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zoneminder/src/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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#include "zm_sdp.h"
#include "zm_config.h"
#include "zm_exception.h"
#include "zm_logger.h"
#if HAVE_LIBAVFORMAT
#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" && mAddressType != "IP6" )
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( nullptr )
{
}
SessionDescriptor::SessionDescriptor( const std::string &url, const std::string &sdp ) :
mUrl( url ),
mConnInfo( nullptr ),
mBandInfo( nullptr )
{
MediaDescriptor *currMedia = nullptr;
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 {
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;
}
} // end switch
} // end foreach line
}
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();
#if (LIBAVFORMAT_VERSION_CHECK(58, 12, 0, 0, 100))
formatContext->url = av_strdup(mUrl.c_str());
#else
strncpy(formatContext->filename, mUrl.c_str(), sizeof(formatContext->filename));
#endif
/*
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, nullptr);
stream->id = i;
#endif
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
AVCodecContext *codec_context = avcodec_alloc_context3(nullptr);
#else
AVCodecContext *codec_context = stream->codec;
#endif
std::string type = mediaDesc->getType();
Debug(1, "Looking for codec for %s payload type %d / %s",
type.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 ( type == "video" )
codec_context->codec_type = AVMEDIA_TYPE_VIDEO;
else if ( type == "audio" )
codec_context->codec_type = AVMEDIA_TYPE_AUDIO;
else if ( type == "application" )
codec_context->codec_type = AVMEDIA_TYPE_DATA;
#else
if ( type == "video" )
codec_context->codec_type = CODEC_TYPE_VIDEO;
else if ( type == "audio" )
codec_context->codec_type = CODEC_TYPE_AUDIO;
else if ( type == "application" )
codec_context->codec_type = CODEC_TYPE_DATA;
#endif
else
Warning("Unknown media_type %s", type.c_str());
#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(codec_context->codec_name, smStaticPayloads[i].payloadName, sizeof(codec_context->codec_name));
#endif
codec_context->codec_type = smStaticPayloads[i].codecType;
codec_context->codec_id = smStaticPayloads[i].codecId;
codec_context->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(codec_context->codec_name, smDynamicPayloads[i].payloadName, sizeof(codec_context->codec_name));
#endif
codec_context->codec_type = smDynamicPayloads[i].codecType;
codec_context->codec_id = smDynamicPayloads[i].codecId;
codec_context->sample_rate = mediaDesc->getClock();
break;
}
}
} /// end if static or dynamic
#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() );
}
if ( mediaDesc->getWidth() )
codec_context->width = mediaDesc->getWidth();
if ( mediaDesc->getHeight() )
codec_context->height = mediaDesc->getHeight();
if ( codec_context->codec_id == AV_CODEC_ID_H264 && mediaDesc->getSprops().size()) {
uint8_t start_sequence[]= { 0, 0, 1 };
codec_context->extradata_size= 0;
codec_context->extradata= nullptr;
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) +
codec_context->extradata_size +
#if LIBAVCODEC_VERSION_CHECK(57, 0, 0, 0, 0)
AV_INPUT_BUFFER_PADDING_SIZE
#else
FF_INPUT_BUFFER_PADDING_SIZE
#endif
);
if ( dest ) {
if ( codec_context->extradata_size ) {
// av_realloc?
memcpy(dest, codec_context->extradata, codec_context->extradata_size);
av_free(codec_context->extradata);
}
memcpy(dest+codec_context->extradata_size, start_sequence, sizeof(start_sequence));
memcpy(dest+codec_context->extradata_size+sizeof(start_sequence), decoded_packet, packet_size);
memset(dest+codec_context->extradata_size+sizeof(start_sequence)+
packet_size, 0,
#if LIBAVCODEC_VERSION_CHECK(57, 0, 0, 0, 0)
AV_INPUT_BUFFER_PADDING_SIZE
#else
FF_INPUT_BUFFER_PADDING_SIZE
#endif
);
codec_context->extradata= dest;
codec_context->extradata_size+= sizeof(start_sequence)+packet_size;
// } else {
// av_log(codec, AV_LOG_ERROR, "Unable to allocate memory for extradata!");
// return AVERROR(ENOMEM);
}
}
}
}
#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
avcodec_parameters_from_context(stream->codecpar, codec_context);
#endif
} // end foreach mediaList
return formatContext;
}
#endif // HAVE_LIBAVFORMAT
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