FskErr latmPacketParserCanHandle(SDPMediaDescription mediaDescription, const char *encodingName)
{
Boolean canHandle = false;
// We handle MP4A-LATM encoding
if (0 != FskStrCompareCaseInsensitive("MP4A-LATM", encodingName)) goto bail;
if (NULL != mediaDescription) {
SDPAttribute attribute;
attribute = SDPFindMediaAttribute(mediaDescription, "fmtp");
if (NULL != attribute) {
char *attr;
// The config string must be present in the SDP (i.e. out of band)
if (NULL != copyAttributeValue(attribute->value, "cpresent", &attr)) {
canHandle = (0 == FskStrToNum(attr));
FskMemPtrDispose(attr);
}
// Validate the configuration
if (canHandle) {
if (NULL != copyAttributeValue(attribute->value, "config", &attr)) {
canHandle = validateConfig(attr, NULL, NULL, NULL, NULL, NULL);
FskMemPtrDispose(attr);
}
else
canHandle = false;
}
}
}
bail:
return canHandle ? 0 : kFskErrRTSPPacketParserUnsupportedFormat;
}
void
XmlUniformiser::copyElementAttributes()
{
do
{
bool hadSpace = isSpace();
skipSpaces();
if ( startsWith( ">" ) )
break;
if ( hadSpace )
m_stripped += ' ';
copyAttributeName();
skipSpaces();
if ( startsWith( "=" ) )
{
copyNext();
copyAttributeValue();
}
else // attribute should always be valued, ne ?
m_stripped += ' ';
}
while ( isValidIndex() );
copyNext();
}
FskErr latmPacketParserNew(RTPPacketParser parser)
{
FskErr err;
LATMPacketParser latmPacketParser;
SDPMediaDescription mediaDescription;
err = FskMemPtrNewClear(sizeof(LATMPacketParserRecord), &latmPacketParser);
BAIL_IF_ERR(err);
parser->handlerRefCon = latmPacketParser;
parser->mediaFormat = kRTPAudioFormatAAC;
latmPacketParser->bitsPerSample = 16;
latmPacketParser->mediaFormat = kRTPAudioFormatAAC;
mediaDescription = parser->mediaDescription;
if (NULL != mediaDescription) {
SDPAttribute attribute;
// Grab what we need from the "fmtp" attribute
attribute = SDPFindMediaAttribute(mediaDescription, "fmtp");
if (NULL != attribute) {
char *value, *attr;
value = FskStrDoCopy(attribute->value);
if (NULL != copyAttributeValue(value, "config", &attr)) {
latmPacketParser->config = FskStrDoCopy(attr);
FskMemPtrDispose(attr);
}
FskMemPtrDispose(value);
}
}
// Build an ESDS compatible with Kinoma Player / FhG decoder
if (!validateConfig(latmPacketParser->config, &latmPacketParser->nChannels, &latmPacketParser->sampleRate, &latmPacketParser->nSubFrames, latmPacketParser->esds, &latmPacketParser->esdsSize)) {
err = kFskErrRTSPPacketParserUnsupportedFormat;
}
bail:
return err;
}
FskErr h263PacketParserNew(RTPPacketParser parser)
{
FskErr err;
H263PacketParser h263PacketParser;
SDPMediaDescription mediaDescription;
SDPAttribute attribute;
err = FskMemPtrNew(sizeof(H263PacketParserRecord), &h263PacketParser);
if (0 != err) goto bail;
parser->handlerRefCon = h263PacketParser;
h263PacketParser->frames = NULL;
h263PacketParser->mediaFormat = kRTPVideoFormatH263;
h263PacketParser->width = 0;
h263PacketParser->height = 0;
h263PacketParser->lastTimeStamp = 0;
// look for the "a=framesize" attribute in the SDP for width and height
// referenced in 3GPP TS 26.234 version 6.3.0 Release 6
if (0 == h263PacketParser->width) {
char *tmp = NULL, *p[3] = {0};
UInt16 nParts;
attribute = SDPFindMediaAttribute(parser->mediaDescription, "framesize");
if (attribute) {
SDPMediaFormat mediaFormat = parser->mediaDescription->formatList->head;
tmp = FskStrDoCopy(attribute->value);
splitToken(tmp, &nParts, ' ', &p[0]);
if ((UInt32)FskStrToNum(p[0]) == mediaFormat->payloadType) {
splitToken(p[1], &nParts, '-', &p[0]);
h263PacketParser->width = FskStrToNum(p[0]);
h263PacketParser->height = FskStrToNum(p[1]);
}
FskMemPtrDispose(tmp);
}
}
// look for the "a=Width" and "a=Height" attributes (TMI server)
// a=Width:integer;176
// a=Height:integer;144
if (0 == h263PacketParser->width) {
char *p[3] = {0};
UInt16 nParts;
attribute = SDPFindMediaAttribute(parser->mediaDescription, "Width");
if (attribute) {
char *value;
value = FskStrDoCopy(attribute->value);
splitToken(value, &nParts, ';', &p[0]);
h263PacketParser->width = FskStrToNum(p[1]);
FskMemPtrDispose(value);
}
}
if (0 == h263PacketParser->height) {
char *p[3] = {0};
UInt16 nParts;
attribute = SDPFindMediaAttribute(parser->mediaDescription, "Height");
if (attribute) {
char *value;
value = FskStrDoCopy(attribute->value);
splitToken(value, &nParts, ';', &p[0]);
h263PacketParser->height = FskStrToNum(p[1]);
FskMemPtrDispose(value);
}
}
// Next try the cliprect attribute
if (0 == h263PacketParser->width) {
attribute = SDPFindMediaAttribute(parser->mediaDescription, "cliprect");
if (NULL != attribute) {
char *value, *parts[5];
UInt16 nParts;
value = FskStrDoCopy(attribute->value);
splitToken(value, &nParts, ',', &parts[0]);
if (4 == nParts) {
h263PacketParser->width = FskStrToNum(parts[3]);
h263PacketParser->height = FskStrToNum(parts[2]);
}
FskMemPtrDispose(value);
}
}
// Next try the framesize in the fmtp attribute
if (0 == h263PacketParser->width) {
attribute = SDPFindMediaAttribute(parser->mediaDescription, "fmtp");
if (NULL != attribute) {
char *attr;
if (NULL != copyAttributeValue(attribute->value, "framesize", &attr)) {
char *value, *parts[5];
UInt16 nParts;
value = FskStrDoCopy(attr);
splitToken(value, &nParts, '-', &parts[0]);
if (2 == nParts) {
h263PacketParser->width = FskStrToNum(parts[0]);
h263PacketParser->height = FskStrToNum(parts[1]);
}
FskMemPtrDispose(attr);
FskMemPtrDispose(value);
}
}
}
// Grab the timescale - should always be 90000
h263PacketParser->timeScale = 90000;
mediaDescription = parser->mediaDescription;
if (NULL != mediaDescription) {
SDPAttribute attribute;
attribute = SDPFindMediaAttribute(mediaDescription, "rtpmap");
if (NULL != attribute) {
char *value, *parts[4];
UInt16 nParts = 2;
value = FskStrDoCopy(attribute->value);
splitToken(value, &nParts, '/', &parts[0]);
h263PacketParser->timeScale = FskStrToNum(parts[1]);
FskMemPtrDispose(value);
}
}
bail:
return err;
}
