MrSinatra;573150 Wrote: > wow, no floating point. i wonder if an ARM can compress in real time > consistently?
Not without a fair amount of effort, I believe -- there are some fixed-point MP3 encoder implementations out there, but getting them to work efficiently often requires being very familiar with the CPU architecture so that you can take advantage of the way the pipeline and caches work. There's also one more trick up the Beagleboard's (and Hawkboard's) sleeve: It's using a TI OMAP part, which is actually both an ARM CPU core as well as a TI DSP core on one chip. So there's a possibility someone might have a freely available MP3 encoder for the DSP core as well, which could work as well. But as I say, I was really just looking for a "simple" solution to try out before having to delve into the intricacies of optimized MP3 encoders or getting ARM-DSP communications working. > so the beaglebox can accept digital audio from the DAB digitally, and it > also has a rs-232 that it could use (via a script or something) to > understand the rs-232 output of the DAB? Actually Beagleboards only have analog audio inputs, but the similar Hawkboard can directly accept digital audio. Otherwise yes, this is correct. > my understanding is the metadata travels with the audio, simultaneously, > but separately. its not "part" of the audio, like in a local file. What Shoutcast does is as simple (and crude) as saying, "OK, I'm going to give you an MP3 stream, but then every XXXX bytes, I'm going to instead switch over to a metadata structure instead, send you those bytes, and then switch back to the MP3 stream." > is the beaglebox linux? That's how I was planning to use it (and arguably the most common OS people use on it) -- some folks have tried out a few other OSes, though... Symbian, Android (ok, kissing cousin of Linux), QNX, etc. ---Joel -- JKoltner ------------------------------------------------------------------------ JKoltner's Profile: http://forums.slimdevices.com/member.php?userid=22531 View this thread: http://forums.slimdevices.com/showthread.php?t=81604 _______________________________________________ ripping mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/ripping
