364 lines
20 KiB
Python
364 lines
20 KiB
Python
from ctypes import c_int, POINTER, c_void_p, byref, ArgumentError, c_uint32, CFUNCTYPE, c_size_t, c_uint8, c_uint16
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from ctypes import c_char_p, c_int32, c_bool, cast
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from wrapper.libtox import LibToxAV
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from wrapper.toxav_enums import *
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class ToxAV:
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"""
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The ToxAV instance type. Each ToxAV instance can be bound to only one Tox instance, and Tox instance can have only
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one ToxAV instance. One must make sure to close ToxAV instance prior closing Tox instance otherwise undefined
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behaviour occurs. Upon closing of ToxAV instance, all active calls will be forcibly terminated without notifying
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peers.
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"""
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# -----------------------------------------------------------------------------------------------------------------
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# Creation and destruction
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# -----------------------------------------------------------------------------------------------------------------
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def __init__(self, tox_pointer):
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"""
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Start new A/V session. There can only be only one session per Tox instance.
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:param tox_pointer: pointer to Tox instance
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"""
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self.libtoxav = LibToxAV()
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toxav_err_new = c_int()
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f = self.libtoxav.toxav_new
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f.restype = POINTER(c_void_p)
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self._toxav_pointer = f(tox_pointer, byref(toxav_err_new))
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toxav_err_new = toxav_err_new.value
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if toxav_err_new == TOXAV_ERR_NEW['NULL']:
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raise ArgumentError('One of the arguments to the function was NULL when it was not expected.')
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elif toxav_err_new == TOXAV_ERR_NEW['MALLOC']:
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raise MemoryError('Memory allocation failure while trying to allocate structures required for the A/V '
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'session.')
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elif toxav_err_new == TOXAV_ERR_NEW['MULTIPLE']:
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raise RuntimeError('Attempted to create a second session for the same Tox instance.')
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self.call_state_cb = None
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self.audio_receive_frame_cb = None
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self.video_receive_frame_cb = None
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self.call_cb = None
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def kill(self):
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"""
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Releases all resources associated with the A/V session.
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If any calls were ongoing, these will be forcibly terminated without notifying peers. After calling this
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function, no other functions may be called and the av pointer becomes invalid.
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"""
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self.libtoxav.toxav_kill(self._toxav_pointer)
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def get_tox_pointer(self):
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"""
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Returns the Tox instance the A/V object was created for.
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:return: pointer to the Tox instance
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"""
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self.libtoxav.toxav_get_tox.restype = POINTER(c_void_p)
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return self.libtoxav.toxav_get_tox(self._toxav_pointer)
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# -----------------------------------------------------------------------------------------------------------------
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# A/V event loop
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# -----------------------------------------------------------------------------------------------------------------
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def iteration_interval(self):
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"""
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Returns the interval in milliseconds when the next toxav_iterate call should be. If no call is active at the
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moment, this function returns 200.
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:return: interval in milliseconds
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"""
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return self.libtoxav.toxav_iteration_interval(self._toxav_pointer)
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def iterate(self):
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"""
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Main loop for the session. This function needs to be called in intervals of toxav_iteration_interval()
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milliseconds. It is best called in the separate thread from tox_iterate.
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"""
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self.libtoxav.toxav_iterate(self._toxav_pointer)
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# -----------------------------------------------------------------------------------------------------------------
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# Call setup
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# -----------------------------------------------------------------------------------------------------------------
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def call(self, friend_number, audio_bit_rate, video_bit_rate):
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"""
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Call a friend. This will start ringing the friend.
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It is the client's responsibility to stop ringing after a certain timeout, if such behaviour is desired. If the
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client does not stop ringing, the library will not stop until the friend is disconnected. Audio and video
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receiving are both enabled by default.
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:param friend_number: The friend number of the friend that should be called.
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:param audio_bit_rate: Audio bit rate in Kb/sec. Set this to 0 to disable audio sending.
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:param video_bit_rate: Video bit rate in Kb/sec. Set this to 0 to disable video sending.
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:return: True on success.
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"""
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toxav_err_call = c_int()
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result = self.libtoxav.toxav_call(self._toxav_pointer, c_uint32(friend_number), c_uint32(audio_bit_rate),
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c_uint32(video_bit_rate), byref(toxav_err_call))
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toxav_err_call = toxav_err_call.value
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if toxav_err_call == TOXAV_ERR_CALL['OK']:
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return bool(result)
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elif toxav_err_call == TOXAV_ERR_CALL['MALLOC']:
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raise MemoryError('A resource allocation error occurred while trying to create the structures required for '
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'the call.')
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elif toxav_err_call == TOXAV_ERR_CALL['SYNC']:
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raise RuntimeError('Synchronization error occurred.')
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elif toxav_err_call == TOXAV_ERR_CALL['FRIEND_NOT_FOUND']:
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raise ArgumentError('The friend number did not designate a valid friend.')
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elif toxav_err_call == TOXAV_ERR_CALL['FRIEND_NOT_CONNECTED']:
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raise ArgumentError('The friend was valid, but not currently connected.')
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elif toxav_err_call == TOXAV_ERR_CALL['FRIEND_ALREADY_IN_CALL']:
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raise ArgumentError('Attempted to call a friend while already in an audio or video call with them.')
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elif toxav_err_call == TOXAV_ERR_CALL['INVALID_BIT_RATE']:
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raise ArgumentError('Audio or video bit rate is invalid.')
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def callback_call(self, callback, user_data):
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"""
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Set the callback for the `call` event. Pass None to unset.
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:param callback: The function for the call callback.
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Should take pointer (c_void_p) to ToxAV object,
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The friend number (c_uint32) from which the call is incoming.
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True (c_bool) if friend is sending audio.
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True (c_bool) if friend is sending video.
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pointer (c_void_p) to user_data
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:param user_data: pointer (c_void_p) to user data
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"""
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c_callback = CFUNCTYPE(None, c_void_p, c_uint32, c_bool, c_bool, c_void_p)
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self.call_cb = c_callback(callback)
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self.libtoxav.toxav_callback_call(self._toxav_pointer, self.call_cb, user_data)
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def answer(self, friend_number, audio_bit_rate, video_bit_rate):
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"""
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Accept an incoming call.
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If answering fails for any reason, the call will still be pending and it is possible to try and answer it later.
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Audio and video receiving are both enabled by default.
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:param friend_number: The friend number of the friend that is calling.
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:param audio_bit_rate: Audio bit rate in Kb/sec. Set this to 0 to disable audio sending.
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:param video_bit_rate: Video bit rate in Kb/sec. Set this to 0 to disable video sending.
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:return: True on success.
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"""
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toxav_err_answer = c_int()
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result = self.libtoxav.toxav_answer(self._toxav_pointer, c_uint32(friend_number), c_uint32(audio_bit_rate),
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c_uint32(video_bit_rate), byref(toxav_err_answer))
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toxav_err_answer = toxav_err_answer.value
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if toxav_err_answer == TOXAV_ERR_ANSWER['OK']:
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return bool(result)
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elif toxav_err_answer == TOXAV_ERR_ANSWER['SYNC']:
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raise RuntimeError('Synchronization error occurred.')
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elif toxav_err_answer == TOXAV_ERR_ANSWER['CODEC_INITIALIZATION']:
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raise RuntimeError('Failed to initialize codecs for call session. Note that codec initiation will fail if '
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'there is no receive callback registered for either audio or video.')
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elif toxav_err_answer == TOXAV_ERR_ANSWER['FRIEND_NOT_FOUND']:
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raise ArgumentError('The friend number did not designate a valid friend.')
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elif toxav_err_answer == TOXAV_ERR_ANSWER['FRIEND_NOT_CALLING']:
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raise ArgumentError('The friend was valid, but they are not currently trying to initiate a call. This is '
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'also returned if this client is already in a call with the friend.')
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elif toxav_err_answer == TOXAV_ERR_ANSWER['INVALID_BIT_RATE']:
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raise ArgumentError('Audio or video bit rate is invalid.')
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# -----------------------------------------------------------------------------------------------------------------
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# Call state graph
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# -----------------------------------------------------------------------------------------------------------------
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def callback_call_state(self, callback, user_data):
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"""
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Set the callback for the `call_state` event. Pass None to unset.
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:param callback: Python function.
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The function for the call_state callback.
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Should take pointer (c_void_p) to ToxAV object,
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The friend number (c_uint32) for which the call state changed.
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The bitmask of the new call state which is guaranteed to be different than the previous state. The state is set
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to 0 when the call is paused. The bitmask represents all the activities currently performed by the friend.
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pointer (c_void_p) to user_data
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:param user_data: pointer (c_void_p) to user data
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"""
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c_callback = CFUNCTYPE(None, c_void_p, c_uint32, c_uint32, c_void_p)
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self.call_state_cb = c_callback(callback)
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self.libtoxav.toxav_callback_call_state(self._toxav_pointer, self.call_state_cb, user_data)
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# -----------------------------------------------------------------------------------------------------------------
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# Call control
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# -----------------------------------------------------------------------------------------------------------------
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def call_control(self, friend_number, control):
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"""
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Sends a call control command to a friend.
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:param friend_number: The friend number of the friend this client is in a call with.
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:param control: The control command to send.
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:return: True on success.
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"""
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toxav_err_call_control = c_int()
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result = self.libtoxav.toxav_call_control(self._toxav_pointer, c_uint32(friend_number), c_int(control),
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byref(toxav_err_call_control))
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toxav_err_call_control = toxav_err_call_control.value
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if toxav_err_call_control == TOXAV_ERR_CALL_CONTROL['OK']:
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return bool(result)
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elif toxav_err_call_control == TOXAV_ERR_CALL_CONTROL['SYNC']:
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raise RuntimeError('Synchronization error occurred.')
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elif toxav_err_call_control == TOXAV_ERR_CALL_CONTROL['FRIEND_NOT_FOUND']:
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raise ArgumentError('The friend_number passed did not designate a valid friend.')
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elif toxav_err_call_control == TOXAV_ERR_CALL_CONTROL['FRIEND_NOT_IN_CALL']:
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raise RuntimeError('This client is currently not in a call with the friend. Before the call is answered, '
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'only CANCEL is a valid control.')
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elif toxav_err_call_control == TOXAV_ERR_CALL_CONTROL['INVALID_TRANSITION']:
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raise RuntimeError('Happens if user tried to pause an already paused call or if trying to resume a call '
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'that is not paused.')
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# -----------------------------------------------------------------------------------------------------------------
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# TODO Controlling bit rates
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# -----------------------------------------------------------------------------------------------------------------
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# -----------------------------------------------------------------------------------------------------------------
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# A/V sending
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# -----------------------------------------------------------------------------------------------------------------
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def audio_send_frame(self, friend_number, pcm, sample_count, channels, sampling_rate):
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"""
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Send an audio frame to a friend.
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The expected format of the PCM data is: [s1c1][s1c2][...][s2c1][s2c2][...]...
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Meaning: sample 1 for channel 1, sample 1 for channel 2, ...
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For mono audio, this has no meaning, every sample is subsequent. For stereo, this means the expected format is
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LRLRLR... with samples for left and right alternating.
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:param friend_number: The friend number of the friend to which to send an audio frame.
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:param pcm: An array of audio samples. The size of this array must be sample_count * channels.
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:param sample_count: Number of samples in this frame. Valid numbers here are
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((sample rate) * (audio length) / 1000), where audio length can be 2.5, 5, 10, 20, 40 or 60 milliseconds.
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:param channels: Number of audio channels. Sulpported values are 1 and 2.
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:param sampling_rate: Audio sampling rate used in this frame. Valid sampling rates are 8000, 12000, 16000,
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24000, or 48000.
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"""
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toxav_err_send_frame = c_int()
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result = self.libtoxav.toxav_audio_send_frame(self._toxav_pointer, c_uint32(friend_number),
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cast(pcm, c_void_p),
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c_size_t(sample_count), c_uint8(channels),
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c_uint32(sampling_rate), byref(toxav_err_send_frame))
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toxav_err_send_frame = toxav_err_send_frame.value
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if toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['OK']:
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return bool(result)
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['NULL']:
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raise ArgumentError('The samples data pointer was NULL.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['FRIEND_NOT_FOUND']:
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raise ArgumentError('The friend_number passed did not designate a valid friend.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['FRIEND_NOT_IN_CALL']:
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raise RuntimeError('This client is currently not in a call with the friend.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['SYNC']:
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raise RuntimeError('Synchronization error occurred.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['INVALID']:
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raise ArgumentError('One of the frame parameters was invalid. E.g. the resolution may be too small or too '
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'large, or the audio sampling rate may be unsupported.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['PAYLOAD_TYPE_DISABLED']:
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raise RuntimeError('Either friend turned off audio or video receiving or we turned off sending for the said'
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'payload.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['RTP_FAILED']:
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RuntimeError('Failed to push frame through rtp interface.')
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def video_send_frame(self, friend_number, width, height, y, u, v):
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"""
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Send a video frame to a friend.
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Y - plane should be of size: height * width
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U - plane should be of size: (height/2) * (width/2)
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V - plane should be of size: (height/2) * (width/2)
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:param friend_number: The friend number of the friend to which to send a video frame.
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:param width: Width of the frame in pixels.
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:param height: Height of the frame in pixels.
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:param y: Y (Luminance) plane data.
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:param u: U (Chroma) plane data.
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:param v: V (Chroma) plane data.
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"""
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toxav_err_send_frame = c_int()
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result = self.libtoxav.toxav_video_send_frame(self._toxav_pointer, c_uint32(friend_number), c_uint16(width),
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c_uint16(height), c_char_p(y), c_char_p(u), c_char_p(v),
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byref(toxav_err_send_frame))
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toxav_err_send_frame = toxav_err_send_frame.value
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if toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['OK']:
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return bool(result)
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['NULL']:
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raise ArgumentError('One of Y, U, or V was NULL.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['FRIEND_NOT_FOUND']:
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raise ArgumentError('The friend_number passed did not designate a valid friend.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['FRIEND_NOT_IN_CALL']:
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raise RuntimeError('This client is currently not in a call with the friend.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['SYNC']:
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raise RuntimeError('Synchronization error occurred.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['INVALID']:
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raise ArgumentError('One of the frame parameters was invalid. E.g. the resolution may be too small or too '
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'large, or the audio sampling rate may be unsupported.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['PAYLOAD_TYPE_DISABLED']:
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raise RuntimeError('Either friend turned off audio or video receiving or we turned off sending for the said'
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'payload.')
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elif toxav_err_send_frame == TOXAV_ERR_SEND_FRAME['RTP_FAILED']:
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RuntimeError('Failed to push frame through rtp interface.')
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# -----------------------------------------------------------------------------------------------------------------
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# A/V receiving
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# -----------------------------------------------------------------------------------------------------------------
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def callback_audio_receive_frame(self, callback, user_data):
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"""
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Set the callback for the `audio_receive_frame` event. Pass None to unset.
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:param callback: Python function.
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Function for the audio_receive_frame callback. The callback can be called multiple times per single
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iteration depending on the amount of queued frames in the buffer. The received format is the same as in send
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function.
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Should take pointer (c_void_p) to ToxAV object,
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The friend number (c_uint32) of the friend who sent an audio frame.
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An array (c_uint8) of audio samples (sample_count * channels elements).
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The number (c_size_t) of audio samples per channel in the PCM array.
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Number (c_uint8) of audio channels.
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Sampling rate (c_uint32) used in this frame.
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pointer (c_void_p) to user_data
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:param user_data: pointer (c_void_p) to user data
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"""
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c_callback = CFUNCTYPE(None, c_void_p, c_uint32, POINTER(c_uint8), c_size_t, c_uint8, c_uint32, c_void_p)
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self.audio_receive_frame_cb = c_callback(callback)
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self.libtoxav.toxav_callback_audio_receive_frame(self._toxav_pointer, self.audio_receive_frame_cb, user_data)
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def callback_video_receive_frame(self, callback, user_data):
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"""
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Set the callback for the `video_receive_frame` event. Pass None to unset.
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:param callback: Python function.
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The function type for the video_receive_frame callback.
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Should take
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toxAV pointer (c_void_p) to ToxAV object,
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friend_number The friend number (c_uint32) of the friend who sent a video frame.
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width Width (c_uint16) of the frame in pixels.
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height Height (c_uint16) of the frame in pixels.
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y
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u
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v Plane data (POINTER(c_uint8)).
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The size of plane data is derived from width and height where
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Y = MAX(width, abs(ystride)) * height,
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U = MAX(width/2, abs(ustride)) * (height/2) and
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V = MAX(width/2, abs(vstride)) * (height/2).
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ystride
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ustride
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vstride Strides data (c_int32). Strides represent padding for each plane that may or may not be present. You must
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handle strides in your image processing code. Strides are negative if the image is bottom-up
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hence why you MUST abs() it when calculating plane buffer size.
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user_data pointer (c_void_p) to user_data
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:param user_data: pointer (c_void_p) to user data
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"""
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c_callback = CFUNCTYPE(None, c_void_p, c_uint32, c_uint16, c_uint16, POINTER(c_uint8), POINTER(c_uint8),
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POINTER(c_uint8), c_int32, c_int32, c_int32, c_void_p)
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self.video_receive_frame_cb = c_callback(callback)
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self.libtoxav.toxav_callback_video_receive_frame(self._toxav_pointer, self.video_receive_frame_cb, user_data)
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