Very rough first start, not even everything added
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af3619d4fa
88 changed files with 24251 additions and 0 deletions
540
PlaylistBroadcaster.tproj/playlist_parsers.cpp
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540
PlaylistBroadcaster.tproj/playlist_parsers.cpp
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/*
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*
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*/
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#include "playlist_parsers.h"
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char* SDPFileParser::sMediaTag = "m";
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char* SDPFileParser::sAttributeTag = "a";
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char* SDPFileParser::sConnectionTag = "c";
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SDPFileParser::~SDPFileParser()
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{
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if (fSDPBuff)
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{ delete[] fSDPBuff;
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fSDPBuff = NULL;
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}
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}
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bool SDPFileParser::IsCommented(SimpleString *theString)
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{
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if ( NULL == theString) return false;
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if ( theString->fLen == 0) return false;
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if ( theString->fTheString[0] == '#' ) return true; // It's commented if the first non-white char is #
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return false;
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}
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int TextLine::Parse (SimpleString *textStrPtr)
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{
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short count = 0;
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do
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{
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if (!textStrPtr) break;
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count = CountDelimeters(textStrPtr,sWordDelimeters);
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if (count < 1) break;
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fWords.SetSize(count);
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fSource = *textStrPtr;
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SimpleString *listStringPtr = fWords.Begin();
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SimpleString currentString;
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currentString.SetString(textStrPtr->fTheString, 0);
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for ( short i = 0; i < count; i ++)
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{ GetNextThing(textStrPtr,¤tString, sWordDelimeters, ¤tString);
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*listStringPtr = currentString;
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listStringPtr++;
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}
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} while (false);
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return count;
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}
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int LineAndWordsParser::Parse (SimpleString *textStrPtr)
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{
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short count = 0;
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do
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{
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if (!textStrPtr) break;
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count = CountDelimeters(textStrPtr,sLineDelimeters);
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if (count < 1) break;
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fLines.SetSize(count);
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fSource = *textStrPtr;
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TextLine *listStringPtr = fLines.Begin();
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SimpleString currentString;
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currentString.SetString(textStrPtr->fTheString, 0);
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for ( short i = 0; i < count; i ++)
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{ GetNextThing(textStrPtr,¤tString, sLineDelimeters, ¤tString);
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listStringPtr->Parse(¤tString);
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listStringPtr++;
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}
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} while (false);
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return count;
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}
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short SDPFileParser::CountQTTextLines()
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{
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short numlines = 0;
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TextLine *theLinePtr = fParser.fLines.Begin();
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while (theLinePtr)
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{ if (GetQTTextFromLine(theLinePtr))
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numlines ++;
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theLinePtr = fParser.fLines.Next();
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};
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return numlines;
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}
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short SDPFileParser::CountMediaEntries()
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{
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bool commented = false;
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bool isEqual = false;
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short numTracks = 0;
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TextLine *theLinePtr = fParser.fLines.Begin();
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SimpleString *firstWordPtr;
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while (theLinePtr)
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{
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do
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{ firstWordPtr = theLinePtr->fWords.Begin();
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if (!firstWordPtr) break;
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commented = IsCommented(firstWordPtr);
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if (commented) break;
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isEqual = Compare(firstWordPtr, SDPFileParser::sMediaTag, true);
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if (!isEqual) break;
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numTracks ++;
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} while (false);
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theLinePtr = fParser.fLines.Next();
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};
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return numTracks;
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}
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short SDPFileParser::CountRTPMapEntries()
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{
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short startPos = fParser.fLines.GetPos();
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short result = 0;
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TextLine *theLinePtr = fParser.fLines.Get();
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SimpleString mapString("rtpmap");
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SimpleString *aWordPtr;
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bool isEqual;
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while (theLinePtr)
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{
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aWordPtr = theLinePtr->fWords.Begin();
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if (aWordPtr)
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{
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isEqual = Compare(aWordPtr, SDPFileParser::sAttributeTag, true);
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if (isEqual) // see if this attribute is a rtpmap line
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{
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aWordPtr = theLinePtr->fWords.SetPos(1);
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isEqual = Compare(aWordPtr, &mapString, false);
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if (isEqual) result ++;
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}
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else // could be a comment or some other attribute
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{ isEqual = Compare(aWordPtr, SDPFileParser::sMediaTag, true);
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if (isEqual) break; // its another media line so stop
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}
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}
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theLinePtr = fParser.fLines.Next();
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};
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fParser.fLines.SetPos(startPos);
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return result;
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}
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void SDPFileParser::GetPayLoadsFromLine(TextLine *theLinePtr, TypeMap *theTypeMapPtr)
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{
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short count = 0;
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if (theLinePtr == NULL || theTypeMapPtr == NULL)
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return;
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SimpleString *aWordPtr = theLinePtr->fWords.SetPos(5);// get protocol ID str
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while (aWordPtr)
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{ count ++;
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aWordPtr = theLinePtr->fWords.Next();// get next protocol ID str
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}
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theTypeMapPtr->fPayLoads.SetSize(count);
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short* idPtr = theTypeMapPtr->fPayLoads.Begin();// get protocol ID ref
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aWordPtr = theLinePtr->fWords.SetPos(5);// get protocol ID str
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while (aWordPtr && idPtr)
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{
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*idPtr = (short) aWordPtr->GetInt();
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aWordPtr = theLinePtr->fWords.Next();// get next protocol ID str
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idPtr = theTypeMapPtr->fPayLoads.Next();// get next protocol ID ref
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}
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}
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bool SDPFileParser::GetQTTextFromLine(TextLine *theLinePtr)
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{
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//a=x-qt-text-cpy:xxxxx
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//a=x-qt-text-nam:xxxxxx
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//a=x-qt-text-inf:xxxxxxx
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bool result = false;
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SimpleString *aWordPtr;
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char *xString ="a=x-qt-text";
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do
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{
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aWordPtr = theLinePtr->fWords.Begin();
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if (!aWordPtr) break;
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bool isEqual = (0 == strncmp(aWordPtr->fTheString, xString,strlen(xString) ) ) ? true: false;
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if (!isEqual) break;
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result = true;
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} while (false);
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return result;
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}
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bool SDPFileParser::GetMediaFromLine(TextLine *theLinePtr, TypeMap *theTypeMapPtr)
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{
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bool result = false;
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SimpleString *aWordPtr;
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do
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{
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aWordPtr = theLinePtr->fWords.Begin();
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if (!aWordPtr) break;
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bool isEqual = Compare(aWordPtr, SDPFileParser::sMediaTag, true);
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if (!isEqual) break;
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aWordPtr = theLinePtr->fWords.SetPos(1);// get type
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if (!aWordPtr) break;
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theTypeMapPtr->fTheTypeStr = *aWordPtr;
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aWordPtr = theLinePtr->fWords.SetPos(2);// get movie port
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if (!aWordPtr) break;
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theTypeMapPtr->fPort = aWordPtr->GetInt();
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aWordPtr = theLinePtr->fWords.SetPos(3);// get protocol
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if (!aWordPtr) break;
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theTypeMapPtr->fProtocolStr = *aWordPtr;
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GetPayLoadsFromLine(theLinePtr, theTypeMapPtr);
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result = true;
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} while (false);
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return result;
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}
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bool SDPFileParser::GetRTPMap(TextLine *theLinePtr,PayLoad *payloadPtr)
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{
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bool lineOK = false;
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SimpleString *aWordPtr;
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SimpleString mapString("rtpmap");
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do
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{
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if (!theLinePtr || !payloadPtr) break;
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aWordPtr = theLinePtr->fWords.SetPos(1); // the attribute name
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if (!aWordPtr) break;
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if (!Compare(aWordPtr, &mapString, false))
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break;
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aWordPtr = theLinePtr->fWords.Next(); // the Payload ID
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if (!aWordPtr) break;
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payloadPtr->payloadID = aWordPtr->GetInt();
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aWordPtr = theLinePtr->fWords.Next(); // the Payload type string
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if (!aWordPtr) break;
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payloadPtr->payLoadString = *aWordPtr;
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payloadPtr->timeScale = 0;
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aWordPtr = theLinePtr->fWords.Next(); // the Payload timeScale
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if (aWordPtr)
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payloadPtr->timeScale = aWordPtr->GetInt();
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lineOK = true;
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} while (false);
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return lineOK;
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}
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TextLine *SDPFileParser::GetRTPMapLines(TextLine *theLinePtr,TypeMap *theTypeMapPtr)
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{
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do
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{
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if (!theLinePtr || !theTypeMapPtr) break;
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short numAttributes = CountRTPMapEntries();
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theTypeMapPtr->fPayLoadTypes.SetSize(numAttributes);
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PayLoad *payloadPtr = theTypeMapPtr->fPayLoadTypes.Begin();
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while( theLinePtr && payloadPtr && (numAttributes > 0) )
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{
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bool haveMAP = GetRTPMap(theLinePtr,payloadPtr);
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if (haveMAP)
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{ numAttributes --;
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payloadPtr = theTypeMapPtr->fPayLoadTypes.Next(); //skip to next payload entry
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}
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theLinePtr = fParser.fLines.Next(); // skip to next line
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if(theLinePtr == NULL || Compare(theLinePtr->fWords.Begin(), SDPFileParser::sMediaTag, true)) //stop checking if this is a new media line
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break;
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}
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} while (false);
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return theLinePtr;
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}
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TextLine * SDPFileParser::GetTrackID(TextLine *theLinePtr,TypeMap *theTypeMapPtr)
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{
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SimpleString *aFieldPtr;
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SimpleString *aWordPtr;
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Bool16 foundID = false;
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while(theLinePtr && !foundID)
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{
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if(Compare(theLinePtr->fWords.Begin(), SDPFileParser::sMediaTag, true)) //stop checking if this is a new media line
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break;
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do
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{
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SimpleString controlString("control");
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aFieldPtr = theLinePtr->fWords.Begin();
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if (!aFieldPtr) break;
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bool isEqual = Compare(aFieldPtr, SDPFileParser::sAttributeTag, true);
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if (!isEqual) break;
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aWordPtr = theLinePtr->fWords.SetPos(1);
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if (!aWordPtr) break;
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isEqual = Compare(aWordPtr, &controlString, false);
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if (!isEqual) break;
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aWordPtr = theLinePtr->fWords.SetPos(3);
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if (!aWordPtr) break;
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theTypeMapPtr->fTrackID = aWordPtr->GetInt();
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foundID = true;
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} while (false);
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theLinePtr = fParser.fLines.Next();
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}
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return theLinePtr;
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}
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bool SDPFileParser::ParseIPString(TextLine *theLinePtr)
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{
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bool result = false;
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SimpleString *aWordPtr;
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do
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{
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SimpleString ipIDString("IP4");
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aWordPtr = theLinePtr->fWords.Begin();
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if (!aWordPtr) break;
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bool isEqual = Compare(aWordPtr,SDPFileParser::sConnectionTag, true);
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if (!isEqual) break;
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aWordPtr = theLinePtr->fWords.SetPos(2);
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if (!aWordPtr) break;
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isEqual = Compare(aWordPtr, &ipIDString, false);
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if (!isEqual) break;
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aWordPtr = theLinePtr->fWords.SetPos(3);
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if (!aWordPtr) break;
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fIPAddressString.SetString(aWordPtr->fTheString, aWordPtr->fLen);
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result = true;
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} while (false);
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return result;
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}
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SInt32 SDPFileParser::ParseSDP(char *theBuff)
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{
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SInt32 result = 0;
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bool found = false;
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SimpleString source(theBuff);
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fSource.SetString( theBuff, strlen(theBuff) );
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fParser.Parse(&source);
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// Test parse
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#if 0
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qtss_printf("-----------------------------------------------------\n");
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char tempString[256];
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TextLine *theLine = fParser.fLines.Begin();
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while (theLine)
|
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{ SimpleString *theWord = theLine->fWords.Begin();
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while (theWord)
|
||||
{ theWord->GetString(tempString,256);
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qtss_printf(tempString);
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theWord = theLine->fWords.Next();
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if (theWord) qtss_printf(" _ ");
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}
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theLine = fParser.fLines.Next();
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qtss_printf("\n");
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}
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// exit (0);
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#endif
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||||
fNumQTTextLines = CountQTTextLines();
|
||||
fQTTextLines.SetSize( (SInt16) fNumQTTextLines);
|
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SimpleString *theQTTextPtr = fQTTextLines.Begin();
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|
||||
fNumTracks = CountMediaEntries();
|
||||
fSDPMediaList.SetSize((SInt16) fNumTracks);
|
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|
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TextLine *theLinePtr = fParser.fLines.Begin();
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TypeMap *theTypeMapPtr = fSDPMediaList.Begin();
|
||||
|
||||
bool foundIP = false;
|
||||
while (theLinePtr && theTypeMapPtr)
|
||||
{
|
||||
if (foundIP == false)
|
||||
{ foundIP = ParseIPString(theLinePtr);
|
||||
}
|
||||
|
||||
if (theQTTextPtr && GetQTTextFromLine(theLinePtr))
|
||||
{ SimpleString *srcLinePtr = theLinePtr->fWords.Begin();
|
||||
theQTTextPtr->SetString(srcLinePtr->fTheString, strcspn(srcLinePtr->fTheString, "\r\n") );
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||||
theQTTextPtr = fQTTextLines.Next();
|
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}
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||||
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||||
found = GetMediaFromLine(theLinePtr, theTypeMapPtr);
|
||||
if (found)
|
||||
{
|
||||
theLinePtr = fParser.fLines.Next();
|
||||
if (!theLinePtr) break; // no more lines to process
|
||||
|
||||
int startLine = fParser.fLines.GetPos();
|
||||
|
||||
theLinePtr = fParser.fLines.SetPos(startLine);
|
||||
(void) GetRTPMapLines(theLinePtr,theTypeMapPtr);
|
||||
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theLinePtr = fParser.fLines.SetPos(startLine);
|
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(void) GetTrackID(theLinePtr,theTypeMapPtr);
|
||||
|
||||
theLinePtr = fParser.fLines.SetPos(startLine);
|
||||
theTypeMapPtr = fSDPMediaList.Next();
|
||||
continue;
|
||||
}
|
||||
|
||||
theLinePtr = fParser.fLines.Next();
|
||||
}
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||||
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
|
||||
SInt32 SDPFileParser::ReadSDP(char *filename)
|
||||
{
|
||||
int result = -1;
|
||||
SInt32 bytes= 0;
|
||||
|
||||
FILE *f = NULL;
|
||||
|
||||
if (fSDPBuff != NULL)
|
||||
{ delete[] fSDPBuff;
|
||||
fSDPBuff = NULL;
|
||||
}
|
||||
|
||||
do
|
||||
{
|
||||
f = ::fopen(filename, "r");
|
||||
if (f == NULL) break;
|
||||
|
||||
result = 1;
|
||||
result = ::fseek(f, 0, SEEK_SET);
|
||||
if (result != 0) break;
|
||||
|
||||
fSDPBuff = new char[cMaxBytes + 1];
|
||||
if (NULL == fSDPBuff) break;
|
||||
fSDPBuff[cMaxBytes] = 0;
|
||||
|
||||
bytes = ::fread(fSDPBuff, sizeof(char), cMaxBytes, f);
|
||||
if (bytes < 1) break;
|
||||
fSDPBuff[bytes] = 0;
|
||||
|
||||
result = ParseSDP(fSDPBuff);
|
||||
if (result != 0) break;
|
||||
|
||||
result = 0;
|
||||
|
||||
} while (false);
|
||||
|
||||
if (f != NULL)
|
||||
{ ::fclose (f);
|
||||
f = NULL;
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue