vdr-plugin-streamdev/remux/tsremux.c
schmirl 008e7c8510 - added namespace to remuxers
- increased WRITERBUFSIZE - buffer was too small for high bandwidth content
- removed cStreamdevStreamer::m_Running
- eliminated potential busy waits in remuxers
- updated cTSRemux static helpers to code of their VDR 1.6.0 counterparts
- re-enabled PES vor VDR 1.7.3+. Streamdev now uses a copy of VDR 1.6.0's
  cRemux for TS to PES remuxing.
- make sure that only complete TS packets are written to ringbuffers
- use signaling instead of sleeps when writing to ringbuffers
- optimized cStreamdevPatFilter PAT packet initialization
- fixed cStreamdevPatFilter not processing PATs with length > TS_SIZE - 5
- use a small ringbuffer for cStreamdevPatFilter instead of writing to
  cStreamdevStreamers SendBuffer as two threads mustn't write to the same
  ringbuffer

Modified Files:
	CONTRIBUTORS HISTORY Makefile common.c common.h
	streamdev-server.c libdvbmpeg/transform.h remux/extern.c
	remux/extern.h remux/ts2es.c remux/ts2es.h remux/ts2ps.c
	remux/ts2ps.h remux/tsremux.c remux/tsremux.h
	server/connectionHTTP.c server/connectionVTP.c
	server/livestreamer.c server/livestreamer.h server/menuHTTP.c
	server/streamer.c server/streamer.h
Added Files:
	remux/ts2pes.c remux/ts2pes.h
2009-06-19 06:32:38 +00:00

88 lines
3.1 KiB
C

#include "remux/tsremux.h"
#define SC_PICTURE 0x00 // "picture header"
#define PID_MASK_HI 0x1F
#define VIDEO_STREAM_S 0xE0
using namespace Streamdev;
void cTSRemux::SetBrokenLink(uchar *Data, int Length)
{
int PesPayloadOffset = 0;
if (AnalyzePesHeader(Data, Length, PesPayloadOffset) >= phMPEG1 && (Data[3] & 0xF0) == VIDEO_STREAM_S) {
for (int i = PesPayloadOffset; i < Length - 7; i++) {
if (Data[i] == 0 && Data[i + 1] == 0 && Data[i + 2] == 1 && Data[i + 3] == 0xB8) {
if (!(Data[i + 7] & 0x40)) // set flag only if GOP is not closed
Data[i + 7] |= 0x20;
return;
}
}
dsyslog("SetBrokenLink: no GOP header found in video packet");
}
else
dsyslog("SetBrokenLink: no video packet in frame");
}
int cTSRemux::GetPid(const uchar *Data)
{
return (((uint16_t)Data[0] & PID_MASK_HI) << 8) | (Data[1] & 0xFF);
}
int cTSRemux::GetPacketLength(const uchar *Data, int Count, int Offset)
{
// Returns the length of the packet starting at Offset, or -1 if Count is
// too small to contain the entire packet.
int Length = (Offset + 5 < Count) ? (Data[Offset + 4] << 8) + Data[Offset + 5] + 6 : -1;
if (Length > 0 && Offset + Length <= Count)
return Length;
return -1;
}
int cTSRemux::ScanVideoPacket(const uchar *Data, int Count, int Offset, uchar &PictureType)
{
// Scans the video packet starting at Offset and returns its length.
// If the return value is -1 the packet was not completely in the buffer.
int Length = GetPacketLength(Data, Count, Offset);
if (Length > 0) {
int PesPayloadOffset = 0;
if (AnalyzePesHeader(Data + Offset, Length, PesPayloadOffset) >= phMPEG1) {
const uchar *p = Data + Offset + PesPayloadOffset + 2;
const uchar *pLimit = Data + Offset + Length - 3;
#ifdef TEST_cVideoRepacker
// cVideoRepacker ensures that a new PES packet is started for a new sequence,
// group or picture which allows us to easily skip scanning through a huge
// amount of video data.
if (p < pLimit) {
if (p[-2] || p[-1] || p[0] != 0x01)
pLimit = 0; // skip scanning: packet doesn't start with 0x000001
else {
switch (p[1]) {
case SC_SEQUENCE:
case SC_GROUP:
case SC_PICTURE:
break;
default: // skip scanning: packet doesn't start a new sequence, group or picture
pLimit = 0;
}
}
}
#endif
while (p < pLimit && (p = (const uchar *)memchr(p, 0x01, pLimit - p))) {
if (!p[-2] && !p[-1]) { // found 0x000001
switch (p[1]) {
case SC_PICTURE: PictureType = (p[3] >> 3) & 0x07;
return Length;
}
p += 4; // continue scanning after 0x01ssxxyy
}
else
p += 3; // continue scanning after 0x01xxyy
}
}
PictureType = NO_PICTURE;
return Length;
}
return -1;
}