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vdr/device.c

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/*
* device.c: The basic device interface
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: device.c 1.33 2002/11/01 11:08:57 kls Exp $
*/
#include "device.h"
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include "channels.h"
#include "eit.h"
#include "i18n.h"
#include "player.h"
#include "receiver.h"
#include "status.h"
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#include "transfer.h"
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// --- cDevice ---------------------------------------------------------------
// The default priority for non-primary devices:
#define DEFAULTPRIORITY -2
// The maximum time we wait before assuming that a recorded video data stream
// is broken:
#define MAXBROKENTIMEOUT 30 // seconds
int cDevice::numDevices = 0;
int cDevice::useDevice = 0;
int cDevice::nextCardIndex = 0;
int cDevice::currentChannel = 0;
cDevice *cDevice::device[MAXDEVICES] = { NULL };
cDevice *cDevice::primaryDevice = NULL;
cDevice::cDevice(void)
{
cardIndex = nextCardIndex++;
SetVideoFormat(Setup.VideoFormat);
active = false;
mute = false;
volume = Setup.CurrentVolume;
player = NULL;
playerDetached = false;
for (int i = 0; i < MAXRECEIVERS; i++)
receiver[i] = NULL;
if (numDevices < MAXDEVICES) {
device[numDevices++] = this;
SetCaCaps(cardIndex);
}
else
esyslog("ERROR: too many devices!");
}
cDevice::~cDevice()
{
Detach(player);
for (int i = 0; i < MAXRECEIVERS; i++)
Detach(receiver[i]);
}
void cDevice::SetUseDevice(int n)
{
if (n < MAXDEVICES)
useDevice |= (1 << n);
}
int cDevice::NextCardIndex(int n)
{
if (n > 0) {
nextCardIndex += n;
if (nextCardIndex >= MAXDEVICES)
esyslog("ERROR: nextCardIndex too big (%d)", nextCardIndex);
}
else if (n < 0)
esyslog("ERROR: illegal value in IncCardIndex(%d)", n);
return nextCardIndex;
}
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int cDevice::DeviceNumber(void) const
{
for (int i = 0; i < numDevices; i++) {
if (device[i] == this)
return i;
}
return -1;
}
void cDevice::MakePrimaryDevice(bool On)
{
}
bool cDevice::SetPrimaryDevice(int n)
{
n--;
if (0 <= n && n < numDevices && device[n]) {
isyslog("setting primary device to %d", n + 1);
if (primaryDevice)
primaryDevice->MakePrimaryDevice(false);
primaryDevice = device[n];
primaryDevice->MakePrimaryDevice(true);
return true;
}
esyslog("invalid primary device number: %d", n + 1);
return false;
}
bool cDevice::HasDecoder(void) const
{
return false;
}
bool cDevice::PlayerDetached(void)
{
bool result = playerDetached;
playerDetached = false;
return result;
}
cOsdBase *cDevice::NewOsd(int x, int y)
{
return NULL;
}
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cSpuDecoder *cDevice::GetSpuDecoder(void)
{
return NULL;
}
cDevice *cDevice::GetDevice(int Index)
{
return (0 <= Index && Index < numDevices) ? device[Index] : NULL;
}
cDevice *cDevice::GetDevice(const cChannel *Channel, int Priority, bool *NeedsDetachReceivers)
{
cDevice *d = NULL;
for (int i = 0; i < numDevices; i++) {
bool ndr;
if (device[i]->ProvidesChannel(Channel, Priority, &ndr) // this device is basicly able to do the job
&& (!d // we don't have a device yet, or...
|| (device[i]->Receiving() && !ndr) // ...this one is already receiving and allows additional receivers, or...
|| !d->Receiving() // ...the one we have is not receiving...
&& (device[i]->Priority() < d->Priority() // ...this one has an even lower Priority, or...
|| device[i]->Priority() == d->Priority() // ...same Priority...
&& device[i]->ProvidesCa(Channel->Ca()) < d->ProvidesCa(Channel->Ca()) // ...but this one provides fewer Ca values
)
)
) {
d = device[i];
if (NeedsDetachReceivers)
*NeedsDetachReceivers = ndr;
}
}
/*XXX+ too complex with multiple recordings per device
if (!d && Ca > MAXDEVICES) {
// We didn't find one the easy way, so now we have to try harder:
int ShiftLevel = -1;
for (int i = 0; i < numDevices; i++) {
if (Provides[i]) { // this device is basicly able to do the job, but for some reason we didn't get it above
int sl = device[i]->CanShift(Ca, Priority); // asks this device to shift its job to another device
if (sl >= 0 && (ShiftLevel < 0 || sl < ShiftLevel)) {
d = device[i]; // found one that can be shifted with the fewest number of subsequent shifts
ShiftLevel = sl;
}
}
}
}
XXX*/
return d;
}
void cDevice::SetCaCaps(int Index)
{
for (int d = 0; d < numDevices; d++) {
if (Index < 0 || Index == device[d]->CardIndex()) {
for (int i = 0; i < MAXCACAPS; i++)
device[d]->caCaps[i] = Setup.CaCaps[device[d]->CardIndex()][i];
}
}
}
void cDevice::Shutdown(void)
{
for (int i = 0; i < numDevices; i++) {
delete device[i];
device[i] = NULL;
}
primaryDevice = NULL;
}
bool cDevice::GrabImage(const char *FileName, bool Jpeg, int Quality, int SizeX, int SizeY)
{
return false;
}
void cDevice::SetVideoFormat(bool VideoFormat16_9)
{
}
//#define PRINTPIDS(s) { char b[500]; char *q = b; q += sprintf(q, "%d %s ", CardIndex(), s); for (int i = 0; i < MAXPIDHANDLES; i++) q += sprintf(q, " %s%4d %d", i == ptOther ? "* " : "", pidHandles[i].pid, pidHandles[i].used); dsyslog(b); }
#define PRINTPIDS(s)
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bool cDevice::HasPid(int Pid) const
{
for (int i = 0; i < MAXPIDHANDLES; i++) {
if (pidHandles[i].pid == Pid)
return true;
}
return false;
}
bool cDevice::AddPid(int Pid, ePidType PidType)
{
if (Pid) {
int n = -1;
int a = -1;
for (int i = 0; i < MAXPIDHANDLES; i++) {
if (pidHandles[i].pid == Pid)
n = i;
else if (a < 0 && i >= ptOther && !pidHandles[i].used)
a = i;
}
if (n >= 0) {
// The Pid is already in use
if (++pidHandles[n].used == 2 && n <= ptTeletext) {
// It's a special PID that may have to be switched into "tap" mode
PRINTPIDS("A");
return SetPid(&pidHandles[n], n, true);
}
PRINTPIDS("a");
return true;
}
else if (PidType < ptOther) {
// The Pid is not yet in use and it is a special one
n = PidType;
}
else if (a >= 0) {
// The Pid is not yet in use and we have a free slot
n = a;
}
else
esyslog("ERROR: no free slot for PID %d", Pid);
if (n >= 0) {
pidHandles[n].pid = Pid;
pidHandles[n].used = 1;
PRINTPIDS("C");
return SetPid(&pidHandles[n], n, true);
}
}
return true;
}
void cDevice::DelPid(int Pid)
{
if (Pid) {
for (int i = 0; i < MAXPIDHANDLES; i++) {
if (pidHandles[i].pid == Pid) {
PRINTPIDS("D");
if (--pidHandles[i].used < 2) {
SetPid(&pidHandles[i], i, false);
if (pidHandles[i].used == 0) {
pidHandles[i].handle = -1;
pidHandles[i].pid = 0;
}
}
PRINTPIDS("E");
}
}
}
}
bool cDevice::SetPid(cPidHandle *Handle, int Type, bool On)
{
return false;
}
bool cDevice::ProvidesSource(int Source) const
{
return false;
}
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bool cDevice::ProvidesChannel(const cChannel *Channel, int Priority, bool *NeedsDetachReceivers) const
{
return false;
}
bool cDevice::SwitchChannel(const cChannel *Channel, bool LiveView)
{
if (LiveView)
isyslog("switching to channel %d", Channel->Number());
for (int i = 3; i--;) {
switch (SetChannel(Channel, LiveView)) {
case scrOk: return true;
case scrNotAvailable: if (Interface)
Interface->Error(tr("Channel not available!"));
return false;
case scrNoTransfer: if (Interface)
Interface->Error(tr("Can't start Transfer Mode!"));
return false;
case scrFailed: break; // loop will retry
}
esyslog("retrying");
}
return false;
}
bool cDevice::SwitchChannel(int Direction)
{
bool result = false;
Direction = sgn(Direction);
if (Direction) {
int n = CurrentChannel() + Direction;
int first = n;
cChannel *channel;
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while ((channel = Channels.GetByNumber(n, Direction)) != NULL) {
// try only channels which are currently available
if (PrimaryDevice()->ProvidesChannel(channel, Setup.PrimaryLimit) || PrimaryDevice()->CanReplay() && GetDevice(channel, 0))
break;
n = channel->Number() + Direction;
}
if (channel) {
int d = n - first;
if (abs(d) == 1)
dsyslog("skipped channel %d", first);
else if (d)
dsyslog("skipped channels %d..%d", first, n - sgn(d));
if (PrimaryDevice()->SwitchChannel(channel, true))
result = true;
}
else if (n != first && Interface)
Interface->Error(tr("Channel not available!"));
}
return result;
}
eSetChannelResult cDevice::SetChannel(const cChannel *Channel, bool LiveView)
{
if (LiveView)
StopReplay();
// If this card can't receive this channel, we must not actually switch
// the channel here, because that would irritate the driver when we
// start replaying in Transfer Mode immediately after switching the channel:
bool NeedsTransferMode = (LiveView && IsPrimaryDevice() && !ProvidesChannel(Channel, Setup.PrimaryLimit));
eSetChannelResult Result = scrOk;
// If this DVB card can't receive this channel, let's see if we can
// use the card that actually can receive it and transfer data from there:
if (NeedsTransferMode) {
cDevice *CaDevice = GetDevice(Channel, 0);
if (CaDevice && CanReplay()) {
cStatus::MsgChannelSwitch(this, 0); // only report status if we are actually going to switch the channel
if (CaDevice->SetChannel(Channel, false) == scrOk) // calling SetChannel() directly, not SwitchChannel()!
cControl::Launch(new cTransferControl(CaDevice, Channel->Vpid(), Channel->Apid1(), Channel->Apid2(), Channel->Dpid1(), Channel->Dpid2()));//XXX+
else
Result = scrNoTransfer;
}
else
Result = scrNotAvailable;
}
else {
cStatus::MsgChannelSwitch(this, 0); // only report status if we are actually going to switch the channel
if (!SetChannelDevice(Channel, LiveView))
Result = scrFailed;
}
if (Result == scrOk) {
if (LiveView && IsPrimaryDevice()) {
cSIProcessor::SetCurrentServiceID(Channel->Sid());
currentChannel = Channel->Number();
}
cStatus::MsgChannelSwitch(this, Channel->Number()); // only report status if channel switch successfull
}
return Result;
}
bool cDevice::SetChannelDevice(const cChannel *Channel, bool LiveView)
{
return false;
}
void cDevice::SetVolumeDevice(int Volume)
{
}
int cDevice::NumAudioTracksDevice(void) const
{
return 0;
}
const char **cDevice::GetAudioTracksDevice(int *CurrentTrack) const
{
return NULL;
}
void cDevice::SetAudioTrackDevice(int Index)
{
}
bool cDevice::ToggleMute(void)
{
int OldVolume = volume;
mute = !mute;
SetVolume(0, mute);
volume = OldVolume;
return mute;
}
void cDevice::SetVolume(int Volume, bool Absolute)
{
volume = min(max(Absolute ? Volume : volume + Volume, 0), MAXVOLUME);
SetVolumeDevice(volume);
cStatus::MsgSetVolume(volume, Absolute);
if (volume > 0)
mute = false;
}
int cDevice::NumAudioTracks(void) const
{
return player ? player->NumAudioTracks() : NumAudioTracksDevice();
}
const char **cDevice::GetAudioTracks(int *CurrentTrack) const
{
return player ? player->GetAudioTracks(CurrentTrack) : GetAudioTracksDevice(CurrentTrack);
}
void cDevice::SetAudioTrack(int Index)
{
if (player)
player->SetAudioTrack(Index);
else
SetAudioTrackDevice(Index);
}
bool cDevice::CanReplay(void) const
{
return HasDecoder();
}
bool cDevice::SetPlayMode(ePlayMode PlayMode)
{
return false;
}
void cDevice::TrickSpeed(int Speed)
{
}
void cDevice::Clear(void)
{
}
void cDevice::Play(void)
{
}
void cDevice::Freeze(void)
{
}
void cDevice::Mute(void)
{
}
void cDevice::StillPicture(const uchar *Data, int Length)
{
}
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bool cDevice::Replaying(void) const
{
return player != NULL;
}
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bool cDevice::AttachPlayer(cPlayer *Player)
{
if (CanReplay()) {
if (player)
Detach(player);
player = Player;
player->device = this;
SetPlayMode(player->playMode);
player->Activate(true);
return true;
}
return false;
}
void cDevice::Detach(cPlayer *Player)
{
if (Player && player == Player) {
player->Activate(false);
player->device = NULL;
player = NULL;
SetPlayMode(pmNone);
playerDetached = true;
}
}
void cDevice::StopReplay(void)
{
if (player) {
Detach(player);
if (IsPrimaryDevice())
cControl::Shutdown();
}
}
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bool cDevice::Poll(cPoller &Poller, int TimeoutMs)
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{
return false;
}
int cDevice::PlayVideo(const uchar *Data, int Length)
{
return -1;
}
int cDevice::PlayAudio(const uchar *Data, int Length)
{
return -1;
}
int cDevice::Ca(void) const
{
int ca = 0;
for (int i = 0; i < MAXRECEIVERS; i++) {
if (receiver[i] && (ca = receiver[i]->ca) != 0)
break; // all receivers have the same ca
}
return ca;
}
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int cDevice::Priority(void) const
{
int priority = IsPrimaryDevice() ? Setup.PrimaryLimit - 1 : DEFAULTPRIORITY;
for (int i = 0; i < MAXRECEIVERS; i++) {
if (receiver[i])
priority = max(receiver[i]->priority, priority);
}
return priority;
}
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int cDevice::CanShift(int Ca, int Priority, int UsedCards) const
{
return -1;//XXX+ too complex with multiple recordings per device
// Test whether a receiver on this device can be shifted to another one
// in order to perform a new receiving with the given Ca and Priority on this device:
int ShiftLevel = -1; // default means this device can't be shifted
if (UsedCards & (1 << CardIndex()) != 0)
return ShiftLevel; // otherwise we would get into a loop
if (Receiving()) {
if (ProvidesCa(Ca) // this device provides the requested Ca
&& (Ca != this->Ca() // the requested Ca is different from the one currently used...
|| Priority > this->Priority())) { // ...or the request comes from a higher priority
cDevice *d = NULL;
int Provides[MAXDEVICES];
UsedCards |= (1 << CardIndex());
for (int i = 0; i < numDevices; i++) {
if ((Provides[i] = device[i]->ProvidesCa(this->Ca())) != 0) { // this device is basicly able to do the job
if (device[i] != this) { // it is not _this_ device
int sl = device[i]->CanShift(this->Ca(), Priority, UsedCards); // this is the original Priority!
if (sl >= 0 && (ShiftLevel < 0 || sl < ShiftLevel)) {
d = device[i];
ShiftLevel = sl;
}
}
}
}
if (ShiftLevel >= 0)
ShiftLevel++; // adds the device's own shift
}
}
else if (Priority > this->Priority())
ShiftLevel = 0; // no shifting necessary, this device can do the job
return ShiftLevel;
}
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int cDevice::ProvidesCa(int Ca) const
{
if (Ca == CardIndex() + 1)
return 1; // exactly _this_ card was requested
if (Ca && Ca <= MAXDEVICES)
return 0; // a specific card was requested, but not _this_ one
int result = Ca ? 0 : 1; // by default every card can provide FTA
int others = Ca ? 1 : 0;
for (int i = 0; i < MAXCACAPS; i++) {
if (caCaps[i]) {
if (caCaps[i] == Ca)
result = 1;
else
others++;
}
}
return result ? result + others : 0;
}
bool cDevice::Receiving(bool CheckAny) const
{
for (int i = 0; i < MAXRECEIVERS; i++) {
if (receiver[i] && (CheckAny || receiver[i]->priority >= 0)) // cReceiver with priority < 0 doesn't count
return true;
}
return false;
}
void cDevice::Action(void)
{
dsyslog("receiver thread started on device %d (pid=%d)", CardIndex() + 1, getpid());
if (OpenDvr()) {
time_t t = time(NULL);
active = true;
for (; active;) {
// Read data from the DVR device:
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uchar *b = NULL;
if (GetTSPacket(b)) {
if (b) {
int Pid = (((uint16_t)b[1] & PID_MASK_HI) << 8) | b[2];
// Distribute the packet to all attached receivers:
Lock();
for (int i = 0; i < MAXRECEIVERS; i++) {
if (receiver[i] && receiver[i]->WantsPid(Pid))
receiver[i]->Receive(b, TS_SIZE);
}
Unlock();
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t = time(NULL);
}
}
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else
break;
//XXX+ put this into the recorder??? or give the receiver a flag whether it wants this?
if (time(NULL) - t > MAXBROKENTIMEOUT) {
esyslog("ERROR: video data stream broken on device %d", CardIndex() + 1);
cThread::EmergencyExit(true);
t = time(NULL);
}
}
CloseDvr();
}
dsyslog("receiver thread ended on device %d (pid=%d)", CardIndex() + 1, getpid());
}
bool cDevice::OpenDvr(void)
{
return false;
}
void cDevice::CloseDvr(void)
{
}
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bool cDevice::GetTSPacket(uchar *&Data)
{
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return false;
}
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bool cDevice::AttachReceiver(cReceiver *Receiver)
{
if (!Receiver)
return false;
if (Receiver->device == this)
return true;
for (int i = 0; i < MAXRECEIVERS; i++) {
if (!receiver[i]) {
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for (int n = 0; n < MAXRECEIVEPIDS; n++)
AddPid(Receiver->pids[n]);//XXX+ retval!
Receiver->Activate(true);
Lock();
Receiver->device = this;
receiver[i] = Receiver;
Unlock();
Start();
return true;
}
}
esyslog("ERROR: no free receiver slot!");
return false;
}
void cDevice::Detach(cReceiver *Receiver)
{
if (!Receiver || Receiver->device != this)
return;
bool receiversLeft = false;
for (int i = 0; i < MAXRECEIVERS; i++) {
if (receiver[i] == Receiver) {
Receiver->Activate(false);
Lock();
receiver[i] = NULL;
Receiver->device = NULL;
Unlock();
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for (int n = 0; n < MAXRECEIVEPIDS; n++)
DelPid(Receiver->pids[n]);
}
else if (receiver[i])
receiversLeft = true;
}
if (!receiversLeft) {
active = false;
Cancel(3);
}
}
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// --- cTSBuffer -------------------------------------------------------------
cTSBuffer::cTSBuffer(int File, int Size, int CardIndex)
{
f = File;
size = Size / TS_SIZE * TS_SIZE;
cardIndex = CardIndex;
tsRead = tsWrite = 0;
buf = (f >= 0 && size >= TS_SIZE) ? MALLOC(uchar, size + TS_SIZE) : NULL;
// the '+ TS_SIZE' allocates some extra space for handling packets that got split by a buffer roll-over
firstRead = true;
}
cTSBuffer::~cTSBuffer()
{
free(buf);
}
int cTSBuffer::Read(void)
{
if (buf) {
cPoller Poller(f, false);
bool repeat;
int total = 0;
do {
repeat = false;
if (firstRead || Used() > TS_SIZE || Poller.Poll(100)) { // only wait if there's not enough data in the buffer
firstRead = false;
if (tsRead == tsWrite)
tsRead = tsWrite = 0; // keep the maximum buffer space available
if (tsWrite >= size && tsRead > 0)
tsWrite = 0;
int free = tsRead <= tsWrite ? size - tsWrite : tsRead - tsWrite - 1;
if (free > 0) {
int r = read(f, buf + tsWrite, free);
if (r > 0) {
total += r;
tsWrite += r;
if (tsWrite >= size && tsRead > 0) {
tsWrite = 0;
repeat = true; // read again after a boundary roll-over
}
}
}
}
} while (repeat);
return total;
}
return -1;
}
uchar *cTSBuffer::Get(void)
{
if (Used() >= TS_SIZE) {
uchar *p = buf + tsRead;
if (*p != TS_SYNC_BYTE) {
esyslog("ERROR: not sync'ed to TS packet on device %d", cardIndex);
int tsMax = tsRead < tsWrite ? tsWrite : size;
for (int i = tsRead; i < tsMax; i++) {
if (buf[i] == TS_SYNC_BYTE) {
esyslog("ERROR: skipped %d bytes to sync on TS packet on device %d", i - tsRead, cardIndex);
tsRead = i;
return NULL;
}
}
if ((tsRead = tsMax) >= size)
tsRead = 0;
return NULL;
}
if (tsRead + TS_SIZE > size) {
// the packet rolled over the buffer boundary, so let's fetch the rest from the beginning (which MUST be there, since Used() >= TS_SIZE)
int rest = TS_SIZE - (size - tsRead);
memcpy(buf + size, buf, rest);
tsRead = rest;
}
else if ((tsRead += TS_SIZE) >= size)
tsRead = 0;
return p;
}
return NULL;
}