vdr
2.2.0
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#include <device.h>
Public Member Functions | |
cTSBuffer (int File, int Size, int CardIndex) | |
virtual | ~cTSBuffer () |
uchar * | Get (int *Available=NULL) |
void | Skip (int Count) |
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cThread (const char *Description=NULL, bool LowPriority=false) | |
virtual | ~cThread () |
void | SetDescription (const char *Description,...) __attribute__((format(printf |
void bool | Start (void) |
bool | Active (void) |
Private Member Functions | |
virtual void | Action (void) |
Private Attributes | |
int | f |
int | cardIndex |
bool | delivered |
cRingBufferLinear * | ringBuffer |
Additional Inherited Members | |
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static tThreadId | ThreadId (void) |
static tThreadId | IsMainThread (void) |
static void | SetMainThreadId (void) |
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void | SetPriority (int Priority) |
void | SetIOPriority (int Priority) |
void | Lock (void) |
void | Unlock (void) |
bool | Running (void) |
void | Cancel (int WaitSeconds=0) |
Derived cDevice classes that can receive channels will have to provide Transport Stream (TS) packets one at a time.
cTSBuffer implements a simple buffer that allows the device to read a larger amount of data from the driver with each call to Read(), thus avoiding the overhead of getting each TS packet separately from the driver. It also makes sure the returned data points to a TS packet and automatically re-synchronizes after broken packets.
cTSBuffer::cTSBuffer | ( | int | File, |
int | Size, | ||
int | CardIndex | ||
) |
Definition at line 1756 of file device.c.
References cDevice::cardIndex, cDevice::CardIndex(), cThread::SetDescription(), cThread::Start(), and TS_SIZE.
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virtual |
Definition at line 1768 of file device.c.
References cThread::Cancel().
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privatevirtual |
A derived cThread class must implement the code it wants to execute as a separate thread in this function.
If this is a loop, it must check Running() repeatedly to see whether it's time to stop.
Implements cThread.
Definition at line 1774 of file device.c.
References cDevice::cardIndex, esyslog, FATALERRNO, LOG_ERROR, cPoller::Poll(), and cThread::Running().
uchar * cTSBuffer::Get | ( | int * | Available = NULL | ) |
Returns a pointer to the first TS packet in the buffer.
If Available is given, it will return the total number of consecutive bytes pointed to in the buffer. It is guaranteed that the returned pointer points to a TS_SYNC_BYTE and that there are at least TS_SIZE bytes in the buffer. Otherwise NULL will be returned and the value in Available (if given) is undefined. Each call to Get() returns a pointer to the next TS packet in the buffer.
Definition at line 1796 of file device.c.
References cDevice::cardIndex, esyslog, TS_SIZE, and TS_SYNC_BYTE.
void cTSBuffer::Skip | ( | int | Count | ) |
If after a call to Get() more or less than TS_SIZE of the available data has been processed, a call to Skip() with the number of processed bytes will disable the automatic incrementing of the data pointer as described in Get() and skip the given number of bytes instead.
Count may be 0 if the caller wants the previous TS packet to be delivered again in the next call to Get().
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private |