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Added several DTSC packet convenience functions

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Ramoe 2017-03-31 17:32:35 +02:00 • committed by Thulinma
parent 4442b330e8
commit 45022f36c9
2 changed files with 70 additions and 0 deletions
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65
lib/dtscmeta.cpp
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@ -270,6 +270,71 @@ namespace DTSC {
memcpy(data+offset+11+packDataSize, "\000\000\356", 3);
}
///clear the keyframe byte.
void Packet::clearKeyFrame(){
uint32_t offset = 23;
while (data[offset] != 'd' && data[offset] != 'k'){
switch (data[offset]){
case 'o': offset += 17; break;
case 'b': offset += 15; break;
default:
FAIL_MSG("Errrrrrr");
}
}
if(data[offset] == 'k'){
data[offset] = 'K';
data[offset+16] = 0;
}
}
void Packet::appendData(const char * appendData, uint32_t appendLen){
resize(dataLen + appendLen);
memcpy(data + dataLen-3, appendData, appendLen);
memcpy(data + dataLen-3 + appendLen, "\000\000\356", 3); //end container
dataLen += appendLen;
Bit::htobl(data+4, Bit::btohl(data +4)+appendLen);
uint32_t offset = getDataStringLenOffset();
Bit::htobl(data+offset, Bit::btohl(data+offset)+appendLen);
}
void Packet::appendNal(const char * appendData, uint32_t appendLen, uint32_t totalLen){
if(totalLen ==0){
return;
}
// INFO_MSG("totallen: %d, appendLen: %d",totalLen,appendLen);
resize(dataLen + appendLen +4);
Bit::htobl(data+dataLen -3, totalLen);
memcpy(data + dataLen-3+4, appendData, appendLen);
memcpy(data + dataLen-3+4 + appendLen, "\000\000\356", 3); //end container
dataLen += appendLen +4;
Bit::htobl(data+4, Bit::btohl(data +4)+appendLen+4);
uint32_t offset = getDataStringLenOffset();
Bit::htobl(data+offset, Bit::btohl(data+offset)+appendLen+4);
}
uint32_t Packet::getDataStringLen(){
return Bit::btohl(data+getDataStringLenOffset());
}
///Method can only be used when using internal functions to build the data.
uint32_t Packet::getDataStringLenOffset(){
uint32_t offset = 23;
while (data[offset] != 'd'){
switch (data[offset]){
case 'o': offset += 17; break;
case 'b': offset += 15; break;
case 'k': offset += 19; break;
default:
FAIL_MSG("Errrrrrr");
return -1;
}
}
return offset +5;
}
/// Helper function for skipping over whole DTSC parts
static char * skipDTSC(char * p, char * max) {
if (p + 1 >= max || p[0] == 0x00) {