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https://github.com/KrisKennaway/ii-vision.git
synced 2024-06-09 06:29:32 +00:00
Extract out input video decoding into separate module.
Prototype a threaded version of the decoder but this doesn't seem to be necessary as it's not the bottleneck. Opcode stream is now aware of frame cycle budget and will keep emitting until budget runs out -- so no need for fullness estimate.
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kris
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34
frame_sequence.py
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34
frame_sequence.py
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from typing import Iterable
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import threading
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import queue
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import numpy
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import skvideo.io
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def frame_sequence(filename: str) -> Iterable[numpy.ndarray]:
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yield from skvideo.io.vreader(filename)
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# Version of the above that delegates decoding to a background thread; not
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# clear that it's more efficient though
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def frame_sequence2(filename: str) -> Iterable[numpy.ndarray]:
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q = queue.Queue()
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def worker():
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for f in skvideo.io.vreader(filename):
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q.put(f)
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q.put(None)
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t = threading.Thread(target=worker)
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t.start()
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while True:
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frame = q.get()
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if frame is None:
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break
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yield frame
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q.task_done()
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t.join()
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168
main.py
168
main.py
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@ -1,135 +1,31 @@
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import skvideo.io
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import skvideo.datasets
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from PIL import Image
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import numpy as np
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import frame_sequence
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import opcodes
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import screen
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import video
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CYCLES = 1024 * 1024
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MAX_OUT = 20 * 1024
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MAX_OUT = 1 * 1024 * 1024
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VIDEO_FPS = 30
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APPLE_FPS = 10
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# Old naive XOR algorithm:
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#
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# stores=1894, content changes=15, page changes=365
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# Frame 0, 2654 bytes, similarity = 0.850856
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# stores=1750, content changes=19, page changes=444
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# Frame 3, 2676 bytes, similarity = 0.903088
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# stores=1648, content changes=20, page changes=501
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# Frame 6, 2690 bytes, similarity = 0.922024
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# stores=1677, content changes=18, page changes=486
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# Frame 9, 2685 bytes, similarity = 0.912723
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# stores=1659, content changes=18, page changes=497
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# Frame 12, 2689 bytes, similarity = 0.923438
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# stores=1681, content changes=17, page changes=485
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# Frame 15, 2685 bytes, similarity = 0.922656
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# stores=1686, content changes=17, page changes=482
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# Frame 18, 2684 bytes, similarity = 0.921912
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# stores=1669, content changes=17, page changes=492
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# New
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# stores=2260, content changes=277, page changes=125
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# Frame 0, 3064 bytes, similarity = 0.874740
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# stores=2162, content changes=325, page changes=131
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# Frame 3, 3074 bytes, similarity = 0.925670
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# stores=2241, content changes=313, page changes=102
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# Frame 6, 3071 bytes, similarity = 0.936942
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# stores=2265, content changes=313, page changes=90
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# Frame 9, 3071 bytes, similarity = 0.931882
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# stores=2225, content changes=334, page changes=91
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# Frame 12, 3075 bytes, similarity = 0.929427
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# stores=2216, content changes=342, page changes=89
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# Frame 15, 3078 bytes, similarity = 0.919978
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# stores=2222, content changes=339, page changes=88
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# Optimized new
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# Fullness = 1.384560, cycle_counter = 90738/104857 budget
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# stores=1872, content changes=15, page changes=352
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# Frame 0, 2606 bytes, similarity = 0.849219
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# Fullness = 1.452588, cycle_counter = 110009/104857 budget
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# stores=2163, content changes=28, page changes=472
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# Frame 3, 3163 bytes, similarity = 0.924256
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# Fullness = 1.577072, cycle_counter = 113843/104857 budget
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# stores=2062, content changes=30, page changes=577
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# Frame 6, 3276 bytes, similarity = 0.939918
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# Fullness = 1.597466, cycle_counter = 106213/104857 budget
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# stores=1899, content changes=29, page changes=550
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# Frame 9, 3057 bytes, similarity = 0.928274
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# Fullness = 1.615001, cycle_counter = 106008/104857 budget
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# stores=1875, content changes=27, page changes=561
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# Frame 12, 3051 bytes, similarity = 0.933854
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# Fullness = 1.639691, cycle_counter = 106460/104857 budget
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# stores=1855, content changes=30, page changes=575
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# Frame 15, 3065 bytes, similarity = 0.929725
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# Fullness = 1.635406, cycle_counter = 104583/104857 budget
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# stores=1827, content changes=30, page changes=562
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# TSP solver
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# Fullness = 1.336189, cycle_counter = 87568/104857 budget
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# stores=1872, content changes=320, page changes=32
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# Frame 0, 2576 bytes, similarity = 0.849219
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# Fullness = 1.386065, cycle_counter = 108771/104857 budget
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# stores=2242, content changes=452, page changes=33
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# Frame 3, 3212 bytes, similarity = 0.927604
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# Fullness = 1.482284, cycle_counter = 112136/104857 budget
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# stores=2161, content changes=552, page changes=33
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# Frame 6, 3331 bytes, similarity = 0.943415
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# Fullness = 1.501014, cycle_counter = 106182/104857 budget
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# stores=2021, content changes=535, page changes=33
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# Frame 9, 3157 bytes, similarity = 0.934263
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# Fullness = 1.523818, cycle_counter = 106450/104857 budget
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# stores=1995, content changes=554, page changes=33
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# Frame 12, 3169 bytes, similarity = 0.939844
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# Fullness = 1.543029, cycle_counter = 106179/104857 budget
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# stores=1966, content changes=566, page changes=33
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# Frame 15, 3164 bytes, similarity = 0.935231
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# Fullness = 1.538659, cycle_counter = 104560/104857 budget
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# stores=1941, content changes=554, page changes=33
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# page first
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# Fullness = 1.366463, cycle_counter = 89552/104857 budget
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# stores=1872, content changes=352, page changes=32
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# Frame 0, 2640 bytes, similarity = 0.849219
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# Fullness = 1.413155, cycle_counter = 108440/104857 budget
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# stores=2192, content changes=476, page changes=32
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# Frame 3, 3208 bytes, similarity = 0.925744
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# Fullness = 1.516888, cycle_counter = 112554/104857 budget
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# stores=2120, content changes=583, page changes=32
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# Frame 6, 3350 bytes, similarity = 0.942187
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# Fullness = 1.535086, cycle_counter = 106115/104857 budget
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# stores=1975, content changes=561, page changes=32
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# Frame 9, 3161 bytes, similarity = 0.932106
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# Fullness = 1.553913, cycle_counter = 106143/104857 budget
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# stores=1951, content changes=575, page changes=32
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# Frame 12, 3165 bytes, similarity = 0.937835
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# Fullness = 1.571548, cycle_counter = 106047/104857 budget
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# stores=1927, content changes=587, page changes=32
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# Frame 15, 3165 bytes, similarity = 0.933259
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# Fullness = 1.572792, cycle_counter = 104940/104857 budget
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# stores=1906, content changes=581, page changes=32
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def main():
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s = video.Video()
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frames = frame_sequence.frame_sequence(
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"Computer Chronicles - 06x05 - The Apple II.mp4")
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bytes_out = 0
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s = video.Video(APPLE_FPS)
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screen_cls = screen.HGR140Bitmap
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# Assert that the opcode stream reconstructs the same screen
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ds = video.Video()
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decoder = opcodes.Decoder(s.state)
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videogen = skvideo.io.vreader("CoffeeCup-H264-75.mov")
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with open("out.bin", "wb") as out:
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bytes_out = 0
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# Estimated opcode overhead, i.e. ratio of extra cycle_counter from
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# opcodes
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fullness = 1.6
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screen_cls = screen.HGRBitmap
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# Assert that the opcode stream reconstructs the same screen
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ds = video.Video()
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decoder = opcodes.Decoder(ds.state)
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for idx, frame in enumerate(videogen):
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for idx, frame in enumerate(frames):
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if idx % (VIDEO_FPS // APPLE_FPS):
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continue
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@ -141,50 +37,34 @@ def main():
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f = screen_cls(im)
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cycle_budget = int(CYCLES / APPLE_FPS)
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stream = bytes(s.update(f, cycle_budget, fullness))
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#print(" ".join("%02x(%02d)" % (b, b) for b in stream))
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fullness *= s.cycle_counter.cycles / cycle_budget
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print("Fullness = %f, cycle_counter = %d/%d budget" % (
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fullness, s.cycle_counter.cycles, cycle_budget))
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(num_content_stores, num_content_changes,
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num_page_changes, num_rle_bytes) = decoder.decode_stream(
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iter(stream))
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assert np.array_equal(ds.screen.bytemap, s.screen.bytemap), (
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ds.screen.bytemap ^ s.screen.bytemap)
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print("stores=%d, content changes=%d, page changes=%d, "
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"rle_bytes=%d" % (
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num_content_stores, num_content_changes,
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num_page_changes, num_rle_bytes))
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stream = bytes(s.emit_stream(s.encode_frame(f)))
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# assert that the screen decodes to the original bitmap
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bm = screen_cls.from_bytemap(s.screen).bitmap
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# print(np.array(im)[0:5,0:5])
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# print(bm[0:5,0:5])
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# print("Comparing bitmaps")
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# print(np.array(im))
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# print(bm)
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# print(s.screen)
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# assert np.array_equal(bm, im), np.ma.masked_array(
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#np.set_printoptions(threshold=100000000)
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#assert np.array_equal(bm, im), np.ma.masked_array(
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# bm, np.logical_not(np.logical_xor(bm, im)))
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# d = Image.fromarray(s.screen)
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# d.show()
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bytes_out += len(stream)
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if bytes_out > MAX_OUT:
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break
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bytes_left = MAX_OUT - bytes_out
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print("Frame %d, %d bytes, similarity = %f" % (
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idx, len(stream), screen.bitmap_similarity(im, bm)))
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out.write(stream)
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out.write(stream[:bytes_left])
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if bytes_left <= 0:
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out.write(bytes(s.done()))
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break
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out.write(bytes(s.done()))
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if __name__ == "__main__":
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