Permalink
Find file
Fetching contributors…
Cannot retrieve contributors at this time
907 lines (837 sloc) 25.2 KB
/*
* dvbplayer.c: The DVB player
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: dvbplayer.c 2.26 2012/03/12 14:36:55 kls Exp $
*/
#include "dvbplayer.h"
#include <math.h>
#include <stdlib.h>
#include "recording.h"
#include "remux.h"
#include "ringbuffer.h"
#include "thread.h"
#include "tools.h"
// --- cPtsIndex -------------------------------------------------------------
#define PTSINDEX_ENTRIES 500
class cPtsIndex {
private:
struct tPtsIndex {
uint32_t pts; // no need for 33 bit - some devices don't even supply the msb
int index;
};
tPtsIndex pi[PTSINDEX_ENTRIES];
int w, r;
int lastFound;
cMutex mutex;
public:
cPtsIndex(void);
void Clear(void);
void Put(uint32_t Pts, int Index);
int FindIndex(uint32_t Pts);
};
cPtsIndex::cPtsIndex(void)
{
lastFound = 0;
Clear();
}
void cPtsIndex::Clear(void)
{
cMutexLock MutexLock(&mutex);
w = r = 0;
}
void cPtsIndex::Put(uint32_t Pts, int Index)
{
cMutexLock MutexLock(&mutex);
pi[w].pts = Pts;
pi[w].index = Index;
w = (w + 1) % PTSINDEX_ENTRIES;
if (w == r)
r = (r + 1) % PTSINDEX_ENTRIES;
}
int cPtsIndex::FindIndex(uint32_t Pts)
{
cMutexLock MutexLock(&mutex);
if (w == r)
return lastFound; // list is empty, let's not jump way off the last known position
uint32_t Delta = 0xFFFFFFFF;
int Index = -1;
for (int i = w; i != r; ) {
if (--i < 0)
i = PTSINDEX_ENTRIES - 1;
uint32_t d = pi[i].pts < Pts ? Pts - pi[i].pts : pi[i].pts - Pts;
if (d > 0x7FFFFFFF)
d = 0xFFFFFFFF - d; // handle rollover
if (d < Delta) {
Delta = d;
Index = pi[i].index;
}
}
lastFound = Index;
return Index;
}
// --- cNonBlockingFileReader ------------------------------------------------
class cNonBlockingFileReader : public cThread {
private:
cUnbufferedFile *f;
uchar *buffer;
int wanted;
int length;
cCondWait newSet;
cCondVar newDataCond;
cMutex newDataMutex;
protected:
void Action(void);
public:
cNonBlockingFileReader(void);
~cNonBlockingFileReader();
void Clear(void);
void Request(cUnbufferedFile *File, int Length);
int Result(uchar **Buffer);
bool Reading(void) { return buffer; }
bool WaitForDataMs(int msToWait);
};
cNonBlockingFileReader::cNonBlockingFileReader(void)
:cThread("non blocking file reader")
{
f = NULL;
buffer = NULL;
wanted = length = 0;
Start();
}
cNonBlockingFileReader::~cNonBlockingFileReader()
{
newSet.Signal();
Cancel(3);
free(buffer);
}
void cNonBlockingFileReader::Clear(void)
{
Lock();
f = NULL;
free(buffer);
buffer = NULL;
wanted = length = 0;
Unlock();
}
void cNonBlockingFileReader::Request(cUnbufferedFile *File, int Length)
{
Lock();
Clear();
wanted = Length;
buffer = MALLOC(uchar, wanted);
f = File;
Unlock();
newSet.Signal();
}
int cNonBlockingFileReader::Result(uchar **Buffer)
{
LOCK_THREAD;
if (buffer && length == wanted) {
*Buffer = buffer;
buffer = NULL;
return wanted;
}
errno = EAGAIN;
return -1;
}
void cNonBlockingFileReader::Action(void)
{
while (Running()) {
Lock();
if (f && buffer && length < wanted) {
int r = f->Read(buffer + length, wanted - length);
if (r > 0)
length += r;
else if (r == 0) { // r == 0 means EOF
if (length > 0)
wanted = length; // already read something, so return the rest
else
length = wanted = 0; // report EOF
}
else if (FATALERRNO) {
LOG_ERROR;
length = wanted = r; // this will forward the error status to the caller
}
if (length == wanted) {
cMutexLock NewDataLock(&newDataMutex);
newDataCond.Broadcast();
}
}
Unlock();
newSet.Wait(1000);
}
}
bool cNonBlockingFileReader::WaitForDataMs(int msToWait)
{
cMutexLock NewDataLock(&newDataMutex);
if (buffer && length == wanted)
return true;
return newDataCond.TimedWait(newDataMutex, msToWait);
}
// --- cDvbPlayer ------------------------------------------------------------
#define PLAYERBUFSIZE MEGABYTE(1)
#define RESUMEBACKUP 10 // number of seconds to back up when resuming an interrupted replay session
#define MAXSTUCKATEOF 3 // max. number of seconds to wait in case the device doesn't play the last frame
class cDvbPlayer : public cPlayer, cThread {
private:
enum ePlayModes { pmPlay, pmPause, pmSlow, pmFast, pmStill };
enum ePlayDirs { pdForward, pdBackward };
static int Speeds[];
cNonBlockingFileReader *nonBlockingFileReader;
cRingBufferFrame *ringBuffer;
cPtsIndex ptsIndex;
cFileName *fileName;
cIndexFile *index;
cUnbufferedFile *replayFile;
double framesPerSecond;
bool isPesRecording;
bool pauseLive;
bool eof;
bool firstPacket;
ePlayModes playMode;
ePlayDirs playDir;
int trickSpeed;
int readIndex;
bool readIndependent;
cFrame *readFrame;
cFrame *playFrame;
cFrame *dropFrame;
void TrickSpeed(int Increment);
void Empty(void);
bool NextFile(uint16_t FileNumber = 0, off_t FileOffset = -1);
int Resume(void);
bool Save(void);
protected:
virtual void Activate(bool On);
virtual void Action(void);
public:
cDvbPlayer(const char *FileName, bool PauseLive);
virtual ~cDvbPlayer();
bool Active(void) { return cThread::Running(); }
void Pause(void);
void Play(void);
void Forward(void);
void Backward(void);
int SkipFrames(int Frames);
void SkipSeconds(int Seconds);
void Goto(int Position, bool Still = false);
virtual double FramesPerSecond(void) { return framesPerSecond; }
virtual bool GetIndex(int &Current, int &Total, bool SnapToIFrame = false);
virtual bool GetReplayMode(bool &Play, bool &Forward, int &Speed);
};
#define MAX_VIDEO_SLOWMOTION 63 // max. arg to pass to VIDEO_SLOWMOTION // TODO is this value correct?
#define NORMAL_SPEED 4 // the index of the '1' entry in the following array
#define MAX_SPEEDS 3 // the offset of the maximum speed from normal speed in either direction
#define SPEED_MULT 12 // the speed multiplier
int cDvbPlayer::Speeds[] = { 0, -2, -4, -8, 1, 2, 4, 12, 0 };
cDvbPlayer::cDvbPlayer(const char *FileName, bool PauseLive)
:cThread("dvbplayer")
{
nonBlockingFileReader = NULL;
ringBuffer = NULL;
index = NULL;
cRecording Recording(FileName);
framesPerSecond = Recording.FramesPerSecond();
isPesRecording = Recording.IsPesRecording();
pauseLive = PauseLive;
eof = false;
firstPacket = true;
playMode = pmPlay;
playDir = pdForward;
trickSpeed = NORMAL_SPEED;
readIndex = -1;
readIndependent = false;
readFrame = NULL;
playFrame = NULL;
dropFrame = NULL;
isyslog("replay %s", FileName);
fileName = new cFileName(FileName, false, false, isPesRecording);
replayFile = fileName->Open();
if (!replayFile)
return;
ringBuffer = new cRingBufferFrame(PLAYERBUFSIZE);
// Create the index file:
index = new cIndexFile(FileName, false, isPesRecording, pauseLive);
if (!index)
esyslog("ERROR: can't allocate index");
else if (!index->Ok()) {
delete index;
index = NULL;
}
else if (PauseLive)
framesPerSecond = cRecording(FileName).FramesPerSecond(); // the fps rate might have changed from the default
}
cDvbPlayer::~cDvbPlayer()
{
Save();
Detach();
delete readFrame; // might not have been stored in the buffer in Action()
delete index;
delete fileName;
delete ringBuffer;
}
void cDvbPlayer::TrickSpeed(int Increment)
{
int nts = trickSpeed + Increment;
if (Speeds[nts] == 1) {
trickSpeed = nts;
if (playMode == pmFast)
Play();
else
Pause();
}
else if (Speeds[nts]) {
trickSpeed = nts;
int Mult = (playMode == pmSlow && playDir == pdForward) ? 1 : SPEED_MULT;
int sp = (Speeds[nts] > 0) ? Mult / Speeds[nts] : -Speeds[nts] * Mult;
if (sp > MAX_VIDEO_SLOWMOTION)
sp = MAX_VIDEO_SLOWMOTION;
DeviceTrickSpeed(sp);
}
}
void cDvbPlayer::Empty(void)
{
LOCK_THREAD;
if (nonBlockingFileReader)
nonBlockingFileReader->Clear();
if (!firstPacket) // don't set the readIndex twice if Empty() is called more than once
readIndex = ptsIndex.FindIndex(DeviceGetSTC()) - 1; // Action() will first increment it!
delete readFrame; // might not have been stored in the buffer in Action()
readFrame = NULL;
playFrame = NULL;
dropFrame = NULL;
ringBuffer->Clear();
ptsIndex.Clear();
DeviceClear();
firstPacket = true;
}
bool cDvbPlayer::NextFile(uint16_t FileNumber, off_t FileOffset)
{
if (FileNumber > 0)
replayFile = fileName->SetOffset(FileNumber, FileOffset);
else if (replayFile && eof)
replayFile = fileName->NextFile();
eof = false;
return replayFile != NULL;
}
int cDvbPlayer::Resume(void)
{
if (index) {
int Index = index->GetResume();
if (Index >= 0) {
uint16_t FileNumber;
off_t FileOffset;
if (index->Get(Index, &FileNumber, &FileOffset) && NextFile(FileNumber, FileOffset))
return Index;
}
}
return -1;
}
bool cDvbPlayer::Save(void)
{
if (index) {
int Index = ptsIndex.FindIndex(DeviceGetSTC());
if (Index >= 0) {
Index -= int(round(RESUMEBACKUP * framesPerSecond));
if (Index > 0)
Index = index->GetNextIFrame(Index, false);
else
Index = 0;
if (Index >= 0)
return index->StoreResume(Index);
}
}
return false;
}
void cDvbPlayer::Activate(bool On)
{
if (On) {
if (replayFile)
Start();
}
else
Cancel(9);
}
void cDvbPlayer::Action(void)
{
uchar *p = NULL;
int pc = 0;
readIndex = Resume();
if (readIndex >= 0)
isyslog("resuming replay at index %d (%s)", readIndex, *IndexToHMSF(readIndex, true, framesPerSecond));
nonBlockingFileReader = new cNonBlockingFileReader;
int Length = 0;
bool Sleep = false;
bool WaitingForData = false;
time_t StuckAtEof = 0;
uint32_t LastStc = 0;
int LastReadIFrame = -1;
int SwitchToPlayFrame = 0;
if (pauseLive)
Goto(0, true);
while (Running()) {
if (WaitingForData)
nonBlockingFileReader->WaitForDataMs(3); // this keeps the CPU load low, but reacts immediately on new data
else if (Sleep) {
cPoller Poller;
DevicePoll(Poller, 10);
Sleep = false;
if (playMode == pmStill || playMode == pmPause)
cCondWait::SleepMs(3);
}
{
LOCK_THREAD;
// Read the next frame from the file:
if (playMode != pmStill && playMode != pmPause) {
if (!readFrame && (replayFile || readIndex >= 0)) {
if (!nonBlockingFileReader->Reading()) {
if (!SwitchToPlayFrame && (playMode == pmFast || (playMode == pmSlow && playDir == pdBackward))) {
uint16_t FileNumber;
off_t FileOffset;
bool TimeShiftMode = index->IsStillRecording();
int Index = -1;
readIndependent = false;
if (DeviceHasIBPTrickSpeed() && playDir == pdForward) {
if (index->Get(readIndex + 1, &FileNumber, &FileOffset, &readIndependent, &Length))
Index = readIndex + 1;
}
else {
int d = int(round(0.4 * framesPerSecond));
if (playDir != pdForward)
d = -d;
int NewIndex = readIndex + d;
if (NewIndex <= 0 && readIndex > 0)
NewIndex = 1; // make sure the very first frame is delivered
NewIndex = index->GetNextIFrame(NewIndex, playDir == pdForward, &FileNumber, &FileOffset, &Length);
if (NewIndex < 0 && TimeShiftMode && playDir == pdForward)
SwitchToPlayFrame = readIndex;
Index = NewIndex;
readIndependent = true;
}
if (Index >= 0) {
readIndex = Index;
if (!NextFile(FileNumber, FileOffset))
continue;
}
else if (!(TimeShiftMode && playDir == pdForward))
eof = true;
}
else if (index) {
uint16_t FileNumber;
off_t FileOffset;
if (index->Get(readIndex + 1, &FileNumber, &FileOffset, &readIndependent, &Length) && NextFile(FileNumber, FileOffset))
readIndex++;
else
eof = true;
}
else // allows replay even if the index file is missing
Length = MAXFRAMESIZE;
if (Length == -1)
Length = MAXFRAMESIZE; // this means we read up to EOF (see cIndex)
else if (Length > MAXFRAMESIZE) {
esyslog("ERROR: frame larger than buffer (%d > %d)", Length, MAXFRAMESIZE);
Length = MAXFRAMESIZE;
}
if (!eof)
nonBlockingFileReader->Request(replayFile, Length);
}
if (!eof) {
uchar *b = NULL;
int r = nonBlockingFileReader->Result(&b);
if (r > 0) {
WaitingForData = false;
uint32_t Pts = 0;
if (readIndependent) {
Pts = isPesRecording ? PesGetPts(b) : TsGetPts(b, r);
LastReadIFrame = readIndex;
}
readFrame = new cFrame(b, -r, ftUnknown, readIndex, Pts); // hands over b to the ringBuffer
}
else if (r < 0) {
if (errno == EAGAIN)
WaitingForData = true;
else if (FATALERRNO) {
LOG_ERROR;
break;
}
}
else
eof = true;
}
}
// Store the frame in the buffer:
if (readFrame) {
if (ringBuffer->Put(readFrame))
readFrame = NULL;
else
Sleep = true;
}
}
else
Sleep = true;
if (dropFrame) {
if (!eof || (playDir != pdForward && dropFrame->Index() > 0) || (playDir == pdForward && dropFrame->Index() < readIndex)) {
ringBuffer->Drop(dropFrame); // the very first and last frame are continously repeated to flush data through the device
dropFrame = NULL;
}
}
// Get the next frame from the buffer:
if (!playFrame) {
playFrame = ringBuffer->Get();
p = NULL;
pc = 0;
}
// Play the frame:
if (playFrame) {
if (!p) {
p = playFrame->Data();
pc = playFrame->Count();
if (p) {
if (playFrame->Index() >= 0 && playFrame->Pts() != 0)
ptsIndex.Put(playFrame->Pts(), playFrame->Index());
if (firstPacket) {
if (isPesRecording) {
PlayPes(NULL, 0);
cRemux::SetBrokenLink(p, pc);
}
else
PlayTs(NULL, 0);
firstPacket = false;
}
}
}
if (p) {
int w;
if (isPesRecording)
w = PlayPes(p, pc, playMode != pmPlay && !(playMode == pmSlow && playDir == pdForward) && DeviceIsPlayingVideo());
else
w = PlayTs(p, pc, playMode != pmPlay && !(playMode == pmSlow && playDir == pdForward) && DeviceIsPlayingVideo());
if (w > 0) {
p += w;
pc -= w;
}
else if (w < 0 && FATALERRNO)
LOG_ERROR;
else
Sleep = true;
}
if (pc <= 0) {
dropFrame = playFrame;
playFrame = NULL;
p = NULL;
}
}
else
Sleep = true;
// Handle hitting begin/end of recording:
if (eof || SwitchToPlayFrame) {
bool SwitchToPlay = false;
uint32_t Stc = DeviceGetSTC();
if (Stc != LastStc)
StuckAtEof = 0;
else if (!StuckAtEof)
StuckAtEof = time(NULL);
else if (time(NULL) - StuckAtEof > MAXSTUCKATEOF) {
if (playDir == pdForward)
break; // automatically stop at end of recording
SwitchToPlay = true;
}
LastStc = Stc;
int Index = ptsIndex.FindIndex(Stc);
if (playDir == pdForward && !SwitchToPlayFrame) {
if (Index >= LastReadIFrame)
break; // automatically stop at end of recording
}
else if (Index <= 0 || SwitchToPlayFrame && Index >= SwitchToPlayFrame)
SwitchToPlay = true;
if (SwitchToPlay) {
if (!SwitchToPlayFrame)
Empty();
DevicePlay();
playMode = pmPlay;
playDir = pdForward;
SwitchToPlayFrame = 0;
}
}
}
}
cNonBlockingFileReader *nbfr = nonBlockingFileReader;
nonBlockingFileReader = NULL;
delete nbfr;
}
void cDvbPlayer::Pause(void)
{
if (playMode == pmPause || playMode == pmStill)
Play();
else {
LOCK_THREAD;
if (playMode == pmFast || (playMode == pmSlow && playDir == pdBackward)) {
if (!(DeviceHasIBPTrickSpeed() && playDir == pdForward))
Empty();
}
DeviceFreeze();
playMode = pmPause;
}
}
void cDvbPlayer::Play(void)
{
if (playMode != pmPlay) {
LOCK_THREAD;
if (playMode == pmStill || playMode == pmFast || (playMode == pmSlow && playDir == pdBackward)) {
if (!(DeviceHasIBPTrickSpeed() && playDir == pdForward))
Empty();
}
DevicePlay();
playMode = pmPlay;
playDir = pdForward;
}
}
void cDvbPlayer::Forward(void)
{
if (index) {
switch (playMode) {
case pmFast:
if (Setup.MultiSpeedMode) {
TrickSpeed(playDir == pdForward ? 1 : -1);
break;
}
else if (playDir == pdForward) {
Play();
break;
}
// run into pmPlay
case pmPlay: {
LOCK_THREAD;
if (!(DeviceHasIBPTrickSpeed() && playDir == pdForward))
Empty();
if (DeviceIsPlayingVideo())
DeviceMute();
playMode = pmFast;
playDir = pdForward;
trickSpeed = NORMAL_SPEED;
TrickSpeed(Setup.MultiSpeedMode ? 1 : MAX_SPEEDS);
}
break;
case pmSlow:
if (Setup.MultiSpeedMode) {
TrickSpeed(playDir == pdForward ? -1 : 1);
break;
}
else if (playDir == pdForward) {
Pause();
break;
}
Empty();
// run into pmPause
case pmStill:
case pmPause:
DeviceMute();
playMode = pmSlow;
playDir = pdForward;
trickSpeed = NORMAL_SPEED;
TrickSpeed(Setup.MultiSpeedMode ? -1 : -MAX_SPEEDS);
break;
default: esyslog("ERROR: unknown playMode %d (%s)", playMode, __FUNCTION__);
}
}
}
void cDvbPlayer::Backward(void)
{
if (index) {
switch (playMode) {
case pmFast:
if (Setup.MultiSpeedMode) {
TrickSpeed(playDir == pdBackward ? 1 : -1);
break;
}
else if (playDir == pdBackward) {
Play();
break;
}
// run into pmPlay
case pmPlay: {
LOCK_THREAD;
Empty();
if (DeviceIsPlayingVideo())
DeviceMute();
playMode = pmFast;
playDir = pdBackward;
trickSpeed = NORMAL_SPEED;
TrickSpeed(Setup.MultiSpeedMode ? 1 : MAX_SPEEDS);
}
break;
case pmSlow:
if (Setup.MultiSpeedMode) {
TrickSpeed(playDir == pdBackward ? -1 : 1);
break;
}
else if (playDir == pdBackward) {
Pause();
break;
}
Empty();
// run into pmPause
case pmStill:
case pmPause: {
LOCK_THREAD;
Empty();
DeviceMute();
playMode = pmSlow;
playDir = pdBackward;
trickSpeed = NORMAL_SPEED;
TrickSpeed(Setup.MultiSpeedMode ? -1 : -MAX_SPEEDS);
}
break;
default: esyslog("ERROR: unknown playMode %d (%s)", playMode, __FUNCTION__);
}
}
}
int cDvbPlayer::SkipFrames(int Frames)
{
if (index && Frames) {
int Current, Total;
GetIndex(Current, Total, true);
int OldCurrent = Current;
// As GetNextIFrame() increments/decrements at least once, the
// destination frame (= Current + Frames) must be adjusted by
// -1/+1 respectively.
Current = index->GetNextIFrame(Current + Frames + (Frames > 0 ? -1 : 1), Frames > 0);
return Current >= 0 ? Current : OldCurrent;
}
return -1;
}
void cDvbPlayer::SkipSeconds(int Seconds)
{
if (index && Seconds) {
LOCK_THREAD;
int Index = ptsIndex.FindIndex(DeviceGetSTC());
Empty();
if (Index >= 0) {
Index = max(Index + SecondsToFrames(Seconds, framesPerSecond), 0);
if (Index > 0)
Index = index->GetNextIFrame(Index, false, NULL, NULL, NULL);
if (Index >= 0)
readIndex = Index - 1; // Action() will first increment it!
}
Play();
}
}
void cDvbPlayer::Goto(int Index, bool Still)
{
if (index) {
LOCK_THREAD;
Empty();
if (++Index <= 0)
Index = 1; // not '0', to allow GetNextIFrame() below to work!
uint16_t FileNumber;
off_t FileOffset;
int Length;
Index = index->GetNextIFrame(Index, false, &FileNumber, &FileOffset, &Length);
if (Index >= 0 && NextFile(FileNumber, FileOffset) && Still) {
uchar b[MAXFRAMESIZE];
int r = ReadFrame(replayFile, b, Length, sizeof(b));
if (r > 0) {
if (playMode == pmPause)
DevicePlay();
DeviceStillPicture(b, r);
ptsIndex.Put(isPesRecording ? PesGetPts(b) : TsGetPts(b, r), Index);
}
playMode = pmStill;
}
readIndex = Index;
}
}
bool cDvbPlayer::GetIndex(int &Current, int &Total, bool SnapToIFrame)
{
if (index) {
Current = ptsIndex.FindIndex(DeviceGetSTC());
if (SnapToIFrame) {
int i1 = index->GetNextIFrame(Current + 1, false);
int i2 = index->GetNextIFrame(Current, true);
Current = (abs(Current - i1) <= abs(Current - i2)) ? i1 : i2;
}
Total = index->Last();
return true;
}
Current = Total = -1;
return false;
}
bool cDvbPlayer::GetReplayMode(bool &Play, bool &Forward, int &Speed)
{
Play = (playMode == pmPlay || playMode == pmFast);
Forward = (playDir == pdForward);
if (playMode == pmFast || playMode == pmSlow)
Speed = Setup.MultiSpeedMode ? abs(trickSpeed - NORMAL_SPEED) : 0;
else
Speed = -1;
return true;
}
// --- cDvbPlayerControl -----------------------------------------------------
cDvbPlayerControl::cDvbPlayerControl(const char *FileName, bool PauseLive)
:cControl(player = new cDvbPlayer(FileName, PauseLive))
{
}
cDvbPlayerControl::~cDvbPlayerControl()
{
Stop();
}
bool cDvbPlayerControl::Active(void)
{
return player && player->Active();
}
void cDvbPlayerControl::Stop(void)
{
delete player;
player = NULL;
}
void cDvbPlayerControl::Pause(void)
{
if (player)
player->Pause();
}
void cDvbPlayerControl::Play(void)
{
if (player)
player->Play();
}
void cDvbPlayerControl::Forward(void)
{
if (player)
player->Forward();
}
void cDvbPlayerControl::Backward(void)
{
if (player)
player->Backward();
}
void cDvbPlayerControl::SkipSeconds(int Seconds)
{
if (player)
player->SkipSeconds(Seconds);
}
int cDvbPlayerControl::SkipFrames(int Frames)
{
if (player)
return player->SkipFrames(Frames);
return -1;
}
bool cDvbPlayerControl::GetIndex(int &Current, int &Total, bool SnapToIFrame)
{
if (player) {
player->GetIndex(Current, Total, SnapToIFrame);
return true;
}
return false;
}
bool cDvbPlayerControl::GetReplayMode(bool &Play, bool &Forward, int &Speed)
{
return player && player->GetReplayMode(Play, Forward, Speed);
}
void cDvbPlayerControl::Goto(int Position, bool Still)
{
if (player)
player->Goto(Position, Still);
}