openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.
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#include "tools/replay/logreader.h"
#include <algorithm>
#include "tools/replay/util.h"
Event::Event(const kj::ArrayPtr<const capnp::word> &amsg, bool frame) : reader(amsg), frame(frame) {
words = kj::ArrayPtr<const capnp::word>(amsg.begin(), reader.getEnd());
event = reader.getRoot<cereal::Event>();
which = event.which();
mono_time = event.getLogMonoTime();
// 1) Send video data at t=timestampEof/timestampSof
// 2) Send encodeIndex packet at t=logMonoTime
if (frame) {
auto idx = capnp::AnyStruct::Reader(event).getPointerSection()[0].getAs<cereal::EncodeIndex>();
// C2 only has eof set, and some older routes have neither
uint64_t sof = idx.getTimestampSof();
uint64_t eof = idx.getTimestampEof();
if (sof > 0) {
mono_time = sof;
} else if (eof > 0) {
mono_time = eof;
}
}
}
// class LogReader
LogReader::LogReader(size_t memory_pool_block_size) {
#ifdef HAS_MEMORY_RESOURCE
const size_t buf_size = sizeof(Event) * memory_pool_block_size;
pool_buffer_ = ::operator new(buf_size);
mbr_ = new std::pmr::monotonic_buffer_resource(pool_buffer_, buf_size);
#endif
events.reserve(memory_pool_block_size);
}
LogReader::~LogReader() {
for (Event *e : events) {
delete e;
}
#ifdef HAS_MEMORY_RESOURCE
delete mbr_;
::operator delete(pool_buffer_);
#endif
}
bool LogReader::load(const std::string &url, std::atomic<bool> *abort, bool local_cache, int chunk_size, int retries) {
FileReader f(local_cache, chunk_size, retries);
std::string data = f.read(url, abort);
if (data.empty()) return false;
return load((std::byte*)data.data(), data.size(), abort);
}
bool LogReader::load(const std::byte *data, size_t size, std::atomic<bool> *abort) {
raw_ = decompressBZ2(data, size, abort);
if (raw_.empty()) {
if (!(abort && *abort)) {
rWarning("failed to decompress log");
}
return false;
}
try {
kj::ArrayPtr<const capnp::word> words((const capnp::word *)raw_.data(), raw_.size() / sizeof(capnp::word));
while (words.size() > 0 && !(abort && *abort)) {
#ifdef HAS_MEMORY_RESOURCE
Event *evt = new (mbr_) Event(words);
#else
Event *evt = new Event(words);
#endif
// Add encodeIdx packet again as a frame packet for the video stream
if (evt->which == cereal::Event::ROAD_ENCODE_IDX ||
evt->which == cereal::Event::DRIVER_ENCODE_IDX ||
evt->which == cereal::Event::WIDE_ROAD_ENCODE_IDX) {
#ifdef HAS_MEMORY_RESOURCE
Event *frame_evt = new (mbr_) Event(words, true);
#else
Event *frame_evt = new Event(words, true);
#endif
events.push_back(frame_evt);
}
words = kj::arrayPtr(evt->reader.getEnd(), words.end());
events.push_back(evt);
}
} catch (const kj::Exception &e) {
rWarning("failed to parse log : %s", e.getDescription().cStr());
if (!events.empty()) {
rWarning("read %zu events from corrupt log", events.size());
}
}
if (!events.empty() && !(abort && *abort)) {
std::sort(events.begin(), events.end(), Event::lessThan());
return true;
}
return false;
}