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So we exec the FD to /dev/null, # effectively closing config.log, so it can be properly (re)opened and # appended to by config.status. When coming back to configure, we # need to make the FD available again. if test "$no_create" != yes; then ac_cs_success=: ac_config_status_args= test "$silent" = yes && ac_config_status_args="$ac_config_status_args --quiet" exec 5>/dev/null $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false exec 5>>config.log # Use ||, not &&, to avoid exiting from the if with $? = 1, which # would make configure fail if this is the last instruction. $ac_cs_success || { (exit 1); exit 1; } fi if test -n "$ac_unrecognized_opts" && test "$enable_option_checking" != no; then { $as_echo "$as_me:$LINENO: WARNING: unrecognized options: $ac_unrecognized_opts" >&5 $as_echo "$as_me: WARNING: unrecognized options: $ac_unrecognized_opts" >&2;} fi silentjack-0.3/configure.ac0000644000076500000240000000151011476470055012716 00000000000000dnl Require autoconf version >= 2.59 AC_PREREQ(2.59) dnl ############# Initialization AC_INIT([silentjack], [0.3], [njh@aelius.com], silentjack) AC_CONFIG_SRCDIR(silentjack.c) AC_CONFIG_AUX_DIR([build-scripts]) AC_CONFIG_MACRO_DIR([build-scripts]) AM_INIT_AUTOMAKE dnl ############# Compiler and tools Checks AC_PROG_CC AC_PROG_INSTALL AC_PROG_LN_S AC_C_INLINE AC_C_CONST dnl ############## Library Checks AC_CHECK_LIB([m], [sqrt], , [AC_MSG_ERROR(Can't find libm)]) AC_CHECK_LIB([mx], [powf]) # Check for JACK (need 0.100.0 for jack_client_open) PKG_CHECK_MODULES(JACK, jack >= 0.100.0) dnl ############## Header and function checks AC_HEADER_STDC AC_CHECK_HEADERS([stdlib.h string.h unistd.h]) AC_CHECK_FUNCS( atexit usleep ) dnl ############## Output files AC_CONFIG_HEADERS([config.h]) AC_CONFIG_FILES([Makefile]) AC_OUTPUT silentjack-0.3/COPYING0000644000076500000240000004311011476435043011463 00000000000000 GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 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. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License. silentjack-0.3/db.h0000644000076500000240000000162711476435043011175 00000000000000/* * db.h * * Copyright (C) 2003,2006 Steve Harris, Nicholas Humfrey * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * Originally Stolen from JAMIN */ #ifndef DB_H #define DB_H static inline float db2lin( float db ) { if (db <= -90.0f) return 0.0f; else { return powf(10.0f, db * 0.05f); } } static inline float lin2db( float lin ) { if (lin == 0.0f) return -90.0f; else return (20.0f * log10f(lin)); } #endif silentjack-0.3/INSTALL0000644000076500000240000002234211476435043011465 00000000000000Installing SilentJack ===================== silentjack uses the automake build system, so should work on any system supported by JACK. Quick Start: ./configure make Then as root: make install Generic Autoconf Installation Instructions ========================================== The `configure' shell script attempts to guess correct values for various system-dependent variables used during compilation. It uses those values to create a `Makefile' in each directory of the package. It may also create one or more `.h' files containing system-dependent definitions. Finally, it creates a shell script `config.status' that you can run in the future to recreate the current configuration, and a file `config.log' containing compiler output (useful mainly for debugging `configure'). It can also use an optional file (typically called `config.cache' and enabled with `--cache-file=config.cache' or simply `-C') that saves the results of its tests to speed up reconfiguring. (Caching is disabled by default to prevent problems with accidental use of stale cache files.) If you need to do unusual things to compile the package, please try to figure out how `configure' could check whether to do them, and mail diffs or instructions to the address given in the `README' so they can be considered for the next release. If you are using the cache, and at some point `config.cache' contains results you don't want to keep, you may remove or edit it. The file `configure.ac' (or `configure.in') is used to create `configure' by a program called `autoconf'. You only need `configure.ac' if you want to change it or regenerate `configure' using a newer version of `autoconf'. The simplest way to compile this package is: 1. `cd' to the directory containing the package's source code and type `./configure' to configure the package for your system. If you're using `csh' on an old version of System V, you might need to type `sh ./configure' instead to prevent `csh' from trying to execute `configure' itself. Running `configure' takes awhile. While running, it prints some messages telling which features it is checking for. 2. Type `make' to compile the package. 3. Optionally, type `make check' to run any self-tests that come with the package. 4. Type `make install' to install the programs and any data files and documentation. 5. You can remove the program binaries and object files from the source code directory by typing `make clean'. To also remove the files that `configure' created (so you can compile the package for a different kind of computer), type `make distclean'. There is also a `make maintainer-clean' target, but that is intended mainly for the package's developers. If you use it, you may have to get all sorts of other programs in order to regenerate files that came with the distribution. Compilers and Options ===================== Some systems require unusual options for compilation or linking that the `configure' script does not know about. Run `./configure --help' for details on some of the pertinent environment variables. You can give `configure' initial values for configuration parameters by setting variables in the command line or in the environment. Here is an example: ./configure CC=c89 CFLAGS=-O2 LIBS=-lposix *Note Defining Variables::, for more details. Compiling For Multiple Architectures ==================================== You can compile the package for more than one kind of computer at the same time, by placing the object files for each architecture in their own directory. To do this, you must use a version of `make' that supports the `VPATH' variable, such as GNU `make'. `cd' to the directory where you want the object files and executables to go and run the `configure' script. `configure' automatically checks for the source code in the directory that `configure' is in and in `..'. If you have to use a `make' that does not support the `VPATH' variable, you have to compile the package for one architecture at a time in the source code directory. After you have installed the package for one architecture, use `make distclean' before reconfiguring for another architecture. Installation Names ================== By default, `make install' will install the package's files in `/usr/local/bin', `/usr/local/man', etc. You can specify an installation prefix other than `/usr/local' by giving `configure' the option `--prefix=PATH'. You can specify separate installation prefixes for architecture-specific files and architecture-independent files. If you give `configure' the option `--exec-prefix=PATH', the package will use PATH as the prefix for installing programs and libraries. Documentation and other data files will still use the regular prefix. In addition, if you use an unusual directory layout you can give options like `--bindir=PATH' to specify different values for particular kinds of files. Run `configure --help' for a list of the directories you can set and what kinds of files go in them. If the package supports it, you can cause programs to be installed with an extra prefix or suffix on their names by giving `configure' the option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'. Optional Features ================= Some packages pay attention to `--enable-FEATURE' options to `configure', where FEATURE indicates an optional part of the package. They may also pay attention to `--with-PACKAGE' options, where PACKAGE is something like `gnu-as' or `x' (for the X Window System). The `README' should mention any `--enable-' and `--with-' options that the package recognizes. For packages that use the X Window System, `configure' can usually find the X include and library files automatically, but if it doesn't, you can use the `configure' options `--x-includes=DIR' and `--x-libraries=DIR' to specify their locations. Specifying the System Type ========================== There may be some features `configure' cannot figure out automatically, but needs to determine by the type of machine the package will run on. Usually, assuming the package is built to be run on the _same_ architectures, `configure' can figure that out, but if it prints a message saying it cannot guess the machine type, give it the `--build=TYPE' option. TYPE can either be a short name for the system type, such as `sun4', or a canonical name which has the form: CPU-COMPANY-SYSTEM where SYSTEM can have one of these forms: OS KERNEL-OS See the file `config.sub' for the possible values of each field. If `config.sub' isn't included in this package, then this package doesn't need to know the machine type. If you are _building_ compiler tools for cross-compiling, you should use the `--target=TYPE' option to select the type of system they will produce code for. If you want to _use_ a cross compiler, that generates code for a platform different from the build platform, you should specify the "host" platform (i.e., that on which the generated programs will eventually be run) with `--host=TYPE'. Sharing Defaults ================ If you want to set default values for `configure' scripts to share, you can create a site shell script called `config.site' that gives default values for variables like `CC', `cache_file', and `prefix'. `configure' looks for `PREFIX/share/config.site' if it exists, then `PREFIX/etc/config.site' if it exists. Or, you can set the `CONFIG_SITE' environment variable to the location of the site script. A warning: not all `configure' scripts look for a site script. Defining Variables ================== Variables not defined in a site shell script can be set in the environment passed to `configure'. However, some packages may run configure again during the build, and the customized values of these variables may be lost. In order to avoid this problem, you should set them in the `configure' command line, using `VAR=value'. For example: ./configure CC=/usr/local2/bin/gcc will cause the specified gcc to be used as the C compiler (unless it is overridden in the site shell script). `configure' Invocation ====================== `configure' recognizes the following options to control how it operates. `--help' `-h' Print a summary of the options to `configure', and exit. `--version' `-V' Print the version of Autoconf used to generate the `configure' script, and exit. `--cache-file=FILE' Enable the cache: use and save the results of the tests in FILE, traditionally `config.cache'. FILE defaults to `/dev/null' to disable caching. `--config-cache' `-C' Alias for `--cache-file=config.cache'. `--quiet' `--silent' `-q' Do not print messages saying which checks are being made. To suppress all normal output, redirect it to `/dev/null' (any error messages will still be shown). `--srcdir=DIR' Look for the package's source code in directory DIR. Usually `configure' can determine that directory automatically. `configure' also accepts some other, not widely useful, options. Run `configure --help' for more details. Copyright 1994, 1995, 1996, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. This file is free documentation; the Free Software Foundation gives unlimited permission to copy, distribute and modify it. silentjack-0.3/Makefile.am0000644000076500000240000000023011476435444012465 00000000000000AUTOMAKE_OPTIONS = foreign AM_CFLAGS = -g -Wall @JACK_CFLAGS@ LIBS = -lm @JACK_LIBS@ bin_PROGRAMS = silentjack silentjack_SOURCES = silentjack.c db.h silentjack-0.3/Makefile.in0000644000076500000240000004641311476470153012507 00000000000000# Makefile.in generated by automake 1.11.1 from Makefile.am. # @configure_input@ # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, # 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, # Inc. # This Makefile.in is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; without # even the implied warranty of MERCHANTABILITY or FITNESS FOR A # PARTICULAR PURPOSE. @SET_MAKE@ VPATH = @srcdir@ pkgdatadir = $(datadir)/@PACKAGE@ pkgincludedir = $(includedir)/@PACKAGE@ pkglibdir = $(libdir)/@PACKAGE@ pkglibexecdir = $(libexecdir)/@PACKAGE@ am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd install_sh_DATA = $(install_sh) -c -m 644 install_sh_PROGRAM = $(install_sh) -c install_sh_SCRIPT = $(install_sh) -c INSTALL_HEADER = $(INSTALL_DATA) transform = $(program_transform_name) NORMAL_INSTALL = : PRE_INSTALL = : POST_INSTALL = : NORMAL_UNINSTALL = : PRE_UNINSTALL = : POST_UNINSTALL = : bin_PROGRAMS = silentjack$(EXEEXT) subdir = . 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Humfrey For the latest version of SilentJack, please see: http://www.aelius.com/njh/silentjack/ It is released under the GPL licence, see COPYING for details. What is SilentJack ? -------------------- SilentJack is a silence/dead air detector for the Jack Audio Connection Kit. Usage: silentjack [options] [COMMAND [ARG]...] Options: -c Connect to this port -n Name of this client (default 'silentjack') -l Trigger level (default -40 decibels) -p Period of silence required (default 1 second) -g Grace period (default 0 seconds) -v Enable verbose mode -q Enable quiet mode SilentJack runs COMMAND after silence has been detected for the given number of seconds. SilentJack then waits for the command the finish, and then wait for the grace period before detecting silence again. SilentJack's input port must be connected to an output port before it will start reporting silence. silentjack-0.3/silentjack.c0000644000076500000240000002100211476435043012717 00000000000000/* silentjack.c Silence/dead air detector for JACK Copyright (C) 2006 Nicholas J. Humfrey 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. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #include #include #include #include #include #include #include "config.h" #include "db.h" #define DEFAULT_CLIENT_NAME "silentjack" // *** Globals *** jack_port_t *input_port = NULL; // Our single jack input port float peak = 0.0f; // Current peak signal level (linear) int running = 1; // SilentJack keeps running while true int quiet = 0; // If true, don't send messages to stdout int verbose = 0; // If true, send more messages to stdout /* Read and reset the recent peak sample */ static float read_peak() { float peakdb = lin2db(peak); peak = 0.0f; return peakdb; } /* Callback called by JACK when audio is available. Stores value of peak sample */ static int process_peak(jack_nframes_t nframes, void *arg) { jack_default_audio_sample_t *in; unsigned int i; /* just incase the port isn't registered yet */ if (input_port == NULL) { return 0; } /* get the audio samples, and find the peak sample */ in = (jack_default_audio_sample_t *) jack_port_get_buffer(input_port, nframes); for (i = 0; i < nframes; i++) { const float s = fabs(in[i]); if (s > peak) { peak = s; } } return 0; } /* Connect the chosen port to ours */ static void connect_jack_port( jack_client_t *client, jack_port_t *port, const char* out ) { const char* in = jack_port_name( port ); int err; if (!quiet) printf("Connecting %s to %s\n", out, in); if ((err = jack_connect(client, out, in)) != 0) { fprintf(stderr, "connect_jack_port(): failed to jack_connect() ports: %d\n",err); exit(1); } } static void shutdown_callback_jack(void *arg) { running = 0; } static jack_client_t* init_jack( const char * client_name, const char* connect_port ) { jack_status_t status; jack_options_t options = JackNoStartServer; jack_client_t *client = NULL; // Register with Jack if ((client = jack_client_open(client_name, options, &status)) == 0) { fprintf(stderr, "Failed to start jack client: %d\n", status); exit(1); } if (!quiet) printf("JACK client registered as '%s'.\n", jack_get_client_name( client ) ); // Create our pair of output ports if (!(input_port = jack_port_register(client, "in", JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0))) { fprintf(stderr, "Cannot register input port 'in'.\n"); exit(1); } // Register shutdown callback jack_on_shutdown (client, shutdown_callback_jack, NULL ); // Register the peak audio callback jack_set_process_callback(client, process_peak, 0); // Activate the client if (jack_activate(client)) { fprintf(stderr, "Cannot activate client.\n"); exit(1); } // Connect up our input port ? if (connect_port) { connect_jack_port( client, input_port, connect_port ); } return client; } static void finish_jack( jack_client_t *client ) { // Leave the Jack graph jack_client_close(client); } static void run_command( int argc, char* argv[] ) { pid_t child; int status; // No command to execute if (argc<1) return; // Exit successfully if command is called "exit" if (argc==1 && strcmp(argv[0], "exit")==0) exit(0); // Fork new process child = fork(); if (child==0) { // Child process here if (execvp( argv[0], argv )) { perror("execvp failed"); exit(-1); } } else if (child==-1) { // Fork failed perror("fork failed"); exit(-1); } // Wait for process to end if (waitpid( child, &status, 0)==-1) { perror("waitpid failed"); } } /* Display how to use this program */ static void usage() { printf("%s version %s\n\n", PACKAGE_NAME, PACKAGE_VERSION); printf("Usage: silentjack [options] [COMMAND [ARG]...]\n"); printf("Options: -c Connect to this port\n"); printf(" -n Name of this client (default 'silentjack')\n"); printf(" -l Trigger level (default -40 decibels)\n"); printf(" -p Period of silence required (default 1 second)\n"); printf(" -d No-dynamic trigger level (default disabled)\n"); printf(" -P No-dynamic period (default 10 seconds)\n"); printf(" -g Grace period (default 0 seconds)\n"); printf(" -v Enable verbose mode\n"); printf(" -q Enable quiet mode\n"); exit(1); } int main(int argc, char *argv[]) { jack_client_t *client = NULL; const char* client_name = DEFAULT_CLIENT_NAME; const char* connect_port = NULL; float peakdb = 0.0f; // The current peak signal level (in dB) float last_peakdb = 0.0f; // The previous peak signal level (in dB) int silence_period = 1; // Required period of silence for trigger int nodynamic_period = 10; // Required period of no-dynamic for trigger int grace_period = 0; // Period to wait before triggering again float silence_theshold = -40; // Level considered silent (in dB) float nodynamic_theshold = 0; // Minimum allowed delta between peaks (in dB) int silence_count = 0; // Number of seconds of silence detected int nodynamic_count = 0; // Number of seconds of no-dynamic detected int in_grace = 0; // Number of seconds left in grace int opt; // Make STDOUT unbuffered setbuf(stdout, NULL); // Parse command line arguments while ((opt = getopt(argc, argv, "c:n:l:p:P:d:g:vqh")) != -1) { switch (opt) { case 'c': connect_port = optarg; break; case 'n': client_name = optarg; break; case 'l': silence_theshold = atof(optarg); break; case 'p': silence_period = fabs(atoi(optarg)); break; case 'd': nodynamic_theshold = atof(optarg); break; case 'P': nodynamic_period = atof(optarg); break; case 'g': grace_period = fabs(atoi(optarg)); break; case 'v': verbose = 1; break; case 'q': quiet = 1; break; case 'h': default: /* Show usage information */ usage(); break; } } argc -= optind; argv += optind; // Validate parameters if (quiet && verbose) { fprintf(stderr, "Can't be quiet and verbose at the same time.\n"); usage(); } // Initialise Jack client = init_jack( client_name, connect_port ); // Main loop while (running) { // Sleep for 1 second usleep( 1000000 ); // Are we in grace period ? if (in_grace) { in_grace--; if (verbose) printf("%d seconds left in grace period.\n", in_grace); continue; } // Check we are connected to something if (jack_port_connected(input_port)==0) { if (verbose) printf("Input port isn't connected to anything.\n"); continue; } // Read the recent peak (in decibels) last_peakdb = peakdb; peakdb = read_peak(); // Do silence detection? if (silence_theshold) { if (verbose) printf("peak: %2.2fdB", peakdb); // Is peak too low? if (peakdb < silence_theshold) { silence_count++; if (verbose) printf(" (%d seconds of silence)\n", silence_count); } else { if (verbose) printf(" (not silent)\n"); silence_count=0; } // Have we had enough seconds of silence? if (silence_count >= silence_period) { if (!quiet) printf("**SILENCE**\n"); run_command( argc, argv ); silence_count = 0; in_grace = grace_period; } } // Do no-dynamic detection if (nodynamic_theshold) { if (verbose) printf("delta: %2.2fdB", fabs(last_peakdb-peakdb)); // Check the dynamic/delta between peaks if (fabs(last_peakdb-peakdb) < nodynamic_theshold) { nodynamic_count++; if (verbose) printf(" (%d seconds of no dynamic)\n", nodynamic_count); } else { if (verbose) printf(" (dynamic)\n"); nodynamic_count=0; } // Have we had enough seconds of no dynamic? if (nodynamic_count >= nodynamic_period) { if (!quiet) printf("**NO DYNAMIC**\n"); run_command( argc, argv ); nodynamic_count = 0; in_grace = grace_period; } } } // Clean up finish_jack( client ); return 0; }