New file |
| | |
| | | /********** |
| | | 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. |
| | | // MPEG-4 audio, using LATM multiplexing |
| | | // C++ header |
| | | |
| | | #ifndef _MPEG4_LATM_AUDIO_RTP_SOURCE_HH |
| | | #define _MPEG4_LATM_AUDIO_RTP_SOURCE_HH |
| | | |
| | | #ifndef _MULTI_FRAMED_RTP_SOURCE_HH |
| | | #include "MultiFramedRTPSource.hh" |
| | | #endif |
| | | |
| | | class MPEG4LATMAudioRTPSource: public MultiFramedRTPSource { |
| | | public: |
| | | static MPEG4LATMAudioRTPSource* |
| | | createNew(UsageEnvironment& env, Groupsock* RTPgs, |
| | | unsigned char rtpPayloadFormat, |
| | | unsigned rtpTimestampFrequency); |
| | | |
| | | // By default, the LATM data length field is included at the beginning of each |
| | | // returned frame. To omit this field, call the following: |
| | | void omitLATMDataLengthField(); |
| | | |
| | | Boolean returnedFrameIncludesLATMDataLengthField() const { return fIncludeLATMDataLengthField; } |
| | | |
| | | protected: |
| | | virtual ~MPEG4LATMAudioRTPSource(); |
| | | |
| | | private: |
| | | MPEG4LATMAudioRTPSource(UsageEnvironment& env, Groupsock* RTPgs, |
| | | unsigned char rtpPayloadFormat, |
| | | unsigned rtpTimestampFrequency); |
| | | // called only by createNew() |
| | | |
| | | private: |
| | | // redefined virtual functions: |
| | | virtual Boolean processSpecialHeader(BufferedPacket* packet, |
| | | unsigned& resultSpecialHeaderSize); |
| | | virtual char const* MIMEtype() const; |
| | | |
| | | private: |
| | | Boolean fIncludeLATMDataLengthField; |
| | | }; |
| | | |
| | | |
| | | // A utility for parsing a "StreamMuxConfig" string |
| | | Boolean |
| | | parseStreamMuxConfigStr(char const* configStr, |
| | | // result parameters: |
| | | Boolean& audioMuxVersion, |
| | | Boolean& allStreamsSameTimeFraming, |
| | | unsigned char& numSubFrames, |
| | | unsigned char& numProgram, |
| | | unsigned char& numLayer, |
| | | unsigned char*& audioSpecificConfig, |
| | | unsigned& audioSpecificConfigSize); |
| | | // Parses "configStr" as a sequence of hexadecimal digits, representing |
| | | // a "StreamMuxConfig" (as defined in ISO.IEC 14496-3, table 1.21). |
| | | // Returns, in "audioSpecificConfig", a binary representation of |
| | | // the enclosed "AudioSpecificConfig" structure (of size |
| | | // "audioSpecificConfigSize" bytes). The memory for this is allocated |
| | | // dynamically by this function; the caller is responsible for |
| | | // freeing it. Other values, that precede "AudioSpecificConfig", |
| | | // are returned in the other parameters. |
| | | // Returns True iff the parsing succeeds. |
| | | // IMPORTANT NOTE: The implementation of this function currently assumes |
| | | // that everything after the first "numLayer" field is an |
| | | // "AudioSpecificConfig". Therefore, it will not work properly if |
| | | // "audioMuxVersion" != 0, "numProgram" > 0, or "numLayer" > 0. |
| | | // Also, any 'other data' or CRC info will be included at |
| | | // the end of "audioSpecificConfig". |
| | | |
| | | unsigned char* parseStreamMuxConfigStr(char const* configStr, |
| | | // result parameter: |
| | | unsigned& audioSpecificConfigSize); |
| | | // A variant of the above that returns just the "AudioSpecificConfig" data |
| | | // (or NULL) if the parsing failed, without bothering with the other |
| | | // result parameters. |
| | | |
| | | unsigned char* parseGeneralConfigStr(char const* configStr, |
| | | // result parameter: |
| | | unsigned& configSize); |
| | | // A routine that parses an arbitrary config string, returning |
| | | // the result in binary form. |
| | | |
| | | #endif |