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 "system/loggerd/encoder/encoder.h"
VideoEncoder::VideoEncoder(const EncoderInfo &encoder_info, int in_width, int in_height)
: encoder_info(encoder_info), in_width(in_width), in_height(in_height) {
pm.reset(new PubMaster({encoder_info.publish_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 = (event.*(e->encoder_info.init_encode_data_func))();
auto edata = edat.initIdx();
struct timespec ts;
timespec_get(&ts, TIME_UTC);
edat.setUnixTimestampNanos((uint64_t)ts.tv_sec*1000000000 + ts.tv_nsec);
edata.setFrameId(extra.frame_id);
edata.setTimestampSof(extra.timestamp_sof);
edata.setTimestampEof(extra.timestamp_eof);
edata.setType(e->encoder_info.encode_type);
edata.setEncodeId(e->cnt++);
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->encoder_info.publish_name, bytes.begin(), bytes.size());
delete words;
}