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 "camera_frame_stream.h"
#include <unistd.h>
#include <cassert>
#include <string.h>
#include <signal.h>
#include <libyuv.h>
#include "messaging.hpp"
#include "common/util.h"
#include "common/timing.h"
#include "common/swaglog.h"
#include "buffering.h"
extern "C" {
#include <libavcodec/avcodec.h>
}
extern volatile sig_atomic_t do_exit;
#define FRAME_WIDTH 1164
#define FRAME_HEIGHT 874
namespace {
void camera_open(CameraState *s, VisionBuf *camera_bufs, bool rear) {
assert(camera_bufs);
s->camera_bufs = camera_bufs;
}
void camera_close(CameraState *s) {
tbuffer_stop(&s->camera_tb);
}
void camera_release_buffer(void *cookie, int buf_idx) {
CameraState *s = static_cast<CameraState *>(cookie);
}
void camera_init(CameraState *s, int camera_id, unsigned int fps) {
assert(camera_id < ARRAYSIZE(cameras_supported));
s->ci = cameras_supported[camera_id];
assert(s->ci.frame_width != 0);
s->frame_size = s->ci.frame_height * s->ci.frame_stride;
s->fps = fps;
tbuffer_init2(&s->camera_tb, FRAME_BUF_COUNT, "frame", camera_release_buffer, s);
}
void run_frame_stream(DualCameraState *s) {
int err;
SubMaster sm({"frame"});
CameraState *const rear_camera = &s->rear;
auto *tb = &rear_camera->camera_tb;
while (!do_exit) {
if (sm.update(1000) == 0) continue;
auto frame = sm["frame"].getFrame();
const int buf_idx = tbuffer_select(tb);
rear_camera->camera_bufs_metadata[buf_idx] = {
.frame_id = frame.getFrameId(),
.timestamp_eof = frame.getTimestampEof(),
.frame_length = static_cast<unsigned>(frame.getFrameLength()),
.integ_lines = static_cast<unsigned>(frame.getIntegLines()),
.global_gain = static_cast<unsigned>(frame.getGlobalGain()),
};
cl_command_queue q = rear_camera->camera_bufs[buf_idx].copy_q;
cl_mem yuv_cl = rear_camera->camera_bufs[buf_idx].buf_cl;
clEnqueueWriteBuffer(q, yuv_cl, CL_TRUE, 0, frame.getImage().size(), frame.getImage().begin(), 0, NULL, NULL);
tbuffer_dispatch(tb, buf_idx);
}
}
} // namespace
CameraInfo cameras_supported[CAMERA_ID_MAX] = {
[CAMERA_ID_IMX298] = {
.frame_width = FRAME_WIDTH,
.frame_height = FRAME_HEIGHT,
.frame_stride = FRAME_WIDTH*3,
.bayer = false,
.bayer_flip = false,
},
[CAMERA_ID_OV8865] = {
.frame_width = 1632,
.frame_height = 1224,
.frame_stride = 2040, // seems right
.bayer = true,
.bayer_flip = 3,
.hdr = false
},
};
void cameras_init(DualCameraState *s) {
memset(s, 0, sizeof(*s));
camera_init(&s->rear, CAMERA_ID_IMX298, 20);
s->rear.transform = (mat3){{
1.0, 0.0, 0.0,
0.0, 1.0, 0.0,
0.0, 0.0, 1.0,
}};
camera_init(&s->front, CAMERA_ID_OV8865, 10);
s->front.transform = (mat3){{
1.0, 0.0, 0.0,
0.0, 1.0, 0.0,
0.0, 0.0, 1.0,
}};
}
void camera_autoexposure(CameraState *s, float grey_frac) {}
void cameras_open(DualCameraState *s, VisionBuf *camera_bufs_rear,
VisionBuf *camera_bufs_focus, VisionBuf *camera_bufs_stats,
VisionBuf *camera_bufs_front) {
assert(camera_bufs_rear);
assert(camera_bufs_front);
int err;
// LOG("*** open front ***");
camera_open(&s->front, camera_bufs_front, false);
// LOG("*** open rear ***");
camera_open(&s->rear, camera_bufs_rear, true);
}
void cameras_close(DualCameraState *s) {
camera_close(&s->rear);
}
void cameras_run(DualCameraState *s) {
set_thread_name("frame_streaming");
run_frame_stream(s);
cameras_close(s);
}