kris 9da18f0ecc Initial working version of video player. ... The basic strategy is that we remove as much conditional evaluation as possible from the inner decode loop. e.g. rather than doing opcode dispatch by some kind of table lookup (etc), this is precomputed on the server side. The next opcode in the stream is encoded as a branch offset to that opcode's first instruction, and we modify the BRA instruction in place to dispatch there. TCP buffer management is also offloaded to the server side; we rely on the server to explicitly schedule an ACK opcode every 2048 bytes to drop us into a slow path where we move the W5100 read pointer, send the TCP ACK, and block until the read socket has enough data to continue with. This outer loop is overly conservative (e.g. since we're performing exactly known read sizes we can omit a lot of duplicate bookkeeping), i.e. there is a lot of room for optimizing this. Experimental (i.e. not working yet) support for audio delay loop; we should be able to leverage the way we do offset-based dispatch to implement variable-delay loops with some level of cycle resolution.		2019-02-24 00:03:36 +00:00
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ethernet	Initial working version of video player.	2019-02-24 00:03:36 +00:00