From 9e5babf9db52e64bdae60137be7696e56241fca6 Mon Sep 17 00:00:00 2001
From: xingzilong <xingzilong@454eff88-639b-444f-9e54-f578c98de674>
Date: 星期五, 18 八月 2017 18:12:17 +0800
Subject: [PATCH] H264 NALU解析 并在RTSPServer判断
---
VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/MPEG2TransportStreamIndexFile.hh | 96 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 96 insertions(+), 0 deletions(-)
diff --git a/VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/MPEG2TransportStreamIndexFile.hh b/VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/MPEG2TransportStreamIndexFile.hh
new file mode 100644
index 0000000..f6117e5
--- /dev/null
+++ b/VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/MPEG2TransportStreamIndexFile.hh
@@ -0,0 +1,96 @@
+/**********
+This library is free software; you can redistribute it and/or modify it under
+the terms of the GNU Lesser General Public License as published by the
+Free Software Foundation; either version 3 of the License, or (at your
+option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
+
+This library is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this library; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+**********/
+// "liveMedia"
+// Copyright (c) 1996-2017 Live Networks, Inc. All rights reserved.
+// A class that encapsulates MPEG-2 Transport Stream 'index files'/
+// These index files are used to implement 'trick play' operations
+// (seek-by-time, fast forward, reverse play) on Transport Stream files.
+//
+// C++ header
+
+#ifndef _MPEG2_TRANSPORT_STREAM_INDEX_FILE_HH
+#define _MPEG2_TRANSPORT_STREAM_INDEX_FILE_HH
+
+#ifndef _MEDIA_HH
+#include "Media.hh"
+#endif
+
+#define INDEX_RECORD_SIZE 11
+
+class MPEG2TransportStreamIndexFile: public Medium {
+public:
+ static MPEG2TransportStreamIndexFile* createNew(UsageEnvironment& env,
+ char const* indexFileName);
+
+ virtual ~MPEG2TransportStreamIndexFile();
+
+ // Functions that map between a playing time and a Transport packet number
+ // in the original Transport Stream file:
+
+ void lookupTSPacketNumFromNPT(float& npt, unsigned long& tsPacketNumber,
+ unsigned long& indexRecordNumber);
+ // Looks up the Transport Stream Packet number corresponding to "npt".
+ // (This may modify "npt" to a more exact value.)
+ // (We also return the index record number that we looked up.)
+
+ void lookupPCRFromTSPacketNum(unsigned long& tsPacketNumber, Boolean reverseToPreviousCleanPoint,
+ float& pcr, unsigned long& indexRecordNumber);
+ // Looks up the PCR timestamp for the transport packet "tsPacketNumber".
+ // (Adjust "tsPacketNumber" only if "reverseToPreviousCleanPoint" is True.)
+ // (We also return the index record number that we looked up.)
+
+ // Miscellaneous functions used to implement 'trick play':
+ Boolean readIndexRecordValues(unsigned long indexRecordNum,
+ unsigned long& transportPacketNum, u_int8_t& offset,
+ u_int8_t& size, float& pcr, u_int8_t& recordType);
+ float getPlayingDuration();
+ void stopReading() { closeFid(); }
+
+ int mpegVersion();
+ // returns the best guess for the version of MPEG being used for data within the underlying Transport Stream file.
+ // (1,2,4, or 5 (representing H.264). 0 means 'don't know' (usually because the index file is empty))
+
+private:
+ MPEG2TransportStreamIndexFile(UsageEnvironment& env, char const* indexFileName);
+
+ Boolean openFid();
+ Boolean seekToIndexRecord(unsigned long indexRecordNumber);
+ Boolean readIndexRecord(unsigned long indexRecordNum); // into "fBuf"
+ Boolean readOneIndexRecord(unsigned long indexRecordNum); // closes "fFid" at end
+ void closeFid();
+
+ u_int8_t recordTypeFromBuf() { return fBuf[0]; }
+ u_int8_t offsetFromBuf() { return fBuf[1]; }
+ u_int8_t sizeFromBuf() { return fBuf[2]; }
+ float pcrFromBuf(); // after "fBuf" has been read
+ unsigned long tsPacketNumFromBuf();
+ void setMPEGVersionFromRecordType(u_int8_t recordType);
+
+ Boolean rewindToCleanPoint(unsigned long&ixFound);
+ // used to implement "lookupTSPacketNumber()"
+
+private:
+ char* fFileName;
+ FILE* fFid; // used internally when reading from the file
+ int fMPEGVersion;
+ unsigned long fCurrentIndexRecordNum; // within "fFid"
+ float fCachedPCR;
+ unsigned long fCachedTSPacketNumber, fCachedIndexRecordNumber;
+ unsigned long fNumIndexRecords;
+ unsigned char fBuf[INDEX_RECORD_SIZE]; // used for reading index records from file
+};
+
+#endif
--
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