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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commite2de64d6f1beb9e492daf5b886e19933c1fa41dd (patch)
tree9047cf9e6b5c43878d5bf82660adae77ceee097a /mpeglib/lib/mpegplay/mpegVideoStream.cpp
downloadtdemultimedia-e2de64d6f1beb9e492daf5b886e19933c1fa41dd.tar.gz
tdemultimedia-e2de64d6f1beb9e492daf5b886e19933c1fa41dd.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'mpeglib/lib/mpegplay/mpegVideoStream.cpp')
-rw-r--r--mpeglib/lib/mpegplay/mpegVideoStream.cpp224
1 files changed, 224 insertions, 0 deletions
diff --git a/mpeglib/lib/mpegplay/mpegVideoStream.cpp b/mpeglib/lib/mpegplay/mpegVideoStream.cpp
new file mode 100644
index 00000000..5e16b116
--- /dev/null
+++ b/mpeglib/lib/mpegplay/mpegVideoStream.cpp
@@ -0,0 +1,224 @@
+/*
+ a mpegVideoStream buffer
+ Copyright (C) 1999 Martin Vogt
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Library General Public License as published by
+ the Free Software Foundation.
+
+ For more information look at the file COPYRIGHT in this package
+
+ */
+
+
+#include "mpegVideoStream.h"
+
+#include <iostream>
+
+using namespace std;
+
+MpegVideoStream::MpegVideoStream(InputStream* input) {
+
+
+ this->input=input;
+ lHasStream=false;
+
+ mpegSystemStream=new MpegSystemStream(input);
+ mpegSystemHeader=new MpegSystemHeader();
+ mpegVideoBitWindow= new MpegVideoBitWindow();
+
+
+}
+
+
+MpegVideoStream::~MpegVideoStream() {
+ delete mpegSystemStream;
+ delete mpegSystemHeader;
+ delete mpegVideoBitWindow;
+}
+
+
+
+
+int MpegVideoStream::firstInitialize(MpegVideoHeader* mpegHeader) {
+ if (lHasStream == false) {
+ if (mpegSystemStream->firstInitialize(mpegSystemHeader)==false) {
+ return false;
+ }
+ fill_videoBuffer(mpegSystemHeader);
+ lHasStream=true;
+ }
+ // now find SEQ_START_CODE
+ hasBytes(4);
+ mpegVideoBitWindow->flushByteOffset();
+
+ if (mpegSystemHeader->getLayer() == _PACKET_SYSLAYER) {
+ unsigned int startCode=showBits(32);
+ if (startCode != _SEQ_START_CODE) {
+ flushBits(8);
+ return false;
+ }
+ flushBits(32);
+ }
+ if (mpegHeader->parseSeq(this)==false) {
+ return false;
+ }
+ return true;
+}
+
+
+int MpegVideoStream::isStartCode(unsigned int data) {
+
+ switch(data) {
+ case SEQ_END_CODE:
+ case SEQ_START_CODE:
+ case GOP_START_CODE:
+ case PICTURE_START_CODE:
+ case SLICE_MIN_START_CODE:
+ case SLICE_MAX_START_CODE:
+ case EXT_START_CODE:
+ case USER_START_CODE:
+ case SEQUENCE_ERROR_CODE:
+ case SYSTEM_HEADER_START_CODE:
+ case ISO_11172_END_CODE:
+ case EOF:
+ return true;
+ }
+ if ((SLICE_MIN_START_CODE < data) && (data < SLICE_MAX_START_CODE)) {
+ return true;
+ }
+ return false;
+}
+
+int MpegVideoStream::next_start_code() {
+ flushByteOffset();
+
+ unsigned int data;
+ data=showBits(32);
+
+
+ while(eof()==false) {
+ data=showBits(32);
+ if (isStartCode(data)) {
+ return true;
+ }
+ flushBits(8);
+ }
+ return true;
+}
+
+
+int MpegVideoStream::nextGOP() {
+
+ mpegVideoBitWindow->flushByteOffset();
+ unsigned int data=showBits(32);
+ if (data != GOP_START_CODE) {
+ flushBits(8);
+ return false;
+ }
+ return true;
+}
+
+
+int MpegVideoStream::nextPIC() {
+ mpegVideoBitWindow->flushByteOffset();
+ unsigned int data=showBits(32);
+ if ( (data != PICTURE_START_CODE) &&
+ (data != GOP_START_CODE) &&
+ (data != SEQ_START_CODE) ) {
+ flushBits(8);
+ return false;
+ }
+ return true;
+}
+
+
+
+
+
+int MpegVideoStream::hasBytes(int byteCnt) {
+ if (mpegVideoBitWindow->getLength() < byteCnt) {
+ get_more_video_data();
+ if (mpegVideoBitWindow->getLength() < byteCnt) {
+ return hasBytes(byteCnt);
+ }
+ }
+ return true;
+}
+
+
+
+
+int MpegVideoStream::eof() {
+ if (input->eof()) {
+ return true;
+ }
+ return false;
+}
+
+
+int MpegVideoStream::getByteDirect() {
+ unsigned char byte;
+ if (input->read((char*)&byte,1) != 1) {
+ return -1;
+ }
+ return (int)byte;
+}
+
+
+int MpegVideoStream::get_more_video_data() {
+
+
+ while(1) {
+ if (mpegSystemStream->nextPacket(mpegSystemHeader)==false) {
+ continue;
+ }
+ if (mpegSystemStream->eof() == true) {
+ printf ("\n");
+ mpegVideoBitWindow->fillWithIsoEndCode(1024);
+ cout <<"Unexpected read error."<<endl;
+ return false;
+ }
+ if (mpegSystemHeader->getPacketID() == _PAKET_ID_VIDEO) {
+ break;
+ }
+
+ }
+
+
+ fill_videoBuffer(mpegSystemHeader);
+ return true;
+}
+
+
+void MpegVideoStream::fill_videoBuffer(MpegSystemHeader* mpegSystemHeader) {
+ int bytes;
+
+ bytes=mpegSystemHeader->getPacketLen();
+ unsigned char* packetBuffer= new unsigned char[bytes];
+ int didRead;
+ didRead=input->read((char*)packetBuffer,bytes);
+ if (bytes==0) {
+ mpegVideoBitWindow->fillWithIsoEndCode(1024);
+ return ;
+ }
+
+ mpegVideoBitWindow->appendToBuffer(packetBuffer,didRead);
+ if (input->eof()) {
+ mpegVideoBitWindow->fillWithIsoEndCode(bytes-didRead);
+ }
+
+ delete packetBuffer;
+}
+
+
+TimeStamp* MpegVideoStream::getCurrentTimeStamp() {
+ long pos=input->getBytePosition();
+ int transfered=4*mpegVideoBitWindow->getLength();
+ pos=pos-transfered;
+
+ TimeStamp* timeStamp=input->getTimeStamp(pos);
+
+ return timeStamp;
+}
+