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 <cassert>
#include "selfdrive/loggerd/encoder/encoder.h"
VideoEncoder::~VideoEncoder() {}
void VideoEncoder::publisher_init() {
// publish
service_name = this->type == DriverCam ? "driverEncodeData" :
(this->type == WideRoadCam ? "wideRoadEncodeData" :
(this->in_width == this->out_width ? "roadEncodeData" : "qRoadEncodeData"));
pm.reset(new PubMaster({service_name}));
}
void VideoEncoder::publisher_publish(VideoEncoder *e, int segment_num, uint32_t idx, VisionIpcBufExtra &extra,
unsigned int flags, kj::ArrayPtr<capnp::byte> header, kj::ArrayPtr<capnp::byte> dat) {
// broadcast packet
MessageBuilder msg;
auto event = msg.initEvent(true);
auto edat = (e->type == DriverCam) ? event.initDriverEncodeData() :
((e->type == WideRoadCam) ? event.initWideRoadEncodeData() :
(e->in_width == e->out_width ? event.initRoadEncodeData() : event.initQRoadEncodeData()));
auto edata = edat.initIdx();
edata.setFrameId(extra.frame_id);
edata.setTimestampSof(extra.timestamp_sof);
edata.setTimestampEof(extra.timestamp_eof);
edata.setType(e->codec);
edata.setEncodeId(idx);
edata.setSegmentNum(segment_num);
edata.setSegmentId(idx);
edata.setFlags(flags);
edata.setLen(dat.size());
edat.setData(dat);
if (flags & V4L2_BUF_FLAG_KEYFRAME) edat.setHeader(header);
auto words = new kj::Array<capnp::word>(capnp::messageToFlatArray(msg));
auto bytes = words->asBytes();
e->pm->send(e->service_name, bytes.begin(), bytes.size());
if (e->write) {
e->to_write.push(words);
} else {
delete words;
}
}
// TODO: writing should be moved to loggerd
void VideoEncoder::write_handler(VideoEncoder *e, const char *path) {
VideoWriter writer(path, e->filename, e->codec != cereal::EncodeIndex::Type::FULL_H_E_V_C, e->out_width, e->out_height, e->fps, e->codec);
bool first = true;
kj::Array<capnp::word>* out_buf;
while ((out_buf = e->to_write.pop())) {
capnp::FlatArrayMessageReader cmsg(*out_buf);
cereal::Event::Reader event = cmsg.getRoot<cereal::Event>();
auto edata = (e->type == DriverCam) ? event.getDriverEncodeData() :
((e->type == WideRoadCam) ? event.getWideRoadEncodeData() :
(e->in_width == e->out_width ? event.getRoadEncodeData() : event.getQRoadEncodeData()));
auto idx = edata.getIdx();
auto flags = idx.getFlags();
if (first) {
assert(flags & V4L2_BUF_FLAG_KEYFRAME);
auto header = edata.getHeader();
writer.write((uint8_t *)header.begin(), header.size(), idx.getTimestampEof()/1000, true, false);
first = false;
}
// dangerous cast from const, but should be fine
auto data = edata.getData();
if (data.size() > 0) {
writer.write((uint8_t *)data.begin(), data.size(), idx.getTimestampEof()/1000, false, flags & V4L2_BUF_FLAG_KEYFRAME);
}
// free the data
delete out_buf;
}
// VideoWriter is freed on out of scope
}