void FileWriterSync::seek(long long position, ExceptionCode& ec)
{
ASSERT(writer());
ASSERT(m_complete);
ec = 0;
seekInternal(position);
}
void
ScaleSliderQWidget::mouseMoveEvent(QMouseEvent* e)
{
if (!_imp->readOnly) {
QPoint newClick = e->pos();
QPointF newClick_opengl = _imp->zoomCtx.toZoomCoordinates( newClick.x(),newClick.y() );
double v = _imp->dataType == eDataTypeInt ? std::floor(newClick_opengl.x() + 0.5) : newClick_opengl.x();
seekInternal(v);
}
}
void FileWriter::seek(long long position, ExceptionCode& ec)
{
ASSERT(writer());
if (m_readyState == WRITING) {
setError(FileError::INVALID_STATE_ERR, ec);
return;
}
ASSERT(m_truncateLength == -1);
ASSERT(m_queuedOperation == OperationNone);
seekInternal(position);
}
void FileWriter::seek(long long position, ExceptionCode& ec)
{
ASSERT(writer());
if (m_readyState == WRITING) {
setError(FileError::INVALID_STATE_ERR, ec);
return;
}
m_bytesWritten = 0;
m_bytesToWrite = 0;
seekInternal(position);
}
void BufferedIndexInput::seek(const int64_t pos) {
if ( pos < 0 )
_CLTHROWA(CL_ERR_IO, "IO Argument Error. Value must be a positive value.");
if (pos >= bufferStart && pos < (bufferStart + bufferLength))
bufferPosition = (int32_t)(pos - bufferStart); // seek within buffer
else {
bufferStart = pos;
bufferPosition = 0;
bufferLength = 0; // trigger refill() on read()
seekInternal(pos);
}
}
void
ScaleSliderQWidget::mouseMoveEvent(QMouseEvent* e)
{
if (!_imp->readOnly) {
QPoint newClick = e->pos();
QPointF newClick_opengl = _imp->zoomCtx.toZoomCoordinates( newClick.x(), newClick.y() );
double v = _imp->dataType == eDataTypeInt ? std::floor(newClick_opengl.x() + 0.5) : newClick_opengl.x();
if (_imp->gui && _imp->allowDraftModeSetting) {
_imp->gui->setDraftRenderEnabled(true);
}
seekInternal(v);
}
}
void BufferedIndexInput::readBytes(uint8_t* b, const int32_t len){
if (len < bufferSize) {
for (int32_t i = 0; i < len; ++i) // read byte-by-byte
b[i] = readByte();
} else { // read all-at-once
int64_t start = getFilePointer();
seekInternal(start);
readInternal(b, len);
bufferStart = start + len; // adjust stream variables
bufferPosition = 0;
bufferLength = 0; // trigger refill() on read
}
}
void
ScaleSliderQWidget::mousePressEvent(QMouseEvent* e)
{
if (!_imp->readOnly) {
if ( modifierHasControl(e) ) {
Q_EMIT resetToDefaultRequested();
} else {
QPoint newClick = e->pos();
_imp->oldClick = newClick;
QPointF newClick_opengl = _imp->zoomCtx.toZoomCoordinates( newClick.x(), newClick.y() );
double v = _imp->dataType == eDataTypeInt ? std::floor(newClick_opengl.x() + 0.5) : newClick_opengl.x();
seekInternal(v);
}
}
QWidget::mousePressEvent(e);
}
/**
* 读多个字节
*/
void CIndexInput::readBytes(byte* b,size_t len)
{
if (len < m_bufferSize)
{
for (size_t i = 0; i < len; i++)
// read byte-by-byte
b[i] = (byte) readByte();
}
else
{
// read all-at-once
int64_t start = getFilePointer();
seekInternal(start);
readInternal((char*)b,len);
m_bufferStart = start + len; // adjust stream variables
m_bufferPosition = 0;
m_bufferLength = 0; // trigger refill() on read
}
}
bool seek(double ts){
// if the video is currently playing,
// pause it temporarily during seeking so that
// not frames aren't dropped because of lost time during seeking
bool tmpPause = !timeHandler->GetPaused();
if(tmpPause){
audioDevice->SetPaused(true);
timeHandler->Pause();
}
bool ret = seekInternal(ts, 0);
if(tmpPause){
audioDevice->SetPaused(false);
timeHandler->Play();
}
return ret;
}
void FileWriterSync::seek(long long position, ExceptionState& exceptionState)
{
ASSERT(writer());
ASSERT(m_complete);
seekInternal(position);
}
bool seekInternal(double t, int depth)
{
ResetRetries();
emptyFrameQueue();
audioHandler->clearQueue();
int64_t firstTs = getFirstSeekTs();
double backSeek = (double)depth * 2.0f + 1.0f;
int64_t minTs = tsFromTime(t - backSeek - 2.5) + firstTs;
int64_t ts = tsFromTime(t - backSeek) + firstTs;
int64_t maxTs = tsFromTime(t - backSeek) + firstTs;
// There is no discernible way to determine if negative timestamps are allowed
// (or even required) to seek to low timestamps.
// On some files you must seek to negative timestamps to be able to seek to 0
// but on other files you get weird results from seeking to below 0.
// So, every other try, we will allow seeking to negative timestamps.
if((depth % 2) == 1){
minTs = std::max((int64_t)0, minTs);
ts = std::max((int64_t)0, minTs);
maxTs = std::max((int64_t)0, minTs);
}
FlogD("Trying to seek to minTs: " << minTs << " ts: " << ts << " maxTs: " << maxTs << " with firsTs: " << firstTs);
int flags = 0;
if(ts < pFormatCtx->streams[videoStream]->cur_dts)
flags |= AVSEEK_FLAG_BACKWARD;
int seekRet = avformat_seek_file(pFormatCtx, videoStream, minTs, ts, maxTs, flags);
if(seekRet > 0){
FlogD("avformat_seek_file failed, returned " << seekRet);
return false;
}
avcodec_flush_buffers(pCodecCtx);
double newTime = t + timeFromTs(firstPts);
double actualTime = skipToTs(newTime);
// consider the seek failed and try again if the actual time diffs more than .5 seconds
// from the desired new time.
FlogD("wanted to seek to " << newTime << " and ended up at " << actualTime);
bool ret = true;
if(fabsf(newTime - actualTime) > .5){
if(depth < 5){
FlogD("not good enough, trying again");
return seekInternal(t, depth + 1);
}
else{
ret = false;
FlogW("seek failed, wanted to seek to " << newTime << " and ended up at " << actualTime);
}
}
timeHandler->SetTime(actualTime);
stepIntoQueue = true;
audioHandler->onSeek();
return ret;
}