontend, int CardIndex, fe_type_t FrontendType, cCiHandler *CiHandler);
virtual ~cDvbTuner();
bool IsTunedTo(const cChannel *Channel) const;
void Set(const cChannel *Channel, bool Tune, bool UseCa);
bool Locked(int TimeoutMs = 0);
};
cDvbTuner::cDvbTuner(int Fd_Frontend, int CardIndex, fe_type_t FrontendType, cCiHandler *CiHandler)
{
fd_frontend = Fd_Frontend;
cardIndex = CardIndex;
frontendType = FrontendType;
ciHandler = CiHandler;
diseqcCommands = NULL;
active = false;
useCa = false;
tunerStatus = tsIdle;
startTime = time(NULL);
if (frontendType == FE_QPSK)
CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, SEC_VOLTAGE_13)); // must explicitly turn on LNB power
SetDescription("tuner on device %d", cardIndex + 1);
Start();
}
cDvbTuner::~cDvbTuner()
{
active = false;
tunerStatus = tsIdle;
newSet.Signal();
Cancel(3);
}
bool cDvbTuner::IsTunedTo(const cChannel *Channel) const
{
return tunerStatus != tsIdle && channel.Source() == Channel->Source() && channel.Transponder() == Channel->Transponder();
}
void cDvbTuner::Set(const cChannel *Channel, bool Tune, bool UseCa)
{
Lock();
if (Tune)
tunerStatus = tsSet;
else if (tunerStatus == tsCam)
tunerStatus = tsLocked;
useCa = UseCa;
if (Channel->Ca() && tunerStatus != tsCam)
startTime = time(NULL);
channel = *Channel;
Unlock();
newSet.Signal();
}
bool cDvbTuner::Locked(int TimeoutMs)
{
cMutexLock MutexLock(&mutex);
if (TimeoutMs && tunerStatus < tsLocked)
locked.TimedWait(mutex, TimeoutMs);
return tunerStatus >= tsLocked;
}
bool cDvbTuner::GetFrontendEvent(dvb_frontend_event &Event, int TimeoutMs)
{
if (TimeoutMs) {
struct pollfd pfd;
pfd.fd = fd_frontend;
pfd.events = POLLIN | POLLPRI;
do {
int stat = poll(&pfd, 1, TimeoutMs);
if (stat == 1)
break;
if (stat < 0) {
if (errno == EINTR)
continue;
esyslog("ERROR: frontend %d poll failed: %m", cardIndex);
}
return false;
} while (0);
}
do {
int stat = ioctl(fd_frontend, FE_GET_EVENT, &Event);
if (stat == 0)
return true;
if (stat < 0) {
if (errno == EINTR)
continue;
}
} while (0);
return false;
}
static unsigned int FrequencyToHz(unsigned int f)
{
while (f && f < 1000000)
f *= 1000;
return f;
}
bool cDvbTuner::SetFrontend(void)
{
dvb_frontend_parameters Frontend;
memset(&Frontend, 0, sizeof(Frontend));
switch (frontendType) {
case FE_QPSK: { // DVB-S
unsigned int frequency = channel.Frequency();
if (Setup.DiSEqC) {
cDiseqc *diseqc = Diseqcs.Get(channel.Source(), channel.Frequency(), channel.Polarization());
if (diseqc) {
if (diseqc->Commands() && (!diseqcCommands || strcmp(diseqcCommands, diseqc->Commands()) != 0)) {
cDiseqc::eDiseqcActions da;
for (char *CurrentAction = NULL; (da = diseqc->Execute(&CurrentAction)) != cDiseqc::daNone; ) {
switch (da) {
case cDiseqc::daNone: break;
case cDiseqc::daToneOff: CHECK(ioctl(fd_frontend, FE_SET_TONE, SEC_TONE_OFF)); break;
case cDiseqc::daToneOn: CHECK(ioctl(fd_frontend, FE_SET_TONE, SEC_TONE_ON)); break;
case cDiseqc::daVoltage13: CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, SEC_VOLTAGE_13)); break;
case cDiseqc::daVoltage18: CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, SEC_VOLTAGE_18)); break;
case cDiseqc::daMiniA: CHECK(ioctl(fd_frontend, FE_DISEQC_SEND_BURST, SEC_MINI_A)); break;
case cDiseqc::daMiniB: CHECK(ioctl(fd_frontend, FE_DISEQC_SEND_BURST, SEC_MINI_B)); break;
case cDiseqc::daCodes: {
int n = 0;
uchar *codes = diseqc->Codes(n);
if (codes) {
struct dvb_diseqc_master_cmd cmd;
memcpy(cmd.msg, codes, min(n, int(sizeof(cmd.msg))));
cmd.msg_len = n;
CHECK(ioctl(fd_frontend, FE_DISEQC_SEND_MASTER_CMD, &cmd));
}
}
break;
}
}
diseqcCommands = diseqc->Commands();
}
frequency -= diseqc->Lof();
}
else {
esyslog("ERROR: no DiSEqC parameters found for channel %d", channel.Number());
return false;
}
}
else {
int tone = SEC_TONE_OFF;
if (frequency < (unsigned int)Setup.LnbSLOF) {
frequency -= Setup.LnbFrequLo;
tone = SEC_TONE_OFF;
}
else {
frequency -= Setup.LnbFrequHi;
tone = SEC_TONE_ON;
}
int volt = (channel.Polarization() == 'v' || channel.Polarization() == 'V' || channel.Polarization() == 'r' || channel.Polarization() == 'R') ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18;
CHECK(ioctl(fd_frontend, FE_SET_VOLTAGE, volt));
CHECK(ioctl(fd_frontend, FE_SET_TONE, tone));
}
frequency = abs(frequency); // Allow for C-band, where the frequency is less than the LOF
Frontend.frequency = frequency * 1000UL;
Frontend.inversion = fe_spectral_inversion_t(channel.Inversion());
Frontend.u.qpsk.symbol_rate = channel.Srate() * 1000UL;
Frontend.u.qpsk.fec_inner = fe_code_rate_t(channel.CoderateH());
}
break;
case FE_QAM: { // DVB-C
// Frequency and symbol rate:
Frontend.frequency = FrequencyToHz(channel.Frequency());
Frontend.inversion = fe_spectral_inversion_t(channel.Inversion());
Frontend.u.qam.symbol_rate = channel.Srate() * 1000UL;
Frontend.u.qam.fec_inner = fe_code_rate_t(channel.CoderateH());
Frontend.u.qam.modulation = fe_modulation_t(channel.Modulation());
}
break;
case FE_OFDM: { // DVB-T
// Frequency and OFDM paramaters:
Frontend.frequency = FrequencyToHz(channel.Frequency());
Frontend.inversion = fe_spectral_inversion_t(channel.Inversion());
Frontend.u.ofdm.bandwidth = fe_bandwidth_t(channel.Bandwidth());
Frontend.u.ofdm.code_rate_HP = fe_code_rate_t(channel.CoderateH());
Frontend.u.ofdm.code_rate_LP = fe_code_rate_t(channel.CoderateL());
Frontend.u.ofdm.constellation = fe_modulation_t(channel.Modulation());
Frontend.u.ofdm.transmission_mode = fe_transmit_mode_t(channel.Transmission());
Frontend.u.ofdm.guard_interval = fe_guard_interval_t(channel.Guard());
Frontend.u.ofdm.hierarchy_information = fe_hierarchy_t(channel.Hierarchy());
}
break;
default:
esyslog("ERROR: attempt to set channel with unknown DVB frontend type");
return false;
}
if (ioctl(fd_frontend, FE_SET_FRONTEND, &Frontend) < 0) {
esyslog("ERROR: frontend %d: %m", cardIndex);
return false;
}
return true;
}
void cDvbTuner::Action(void)
{
dvb_frontend_event event;
active = true;
while (active) {
Lock();
if (tunerStatus == tsSet) {
while (GetFrontendEvent(event))
; // discard stale events
tunerStatus = SetFrontend() ? tsTuned : tsIdle;
}
if (tunerStatus != tsIdle) {
while (GetFrontendEvent(event, 10)) {
if (event.status & FE_REINIT) {
tunerStatus = tsSet;
esyslog("ERROR: frontend %d was reinitialized - re-tuning", cardIndex);
}
if (event.status & FE_HAS_LOCK) {
cMutexLock MutexLock(&mutex);
tunerStatus = tsLocked;
locked.Broadcast();
}
}
}
if (ciHandler) {
if (ciHandler->Process() && useCa) {
if (tunerStatus == tsLocked) {
for (int Slot = 0; Slot < ciHandler->NumSlots(); Slot++) {
cCiCaPmt CaPmt(channel.Source(), channel.Transponder(), channel.Sid(), ciHandler->GetCaSystemIds(Slot));
if (CaPmt.Valid()) {
CaPmt.AddPid(channel.Vpid(), 2);
CaPmt.AddPid(channel.Apid(0), 4);
CaPmt.AddPid(channel.Apid(1), 4);
CaPmt.AddPid(channel.Dpid(0), 0);
if (ciHandler->SetCaPmt(CaPmt, Slot)) {
tunerStatus = tsCam;
startTime = 0;
}
}
}
}
}
else if (tunerStatus > tsLocked)
tunerStatus = tsLocked;
}
Unlock();
// in the beginning we loop more often to let the CAM connection start up fast
if (tunerStatus != tsTuned)
newSet.Wait((ciHandler && (time(NULL) - startTime < 20)) ? 100 : 1000);
}
}
// --- cDvbDevice ------------------------------------------------------------
int cDvbDevice::devVideoOffset = -1;
cDvbDevice::cDvbDevice(int n)
{
dvbTuner = NULL;
frontendType = fe_type_t(-1); // don't know how else to initialize this - there is no FE_UNKNOWN
spuDecoder = NULL;
digitalAudio = false;
playMode = pmNone;
// Devices that are present on all card types:
int fd_frontend = DvbOpen(DEV_DVB_FRONTEND, n, O_RDWR | O_NONBLOCK);
// Devices that are only present on cards with decoders:
fd_osd = DvbOpen(DEV_DVB_OSD, n, O_RDWR);
fd_video = DvbOpen(DEV_DVB_VIDEO, n, O_RDWR | O_NONBLOCK);
fd_audio = DvbOpen(DEV_DVB_AUDIO, n, O_RDWR | O_NONBLOCK);
fd_stc = DvbOpen(DEV_DVB_DEMUX, n, O_RDWR);
// The DVR device (will be opened and closed as needed):
fd_dvr = -1;
// The offset of the /dev/video devices:
if (devVideoOffset < 0) { // the first one checks this
FILE *f = NULL;
char buffer[PATH_MAX];
for (int ofs = 0; ofs < 100; ofs++) {
snprintf(buffer, sizeof(buffer), "/proc/video/dev/video%d", ofs);
if ((f = fopen(buffer, "r")) != NULL) {
if (fgets(buffer, sizeof(buffer), f)) {
if (strstr(buffer, "DVB Board")) { // found the _first_ DVB card
devVideoOffset = ofs;
dsyslog("video device offset is %d", devVideoOffset);
break;
}
}
else
break;
fclose(f);
}
else
break;
}
if (devVideoOffset < 0)
devVideoOffset = 0;
if (f)
fclose(f);
}
devVideoIndex = (devVideoOffset >= 0 && HasDecoder()) ? devVideoOffset++ : -1;
// Video format:
SetVideoFormat(Setup.VideoFormat ? VIDEO_FORMAT_16_9 : VIDEO_FORMAT_4_3);
// We only check the devices that must be present - the others will be checked before accessing them://XXX
if (fd_frontend >= 0) {
dvb_frontend_info feinfo;
if (ioctl(fd_frontend, FE_GET_INFO, &feinfo) >= 0) {
frontendType = feinfo.type;
ciHandler = cCiHandler::CreateCiHandler(*cDvbName(DEV_DVB_CA, n));
dvbTuner = new cDvbTuner(fd_frontend, CardIndex(), frontendType, ciHandler);
}
else
LOG_ERROR;
}
else
esyslog("ERROR: can't open DVB device %d", n);
StartSectionHandler();
}
cDvbDevice::~cDvbDevice()
{
delete spuDecoder;
delete dvbTuner;
// We're not explicitly closing any device files here, since this sometimes
// caused segfaults. Besides, the program is about to terminate anyway...
}
bool cDvbDevice::Probe(const char *FileName)
{
if (access(FileName, F_OK) == 0) {
dsyslog("probing %s", FileName);
int f = open(FileName, O_RDONLY);
if (f >= 0) {
close(f);
return true;
}
else if (errno != ENODEV && errno != EINVAL)
LOG_ERROR_STR(FileName);
}
else if (errno != ENOENT)
LOG_ERROR_STR(FileName);
return false;
}
bool cDvbDevice::Initialize(void)
{
int found = 0;
int i;
for (i = 0; i < MAXDVBDEVICES; i++) {
if (UseDevice(NextCardIndex())) {
if (Probe(*cDvbName(DEV_DVB_FRONTEND, i))) {
new cDvbDevice(i);
found++;
}
else
break;
}
else
NextCardIndex(1); // skips this one
}
NextCardIndex(MAXDVBDEVICES - i); // skips the rest
if (found > 0)
isyslog("found %d video device%s", found, found > 1 ? "s" : "");
else
isyslog("no DVB device found");
return found > 0;
}
void cDvbDevice::MakePrimaryDevice(bool On)
{
if (HasDecoder())
new cDvbOsdProvider(fd_osd);
}
bool cDvbDevice::HasDecoder(void) const
{
return fd_video >= 0 && fd_audio >= 0;
}
int cDvbDevice::ProvidesCa(const cChannel *Channel) const
{
if (Channel->Ca() >= 0x0100 && ciHandler) {
unsigned short ids[MAXCAIDS + 1];
for (int i = 0; i <= MAXCAIDS; i++) // '<=' copies the terminating 0!
ids[i] = Channel->Ca(i);
return ciHandler->ProvidesCa(ids);
}
return cDevice::ProvidesCa(Channel);
}
cSpuDecoder *cDvbDevice::GetSpuDecoder(void)
{
if (!spuDecoder && IsPrimaryDevice())
spuDecoder = new cDvbSpuDecoder();
return spuDecoder;
}
bool cDvbDevice::GrabImage(const char *FileName, bool Jpeg, int Quality, int SizeX, int SizeY)
{
if (devVideoIndex < 0)
return false;
char buffer[PATH_MAX];
snprintf(buffer, sizeof(buffer), "%s%d", DEV_VIDEO, devVideoIndex);
int videoDev = open(buffer, O_RDWR);
if (videoDev < 0)
LOG_ERROR_STR(buffer);
if (videoDev >= 0) {
int result = 0;
struct video_mbuf mbuf;
result |= ioctl(videoDev, VIDIOCGMBUF, &mbuf);
if (result == 0) {
int msize = mbuf.size;
unsigned char *mem = (unsigned char *)mmap(0, msize, PROT_READ | PROT_WRITE, MAP_SHARED, videoDev, 0);
if (mem && mem != (unsigned char *)-1) {
// set up the size and RGB
struct video_capability vc;
result |= ioctl(videoDev, VIDIOCGCAP, &vc);
struct video_mmap vm;
vm.frame = 0;
if ((SizeX > 0) && (SizeX <= vc.maxwidth) &&
(SizeY > 0) && (SizeY <= vc.maxheight)) {
vm.width = SizeX;
vm.height = SizeY;
}
else {
vm.width = vc.maxwidth;
vm.height = vc.maxheight;
}
vm.format = VIDEO_PALETTE_RGB24;
result |= ioctl(videoDev, VIDIOCMCAPTURE, &vm);
result |= ioctl(videoDev, VIDIOCSYNC, &vm.frame);
// make RGB out of BGR:
int memsize = vm.width * vm.height;
unsigned char *mem1 = mem;
for (int i = 0; i < memsize; i++) {
unsigned char tmp = mem1[2];
mem1[2] = mem1[0];
mem1[0] = tmp;
mem1 += 3;
}
if (Quality < 0)
Quality = 100;
isyslog("grabbing to %s (%s %d %d %d)", FileName, Jpeg ? "JPEG" : "PNM", Quality, vm.width, vm.height);
FILE *f = fopen(FileName, "wb");
if (f) {
if (Jpeg) {
// write JPEG file:
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
jpeg_stdio_dest(&cinfo, f);
cinfo.image_width = vm.width;
cinfo.image_height = vm.height;
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, Quality, true);
jpeg_start_compress(&cinfo, true);
int rs = vm.width * 3;
JSAMPROW rp[vm.height];
for (int k = 0; k < vm.height; k++)
rp[k] = &mem[rs * k];
jpeg_write_scanlines(&cinfo, rp, vm.height);
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
}
else {
// write PNM file:
if (fprintf(f, "P6\n%d\n%d\n255\n", vm.width, vm.height) < 0 ||
fwrite(mem, vm.width * vm.height * 3, 1, f) < 0) {
LOG_ERROR_STR(FileName);
result |= 1;
}
}
fclose(f);
}
else {
LOG_ERROR_STR(FileName);
result |= 1;
}
munmap(mem, msize);
}
else
result |= 1;
}
close(videoDev);
return result == 0;
}
return false;
}
void cDvbDevice::SetVideoFormat(bool VideoFormat16_9)
{
if (HasDecoder())
CHECK(ioctl(fd_video, VIDEO_SET_FORMAT, VideoFormat16_9 ? VIDEO_FORMAT_16_9 : VIDEO_FORMAT_4_3));
}
eVideoSystem cDvbDevice::GetVideoSystem(void)
{
eVideoSystem VideoSystem = vsPAL;
video_size_t vs;
if (ioctl(fd_video, VIDEO_GET_SIZE, &vs) == 0) {
if (vs.h == 480 || vs.h == 240)
VideoSystem = vsNTSC;
}
else
LOG_ERROR;
return VideoSystem;
}
// ptAudio ptVideo ptPcr ptTeletext ptDolby ptOther
dmx_pes_type_t PesTypes[] = { DMX_PES_AUDIO, DMX_PES_VIDEO, DMX_PES_PCR, DMX_PES_TELETEXT, DMX_PES_OTHER, DMX_PES_OTHER };
bool cDvbDevice::SetPid(cPidHandle *Handle, int Type, bool On)
{
if (Handle->pid) {
dmx_pes_filter_params pesFilterParams;
memset(&pesFilterParams, 0, sizeof(pesFilterParams));
if (On) {
if (Handle->handle < 0) {
Handle->handle = DvbOpen(DEV_DVB_DEMUX, CardIndex(), O_RDWR | O_NONBLOCK, true);
if (Handle->handle < 0)
return false;
}
pesFilterParams.pid = Handle->pid;
pesFilterParams.input = DMX_IN_FRONTEND;
pesFilterParams.output = (Type <= ptTeletext && Handle->used <= 1) ? DMX_OUT_DECODER : DMX_OUT_TS_TAP;
pesFilterParams.pes_type= PesTypes[Type < ptOther ? Type : ptOther];
pesFilterParams.flags = DMX_IMMEDIATE_START;
if (ioctl(Handle->handle, DMX_SET_PES_FILTER, &pesFilterParams) < 0) {
LOG_ERROR;
return false;
}
}
else if (!Handle->used) {
CHECK(ioctl(Handle->handle, DMX_STOP));
if (Type <= ptTeletext) {
pesFilterParams.pid = 0x1FFF;
pesFilterParams.input = DMX_IN_FRONTEND;
pesFilterParams.output = DMX_OUT_DECODER;
pesFilterParams.pes_type= PesTypes[Type];
pesFilterParams.flags = DMX_IMMEDIATE_START;
CHECK(ioctl(Handle->handle, DMX_SET_PES_FILTER, &pesFilterParams));
if (PesTypes[Type] == DMX_PES_VIDEO) // let's only do this once
SetPlayMode(pmNone); // necessary to switch a PID from DMX_PES_VIDEO/AUDIO to DMX_PES_OTHER
}
close(Handle->handle);
Handle->handle = -1;
}
}
return true;
}
int cDvbDevice::OpenFilter(u_short Pid, u_char Tid, u_char Mask)
{
const char *FileName = *cDvbName(DEV_DVB_DEMUX, CardIndex());
int f = open(FileName, O_RDWR | O_NONBLOCK);
if (f >= 0) {
dmx_sct_filter_params sctFilterParams;
memset(&sctFilterParams, 0, sizeof(sctFilterParams));
sctFilterParams.pid = Pid;
sctFilterParams.timeout = 0;
sctFilterParams.flags = DMX_IMMEDIATE_START;
sctFilterParams.filter.filter[0] = Tid;
sctFilterParams.filter.mask[0] = Mask;
if (ioctl(f, DMX_SET_FILTER, &sctFilterParams) >= 0)
return f;
else {
esyslog("ERROR: can't set filter (pid=%d, tid=%02X, mask=%02X): %m", Pid, Tid, Mask);
close(f);
}
}
else
esyslog("ERROR: can't open filter handle on '%s'", FileName);
return -1;
}
void cDvbDevice::TurnOffLiveMode(bool LiveView)
{
if (LiveView) {
// Avoid noise while switching:
CHECK(ioctl(fd_audio, AUDIO_SET_MUTE, true));
CHECK(ioctl(fd_video, VIDEO_SET_BLANK, true));
CHECK(ioctl(fd_audio, AUDIO_CLEAR_BUFFER));
CHECK(ioctl(fd_video, VIDEO_CLEAR_BUFFER));
}
// Turn off live PIDs:
DelPid(pidHandles[ptAudio].pid);
DelPid(pidHandles[ptVideo].pid);
DelPid(pidHandles[ptPcr].pid, ptPcr);
DelPid(pidHandles[ptTeletext].pid);
DelPid(pidHandles[ptDolby].pid);
}
bool cDvbDevice::ProvidesSource(int Source) const
{
int type = Source & cSource::st_Mask;
return type == cSource::stNone
|| type == cSource::stCable && frontendType == FE_QAM
|| type == cSource::stSat && frontendType == FE_QPSK
|| type == cSource::stTerr && frontendType == FE_OFDM;
return true;
}
bool cDvbDevice::ProvidesTransponder(const cChannel *Channel) const
{
return ProvidesSource(Channel->Source()) && ((Channel->Source() & cSource::st_Mask) != cSource::stSat || Diseqcs.Get(Channel->Source(), Channel->Frequency(), Channel->Polarization()));
}
bool cDvbDevice::ProvidesChannel(const cChannel *Channel, int Priority, bool *NeedsDetachReceivers) const
{
bool result = false;
bool hasPriority = Priority < 0 || Priority > this->Priority();
bool needsDetachReceivers = false;
if (ProvidesSource(Channel->Source()) && ProvidesCa(Channel)) {
result = hasPriority;
if (Priority >= 0 && Receiving(true)) {
if (dvbTuner->IsTunedTo(Channel)) {
if (Channel->Vpid() && !HasPid(Channel->Vpid()) || Channel->Apid(0) && !HasPid(Channel->Apid(0))) {
#ifdef DO_MULTIPLE_RECORDINGS
if (Ca() > CACONFBASE || Channel->Ca() > CACONFBASE)
needsDetachReceivers = !ciHandler // only LL-firmware can do non-live CA channels
|| Ca() != Channel->Ca();
else if (!IsPrimaryDevice())
result = true;
#ifdef DO_REC_AND_PLAY_ON_PRIMARY_DEVICE
else
result = Priority >= Setup.PrimaryLimit;
#endif
#endif
}
else
result = !IsPrimaryDevice() || Priority >= Setup.PrimaryLimit;
}
else
needsDetachReceivers = true;
}
}
if (NeedsDetachReceivers)
*NeedsDetachReceivers = needsDetachReceivers;
return result;
}
bool cDvbDevice::SetChannelDevice(const cChannel *Channel, bool LiveView)
{
bool IsEncrypted = Channel->Ca() > CACONFBASE && !ciHandler; // only LL-firmware can do non-live CA channels
bool DoTune = !dvbTuner->IsTunedTo(Channel);
bool TurnOffLivePIDs = HasDecoder()
&& (DoTune
|| IsEncrypted && pidHandles[ptVideo].pid != Channel->Vpid() // CA channels can only be decrypted in "live" mode
|| !IsPrimaryDevice()
|| LiveView // for a new live view the old PIDs need to be turned off
|| pidHandles[ptVideo].pid == Channel->Vpid() // for recording the PIDs must be shifted from DMX_PES_AUDIO/VIDEO to DMX_PES_OTHER
);
bool StartTransferMode = IsPrimaryDevice() && !IsEncrypted && !DoTune
&& (LiveView && HasPid(Channel->Vpid()) && pidHandles[ptVideo].pid != Channel->Vpid() // the PID is already set as DMX_PES_OTHER
|| !LiveView && pidHandles[ptVideo].pid == Channel->Vpid() // a recording is going to shift the PIDs from DMX_PES_AUDIO/VIDEO to DMX_PES_OTHER
);
bool TurnOnLivePIDs = HasDecoder() && !StartTransferMode
&& (IsEncrypted // CA channels can only be decrypted in "live" mode
|| LiveView
);
#ifndef DO_MULTIPLE_RECORDINGS
TurnOffLivePIDs = TurnOnLivePIDs = true;
StartTransferMode = false;
#endif
// Turn off live PIDs if necessary:
if (TurnOffLivePIDs)
TurnOffLiveMode(LiveView);
// Set the tuner:
dvbTuner->Set(Channel, DoTune, !EITScanner.UsesDevice(this)); //XXX 1.3: this is an ugly hack - find a cleaner solution//XXX
// If this channel switch was requested by the EITScanner we don't wait for
// a lock and don't set any live PIDs (the EITScanner will wait for the lock
// by itself before setting any filters):
if (EITScanner.UsesDevice(this))
return true;
// PID settings:
if (TurnOnLivePIDs) {
if (!(AddPid(Channel->Ppid(), ptPcr) && AddPid(Channel->Vpid(), ptVideo) && AddPid(Channel->Apid(0), ptAudio))) {
esyslog("ERROR: failed to set PIDs for channel %d on device %d", Channel->Number(), CardIndex() + 1);
return false;
}
if (IsPrimaryDevice())
AddPid(Channel->Tpid(), ptTeletext);
CHECK(ioctl(fd_audio, AUDIO_SET_MUTE, true)); // actually one would expect 'false' here, but according to Marco Schl<68><6C>ler <marco@lordzodiac.de> this works
// to avoid missing audio after replaying a DVD; with 'false' there is an audio disturbance when switching
// between two channels on the same transponder on DVB-S
CHECK(ioctl(fd_audio, AUDIO_SET_AV_SYNC, true));
}
else if (StartTransferMode)
cControl::Launch(new cTransferControl(this, Channel->Vpid(), Channel->Apid(0), Channel->Apid(1), Channel->Dpid(0), Channel->Dpid(1)));
return true;
}
bool cDvbDevice::HasLock(int TimeoutMs)
{
return dvbTuner ? dvbTuner->Locked(TimeoutMs) : false;
}
int cDvbDevice::GetAudioChannelDevice(void)
{
if (HasDecoder()) {
audio_status_t as;
CHECK(ioctl(fd_audio, AUDIO_GET_STATUS, &as));
return as.channel_select;
}
return 0;
}
void cDvbDevice::SetAudioChannelDevice(int AudioChannel)
{
if (HasDecoder())
CHECK(ioctl(fd_audio, AUDIO_CHANNEL_SELECT, AudioChannel));
}
void cDvbDevice::SetVolumeDevice(int Volume)
{
if (HasDecoder()) {
audio_mixer_t am;
// conversion for linear volume response:
am.volume_left = am.volume_right = 2 * Volume - Volume * Volume / 255;
CHECK(ioctl(fd_audio, AUDIO_SET_MIXER, &am));
}
}
void cDvbDevice::SetDigitalAudioDevice(bool On)
{
if (digitalAudio != On) {
if (digitalAudio)
cCondWait::SleepMs(1000); // Wait until any leftover digital data has been flushed
SetVolumeDevice(On || IsMute() ? 0 : CurrentVolume());
digitalAudio = On;
}
}
void cDvbDevice::SetAudioTrackDevice(eTrackType Type)
{
const tTrackId *TrackId = GetTrack(Type);
if (TrackId && TrackId->id) {
if (IS_AUDIO_TRACK(Type)) {
pidHandles[ptAudio].pid = TrackId->id;
SetPid(&pidHandles[ptAudio], ptAudio, true);
}
else if (IS_DOLBY_TRACK(Type)) {
// Currently this works only in Transfer Mode
cChannel *Channel = Channels.GetByNumber(CurrentChannel());
if (Channel)
SetChannelDevice(Channel, false); // this implicitly starts Transfer Mode
}
}
}
bool cDvbDevice::CanReplay(void) const
{
#ifndef DO_REC_AND_PLAY_ON_PRIMARY_DEVICE
if (Receiving())
return false;
#endif
return cDevice::CanReplay() && (Ca() <= MAXDEVICES || ciHandler); // with non-LL-firmware we can only replay if there is no CA recording going on
}
bool cDvbDevice::SetPlayMode(ePlayMode PlayMode)
{
if (PlayMode != pmExtern_THIS_SHOULD_BE_AVOIDED && fd_video < 0 && fd_audio < 0) {
// reopen the devices
fd_video = DvbOpen(DEV_DVB_VIDEO, CardIndex(), O_RDWR | O_NONBLOCK);
fd_audio = DvbOpen(DEV_DVB_AUDIO, CardIndex(), O_RDWR | O_NONBLOCK);
SetVideoFormat(Setup.VideoFormat);
}
switch (PlayMode) {
case pmNone:
// special handling to return from PCM replay:
CHECK(ioctl(fd_video, VIDEO_SET_BLANK, true));
CHECK(ioctl(fd_video, VIDEO_SELECT_SOURCE, VIDEO_SOURCE_MEMORY));
CHECK(ioctl(fd_video, VIDEO_PLAY));
CHECK(ioctl(fd_video, VIDEO_STOP, true));
CHECK(ioctl(fd_audio, AUDIO_STOP, true));
CHECK(ioctl(fd_video, VIDEO_CLEAR_BUFFER));
CHECK(ioctl(fd_audio, AUDIO_CLEAR_BUFFER));
CHECK(ioctl(fd_video, VIDEO_SELECT_SOURCE, VIDEO_SOURCE_DEMUX));
CHECK(ioctl(fd_audio, AUDIO_SELECT_SOURCE, AUDIO_SOURCE_DEMUX));
CHECK(ioctl(fd_audio, AUDIO_SET_AV_SYNC, true));
CHECK(ioctl(fd_audio, AUDIO_SET_MUTE, false));
break;
case pmAudioVideo:
case pmAudioOnlyBlack:
if (playMode == pmNone)
TurnOffLiveMode(true);
CHECK(ioctl(fd_video, VIDEO_SET_BLANK, true));
CHECK(ioctl(fd_audio, AUDIO_SELECT_SOURCE, AUDIO_SOURCE_MEMORY));
CHECK(ioctl(fd_audio, AUDIO_SET_AV_SYNC, PlayMode == pmAudioVideo));
CHECK(ioctl(fd_audio, AUDIO_PLAY));
CHECK(ioctl(fd_video, VIDEO_SELECT_SOURCE, VIDEO_SOURCE_MEMORY));
CHECK(ioctl(fd_video, VIDEO_PLAY));
break;
case pmAudioOnly:
CHECK(ioctl(fd_video, VIDEO_SET_BLANK, true));
CHECK(ioctl(fd_audio, AUDIO_STOP, true));
CHECK(ioctl(fd_audio, AUDIO_CLEAR_BUFFER));
CHECK(ioctl(fd_audio, AUDIO_SELECT_SOURCE, AUDIO_SOURCE_MEMORY));
CHECK(ioctl(fd_audio, AUDIO_SET_AV_SYNC, false));
CHECK(ioctl(fd_audio, AUDIO_PLAY));
CHECK(ioctl(fd_video, VIDEO_SET_BLANK, false));
break;
case pmVideoOnly:
CHECK(ioctl(fd_video, VIDEO_SET_BLANK, true));
CHECK(ioctl(fd_video, VIDEO_STOP, true));
CHECK(ioctl(fd_audio, AUDIO_SELECT_SOURCE, AUDIO_SOURCE_DEMUX));
CHECK(ioctl(fd_audio, AUDIO_SET_AV_SYNC, false));
CHECK(ioctl(fd_audio, AUDIO_PLAY));
CHECK(ioctl(fd_video, VIDEO_CLEAR_BUFFER));
CHECK(ioctl(fd_video, VIDEO_SELECT_SOURCE, VIDEO_SOURCE_MEMORY));
CHECK(ioctl(fd_video, VIDEO_PLAY));
break;
case pmExtern_THIS_SHOULD_BE_AVOIDED:
close(fd_video);
close(fd_audio);
fd_video = fd_audio = -1;
break;
}
playMode = PlayMode;
return true;
}
int64_t cDvbDevice::GetSTC(void)
{
if (fd_stc >= 0) {
struct dmx_stc stc;
stc.num = 0;
if (ioctl(fd_stc, DMX_GET_STC, &stc) == -1) {
esyslog("ERROR: stc %d: %m", CardIndex() + 1);
return -1;
}
return stc.stc / stc.base;
}
return -1;
}
void cDvbDevice::TrickSpeed(int Speed)
{
if (fd_video >= 0)
CHECK(ioctl(fd_video, VIDEO_SLOWMOTION, Speed));
}
void cDvbDevice::Clear(void)
{
if (fd_video >= 0)
CHECK(ioctl(fd_video, VIDEO_CLEAR_BUFFER));
if (fd_audio >= 0)
CHECK(ioctl(fd_audio, AUDIO_CLEAR_BUFFER));
cDevice::Clear();
}
void cDvbDevice::Play(void)
{
if (playMode == pmAudioOnly || playMode == pmAudioOnlyBlack) {
if (fd_audio >= 0)
CHECK(ioctl(fd_audio, AUDIO_CONTINUE));
}
else {
if (fd_audio >= 0)
CHECK(ioctl(fd_audio, AUDIO_SET_AV_SYNC, true));
if (fd_video >= 0)
CHECK(ioctl(fd_video, VIDEO_CONTINUE));
}
cDevice::Play();
}
void cDvbDevice::Freeze(void)
{
if (playMode == pmAudioOnly || playMode == pmAudioOnlyBlack) {
if (fd_audio >= 0)
CHECK(ioctl(fd_audio, AUDIO_PAUSE));
}
else {
if (fd_audio >= 0)
CHECK(ioctl(fd_audio, AUDIO_SET_AV_SYNC, false));
if (fd_video >= 0)
CHECK(ioctl(fd_video, VIDEO_FREEZE));
}
cDevice::Freeze();
}
void cDvbDevice::Mute(void)
{
if (fd_audio >= 0) {
CHECK(ioctl(fd_audio, AUDIO_SET_AV_SYNC, false));
CHECK(ioctl(fd_audio, AUDIO_SET_MUTE, true));
}
cDevice::Mute();
}
void cDvbDevice::StillPicture(const uchar *Data, int Length)
{
/* Using the VIDEO_STILLPICTURE ioctl call would be the
correct way to display a still frame, but unfortunately this
doesn't work with frames from VDR. So let's do pretty much the
same here as in DVB/driver/dvb.c's play_iframe() - I have absolutely
no idea why it works this way, but doesn't work with VIDEO_STILLPICTURE.
If anybody ever finds out what could be changed so that VIDEO_STILLPICTURE
could be used, please let me know!
kls 2002-03-23
2003-08-30: apparently the driver can't handle PES data, so Oliver Endriss
<o.endriss@gmx.de> has changed this to strip all PES headers
and send pure ES data to the driver. Seems to work just fine!
Let's drop the VIDEO_STILLPICTURE_WORKS_WITH_VDR_FRAMES stuff
once this has proven to work in all cases.
*/
#define VIDEO_STILLPICTURE_WORKS_WITH_VDR_FRAMES
#ifdef VIDEO_STILLPICTURE_WORKS_WITH_VDR_FRAMES
if (Data[0] == 0x00 && Data[1] == 0x00 && Data[2] == 0x01 && (Data[3] & 0xF0) == 0xE0) {
// PES data
char *buf = MALLOC(char, Length);
if (!buf)
return;
int i = 0;
int blen = 0;
while (i < Length - 6) {
if (Data[i] == 0x00 && Data[i + 1] == 0x00 && Data[i + 2] == 0x01) {
int len = Data[i + 4] * 256 + Data[i + 5];
if ((Data[i + 3] & 0xF0) == 0xE0) { // video packet
// skip PES header
int offs = i + 6;
// skip header extension
if ((Data[i + 6] & 0xC0) == 0x80) {
// MPEG-2 PES header
if (Data[i + 8] >= Length)
break;
offs += 3;
offs += Data[i + 8];
len -= 3;
len -= Data[i + 8];
if (len < 0 || offs + len > Length)
break;
}
else {
// MPEG-1 PES header
while (offs < Length && len > 0 && Data[offs] == 0xFF) {
offs++;
len--;
}
if (offs <= Length - 2 && len >= 2 && (Data[offs] & 0xC0) == 0x40) {
offs += 2;
len -= 2;
}
if (offs <= Length - 5 && len >= 5 && (Data[offs] & 0xF0) == 0x20) {
offs += 5;
len -= 5;
}
else if (offs <= Length - 10 && len >= 10 && (Data[offs] & 0xF0) == 0x30) {
offs += 10;
len -= 10;
}
else if (offs < Length && len > 0) {
offs++;
len--;
}
}
if (blen + len > Length) // invalid PES length field
break;
memcpy(&buf[blen], &Data[offs], len);
i = offs + len;
blen += len;
}
else if (Data[i + 3] >= 0xBD && Data[i + 3] <= 0xDF) // other PES packets
i += len + 6;
else
i++;
}
else
i++;
}
video_still_picture sp = { buf, blen };
CHECK(ioctl(fd_video, VIDEO_STILLPICTURE, &sp));
free(buf);
}
else {
// non-PES data
video_still_picture sp = { (char *)Data, Length };
CHECK(ioctl(fd_video, VIDEO_STILLPICTURE, &sp));
}
#else
#define MIN_IFRAME 400000
for (int i = MIN_IFRAME / Length + 1; i > 0; i--) {
safe_write(fd_video, Data, Length);
cCondWait::SleepMs(1); // allows the buffer to be displayed in case the progress display is active
}
#endif
}
bool cDvbDevice::Poll(cPoller &Poller, int TimeoutMs)
{
Poller.Add((playMode == pmAudioOnly || playMode == pmAudioOnlyBlack) ? fd_audio : fd_video, true);
return Poller.Poll(TimeoutMs);
}
bool cDvbDevice::Flush(int TimeoutMs)
{
//TODO actually this function should wait until all buffered data has been processed by the card, but how?
return true;
}
int cDvbDevice::PlayVideo(const uchar *Data, int Length)
{
return write(fd_video, Data, Length);
}
int cDvbDevice::PlayAudio(const uchar *Data, int Length)
{
return write(fd_audio, Data, Length);
}
bool cDvbDevice::OpenDvr(void)
{
CloseDvr();
fd_dvr = DvbOpen(DEV_DVB_DVR, CardIndex(), O_RDONLY | O_NONBLOCK, true);
if (fd_dvr >= 0)
tsBuffer = new cTSBuffer(fd_dvr, MEGABYTE(2), CardIndex() + 1);
return fd_dvr >= 0;
}
void cDvbDevice::CloseDvr(void)
{
if (fd_dvr >= 0) {
delete tsBuffer;
tsBuffer = NULL;
close(fd_dvr);
fd_dvr = -1;
}
}
bool cDvbDevice::GetTSPacket(uchar *&Data)
{
if (tsBuffer) {
Data = tsBuffer->Get();
return true;
}
return false;
}
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