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资源说明：Simple JACK client for PCM Output
jack2pcm ======== Version 0.2.1, 15 December 2008 Written by Paul Kelly for Radiomonitor Ltd. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Usage ----- jack2pcm [-n] [-b ] [-xqh] [ ] -n name for this JACK client (default jack2pcm-PID) -b set ringbuffer to this size in bytes per port (k or M suffix accepted; default 1M) -x swap byte order & autoconnect JACK client to these port(s) -q Don't display progress information -h display this usage message and exit Overview -------- This utility is a simple JACK client that connects to one or more JACK ports as specified on the command-line, converts the audio data read from those port(s) to signed 16-bit PCM samples and writes it to standard output. Any samples outside the normal range -1.0/+1.0 are clipped to the minimum/maximum values representable by a signed 16-bit number. When more than one port is specified, the samples from the ports are interleaved in the output. A ringbuffer is used internally to buffer the real-time JACK callback from the sample conversion and output code; the size of this ringbuffer may be specified on the command-line. If the -x option is specifed, the most and least significant bytes in each 16-bit output sample are swapped from the native host order. Installation ------------ The only dependency is JACK itself; an autoconf-based configure script is used to detect the necessary compile flags. The following options are accepted: --with-jack-includes=DIRS JACK include files are in DIRS --with-jack-libs=DIRS JACK library files are in DIRS A typical configure line (Bourne shell syntax) might be: CFLAGS=-O3 LDFLAGS=-s ./configure --prefix=/usr Then a simple "make" will compile the program. "make install" will install to the specified prefix. -- paul@stjohnspoint.co.uk Belfast, December 2008.
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