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/*
* transfer.c: Transfer mode
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: transfer.c 1.18 2004/10/23 13:35:08 kls Exp $
*/
#include "transfer.h"
#define TRANSFERBUFSIZE MEGABYTE(2)
#define POLLTIMEOUTS_BEFORE_DEVICECLEAR 3
// --- cTransfer -------------------------------------------------------------
cTransfer::cTransfer(int VPid, int APid1, int APid2, int DPid1, int DPid2)
:cReceiver(0, -1, 5, VPid, APid1, APid2, DPid1, DPid2)
,cThread("transfer")
{
ringBuffer = new cRingBufferLinear(TRANSFERBUFSIZE, TS_SIZE * 2, true, "Transfer");
remux = new cRemux(VPid, APid1, APid2, DPid1, DPid2);
canToggleAudioTrack = false;
audioTrack = 0xC0;
active = false;
}
cTransfer::~cTransfer()
{
cReceiver::Detach();
cPlayer::Detach();
delete remux;
delete ringBuffer;
}
void cTransfer::Activate(bool On)
{
if (On) {
if (!active)
Start();
}
else if (active) {
active = false;
Cancel(3);
}
}
void cTransfer::Receive(uchar *Data, int Length)
{
if (IsAttached() && active) {
int p = ringBuffer->Put(Data, Length);
if (p != Length && active)
ringBuffer->ReportOverflow(Length - p);
return;
}
}
void cTransfer::Action(void)
{
int PollTimeouts = 0;
uchar *p = NULL;
int Result = 0;
active = true;
while (active) {
int Count;
uchar *b = ringBuffer->Get(Count);
if (b) {
if (ringBuffer->Available() > TRANSFERBUFSIZE * 9 / 10) {
// If the buffer runs full, we have no chance of ever catching up
// since the data comes in at the same rate as it goes out (it's "live").
// So let's clear the buffer instead of suffering from permanent
// overflows.
dsyslog("clearing transfer buffer to avoid overflows");
ringBuffer->Clear();
remux->Clear();
p = NULL;
continue;
}
Count = remux->Put(b, Count);
if (Count)
ringBuffer->Del(Count);
}
if (!p && (p = remux->Get(Result)) != NULL)
StripAudioPackets(p, Result, audioTrack);
if (p) {
cPoller Poller;
if (DevicePoll(Poller, 100)) {
PollTimeouts = 0;
int w = PlayVideo(p, Result);
if (w > 0) {
p += w;
Result -= w;
remux->Del(w);
if (Result <= 0)
p = NULL;
}
else if (w < 0 && FATALERRNO)
LOG_ERROR;
}
else {
PollTimeouts++;
if (PollTimeouts == POLLTIMEOUTS_BEFORE_DEVICECLEAR) {
dsyslog("clearing device because of consecutive poll timeouts");
DeviceClear();
ringBuffer->Clear();
remux->Clear();
p = NULL;
}
}
}
}
active = false;
}
void cTransfer::StripAudioPackets(uchar *b, int Length, uchar Except)
{
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*/
}
}
int cTransfer::NumAudioTracks(void) const
{
return canToggleAudioTrack ? 2 : 1;
}
const char **cTransfer::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 cTransfer::SetAudioTrack(int Index)
{
if ((audioTrack == 0xC0) != (Index == 0)) {
audioTrack = (Index == 1) ? 0xC1 : 0xC0;
DeviceClear();
}
}
// --- cTransferControl ------------------------------------------------------
cDevice *cTransferControl::receiverDevice = NULL;
cTransferControl::cTransferControl(cDevice *ReceiverDevice, int VPid, int APid1, int APid2, int DPid1, int DPid2)
:cControl(transfer = new cTransfer(VPid, APid1, APid2, DPid1, DPid2), true)
{
ReceiverDevice->AttachReceiver(transfer);
receiverDevice = ReceiverDevice;
}
cTransferControl::~cTransferControl()
{
receiverDevice = NULL;
delete transfer;
}
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