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#!/usr/bin/python3
import sys
import selectors
import pykms
import argparse
import time
parser = argparse.ArgumentParser()
parser.add_argument("width", type=int)
parser.add_argument("height", type=int)
parser.add_argument("fourcc", type=str, nargs="?", default="YUVY")
args = parser.parse_args()
w = args.width
h = args.height
fmt = pykms.fourcc_to_pixelformat(args.fourcc)
print("Capturing in {}x{}".format(w, h))
card = pykms.Card()
res = pykms.ResourceManager(card)
conn = res.reserve_connector()
crtc = res.reserve_crtc(conn)
plane = res.reserve_overlay_plane(crtc, fmt)
mode = conn.get_default_mode()
modeb = mode.to_blob(card)
req = pykms.AtomicReq(card)
req.add(conn, "CRTC_ID", crtc.id)
req.add(crtc, {"ACTIVE": 1,
"MODE_ID": modeb.id})
req.commit_sync(allow_modeset = True)
NUM_BUFS = 5
fbs = []
for i in range(NUM_BUFS):
fb = pykms.DumbFramebuffer(card, w, h, fmt)
fbs.append(fb)
vidpath = pykms.VideoDevice.get_capture_devices()[0]
vid = pykms.VideoDevice(vidpath)
cap = vid.capture_streamer
cap.set_port(0)
cap.set_format(fmt, w, h)
cap.set_queue_size(NUM_BUFS)
for fb in fbs:
cap.queue(fb)
cap.stream_on()
def readvid(conn, mask):
fb = cap.dequeue()
if card.has_atomic:
plane.set_props({
"FB_ID": fb.id,
"CRTC_ID": crtc.id,
"SRC_W": fb.width << 16,
"SRC_H": fb.height << 16,
"CRTC_W": fb.width,
"CRTC_H": fb.height,
})
else:
crtc.set_plane(plane, fb, 0, 0, fb.width, fb.height,
0, 0, fb.width, fb.height)
cap.queue(fb)
def readkey(conn, mask):
#print("KEY EVENT");
sys.stdin.readline()
exit(0)
sel = selectors.DefaultSelector()
sel.register(cap.fd, selectors.EVENT_READ, readvid)
sel.register(sys.stdin, selectors.EVENT_READ, readkey)
while True:
events = sel.select()
for key, mask in events:
callback = key.data
callback(key.fileobj, mask)
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