forked from Mirrors/wasm3
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7b1a9756b3
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7664a7e232
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#!/usr/bin/env python3
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import os, struct, time
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import multiprocessing as mp
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import wasm3
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import numpy
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os.environ['PYGAME_HIDE_SUPPORT_PROMPT'] = "true"
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def consumer(conn):
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import pygame
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pygame.mixer.pre_init(frequency=44100, size=-16, channels=2)
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pygame.init()
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channel = pygame.mixer.Channel(0)
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while True:
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chunk = pygame.mixer.Sound(buffer=conn.recv())
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indicator = '|' if channel.get_queue() else '.'
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print(indicator, end='', flush=True)
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while channel.get_queue() != None:
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time.sleep(0.01)
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channel.queue(chunk)
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pygame.quit()
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if __name__ == '__main__':
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print("Hondarribia - Intro song WebAssembly Summit 2020 by Peter Salomonsen")
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print("Source: https://petersalomonsen.com/webassemblymusic/livecodev2/?gist=5b795090ead4f192e7f5ee5dcdd17392")
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print("Synthesized: https://soundcloud.com/psalomo/hondarribia")
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conn, child_conn = mp.Pipe()
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p = mp.Process(target=consumer, args=(child_conn,))
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p.start()
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scriptpath = os.path.dirname(os.path.realpath(__file__))
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wasm_fn = os.path.join(scriptpath, "./wasm/hondarribia.wasm")
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# Prepare Wasm3 engine
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env = wasm3.Environment()
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rt = env.new_runtime(1024)
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with open(wasm_fn, "rb") as f:
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mod = env.parse_module(f.read())
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rt.load(mod)
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buff = b''
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buff_sz = 256
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print("Pre-buffering...")
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def fd_write(fd, wasi_iovs, iows_len, nwritten):
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global buff, buff_sz
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mem = rt.get_memory(0)
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# decode
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(off, size) = struct.unpack("<II", mem[wasi_iovs:wasi_iovs+8])
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arr = numpy.frombuffer(mem[off:off+size], dtype=numpy.float32) * 32768
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buff += arr.astype(numpy.int16).tobytes()
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# buffer
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if len(buff) > buff_sz*1024:
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conn.send(buff)
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buff = b''
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buff_sz = 64
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return size
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mod.link_function("wasi_unstable", "fd_write", "i(i*i*)", fd_write)
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wasm_start = rt.find_function("_start")
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wasm_start()
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p.join()
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