66 lines
2.2 KiB
C++
Executable File
66 lines
2.2 KiB
C++
Executable File
/**********
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This library is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
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This library is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**********/
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// "liveMedia"
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// Copyright (c) 1996-2016 Live Networks, Inc. All rights reserved.
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// DV Video RTP Sources
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// Implementation
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#include "DVVideoRTPSource.hh"
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DVVideoRTPSource*
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DVVideoRTPSource::createNew(UsageEnvironment& env,
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Groupsock* RTPgs,
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unsigned char rtpPayloadFormat,
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unsigned rtpTimestampFrequency) {
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return new DVVideoRTPSource(env, RTPgs, rtpPayloadFormat, rtpTimestampFrequency);
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}
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DVVideoRTPSource::DVVideoRTPSource(UsageEnvironment& env,
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Groupsock* rtpGS,
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unsigned char rtpPayloadFormat,
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unsigned rtpTimestampFrequency)
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: MultiFramedRTPSource(env, rtpGS,
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rtpPayloadFormat, rtpTimestampFrequency) {
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}
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DVVideoRTPSource::~DVVideoRTPSource() {
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}
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#define DV_DIF_BLOCK_SIZE 80
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#define DV_SECTION_HEADER 0x1F
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Boolean DVVideoRTPSource
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::processSpecialHeader(BufferedPacket* packet,
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unsigned& resultSpecialHeaderSize) {
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unsigned const packetSize = packet->dataSize();
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if (packetSize < DV_DIF_BLOCK_SIZE) return False; // TARFU!
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u_int8_t const* data = packet->data();
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fCurrentPacketBeginsFrame = data[0] == DV_SECTION_HEADER && (data[1]&0xf8) == 0 && data[2] == 0; // thanks to Ben Hutchings
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// The RTP "M" (marker) bit indicates the last fragment of a frame:
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fCurrentPacketCompletesFrame = packet->rtpMarkerBit();
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// There is no special header
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resultSpecialHeaderSize = 0;
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return True;
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}
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char const* DVVideoRTPSource::MIMEtype() const {
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return "video/DV";
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}
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