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vdr/dvbplayer.c
Klaus Schmidinger eb52e3004a Version 1.3.11 
- In order to avoid problems on NPTL systems, VDR now checks for the presence
  of NPTL at program start, and if it is, exits and tells the user to do
  'export LD_ASSUME_KERNEL=2.4.1' before starting VDR.
- Revisited the "Fixed missing audio after replaying a DVD" change because it
  introduced a sound disturbance when switching between channels on the same
  transponder (thanks to Marco Schlüßler).
- In order to avoid problems on UTF-8 systems, VDR now checks for the presence
  of UTF-8 at program start, and if it is, exits and tells the user to turn off
  UTF-8 before starting VDR (thanks to Ludwig Nussel for pointing out a problem
  with systems that are set to use UTF-8). There are also problems in case the
  video partition is mounted with "iocharset=utf8" (thanks to Jörg Knitter for
  reporting this one).
  Please also read the "IMPORTANT NOTES" section in the INSTALL file!
- Some changes to the SPU decoder interface (thanks to Sven Goethel).
- Some improvements in cOsd creation (thanks to some suggestions by Jouni Karvo).
- Fixed calculating the OSD width and height (thanks to Olaf Henkel for reporting
  a problem with long event texts in the "Classic VDR" skin).
- Fixed switching channels while an encrypted channel is being recorded, because the
  channel was switched if the new channel was on the same transponder and was
  a radio channel or an unencrypted channel (thanks to Martin Dauskardt for reporting
  this one).
- No longer using the external 'find' command to scan the video directory for
  recordings (based on a suggestion by Mirko Dölle).
- The list of recordings is now kept statically in memory to avoid long delays
  when opening the "Recordings" menu. As a side effect, external modifications to
  the video directory are no longer immediately reflected in the "Recordings" menu.
  If a plugin manipulates the video directory in any way, it can call the function
  Recordings.TriggerUpdate() to trigger an update of the list of recordings.
  If some external tool manipulates the video directory, it can touch the file
  '.update' in the video directory to trigger an update of the list of recordings.
- Fixed a memory leak in theme description handling (thanks to Sascha Volkenandt).
- Added cDevice::Flush() to make sure that all data in the video card's buffers
  has been processed (thanks to Reinhard Nissl). Currently this is not yet actually
  implemented for FF DVB cards.
- Fixed handling the color button texts in cMenuEditStrItem (thanks to Maynard
  Cedric for reporting this one).
- Fixed the description of cRingBufferLinear (thanks to Ludwig Nussel for pointing
  out this one).
- Fixed cRingBufferLinear::Get() in case the buffer wraps around (thanks to Ludwig
  Nussel for reporting this one).
2004-06-19 18:00:00 +02:00

866 lines
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/*
* dvbplayer.c: The DVB player
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: dvbplayer.c 1.24 2004/06/19 08:55:49 kls Exp $
*/
#include "dvbplayer.h"
#include <stdlib.h>
#include "recording.h"
#include "remux.h"
#include "ringbuffer.h"
#include "thread.h"
#include "tools.h"
// --- cBackTrace ----------------------------------------------------------
#define AVG_FRAME_SIZE 15000 // an assumption about the average frame size
#define DVB_BUF_SIZE (256 * 1024) // an assumption about the dvb firmware buffer size
#define BACKTRACE_ENTRIES (DVB_BUF_SIZE / AVG_FRAME_SIZE + 20) // how many entries are needed to backtrace buffer contents
class cBackTrace {
private:
int index[BACKTRACE_ENTRIES];
int length[BACKTRACE_ENTRIES];
int pos, num;
public:
cBackTrace(void);
void Clear(void);
void Add(int Index, int Length);
int Get(bool Forward);
};
cBackTrace::cBackTrace(void)
{
Clear();
}
void cBackTrace::Clear(void)
{
pos = num = 0;
}
void cBackTrace::Add(int Index, int Length)
{
index[pos] = Index;
length[pos] = Length;
if (++pos >= BACKTRACE_ENTRIES)
pos = 0;
if (num < BACKTRACE_ENTRIES)
num++;
}
int cBackTrace::Get(bool Forward)
{
int p = pos;
int n = num;
int l = DVB_BUF_SIZE + (Forward ? 0 : 256 * 1024); //XXX (256 * 1024) == DVB_BUF_SIZE ???
int i = -1;
while (n && l > 0) {
if (--p < 0)
p = BACKTRACE_ENTRIES - 1;
i = index[p] - 1;
l -= length[p];
n--;
}
return i;
}
// --- cNonBlockingFileReader ------------------------------------------------
class cNonBlockingFileReader : public cThread {
private:
int f;
uchar *buffer;
int wanted;
int length;
bool hasData;
bool active;
cMutex mutex;
cCondVar newSet;
protected:
void Action(void);
public:
cNonBlockingFileReader(void);
~cNonBlockingFileReader();
void Clear(void);
int Read(int FileHandle, uchar *Buffer, int Length);
bool Reading(void) { return buffer; }
};
cNonBlockingFileReader::cNonBlockingFileReader(void)
:cThread("non blocking file reader")
{
f = -1;
buffer = NULL;
wanted = length = 0;
hasData = false;
active = false;
Start();
}
cNonBlockingFileReader::~cNonBlockingFileReader()
{
active = false;
newSet.Broadcast();
Cancel(3);
free(buffer);
}
void cNonBlockingFileReader::Clear(void)
{
cMutexLock MutexLock(&mutex);
f = -1;
free(buffer);
buffer = NULL;
wanted = length = 0;
hasData = false;
newSet.Broadcast();
}
int cNonBlockingFileReader::Read(int FileHandle, uchar *Buffer, int Length)
{
if (hasData && buffer) {
if (buffer != Buffer) {
esyslog("ERROR: cNonBlockingFileReader::Read() called with different buffer!");
errno = EINVAL;
return -1;
}
buffer = NULL;
return length;
}
if (!buffer) {
f = FileHandle;
buffer = Buffer;
wanted = Length;
length = 0;
hasData = false;
newSet.Broadcast();
}
errno = EAGAIN;
return -1;
}
void cNonBlockingFileReader::Action(void)
{
active = true;
while (active) {
cMutexLock MutexLock(&mutex);
if (!hasData && f >= 0 && buffer) {
int r = safe_read(f, buffer + length, wanted - length);
if (r >= 0) {
length += r;
if (!r || length == wanted) // r == 0 means EOF
hasData = true;
}
else if (r < 0 && FATALERRNO) {
LOG_ERROR;
length = r; // this will forward the error status to the caller
hasData = true;
}
}
newSet.TimedWait(mutex, 1000);
}
}
// --- cDvbPlayer ------------------------------------------------------------
//XXX+ also used in recorder.c - find a better place???
// The size of the array used to buffer video data:
// (must be larger than MINVIDEODATA - see remux.h)
#define VIDEOBUFSIZE MEGABYTE(1)
// The number of frames to back up when resuming an interrupted replay session:
#define RESUMEBACKUP (10 * FRAMESPERSEC)
class cDvbPlayer : public cPlayer, cThread {
private:
enum ePlayModes { pmPlay, pmPause, pmSlow, pmFast, pmStill };
enum ePlayDirs { pdForward, pdBackward };
static int Speeds[];
cNonBlockingFileReader *nonBlockingFileReader;
cRingBufferFrame *ringBuffer;
cBackTrace *backTrace;
cFileName *fileName;
cIndexFile *index;
int replayFile;
bool eof;
bool active;
bool running;
bool firstPacket;
ePlayModes playMode;
ePlayDirs playDir;
int trickSpeed;
int readIndex, writeIndex;
bool canToggleAudioTrack;
uchar audioTrack;
cFrame *readFrame;
cFrame *playFrame;
void TrickSpeed(int Increment);
void Empty(void);
void StripAudioPackets(uchar *b, int Length, uchar Except = 0x00);
bool NextFile(uchar FileNumber = 0, int FileOffset = -1);
int Resume(void);
bool Save(void);
protected:
virtual void Activate(bool On);
virtual void Action(void);
public:
cDvbPlayer(const char *FileName);
virtual ~cDvbPlayer();
bool Active(void) { return active; }
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 bool GetIndex(int &Current, int &Total, bool SnapToIFrame = false);
virtual bool GetReplayMode(bool &Play, bool &Forward, int &Speed);
virtual int NumAudioTracks(void) const;
virtual const char **GetAudioTracks(int *CurrentTrack = NULL) const;
virtual void SetAudioTrack(int Index);
};
#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)
:cThread("dvbplayer")
{
nonBlockingFileReader = NULL;
ringBuffer = NULL;
backTrace = NULL;
index = NULL;
eof = false;
active = true;
running = false;
firstPacket = true;
playMode = pmPlay;
playDir = pdForward;
trickSpeed = NORMAL_SPEED;
canToggleAudioTrack = false;
audioTrack = 0xC0;
readIndex = writeIndex = -1;
readFrame = NULL;
playFrame = NULL;
isyslog("replay %s", FileName);
fileName = new cFileName(FileName, false);
replayFile = fileName->Open();
if (replayFile < 0)
return;
ringBuffer = new cRingBufferFrame(VIDEOBUFSIZE);
// Create the index file:
index = new cIndexFile(FileName, false);
if (!index)
esyslog("ERROR: can't allocate index");
else if (!index->Ok()) {
delete index;
index = NULL;
}
backTrace = new cBackTrace;
}
cDvbPlayer::~cDvbPlayer()
{
Detach();
Save();
delete index;
delete fileName;
delete backTrace;
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 ((readIndex = backTrace->Get(playDir == pdForward)) < 0)
readIndex = writeIndex;
readFrame = NULL;
playFrame = NULL;
ringBuffer->Clear();
backTrace->Clear();
DeviceClear();
firstPacket = true;
}
void cDvbPlayer::StripAudioPackets(uchar *b, int Length, uchar Except)
{
if (index) {
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 (Except)
PlayAudio(&b[i], l);
// continue with deleting the data - otherwise it disturbs DVB replay
case 0xC0 ... 0xC1: // audio
if (c == 0xC1)
canToggleAudioTrack = true;
if (!Except || c != Except)
memset(&b[i], 0x00, min(l, Length-i));
break;
case 0xE0 ... 0xEF: // video
break;
default:
//esyslog("ERROR: unexpected packet id %02X", c);
l = 0;
}
if (l)
i += l - 1; // the loop increments, too!
}
/*XXX
else
esyslog("ERROR: broken packet header");
XXX*/
}
}
}
bool cDvbPlayer::NextFile(uchar FileNumber, int FileOffset)
{
if (FileNumber > 0)
replayFile = fileName->SetOffset(FileNumber, FileOffset);
else if (replayFile >= 0 && eof)
replayFile = fileName->NextFile();
eof = false;
return replayFile >= 0;
}
int cDvbPlayer::Resume(void)
{
if (index) {
int Index = index->GetResume();
if (Index >= 0) {
uchar FileNumber;
int FileOffset;
if (index->Get(Index, &FileNumber, &FileOffset) && NextFile(FileNumber, FileOffset))
return Index;
}
}
return -1;
}
bool cDvbPlayer::Save(void)
{
if (index) {
int Index = writeIndex;
if (Index >= 0) {
Index -= RESUMEBACKUP;
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 >= 0)
Start();
}
else if (active) {
running = false;
Cancel(3);
active = false;
}
}
void cDvbPlayer::Action(void)
{
uchar *b = NULL;
uchar *p = NULL;
int pc = 0;
readIndex = Resume();
if (readIndex >= 0)
isyslog("resuming replay at index %d (%s)", readIndex, IndexToHMSF(readIndex, true));
nonBlockingFileReader = new cNonBlockingFileReader;
int Length = 0;
int AudioTrack = 0; // -1 = any, 0 = none, >0 = audioTrack
running = true;
while (running && (NextFile() || readIndex >= 0 || ringBuffer->Available() || !DeviceFlush(100))) {
cPoller Poller;
if (DevicePoll(Poller, 100)) {
LOCK_THREAD;
// Read the next frame from the file:
if (!readFrame && (replayFile >= 0 || readIndex >= 0)) {
if (playMode != pmStill) {
if (!nonBlockingFileReader->Reading()) {
if (playMode == pmFast || (playMode == pmSlow && playDir == pdBackward)) {
uchar FileNumber;
int FileOffset;
int Index = index->GetNextIFrame(readIndex, playDir == pdForward, &FileNumber, &FileOffset, &Length, true);
if (Index >= 0) {
if (!NextFile(FileNumber, FileOffset))
continue;
}
else {
// hit begin of recording: wait for device buffers to drain
// before changing play mode:
if (!DeviceFlush(100))
continue;
// can't call Play() here, because those functions may only be
// called from the foreground thread - and we also don't need
// to empty the buffer here
DevicePlay();
playMode = pmPlay;
playDir = pdForward;
continue;
}
readIndex = Index;
AudioTrack = 0;
// must clear all audio packets because the buffer is not emptied
// when falling back from "fast forward" to "play" (see above)
}
else if (index) {
uchar FileNumber;
int FileOffset;
readIndex++;
if (!(index->Get(readIndex, &FileNumber, &FileOffset, NULL, &Length) && NextFile(FileNumber, FileOffset))) {
readIndex = -1;
eof = true;
continue;
}
AudioTrack = audioTrack;
}
else { // allows replay even if the index file is missing
Length = MAXFRAMESIZE;
AudioTrack = -1;
}
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;
}
b = MALLOC(uchar, Length);
}
int r = nonBlockingFileReader->Read(replayFile, b, Length);
if (r > 0) {
if (AudioTrack == 0)
StripAudioPackets(b, r);
readFrame = new cFrame(b, -r, ftUnknown, readIndex); // hands over b to the ringBuffer
b = NULL;
}
else if (r == 0)
eof = true;
else if (r < 0 && FATALERRNO) {
LOG_ERROR;
break;
}
}
else//XXX
usleep(1); // this keeps the CPU load low
}
// Store the frame in the buffer:
if (readFrame) {
if (ringBuffer->Put(readFrame))
readFrame = 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 (firstPacket) {
cRemux::SetBrokenLink(p, pc);
firstPacket = false;
}
if (AudioTrack > 0)
StripAudioPackets(p, pc, AudioTrack);
}
}
if (p) {
int w = PlayVideo(p, pc);
if (w > 0) {
p += w;
pc -= w;
}
else if (w < 0 && FATALERRNO) {
LOG_ERROR;
break;
}
}
if (pc == 0) {
writeIndex = playFrame->Index();
backTrace->Add(playFrame->Index(), playFrame->Count());
ringBuffer->Drop(playFrame);
playFrame = NULL;
p = NULL;
}
}
}
}
active = running = false;
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))
Empty();
DeviceFreeze();
playMode = pmPause;
}
}
void cDvbPlayer::Play(void)
{
if (playMode != pmPlay) {
LOCK_THREAD;
if (playMode == pmStill || playMode == pmFast || (playMode == pmSlow && playDir == pdBackward))
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;
Empty();
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;
}
// run into pmPause
case pmStill:
case pmPause:
DeviceMute();
playMode = pmSlow;
playDir = pdForward;
trickSpeed = NORMAL_SPEED;
TrickSpeed(Setup.MultiSpeedMode ? -1 : -MAX_SPEEDS);
break;
}
}
}
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();
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;
}
// 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;
}
}
}
int cDvbPlayer::SkipFrames(int Frames)
{
if (index && Frames) {
int Current, Total;
GetIndex(Current, Total, true);
int OldCurrent = Current;
Current = index->GetNextIFrame(Current + Frames, Frames > 0);
return Current >= 0 ? Current : OldCurrent;
}
return -1;
}
void cDvbPlayer::SkipSeconds(int Seconds)
{
if (index && Seconds) {
LOCK_THREAD;
Empty();
int Index = writeIndex;
if (Index >= 0) {
Index = max(Index + Seconds * FRAMESPERSEC, 0);
if (Index > 0)
Index = index->GetNextIFrame(Index, false, NULL, NULL, NULL, true);
if (Index >= 0)
readIndex = writeIndex = 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!
uchar FileNumber;
int FileOffset, 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();
StripAudioPackets(b, r);
DeviceStillPicture(b, r);
}
playMode = pmStill;
}
readIndex = writeIndex = Index;
}
}
bool cDvbPlayer::GetIndex(int &Current, int &Total, bool SnapToIFrame)
{
if (index) {
if (playMode == pmStill)
Current = max(readIndex, 0);
else {
Current = max(writeIndex, 0);
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;
}
int cDvbPlayer::NumAudioTracks(void) const
{
return canToggleAudioTrack ? 2 : 1;
}
const char **cDvbPlayer::GetAudioTracks(int *CurrentTrack) const
{
if (NumAudioTracks()) {
if (CurrentTrack)
*CurrentTrack = (audioTrack == 0xC0) ? 0 : 1;
static const char *audioTracks1[] = { "Audio 1", NULL };
static const char *audioTracks2[] = { "Audio 1", "Audio 2", NULL };
return NumAudioTracks() > 1 ? audioTracks2 : audioTracks1;
}
return NULL;
}
void cDvbPlayer::SetAudioTrack(int Index)
{
if ((audioTrack == 0xC0) != (Index == 0)) {
audioTrack = (Index == 1) ? 0xC1 : 0xC0;
Empty();
}
}
// --- cDvbPlayerControl -----------------------------------------------------
cDvbPlayerControl::cDvbPlayerControl(const char *FileName)
:cControl(player = new cDvbPlayer(FileName))
{
}
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);
}
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