nsresult
VorbisState::PageIn(ogg_page* aPage)
{
if (!mActive)
return NS_OK;
NS_ASSERTION(static_cast<uint32_t>(ogg_page_serialno(aPage)) == mSerial,
"Page must be for this stream!");
if (ogg_stream_pagein(&mState, aPage) == -1)
return NS_ERROR_FAILURE;
bool foundGp;
nsresult res = PacketOutUntilGranulepos(foundGp);
if (NS_FAILED(res))
return res;
if (foundGp && mDoneReadingHeaders) {
// We've found a packet with a granulepos, and we've loaded our metadata
// and initialized our decoder. Determine granulepos of buffered packets.
ReconstructVorbisGranulepos();
for (uint32_t i = 0; i < mUnstamped.Length(); ++i) {
ogg_packet* packet = mUnstamped[i];
AssertHasRecordedPacketSamples(packet);
NS_ASSERTION(!IsHeader(packet), "Don't try to recover header packet gp");
NS_ASSERTION(packet->granulepos != -1, "Packet must have gp by now");
mPackets.Append(packet);
}
mUnstamped.Clear();
}
return NS_OK;
}
nsresult OggCodecState::PacketOutUntilGranulepos(bool& aFoundGranulepos) {
int r;
aFoundGranulepos = false;
// Extract packets from the sync state until either no more packets
// come out, or we get a data packet with non -1 granulepos.
do {
ogg_packet packet;
r = ogg_stream_packetout(&mState, &packet);
if (r == 1) {
ogg_packet* clone = Clone(&packet);
if (IsHeader(&packet)) {
// Header packets go straight into the packet queue.
mPackets.Append(clone);
} else {
// We buffer data packets until we encounter a granulepos. We'll
// then use the granulepos to figure out the granulepos of the
// preceeding packets.
mUnstamped.AppendElement(clone);
aFoundGranulepos = packet.granulepos > 0;
}
}
} while (r != 0 && !aFoundGranulepos);
if (ogg_stream_check(&mState)) {
NS_WARNING("Unrecoverable error in ogg_stream_packetout");
return NS_ERROR_FAILURE;
}
return NS_OK;
}
/*
* Parses autopilot info message (page 0)
*/
bool tCanKingProtocol::AutopilotInfo( const quint8* pData, quint8& mode, quint8& autopilotRespLevel, quint8& stationKeepRespLevel, quint8& standbyRespLevel )
{
if( IsHeader( pData ) )
{
mode = pData[ 1 ];
autopilotRespLevel = pData[ 2 ];
stationKeepRespLevel = pData[ 3 ];
standbyRespLevel = pData[ 4 ];
return true;
}
return false;
}
// ---------------------------------------------------------
// CMailToHandler::FieldStart()
// ---------------------------------------------------------
//
TInt CMailToHandler::FieldStart(const TDesC& aHeader)
{
CLOG_ENTERFN( "CMailToHandler::FieldStart()" );
TPtrC path = iParsedUrl->Des();
TInt retVal = path.Length();
/* find the starting position of the specific filed */
if( IsHeader( aHeader ) )
{
retVal = path.FindF( aHeader ) + aHeader.Length();
}
CLOG_LEAVEFN( "CMailToHandler::FieldStart()" );
return retVal;
}
// ---------------------------------------------------------
// CMailToHandler::FieldEnd()
// ---------------------------------------------------------
//
TInt CMailToHandler::FieldEnd(const TDesC& aHeader)
{
CLOG_ENTERFN( "CMailToHandler::FieldEnd()" );
TPtrC path = iParsedUrl->Des();
TInt length = path.Length(); // length of the scheme
TInt retVal = length;
TInt startPos = FieldStart( aHeader );
if( IsHeader( aHeader ) )
{
TInt temp = GetNextField( startPos );
/* we need to subtract 1 if the result is
not equal to length because of the & or ? */
retVal = ( temp == length ) ? length : ( temp - 1);
}
CLOG_LEAVEFN( "CMailToHandler::FieldEnd()" );
return retVal;
}
nsresult OpusState::PageIn(ogg_page* aPage)
{
if (!mActive)
return NS_OK;
NS_ASSERTION(static_cast<uint32_t>(ogg_page_serialno(aPage)) == mSerial,
"Page must be for this stream!");
if (ogg_stream_pagein(&mState, aPage) == -1)
return NS_ERROR_FAILURE;
bool haveGranulepos;
nsresult rv = PacketOutUntilGranulepos(haveGranulepos);
if (NS_FAILED(rv) || !haveGranulepos || mPacketCount < 2)
return rv;
if(!ReconstructOpusGranulepos())
return NS_ERROR_FAILURE;
for (uint32_t i = 0; i < mUnstamped.Length(); i++) {
ogg_packet* packet = mUnstamped[i];
NS_ASSERTION(!IsHeader(packet), "Don't try to play a header packet");
NS_ASSERTION(packet->granulepos != -1, "Packet should have a granulepos");
mPackets.Append(packet);
}
mUnstamped.Clear();
return NS_OK;
}
bool c4_FileMark::IsOldHeader()const {
return IsHeader() && _data[3] == 0x80;
}
bool BlockMergePass::MergeBlocks(Function* func) {
bool modified = false;
for (auto bi = func->begin(); bi != func->end();) {
// Find block with single successor which has no other predecessors.
auto ii = bi->end();
--ii;
Instruction* br = &*ii;
if (br->opcode() != SpvOpBranch) {
++bi;
continue;
}
const uint32_t lab_id = br->GetSingleWordInOperand(0);
if (cfg()->preds(lab_id).size() != 1) {
++bi;
continue;
}
bool pred_is_merge = IsMerge(&*bi);
bool succ_is_merge = IsMerge(lab_id);
if (pred_is_merge && succ_is_merge) {
// Cannot merge two merges together.
++bi;
continue;
}
Instruction* merge_inst = bi->GetMergeInst();
bool pred_is_header = IsHeader(&*bi);
if (pred_is_header && lab_id != merge_inst->GetSingleWordInOperand(0u)) {
bool succ_is_header = IsHeader(lab_id);
if (pred_is_header && succ_is_header) {
// Cannot merge two headers together when the successor is not the merge
// block of the predecessor.
++bi;
continue;
}
// If this is a header block and the successor is not its merge, we must
// be careful about which blocks we are willing to merge together.
// OpLoopMerge must be followed by a conditional or unconditional branch.
// The merge must be a loop merge because a selection merge cannot be
// followed by an unconditional branch.
BasicBlock* succ_block = context()->get_instr_block(lab_id);
SpvOp succ_term_op = succ_block->terminator()->opcode();
assert(merge_inst->opcode() == SpvOpLoopMerge);
if (succ_term_op != SpvOpBranch &&
succ_term_op != SpvOpBranchConditional) {
++bi;
continue;
}
}
// Merge blocks.
context()->KillInst(br);
auto sbi = bi;
for (; sbi != func->end(); ++sbi)
if (sbi->id() == lab_id) break;
// If bi is sbi's only predecessor, it dominates sbi and thus
// sbi must follow bi in func's ordering.
assert(sbi != func->end());
// Update the inst-to-block mapping for the instructions in sbi.
for (auto& inst : *sbi) {
context()->set_instr_block(&inst, &*bi);
}
// Now actually move the instructions.
bi->AddInstructions(&*sbi);
if (merge_inst) {
if (pred_is_header && lab_id == merge_inst->GetSingleWordInOperand(0u)) {
// Merging the header and merge blocks, so remove the structured control
// flow declaration.
context()->KillInst(merge_inst);
} else {
// Move the merge instruction to just before the terminator.
merge_inst->InsertBefore(bi->terminator());
}
}
context()->ReplaceAllUsesWith(lab_id, bi->id());
context()->KillInst(sbi->GetLabelInst());
(void)sbi.Erase();
// Reprocess block.
modified = true;
}
return modified;
}
bool BlockMergePass::IsHeader(uint32_t id) {
return IsHeader(context()->get_instr_block(get_def_use_mgr()->GetDef(id)));
}
