def _init_audio(self):
if sdl2.SDL_InitSubSystem(sdl2.SDL_INIT_AUDIO) != 0:
raise RuntimeError("Failed to init audio")
nsamples = self.chunksize * self.nchannels
# For some reason, on OS X, this is 2x bigger than expected.
# HACK!
import sys
if sys.platform == "darwin":
nsamples = int(nsamples / 2)
self._audio_spec = sdl2.SDL_AudioSpec(
self.R,
# sdl2.AUDIO_S16MSB,
sdl2.AUDIO_S16LSB, # endianness eek!
self.nchannels,
nsamples,
sdl2.SDL_AudioCallback(self._handle_audio_cb),
)
self._devid = sdl2.SDL_OpenAudioDevice(None, 0, self._audio_spec, None,
0)
# start playing (well-named function!)
sdl2.SDL_PauseAudioDevice(self._devid, 0)
def __init__(self):
""" Initialise sound system. """
if not sdl2:
logging.warning(
'SDL2 module not found. Failed to initialise SDL2 audio plugin.'
)
raise audio.InitFailed()
if not numpy:
logging.warning(
'NumPy module not found. Failed to initialise SDL2 audio plugin.'
)
raise audio.InitFailed()
# sound generators for each tone
self.generators = [deque(), deque(), deque(), deque()]
# buffer of samples; drained by callback, replenished by _play_sound
self.samples = [numpy.array([], numpy.int16) for _ in range(4)]
# SDL AudioDevice and specifications
self.audiospec = sdl2.SDL_AudioSpec(0, 0, 0, 0)
self.audiospec.freq = sample_rate
# samples are 16-bit signed ints
self.audiospec.format = sdl2.AUDIO_S16SYS
self.audiospec.channels = 1
self.audiospec.samples = callback_chunk_length
self.audiospec.callback = sdl2.SDL_AudioCallback(self._get_next_chunk)
self.dev = None
# start audio thread
audio.AudioPlugin.__init__(self)
def setup(self, fmt):
if fmt.codec == AudioCodec.AAC:
sdl_audio_fmt = sdl2.AUDIO_F32LSB
self._resampler = AACResampler('flt', fmt.sample_rate,
fmt.channels)
elif fmt.codec == AudioCodec.PCM:
raise TypeError("PCM format not implemented")
elif fmt.codec == AudioCodec.Opus:
raise TypeError("Opus format not implemented")
else:
raise TypeError("Unknown audio codec: %d" % fmt.codec)
self._channels = fmt.channels
self._sample_rate = fmt.sample_rate
self._decoder = FrameDecoder.audio(fmt.codec)
dummy_callback = sdl2.SDL_AudioCallback()
target_spec = sdl2.SDL_AudioSpec(self._sample_rate, sdl_audio_fmt,
self._channels, self._sample_size,
dummy_callback)
self._audio_spec = sdl2.SDL_AudioSpec(self._sample_rate, sdl_audio_fmt,
self._channels,
self._sample_size,
dummy_callback)
self._dev = sdl2.SDL_OpenAudioDevice(
None, 0, target_spec, self._audio_spec,
sdl2.SDL_AUDIO_ALLOW_FORMAT_CHANGE)
if not self._dev:
raise AudioRenderError(
"SDL: Could not open audio device: %s - exiting",
sdl2.SDL_GetError())
# TODO: Is this even possible?
if target_spec.format != self._audio_spec.format:
log.error("SDL: We didn't get requested audio format")
# Start playback
sdl2.SDL_PauseAudioDevice(self._dev, 0)
def main():
if len(sys.argv) != 2:
print("usage: 3dwf.py REMOTE_ADDRESS", file=sys.stderr)
sys.exit(1)
nbins = 256
overlap = 192
rem_address = (sys.argv[1], 3731)
conn = socket.create_connection(rem_address)
sdl2.SDL_Init(sdl2.SDL_INIT_VIDEO | sdl2.SDL_INIT_AUDIO)
window = sdl2.SDL_CreateWindow(b"3D Waterfall", sdl2.SDL_WINDOWPOS_CENTERED,
sdl2.SDL_WINDOWPOS_CENTERED, 800, 600,
sdl2.SDL_WINDOW_RESIZABLE | sdl2.SDL_WINDOW_OPENGL)
context = sdl2.SDL_GL_CreateContext(window)
wf = WFViewer(nbins)
wf.init(800, 600)
wf.shift = 0
filt = interp_fir_filter(lowpass(np.pi / 4, 512) * np.hamming(512), 4)
freqx = freq_translator((0.8/8.0) * np.pi)
headlen = max(filt.nhistory, overlap)
ringbuf = RingBuf(headlen, np.zeros(headlen + (nbins - overlap) * 512, dtype=np.complex64))
# FIXME
global audio_edge
audio_edge = 0
def callback(unused, buf, buflen):
global audio_edge
bufbuf = pybuf_from_memory(buf, buflen, 0x200) # PyBUF_WRITE
array = np.frombuffer(bufbuf, np.float32)
assert len(array) % filt.interp == 0 # TODO
nreqframes = len(array) // filt.interp
loc_ringbuf_edge = ringbuf.fill_edge
if loc_ringbuf_edge < 0 or (loc_ringbuf_edge - audio_edge) % len(ringbuf) < nreqframes:
print("audio underrun", file=sys.stderr)
array.fill(0)
return
# TODO
if audio_edge + nreqframes > len(ringbuf):
audio_edge = 0
slic = ringbuf.slice(audio_edge - filt.nhistory, audio_edge + nreqframes)
array[:] = np.real(freqx(filt(slic))) * wf.volume
audio_edge += nreqframes
sdl2.SDL_PushEvent(UPDATE_EVENT)
audio_spec = sdl2.SDL_AudioSpec(8000,
sdl2.AUDIO_F32,
1,
512,
sdl2.SDL_AudioCallback(callback))
audio_dev = sdl2.SDL_OpenAudioDevice(None, 0, audio_spec, None, 0)
if audio_dev == 0:
raise Error('could not open audio device')
err_queue = queue.Queue()
def readfunc(nbytes):
bytes = b''
while len(bytes) < nbytes:
ret = conn.recv(nbytes - len(bytes))
if not ret:
raise Exception('end of stream')
bytes += ret
return bytes
def thread_target():
try:
input_thread(readfunc, ringbuf, nbins, overlap, wf)
except Exception as e:
err_queue.put(e)
event = sdl2.SDL_Event()
event.type = sdl2.SDL_QUIT
sdl2.SDL_PushEvent(event)
other_thread = threading.Thread(target=thread_target)
other_thread.setDaemon(True)
other_thread.start()
sdl2.SDL_PauseAudioDevice(audio_dev, 0)
running = True
event = sdl2.SDL_Event()
while running:
sdl2.SDL_WaitEvent(ctypes.byref(event))
while True:
if event.type == sdl2.SDL_QUIT:
running = False
break
wf.event(event)
if sdl2.SDL_PollEvent(ctypes.byref(event)) == 0:
break
# FIXME
wf.shift = ((ringbuf.fill_edge - audio_edge) % len(ringbuf)) / (nbins - overlap)
wf.draw()
sdl2.SDL_GL_SwapWindow(window)
try:
for exc in iter(err_queue.get_nowait, None):
sdl2.SDL_ShowSimpleMessageBox(sdl2.SDL_MESSAGEBOX_ERROR, b"Exception", str(exc).encode("ascii"), None)
except queue.Empty:
pass
sdl2.SDL_CloseAudioDevice(audio_dev)
sdl2.SDL_GL_DeleteContext(context)
sdl2.SDL_DestroyWindow(window)
sdl2.SDL_Quit()
def __init__(self,
perhiperal_type=Input.Type.JOYSTICK,
verbosity=0,
silent=False):
self.atari = jigo2600.Atari2600()
self.speed = 1
self.max_fps = 60.
self.aspect = 1.8
self.paused = False
self.done = False
self.verbosity = verbosity
self.cart_db = None
self.cart_sha1 = None
self.cart_meta = None
self.peripheral_type = Input.Type.JOYSTICK
self.switches_interface = SwitchesInterface()
self.joysticks_interface = JoystickInterface()
self.paddles_interface = PaddleInterface()
self.input_stream = InputStream()
self.has_sdl_audio = False
self.has_sdl_gamecontroller = False
self.has_sdl_joystick = False
# Load the cartridge database.
try:
data = pkgutil.get_data('jigo2600',
'cartridges.json').decode("utf8")
self.cart_db = json.loads(data)
del data
except FileNotFoundError:
if self.verbosity > 0:
print(f'Warning: could not open the cartridge metadata file')
# Setup the graphics.
frame = self.atari.get_current_frame()
if sdl2.SDL_Init(sdl2.SDL_INIT_VIDEO) != 0:
print(sdl2.SDL_GetError())
sys.exit(-1)
self.screen = sdl2.SDL_CreateWindow(
b"Atari2600", sdl2.SDL_WINDOWPOS_UNDEFINED,
sdl2.SDL_WINDOWPOS_UNDEFINED, int(frame.width * self.aspect * 2),
int(frame.height * 2),
sdl2.SDL_WINDOW_SHOWN | sdl2.SDL_WINDOW_RESIZABLE)
if not self.screen:
print(sdl2.SDL_GetError())
sys.exit(-1)
self.renderer = sdl2.SDL_CreateRenderer(self.screen, -1,
sdl2.SDL_RENDERER_PRESENTVSYNC)
self.texture = sdl2.SDL_CreateTexture(self.renderer,
sdl2.SDL_PIXELFORMAT_BGRA32,
sdl2.SDL_TEXTUREACCESS_STREAMING,
frame.width, frame.height)
# Setup the audio.
self.has_sdl_audio = not silent and (sdl2.SDL_InitSubSystem(
sdl2.SDL_INIT_AUDIO) == 0)
if self.has_sdl_audio:
self.audio_spec = sdl2.SDL_AudioSpec(
44100, sdl2.AUDIO_U8, 1, 1024,
sdl2.SDL_AudioCallback(self.play_audio))
self.audio_dev = sdl2.SDL_OpenAudioDevice(None, 0, self.audio_spec,
self.audio_spec, 0)
self.audio_buffer_rate = self.audio_spec.freq / self.audio_spec.samples
assert self.audio_spec.channels == 1
# Setup the joysticks.
self.has_sdl_joystick = (sdl2.SDL_InitSubSystem(
sdl2.SDL_INIT_JOYSTICK) == 0)
if self.has_sdl_joystick:
sdl2.SDL_SetHint(sdl2.SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,
b"1")
sdl2.SDL_JoystickEventState(sdl2.SDL_ENABLE)
# Setup the game controllers.
self.has_sdl_gamecontroller = (sdl2.SDL_InitSubSystem(
sdl2.SDL_INIT_GAMECONTROLLER) == 0)
if self.has_sdl_gamecontroller:
sdl2.SDL_GameControllerEventState(sdl2.SDL_ENABLE)
data = pkgutil.get_data("jigo2600", "gamecontrollerdb.txt")
rw = sdl2.SDL_RWFromConstMem(data, len(data))
n = sdl2.SDL_GameControllerAddMappingsFromRW(rw, False)
if self.verbosity > 0:
if n == -1:
print(
f"Warning: could not load the controller database file"
)
else:
print(f"Loaded {n} game controller mappings")