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Code Issues Releases Wiki Activity

Revoked the changes to cFrameDetector that have been introduced in version 1.7.19

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This commit is contained in:
Klaus Schmidinger 2011-09-04 10:13:14 +02:00
parent 6c110a7272
commit 96061c5b40
5 changed files with 32 additions and 107 deletions
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3
HISTORY
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@ -6699,7 +6699,7 @@ Video Disk Recorder Revision History
constructor is negative (avoids the "cTimeMs: using monotonic clock..." log message constructor is negative (avoids the "cTimeMs: using monotonic clock..." log message
before VDR's starting log message). before VDR's starting log message).
2011-08-27: Version 1.7.21 2011-09-04: Version 1.7.21
- Fixed detecting frames for channels that split frames into several payloads - Fixed detecting frames for channels that split frames into several payloads
(reported by Derek Kelly). (reported by Derek Kelly).
@ -6738,3 +6738,4 @@ Video Disk Recorder Revision History
receiving on SD FF devices and uses the device only for output (thanks to Udo receiving on SD FF devices and uses the device only for output (thanks to Udo
Richter). Richter).
- Fixed detecting frames on radio channels (reported by Chris Mayo). - Fixed detecting frames on radio channels (reported by Chris Mayo).
- Revoked the changes to cFrameDetector that have been introduced in version 1.7.19.

50
recorder.c
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and * See the main source file 'vdr.c' for copyright information and
* how to reach the author. * how to reach the author.
* *
* $Id: recorder.c 2.14 2011/08/13 14:56:36 kls Exp $ * $Id: recorder.c 2.15 2011/09/04 09:26:44 kls Exp $
*/ */
#include "recorder.h" #include "recorder.h"
@ -31,7 +31,7 @@ cRecorder::cRecorder(const char *FileName, const cChannel *Channel, int Priority
SpinUpDisk(FileName); SpinUpDisk(FileName);
ringBuffer = new cRingBufferLinear(RECORDERBUFSIZE, TS_SIZE, true, "Recorder"); ringBuffer = new cRingBufferLinear(RECORDERBUFSIZE, MIN_TS_PACKETS_FOR_FRAME_DETECTOR * TS_SIZE, true, "Recorder");
ringBuffer->SetTimeouts(0, 100); ringBuffer->SetTimeouts(0, 100);
int Pid = Channel->Vpid(); int Pid = Channel->Vpid();
@ -88,7 +88,7 @@ bool cRecorder::RunningLowOnDiskSpace(void)
bool cRecorder::NextFile(void) bool cRecorder::NextFile(void)
{ {
if (recordFile) { if (recordFile && frameDetector->IndependentFrame()) { // every file shall start with an independent frame
if (fileSize > MEGABYTE(off_t(Setup.MaxVideoFileSize)) || RunningLowOnDiskSpace()) { if (fileSize > MEGABYTE(off_t(Setup.MaxVideoFileSize)) || RunningLowOnDiskSpace()) {
recordFile = fileName->NextFile(); recordFile = fileName->NextFile();
fileSize = 0; fileSize = 0;
@ -119,11 +119,6 @@ void cRecorder::Action(void)
time_t t = time(NULL); time_t t = time(NULL);
bool InfoWritten = false; bool InfoWritten = false;
bool FirstIframeSeen = false; bool FirstIframeSeen = false;
#define BUFFERSIZE (5 * TS_SIZE)
bool Buffering = false;
int BufferIndex = 0;
int MaxBufferIndex = 0;
uchar *Buffer = NULL;
while (Running()) { while (Running()) {
int r; int r;
uchar *b = ringBuffer->Get(r); uchar *b = ringBuffer->Get(r);
@ -144,34 +139,9 @@ void cRecorder::Action(void)
} }
InfoWritten = true; InfoWritten = true;
} }
if (frameDetector->NewPayload()) { // We're at the first TS packet of a new payload... if (FirstIframeSeen || frameDetector->IndependentFrame()) {
if (Buffering)
esyslog("ERROR: encountered new payload while buffering - dropping some data!");
if (!frameDetector->NewFrame()) { // ...but the frame type is yet unknown, so we need to buffer packets until we see the frame type
if (!Buffer) {
dsyslog("frame type not in first packet of payload - buffering");
if (!(Buffer = MALLOC(uchar, BUFFERSIZE))) {
esyslog("ERROR: can't allocate frame type buffer");
break;
}
}
BufferIndex = 0;
Buffering = true;
}
}
else if (frameDetector->NewFrame()) // now we know the frame type, so stop buffering
Buffering = false;
if (Buffering) {
if (BufferIndex + Count <= BUFFERSIZE) {
memcpy(Buffer + BufferIndex, b, Count);
BufferIndex += Count;
}
else
esyslog("ERROR: too many bytes for frame type buffer (%d > %d) - dropped %d bytes", BufferIndex + Count, int(BUFFERSIZE), Count);
}
else if (FirstIframeSeen || frameDetector->IndependentFrame()) {
FirstIframeSeen = true; // start recording with the first I-frame FirstIframeSeen = true; // start recording with the first I-frame
if (frameDetector->IndependentFrame() && !NextFile()) // every file shall start with an independent frame if (!NextFile())
break; break;
if (index && frameDetector->NewFrame()) if (index && frameDetector->NewFrame())
index->Write(frameDetector->IndependentFrame(), fileName->Number(), fileSize); index->Write(frameDetector->IndependentFrame(), fileName->Number(), fileSize);
@ -184,12 +154,6 @@ void cRecorder::Action(void)
fileSize += TS_SIZE; fileSize += TS_SIZE;
} }
} }
if (BufferIndex) {
recordFile->Write(Buffer, BufferIndex); // if an error occurs here, the next write below will catch and report it
if (BufferIndex > MaxBufferIndex)
MaxBufferIndex = BufferIndex;
BufferIndex = 0;
}
if (recordFile->Write(b, Count) < 0) { if (recordFile->Write(b, Count) < 0) {
LOG_ERROR_STR(fileName->Name()); LOG_ERROR_STR(fileName->Name());
break; break;
@ -207,8 +171,4 @@ void cRecorder::Action(void)
t = time(NULL); t = time(NULL);
} }
} }
if (Buffer) {
free(Buffer);
dsyslog("frame type buffer used %d bytes", MaxBufferIndex);
}
} }

15
recording.c
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and * See the main source file 'vdr.c' for copyright information and
* how to reach the author. * how to reach the author.
* *
* $Id: recording.c 2.37 2011/08/27 10:55:53 kls Exp $ * $Id: recording.c 2.38 2011/09/04 09:32:25 kls Exp $
*/ */
#include "recording.h" #include "recording.h"
@ -1434,12 +1434,11 @@ void cIndexFileGenerator::Action(void)
bool Rewind = false; bool Rewind = false;
cFileName FileName(recordingName, false); cFileName FileName(recordingName, false);
cUnbufferedFile *ReplayFile = FileName.Open(); cUnbufferedFile *ReplayFile = FileName.Open();
cRingBufferLinear Buffer(IFG_BUFFER_SIZE, TS_SIZE); cRingBufferLinear Buffer(IFG_BUFFER_SIZE, MIN_TS_PACKETS_FOR_FRAME_DETECTOR * TS_SIZE);
cPatPmtParser PatPmtParser; cPatPmtParser PatPmtParser;
cFrameDetector FrameDetector; cFrameDetector FrameDetector;
cIndexFile IndexFile(recordingName, true); cIndexFile IndexFile(recordingName, true);
int BufferChunks = KILOBYTE(1); // no need to read a lot at the beginning when parsing PAT/PMT int BufferChunks = KILOBYTE(1); // no need to read a lot at the beginning when parsing PAT/PMT
int FileNumber = 0;
off_t FileSize = 0; off_t FileSize = 0;
off_t FrameOffset = -1; off_t FrameOffset = -1;
Skins.QueueMessage(mtInfo, tr("Regenerating index file")); Skins.QueueMessage(mtInfo, tr("Regenerating index file"));
@ -1456,18 +1455,12 @@ void cIndexFileGenerator::Action(void)
if (Data) { if (Data) {
if (FrameDetector.Synced()) { if (FrameDetector.Synced()) {
// Step 3 - generate the index: // Step 3 - generate the index:
if (FrameOffset < 0 && TsPid(Data) == PATPID) { if (TsPid(Data) == PATPID)
FileNumber = FileName.Number();
FrameOffset = FileSize; // the PAT/PMT is at the beginning of an I-frame FrameOffset = FileSize; // the PAT/PMT is at the beginning of an I-frame
}
int Processed = FrameDetector.Analyze(Data, Length); int Processed = FrameDetector.Analyze(Data, Length);
if (Processed > 0) { if (Processed > 0) {
if (FrameDetector.NewPayload() && FrameOffset < 0) {
FileNumber = FileName.Number();
FrameOffset = FileSize;
}
if (FrameDetector.NewFrame()) { if (FrameDetector.NewFrame()) {
IndexFile.Write(FrameDetector.IndependentFrame(), FileNumber, FrameOffset); IndexFile.Write(FrameDetector.IndependentFrame(), FileName.Number(), FrameOffset >= 0 ? FrameOffset : FileSize);
FrameOffset = -1; FrameOffset = -1;
} }
FileSize += Processed; FileSize += Processed;

56
remux.c
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and * See the main source file 'vdr.c' for copyright information and
* how to reach the author. * how to reach the author.
* *
* $Id: remux.c 2.60 2011/08/27 14:20:18 kls Exp $ * $Id: remux.c 2.61 2011/09/04 10:13:14 kls Exp $
*/ */
#include "remux.h" #include "remux.h"
@ -785,8 +785,7 @@ cFrameDetector::cFrameDetector(int Pid, int Type)
{ {
SetPid(Pid, Type); SetPid(Pid, Type);
synced = false; synced = false;
newPayload = newFrame = independentFrame = false; newFrame = independentFrame = false;
frameTypeOffset = -1;
numPtsValues = 0; numPtsValues = 0;
numFrames = 0; numFrames = 0;
numIFrames = 0; numIFrames = 0;
@ -813,8 +812,7 @@ void cFrameDetector::SetPid(int Pid, int Type)
void cFrameDetector::Reset(void) void cFrameDetector::Reset(void)
{ {
newPayload = newFrame = independentFrame = false; newFrame = independentFrame = false;
frameTypeOffset = -1;
payloadUnitOfFrame = 0; payloadUnitOfFrame = 0;
scanning = false; scanning = false;
scanner = EMPTY_SCANNER; scanner = EMPTY_SCANNER;
@ -822,8 +820,9 @@ void cFrameDetector::Reset(void)
int cFrameDetector::Analyze(const uchar *Data, int Length) int cFrameDetector::Analyze(const uchar *Data, int Length)
{ {
int SeenPayloadStart = false;
int Processed = 0; int Processed = 0;
newPayload = newFrame = independentFrame = false; newFrame = independentFrame = false;
while (Length >= TS_SIZE) { while (Length >= TS_SIZE) {
if (Data[0] != TS_SYNC_BYTE) { if (Data[0] != TS_SYNC_BYTE) {
int Skipped = 1; int Skipped = 1;
@ -836,8 +835,11 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
int Pid = TsPid(Data); int Pid = TsPid(Data);
if (Pid == pid) { if (Pid == pid) {
if (TsPayloadStart(Data)) { if (TsPayloadStart(Data)) {
SeenPayloadStart = true;
if (synced && Processed) if (synced && Processed)
return Processed; // flush everything before this new payload return Processed;
if (Length < MIN_TS_PACKETS_FOR_FRAME_DETECTOR * TS_SIZE)
return Processed; // need more data, in case the frame type is not stored in the first TS packet
if (framesPerSecond <= 0.0) { if (framesPerSecond <= 0.0) {
// frame rate unknown, so collect a sequence of PTS values: // frame rate unknown, so collect a sequence of PTS values:
if (numPtsValues < 2 || numPtsValues < MaxPtsValues && numIFrames < 2) { // collect a sequence containing at least two I-frames if (numPtsValues < 2 || numPtsValues < MaxPtsValues && numIFrames < 2) { // collect a sequence containing at least two I-frames
@ -902,10 +904,6 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
if (scanning) { if (scanning) {
int PayloadOffset = TsPayloadOffset(Data); int PayloadOffset = TsPayloadOffset(Data);
if (TsPayloadStart(Data)) { if (TsPayloadStart(Data)) {
if (synced && Processed)
return Processed; // flush everything before this new payload
newPayload = true;
scanner = EMPTY_SCANNER;
PayloadOffset += PesPayloadOffset(Data + PayloadOffset); PayloadOffset += PesPayloadOffset(Data + PayloadOffset);
if (!framesPerPayloadUnit) if (!framesPerPayloadUnit)
framesPerPayloadUnit = framesInPayloadUnit; framesPerPayloadUnit = framesInPayloadUnit;
@ -913,29 +911,17 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
dbgframes("/"); dbgframes("/");
} }
for (int i = PayloadOffset; scanning && i < TS_SIZE; i++) { for (int i = PayloadOffset; scanning && i < TS_SIZE; i++) {
if (frameTypeOffset < 0) {
scanner <<= 8; scanner <<= 8;
scanner |= Data[i]; scanner |= Data[i];
}
else
frameTypeOffset += PayloadOffset;
switch (type) { switch (type) {
case 0x01: // MPEG 1 video case 0x01: // MPEG 1 video
case 0x02: // MPEG 2 video case 0x02: // MPEG 2 video
if (scanner == 0x00000100) { // Picture Start Code if (scanner == 0x00000100) { // Picture Start Code
if (frameTypeOffset < 0) {
frameTypeOffset = i + 2;
if (frameTypeOffset >= TS_SIZE) { // the byte to check is in the next TS packet
frameTypeOffset -= TS_SIZE;
if (!synced)
dbgframes("%d>", frameTypeOffset);
break;
}
}
scanner = EMPTY_SCANNER; scanner = EMPTY_SCANNER;
if (synced && !SeenPayloadStart && Processed)
return Processed; // flush everything before this new frame
newFrame = true; newFrame = true;
uchar FrameType = (Data[frameTypeOffset] >> 3) & 0x07; uchar FrameType = (Data[i + 2] >> 3) & 0x07;
frameTypeOffset = -1;
independentFrame = FrameType == 1; // I-Frame independentFrame = FrameType == 1; // I-Frame
if (synced) { if (synced) {
if (framesPerPayloadUnit <= 1) if (framesPerPayloadUnit <= 1)
@ -955,30 +941,20 @@ int cFrameDetector::Analyze(const uchar *Data, int Length)
break; break;
case 0x1B: // MPEG 4 video case 0x1B: // MPEG 4 video
if (scanner == 0x00000109) { // Access Unit Delimiter if (scanner == 0x00000109) { // Access Unit Delimiter
if (frameTypeOffset < 0) {
frameTypeOffset = i + 1;
if (frameTypeOffset >= TS_SIZE) { // the byte to check is in the next TS packet
frameTypeOffset -= TS_SIZE;
if (!synced)
dbgframes("%d>", frameTypeOffset);
break;
}
}
scanner = EMPTY_SCANNER; scanner = EMPTY_SCANNER;
if (synced && !SeenPayloadStart && Processed)
return Processed; // flush everything before this new frame
newFrame = true; newFrame = true;
uchar FrameType = Data[frameTypeOffset]; uchar FrameType = Data[i + 1];
frameTypeOffset = -1;
independentFrame = FrameType == 0x10; independentFrame = FrameType == 0x10;
if (synced) { if (synced) {
if (framesPerPayloadUnit < 0) { if (framesPerPayloadUnit < 0) {
payloadUnitOfFrame = (payloadUnitOfFrame + 1) % -framesPerPayloadUnit; payloadUnitOfFrame = (payloadUnitOfFrame + 1) % -framesPerPayloadUnit;
if (payloadUnitOfFrame != 0 && independentFrame) if (payloadUnitOfFrame != 0 && independentFrame)
payloadUnitOfFrame = 0; payloadUnitOfFrame = 0;
if (payloadUnitOfFrame) { if (payloadUnitOfFrame)
newPayload = false;
newFrame = false; newFrame = false;
} }
}
if (framesPerPayloadUnit <= 1) if (framesPerPayloadUnit <= 1)
scanning = false; scanning = false;
} }

11
remux.h
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and * See the main source file 'vdr.c' for copyright information and
* how to reach the author. * how to reach the author.
* *
* $Id: remux.h 2.30 2011/06/12 12:49:17 kls Exp $ * $Id: remux.h 2.31 2011/09/04 09:09:33 kls Exp $
*/ */
#ifndef __REMUX_H #ifndef __REMUX_H
@ -336,16 +336,16 @@ void PesDump(const char *Name, const u_char *Data, int Length);
// Frame detector: // Frame detector:
#define MIN_TS_PACKETS_FOR_FRAME_DETECTOR 2
class cFrameDetector { class cFrameDetector {
private: private:
enum { MaxPtsValues = 150 }; enum { MaxPtsValues = 150 };
int pid; int pid;
int type; int type;
bool synced; bool synced;
bool newPayload;
bool newFrame; bool newFrame;
bool independentFrame; bool independentFrame;
int frameTypeOffset;
uint32_t ptsValues[MaxPtsValues]; // 32 bit is enough - we only need the delta uint32_t ptsValues[MaxPtsValues]; // 32 bit is enough - we only need the delta
int numPtsValues; int numPtsValues;
int numFrames; int numFrames;
@ -377,11 +377,6 @@ public:
///< Analyze() needs to be called again with more actual data. ///< Analyze() needs to be called again with more actual data.
bool Synced(void) { return synced; } bool Synced(void) { return synced; }
///< Returns true if the frame detector has synced on the data stream. ///< Returns true if the frame detector has synced on the data stream.
bool NewPayload(void) { return newPayload; }
///< Returns true if the data given to the last call to Analyze() started a
///< new payload. The caller should remember the current file offset in
///< order to be able to generate an index entry later, when NewFrame()
///< returns true.
bool NewFrame(void) { return newFrame; } bool NewFrame(void) { return newFrame; }
///< Returns true if the data given to the last call to Analyze() started a ///< Returns true if the data given to the last call to Analyze() started a
///< new frame. ///< new frame.