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View Code? Open in Web Editor NEWRTP support for Pure Data - secondary of https://git.iem.at/pd/iemrtp
Home Page: https://git.iem.at/pd/iemrtp
License: GNU Lesser General Public License v2.1
RTP support for Pure Data - secondary of https://git.iem.at/pd/iemrtp
Home Page: https://git.iem.at/pd/iemrtp
License: GNU Lesser General Public License v2.1
iemrtp - RTP support for Pd =========================== this is a small set of objects for transmitting audio over the internet, in a standardized format. these objects convert audio data to byte-packets and vice-versa. the actual transmission (sending/receiving) has to be handled by other means, e.g. mrpeach's or iemnet's [udpsend]/[udpreceive]. RTP (and the accompanying RTCP) are described in RFC3550 iemrtp does not give you a ready solution for streaming audio. instead it gives you all the building blocks needed to create a solution for streaming audio. working examples can be found in examples/ RTP === RTP is the "Real-time Transport Protocol", a lightweight protocol for transmitting media data (e.g. audio) over the internet. payloader: [rtp*pay~] --------------------- generate packets containing multichannel audio-data for a given profile packets have a valid RTP-header that can be modified via messages (timestamps, sequence number, payload-type). depayloader: [unpackRTP] + [*decode] ------------------------------------ parse and decode an RTP-packet. [unpackRTP] will give you all the meta-information (as found in the header), and will output the raw payload data. feeding the raw payload data to the appropriate decoder-object will reconstruct the original data. convenience: [rtp*depay~] ------------------------- using [unpackRTP] and a decoder it is easy to reconstruct audio-signal from RTP-packets. for convenience this is exemplified in [rtp*depay~] implemented profiles -------------------- the way, media data is encoded is called "profile" in RTP-language. currently the following formats are implemented: - L16: signed 16bit integer, interleaved [rtpL16pay~]: convert audio-signals into L16 encoded RTP-packets [L16decode] : convert L16 encoded data into de-interleaved floating point samples performance ----------- for performance reasons, the conversion *to* RTP-packets is done in a single monolithic object, whereas conversion *from* RTP-packets is modular. (that's because our current target RTP-sender is a mobile platform, whereas the RTP-receiver is a full-fledged PC) LATER we hope to make the encoder modular as well. RTCP ==== the "RTP Control Protocol" is used to monitor an RTP-connection [unpackRTCP] decodes an RTCP-package into Pd-messages. [packRTCP] synthesizes RTCP-packages from Pd-messages. AUTHORS ======= IOhannes m zmölnig - Institute of Electronic Music and Acoustics LICENSE ======= LGPL-2.1
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