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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 1.12 2003/05/11 08:48:05 kls Exp $
*/
#include "transfer.h"
//XXX+ also used in recorder.c - find a better place???
// The size of the array used to buffer video data:
// (must be larger than MINVIDEODATA - see remux.h)
#define VIDEOBUFSIZE MEGABYTE(1)
// --- cTransfer -------------------------------------------------------------
cTransfer::cTransfer(int VPid, int APid1, int APid2, int DPid1, int DPid2)
:cReceiver(0, -1, 5, VPid, APid1, APid2, DPid1, DPid2)
{
ringBuffer = new cRingBufferLinear(VIDEOBUFSIZE, TS_SIZE * 2, true);
remux = new cRemux(VPid, APid1, APid2, DPid1, DPid2);
canToggleAudioTrack = false;
audioTrack = 0xC0;
gotBufferReserve = false;
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()) {
int i = 0;
while (active && Length > 0) {
if (i++ > 10) {
esyslog("ERROR: ring buffer overflow (%d bytes dropped)", Length);
break;
}
int p = ringBuffer->Put(Data, Length);
Length -= p;
Data += p;
}
}
}
void cTransfer::Action(void)
{
dsyslog("transfer thread started (pid=%d)", getpid());
active = true;
while (active) {
//XXX+ Maybe we need this to avoid "buffer empty" log messages from the driver.
//XXX+ But then again, it appears to play just fine without this...
/*
if (!gotBufferReserve) {
if (ringBuffer->Available() < 4 * MAXFRAMESIZE) {
usleep(100000); // allow the buffer to collect some reserve
continue;
}
else
gotBufferReserve = true;
}
*/
// Get data from the buffer:
int r;
const uchar *b = ringBuffer->Get(r);
// Play the data:
if (b) {
int Count = r, Result;
uchar *p = remux->Process(b, Count, Result);
ringBuffer->Del(Count);
if (p) {
StripAudioPackets(p, Result, audioTrack);
while (Result > 0 && active) {
cPoller Poller;
if (DevicePoll(Poller, 100)) {
int w = PlayVideo(p, Result);
if (w > 0) {
p += w;
Result -= w;
}
else if (w < 0 && FATALERRNO) {
LOG_ERROR;
break;
}
}
}
}
}
else
usleep(1); // this keeps the CPU load low
}
dsyslog("transfer thread ended (pid=%d)", getpid());
}
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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