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/*
* cutter.c: The video cutting facilities
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: cutter.c 3.4 2013/10/02 13:18:02 kls Exp $
*/
#include "cutter.h"
#include "menu.h"
#include "recording.h"
#include "remux.h"
#include "videodir.h"
// --- cPacketBuffer ---------------------------------------------------------
class cPacketBuffer {
private:
uchar *data;
int size;
int length;
public:
cPacketBuffer(void);
~cPacketBuffer();
void Append(uchar *Data, int Length);
///< Appends Length bytes of Data to this packet buffer.
void Flush(uchar *Data, int &Length, int MaxLength);
///< Flushes the content of this packet buffer into the given Data, starting
///< at position Length, and clears the buffer afterwards. Length will be
///< incremented accordingly. If Length plus the total length of the stored
///< packets would exceed MaxLength, nothing is copied.
};
cPacketBuffer::cPacketBuffer(void)
{
data = NULL;
size = length = 0;
}
cPacketBuffer::~cPacketBuffer()
{
free(data);
}
void cPacketBuffer::Append(uchar *Data, int Length)
{
if (length + Length >= size) {
int NewSize = (length + Length) * 3 / 2;
if (uchar *p = (uchar *)realloc(data, NewSize)) {
data = p;
size = NewSize;
}
else
return; // out of memory
}
memcpy(data + length, Data, Length);
length += Length;
}
void cPacketBuffer::Flush(uchar *Data, int &Length, int MaxLength)
{
if (Data && length > 0 && Length + length <= MaxLength) {
memcpy(Data + Length, data, length);
Length += length;
}
length = 0;
}
// --- cPacketStorage --------------------------------------------------------
class cPacketStorage {
private:
cPacketBuffer *buffers[MAXPID];
public:
cPacketStorage(void);
~cPacketStorage();
void Append(int Pid, uchar *Data, int Length);
void Flush(int Pid, uchar *Data, int &Length, int MaxLength);
};
cPacketStorage::cPacketStorage(void)
{
for (int i = 0; i < MAXPID; i++)
buffers[i] = NULL;
}
cPacketStorage::~cPacketStorage()
{
for (int i = 0; i < MAXPID; i++)
delete buffers[i];
}
void cPacketStorage::Append(int Pid, uchar *Data, int Length)
{
if (!buffers[Pid])
buffers[Pid] = new cPacketBuffer;
buffers[Pid]->Append(Data, Length);
}
void cPacketStorage::Flush(int Pid, uchar *Data, int &Length, int MaxLength)
{
if (buffers[Pid])
buffers[Pid]->Flush(Data, Length, MaxLength);
}
// --- cMpeg2Fixer -----------------------------------------------------------
class cMpeg2Fixer : private cTsPayload {
private:
bool FindHeader(uint32_t Code, const char *Header);
public:
cMpeg2Fixer(uchar *Data, int Length, int Vpid);
void SetBrokenLink(void);
void SetClosedGop(void);
int GetTref(void);
void AdjGopTime(int Offset, int FramesPerSecond);
void AdjTref(int TrefOffset);
};
cMpeg2Fixer::cMpeg2Fixer(uchar *Data, int Length, int Vpid)
{
// Go to first video packet:
for (; Length > 0; Data += TS_SIZE, Length -= TS_SIZE) {
if (TsPid(Data) == Vpid) {
Setup(Data, Length, Vpid);
break;
}
}
}
bool cMpeg2Fixer::FindHeader(uint32_t Code, const char *Header)
{
Reset();
if (Find(Code))
return true;
esyslog("ERROR: %s header not found!", Header);
return false;
}
void cMpeg2Fixer::SetBrokenLink(void)
{
if (!FindHeader(0x000001B8, "GOP"))
return;
SkipBytes(3);
uchar b = GetByte();
if (!(b & 0x40)) { // GOP not closed
b |= 0x20;
SetByte(b, GetLastIndex());
}
}
void cMpeg2Fixer::SetClosedGop(void)
{
if (!FindHeader(0x000001B8, "GOP"))
return;
SkipBytes(3);
uchar b = GetByte();
b |= 0x40;
SetByte(b, GetLastIndex());
}
int cMpeg2Fixer::GetTref(void)
{
if (!FindHeader(0x00000100, "picture"))
return 0;
int Tref = GetByte() << 2;
Tref |= GetByte() >> 6;
return Tref;
}
void cMpeg2Fixer::AdjGopTime(int Offset, int FramesPerSecond)
{
if (!FindHeader(0x000001B8, "GOP"))
return;
uchar Byte1 = GetByte();
int Index1 = GetLastIndex();
uchar Byte2 = GetByte();
int Index2 = GetLastIndex();
uchar Byte3 = GetByte();
int Index3 = GetLastIndex();
uchar Byte4 = GetByte();
int Index4 = GetLastIndex();
uchar Frame = ((Byte3 & 0x1F) << 1) | (Byte4 >> 7);
uchar Sec = ((Byte2 & 0x07) << 3) | (Byte3 >> 5);
uchar Min = ((Byte1 & 0x03) << 4) | (Byte2 >> 4);
uchar Hour = ((Byte1 & 0x7C) >> 2);
int GopTime = ((Hour * 60 + Min) * 60 + Sec) * FramesPerSecond + Frame;
if (GopTime) { // do not fix when zero
GopTime += Offset;
if (GopTime < 0)
GopTime += 24 * 60 * 60 * FramesPerSecond;
Frame = GopTime % FramesPerSecond;
GopTime = GopTime / FramesPerSecond;
Sec = GopTime % 60;
GopTime = GopTime / 60;
Min = GopTime % 60;
GopTime = GopTime / 60;
Hour = GopTime % 24;
SetByte((Byte1 & 0x80) | (Hour << 2) | (Min >> 4), Index1);
SetByte(((Min & 0x0F) << 4) | 0x08 | (Sec >> 3), Index2);
SetByte(((Sec & 0x07) << 3) | (Frame >> 1), Index3);
SetByte((Byte4 & 0x7F) | ((Frame & 0x01) << 7), Index4);
}
}
void cMpeg2Fixer::AdjTref(int TrefOffset)
{
if (!FindHeader(0x00000100, "picture"))
return;
int Tref = GetByte() << 2;
int Index1 = GetLastIndex();
uchar Byte2 = GetByte();
int Index2 = GetLastIndex();
Tref |= Byte2 >> 6;
Tref -= TrefOffset;
SetByte(Tref >> 2, Index1);
SetByte((Tref << 6) | (Byte2 & 0x3F), Index2);
}
// --- cCuttingThread --------------------------------------------------------
class cCuttingThread : public cThread {
private:
const char *error;
bool isPesRecording;
double framesPerSecond;
cUnbufferedFile *fromFile, *toFile;
cFileName *fromFileName, *toFileName;
cIndexFile *fromIndex, *toIndex;
cMarks fromMarks, toMarks;
int numSequences;
off_t maxVideoFileSize;
off_t fileSize;
bool suspensionLogged;
int sequence; // cutting sequence
int delta; // time between two frames (PTS ticks)
int64_t lastVidPts; // the video PTS of the last frame (in display order)
bool multiFramePkt; // multiple frames within one PES packet
int64_t firstPts; // first valid PTS, for dangling packet stripping
int64_t offset; // offset to add to all timestamps
int tRefOffset; // number of stripped frames in GOP
uchar counter[MAXPID]; // the TS continuity counter for each PID
bool keepPkt[MAXPID]; // flag for each PID to keep packets, for dangling packet stripping
int numIFrames; // number of I-frames without pending packets
cPatPmtParser patPmtParser;
bool Throttled(void);
bool SwitchFile(bool Force = false);
bool LoadFrame(int Index, uchar *Buffer, bool &Independent, int &Length);
bool FramesAreEqual(int Index1, int Index2);
void GetPendingPackets(uchar *Buffer, int &Length, int Index);
// Gather all non-video TS packets from Index upward that either belong to
// payloads that started before Index, or have a PTS that is before lastVidPts,
// and add them to the end of the given Data.
bool FixFrame(uchar *Data, int &Length, bool Independent, int Index, bool CutIn, bool CutOut);
bool ProcessSequence(int LastEndIndex, int BeginIndex, int EndIndex, int NextBeginIndex);
protected:
virtual void Action(void);
public:
cCuttingThread(const char *FromFileName, const char *ToFileName);
virtual ~cCuttingThread();
const char *Error(void) { return error; }
};
cCuttingThread::cCuttingThread(const char *FromFileName, const char *ToFileName)
:cThread("video cutting", true)
{
error = NULL;
fromFile = toFile = NULL;
fromFileName = toFileName = NULL;
fromIndex = toIndex = NULL;
cRecording Recording(FromFileName);
isPesRecording = Recording.IsPesRecording();
framesPerSecond = Recording.FramesPerSecond();
suspensionLogged = false;
fileSize = 0;
sequence = 0;
delta = int(round(PTSTICKS / framesPerSecond));
lastVidPts = -1;
multiFramePkt = false;
firstPts = -1;
offset = 0;
tRefOffset = 0;
memset(counter, 0x00, sizeof(counter));
numIFrames = 0;
if (fromMarks.Load(FromFileName, framesPerSecond, isPesRecording) && fromMarks.Count()) {
numSequences = fromMarks.GetNumSequences();
if (numSequences > 0) {
fromFileName = new cFileName(FromFileName, false, true, isPesRecording);
toFileName = new cFileName(ToFileName, true, true, isPesRecording);
fromIndex = new cIndexFile(FromFileName, false, isPesRecording);
toIndex = new cIndexFile(ToFileName, true, isPesRecording);
toMarks.Load(ToFileName, framesPerSecond, isPesRecording); // doesn't actually load marks, just sets the file name
maxVideoFileSize = MEGABYTE(Setup.MaxVideoFileSize);
if (isPesRecording && maxVideoFileSize > MEGABYTE(MAXVIDEOFILESIZEPES))
maxVideoFileSize = MEGABYTE(MAXVIDEOFILESIZEPES);
Start();
}
else
esyslog("no editing sequences found for %s", FromFileName);
}
else
esyslog("no editing marks found for %s", FromFileName);
}
cCuttingThread::~cCuttingThread()
{
Cancel(3);
delete fromFileName;
delete toFileName;
delete fromIndex;
delete toIndex;
}
bool cCuttingThread::Throttled(void)
{
if (cIoThrottle::Engaged()) {
if (!suspensionLogged) {
dsyslog("suspending cutter thread");
suspensionLogged = true;
}
return true;
}
else if (suspensionLogged) {
dsyslog("resuming cutter thread");
suspensionLogged = false;
}
return false;
}
bool cCuttingThread::LoadFrame(int Index, uchar *Buffer, bool &Independent, int &Length)
{
uint16_t FileNumber;
off_t FileOffset;
if (fromIndex->Get(Index, &FileNumber, &FileOffset, &Independent, &Length)) {
fromFile = fromFileName->SetOffset(FileNumber, FileOffset);
if (fromFile) {
fromFile->SetReadAhead(MEGABYTE(20));
int len = ReadFrame(fromFile, Buffer, Length, MAXFRAMESIZE);
if (len < 0)
error = "ReadFrame";
else if (len != Length)
Length = len;
return error == NULL;
}
else
error = "fromFile";
}
return false;
}
bool cCuttingThread::SwitchFile(bool Force)
{
if (fileSize > maxVideoFileSize || Force) {
toFile = toFileName->NextFile();
if (!toFile) {
error = "toFile";
return false;
}
fileSize = 0;
}
return true;
}
class cHeapBuffer {
private:
uchar *buffer;
public:
cHeapBuffer(int Size) { buffer = MALLOC(uchar, Size); }
~cHeapBuffer() { free(buffer); }
operator uchar * () { return buffer; }
};
bool cCuttingThread::FramesAreEqual(int Index1, int Index2)
{
cHeapBuffer Buffer1(MAXFRAMESIZE);
cHeapBuffer Buffer2(MAXFRAMESIZE);
if (!Buffer1 || !Buffer2)
return false;
bool Independent;
int Length1;
int Length2;
if (LoadFrame(Index1, Buffer1, Independent, Length1) && LoadFrame(Index2, Buffer2, Independent, Length2)) {
if (Length1 == Length2) {
int Diffs = 0;
for (int i = 0; i < Length1; i++) {
if (Buffer1[i] != Buffer2[i]) {
if (Diffs++ > 10) // the continuity counters of the PAT/PMT packets may differ
return false;
}
}
return true;
}
}
return false;
}
void cCuttingThread::GetPendingPackets(uchar *Data, int &Length, int Index)
{
cHeapBuffer Buffer(MAXFRAMESIZE);
if (!Buffer)
return;
bool Processed[MAXPID] = { false };
cPacketStorage PacketStorage;
int64_t LastPts = lastVidPts + delta;// adding one frame length to fully cover the very last frame
Processed[patPmtParser.Vpid()] = true; // we only want non-video packets
for (int NumIndependentFrames = 0; NumIndependentFrames < 2; Index++) {
bool Independent;
int len;
if (LoadFrame(Index, Buffer, Independent, len)) {
if (Independent)
NumIndependentFrames++;
for (uchar *p = Buffer; len >= TS_SIZE && *p == TS_SYNC_BYTE; len -= TS_SIZE, p += TS_SIZE) {
int Pid = TsPid(p);
if (Pid != PATPID && !patPmtParser.IsPmtPid(Pid) && !Processed[Pid]) {
int64_t Pts = TsGetPts(p, TS_SIZE);
if (Pts >= 0) {
int64_t d = PtsDiff(LastPts, Pts);
if (d < 0) // Pts is before LastPts
PacketStorage.Flush(Pid, Data, Length, MAXFRAMESIZE);
else { // Pts is at or after LastPts
NumIndependentFrames = 0; // we search until we find two consecutive I-frames without any more pending packets
Processed[Pid] = true;
}
}
if (!Processed[Pid])
PacketStorage.Append(Pid, p, TS_SIZE);
}
}
}
else
break;
}
}
bool cCuttingThread::FixFrame(uchar *Data, int &Length, bool Independent, int Index, bool CutIn, bool CutOut)
{
if (!patPmtParser.Vpid()) {
if (!patPmtParser.ParsePatPmt(Data, Length))
return false;
}
if (CutIn) {
sequence++;
memset(keepPkt, false, sizeof(keepPkt));
numIFrames = 0;
firstPts = TsGetPts(Data, Length);
// Determine the PTS offset at the beginning of each sequence (except the first one):
if (sequence != 1) {
if (firstPts >= 0)
offset = (lastVidPts + delta - firstPts) & MAX33BIT;
}
}
if (CutOut)
GetPendingPackets(Data, Length, Index + 1);
if (Independent) {
numIFrames++;
tRefOffset = 0;
}
// Fix MPEG-2:
if (patPmtParser.Vtype() == 2) {
cMpeg2Fixer Mpeg2fixer(Data, Length, patPmtParser.Vpid());
if (CutIn) {
if (sequence == 1 || multiFramePkt)
Mpeg2fixer.SetBrokenLink();
else {
Mpeg2fixer.SetClosedGop();
tRefOffset = Mpeg2fixer.GetTref();
}
}
if (tRefOffset)
Mpeg2fixer.AdjTref(tRefOffset);
if (sequence > 1 && Independent)
Mpeg2fixer.AdjGopTime((offset - MAX33BIT) / delta, round(framesPerSecond));
}
bool DeletedFrame = false;
bool GotVidPts = false;
bool StripVideo = sequence > 1 && tRefOffset;
uchar *p;
int len;
for (p = Data, len = Length; len >= TS_SIZE && *p == TS_SYNC_BYTE; p += TS_SIZE, len -= TS_SIZE) {
int Pid = TsPid(p);
// Strip dangling packets:
if (numIFrames < 2 && Pid != PATPID && !patPmtParser.IsPmtPid(Pid)) {
if (Pid != patPmtParser.Vpid() || StripVideo) {
int64_t Pts = TsGetPts(p, TS_SIZE);
if (Pts >= 0)
keepPkt[Pid] = PtsDiff(firstPts, Pts) >= 0; // Pts is at or after FirstPts
if (!keepPkt[Pid]) {
TsHidePayload(p);
numIFrames = 0; // we search until we find two consecutive I-frames without any more dangling packets
if (Pid == patPmtParser.Vpid())
DeletedFrame = true;
}
}
}
// Adjust the TS continuity counter:
if (sequence > 1) {
if (TsHasPayload(p))
counter[Pid] = (counter[Pid] + 1) & TS_CONT_CNT_MASK;
TsSetContinuityCounter(p, counter[Pid]);
}
else
counter[Pid] = TsGetContinuityCounter(p); // collect initial counters
// Adjust PTS:
int64_t Pts = TsGetPts(p, TS_SIZE);
if (Pts >= 0) {
if (sequence > 1) {
Pts = PtsAdd(Pts, offset);
TsSetPts(p, TS_SIZE, Pts);
}
// Keep track of the highest video PTS - in case of multiple fields per frame, take the first one
if (!GotVidPts && Pid == patPmtParser.Vpid()) {
GotVidPts = true;
if (lastVidPts < 0 || PtsDiff(lastVidPts, Pts) > 0)
lastVidPts = Pts;
}
}
// Adjust DTS:
if (sequence > 1) {
int64_t Dts = TsGetDts(p, TS_SIZE);
if (Dts >= 0) {
Dts = PtsAdd(Dts, offset);
if (CutIn)
Dts = PtsAdd(Dts, tRefOffset * delta);
TsSetDts(p, TS_SIZE, Dts);
}
int64_t Pcr = TsGetPcr(p);
if (Pcr >= 0) {
Pcr = Pcr + offset * PCRFACTOR;
if (Pcr > MAX27MHZ)
Pcr -= MAX27MHZ + 1;
TsSetPcr(p, Pcr);
}
}
}
if (!DeletedFrame && !GotVidPts) {
// Adjust PTS for multiple frames within a single PES packet:
lastVidPts = (lastVidPts + delta) & MAX33BIT;
multiFramePkt = true;
}
return DeletedFrame;
}
bool cCuttingThread::ProcessSequence(int LastEndIndex, int BeginIndex, int EndIndex, int NextBeginIndex)
{
// Check for seamless connections:
bool SeamlessBegin = LastEndIndex >= 0 && FramesAreEqual(LastEndIndex, BeginIndex);
bool SeamlessEnd = NextBeginIndex >= 0 && FramesAreEqual(EndIndex, NextBeginIndex);
// Process all frames from BeginIndex (included) to EndIndex (excluded):
cHeapBuffer Buffer(MAXFRAMESIZE);
if (!Buffer) {
error = "malloc";
return false;
}
for (int Index = BeginIndex; Running() && Index < EndIndex; Index++) {
bool Independent;
int Length;
if (LoadFrame(Index, Buffer, Independent, Length)) {
// Make sure there is enough disk space:
AssertFreeDiskSpace(-1);
bool CutIn = !SeamlessBegin && Index == BeginIndex;
bool CutOut = !SeamlessEnd && Index == EndIndex - 1;
bool DeletedFrame = false;
if (!isPesRecording) {
DeletedFrame = FixFrame(Buffer, Length, Independent, Index, CutIn, CutOut);
}
else if (CutIn)
cRemux::SetBrokenLink(Buffer, Length);
// Every file shall start with an independent frame:
if (Independent) {
if (!SwitchFile())
return false;
}
// Write index:
if (!DeletedFrame && !toIndex->Write(Independent, toFileName->Number(), fileSize)) {
error = "toIndex";
return false;
}
// Write data:
if (toFile->Write(Buffer, Length) < 0) {
error = "safe_write";
return false;
}
fileSize += Length;
// Generate marks at the editing points in the edited recording:
if (numSequences > 1 && Index == BeginIndex) {
if (toMarks.Count() > 0)
toMarks.Add(toIndex->Last());
toMarks.Add(toIndex->Last());
toMarks.Save();
}
}
else
return false;
}
return true;
}
void cCuttingThread::Action(void)
{
if (cMark *BeginMark = fromMarks.GetNextBegin()) {
fromFile = fromFileName->Open();
toFile = toFileName->Open();
if (!fromFile || !toFile)
return;
int LastEndIndex = -1;
while (BeginMark && Running()) {
// Suspend cutting if we have severe throughput problems:
if (Throttled()) {
cCondWait::SleepMs(100);
continue;
}
// Determine the actual begin and end marks, skipping any marks at the same position:
cMark *EndMark = fromMarks.GetNextEnd(BeginMark);
// Process the current sequence:
int EndIndex = EndMark ? EndMark->Position() : fromIndex->Last() + 1;
int NextBeginIndex = -1;
if (EndMark) {
if (cMark *NextBeginMark = fromMarks.GetNextBegin(EndMark))
NextBeginIndex = NextBeginMark->Position();
}
if (!ProcessSequence(LastEndIndex, BeginMark->Position(), EndIndex, NextBeginIndex))
break;
if (!EndMark)
break; // reached EOF
LastEndIndex = EndIndex;
// Switch to the next sequence:
BeginMark = fromMarks.GetNextBegin(EndMark);
if (BeginMark) {
// Split edited files:
if (Setup.SplitEditedFiles) {
if (!SwitchFile(true))
break;
}
}
}
Recordings.TouchUpdate();
}
else
esyslog("no editing marks found!");
}
// --- cCutter ---------------------------------------------------------------
cCutter::cCutter(const char *FileName)
{
cuttingThread = NULL;
error = false;
originalVersionName = FileName;
}
cCutter::~cCutter()
{
Stop();
}
cString cCutter::EditedFileName(const char *FileName)
{
cRecording Recording(FileName);
cMarks Marks;
if (Marks.Load(FileName, Recording.FramesPerSecond(), Recording.IsPesRecording())) {
if (cMark *First = Marks.GetNextBegin())
Recording.SetStartTime(Recording.Start() + (int(First->Position() / Recording.FramesPerSecond() + 30) / 60) * 60);
return Recording.PrefixFileName('%');
}
return NULL;
}
bool cCutter::Start(void)
{
if (!cuttingThread) {
error = false;
if (*originalVersionName) {
cRecording Recording(originalVersionName);
editedVersionName = EditedFileName(originalVersionName);
if (*editedVersionName) {
if (strcmp(originalVersionName, editedVersionName) != 0) { // names must be different!
if (cVideoDirectory::RemoveVideoFile(editedVersionName) && MakeDirs(editedVersionName, true)) {
Recording.WriteInfo(editedVersionName);
Recordings.AddByName(editedVersionName, false);
cuttingThread = new cCuttingThread(originalVersionName, editedVersionName);
return true;
}
}
}
}
}
return false;
}
void cCutter::Stop(void)
{
bool Interrupted = cuttingThread && cuttingThread->Active();
const char *Error = cuttingThread ? cuttingThread->Error() : NULL;
delete cuttingThread;
cuttingThread = NULL;
if ((Interrupted || Error) && *editedVersionName) {
if (Interrupted)
isyslog("editing process has been interrupted");
if (Error)
esyslog("ERROR: '%s' during editing process", Error);
if (cReplayControl::NowReplaying() && strcmp(cReplayControl::NowReplaying(), editedVersionName) == 0)
cControl::Shutdown();
cVideoDirectory::RemoveVideoFile(editedVersionName);
Recordings.DelByName(editedVersionName);
}
}
bool cCutter::Active(void)
{
if (cuttingThread) {
if (cuttingThread->Active())
return true;
error = cuttingThread->Error();
Stop();
if (!error)
cRecordingUserCommand::InvokeCommand(RUC_EDITEDRECORDING, editedVersionName, originalVersionName);
}
return false;
}
bool cCutter::Error(void)
{
return error;
}
#define CUTTINGCHECKINTERVAL 500 // ms between checks for the active cutting process
bool CutRecording(const char *FileName)
{
if (DirectoryOk(FileName)) {
cRecording Recording(FileName);
if (Recording.Name()) {
cMarks Marks;
if (Marks.Load(FileName, Recording.FramesPerSecond(), Recording.IsPesRecording()) && Marks.Count()) {
if (Marks.GetNumSequences()) {
cCutter Cutter(FileName);
if (Cutter.Start()) {
while (Cutter.Active())
cCondWait::SleepMs(CUTTINGCHECKINTERVAL);
if (!Cutter.Error())
return true;
fprintf(stderr, "error while cutting\n");
}
else
fprintf(stderr, "can't start editing process\n");
}
else
fprintf(stderr, "'%s' has no editing sequences\n", FileName);
}
else
fprintf(stderr, "'%s' has no editing marks\n", FileName);
}
else
fprintf(stderr, "'%s' is not a recording\n", FileName);
}
else
fprintf(stderr, "'%s' is not a directory\n", FileName);
return false;
}