From 15d0c49e85159b9e27870aff5280c0cd95b103c4 Mon Sep 17 00:00:00 2001
From: xuxiuxi <xuxiuxi@454eff88-639b-444f-9e54-f578c98de674>
Date: 星期四, 04 五月 2017 17:16:56 +0800
Subject: [PATCH]
---
VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/T140TextRTPSink.hh | 103 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 103 insertions(+), 0 deletions(-)
diff --git a/VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/T140TextRTPSink.hh b/VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/T140TextRTPSink.hh
new file mode 100644
index 0000000..448592f
--- /dev/null
+++ b/VisitFace/RtspNativeCodec/app/libs/live555/include/liveMedia/T140TextRTPSink.hh
@@ -0,0 +1,103 @@
+/**********
+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.
+// RTP sink for T.140 text (RFC 2793)
+// C++ header
+
+#ifndef _T140_TEXT_RTP_SINK_HH
+#define _T140_TEXT_RTP_SINK_HH
+
+#ifndef _TEXT_RTP_SINK_HH
+#include "TextRTPSink.hh"
+#endif
+#ifndef _FRAMED_FILTER_HH
+#include "FramedFilter.hh"
+#endif
+
+class T140IdleFilter;
+
+class T140TextRTPSink: public TextRTPSink {
+public:
+ static T140TextRTPSink* createNew(UsageEnvironment& env, Groupsock* RTPgs, unsigned char rtpPayloadFormat);
+
+protected:
+ T140TextRTPSink(UsageEnvironment& env, Groupsock* RTPgs, unsigned char rtpPayloadFormat);
+ // called only by createNew()
+
+ virtual ~T140TextRTPSink();
+
+protected: // redefined virtual functions:
+ virtual Boolean continuePlaying();
+ virtual void doSpecialFrameHandling(unsigned fragmentationOffset,
+ unsigned char* frameStart,
+ unsigned numBytesInFrame,
+ struct timeval framePresentationTime,
+ unsigned numRemainingBytes);
+ virtual Boolean frameCanAppearAfterPacketStart(unsigned char const* frameStart,
+ unsigned numBytesInFrame) const;
+
+protected:
+ T140IdleFilter* fOurIdleFilter;
+ Boolean fAreInIdlePeriod;
+};
+
+
+////////// T140IdleFilter definition //////////
+
+// Because the T.140 text RTP payload format specification recommends that (empty) RTP packets be sent during 'idle periods'
+// when no new text is available, we implement "T140TextRTPSink" using a separate "T140IdleFilter" class - sitting in front
+// - that delivers, to the "T140TextRTPSink", a continuous sequence of (possibly) empty frames.
+// (Note: This class should be used only by "T140TextRTPSink", or a subclass.)
+
+class T140IdleFilter: public FramedFilter {
+public:
+ T140IdleFilter(UsageEnvironment& env, FramedSource* inputSource);
+ virtual ~T140IdleFilter();
+
+private: // redefined virtual functions:
+ virtual void doGetNextFrame();
+ virtual void doStopGettingFrames();
+
+private:
+ static void afterGettingFrame(void* clientData, unsigned frameSize,
+ unsigned numTruncatedBytes,
+ struct timeval presentationTime,
+ unsigned durationInMicroseconds);
+ void afterGettingFrame(unsigned frameSize,
+ unsigned numTruncatedBytes,
+ struct timeval presentationTime,
+ unsigned durationInMicroseconds);
+
+ static void handleIdleTimeout(void* clientData);
+ void handleIdleTimeout();
+
+ void deliverFromBuffer();
+ void deliverEmptyFrame();
+
+ static void onSourceClosure(void* clientData);
+ void onSourceClosure();
+
+private:
+ TaskToken fIdleTimerTask;
+ unsigned fBufferSize, fNumBufferedBytes;
+ char* fBuffer;
+ unsigned fBufferedNumTruncatedBytes; // a count of truncated bytes from the upstream
+ struct timeval fBufferedDataPresentationTime;
+ unsigned fBufferedDataDurationInMicroseconds;
+};
+
+#endif
--
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