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zm_sdp.cpp
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//
// ZoneMinder SDP Class Implementation, $Date: 2009-04-14 21:20:02 +0100 (Tue, 14 Apr 2009) $, $Revision: 2850 $
// Copyright (C) 2001-2008 Philip Coombes
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
#include "zm.h"
#if HAVE_LIBAVFORMAT
#include "zm_sdp.h"
#if (LIBAVCODEC_VERSION_CHECK(52, 64, 0, 64, 0) || LIBAVUTIL_VERSION_CHECK(50, 14, 0, 14, 0))
SessionDescriptor::StaticPayloadDesc SessionDescriptor::smStaticPayloads[] = {
{ 0, "PCMU", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_MULAW, 8000, 1 },
{ 3, "GSM", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1 },
{ 4, "G723", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1 },
{ 5, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1 },
{ 6, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 16000, 1 },
{ 7, "LPC", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1 },
{ 8, "PCMA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_ALAW, 8000, 1 },
{ 9, "G722", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1 },
{ 10, "L16", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_S16BE, 44100, 2 },
{ 11, "L16", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_S16BE, 44100, 1 },
{ 12, "QCELP", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_QCELP, 8000, 1 },
{ 13, "CN", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1 },
{ 14, "MPA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP2, -1, -1 },
{ 14, "MPA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3, -1, -1 },
{ 15, "G728", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1 },
{ 16, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 11025, 1 },
{ 17, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 22050, 1 },
{ 18, "G729", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1 },
{ 25, "CelB", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_NONE, 90000, -1 },
{ 26, "JPEG", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MJPEG, 90000, -1 },
{ 28, "nv", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_NONE, 90000, -1 },
{ 31, "H261", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H261, 90000, -1 },
{ 32, "MPV", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG1VIDEO, 90000, -1 },
{ 32, "MPV", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO, 90000, -1 },
{ 33, "MP2T", AVMEDIA_TYPE_DATA, AV_CODEC_ID_MPEG2TS, 90000, -1 },
{ 34, "H263", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H263, 90000, -1 },
{ -1, "", AVMEDIA_TYPE_UNKNOWN, AV_CODEC_ID_NONE, -1, -1 }
};
SessionDescriptor::DynamicPayloadDesc SessionDescriptor::smDynamicPayloads[] = {
{ "MP4V-ES", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
{ "mpeg4-generic", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
{ "H264", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
{ "AMR", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AMR_NB },
{ "vnd.onvif.metadata", AVMEDIA_TYPE_DATA, AV_CODEC_ID_NONE }
};
#else
SessionDescriptor::StaticPayloadDesc SessionDescriptor::smStaticPayloads[] = {
{ 0, "PCMU", CODEC_TYPE_AUDIO, CODEC_ID_PCM_MULAW, 8001, 1 },
{ 3, "GSM", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1 },
{ 4, "G723", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1 },
{ 5, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1 },
{ 6, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 16000, 1 },
{ 7, "LPC", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1 },
{ 8, "PCMA", CODEC_TYPE_AUDIO, CODEC_ID_PCM_ALAW, 8000, 1 },
{ 9, "G722", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1 },
{ 10, "L16", CODEC_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 2 },
{ 11, "L16", CODEC_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 1 },
{ 12, "QCELP", CODEC_TYPE_AUDIO, CODEC_ID_QCELP, 8000, 1 },
{ 13, "CN", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1 },
{ 14, "MPA", CODEC_TYPE_AUDIO, CODEC_ID_MP2, -1, -1 },
{ 14, "MPA", CODEC_TYPE_AUDIO, CODEC_ID_MP3, -1, -1 },
{ 15, "G728", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1 },
{ 16, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 11025, 1 },
{ 17, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 22050, 1 },
{ 18, "G729", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1 },
{ 25, "CelB", CODEC_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1 },
{ 26, "JPEG", CODEC_TYPE_VIDEO, CODEC_ID_MJPEG, 90000, -1 },
{ 28, "nv", CODEC_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1 },
{ 31, "H261", CODEC_TYPE_VIDEO, CODEC_ID_H261, 90000, -1 },
{ 32, "MPV", CODEC_TYPE_VIDEO, CODEC_ID_MPEG1VIDEO, 90000, -1 },
{ 32, "MPV", CODEC_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO, 90000, -1 },
{ 33, "MP2T", CODEC_TYPE_DATA, CODEC_ID_MPEG2TS, 90000, -1 },
{ 34, "H263", CODEC_TYPE_VIDEO, CODEC_ID_H263, 90000, -1 },
{ -1, "", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1 }
};
SessionDescriptor::DynamicPayloadDesc SessionDescriptor::smDynamicPayloads[] = {
{ "MP4V-ES", CODEC_TYPE_VIDEO, CODEC_ID_MPEG4 },
{ "mpeg4-generic", CODEC_TYPE_AUDIO, CODEC_ID_AAC },
{ "H264", CODEC_TYPE_VIDEO, CODEC_ID_H264 },
{ "AMR", CODEC_TYPE_AUDIO, CODEC_ID_AMR_NB },
{ "vnd.onvif.metadata", CODEC_TYPE_DATA, CODEC_ID_NONE }
};
#endif
SessionDescriptor::ConnInfo::ConnInfo( const std::string &connInfo ) :
mTtl( 16 ),
mNoAddresses( 0 )
{
StringVector tokens = split( connInfo, " " );
if ( tokens.size() < 3 )
throw Exception( "Unable to parse SDP connection info from '"+connInfo+"'" );
mNetworkType = tokens[0];
if ( mNetworkType != "IN" )
throw Exception( "Invalid SDP network type '"+mNetworkType+"' in connection info '"+connInfo+"'" );
mAddressType = tokens[1];
if ( mAddressType != "IP4" )
throw Exception( "Invalid SDP address type '"+mAddressType+"' in connection info '"+connInfo+"'" );
StringVector addressTokens = split( tokens[2], "/" );
if ( addressTokens.size() < 1 )
throw Exception( "Invalid SDP address '"+tokens[2]+"' in connection info '"+connInfo+"'" );
mAddress = addressTokens[0];
if ( addressTokens.size() >= 2 )
mTtl = atoi(addressTokens[1].c_str());
if ( addressTokens.size() >= 3 )
mNoAddresses = atoi(addressTokens[2].c_str());
}
SessionDescriptor::BandInfo::BandInfo( const std::string &bandInfo ) :
mValue( 0 )
{
StringVector tokens = split( bandInfo, ":" );
if ( tokens.size() < 2 )
throw Exception( "Unable to parse SDP bandwidth info from '"+bandInfo+"'" );
mType = tokens[0];
//if ( mNetworkType != "IN" )
//throw Exception( "Invalid SDP network type '"+mNetworkType+"' in connection info '"+connInfo+"'" );
mValue = atoi(tokens[1].c_str());
}
SessionDescriptor::MediaDescriptor::MediaDescriptor( const std::string &type, int port, int numPorts, const std::string &transport, int payloadType ) :
mType( type ),
mPort( port ),
mNumPorts( numPorts ),
mTransport( transport ),
mPayloadType( payloadType ),
mFrameRate( 0.0 ),
mClock( 0 ),
mWidth( 0 ),
mHeight( 0 ),
mSprops( "" ),
mConnInfo( 0 )
{
}
SessionDescriptor::SessionDescriptor( const std::string &url, const std::string &sdp ) :
mUrl( url ),
mConnInfo( 0 ),
mBandInfo( 0 )
{
MediaDescriptor *currMedia = 0;
StringVector lines = split( sdp, "\r\n" );
for ( StringVector::const_iterator iter = lines.begin(); iter != lines.end(); iter++ )
{
std::string line = *iter;
if ( line.empty() )
break;
Debug( 3, "Processing SDP line '%s'", line.c_str() );
const char sdpType = line[0];
if ( line[1] != '=' )
throw Exception( "Invalid SDP format at '"+line+"'" );
line.erase( 0, 2 );
switch( sdpType )
{
case 'v' :
mVersion = line;
break;
case 'o' :
mOwner = line;
break;
case 's' :
mName = line;
break;
case 'i' :
mInfo = line;
break;
case 'c' :
// This prevent a memory leak if the field appears more than one time
if ( mConnInfo )
delete mConnInfo;
mConnInfo = new ConnInfo( line );
break;
case 'b' :
// This prevent a memory leak if the field appears more than one time
if ( mBandInfo )
delete mBandInfo;
mBandInfo = new BandInfo( line );
break;
case 't' :
mTimeInfo = line;
break;
case 'a' :
{
mAttributes.push_back( line );
StringVector tokens = split( line, ":", 2 );
std::string attrName = tokens[0];
if ( currMedia )
{
if ( attrName == "control" )
{
if ( tokens.size() < 2 )
throw Exception( "Unable to parse SDP control attribute '"+line+"' for media '"+currMedia->getType()+"'" );
currMedia->setControlUrl( tokens[1] );
}
else if ( attrName == "range" )
{
}
else if ( attrName == "rtpmap" )
{
// a=rtpmap:96 MP4V-ES/90000
if ( tokens.size() < 2 )
throw Exception( "Unable to parse SDP rtpmap attribute '"+line+"' for media '"+currMedia->getType()+"'" );
StringVector attrTokens = split( tokens[1], " " );
int payloadType = atoi(attrTokens[0].c_str());
if ( payloadType != currMedia->getPayloadType() )
throw Exception( stringtf( "Payload type mismatch, expected %d, got %d in '%s'", currMedia->getPayloadType(), payloadType, line.c_str() ) );
std::string payloadDesc = attrTokens[1];
//currMedia->setPayloadType( payloadType );
if ( attrTokens.size() > 1 )
{
StringVector payloadTokens = split( attrTokens[1], "/" );
std::string payloadDesc = payloadTokens[0];
int payloadClock = atoi(payloadTokens[1].c_str());
currMedia->setPayloadDesc( payloadDesc );
currMedia->setClock( payloadClock );
}
}
else if ( attrName == "framesize" )
{
// a=framesize:96 320-240
if ( tokens.size() < 2 )
throw Exception( "Unable to parse SDP framesize attribute '"+line+"' for media '"+currMedia->getType()+"'" );
StringVector attrTokens = split( tokens[1], " " );
int payloadType = atoi(attrTokens[0].c_str());
if ( payloadType != currMedia->getPayloadType() )
throw Exception( stringtf( "Payload type mismatch, expected %d, got %d in '%s'", currMedia->getPayloadType(), payloadType, line.c_str() ) );
//currMedia->setPayloadType( payloadType );
StringVector sizeTokens = split( attrTokens[1], "-" );
int width = atoi(sizeTokens[0].c_str());
int height = atoi(sizeTokens[1].c_str());
currMedia->setFrameSize( width, height );
}
else if ( attrName == "framerate" )
{
// a=framerate:5.0
if ( tokens.size() < 2 )
throw Exception( "Unable to parse SDP framerate attribute '"+line+"' for media '"+currMedia->getType()+"'" );
double frameRate = atof(tokens[1].c_str());
currMedia->setFrameRate( frameRate );
}
else if ( attrName == "fmtp" )
{
// a=fmtp:96 profile-level-id=247; config=000001B0F7000001B509000001000000012008D48D8803250F042D14440F
if ( tokens.size() < 2 )
throw Exception( "Unable to parse SDP fmtp attribute '"+line+"' for media '"+currMedia->getType()+"'" );
StringVector attrTokens = split( tokens[1], " ", 2 );
int payloadType = atoi(attrTokens[0].c_str());
if ( payloadType != currMedia->getPayloadType() )
throw Exception( stringtf( "Payload type mismatch, expected %d, got %d in '%s'", currMedia->getPayloadType(), payloadType, line.c_str() ) );
//currMedia->setPayloadType( payloadType );
if ( attrTokens.size() > 1 )
{
StringVector attr2Tokens = split( attrTokens[1], "; " );
for ( unsigned int i = 0; i < attr2Tokens.size(); i++ )
{
StringVector attr3Tokens = split( attr2Tokens[i], "=" );
//Info( "Name = %s, Value = %s", attr3Tokens[0].c_str(), attr3Tokens[1].c_str() );
if ( attr3Tokens[0] == "profile-level-id" )
{
}
else if ( attr3Tokens[0] == "config" )
{
}
else if ( attr3Tokens[0] == "sprop-parameter-sets" )
{
size_t t = attr2Tokens[i].find("=");
char *c = (char *)attr2Tokens[i].c_str() + t + 1;
Debug(4, "sprop-parameter-sets value %s", c);
currMedia->setSprops(std::string(c));
}
else if ( attr3Tokens[0] == "sprop-parameter-sets" )
{
size_t t = attr2Tokens[i].find("=");
char *c = (char *)attr2Tokens[i].c_str() + t + 1;
Debug(4, "sprop-parameter-sets value %s", c);
currMedia->setSprops(std::string(c));
}
else
{
Debug( 3, "Ignoring SDP fmtp attribute '%s' for media '%s'", attr3Tokens[0].c_str(), currMedia->getType().c_str() )
}
}
}
}
else if ( attrName == "mpeg4-iod" )
{
// a=mpeg4-iod: "data:application/mpeg4-iod;base64,AoEAAE8BAf73AQOAkwABQHRkYXRhOmFwcGxpY2F0aW9uL21wZWc0LW9kLWF1O2Jhc2U2NCxBVGdCR3dVZkF4Y0F5U1FBWlFRTklCRUVrK0FBQWEyd0FBR3RzQVlCQkFFWkFwOERGUUJsQlFRTlFCVUFDN2dBQVBvQUFBRDZBQVlCQXc9PQQNAQUABAAAAAAAAAAAAAYJAQAAAAAAAAAAA0IAAkA+ZGF0YTphcHBsaWNhdGlvbi9tcGVnNC1iaWZzLWF1O2Jhc2U2NCx3QkFTZ1RBcUJYSmhCSWhRUlFVL0FBPT0EEgINAAACAAAAAAAAAAAFAwAAQAYJAQAAAAAAAAAA"
}
else if ( attrName == "mpeg4-esid" )
{
// a=mpeg4-esid:201
}
else
{
Debug( 3, "Ignoring SDP attribute '%s' for media '%s'", line.c_str(), currMedia->getType().c_str() )
}
}
else
{
Debug( 3, "Ignoring general SDP attribute '%s'", line.c_str() );
}
break;
}
case 'm' :
{
StringVector tokens = split( line, " " );
if ( tokens.size() < 4 )
throw Exception( "Can't parse SDP media description '"+line+"'" );
std::string mediaType = tokens[0];
if ( mediaType != "audio" && mediaType != "video" && mediaType != "application" )
throw Exception( "Unsupported media type '"+mediaType+"' in SDP media attribute '"+line+"'" );
StringVector portTokens = split( tokens[1], "/" );
int mediaPort = atoi(portTokens[0].c_str());
int mediaNumPorts = 1;
if ( portTokens.size() > 1 )
mediaNumPorts = atoi(portTokens[1].c_str());
std::string mediaTransport = tokens[2];
if ( mediaTransport != "RTP/AVP" )
throw Exception( "Unsupported media transport '"+mediaTransport+"' in SDP media attribute '"+line+"'" );
int payloadType = atoi(tokens[3].c_str());
currMedia = new MediaDescriptor( mediaType, mediaPort, mediaNumPorts, mediaTransport, payloadType );
mMediaList.push_back( currMedia );
break;
}
}
}
}
SessionDescriptor::~SessionDescriptor()
{
if ( mConnInfo )
delete mConnInfo;
if ( mBandInfo )
delete mBandInfo;
for ( unsigned int i = 0; i < mMediaList.size(); i++ )
delete mMediaList[i];
}
AVFormatContext *SessionDescriptor::generateFormatContext() const
{
AVFormatContext *formatContext = avformat_alloc_context();
strncpy( formatContext->filename, mUrl.c_str(), sizeof(formatContext->filename) );
/*
if ( mName.length() )
strncpy( formatContext->title, mName.c_str(), sizeof(formatContext->title) );
if ( mInfo.length() )
strncpy( formatContext->comment, mInfo.c_str(), sizeof(formatContext->comment) );
*/
//formatContext->nb_streams = mMediaList.size();
for ( unsigned int i = 0; i < mMediaList.size(); i++ )
{
const MediaDescriptor *mediaDesc = mMediaList[i];
#if !LIBAVFORMAT_VERSION_CHECK(53, 10, 0, 17, 0)
AVStream *stream = av_new_stream( formatContext, i );
#else
AVStream *stream = avformat_new_stream( formatContext, NULL );
stream->id = i;
#endif
Debug( 1, "Looking for codec for %s payload type %d / %s", mediaDesc->getType().c_str(), mediaDesc->getPayloadType(), mediaDesc->getPayloadDesc().c_str() );
#if (LIBAVCODEC_VERSION_CHECK(52, 64, 0, 64, 0) || LIBAVUTIL_VERSION_CHECK(50, 14, 0, 14, 0))
if ( mediaDesc->getType() == "video" )
stream->codec->codec_type = AVMEDIA_TYPE_VIDEO;
else if ( mediaDesc->getType() == "audio" )
stream->codec->codec_type = AVMEDIA_TYPE_AUDIO;
else if ( mediaDesc->getType() == "application" )
stream->codec->codec_type = AVMEDIA_TYPE_DATA;
#else
if ( mediaDesc->getType() == "video" )
stream->codec->codec_type = CODEC_TYPE_VIDEO;
else if ( mediaDesc->getType() == "audio" )
stream->codec->codec_type = CODEC_TYPE_AUDIO;
else if ( mediaDesc->getType() == "application" )
stream->codec->codec_type = CODEC_TYPE_DATA;
#endif
#if LIBAVCODEC_VERSION_CHECK(55, 50, 3, 60, 103)
std::string codec_name;
#endif
if ( mediaDesc->getPayloadType() < PAYLOAD_TYPE_DYNAMIC )
{
// Look in static table
for ( unsigned int i = 0; i < (sizeof(smStaticPayloads)/sizeof(*smStaticPayloads)); i++ )
{
if ( smStaticPayloads[i].payloadType == mediaDesc->getPayloadType() )
{
Debug( 1, "Got static payload type %d, %s", smStaticPayloads[i].payloadType, smStaticPayloads[i].payloadName );
#if LIBAVCODEC_VERSION_CHECK(55, 50, 3, 60, 103)
codec_name = std::string( smStaticPayloads[i].payloadName );
#else
strncpy( stream->codec->codec_name, smStaticPayloads[i].payloadName, sizeof(stream->codec->codec_name) );;
#endif
stream->codec->codec_type = smStaticPayloads[i].codecType;
stream->codec->codec_id = smStaticPayloads[i].codecId;
stream->codec->sample_rate = smStaticPayloads[i].clockRate;
break;
}
}
}
else
{
// Look in dynamic table
for ( unsigned int i = 0; i < (sizeof(smDynamicPayloads)/sizeof(*smDynamicPayloads)); i++ )
{
if ( smDynamicPayloads[i].payloadName == mediaDesc->getPayloadDesc() )
{
Debug( 1, "Got dynamic payload type %d, %s", mediaDesc->getPayloadType(), smDynamicPayloads[i].payloadName );
#if LIBAVCODEC_VERSION_CHECK(55, 50, 3, 60, 103)
codec_name = std::string( smStaticPayloads[i].payloadName );
#else
strncpy( stream->codec->codec_name, smDynamicPayloads[i].payloadName, sizeof(stream->codec->codec_name) );;
#endif
stream->codec->codec_type = smDynamicPayloads[i].codecType;
stream->codec->codec_id = smDynamicPayloads[i].codecId;
stream->codec->sample_rate = mediaDesc->getClock();
break;
}
}
}
#if LIBAVCODEC_VERSION_CHECK(55, 50, 3, 60, 103)
if ( codec_name.empty() )
#else
if ( !stream->codec->codec_name[0] )
#endif
{
Warning( "Can't find payload details for %s payload type %d, name %s", mediaDesc->getType().c_str(), mediaDesc->getPayloadType(), mediaDesc->getPayloadDesc().c_str() );
//return( 0 );
}
if ( mediaDesc->getWidth() )
stream->codec->width = mediaDesc->getWidth();
if ( mediaDesc->getHeight() )
stream->codec->height = mediaDesc->getHeight();
if ( stream->codec->codec_id == AV_CODEC_ID_H264 && mediaDesc->getSprops().size())
{
uint8_t start_sequence[]= { 0, 0, 1 };
stream->codec->extradata_size= 0;
stream->codec->extradata= NULL;
char pvalue[1024], *value = pvalue;
strcpy(pvalue, mediaDesc->getSprops().c_str());
while (*value) {
char base64packet[1024];
uint8_t decoded_packet[1024];
uint32_t packet_size;
char *dst = base64packet;
while (*value && *value != ','
&& (dst - base64packet) < (long)(sizeof(base64packet)) - 1) {
*dst++ = *value++;
}
*dst++ = '\0';
if (*value == ',')
value++;
packet_size= av_base64_decode(decoded_packet, (const char *)base64packet, (int)sizeof(decoded_packet));
Hexdump(4, (char *)decoded_packet, packet_size);
if (packet_size) {
uint8_t *dest =
(uint8_t *)av_malloc(packet_size + sizeof(start_sequence) +
stream->codec->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
if(dest) {
if(stream->codec->extradata_size) {
// av_realloc?
memcpy(dest, stream->codec->extradata, stream->codec->extradata_size);
av_free(stream->codec->extradata);
}
memcpy(dest+stream->codec->extradata_size, start_sequence, sizeof(start_sequence));
memcpy(dest+stream->codec->extradata_size+sizeof(start_sequence), decoded_packet, packet_size);
memset(dest+stream->codec->extradata_size+sizeof(start_sequence)+
packet_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
stream->codec->extradata= dest;
stream->codec->extradata_size+= sizeof(start_sequence)+packet_size;
// } else {
// av_log(codec, AV_LOG_ERROR, "Unable to allocate memory for extradata!");
// return AVERROR(ENOMEM);
}
}
}
}
}
return( formatContext );
}
#endif // HAVE_LIBAVFORMAT