commit 72b0d35e6c52a13f133e26b74b2414cf94fbc8e8 Author: Andreas Eversberg Date: Sat Mar 13 17:09:20 2021 +0100 Initial commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..d7b19b0 --- /dev/null +++ b/.gitignore @@ -0,0 +1,47 @@ +Makefile +Makefile.in +.deps +.libs +*.o +*.lo +*.la +*.pc +aclocal.m4 +acinclude.m4 +aminclude.am +m4/*.m4 +autom4te.cache +compile +config.h* +config.sub +config.log +config.status +config.guess +configure +depcomp +missing +ltmain.sh +install-sh +stamp-h1 +libtool + +.tarball-version +.version +.dirstamp + +Doxyfile + +.*.sw? + +src/libdebug/libdebug.a +src/libg711/libg711.a +src/libjitter/libjitter.a +src/liboptions/liboptions.a +src/libosmocc/libosmocc.a +src/libsample/libsample.a +src/libsamplerate/libsamplerate.a +src/libfilter/libfilter.a +src/libtimer/libtimer.a +src/libsound/libsound.a +src/telephone/osmo-cc-alsa-endpoint + diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program 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, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU 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 Lesser General +Public License instead of this License. But first, please read +. diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..689d568 --- /dev/null +++ b/Makefile.am @@ -0,0 +1,5 @@ +AUTOMAKE_OPTIONS = foreign dist-bzip2 1.6 +ACLOCAL_AMFLAGS = -I m4 + +SUBDIRS = src + diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..8fb32f4 --- /dev/null +++ b/configure.ac @@ -0,0 +1,98 @@ +AC_INIT([osmo-cc-alsa-endpoint], + m4_esyscmd([./git-version-gen .tarball-version]), + [jolly@eversberg.eu]) + +dnl *This* is the root dir, even if an install-sh exists in ../ or ../../ +AC_CONFIG_AUX_DIR([.]) + +AM_INIT_AUTOMAKE([subdir-objects dist-bzip2]) +AC_CONFIG_TESTDIR(tests) + +dnl kernel style compile messages +m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) + +dnl include release helper +RELMAKE='-include osmo-release.mk' +AC_SUBST([RELMAKE]) + +dnl checks for programs +AC_PROG_MAKE_SET +AC_PROG_CC +AC_PROG_INSTALL +AC_PROG_RANLIB + +AC_CONFIG_MACRO_DIR([m4]) + +AC_ARG_ENABLE(sanitize, + [AS_HELP_STRING( + [--enable-sanitize], + [Compile with address sanitizer enabled], + )], + [sanitize=$enableval], [sanitize="no"]) +if test x"$sanitize" = x"yes" +then + CFLAGS="$CFLAGS -fsanitize=address -fsanitize=undefined" + CPPFLAGS="$CPPFLAGS -fsanitize=address -fsanitize=undefined" +fi + +AC_ARG_ENABLE(werror, + [AS_HELP_STRING( + [--enable-werror], + [Turn all compiler warnings into errors, with exceptions: + a) deprecation (allow upstream to mark deprecation without breaking builds); + b) "#warning" pragmas (allow to remind ourselves of errors without breaking builds) + ] + )], + [werror=$enableval], [werror="no"]) +if test x"$werror" = x"yes" +then + WERROR_FLAGS="-Werror" + WERROR_FLAGS+=" -Wno-error=deprecated -Wno-error=deprecated-declarations" + WERROR_FLAGS+=" -Wno-error=cpp" # "#warning" + CFLAGS="$CFLAGS $WERROR_FLAGS" + CPPFLAGS="$CPPFLAGS $WERROR_FLAGS" +fi + +CFLAGS="$CFLAGS -Wall" +CPPFLAGS="$CPPFLAGS -Wall" + +dnl checks for header files +AC_HEADER_STDC +AC_CHECK_HEADERS(execinfo.h sys/select.h sys/socket.h syslog.h ctype.h) + +# The following test is taken from WebKit's webkit.m4 +saved_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -fvisibility=hidden " +AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden]) +AC_COMPILE_IFELSE([AC_LANG_SOURCE([char foo;])], + [ AC_MSG_RESULT([yes]) + SYMBOL_VISIBILITY="-fvisibility=hidden"], + AC_MSG_RESULT([no])) +CFLAGS="$saved_CFLAGS" +AC_SUBST(SYMBOL_VISIBILITY) + +dnl Generate the output +AM_CONFIG_HEADER(config.h) + +AC_CHECK_LIB([m], [main]) +AC_CHECK_LIB([pthread], [main]) + +AC_ARG_WITH([alsa], [AS_HELP_STRING([--with-alsa], [compile with Alsa driver @<:@default=check@:>@]) ], [], [with_alsa="check"]) +AS_IF([test "x$with_alsa" != xno], [PKG_CHECK_MODULES(ALSA, alsa >= 1.0, with_alsa=yes, with_alsa=no)]) +AM_CONDITIONAL(HAVE_ALSA, test "x$with_alsa" == "xyes" ) +AS_IF([test "x$with_alsa" == "xyes"],[AC_MSG_NOTICE( Compiling with Alsa support )], [AC_MSG_NOTICE( Alsa sound card not supported. Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. )]) + +AC_OUTPUT( + src/liboptions/Makefile + src/libdebug/Makefile + src/libsample/Makefile + src/libsamplerate/Makefile + src/libfilter/Makefile + src/libtimer/Makefile + src/libjitter/Makefile + src/libosmocc/Makefile + src/libg711/Makefile + src/libsound/Makefile + src/telephone/Makefile + src/Makefile + Makefile) diff --git a/git-version-gen b/git-version-gen new file mode 100755 index 0000000..42cf3d2 --- /dev/null +++ b/git-version-gen @@ -0,0 +1,151 @@ +#!/bin/sh +# Print a version string. +scriptversion=2010-01-28.01 + +# Copyright (C) 2007-2010 Free Software Foundation, Inc. +# +# 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 3 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, see . + +# This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/. +# It may be run two ways: +# - from a git repository in which the "git describe" command below +# produces useful output (thus requiring at least one signed tag) +# - from a non-git-repo directory containing a .tarball-version file, which +# presumes this script is invoked like "./git-version-gen .tarball-version". + +# In order to use intra-version strings in your project, you will need two +# separate generated version string files: +# +# .tarball-version - present only in a distribution tarball, and not in +# a checked-out repository. Created with contents that were learned at +# the last time autoconf was run, and used by git-version-gen. Must not +# be present in either $(srcdir) or $(builddir) for git-version-gen to +# give accurate answers during normal development with a checked out tree, +# but must be present in a tarball when there is no version control system. +# Therefore, it cannot be used in any dependencies. GNUmakefile has +# hooks to force a reconfigure at distribution time to get the value +# correct, without penalizing normal development with extra reconfigures. +# +# .version - present in a checked-out repository and in a distribution +# tarball. Usable in dependencies, particularly for files that don't +# want to depend on config.h but do want to track version changes. +# Delete this file prior to any autoconf run where you want to rebuild +# files to pick up a version string change; and leave it stale to +# minimize rebuild time after unrelated changes to configure sources. +# +# It is probably wise to add these two files to .gitignore, so that you +# don't accidentally commit either generated file. +# +# Use the following line in your configure.ac, so that $(VERSION) will +# automatically be up-to-date each time configure is run (and note that +# since configure.ac no longer includes a version string, Makefile rules +# should not depend on configure.ac for version updates). +# +# AC_INIT([GNU project], +# m4_esyscmd([build-aux/git-version-gen .tarball-version]), +# [bug-project@example]) +# +# Then use the following lines in your Makefile.am, so that .version +# will be present for dependencies, and so that .tarball-version will +# exist in distribution tarballs. +# +# BUILT_SOURCES = $(top_srcdir)/.version +# $(top_srcdir)/.version: +# echo $(VERSION) > $@-t && mv $@-t $@ +# dist-hook: +# echo $(VERSION) > $(distdir)/.tarball-version + +case $# in + 1) ;; + *) echo 1>&2 "Usage: $0 \$srcdir/.tarball-version"; exit 1;; +esac + +tarball_version_file=$1 +nl=' +' + +# First see if there is a tarball-only version file. +# then try "git describe", then default. +if test -f $tarball_version_file +then + v=`cat $tarball_version_file` || exit 1 + case $v in + *$nl*) v= ;; # reject multi-line output + [0-9]*) ;; + *) v= ;; + esac + test -z "$v" \ + && echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2 +fi + +if test -n "$v" +then + : # use $v +elif + v=`git describe --abbrev=4 --match='v*' HEAD 2>/dev/null \ + || git describe --abbrev=4 HEAD 2>/dev/null` \ + && case $v in + [0-9]*) ;; + v[0-9]*) ;; + *) (exit 1) ;; + esac +then + # Is this a new git that lists number of commits since the last + # tag or the previous older version that did not? + # Newer: v6.10-77-g0f8faeb + # Older: v6.10-g0f8faeb + case $v in + *-*-*) : git describe is okay three part flavor ;; + *-*) + : git describe is older two part flavor + # Recreate the number of commits and rewrite such that the + # result is the same as if we were using the newer version + # of git describe. + vtag=`echo "$v" | sed 's/-.*//'` + numcommits=`git rev-list "$vtag"..HEAD | wc -l` + v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`; + ;; + esac + + # Change the first '-' to a '.', so version-comparing tools work properly. + # Remove the "g" in git describe's output string, to save a byte. + v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`; +else + v=UNKNOWN +fi + +v=`echo "$v" |sed 's/^v//'` + +# Don't declare a version "dirty" merely because a time stamp has changed. +git status > /dev/null 2>&1 + +dirty=`sh -c 'git diff-index --name-only HEAD' 2>/dev/null` || dirty= +case "$dirty" in + '') ;; + *) # Append the suffix only if there isn't one already. + case $v in + *-dirty) ;; + *) v="$v-dirty" ;; + esac ;; +esac + +# Omit the trailing newline, so that m4_esyscmd can use the result directly. +echo "$v" | tr -d '\012' + +# Local variables: +# eval: (add-hook 'write-file-hooks 'time-stamp) +# time-stamp-start: "scriptversion=" +# time-stamp-format: "%:y-%02m-%02d.%02H" +# time-stamp-end: "$" +# End: diff --git a/m4/.keep b/m4/.keep new file mode 100644 index 0000000..e69de29 diff --git a/src/Makefile.am b/src/Makefile.am new file mode 100644 index 0000000..761af8d --- /dev/null +++ b/src/Makefile.am @@ -0,0 +1,21 @@ +AUTOMAKE_OPTIONS = foreign + +SUBDIRS = \ + liboptions \ + libdebug \ + libsample \ + libsamplerate \ + libfilter \ + libtimer \ + libjitter \ + libosmocc \ + libg711 + +if HAVE_ALSA +SUBDIRS += \ + libsound +endif + +SUBDIRS += \ + telephone + diff --git a/src/telephone/Makefile.am b/src/telephone/Makefile.am new file mode 100644 index 0000000..e850614 --- /dev/null +++ b/src/telephone/Makefile.am @@ -0,0 +1,30 @@ +AM_CPPFLAGS = -Wall -Wextra -g $(all_includes) + +bin_PROGRAMS = \ + osmo-cc-alsa-endpoint + +osmo_cc_alsa_endpoint_SOURCES = \ + telephone.c \ + main.c + +osmo_cc_alsa_endpoint_LDADD = \ + $(COMMON_LA) \ + ../libdebug/libdebug.a \ + ../liboptions/liboptions.a \ + ../libsample/libsample.a \ + ../libsamplerate/libsamplerate.a \ + ../libfilter/libfilter.a \ + ../libtimer/libtimer.a \ + ../libjitter/libjitter.a \ + ../libosmocc/libosmocc.a \ + ../libg711/libg711.a \ + -lm + +if HAVE_ALSA +AM_CPPFLAGS += -DHAVE_ALSA + +osmo_cc_alsa_endpoint_LDADD += \ + ../libsound/libsound.a \ + $(ALSA_LIBS) +endif + diff --git a/src/telephone/main.c b/src/telephone/main.c new file mode 100644 index 0000000..8bf604a --- /dev/null +++ b/src/telephone/main.c @@ -0,0 +1,326 @@ +/* osmo-cc-alsa-endpoint main + * + * (C) 2020 by Andreas Eversberg + * All Rights Reserved + * + * 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 3 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, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "../libdebug/debug.h" +#include "../liboptions/options.h" +#include "../libg711/g711.h" +#include "telephone.h" + +telephone_t *telephone_ep = NULL; +int num_kanal = 1; + +static const char *name = "alsa"; +static const char *audiodev = NULL; +static int samplerate = 48000; +static int latency = 50; +static int rt_prio = 1; +static const char *caller_id = ""; +static int early_audio = 0; +static int autoalert = 0, autoanswer = 1; +#define MAX_CC_ARGS 1024 +static int cc_argc = 0; +static const char *cc_argv[MAX_CC_ARGS]; + +static void print_usage(const char *app) +{ + printf("Usage: %s -a hw:, [] [dialing]\n", app); +} + +static void print_help() +{ + /* - - */ + printf(" -h --help\n"); + printf(" This help\n"); + printf(" --config [~/]\n"); + printf(" Give a config file to use. If it starts with '~/', path is at home dir.\n"); + printf(" Each line in config file is one option, '-' or '--' must not be given!\n"); + printf(" -v --verbose | ,[,[,...]] | list\n"); + printf(" Use 'list' to get a list of all levels and categories\n"); + printf(" Verbose level: digit of debug level (default = '%d')\n", debuglevel); + printf(" Verbose level+category: level digit followed by one or more categories\n"); + printf(" -> If no category is specified, all categories are selected\n"); + printf(" -n --name \n"); + printf(" Give name of this interface. It will be sent in each call towards\n"); + printf(" -I --caller-id \n"); + printf(" What caller ID to send on calls made from terminal. (default = '%s')\n", caller_id); + printf(" -A --auto alerting | answer | off\n"); + printf(" An incoming call can be responded automatically with an alerting or an\n"); + printf(" answer, or not be responded automatically. (default = 'answer')\n"); + printf(" -E --early-audio\n"); + printf(" Send early audio when call is not yet connected. Must be used in\n"); + printf(" conjunction with --auto\n"); + printf(" -a --audio-device hw:,\n"); + printf(" Sound card and device number (default = '%s')\n", audiodev); + printf(" -s --samplerate \n"); + printf(" Sample rate of sound device (default = '%d')\n", samplerate); + printf(" -b --buffer \n"); + printf(" How many milliseconds are processed in advance (default = '%d')\n", latency); + printf(" -r --realtime \n"); + printf(" Set prio: 0 to disable, 99 for maximum (default = %d)\n", rt_prio); + printf(" -C --cc \"\" [--cc ...]\n"); + printf(" Pass arguments to Osmo-CC endpoint. Use '-cc help' for description.\n"); +} + +static void add_options(void) +{ + option_add('h', "help", 0); + option_add('v', "verbose", 1); + option_add('n', "name", 1); + option_add('I', "caller-id", 1); + option_add('A', "auto", 1); + option_add('E', "early-audio", 0); + option_add('a', "audio-device", 1); + option_add('s', "samplerate", 1); + option_add('b', "buffer", 1); + option_add('r', "realtime", 1); + option_add('C', "cc", 1); +} + +static int handle_options(int short_option, int argi, char **argv) +{ + int rc; + + switch (short_option) { + case 'h': + print_usage(argv[0]); + print_help(); + return 0; + case 'v': + if (!strcasecmp(argv[argi], "list")) { + debug_list_cat(); + return 0; + } + rc = parse_debug_opt(argv[argi]); + if (rc < 0) { + fprintf(stderr, "Failed to parse debug option, please use -h for help.\n"); + return rc; + } + break; + case 'n': + name = options_strdup(argv[argi]); + break; + case 'I': + caller_id = options_strdup(argv[argi]); + break; + case 'A': + if (!strcasecmp(argv[argi], "alerting")) { + autoalert = 1; + autoanswer = 0; + } else + if (!strcasecmp(argv[argi], "answer")) { + autoalert = 0; + autoanswer = 1; + } else + if (!strcasecmp(argv[argi], "off")) { + autoalert = 0; + autoanswer = 0; + } else { + fprintf(stderr, "Unknown parameter '%s', please use -h for help.\n", argv[argi]); + return -EINVAL; + } + break; + case 'E': + early_audio = 1; + break; + case 'a': + audiodev = options_strdup(argv[argi]); + break; + case 's': + samplerate = atoi(argv[argi]); + break; + case 'b': + latency = atoi(argv[argi]); + break; + case 'r': + rt_prio = atoi(argv[argi]); + break; + case 'C': + if (!strcasecmp(argv[argi], "help")) { + osmo_cc_help(); + return 0; + } + if (cc_argc == MAX_CC_ARGS) { + fprintf(stderr, "Too many osmo-cc args!\n"); + break; + } + cc_argv[cc_argc++] = options_strdup(argv[argi]); + break; + default: + return -EINVAL; + } + return 1; +} + +static int quit = 0; +void sighandler(int sigset) +{ + if (sigset == SIGHUP || sigset == SIGPIPE) + return; + + fprintf(stderr, "\nSignal %d received.\n", sigset); + + quit = 1; +} + +static int get_char() +{ + struct timeval tv = {0, 0}; + fd_set fds; + char c = 0; + int __attribute__((__unused__)) rc; + + FD_ZERO(&fds); + FD_SET(0, &fds); + select(0+1, &fds, NULL, NULL, &tv); + if (FD_ISSET(0, &fds)) { + rc = read(0, &c, 1); + return c; + } else + return -1; +} + +int main(int argc, char *argv[]) +{ + int argi, rc; + const char *dialing = ""; + struct termios term, term_orig; + char c; + + g711_init(); + + telephone_ep = telephone_create(); + if (!telephone_ep) + goto error; + + cc_argv[cc_argc++] = options_strdup("remote auto"); + + /* handle options / config file */ + add_options(); + rc = options_config_file(argc, argv, "~/.osmocom/alsa/alsa.conf", handle_options); + if (rc < 0) + return 0; + argi = options_command_line(argc, argv, handle_options); + if (argi <= 0) + return argi; + + if (argi < argc) + dialing = argv[argi]; + + rc = ui_init(dialing, autoalert, autoanswer); + if (rc) { + PDEBUG(DTEL, DEBUG_ERROR, "UI initializing failed!\n"); + goto error; + } + + rc = telephone_init(telephone_ep, name, caller_id, OSMO_CC_LOCATION_USER, early_audio, audiodev, samplerate, samplerate * latency / 1000); + if (rc) { + PDEBUG(DTEL, DEBUG_ERROR, "Endpoint initializing failed!\n"); + goto error; + } + + rc = osmo_cc_new(&telephone_ep->cc_ep, OSMO_CC_VERSION, name, OSMO_CC_LOCATION_USER, cc_message, NULL, telephone_ep, cc_argc, cc_argv); + if (rc < 0) + goto error; + + /* real time priority */ + if (rt_prio > 0) { + struct sched_param schedp; + int rc; + + memset(&schedp, 0, sizeof(schedp)); + schedp.sched_priority = rt_prio; + rc = sched_setscheduler(0, SCHED_RR, &schedp); + if (rc) + fprintf(stderr, "Error setting SCHED_RR with prio %d\n", rt_prio); + } + + /* prepare terminal */ + tcgetattr(0, &term_orig); + term = term_orig; + term.c_lflag &= ~(ISIG|ICANON|ECHO); + term.c_cc[VMIN]=1; + term.c_cc[VTIME]=2; + tcsetattr(0, TCSANOW, &term); + + signal(SIGINT, sighandler); + signal(SIGHUP, sighandler); + signal(SIGTERM, sighandler); + signal(SIGPIPE, sighandler); + + while (!quit) { + int w; + c = get_char(); + if (c == 3) { + /* quit */ + if (clear_console_text) + clear_console_text(); + printf("CTRL+c received, quitting!\n"); + quit = 1; + continue; + } + process_timer(); + alsa_work(telephone_ep); + rtp_work(telephone_ep); + do { + w = 0; + w |= osmo_cc_handle(); + w |= ui_work(telephone_ep, c); + c = 0; + } while (w); + usleep(1000); + } + + signal(SIGINT, SIG_DFL); + signal(SIGTSTP, SIG_DFL); + signal(SIGHUP, SIG_DFL); + signal(SIGTERM, SIG_DFL); + signal(SIGPIPE, SIG_DFL); + + /* reset terminal */ + tcsetattr(0, TCSANOW, &term_orig); + + /* reset real time prio */ + if (rt_prio > 0) { + struct sched_param schedp; + + memset(&schedp, 0, sizeof(schedp)); + schedp.sched_priority = 0; + sched_setscheduler(0, SCHED_OTHER, &schedp); + } + +error: + if (telephone_ep) { + osmo_cc_delete(&telephone_ep->cc_ep); + telephone_destroy(telephone_ep); + } + + options_free(); + + return 0; +} + diff --git a/src/telephone/telephone.c b/src/telephone/telephone.c new file mode 100644 index 0000000..343efad --- /dev/null +++ b/src/telephone/telephone.c @@ -0,0 +1,849 @@ +/* console handling + * + * (C) 2020 by Andreas Eversberg + * All Rights Reserved + * + * 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 3 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, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "../libdebug/debug.h" +#include "../libsample/sample.h" +#include "../libg711/g711.h" +#include "../libsound/sound.h" +#include "telephone.h" +#include "../libosmocc/helper.h" + +static struct osmo_cc_helper_audio_codecs codecs[] = { + { "PCMA", 8000, 1, g711_encode_alaw, g711_decode_alaw }, + { "PCMU", 8000, 1, g711_encode_ulaw, g711_decode_ulaw }, + { NULL, 0, 0, NULL, NULL}, +}; + +const char *cause_name(int cause) +{ + static char cause_str[16]; + + switch (cause) { + case OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR: + return "hangup"; + case OSMO_CC_ISDN_CAUSE_USER_BUSY: + return "busy"; + case OSMO_CC_ISDN_CAUSE_USER_ALERTING_NA: + return "no-answer"; + case OSMO_CC_ISDN_CAUSE_DEST_OOO: + case OSMO_CC_ISDN_CAUSE_NETWORK_OOO: + return "out-of-order"; + case OSMO_CC_ISDN_CAUSE_INV_NR_FORMAT: + return "invalid-number"; + case OSMO_CC_ISDN_CAUSE_NO_CIRCUIT_CHAN: + return "no-channel"; + case OSMO_CC_ISDN_CAUSE_TEMP_FAILURE: + return "link-failure"; + case OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL: + return "resource-unavail"; + default: + sprintf(cause_str, "cause=%d", cause); + return cause_str; + } + +} + +static char ui_text[256]; +static char ui_clear[256]; +static int ui_autoalert; +static int ui_autoanswer; +static int ui_len = 0; +#define UI_MAX_DIGITS 33 +static char ui_remote_id[256] = ""; /* what we dial or who called us */ +static char ui_remote_dialing[256] = ""; /* what remote called us with */ +static char ui_local_id[256] = ""; /* our ID */ +static const char ui_digits[] = "0123456789*#ABCDE"; +static uint8_t ui_cause = 0; + +static void append_string(char *string, size_t size, char c) +{ + size_t len = strlen(string); + int i; + + /* string full */ + if (len == size - 1) + return; + + for (i = 0; i < (int)strlen(ui_digits); i++) { + if (c == ui_digits[i]) { + string[len] = c; + string[len + 1] = '\0'; + break; + } + } +} + +/* + * Endpoint instance + */ + +/* create interface instance */ +telephone_t *telephone_create(void) +{ + telephone_t *telephone_ep; + + telephone_ep = calloc(1, sizeof(*telephone_ep)); + if (!telephone_ep) { + PDEBUG(DTEL, DEBUG_ERROR, "No memory!\n"); + abort(); + } + + PDEBUG(DTEL, DEBUG_DEBUG, "Telephone instance created\n"); + + return telephone_ep; +} + +static void telephone_close(telephone_t *telephone_ep); +static void call_destroy(call_t *call); + +/* destroy interface instance and free all resource */ +void telephone_destroy(telephone_t *telephone_ep) +{ + /* remove stack instance */ + telephone_close(telephone_ep); + + /* destroy all calls */ + while (telephone_ep->call_list) + call_destroy(telephone_ep->call_list); + + free((char *)telephone_ep->name); + + free(telephone_ep); + + PDEBUG(DTEL, DEBUG_DEBUG, "Telephone instance destroyed\n"); +} + +/* initialization and configuration of interface instance */ +int telephone_init(telephone_t *telephone_ep, const char *name, const char *callerid, uint8_t serving_location, int early_audio, const char *audiodev, int samplerate, int __attribute__((unused)) latspl) +{ + telephone_ep->name = strdup(name); + telephone_ep->serving_location = serving_location; + telephone_ep->early_audio = early_audio; + telephone_ep->samplerate = samplerate; + telephone_ep->latspl = latspl; + telephone_ep->loopback = 0; + strcpy(ui_local_id, callerid); + + if (audiodev) { +#ifdef HAVE_ALSA + /* open sound device for call control */ + /* use factor 1.4 of speech level for complete range of sound card */ + telephone_ep->sound = sound_open(audiodev, NULL, NULL, NULL, 1, 0.0, samplerate, latspl, 1 / (SPEECH_LEVEL * 0.7079), 4000.0, 2.0); + if (!telephone_ep->sound) { + PDEBUG(DTEL, DEBUG_ERROR, "No sound device!\n"); + return -EIO; + } + sound_start(telephone_ep->sound); +#else + PDEBUG(DTEL, DEBUG_ERROR, "No sound card support compiled in!\n"); + return -ENOTSUP; +#endif + } + + return 0; +} + +static void telephone_close(telephone_t *telephone_ep) +{ + if (telephone_ep->sound) { + sound_close(telephone_ep->sound); + telephone_ep->sound = NULL; + } +} + +/* + * call instance + */ + +static const char *call_state_name[] = { + "on hook", + "incoming setup", + "outgoing setup", + "incoming overlap", + "outgoing overlap", + "incoming proceeding", + "outgoing proceeding", + "incoming alerting", + "outgoing alerting", + "connected", + "incoming disconect", + "outgoing disconect", +}; + +static void call_new_state(call_t *call, enum call_state state) +{ + PDEBUG(DTEL, DEBUG_DEBUG, "Call state '%s' -> '%s'\n", call_state_name[call->state], call_state_name[state]); + call->state = state; +} + +static call_t *call_create(telephone_t *telephone_ep) +{ + call_t *call, **call_p; + int rc; + + call = calloc(1, sizeof(*call)); + if (!call) { + PDEBUG(DTEL, DEBUG_ERROR, "No memory!\n"); + abort(); + } + + call_p = &telephone_ep->call_list; + while (*call_p) + call_p = &((*call_p)->next); + *call_p = call; + + call->telephone_ep = telephone_ep; + + /* init sample rate conversion */ + rc = init_samplerate(&call->srstate, 8000.0, (double)telephone_ep->samplerate, 3300.0); + if (rc < 0) + abort(); + + /* allocate jitter buffer */ + rc = jitter_create(&call->dejitter, telephone_ep->samplerate / 10); // FIXME: size + if (rc < 0) + abort(); + + PDEBUG(DTEL, DEBUG_DEBUG, "Created new call instance\n"); + + return call; +} + +static void call_destroy(call_t *call) +{ + call_t **call_p; + + /* free sdp */ + free((char *)call->sdp); + + /* free jitter buffer */ + jitter_destroy(&call->dejitter); + + /* free session description */ + if (call->cc_session) + osmo_cc_free_session(call->cc_session); + + /* detach */ + call_p = &call->telephone_ep->call_list; + while (*call_p) { + if (*call_p == call) + break; + call_p = &((*call_p)->next); + } + *call_p = call->next; + + free(call); + + PDEBUG(DTEL, DEBUG_DEBUG, "destroyed call instance\n"); +} + +/* + * audio handling + */ + +/* take audio from CC and store in jitter buffer */ +void down_audio(struct osmo_cc_session_codec *codec, uint16_t __attribute__((unused)) sequence_number, uint32_t __attribute__((unused)) timestamp, uint8_t *data, int len) +{ + call_t *call = codec->media->session->priv; + int count = len / 2; + sample_t samples[count]; + + if (call->telephone_ep->loopback != 3) { + sample_t up[(int)((double)count * call->srstate.factor + 0.5) + 10]; + int16_to_samples(samples, (int16_t *)data, count); + count = samplerate_upsample(&call->srstate, samples, count, up); + jitter_save(&call->dejitter, up, count); + } +} + +void alsa_work(telephone_t *telephone_ep) +{ + if (!telephone_ep->sound) + return; + +#ifdef HAVE_ALSA + /* handle audio, if sound device is used */ + call_t *call; + sample_t samples[telephone_ep->latspl + 10], *samples_list[1]; + uint8_t *power_list[1]; + int count; + int rc; + + /* hunt for call */ + for (call = telephone_ep->call_list; call; call = call->next) + break; // just any call + + count = sound_get_tosend(telephone_ep->sound, telephone_ep->latspl); + if (count < 0) { + PDEBUG(DTEL, DEBUG_ERROR, "Failed to get samples in buffer (rc = %d)!\n", count); + if (count == -EPIPE) + PDEBUG(DTEL, DEBUG_ERROR, "Trying to recover.\n"); + return; + } + if (count > 0) { + if (call) + jitter_load(&call->dejitter, samples, count); + else + memset(samples, 0, sizeof(*samples) * count); + samples_list[0] = samples; + power_list[0] = NULL; + rc = sound_write(telephone_ep->sound, samples_list, power_list, count, NULL, NULL, 1); + if (rc < 0) { + PDEBUG(DTEL, DEBUG_ERROR, "Failed to write TX data to sound device (rc = %d)\n", rc); + if (rc == -EPIPE) + PDEBUG(DTEL, DEBUG_ERROR, "Trying to recover.\n"); + return; + } + } + samples_list[0] = samples; + count = sound_read(telephone_ep->sound, samples_list, telephone_ep->latspl, 1, NULL); + if (count < 0) { + PDEBUG(DTEL, DEBUG_ERROR, "Failed to read from sound device (rc = %d)!\n", count); + if (count == -EPIPE) + PDEBUG(DTEL, DEBUG_ERROR, "Trying to recover.\n"); + return; + } + if (call && count) { + int i; + + if (telephone_ep->loopback == 3) + jitter_save(&call->dejitter, samples, count); + count = samplerate_downsample(&call->srstate, samples, count); + /* put samples into ring buffer */ + for (i = 0; i < count; i++) { + call->tx_buffer[call->tx_buffer_pos] = samples[i]; + /* if ring buffer wrapps, deliver data down to call process */ + if (++call->tx_buffer_pos == 160) { + call->tx_buffer_pos = 0; + /* only if we have a call */ + if (call->cc_callref && call->codec) { + int16_t data[160]; + samples_to_int16(data, call->tx_buffer, 160); + osmo_cc_rtp_send(call->codec, (uint8_t *)data, 160 * 2, 1, 160); + } + } + } + } + +//printf("%p, %p\n", call, call ? call->codec : NULL); +// if (call && call->codec) +// while (osmo_cc_rtp_receive(call->codec->media) >= 0); +#endif +} + +void rtp_work(telephone_t *telephone_ep) +{ + call_t *call; + + call = telephone_ep->call_list; + while (call) { + if (call->cc_session) + osmo_cc_session_handle(call->cc_session); + call = call->next; + } +} + + +/* + * handle message from CC + */ + +static void release_reject_ind(call_t *call, uint8_t msg_type, uint8_t isdn_cause) +{ + osmo_cc_msg_t *new_msg; + + /* create osmo-cc message */ + new_msg = osmo_cc_new_msg(msg_type); + /* cause */ + osmo_cc_add_ie_cause(new_msg, call->telephone_ep->serving_location, isdn_cause, 0, 0); + /* send message to osmo-cc */ + osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, new_msg); + /* change state */ + call_new_state(call, CALL_STATE_IDLE); + /* destroy call */ + call_destroy(call); +} + +void cc_message(osmo_cc_endpoint_t *ep, uint32_t callref, osmo_cc_msg_t *msg) +{ + telephone_t *telephone_ep = ep->priv; + call_t *call, *other; + osmo_cc_msg_t *new_msg; + uint8_t type, plan, present, screen; + char callerid[128], dialing[128]; + uint8_t coding, location, progress, socket_cause; + uint16_t sip_cause; + int rc; + int i; + + /* hunt for callref */ + call = telephone_ep->call_list; + while (call) { + if (call->cc_callref == callref) + break; + call = call->next; + } + + /* process SETUP */ + if (!call) { + if (msg->type != OSMO_CC_MSG_SETUP_REQ) { + PDEBUG(DTEL, DEBUG_ERROR, "received message without call instance, please fix!\n"); + goto done; + } + /* creating call instance */ + call = call_create(telephone_ep); + if (!call) { + PDEBUG(DTEL, DEBUG_ERROR, "Cannot create calll instance.\n"); + abort(); + } + /* link with cc */ + call->cc_callref = callref; + } + + switch (msg->type) { + case OSMO_CC_MSG_SETUP_REQ: /* dial-out command received from epoint */ + /* hunt for call */ + for (other = telephone_ep->call_list; other; other = other->next) { + if (other != call) + break; + } + if (other) { + release_reject_ind(call, OSMO_CC_MSG_REJ_IND, OSMO_CC_ISDN_CAUSE_USER_BUSY); + break; + } + /* calling */ + rc = osmo_cc_get_ie_calling(msg, 0, &type, &plan, &present, &screen, callerid, sizeof(callerid)); + if (rc >= 0) + strncpy(ui_remote_id, callerid, sizeof(ui_remote_id) - 1); + /* called */ + rc = osmo_cc_get_ie_called(msg, 0, &type, &plan, dialing, sizeof(dialing)); + if (rc >= 0) + strncpy(ui_remote_dialing, dialing, sizeof(ui_remote_dialing) - 1); + PDEBUG(DTEL, DEBUG_INFO, "Incoming call from '%s' to '%s'\n", ui_remote_id, ui_remote_dialing); + /* sdp accept */ + call->sdp = osmo_cc_helper_audio_accept(call, codecs, down_audio, msg, &call->cc_session, &call->codec, 0); + if (!call->sdp) { + release_reject_ind(call, OSMO_CC_MSG_REJ_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL); + break; + } + call->sdp = strdup(call->sdp); + /* change state */ + call_new_state(call, CALL_STATE_IN_SETUP); + if (ui_autoanswer) { + /* create osmo-cc message */ + new_msg = osmo_cc_new_msg(OSMO_CC_MSG_SETUP_CNF); + /* sdp */ + osmo_cc_add_ie_sdp(new_msg, call->sdp); + free((char *)call->sdp); + call->sdp = NULL; + /* send message to osmo-cc */ + osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, new_msg); + /* change state */ + call_new_state(call, CALL_STATE_CONNECT); + } else + if (ui_autoalert) { + /* create osmo-cc message */ + new_msg = osmo_cc_new_msg(OSMO_CC_MSG_ALERT_IND); + /* sdp */ + osmo_cc_add_ie_sdp(new_msg, call->sdp); + free((char *)call->sdp); + call->sdp = NULL; + /* send message to osmo-cc */ + osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, new_msg); + /* change state */ + call_new_state(call, CALL_STATE_IN_ALERTING); + } + break; + case OSMO_CC_MSG_SETUP_ACK_REQ: /* more information is needed */ + rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec); + if (rc < 0) { + release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL); + break; + } + PDEBUG(DTEL, DEBUG_INFO, "Incoming call acknowledged\n"); + /* change state */ + call_new_state(call, CALL_STATE_OUT_OVERLAP); + break; + case OSMO_CC_MSG_PROC_REQ: /* call of endpoint is proceeding */ + rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec); + if (rc < 0) { + release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL); + break; + } + PDEBUG(DTEL, DEBUG_INFO, "Incoming call proceeding\n"); + /* change state */ + call_new_state(call, CALL_STATE_OUT_PROCEEDING); + break; + case OSMO_CC_MSG_ALERT_REQ: /* call of endpoint is ringing */ + rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec); + if (rc < 0) { + release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL); + break; + } + PDEBUG(DTEL, DEBUG_INFO, "Incoming call alerting\n"); + /* change state */ + call_new_state(call, CALL_STATE_OUT_ALERTING); + break; + case OSMO_CC_MSG_SETUP_RSP: /* call of endpoint is connected */ + rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec); + if (rc < 0) { + release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL); + break; + } + PDEBUG(DTEL, DEBUG_INFO, "Incoming call acknowledged\n"); + /* create osmo-cc message */ + new_msg = osmo_cc_new_msg(OSMO_CC_MSG_SETUP_COMP_IND); + /* send message to osmo-cc */ + osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, new_msg); + /* change state */ + call_new_state(call, CALL_STATE_CONNECT); + break; + case OSMO_CC_MSG_SETUP_COMP_REQ: /* call of endpoint is connected */ + break; + case OSMO_CC_MSG_INFO_REQ: /* overlap dialing */ + rc = osmo_cc_get_ie_called(msg, 0, &type, &plan, dialing, sizeof(dialing)); + if (rc < 0) + dialing[0] = '\0'; + PDEBUG(DTEL, DEBUG_INFO, "Incoming call received additional dialing '%s'\n", dialing); + for (i = 0; dialing[i]; i++) { + /* add to dial string */ + append_string(ui_remote_dialing, sizeof(ui_remote_dialing), dialing[i]); + } + break; + case OSMO_CC_MSG_PROGRESS_REQ: /* progress */ + rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec); + if (rc < 0) { + release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL); + break; + } + PDEBUG(DTEL, DEBUG_INFO, "Incoming call received progress\n"); + break; + case OSMO_CC_MSG_NOTIFY_REQ: /* display and notifications */ + break; + case OSMO_CC_MSG_REJ_REQ: /* call has been rejected */ + /* get cause */ + rc = osmo_cc_get_ie_cause(msg, 0, &location, &ui_cause, &sip_cause, &socket_cause); + if (rc < 0) + ui_cause = OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR; + else + PDEBUG(DTEL, DEBUG_INFO, "Incoming call rejected: ISDN cause = %d, SIP cause = %d, socket cause = %d\n", ui_cause, sip_cause, socket_cause); + /* change state */ + call_new_state(call, CALL_STATE_IDLE); + /* destroy call */ + call_destroy(call); + break; + case OSMO_CC_MSG_DISC_REQ: /* call has been disconnected */ + rc = osmo_cc_helper_audio_negotiate(msg, &call->cc_session, &call->codec); + if (rc < 0) { + release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_RESOURCE_UNAVAIL); + break; + } + /* get cause */ + rc = osmo_cc_get_ie_cause(msg, 0, &location, &ui_cause, &sip_cause, &socket_cause); + if (rc < 0) + ui_cause = OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR; + else + PDEBUG(DTEL, DEBUG_INFO, "Disconnect by remote: ISDN cause = %d, SIP cause = %d, socket cause = %d\n", ui_cause, sip_cause, socket_cause); + /* change state */ + call_new_state(call, CALL_STATE_IN_DISCONNECT); + /* progress indicator */ + rc = osmo_cc_get_ie_progress(msg, 0, &coding, &location, &progress); + if (rc < 0 || coding != OSMO_CC_CODING_ITU_T || !(progress == 1 || progress == 8)) { + PDEBUG(DTEL, DEBUG_INFO, "no audio after disconnect, releasing!\n"); + release_reject_ind(call, OSMO_CC_MSG_REL_IND, ui_cause); + } + + break; + case OSMO_CC_MSG_REL_REQ: /* release call */ + /* get cause */ + rc = osmo_cc_get_ie_cause(msg, 0, &location, &ui_cause, &sip_cause, &socket_cause); + if (rc < 0) + ui_cause = OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR; + else + PDEBUG(DTEL, DEBUG_INFO, "Disconnect by remote: ISDN cause = %d, SIP cause = %d, socket cause = %d\n", ui_cause, sip_cause, socket_cause); + /* create osmo-cc message */ + new_msg = osmo_cc_new_msg(OSMO_CC_MSG_REL_CNF); + /* send message to osmo-cc */ + osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, new_msg); + /* change state */ + call_new_state(call, CALL_STATE_IDLE); + /* destroy call */ + call_destroy(call); + break; + default: + PDEBUG(DTEL, DEBUG_ERROR, "received an unsupported CC message: %d\n", msg->type); + } + +done: + osmo_cc_free_msg(msg); +} + +/* + * user interface + */ + + +static void _clear_ui_text(void) +{ + if (!ui_len) + return; + + fwrite(ui_clear, ui_len, 1, stdout); + // note: fflused by user of this function + ui_len = 0; +} + +static void _print_ui_text(void) +{ + if (!ui_len) + return; + + printf("\033[1;37m"); + fwrite(ui_text, ui_len, 1, stdout); + printf("\033[0;39m"); +} + +int ui_init(const char *remote_id, int autoalert, int autoanswer) +{ + clear_console_text = _clear_ui_text; + print_console_text = _print_ui_text; + ui_autoalert = autoalert; + ui_autoanswer = autoanswer; + + strncpy(ui_remote_id, remote_id, sizeof(ui_remote_id) - 1); + ui_remote_id[sizeof(ui_remote_id) - 1] = '\0'; + + return 0; +} + +int ui_work(telephone_t *telephone_ep, int c) +{ + int work = (c > 0) ? 1 : 0; + call_t *call; + osmo_cc_msg_t *msg; + char text[1024] = ""; + char display[UI_MAX_DIGITS + 1]; + int len; + + /* hunt for call */ + for (call = telephone_ep->call_list; call; call = call->next) + break; // just any call + if (!call) { + if (c > 0) { + append_string(ui_remote_id, sizeof(ui_remote_id), c); + if ((c == 8 || c == 127) && strlen(ui_remote_id)) + ui_remote_id[strlen(ui_remote_id) - 1] = '\0'; +dial_after_hangup: + if (c == 'd') { + PDEBUG(DTEL, DEBUG_INFO, "Outgoing call from '%s' to '%s'\n", ui_local_id, ui_remote_id); + ui_remote_dialing[0] = '\0'; + /* creating call instance */ + call = call_create(telephone_ep); + if (!call) { + PDEBUG(DTEL, DEBUG_ERROR, "Cannot create calll instance.\n"); + abort(); + } + + /* setup message */ + msg = osmo_cc_new_msg(OSMO_CC_MSG_SETUP_IND); + /* network type */ + osmo_cc_add_ie_calling_network(msg, OSMO_CC_NETWORK_ALSA_NONE, ""); + /* calling number */ + osmo_cc_add_ie_calling(msg, OSMO_CC_TYPE_UNKNOWN, OSMO_CC_PLAN_TELEPHONY, OSMO_CC_PRESENT_ALLOWED, OSMO_CC_SCREEN_USER_UNSCREENED, ui_local_id); + /* called number */ + osmo_cc_add_ie_called(msg, OSMO_CC_TYPE_UNKNOWN, OSMO_CC_PLAN_TELEPHONY, ui_remote_id); + /* bearer capability */ + osmo_cc_add_ie_bearer(msg, OSMO_CC_CODING_ITU_T, OSMO_CC_CAPABILITY_AUDIO, OSMO_CC_MODE_CIRCUIT); + /* sdp offer */ + call->cc_session = osmo_cc_helper_audio_offer(call, codecs, down_audio, msg, 1); + if (!call->cc_session) { + PDEBUG(DTEL, DEBUG_NOTICE, "Failed to offer audio, call aborted.\n"); + osmo_cc_free_msg(msg); + call_destroy(call); + } else { + /* create new call */ + osmo_cc_call_t *cc_call = osmo_cc_call_new(&call->telephone_ep->cc_ep); + call->cc_callref = cc_call->callref; + /* send message to CC */ + osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg); + /* change state */ + call_new_state(call, CALL_STATE_OUT_SETUP); + } + } + } + memset(display, '.', UI_MAX_DIGITS); + memcpy(display, ui_remote_id, strlen(ui_remote_id)); + display[UI_MAX_DIGITS] = '\0'; + sprintf(text, "%s: %s (press digits 0..9 or d=dial)\r", call_state_name[(call) ? call->state : CALL_STATE_IDLE], display); + goto done; + } + + if (c == 'h' || (c == 'd' && call->state == CALL_STATE_IN_DISCONNECT)) { + PDEBUG(DTEL, DEBUG_INFO, "Call hangup\n"); + /* create osmo-cc message */ + if (call->state == CALL_STATE_IN_SETUP) + release_reject_ind(call, OSMO_CC_MSG_REJ_IND, OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR); + else + release_reject_ind(call, OSMO_CC_MSG_REL_IND, OSMO_CC_ISDN_CAUSE_NORM_CALL_CLEAR); + /* dial new number */ + if (c == 'd') { + call = NULL; + goto dial_after_hangup; + } + goto done; + } + if (c == 'o' && call->state == CALL_STATE_IN_SETUP) { + PDEBUG(DTEL, DEBUG_INFO, "Acknowledge incoming call\n"); + /* create osmo-cc message */ + msg = osmo_cc_new_msg(OSMO_CC_MSG_SETUP_ACK_IND); + if (call->telephone_ep->early_audio && call->sdp) { + /* progress */ + osmo_cc_add_ie_progress(msg, OSMO_CC_CODING_ITU_T, call->telephone_ep->serving_location, OSMO_CC_PROGRESS_INBAND_INFO_AVAILABLE); + /* sdp */ + osmo_cc_add_ie_sdp(msg, call->sdp); + free((char *)call->sdp); + call->sdp = NULL; + } + /* send message to osmo-cc */ + osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg); + /* change state */ + call_new_state(call, CALL_STATE_IN_OVERLAP); + } + if (c == 'p' && (call->state == CALL_STATE_IN_SETUP || call->state == CALL_STATE_IN_OVERLAP)) { + PDEBUG(DTEL, DEBUG_INFO, "Proceeding incoming call\n"); + /* create osmo-cc message */ + msg = osmo_cc_new_msg(OSMO_CC_MSG_PROC_IND); + if (call->telephone_ep->early_audio && call->sdp) { + /* progress */ + osmo_cc_add_ie_progress(msg, OSMO_CC_CODING_ITU_T, call->telephone_ep->serving_location, OSMO_CC_PROGRESS_INBAND_INFO_AVAILABLE); + /* sdp */ + osmo_cc_add_ie_sdp(msg, call->sdp); + free((char *)call->sdp); + call->sdp = NULL; + } + /* send message to osmo-cc */ + osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg); + /* change state */ + call_new_state(call, CALL_STATE_IN_PROCEEDING); + } + if (c == 'a' && (call->state == CALL_STATE_IN_SETUP || call->state == CALL_STATE_IN_OVERLAP || call->state == CALL_STATE_IN_PROCEEDING)) { + PDEBUG(DTEL, DEBUG_INFO, "Alerting incoming call\n"); + /* create osmo-cc message */ + msg = osmo_cc_new_msg(OSMO_CC_MSG_ALERT_IND); + if (call->telephone_ep->early_audio && call->sdp) { + /* progress */ + osmo_cc_add_ie_progress(msg, OSMO_CC_CODING_ITU_T, call->telephone_ep->serving_location, OSMO_CC_PROGRESS_INBAND_INFO_AVAILABLE); + /* sdp */ + osmo_cc_add_ie_sdp(msg, call->sdp); + free((char *)call->sdp); + call->sdp = NULL; + } + /* send message to osmo-cc */ + osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg); + /* change state */ + call_new_state(call, CALL_STATE_IN_ALERTING); + } + if (c == 'c' && (call->state == CALL_STATE_IN_SETUP || call->state == CALL_STATE_IN_OVERLAP || call->state == CALL_STATE_IN_PROCEEDING || call->state == CALL_STATE_IN_ALERTING)) { + PDEBUG(DTEL, DEBUG_INFO, "Answer incoming call\n"); + /* create osmo-cc message */ + msg = osmo_cc_new_msg(OSMO_CC_MSG_SETUP_CNF); + /* sdp */ + if (call->sdp) { + osmo_cc_add_ie_sdp(msg, call->sdp); + free((char *)call->sdp); + call->sdp = NULL; + } + /* send message to osmo-cc */ + osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg); + /* change state */ + call_new_state(call, CALL_STATE_CONNECT); + } + if (c > 0 && call->state == CALL_STATE_OUT_OVERLAP && strchr(ui_digits, c)) { + PDEBUG(DTEL, DEBUG_INFO, "Send digit %c\n", c); + char called[] = { c, '\0' }; + /* create osmo-cc message */ + msg = osmo_cc_new_msg(OSMO_CC_MSG_INFO_IND); + /* add dialing */ + osmo_cc_add_ie_called(msg, OSMO_CC_TYPE_UNKNOWN, OSMO_CC_PLAN_TELEPHONY, called); + /* send message to osmo-cc */ + osmo_cc_ll_msg(&call->telephone_ep->cc_ep, call->cc_callref, msg); + /* add to dial string */ + append_string(ui_remote_id, sizeof(ui_remote_id), c); + } + + /* NOTE: the state is from console view: a call towards CC is OUT and from CC is IN */ + switch (call->state) { + case CALL_STATE_OUT_SETUP: + case CALL_STATE_OUT_PROCEEDING: + case CALL_STATE_OUT_ALERTING: + sprintf(text, "%s: %s (press h=hangup)\r", call_state_name[call->state], ui_remote_id); + break; + case CALL_STATE_OUT_OVERLAP: + sprintf(text, "%s: %s (press digits 0..9 h=hangup)\r", call_state_name[call->state], ui_remote_id); + break; + case CALL_STATE_CONNECT: + if (ui_remote_dialing[0]) + sprintf(text, "%s: %s->%s (press h=hangup)\r", call_state_name[call->state], ui_remote_id, ui_remote_dialing); + else + sprintf(text, "%s: %s (press h=hangup)\r", call_state_name[call->state], ui_remote_id); + break; + case CALL_STATE_IN_DISCONNECT: + sprintf(text, "%s: %s (press h=hangup d=redial)\r", call_state_name[call->state], cause_name(ui_cause)); + break; + case CALL_STATE_IN_SETUP: + sprintf(text, "%s: %s->%s (press o=overlap p=proceeding a=alerting c=connect h=hangup)\r", call_state_name[call->state], ui_remote_id, ui_remote_dialing); + break; + case CALL_STATE_IN_OVERLAP: + sprintf(text, "%s: %s->%s (press p=proceeding a=alerting c=connect h=hangup)\r", call_state_name[call->state], ui_remote_id, ui_remote_dialing); + break; + case CALL_STATE_IN_PROCEEDING: + sprintf(text, "%s: %s->%s (press a=alerting c=connect h=hangup)\r", call_state_name[call->state], ui_remote_id, ui_remote_dialing); + break; + case CALL_STATE_IN_ALERTING: + sprintf(text, "%s: %s->%s (press c=connect h=hangup)\r", call_state_name[call->state], ui_remote_id, ui_remote_dialing); + break; + default: + break; + } + +done: + /* skip if nothing has changed */ + len = strlen(text); + if (ui_len == len && !memcmp(ui_text, text, len)) + return work; + clear_console_text(); + ui_len = len; + memcpy(ui_text, text, len); + memset(ui_clear, ' ', len - 1); + ui_clear[len - 1] = '\r'; + print_console_text(); + fflush(stdout); + + return work; +} + diff --git a/src/telephone/telephone.h b/src/telephone/telephone.h new file mode 100644 index 0000000..4c7dfa0 --- /dev/null +++ b/src/telephone/telephone.h @@ -0,0 +1,75 @@ + +#include "../libtimer/timer.h" +#include "../libosmocc/endpoint.h" +#include "../libsample/sample.h" +#include "../libsamplerate/samplerate.h" +#include "../libjitter/jitter.h" + +enum call_state { + CALL_STATE_IDLE = 0, /* no call */ + CALL_STATE_IN_SETUP, /* incoming connection */ + CALL_STATE_OUT_SETUP, /* outgoing connection */ + CALL_STATE_IN_OVERLAP, /* more informatiopn needed */ + CALL_STATE_OUT_OVERLAP, /* more informatiopn needed */ + CALL_STATE_IN_PROCEEDING,/* call is proceeding */ + CALL_STATE_OUT_PROCEEDING,/* call is proceeding */ + CALL_STATE_IN_ALERTING, /* call is ringing */ + CALL_STATE_OUT_ALERTING,/* call is ringing */ + CALL_STATE_CONNECT, /* call is connected and transmission is enabled */ + CALL_STATE_IN_DISCONNECT,/* incoming disconnected */ + CALL_STATE_OUT_DISCONNECT,/* outgoing disconnected */ +}; + +struct telephone; + +struct call_list; + +typedef struct telephone { + osmo_cc_endpoint_t cc_ep; + struct call_list *call_list; + const char *name; + + /* settings */ + int serving_location; /* who we serve when sending causes towards interface */ + int early_audio; + + /* sound */ + int loopback; + int samplerate; /* sample rate of headphone interface */ + int latspl; + void *sound; /* headphone interface */ + +} telephone_t; + +typedef struct call_list { + struct call_list *next; + telephone_t *telephone_ep; + + /* alsa states */ + + /* osmo-cc states */ + uint32_t cc_callref; + const char *sdp; + osmo_cc_session_t *cc_session; + osmo_cc_session_codec_t *codec; + int codec_negotiated; + + /* call states */ + enum call_state state; + + /* audio states */ + jitter_t dejitter; + samplerate_t srstate; + sample_t tx_buffer[160]; /* transmit audio buffer */ + int tx_buffer_pos; /* current position in transmit audio buffer */ +} call_t; + +void telephone_destroy(telephone_t *telephone_ep); +telephone_t *telephone_create(void); +int telephone_init(telephone_t *telephone_ep, const char *name, const char *callerid, uint8_t serving_location, int early_audio, const char *audiodev, int samplerate, int __attribute__((unused)) latspl); +void cc_message(osmo_cc_endpoint_t *ep, uint32_t callref, osmo_cc_msg_t *msg); +int ui_init(const char *remote_id, int autoalert, int autoanswer); +int ui_work(telephone_t *telephone_ep, int c); +void alsa_work(telephone_t *telephone_ep); +void rtp_work(telephone_t *telephone_ep); +