bool SubtitleStream::fastForward(sf::Time targetPosition)
{
while(hasPackets())
{
onGetData();
}
std::list< std::shared_ptr<SubtitleData>>::iterator it = m_visibleSubtitles.begin();
while (it != m_visibleSubtitles.end())
{
//erase subs that are deleted before the targetPosition
if (it->get()->end<targetPosition)
it = m_visibleSubtitles.erase(it);
else
++it;
}
it = m_pendingSubtitles.begin();
while (it != m_pendingSubtitles.end())
{
//erase subs that are deleted before the targetPosition
if (it->get()->end<targetPosition)
it = m_pendingSubtitles.erase(it);
else
++it;
}
return true;
}
bool SoundStream::fillAndPushBuffer(unsigned int bufferNum, bool immediateLoop)
{
bool requestStop = false;
// Acquire audio data, also address EOF and error cases if they occur
Chunk data = {NULL, 0};
for (Uint32 retryCount = 0; !onGetData(data) && (retryCount < BufferRetries); ++retryCount)
{
// Mark the buffer as the last one (so that we know when to reset the playing position)
m_endBuffers[bufferNum] = true;
// Check if the stream must loop or stop
if (!m_loop)
{
// Not looping: request stop
requestStop = true;
break;
}
// Return to the beginning of the stream source
onSeek(Time::Zero);
// If we got data, break and process it, else try to fill the buffer once again
if (data.samples && data.sampleCount)
break;
// If immediateLoop is specified, we have to immediately adjust the sample count
if (immediateLoop)
{
// We just tried to begin preloading at EOF: reset the sample count
m_samplesProcessed = 0;
m_endBuffers[bufferNum] = false;
}
// We're a looping sound that got no data, so we retry onGetData()
}
// Fill the buffer if some data was returned
if (data.samples && data.sampleCount)
{
unsigned int buffer = m_buffers[bufferNum];
// Fill the buffer
ALsizei size = static_cast<ALsizei>(data.sampleCount) * sizeof(Int16);
alCheck(alBufferData(buffer, m_format, data.samples, size, m_sampleRate));
// Push it into the sound queue
alCheck(alSourceQueueBuffers(m_source, 1, &buffer));
}
else
{
// If we get here, we most likely ran out of retries
requestStop = true;
}
return requestStop;
}
bool SoundStream::fillAndPushBuffer(unsigned int bufferNum)
{
bool requestStop = false;
// Acquire audio data
Chunk data = {NULL, 0};
if (!onGetData(data))
{
// Mark the buffer as the last one (so that we know when to reset the playing position)
m_endBuffers[bufferNum] = true;
// Check if the stream must loop or stop
if (m_loop)
{
// Return to the beginning of the stream source
onSeek(Time::Zero);
// If we previously had no data, try to fill the buffer once again
if (!data.samples || (data.sampleCount == 0))
{
return fillAndPushBuffer(bufferNum);
}
}
else
{
// Not looping: request stop
requestStop = true;
}
}
// Fill the buffer if some data was returned
if (data.samples && data.sampleCount)
{
unsigned int buffer = m_buffers[bufferNum];
// Fill the buffer
ALsizei size = static_cast<ALsizei>(data.sampleCount) * sizeof(Int16);
alCheck(alBufferData(buffer, m_format, data.samples, size, m_sampleRate));
// Push it into the sound queue
alCheck(alSourceQueueBuffers(m_source, 1, &buffer));
}
return requestStop;
}
void SubtitleStream::update()
{
//only get new subtitles if we are running low
if (m_status == Playing && hasPackets())
{
if (!onGetData())
setStatus(Stopped);
}
if (!m_pendingSubtitles.empty())
{
//activate subtitle
if (m_pendingSubtitles.front()->start < m_timer->getOffset())
{
std::shared_ptr<SubtitleData> iter = m_pendingSubtitles.front();
m_delegate.didUpdateSubtitle(*this, iter->sprites, iter->positions);
m_visibleSubtitles.push_back(iter);
m_pendingSubtitles.pop_front();
}
}
if (!m_visibleSubtitles.empty())
{
//remove subtitle
if (m_visibleSubtitles.front()->end < m_timer->getOffset())
{
std::shared_ptr<SubtitleData> subtitle = m_visibleSubtitles.front();
m_visibleSubtitles.pop_front();
if (m_visibleSubtitles.empty())
{
m_delegate.didWipeOutSubtitles(*this);
}
}
}
}
