// 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;
}
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 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?
}
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;
}