void
ProducerNode::BufferProducer()
{
// this thread produces one buffer each two seconds,
// and shedules it to be handled one second later than produced
// assuming a realtime timesource
status_t rv;
for (;;) {
rv = acquire_sem_etc(mBufferProducerSem,1,B_RELATIVE_TIMEOUT,DELAY);
if (rv == B_INTERRUPTED) {
continue;
} else if (rv == B_OK) {
// triggered by AdditionalBufferRequested
release_sem(mBufferProducerSem);
} else if (rv != B_TIMED_OUT) {
// triggered by deleting the semaphore (stop request)
break;
}
if (!mOutputEnabled)
continue;
BBuffer *buffer;
// out("ProducerNode: RequestBuffer\n");
buffer = mBufferGroup->RequestBuffer(2048);
if (!buffer) {
}
buffer->Header()->start_time = TimeSource()->Now() + DELAY / 2;
out("ProducerNode: SendBuffer, sheduled time = %5.4f\n",buffer->Header()->start_time / 1E6);
rv = SendBuffer(buffer, mOutput.destination);
if (rv != B_OK) {
}
}
}
bigtime_t
EqualizerNode::GetFilterLatency(void)
{
if (fOutputMedia.destination == media_destination::null)
return 0LL;
BBufferGroup* test_group =
new BBufferGroup(fOutputMedia.format.u.raw_audio.buffer_size, 1);
BBuffer* buffer =
test_group->RequestBuffer(fOutputMedia.format.u.raw_audio.buffer_size);
buffer->Header()->type = B_MEDIA_RAW_AUDIO;
buffer->Header()->size_used = fOutputMedia.format.u.raw_audio.buffer_size;
bigtime_t begin = system_time();
FilterBuffer(buffer);
bigtime_t latency = system_time() - begin;
buffer->Recycle();
delete test_group;
InitFilter();
return latency;
}
// figure processing latency by doing 'dry runs' of filterBuffer()
bigtime_t StepMotionBlurFilter::calcProcessingLatency() {
PRINT(("StepMotionBlurFilter::calcProcessingLatency()\n"));
if(m_output.destination == media_destination::null) {
PRINT(("\tNot connected.\n"));
return 0LL;
}
// allocate a temporary buffer group
BBufferGroup* pTestGroup = new BBufferGroup(m_output.format.u.raw_video.display.line_width * m_output.format.u.raw_video.display.line_count *4, 1);
// fetch a buffer
BBuffer* pBuffer = pTestGroup->RequestBuffer(m_output.format.u.raw_video.display.line_width * m_output.format.u.raw_video.display.line_count * 4);
ASSERT(pBuffer);
pBuffer->Header()->type = B_MEDIA_RAW_VIDEO;
pBuffer->Header()->size_used = m_output.format.u.raw_video.display.line_width * m_output.format.u.raw_video.display.line_count * 4;
// run the test
bigtime_t preTest = system_time();
filterBuffer(pBuffer);
bigtime_t elapsed = system_time()-preTest;
// clean up
pBuffer->Recycle();
delete pTestGroup;
// reset filter state
initFilter();
return elapsed;
}
// -------------------------------------------------------- //
// implementation for BMediaEventLooper
// -------------------------------------------------------- //
// protected:
status_t MediaReader::HandleBuffer(
const media_timed_event *event,
bigtime_t lateness,
bool realTimeEvent)
{
CALLED();
if (output.destination == media_destination::null)
return B_MEDIA_NOT_CONNECTED;
status_t status = B_OK;
BBuffer * buffer = fBufferGroup->RequestBuffer(output.format.u.multistream.max_chunk_size,fBufferPeriod);
if (buffer != 0) {
status = FillFileBuffer(buffer);
if (status != B_OK) {
PRINT("MediaReader::HandleEvent got an error from FillFileBuffer.\n");
buffer->Recycle();
} else {
if (fOutputEnabled) {
status = SendBuffer(buffer,output.destination);
if (status != B_OK) {
PRINT("MediaReader::HandleEvent got an error from SendBuffer.\n");
buffer->Recycle();
}
} else {
buffer->Recycle();
}
}
}
bigtime_t nextEventTime = event->event_time+fBufferPeriod;
media_timed_event nextBufferEvent(nextEventTime, BTimedEventQueue::B_HANDLE_BUFFER);
EventQueue()->AddEvent(nextBufferEvent);
return status;
}
void
ClientNode::_DataAvailable(bigtime_t time)
{
size_t samples = fFormat.u.raw_audio.buffer_size / sizeof(float);
fFramesSent += samples;
JackPortList* ports = fOwner->GetOutputPorts();
for (int i = 0; i < ports->CountItems(); i++) {
JackPort* port = ports->ItemAt(i);
if (port != NULL && port->IsConnected()) {
BBuffer* buffer = FillNextBuffer(time, port);
if (buffer) {
if (SendBuffer(buffer,
port->MediaOutput()->source, port->MediaOutput()->destination)
!= B_OK) {
printf("ClientNode::_DataAvailable: Buffer sending "
"failed\n");
buffer->Recycle();
}
size_t nFrames = fFormat.u.raw_audio.buffer_size
/ ((fFormat.u.raw_audio.format
& media_raw_audio_format::B_AUDIO_SIZE_MASK)
* fFormat.u.raw_audio.channel_count);
}
if (buffer == NULL)
return;
}
}
}
BBuffer*
SoundPlayNode::FillNextBuffer(bigtime_t eventTime)
{
CALLED();
// get a buffer from our buffer group
BBuffer* buffer = fBufferGroup->RequestBuffer(
fOutput.format.u.raw_audio.buffer_size, BufferDuration() / 2);
// If we fail to get a buffer (for example, if the request times out), we
// skip this buffer and go on to the next, to avoid locking up the control
// thread
if (buffer == NULL) {
ERROR("SoundPlayNode::FillNextBuffer: RequestBuffer failed\n");
return NULL;
}
if (fPlayer->HasData()) {
fPlayer->PlayBuffer(buffer->Data(),
fOutput.format.u.raw_audio.buffer_size, fOutput.format.u.raw_audio);
} else
memset(buffer->Data(), 0, fOutput.format.u.raw_audio.buffer_size);
// fill in the buffer header
media_header* header = buffer->Header();
header->type = B_MEDIA_RAW_AUDIO;
header->size_used = fOutput.format.u.raw_audio.buffer_size;
header->time_source = TimeSource()->ID();
header->start_time = eventTime;
return buffer;
}
// figure processing latency by doing 'dry runs' of filterBuffer()
bigtime_t FlangerNode::calcProcessingLatency() {
PRINT(("FlangerNode::calcProcessingLatency()\n"));
if(m_output.destination == media_destination::null) {
PRINT(("\tNot connected.\n"));
return 0LL;
}
// allocate a temporary buffer group
BBufferGroup* pTestGroup = new BBufferGroup(
m_output.format.u.raw_audio.buffer_size, 1);
// fetch a buffer
BBuffer* pBuffer = pTestGroup->RequestBuffer(
m_output.format.u.raw_audio.buffer_size);
ASSERT(pBuffer);
pBuffer->Header()->type = B_MEDIA_RAW_AUDIO;
pBuffer->Header()->size_used = m_output.format.u.raw_audio.buffer_size;
// run the test
bigtime_t preTest = system_time();
filterBuffer(pBuffer);
bigtime_t elapsed = system_time()-preTest;
// clean up
pBuffer->Recycle();
delete pTestGroup;
// reset filter state
initFilter();
return elapsed;
}
BINLINE void BMessageHeader::read(BBuffer& bbuf) {
bbuf.setByteOrder(BBIG_ENDIAN);
bool cmpr = bbuf.setCompressInteger(false);
bbuf.serialize(magic);
switch(magic) {
case BMAGIC_BINARY_STREAM:
break;
case BMAGIC_BINARY_STREAM_LE:
magic = BMAGIC_BINARY_STREAM;
bbuf.setByteOrder(BLITTLE_ENDIAN);
break;
default:
throw BException(BExceptionC::CORRUPT, L"Stream must start with BYPS or SPYB");
}
bbuf.serialize(error);
bbuf.serialize(flags);
if (flags & BHEADER_FLAG_BYPS_VERSION) {
bbuf.serialize(bversion);
}
bbuf.serialize(version);
targetId.serialize(bbuf, bversion);
bbuf.serialize(messageId);
bbuf.setCompressInteger(cmpr);
if (bversion >= BHEADER_BYPS_VERSION_WITH_SESSIONID) {
sessionId = BTargetId::readSessionId(bbuf);
}
}
void
FireWireDVNode::card_reader_thread()
{
status_t err;
size_t rbufsize;
int rcount;
fCard->GetBufInfo(&rbufsize, &rcount);
delete fBufferGroupEncVideo;
fBufferGroupEncVideo = new BBufferGroup(rbufsize, rcount);
while (!fTerminateThreads) {
void *data, *end;
ssize_t sizeUsed = fCard->Read(&data);
if (sizeUsed < 0) {
TRACE("FireWireDVNode::%s: %s\n", __FUNCTION__,
strerror(sizeUsed));
continue;
}
end = (char*)data + sizeUsed;
while (data < end) {
BBuffer* buf = fBufferGroupEncVideo->RequestBuffer(rbufsize, 10000);
if (!buf) {
TRACE("OutVideo: request buffer timout\n");
continue;
}
err = fCard->Extract(buf->Data(), &data, &sizeUsed);
if (err) {
buf->Recycle();
printf("OutVideo Extract error %s\n", strerror(err));
continue;
}
media_header* hdr = buf->Header();
hdr->type = B_MEDIA_ENCODED_VIDEO;
hdr->size_used = sizeUsed;
hdr->time_source = TimeSource()->ID(); // set time source id
//what should the start_time be?
hdr->start_time = TimeSource()->PerformanceTimeFor(system_time());
fLock.Lock();
if (SendBuffer(buf, fOutputEncVideo.source,
fOutputEncVideo.destination) != B_OK) {
TRACE("OutVideo: sending buffer failed\n");
buf->Recycle();
}
fLock.Unlock();
}
}
}
BBuffer*
GameProducer::FillNextBuffer(bigtime_t event_time)
{
// get a buffer from our buffer group
BBuffer* buf = fBufferGroup->RequestBuffer(fBufferSize, BufferDuration());
// if we fail to get a buffer (for example, if the request times out), we
// skip this buffer and go on to the next, to avoid locking up the control
// thread.
if (!buf)
return NULL;
// we need to discribe the buffer
int64 frames = int64(fBufferSize / fFrameSize);
memset(buf->Data(), 0, fBufferSize);
// now fill the buffer with data, continuing where the last buffer left off
fObject->Play(buf->Data(), frames);
// fill in the buffer header
media_header* hdr = buf->Header();
hdr->type = B_MEDIA_RAW_AUDIO;
hdr->size_used = fBufferSize;
hdr->time_source = TimeSource()->ID();
bigtime_t stamp;
if (RunMode() == B_RECORDING) {
// In B_RECORDING mode, we stamp with the capture time. We're not
// really a hardware capture node, but we simulate it by using the
// (precalculated) time at which this buffer "should" have been created.
stamp = event_time;
} else {
// okay, we're in one of the "live" performance run modes. in these
// modes, we stamp the buffer with the time at which the buffer should
// be rendered to the output, not with the capture time. fStartTime is
// the cached value of the first buffer's performance time; we calculate
// this buffer's performance time as an offset from that time, based on
// the amount of media we've created so far.
// Recalculating every buffer like this avoids accumulation of error.
stamp = fStartTime + bigtime_t(double(fFramesSent)
/ double(fOutput.format.u.raw_audio.frame_rate) * 1000000.0);
}
hdr->start_time = stamp;
return buf;
}
// figure processing latency by doing 'dry runs' of processBuffer()
bigtime_t AudioFilterNode::calcProcessingLatency() {
PRINT(("AudioFilterNode::calcProcessingLatency()\n"));
ASSERT(m_input.source != media_source::null);
ASSERT(m_output.destination != media_destination::null);
ASSERT(m_op);
// initialize filter
m_op->init();
size_t maxSize = max_c(
m_input.format.u.raw_audio.buffer_size,
m_output.format.u.raw_audio.buffer_size);
// allocate a temporary buffer group
BBufferGroup* testGroup = new BBufferGroup(
maxSize, 1);
// fetch a buffer big enough for in-place processing
BBuffer* buffer = testGroup->RequestBuffer(
maxSize, -1);
ASSERT(buffer);
buffer->Header()->type = B_MEDIA_RAW_AUDIO;
buffer->Header()->size_used = m_input.format.u.raw_audio.buffer_size;
// run the test
bigtime_t preTest = system_time();
processBuffer(buffer, buffer);
bigtime_t elapsed = system_time()-preTest;
// clean up
buffer->Recycle();
delete testGroup;
// reset filter state
m_op->init();
return elapsed;// + 100000LL;
}
void
AudioConsumer::HandleEvent(const media_timed_event *event,
bigtime_t late, bool realTimeEvent)
{
//printf("ClientNode::HandleEvent %d\n", event->type);
switch (event->type) {
case BTimedEventQueue::B_HANDLE_BUFFER:
{
printf("BTimedEventQueue::B_HANDLE_BUFFER\n");
if (RunState() == B_STARTED) {
// log latency
BBuffer* buffer = (BBuffer*)event->pointer;
buffer->Recycle();
}
break;
}
default:
break;
}
}
BBuffer*
ClientNode::FillNextBuffer(bigtime_t eventTime, JackPort* port)
{
//printf("FillNextBuffer\n");
BBuffer* buffer = port->CurrentBuffer();
media_header* header = buffer->Header();
header->type = B_MEDIA_RAW_AUDIO;
header->size_used = fFormat.u.raw_audio.buffer_size;
header->time_source = TimeSource()->ID();
bigtime_t start;
if (RunMode() == B_RECORDING)
start = eventTime;
else
start = fTime + bigtime_t(double(fFramesSent)
/ double(fFormat.u.raw_audio.frame_rate) * 1000000.0);
header->start_time = start;
return buffer;
}
status_t
ClientNode::_InitOutputPorts()
{
//printf("JackClient::_InitOutputPorts()\n");
JackPortList* outputPorts = fOwner->GetOutputPorts();
for (int i = 0; i < outputPorts->CountItems(); i++) {
JackPort* port = outputPorts->ItemAt(i);
if (!port->IsConnected())
return B_ERROR;
BBuffer* buffer = fBufferGroup->RequestBuffer(
fFormat.u.raw_audio.buffer_size);
if (buffer == NULL || buffer->Data() == NULL) {
printf("RequestBuffer failed\n");
return B_ERROR;
}
port->SetProcessingBuffer(buffer);
}
return B_OK;
}
BINLINE void BMessageHeader::write(BBuffer& bbuf) {
bool cmpr = bbuf.setCompressInteger(false);
bbuf.setByteOrder(byteOrder);
bbuf.serialize(magic);
bbuf.serialize(error);
bbuf.serialize(flags);
if (flags & BHEADER_FLAG_BYPS_VERSION) {
bbuf.serialize(bversion);
}
bbuf.serialize(version);
targetId.serialize(bbuf, bversion);
bbuf.serialize(messageId);
bbuf.setCompressInteger(cmpr);
if (bversion >= BHEADER_BYPS_VERSION_WITH_SESSIONID) {
BTargetId::writeSessionId(bbuf, sessionId);
}
}
// how should we handle late buffers? drop them?
// notify the producer?
status_t ESDSinkNode::HandleBuffer(
const media_timed_event *event,
bigtime_t lateness,
bool realTimeEvent)
{
CALLED();
BBuffer * buffer = const_cast<BBuffer*>((BBuffer*)event->pointer);
if (buffer == 0) {
fprintf(stderr,"<- B_BAD_VALUE\n");
return B_BAD_VALUE;
}
if(fInput.destination.id != buffer->Header()->destination) {
fprintf(stderr,"<- B_MEDIA_BAD_DESTINATION\n");
return B_MEDIA_BAD_DESTINATION;
}
media_header* hdr = buffer->Header();
bigtime_t now = TimeSource()->Now();
bigtime_t perf_time = hdr->start_time;
// the how_early calculate here doesn't include scheduling latency because
// we've already been scheduled to handle the buffer
bigtime_t how_early = perf_time - EventLatency() - now;
// if the buffer is late, we ignore it and report the fact to the producer
// who sent it to us
if ((RunMode() != B_OFFLINE) && // lateness doesn't matter in offline mode...
(RunMode() != B_RECORDING) && // ...or in recording mode
(how_early < 0LL))
{
//mLateBuffers++;
NotifyLateProducer(fInput.source, -how_early, perf_time);
fprintf(stderr," <- LATE BUFFER : %lli\n", how_early);
buffer->Recycle();
} else {
if (fDevice->CanSend())
fDevice->Write(buffer->Data(), buffer->SizeUsed());
}
return B_OK;
}
// _FrameGenerator
int32
VideoProducer::_FrameGenerator()
{
bool forceSendingBuffer = true;
bigtime_t lastFrameSentAt = 0;
bool running = true;
while (running) {
ldebug("VideoProducer: loop: %Ld\n", fFrame);
// lock the node manager
status_t err = fManager->LockWithTimeout(10000);
bool ignoreEvent = false;
// Data to be retrieved from the node manager.
bigtime_t performanceTime = 0;
bigtime_t nextPerformanceTime = 0;
bigtime_t waitUntil = 0;
bigtime_t nextWaitUntil = 0;
bigtime_t maxRenderTime = 0;
int32 playingDirection = 0;
int64 playlistFrame = 0;
switch (err) {
case B_OK: {
ldebug("VideoProducer: node manager successfully locked\n");
// get the times for the current and the next frame
performanceTime = fManager->TimeForFrame(fFrame);
nextPerformanceTime = fManager->TimeForFrame(fFrame + 1);
maxRenderTime = min_c(bigtime_t(33334 * 0.9),
max_c(fSupplier->ProcessingLatency(), maxRenderTime));
waitUntil = TimeSource()->RealTimeFor(fPerformanceTimeBase
+ performanceTime, 0) - maxRenderTime;
nextWaitUntil = TimeSource()->RealTimeFor(fPerformanceTimeBase
+ nextPerformanceTime, 0) - maxRenderTime;
// get playing direction and playlist frame for the current frame
bool newPlayingState;
playlistFrame = fManager->PlaylistFrameAtFrame(fFrame,
playingDirection,
newPlayingState);
ldebug("VideoProducer: performance time: %Ld, playlist frame: %Ld\n",
performanceTime, playlistFrame);
forceSendingBuffer |= newPlayingState;
fManager->SetCurrentVideoTime(nextPerformanceTime);
fManager->Unlock();
break;
}
case B_TIMED_OUT:
ldebug("VideoProducer: Couldn't lock the node manager.\n");
ignoreEvent = true;
waitUntil = system_time() - 1;
break;
default:
printf("Couldn't lock the node manager. Terminating video producer "
"frame generator thread.\n");
ignoreEvent = true;
waitUntil = system_time() - 1;
running = false;
break;
}
// Force sending a frame, if the last one has been sent more than
// one second ago.
if (lastFrameSentAt + 1000000 < performanceTime)
forceSendingBuffer = true;
ldebug("VideoProducer: waiting (%Ld)...\n", waitUntil);
// wait until...
err = acquire_sem_etc(fFrameSync, 1, B_ABSOLUTE_TIMEOUT, waitUntil);
// The only acceptable responses are B_OK and B_TIMED_OUT. Everything
// else means the thread should quit. Deleting the semaphore, as in
// VideoProducer::_HandleStop(), will trigger this behavior.
switch (err) {
case B_OK:
ldebug("VideoProducer::_FrameGenerator - going back to sleep.\n");
break;
case B_TIMED_OUT:
ldebug("VideoProducer: timed out => event\n");
// Catch the cases in which the node manager could not be
// locked and we therefore have no valid data to work with,
// or the producer is not running or enabled.
if (ignoreEvent || !fRunning || !fEnabled) {
ldebug("VideoProducer: ignore event\n");
// nothing to do
// Drop frame if it's at least a frame late.
} else if (nextWaitUntil < system_time()) {
//printf("VideoProducer: dropped frame (%ld)\n", fFrame);
if (fManager->LockWithTimeout(10000) == B_OK) {
fManager->FrameDropped();
fManager->Unlock();
}
// next frame
fFrame++;
// Send buffers only, if playing, the node is running and the
// output has been enabled
} else if (playingDirection != 0 || forceSendingBuffer) {
ldebug("VideoProducer: produce frame\n");
BAutolock _(fLock);
// Fetch a buffer from the buffer group
BBuffer *buffer = fUsedBufferGroup->RequestBuffer(
fConnectedFormat.display.bytes_per_row
* fConnectedFormat.display.line_count, 0LL);
if (buffer) {
// Fill out the details about this buffer.
media_header *h = buffer->Header();
h->type = B_MEDIA_RAW_VIDEO;
h->time_source = TimeSource()->ID();
h->size_used = fConnectedFormat.display.bytes_per_row
* fConnectedFormat.display.line_count;
// For a buffer originating from a device, you might
// want to calculate this based on the
// PerformanceTimeFor the time your buffer arrived at
// the hardware (plus any applicable adjustments).
h->start_time = fPerformanceTimeBase + performanceTime;
h->file_pos = 0;
h->orig_size = 0;
h->data_offset = 0;
h->u.raw_video.field_gamma = 1.0;
h->u.raw_video.field_sequence = fFrame;
h->u.raw_video.field_number = 0;
h->u.raw_video.pulldown_number = 0;
h->u.raw_video.first_active_line = 1;
h->u.raw_video.line_count
= fConnectedFormat.display.line_count;
// Fill in a frame
media_format mf;
mf.type = B_MEDIA_RAW_VIDEO;
mf.u.raw_video = fConnectedFormat;
ldebug("VideoProducer: frame: %Ld, playlistFrame: %Ld\n", fFrame, playlistFrame);
bool forceOrWasCached = forceSendingBuffer;
// if (fManager->LockWithTimeout(5000) == B_OK) {
// we need to lock the manager, or our
// fSupplier might work on bad data
err = fSupplier->FillBuffer(playlistFrame,
buffer->Data(), &mf,
forceOrWasCached);
// fManager->Unlock();
// } else {
// err = B_ERROR;
// }
// clean the buffer if something went wrong
if (err != B_OK) {
memset(buffer->Data(), 0, h->size_used);
err = B_OK;
}
// Send the buffer on down to the consumer
if (!forceOrWasCached) {
if (SendBuffer(buffer, fOutput.source,
fOutput.destination) != B_OK) {
printf("_FrameGenerator: Error sending buffer\n");
// If there is a problem sending the buffer,
// or if we don't send the buffer because its
// contents are the same as the last one,
// return it to its buffer group.
buffer->Recycle();
// we tell the supplier to delete
// its caches if there was a problem sending
// the buffer
fSupplier->DeleteCaches();
}
} else
buffer->Recycle();
// Only if everything went fine we clear the flag
// that forces us to send a buffer even if not
// playing.
if (err == B_OK) {
forceSendingBuffer = false;
lastFrameSentAt = performanceTime;
}
}
else ldebug("no buffer!\n");
// next frame
fFrame++;
} else {
ldebug("VideoProducer: not playing\n");
// next frame
fFrame++;
}
break;
default:
ldebug("Couldn't acquire semaphore. Error: %s\n", strerror(err));
running = false;
break;
}
}
ldebug("VideoProducer: frame generator thread done.\n");
return B_OK;
}
BBuffer*
AudioProducer::_FillNextBuffer(bigtime_t eventTime)
{
BBuffer* buffer = fBufferGroup->RequestBuffer(
fOutput.format.u.raw_audio.buffer_size, BufferDuration());
if (!buffer) {
ERROR("AudioProducer::_FillNextBuffer() - no buffer\n");
return NULL;
}
size_t sampleSize = fOutput.format.u.raw_audio.format
& media_raw_audio_format::B_AUDIO_SIZE_MASK;
size_t numSamples = fOutput.format.u.raw_audio.buffer_size / sampleSize;
// number of sample in the buffer
// fill in the buffer header
media_header* header = buffer->Header();
header->type = B_MEDIA_RAW_AUDIO;
header->time_source = TimeSource()->ID();
buffer->SetSizeUsed(fOutput.format.u.raw_audio.buffer_size);
bigtime_t performanceTime = bigtime_t(double(fFramesSent)
* 1000000.0 / double(fOutput.format.u.raw_audio.frame_rate));
// fill in data from audio supplier
int64 frameCount = numSamples / fOutput.format.u.raw_audio.channel_count;
bigtime_t startTime = performanceTime;
bigtime_t endTime = bigtime_t(double(fFramesSent + frameCount)
* 1000000.0 / fOutput.format.u.raw_audio.frame_rate);
if (!fSupplier || fSupplier->InitCheck() != B_OK
|| fSupplier->GetFrames(buffer->Data(), frameCount, startTime,
endTime) != B_OK) {
ERROR("AudioProducer::_FillNextBuffer() - supplier error -> silence\n");
memset(buffer->Data(), 0, buffer->SizeUsed());
}
// stamp buffer
if (RunMode() == B_RECORDING) {
header->start_time = eventTime;
} else {
header->start_time = fStartTime + performanceTime;
}
#if DEBUG_TO_FILE
BMediaTrack* track;
if (BMediaFile* file = init_media_file(fOutput.format, &track)) {
track->WriteFrames(buffer->Data(), frameCount);
}
#endif // DEBUG_TO_FILE
if (fPeakListener
&& fOutput.format.u.raw_audio.format
== media_raw_audio_format::B_AUDIO_FLOAT) {
// TODO: extend the peak notifier for other sample formats
int32 channels = fOutput.format.u.raw_audio.channel_count;
float max[channels];
float min[channels];
for (int32 i = 0; i < channels; i++) {
max[i] = -1.0;
min[i] = 1.0;
}
float* sample = (float*)buffer->Data();
for (uint32 i = 0; i < frameCount; i++) {
for (int32 k = 0; k < channels; k++) {
if (*sample < min[k])
min[k] = *sample;
if (*sample > max[k])
max[k] = *sample;
sample++;
}
}
BMessage message(MSG_PEAK_NOTIFICATION);
for (int32 i = 0; i < channels; i++) {
float maxAbs = max_c(fabs(min[i]), fabs(max[i]));
message.AddFloat("max", maxAbs);
}
bigtime_t realTime = TimeSource()->RealTimeFor(
fStartTime + performanceTime, 0);
MessageEvent* event = new (std::nothrow) MessageEvent(realTime,
fPeakListener, message);
if (event != NULL)
EventQueue::Default().AddEvent(event);
}
return buffer;
}
void
TVideoPreviewView::DisplayThread()
{
FUNCTION("TVideoPreviewView::DisplayThread\n");
bigtime_t timeout = 5000;
bigtime_t realTimeNow = 0;
bigtime_t perfTimeNow = 0;
bigtime_t halfPeriod = (bigtime_t) (500000./29.97);
bool timeSourceRunning = false;
while (!mDisplayQuit) {
if (acquire_sem(mServiceLock) == B_NO_ERROR) {
timeSourceRunning = TimeSource()->IsRunning();
realTimeNow = BTimeSource::RealTime();
perfTimeNow = TimeSource()->Now();
release_sem(mServiceLock);
}
snooze(timeout);
if (timeSourceRunning) {
// if we received a Stop, deal with it
if (mStopping) {
PROGRESS("VidConsumer::DisplayThread - STOP\n");
if (perfTimeNow >= mStopTime) {
mRunning = false;
mStopping = false;
// deal with any pending Seek
if (mSeeking)
mSeeking = false;
//if (mConnected)
// SendDataStatus(B_DATA_NOT_AVAILABLE, mConnections[0], mStopTime);
continue;
}
}
// if we received a Seek, deal with it
if (mSeeking) {
PROGRESS("VidConsumer::DisplayThread - SEEK\n");
if (perfTimeNow >= mSeekTime) {
PROGRESS("VidConsumer::DisplayThread - DO SEEK\n");
mSeeking = false;
mDeltaTime = mMediaTime;
continue;
}
}
// if we received a Start, deal with it
if (mStarting) {
PROGRESS("BBt848Controllable::CaptureRun mStartTime = %.4f TimeNow = %.4f\n", (double)mStartTime/M1, (double)perfTimeNow/M1);
if (perfTimeNow >= mStartTime) {
mRunning = true;
mStarting = false;
mDeltaTime = mStartTime;
//if (mConnected)
// SendDataStatus(B_DATA_AVAILABLE, mConnections[0], mStartTime);
continue;
}
}
if (mRunning) {
// check for buffer available.
status_t err = acquire_sem_etc(mBufferAvailable, 1, B_TIMEOUT, halfPeriod * 2);
if (err == B_TIMED_OUT || !mConnected) {
ERROR("VidConsumer::DisplayThread - Error from acquire_sem_etc: 0x%lx\n", err);
continue;
}
BBuffer* buffer = mBufferQueue->PopFirstBuffer(0);
LOOP("Popped buffer %08x, Start time: %.4f, system time: %.4f diff: %.4f\n",
buffer,
(double) buffer->Header()->start_time/M1,
(double) perfTimeNow/M1,
(double) (buffer->Header()->start_time - perfTimeNow)/M1);
// Display frame if we're in B_OFFLINE mode or
// within +/- a half frame time of start time
if ( (mRunMode == B_OFFLINE) ||
((perfTimeNow > (buffer->Header()->start_time - halfPeriod)) &&
(perfTimeNow < (buffer->Header()->start_time + halfPeriod))) ) {
uint32 bpp = (mColorspace == B_RGB32 ? 4 : 2);
memcpy(m_Bitmap->Bits(), buffer->Data(), mRowBytes * mYSize * bpp);
buffer->Header()->start_time = system_time();
buffer->Recycle();
bigtime_t t1 = system_time();
// Update view
if (LockLooper()) {
DrawBitmap(m_Bitmap, Bounds());
UnlockLooper();
}
t1 = system_time() - t1;
if (t1/M1 > .030)
printf("Draw time = %.4f\n",t1/M1);
continue;
} else {
// If we're too early, push frame back on stack
if (perfTimeNow < buffer->Header()->start_time) {
LOOP("push buffer back on stack!\n");
mBufferQueue->PushBuffer(buffer, buffer->Header()->start_time);
release_sem(mBufferAvailable);
continue;
} else {
// if we've already passed a half frame time past the buffer start time
// and RunMode = INCREASE_LATENCY, increase latency and display the frame
if ( (perfTimeNow > buffer->Header()->start_time) &&
(mRunMode == B_INCREASE_LATENCY)) {
mMyLatency += halfPeriod;
ERROR("VidConsumer::DisplayThread - Increased latency to: %.4f\n", mMyLatency);
ERROR(" Performance time: %.4f @ %.4f\n", (double)buffer->Header()->start_time/M1, (double)perfTimeNow/M1);
uint32 bpp = (mColorspace == B_RGB32 ? 4 : 2);
memcpy(m_Bitmap->Bits(), buffer->Data(), mRowBytes * mYSize * bpp);
buffer->Recycle();
// should send late notice
if (LockLooper()) {
DrawBitmap(m_Bitmap, Bounds());
UnlockLooper();
}
continue;
} else {
// we're more than a half frame time past the buffer start time
// drop the frame
ERROR("VidConsumer::DisplayThread - dropped late frame: %.4f @ %.4f\n", (double)buffer->Header()->start_time/M1, (double)perfTimeNow/M1);
buffer->Recycle();
// should send late notice
continue;
}
}
}
}
snooze(timeout);
} else snooze(timeout); // if TimeSource stopped
} // while (!mTimeToQuit)
}
int main()
{
// app_server connection (no need to run it)
BApplication app("application/x-vnd-test");
BBufferGroup * group;
status_t s;
int32 count;
BBuffer *buffer;
/*
printf("using default constructor:\n");
group = new BBufferGroup();
s = group->InitCheck();
printf("InitCheck: status = %ld\n",s);
s = group->CountBuffers(&count);
printf("CountBuffers: count = %ld, status = %ld\n",count,s);
delete group;
*/
printf("\n");
printf("using size = 1234 constructor:\n");
group = new BBufferGroup(1234);
s = group->InitCheck();
printf("InitCheck: status = %ld\n",s);
s = group->CountBuffers(&count);
printf("CountBuffers: count = %ld, status = %ld\n",count,s);
s = group->GetBufferList(1,&buffer);
printf("GetBufferList: status = %ld\n",s);
printf("Buffer->Data: = %08x\n",(int)buffer->Data());
printf("Buffer->ID: = %d\n",(int)buffer->ID());
printf("Buffer->Size: = %ld\n",buffer->Size());
printf("Buffer->SizeAvailable: = %ld\n",buffer->SizeAvailable());
printf("Buffer->SizeUsed: = %ld\n",buffer->SizeUsed());
printf("\n");
media_buffer_id id = buffer->ID();
BBufferGroup * group2 = new BBufferGroup(1,&id);
printf("creating second group with a buffer from first group:\n");
s = group2->InitCheck();
printf("InitCheck: status = %ld\n",s);
s = group2->CountBuffers(&count);
printf("CountBuffers: count = %ld, status = %ld\n",count,s);
buffer = 0;
s = group2->GetBufferList(1,&buffer);
printf("GetBufferList: status = %ld\n",s);
printf("Buffer->Data: = %08x\n",(int)buffer->Data());
printf("Buffer->ID: = %d\n",(int)buffer->ID());
printf("Buffer->Size: = %ld\n",buffer->Size());
printf("Buffer->SizeAvailable: = %ld\n",buffer->SizeAvailable());
printf("Buffer->SizeUsed: = %ld\n",buffer->SizeUsed());
delete group;
delete group2;
printf("\n");
/*
printf("creating a BSmallBuffer:\n");
BSmallBuffer * sb = new BSmallBuffer;
printf("sb->Data: = %08x\n",(int)sb->Data());
printf("sb->ID: = %d\n",(int)sb->ID());
printf("sb->Size: = %ld\n",sb->Size());
printf("sb->SizeAvailable: = %ld\n",sb->SizeAvailable());
printf("sb->SizeUsed: = %ld\n",sb->SizeUsed());
printf("sb->SmallBufferSizeLimit: = %ld\n",sb->SmallBufferSizeLimit());
delete sb;
*/
return 0;
}
void
AudioProducer::HandleEvent(const media_timed_event* event, bigtime_t lateness,
bool realTimeEvent)
{
TRACE_BUFFER("%p->AudioProducer::HandleEvent()\n", this);
switch (event->type) {
case BTimedEventQueue::B_START:
TRACE("AudioProducer::HandleEvent(B_START)\n");
if (RunState() != B_STARTED) {
fFramesSent = 0;
fStartTime = event->event_time + fSupplier->InitialLatency();
printf("B_START: start time: %lld\n", fStartTime);
media_timed_event firstBufferEvent(
fStartTime - fSupplier->InitialLatency(),
BTimedEventQueue::B_HANDLE_BUFFER);
EventQueue()->AddEvent(firstBufferEvent);
}
TRACE("AudioProducer::HandleEvent(B_START) done\n");
break;
case BTimedEventQueue::B_STOP:
TRACE("AudioProducer::HandleEvent(B_STOP)\n");
EventQueue()->FlushEvents(0, BTimedEventQueue::B_ALWAYS, true,
BTimedEventQueue::B_HANDLE_BUFFER);
TRACE("AudioProducer::HandleEvent(B_STOP) done\n");
break;
case BTimedEventQueue::B_HANDLE_BUFFER:
{
TRACE_BUFFER("AudioProducer::HandleEvent(B_HANDLE_BUFFER)\n");
if (RunState() == BMediaEventLooper::B_STARTED
&& fOutput.destination != media_destination::null) {
BBuffer* buffer = _FillNextBuffer(event->event_time);
if (buffer) {
status_t err = B_ERROR;
if (fOutputEnabled) {
err = SendBuffer(buffer, fOutput.source,
fOutput.destination);
}
if (err)
buffer->Recycle();
}
size_t sampleSize = fOutput.format.u.raw_audio.format
& media_raw_audio_format::B_AUDIO_SIZE_MASK;
size_t nFrames = fOutput.format.u.raw_audio.buffer_size
/ (sampleSize * fOutput.format.u.raw_audio.channel_count);
fFramesSent += nFrames;
fNextScheduledBuffer = fStartTime
+ bigtime_t(double(fFramesSent) * 1000000.0
/ double(fOutput.format.u.raw_audio.frame_rate));
media_timed_event nextBufferEvent(fNextScheduledBuffer,
BTimedEventQueue::B_HANDLE_BUFFER);
EventQueue()->AddEvent(nextBufferEvent);
} else {
ERROR("B_HANDLE_BUFFER, but not started!\n");
}
TRACE_BUFFER("AudioProducer::HandleEvent(B_HANDLE_BUFFER) done\n");
break;
}
default:
break;
}
}
void
GameProducer::HandleEvent(const media_timed_event* event, bigtime_t lateness,
bool realTimeEvent)
{
// FPRINTF(stderr, "ToneProducer::HandleEvent\n");
switch (event->type)
{
case BTimedEventQueue::B_START:
// don't do anything if we're already running
if (RunState() != B_STARTED) {
// Going to start sending buffers so setup the needed bookkeeping
fFramesSent = 0;
fStartTime = event->event_time;
media_timed_event firstBufferEvent(fStartTime,
BTimedEventQueue::B_HANDLE_BUFFER);
// Alternatively, we could call HandleEvent() directly with this
// event, to avoid a trip through the event queue like this:
// this->HandleEvent(&firstBufferEvent, 0, false);
EventQueue()->AddEvent(firstBufferEvent);
}
break;
case BTimedEventQueue::B_STOP:
// When we handle a stop, we must ensure that downstream consumers don't
// get any more buffers from us. This means we have to flush any
// pending buffer-producing events from the queue.
EventQueue()->FlushEvents(0, BTimedEventQueue::B_ALWAYS, true,
BTimedEventQueue::B_HANDLE_BUFFER);
break;
case BTimedEventQueue::B_HANDLE_BUFFER:
{
// Ensure we're both started and connected before delivering buffer
if ((RunState() == BMediaEventLooper::B_STARTED)
&& (fOutput.destination != media_destination::null)) {
// Get the next buffer of data
BBuffer* buffer = FillNextBuffer(event->event_time);
if (buffer) {
// Send the buffer downstream if output is enabled
status_t err = B_ERROR;
if (fOutputEnabled) {
err = SendBuffer(buffer, fOutput.source,
fOutput.destination);
}
if (err) {
// we need to recycle the buffer ourselves if output is
// disabled or if the call to SendBuffer() fails
buffer->Recycle();
}
}
// track how much media we've delivered so far
size_t nFrames = fBufferSize / fFrameSize;
fFramesSent += nFrames;
// The buffer is on its way; now schedule the next one to go
bigtime_t nextEvent = fStartTime + bigtime_t(double(fFramesSent)
/ double(fOutput.format.u.raw_audio.frame_rate)
* 1000000.0);
media_timed_event nextBufferEvent(nextEvent,
BTimedEventQueue::B_HANDLE_BUFFER);
EventQueue()->AddEvent(nextBufferEvent);
}
}
break;
default:
break;
}
}
// how should we handle late buffers? drop them?
// notify the producer?
status_t
SoundPlayNode::SendNewBuffer(const media_timed_event* event,
bigtime_t lateness, bool realTimeEvent)
{
CALLED();
// printf("latency = %12Ld, event = %12Ld, sched = %5Ld, arrive at %12Ld, now %12Ld, current lateness %12Ld\n", EventLatency() + SchedulingLatency(), EventLatency(), SchedulingLatency(), event->event_time, TimeSource()->Now(), lateness);
// make sure we're both started *and* connected before delivering a buffer
if (RunState() != BMediaEventLooper::B_STARTED
|| fOutput.destination == media_destination::null)
return B_OK;
// The event->event_time is the time at which the buffer we are preparing
// here should arrive at it's destination. The MediaEventLooper should have
// scheduled us early enough (based on EventLatency() and the
// SchedulingLatency()) to make this possible.
// lateness is independent of EventLatency()!
if (lateness > (BufferDuration() / 3) ) {
printf("SoundPlayNode::SendNewBuffer, event scheduled much too late, "
"lateness is %Ld\n", lateness);
}
// skip buffer creation if output not enabled
if (fOutputEnabled) {
// Get the next buffer of data
BBuffer* buffer = FillNextBuffer(event->event_time);
if (buffer) {
// If we are ready way too early, decrase internal latency
/*
bigtime_t how_early = event->event_time - TimeSource()->Now() - fLatency - fInternalLatency;
if (how_early > 5000) {
printf("SoundPlayNode::SendNewBuffer, event scheduled too early, how_early is %Ld\n", how_early);
if (fTooEarlyCount++ == 5) {
fInternalLatency -= how_early;
if (fInternalLatency < 500)
fInternalLatency = 500;
printf("SoundPlayNode::SendNewBuffer setting internal latency to %Ld\n", fInternalLatency);
SetEventLatency(fLatency + fInternalLatency);
fTooEarlyCount = 0;
}
}
*/
// send the buffer downstream if and only if output is enabled
if (SendBuffer(buffer, fOutput.source, fOutput.destination)
!= B_OK) {
// we need to recycle the buffer
// if the call to SendBuffer() fails
printf("SoundPlayNode::SendNewBuffer: Buffer sending "
"failed\n");
buffer->Recycle();
}
}
}
// track how much media we've delivered so far
size_t nFrames = fOutput.format.u.raw_audio.buffer_size
/ ((fOutput.format.u.raw_audio.format
& media_raw_audio_format::B_AUDIO_SIZE_MASK)
* fOutput.format.u.raw_audio.channel_count);
fFramesSent += nFrames;
// The buffer is on its way; now schedule the next one to go
// nextEvent is the time at which the buffer should arrive at it's
// destination
bigtime_t nextEvent = fStartTime + bigtime_t((1000000LL * fFramesSent)
/ (int32)fOutput.format.u.raw_audio.frame_rate);
media_timed_event nextBufferEvent(nextEvent, SEND_NEW_BUFFER_EVENT);
EventQueue()->AddEvent(nextBufferEvent);
return B_OK;
}
status_t
BBufferConsumer::HandleMessage(int32 message, const void* data, size_t size)
{
PRINT(4, "BBufferConsumer::HandleMessage %#lx, node %ld\n", message, ID());
status_t rv;
switch (message) {
case CONSUMER_ACCEPT_FORMAT:
{
const consumer_accept_format_request* request
= static_cast<const consumer_accept_format_request*>(data);
consumer_accept_format_reply reply;
reply.format = request->format;
status_t status = AcceptFormat(request->dest, &reply.format);
request->SendReply(status, &reply, sizeof(reply));
return B_OK;
}
case CONSUMER_GET_NEXT_INPUT:
{
const consumer_get_next_input_request *request = static_cast<const consumer_get_next_input_request *>(data);
consumer_get_next_input_reply reply;
reply.cookie = request->cookie;
rv = GetNextInput(&reply.cookie, &reply.input);
request->SendReply(rv, &reply, sizeof(reply));
return B_OK;
}
case CONSUMER_DISPOSE_INPUT_COOKIE:
{
const consumer_dispose_input_cookie_request *request = static_cast<const consumer_dispose_input_cookie_request *>(data);
consumer_dispose_input_cookie_reply reply;
DisposeInputCookie(request->cookie);
request->SendReply(B_OK, &reply, sizeof(reply));
return B_OK;
}
case CONSUMER_BUFFER_RECEIVED:
{
const consumer_buffer_received_command* command
= static_cast<const consumer_buffer_received_command*>(data);
BBuffer* buffer = fBufferCache->GetBuffer(command->buffer);
if (buffer == NULL) {
ERROR("BBufferConsumer::CONSUMER_BUFFER_RECEIVED can't"
"find the buffer\n");
} else {
buffer->SetHeader(&command->header);
PRINT(4, "calling BBufferConsumer::BufferReceived buffer %ld "
"at perf %Ld and TimeSource()->Now() is %Ld\n",
buffer->Header()->buffer, buffer->Header()->start_time,
TimeSource()->Now());
BufferReceived(buffer);
}
return B_OK;
}
case CONSUMER_PRODUCER_DATA_STATUS:
{
const consumer_producer_data_status_command *command = static_cast<const consumer_producer_data_status_command *>(data);
ProducerDataStatus(command->for_whom, command->status, command->at_performance_time);
return B_OK;
}
case CONSUMER_GET_LATENCY_FOR:
{
const consumer_get_latency_for_request *request = static_cast<const consumer_get_latency_for_request *>(data);
consumer_get_latency_for_reply reply;
rv = GetLatencyFor(request->for_whom, &reply.latency, &reply.timesource);
request->SendReply(rv, &reply, sizeof(reply));
return B_OK;
}
case CONSUMER_CONNECTED:
{
const consumer_connected_request *request = static_cast<const consumer_connected_request *>(data);
consumer_connected_reply reply;
reply.input = request->input;
rv = Connected(request->input.source, request->input.destination, request->input.format, &reply.input);
request->SendReply(rv, &reply, sizeof(reply));
return B_OK;
}
case CONSUMER_DISCONNECTED:
{
const consumer_disconnected_request *request = static_cast<const consumer_disconnected_request *>(data);
consumer_disconnected_reply reply;
Disconnected(request->source, request->destination);
request->SendReply(B_OK, &reply, sizeof(reply));
return B_OK;
}
case CONSUMER_FORMAT_CHANGED:
{
const consumer_format_changed_request *request = static_cast<const consumer_format_changed_request *>(data);
consumer_format_changed_reply reply;
rv = FormatChanged(request->producer, request->consumer, request->change_tag, request->format);
request->SendReply(rv, &reply, sizeof(reply));
// XXX is this RequestCompleted() correct?
node_request_completed_command completedcommand;
completedcommand.info.what = media_request_info::B_FORMAT_CHANGED;
completedcommand.info.change_tag = request->change_tag;
completedcommand.info.status = reply.result;
//completedcommand.info.cookie
completedcommand.info.user_data = 0;
completedcommand.info.source = request->producer;
completedcommand.info.destination = request->consumer;
completedcommand.info.format = request->format;
SendToPort(request->consumer.port, NODE_REQUEST_COMPLETED, &completedcommand, sizeof(completedcommand));
return B_OK;
}
case CONSUMER_SEEK_TAG_REQUESTED:
{
const consumer_seek_tag_requested_request *request = static_cast<const consumer_seek_tag_requested_request *>(data);
consumer_seek_tag_requested_reply reply;
rv = SeekTagRequested(request->destination, request->target_time, request->flags, &reply.seek_tag, &reply.tagged_time, &reply.flags);
request->SendReply(rv, &reply, sizeof(reply));
return B_OK;
}
}
return B_ERROR;
}
void MediaReader::Connect(
status_t error,
const media_source & source,
const media_destination & destination,
const media_format & format,
char * io_name)
{
CALLED();
if (error != B_OK) {
PRINT("\t<- error already\n");
output.destination = media_destination::null;
GetFormat(&output.format);
return;
}
if (output.source != source) {
PRINT("\t<- B_MEDIA_BAD_SOURCE\n");
output.destination = media_destination::null;
GetFormat(&output.format);
return;
}
// record the agreed upon values
output.destination = destination;
output.format = format;
strncpy(io_name,output.name,B_MEDIA_NAME_LENGTH-1);
io_name[B_MEDIA_NAME_LENGTH-1] = '\0';
// determine our downstream latency
media_node_id id;
FindLatencyFor(output.destination, &fDownstreamLatency, &id);
// compute the buffer period (must be done before setbuffergroup)
fBufferPeriod = bigtime_t(1000 * 8000000 / 1024
* output.format.u.multistream.max_chunk_size
/ output.format.u.multistream.max_bit_rate);
PRINT("\tmax chunk size = %ld, max bit rate = %f, buffer period = %lld\n",
output.format.u.multistream.max_chunk_size,
output.format.u.multistream.max_bit_rate,fBufferPeriod);
// setup the buffers if they aren't setup yet
if (fBufferGroup == 0) {
status_t status = SetBufferGroup(output.source,0);
if (status != B_OK) {
PRINT("\t<- SetBufferGroup failed\n");
output.destination = media_destination::null;
GetFormat(&output.format);
return;
}
}
SetBufferDuration(fBufferPeriod);
if (GetCurrentFile() != 0) {
bigtime_t start, end;
// buffer group buffer size
uint8 * data = new uint8[output.format.u.multistream.max_chunk_size];
BBuffer * buffer = 0;
ssize_t bytesRead = 0;
{ // timed section
start = TimeSource()->RealTime();
// first we try to use a real BBuffer
buffer = fBufferGroup->RequestBuffer(
output.format.u.multistream.max_chunk_size,fBufferPeriod);
if (buffer != 0) {
FillFileBuffer(buffer);
} else {
// didn't get a real BBuffer, try simulation by just a read from the disk
bytesRead = GetCurrentFile()->Read(
data, output.format.u.multistream.max_chunk_size);
}
end = TimeSource()->RealTime();
}
bytesRead = buffer->SizeUsed();
delete data;
if (buffer != 0) {
buffer->Recycle();
}
GetCurrentFile()->Seek(-bytesRead,SEEK_CUR); // put it back where we found it
fInternalLatency = end - start;
PRINT("\tinternal latency from disk read = %lld\n", fInternalLatency);
} else {
fInternalLatency = 100; // just guess
PRINT("\tinternal latency guessed = %lld\n", fInternalLatency);
}
SetEventLatency(fDownstreamLatency + fInternalLatency);
// XXX: do anything else?
}
int32
VideoProducer::_FrameGeneratorThread()
{
bool forceSendingBuffer = true;
int32 droppedFrames = 0;
const int32 kMaxDroppedFrames = 15;
bool running = true;
while (running) {
TRACE("_FrameGeneratorThread: loop: %Ld\n", fFrame);
// lock the node manager
status_t err = fManager->LockWithTimeout(10000);
bool ignoreEvent = false;
// Data to be retrieved from the node manager.
bigtime_t performanceTime = 0;
bigtime_t nextPerformanceTime = 0;
bigtime_t waitUntil = 0;
bigtime_t nextWaitUntil = 0;
int32 playingDirection = 0;
int32 playingMode = 0;
int64 playlistFrame = 0;
switch (err) {
case B_OK: {
TRACE("_FrameGeneratorThread: node manager successfully "
"locked\n");
if (droppedFrames > 0)
fManager->FrameDropped();
// get the times for the current and the next frame
performanceTime = fManager->TimeForFrame(fFrame);
nextPerformanceTime = fManager->TimeForFrame(fFrame + 1);
playingMode = fManager->PlayModeAtFrame(fFrame);
waitUntil = TimeSource()->RealTimeFor(fPerformanceTimeBase
+ performanceTime, fBufferLatency);
nextWaitUntil = TimeSource()->RealTimeFor(fPerformanceTimeBase
+ nextPerformanceTime, fBufferLatency);
// get playing direction and playlist frame for the current
// frame
bool newPlayingState;
playlistFrame = fManager->PlaylistFrameAtFrame(fFrame,
playingDirection, newPlayingState);
TRACE("_FrameGeneratorThread: performance time: %Ld, "
"playlist frame: %lld\n", performanceTime, playlistFrame);
forceSendingBuffer |= newPlayingState;
fManager->SetCurrentVideoTime(nextPerformanceTime);
fManager->Unlock();
break;
}
case B_TIMED_OUT:
TRACE("_FrameGeneratorThread: Couldn't lock the node "
"manager.\n");
ignoreEvent = true;
waitUntil = system_time() - 1;
break;
default:
ERROR("_FrameGeneratorThread: Couldn't lock the node manager. "
"Terminating video producer frame generator thread.\n");
TRACE("_FrameGeneratorThread: frame generator thread done.\n");
// do not access any member variables, since this could
// also mean the Node has been deleted
return B_OK;
}
TRACE("_FrameGeneratorThread: waiting (%Ld)...\n", waitUntil);
// wait until...
err = acquire_sem_etc(fFrameSync, 1, B_ABSOLUTE_TIMEOUT, waitUntil);
// The only acceptable responses are B_OK and B_TIMED_OUT. Everything
// else means the thread should quit. Deleting the semaphore, as in
// VideoProducer::_HandleStop(), will trigger this behavior.
switch (err) {
case B_OK:
TRACE("_FrameGeneratorThread: going back to sleep.\n");
break;
case B_TIMED_OUT:
TRACE("_FrameGeneratorThread: timed out => event\n");
// Catch the cases in which the node manager could not be
// locked and we therefore have no valid data to work with,
// or the producer is not running or enabled.
if (ignoreEvent || !fRunning || !fEnabled) {
TRACE("_FrameGeneratorThread: ignore event\n");
// nothing to do
} else if (!forceSendingBuffer
&& nextWaitUntil < system_time() - fBufferLatency
&& droppedFrames < kMaxDroppedFrames) {
// Drop frame if it's at least a frame late.
if (playingDirection > 0)
printf("VideoProducer: dropped frame (%Ld)\n", fFrame);
// next frame
droppedFrames++;
fFrame++;
} else if (playingDirection != 0 || forceSendingBuffer) {
// Send buffers only, if playing, the node is running and
// the output has been enabled
TRACE("_FrameGeneratorThread: produce frame\n");
BAutolock _(fLock);
// Fetch a buffer from the buffer group
fUsedBufferGroup->WaitForBuffers();
BBuffer* buffer = fUsedBufferGroup->RequestBuffer(
fConnectedFormat.display.bytes_per_row
* fConnectedFormat.display.line_count, 0LL);
if (buffer == NULL) {
// Wait until a buffer becomes available again
ERROR("_FrameGeneratorThread: no buffer!\n");
break;
}
// Fill out the details about this buffer.
media_header* h = buffer->Header();
h->type = B_MEDIA_RAW_VIDEO;
h->time_source = TimeSource()->ID();
h->size_used = fConnectedFormat.display.bytes_per_row
* fConnectedFormat.display.line_count;
// For a buffer originating from a device, you might
// want to calculate this based on the
// PerformanceTimeFor the time your buffer arrived at
// the hardware (plus any applicable adjustments).
h->start_time = fPerformanceTimeBase + performanceTime;
h->file_pos = 0;
h->orig_size = 0;
h->data_offset = 0;
h->u.raw_video.field_gamma = 1.0;
h->u.raw_video.field_sequence = fFrame;
h->u.raw_video.field_number = 0;
h->u.raw_video.pulldown_number = 0;
h->u.raw_video.first_active_line = 1;
h->u.raw_video.line_count
= fConnectedFormat.display.line_count;
// Fill in a frame
TRACE("_FrameGeneratorThread: frame: %Ld, "
"playlistFrame: %Ld\n", fFrame, playlistFrame);
bool wasCached = false;
err = fSupplier->FillBuffer(playlistFrame,
buffer->Data(), fConnectedFormat, forceSendingBuffer,
wasCached);
if (err == B_TIMED_OUT) {
// Don't send the buffer if there was insufficient
// time for rendering, this will leave the last
// valid frame on screen until we catch up, instead
// of going black.
wasCached = true;
err = B_OK;
}
// clean the buffer if something went wrong
if (err != B_OK) {
// TODO: should use "back value" according
// to color space!
memset(buffer->Data(), 0, h->size_used);
err = B_OK;
}
// Send the buffer on down to the consumer
if (wasCached || (err = SendBuffer(buffer, fOutput.source,
fOutput.destination) != B_OK)) {
// If there is a problem sending the buffer,
// or if we don't send the buffer because its
// contents are the same as the last one,
// return it to its buffer group.
buffer->Recycle();
// we tell the supplier to delete
// its caches if there was a problem sending
// the buffer
if (err != B_OK) {
ERROR("_FrameGeneratorThread: Error "
"sending buffer\n");
fSupplier->DeleteCaches();
}
}
// Only if everything went fine we clear the flag
// that forces us to send a buffer even if not
// playing.
if (err == B_OK)
forceSendingBuffer = false;
// next frame
fFrame++;
droppedFrames = 0;
} else {
TRACE("_FrameGeneratorThread: not playing\n");
// next frame
fFrame++;
}
break;
default:
TRACE("_FrameGeneratorThread: Couldn't acquire semaphore. "
"Error: %s\n", strerror(err));
running = false;
break;
}
}
TRACE("_FrameGeneratorThread: frame generator thread done.\n");
return B_OK;
}
BBuffer*
ToneProducer::FillNextBuffer(bigtime_t event_time)
{
// get a buffer from our buffer group
BBuffer* buf = mBufferGroup->RequestBuffer(mOutput.format.u.raw_audio.buffer_size, BufferDuration());
// if we fail to get a buffer (for example, if the request times out), we skip this
// buffer and go on to the next, to avoid locking up the control thread
if (!buf)
{
return NULL;
}
// now fill it with data, continuing where the last buffer left off
// 20sep99: multichannel support
size_t numFrames =
mOutput.format.u.raw_audio.buffer_size /
(sizeof(float)*mOutput.format.u.raw_audio.channel_count);
bool stereo = (mOutput.format.u.raw_audio.channel_count == 2);
if(!stereo) {
ASSERT(mOutput.format.u.raw_audio.channel_count == 1);
}
// PRINT(("buffer: %ld, %ld frames, %s\n", mOutput.format.u.raw_audio.buffer_size, numFrames, stereo ? "stereo" : "mono"));
float* data = (float*) buf->Data();
switch (mWaveform)
{
case SINE_WAVE:
FillSineBuffer(data, numFrames, stereo);
break;
case TRIANGLE_WAVE:
FillTriangleBuffer(data, numFrames, stereo);
break;
case SAWTOOTH_WAVE:
FillSawtoothBuffer(data, numFrames, stereo);
break;
}
// fill in the buffer header
media_header* hdr = buf->Header();
hdr->type = B_MEDIA_RAW_AUDIO;
hdr->size_used = mOutput.format.u.raw_audio.buffer_size;
hdr->time_source = TimeSource()->ID();
bigtime_t stamp;
if (RunMode() == B_RECORDING)
{
// In B_RECORDING mode, we stamp with the capture time. We're not
// really a hardware capture node, but we simulate it by using the (precalculated)
// time at which this buffer "should" have been created.
stamp = event_time;
}
else
{
// okay, we're in one of the "live" performance run modes. in these modes, we
// stamp the buffer with the time at which the buffer should be rendered to the
// output, not with the capture time. mStartTime is the cached value of the
// first buffer's performance time; we calculate this buffer's performance time as
// an offset from that time, based on the amount of media we've created so far.
// Recalculating every buffer like this avoids accumulation of error.
stamp = mStartTime + bigtime_t(double(mFramesSent) / double(mOutput.format.u.raw_audio.frame_rate) * 1000000.0);
}
hdr->start_time = stamp;
return buf;
}
void
ToneProducer::HandleEvent(const media_timed_event* event, bigtime_t lateness, bool realTimeEvent)
{
// FPRINTF(stderr, "ToneProducer::HandleEvent\n");
switch (event->type)
{
case BTimedEventQueue::B_START:
// don't do anything if we're already running
if (RunState() != B_STARTED)
{
// We want to start sending buffers now, so we set up the buffer-sending bookkeeping
// and fire off the first "produce a buffer" event.
mFramesSent = 0;
mTheta = 0;
mStartTime = event->event_time;
media_timed_event firstBufferEvent(mStartTime, BTimedEventQueue::B_HANDLE_BUFFER);
// Alternatively, we could call HandleEvent() directly with this event, to avoid a trip through
// the event queue, like this:
//
// this->HandleEvent(&firstBufferEvent, 0, false);
//
EventQueue()->AddEvent(firstBufferEvent);
}
break;
case BTimedEventQueue::B_STOP:
FPRINTF(stderr, "Handling B_STOP event\n");
// When we handle a stop, we must ensure that downstream consumers don't
// get any more buffers from us. This means we have to flush any pending
// buffer-producing events from the queue.
EventQueue()->FlushEvents(0, BTimedEventQueue::B_ALWAYS, true, BTimedEventQueue::B_HANDLE_BUFFER);
break;
case _PARAMETER_EVENT:
{
size_t dataSize = size_t(event->data);
int32 param = int32(event->bigdata);
if (dataSize >= sizeof(float)) switch (param)
{
case FREQUENCY_PARAM:
{
float newValue = *((float*) event->user_data);
if (mFrequency != newValue) // an actual change in the value?
{
mFrequency = newValue;
mFreqLastChanged = TimeSource()->Now();
BroadcastNewParameterValue(mFreqLastChanged, param, &mFrequency, sizeof(mFrequency));
}
}
break;
case GAIN_PARAM:
{
float newValue = *((float*) event->user_data);
if (mGain != newValue)
{
mGain = newValue;
mGainLastChanged = TimeSource()->Now();
BroadcastNewParameterValue(mGainLastChanged, param, &mGain, sizeof(mGain));
}
}
break;
case WAVEFORM_PARAM:
{
int32 newValue = *((int32*) event->user_data);
if (mWaveform != newValue)
{
mWaveform = newValue;
mTheta = 0; // reset the generator parameters when we change waveforms
mWaveAscending = true;
mWaveLastChanged = TimeSource()->Now();
BroadcastNewParameterValue(mWaveLastChanged, param, &mWaveform, sizeof(mWaveform));
}
}
break;
default:
FPRINTF(stderr, "Hmmm... got a B_PARAMETER event for a parameter we don't have? (%" B_PRId32 ")\n", param);
break;
}
}
break;
case BTimedEventQueue::B_HANDLE_BUFFER:
{
// make sure we're both started *and* connected before delivering a buffer
if (RunState() == BMediaEventLooper::B_STARTED
&& mOutput.destination != media_destination::null) {
// Get the next buffer of data
BBuffer* buffer = FillNextBuffer(event->event_time);
if (buffer) {
// send the buffer downstream if and only if output is enabled
status_t err = B_ERROR;
if (mOutputEnabled) {
err = SendBuffer(buffer, mOutput.source,
mOutput.destination);
}
if (err) {
// we need to recycle the buffer ourselves if output is disabled or
// if the call to SendBuffer() fails
buffer->Recycle();
}
}
// track how much media we've delivered so far
size_t nFrames = mOutput.format.u.raw_audio.buffer_size /
(sizeof(float) * mOutput.format.u.raw_audio.channel_count);
mFramesSent += nFrames;
// The buffer is on its way; now schedule the next one to go
bigtime_t nextEvent = mStartTime + bigtime_t(double(mFramesSent)
/ double(mOutput.format.u.raw_audio.frame_rate) * 1000000.0);
media_timed_event nextBufferEvent(nextEvent,
BTimedEventQueue::B_HANDLE_BUFFER);
EventQueue()->AddEvent(nextBufferEvent);
}
}
break;
default:
break;
}
}
// create or discard buffer group if necessary
void AudioFilterNode::updateBufferGroup() {
status_t err;
size_t inputSize = bytes_per_frame(m_input.format.u.raw_audio);
size_t outputSize = bytes_per_frame(m_output.format.u.raw_audio);
if(m_input.source == media_source::null ||
m_output.destination == media_destination::null ||
inputSize >= outputSize) {
PRINT(("###### NO BUFFER GROUP NEEDED\n"));
// no internal buffer group needed
if(m_bufferGroup) {
// does this block? +++++
delete m_bufferGroup;
m_bufferGroup = 0;
}
return;
}
int32 bufferCount = EventLatency() / BufferDuration() + 1 + 1;
// +++++
// [e.moon 27sep99] this is a reasonable number of buffers,
// but it fails with looped file-player node in BeOS 4.5.2.
//
if(bufferCount < 5)
bufferCount = 5;
// if(bufferCount < 3)
// bufferCount = 3;
if(m_bufferGroup) {
// is the current group sufficient?
int32 curBufferCount;
err = m_bufferGroup->CountBuffers(&curBufferCount);
if(err == B_OK && curBufferCount >= bufferCount) {
BBuffer* buf = m_bufferGroup->RequestBuffer(
outputSize, -1);
if(buf) {
// yup
buf->Recycle();
return;
}
}
// nope, delete it to make way for the new one
delete m_bufferGroup;
m_bufferGroup = 0;
}
// create buffer group
PRINT((
"##### AudioFilterNode::updateBufferGroup():\n"
"##### creating %ld buffers of size %ld\n",
bufferCount, m_output.format.u.raw_audio.buffer_size));
m_bufferGroup = new BBufferGroup(
m_output.format.u.raw_audio.buffer_size,
bufferCount);
}
void AudioFilterNode::BufferReceived(
BBuffer* buffer) {
ASSERT(buffer);
// check buffer destination
if(buffer->Header()->destination !=
m_input.destination.id) {
PRINT(("AudioFilterNode::BufferReceived():\n"
"\tBad destination.\n"));
buffer->Recycle();
return;
}
if(buffer->Header()->time_source != TimeSource()->ID()) { // +++++ no-go in offline mode
PRINT(("* timesource mismatch\n"));
}
// check output
if(m_output.destination == media_destination::null ||
!m_outputEnabled) {
buffer->Recycle();
return;
}
// // +++++ [9sep99]
// bigtime_t now = TimeSource()->Now();
// bigtime_t delta = now - m_tpLastReceived;
// m_tpLastReceived = now;
// PRINT((
// "### delta: %Ld (%Ld)\n",
// delta, buffer->Header()->start_time - now));
// fetch outbound buffer if needed
BBuffer* outBuffer;
if(m_bufferGroup) {
outBuffer = m_bufferGroup->RequestBuffer(
m_output.format.u.raw_audio.buffer_size, -1);
ASSERT(outBuffer);
// prepare outbound buffer
outBuffer->Header()->type = B_MEDIA_RAW_AUDIO;
// copy start time info from upstream node
// +++++ is this proper, or should the next buffer-start be
// continuously tracked (figured from Start() or the first
// buffer received?)
outBuffer->Header()->time_source = buffer->Header()->time_source;
outBuffer->Header()->start_time = buffer->Header()->start_time;
}
else {
// process inplace
outBuffer = buffer;
}
// process and retransmit buffer
processBuffer(buffer, outBuffer);
status_t err = SendBuffer(outBuffer, m_output.source, m_output.destination);
if (err < B_OK) {
PRINT(("AudioFilterNode::BufferReceived():\n"
"\tSendBuffer() failed: %s\n", strerror(err)));
outBuffer->Recycle();
}
// free inbound buffer if data was copied
if(buffer != outBuffer)
buffer->Recycle();
// //####resend
// SendBuffer(buffer, m_output.destination);
// sent!
}
