/* * Asterisk -- An open source telephony toolkit. * * Copyright (C) 1999 - 2005, Digium, Inc. * * Mark Spencer <markster@digium.com> * * See http://www.asterisk.org for more information about * the Asterisk project. Please do not directly contact * any of the maintainers of this project for assistance; * the project provides a web site, mailing lists and IRC * channels for your use. * * This program is free software, distributed under the terms of * the GNU General Public License Version 2. See the LICENSE file * at the top of the source tree. */ /*! \file * * \brief Silly application to play an MP3 file -- uses mpg123 * * \author Mark Spencer <markster@digium.com> * * \note Add feature to play local M3U playlist file * Vincent Li <mchun.li@gmail.com> * * \ingroup applications */ /*** MODULEINFO <support_level>extended</support_level> ***/ #include "asterisk.h" #include <sys/time.h> #include <sys/types.h> #include <signal.h> #include "asterisk/lock.h" #include "asterisk/file.h" #include "asterisk/channel.h" #include "asterisk/frame.h" #include "asterisk/pbx.h" #include "asterisk/module.h" #include "asterisk/translate.h" #include "asterisk/app.h" #include "asterisk/format_cache.h" #define LOCAL_MPG_123 "/usr/local/bin/mpg123" #define MPG_123 "/usr/bin/mpg123" /*** DOCUMENTATION <application name="MP3Player" language="en_US"> <synopsis> Play an MP3 file or M3U playlist file or stream. </synopsis> <syntax> <parameter name="Location" required="true"> <para>Location of the file to be played. (argument passed to mpg123)</para> </parameter> </syntax> <description> <para>Executes mpg123 to play the given location, which typically would be a mp3 filename or m3u playlist filename or a URL. Please read https://en.wikipedia.org/wiki/M3U to see what the M3U playlist file format is like.</para> <para>Note that mpg123 does not support HTTPS, so use HTTP for web streams.</para> <para>User can exit by pressing any key on the dialpad, or by hanging up.</para> <example title="Play an MP3 playlist"> exten => 1234,1,MP3Player(/var/lib/asterisk/playlist.m3u) </example> <para>This application does not automatically answer and should be preceeded by an application such as Answer() or Progress().</para> </description> </application> ***/ static char *app = "MP3Player"; static int mp3play(const char *filename, unsigned int sampling_rate, int fd) { int res; char sampling_rate_str[8]; res = ast_safe_fork(0); if (res < 0) ast_log(LOG_WARNING, "Fork failed\n"); if (res) { return res; } if (ast_opt_high_priority) ast_set_priority(0); dup2(fd, STDOUT_FILENO); ast_close_fds_above_n(STDERR_FILENO); snprintf(sampling_rate_str, 8, "%u", sampling_rate); /* Execute mpg123, but buffer if it's a net connection */ if (!strncasecmp(filename, "http://", 7) && strstr(filename, ".m3u")) { char buffer_size_str[8]; snprintf(buffer_size_str, 8, "%u", (int) 0.5*2*sampling_rate/1000); /* 0.5 seconds for a live stream */ /* Most commonly installed in /usr/local/bin */ execl(LOCAL_MPG_123, "mpg123", "-e", "s16", "-q", "-s", "-b", buffer_size_str, "-f", "8192", "--mono", "-r", sampling_rate_str, "-@", filename, (char *)NULL); /* But many places has it in /usr/bin */ execl(MPG_123, "mpg123", "-e", "s16", "-q", "-s", "-b", buffer_size_str, "-f", "8192", "--mono", "-r", sampling_rate_str, "-@", filename, (char *)NULL); /* As a last-ditch effort, try to use PATH */ execlp("mpg123", "mpg123", "-e", "s16", "-q", "-s", "-b", buffer_size_str, "-f", "8192", "--mono", "-r", sampling_rate_str, "-@", filename, (char *)NULL); } else if (!strncasecmp(filename, "http://", 7)) { char buffer_size_str[8]; snprintf(buffer_size_str, 8, "%u", 6*2*sampling_rate/1000); /* 6 seconds for a remote MP3 file */ /* Most commonly installed in /usr/local/bin */ execl(LOCAL_MPG_123, "mpg123", "-e", "s16", "-q", "-s", "-b", buffer_size_str, "-f", "8192", "--mono", "-r", sampling_rate_str, filename, (char *)NULL); /* But many places has it in /usr/bin */ execl(MPG_123, "mpg123", "-e", "s16", "-q", "-s", "-b", buffer_size_str, "-f", "8192", "--mono", "-r", sampling_rate_str, filename, (char *)NULL); /* As a last-ditch effort, try to use PATH */ execlp("mpg123", "mpg123", "-e", "s16", "-q", "-s", "-b", buffer_size_str, "-f", "8192", "--mono", "-r", sampling_rate_str, filename, (char *)NULL); } else if (strstr(filename, ".m3u")) { /* Most commonly installed in /usr/local/bin */ execl(LOCAL_MPG_123, "mpg123", "-e", "s16", "-q", "-z", "-s", "-f", "8192", "--mono", "-r", sampling_rate_str, "-@", filename, (char *)NULL); /* But many places has it in /usr/bin */ execl(MPG_123, "mpg123", "-e", "s16", "-q", "-z", "-s", "-f", "8192", "--mono", "-r", sampling_rate_str, "-@", filename, (char *)NULL); /* As a last-ditch effort, try to use PATH */ execlp("mpg123", "mpg123", "-e", "s16", "-q", "-z", "-s", "-f", "8192", "--mono", "-r", sampling_rate_str, "-@", filename, (char *)NULL); } else { /* Most commonly installed in /usr/local/bin */ execl(MPG_123, "mpg123", "-e", "s16", "-q", "-s", "-f", "8192", "--mono", "-r", sampling_rate_str, filename, (char *)NULL); /* But many places has it in /usr/bin */ execl(LOCAL_MPG_123, "mpg123", "-e", "s16", "-q", "-s", "-f", "8192", "--mono", "-r", sampling_rate_str, filename, (char *)NULL); /* As a last-ditch effort, try to use PATH */ execlp("mpg123", "mpg123", "-e", "s16", "-q", "-s", "-f", "8192", "--mono", "-r", sampling_rate_str, filename, (char *)NULL); } /* Can't use ast_log since FD's are closed */ fprintf(stderr, "Execute of mpg123 failed\n"); _exit(0); } static int timed_read(int fd, void *data, int datalen, int timeout, int pid) { int res; int i; struct pollfd fds[1]; fds[0].fd = fd; fds[0].events = POLLIN; for (i = 0; i < timeout; i++) { res = ast_poll(fds, 1, 1000); if (res > 0) { break; } else if (res == 0) { /* is mpg123 still running? */ kill(pid, 0); if (errno == ESRCH) { return -1; } } else { ast_log(LOG_NOTICE, "error polling mpg123: %s\n", strerror(errno)); return -1; } } if (i == timeout) { ast_log(LOG_NOTICE, "Poll timed out.\n"); return -1; } return read(fd, data, datalen); } static int mp3_exec(struct ast_channel *chan, const char *data) { int res=0; int fds[2]; int ms = -1; int pid = -1; RAII_VAR(struct ast_format *, owriteformat, NULL, ao2_cleanup); int timeout = 2; int startedmp3 = 0; struct timeval next; struct ast_frame *f; struct myframe { struct ast_frame f; char offset[AST_FRIENDLY_OFFSET]; short frdata[160]; } myf = { .f = { 0, }, }; struct ast_format * native_format; unsigned int sampling_rate; struct ast_format * write_format; if (ast_strlen_zero(data)) { ast_log(LOG_WARNING, "MP3 Playback requires an argument (filename)\n"); return -1; } if (pipe(fds)) { ast_log(LOG_WARNING, "Unable to create pipe\n"); return -1; } ast_stopstream(chan); native_format = ast_format_cap_get_format(ast_channel_nativeformats(chan), 0); sampling_rate = ast_format_get_sample_rate(native_format); write_format = ast_format_cache_get_slin_by_rate(sampling_rate); owriteformat = ao2_bump(ast_channel_writeformat(chan)); res = ast_set_write_format(chan, write_format); if (res < 0) { ast_log(LOG_WARNING, "Unable to set write format to signed linear\n"); return -1; } myf.f.frametype = AST_FRAME_VOICE; myf.f.subclass.format = write_format; myf.f.mallocd = 0; myf.f.offset = AST_FRIENDLY_OFFSET; myf.f.src = __PRETTY_FUNCTION__; myf.f.delivery.tv_sec = 0; myf.f.delivery.tv_usec = 0; myf.f.data.ptr = myf.frdata; res = mp3play(data, sampling_rate, fds[1]); if (!strncasecmp(data, "http://", 7)) { timeout = 10; } /* Wait 1000 ms first */ next = ast_tvnow(); next.tv_sec += 1; if (res >= 0) { pid = res; /* Order is important -- there's almost always going to be mp3... we want to prioritize the user */ for (;;) { ms = ast_tvdiff_ms(next, ast_tvnow()); if (ms <= 0) { res = timed_read(fds[0], myf.frdata, sizeof(myf.frdata), timeout, pid); if (res > 0) { myf.f.datalen = res; myf.f.samples = res / 2; startedmp3 = 1; if (ast_write(chan, &myf.f) < 0) { res = -1; break; } } else { ast_debug(1, "No more mp3\n"); if (!startedmp3) { /* we couldn't do anything, which means this stream doesn't work */ if (!strncasecmp(data, "https://", 8)) { ast_log(LOG_WARNING, "%s() does not support HTTPS streams. Use HTTP instead.\n", app); } ast_log(LOG_WARNING, "MP3 stream '%s' is broken or nonexistent\n", data); } res = 0; break; } next = ast_tvadd(next, ast_samp2tv(myf.f.samples, sampling_rate)); } else { ms = ast_waitfor(chan, ms); if (ms < 0) { ast_debug(1, "Hangup detected\n"); res = -1; break; } if (ms) { f = ast_read(chan); if (!f) { ast_debug(1, "Null frame == hangup() detected\n"); res = -1; break; } if (f->frametype == AST_FRAME_DTMF) { ast_debug(1, "User pressed a key\n"); ast_frfree(f); res = 0; break; } ast_frfree(f); } } } } close(fds[0]); close(fds[1]); if (pid > -1) kill(pid, SIGKILL); if (!res && owriteformat) ast_set_write_format(chan, owriteformat); ast_frfree(&myf.f); return res; } static int unload_module(void) { return ast_unregister_application(app); } static int load_module(void) { return ast_register_application_xml(app, mp3_exec); } AST_MODULE_INFO_STANDARD_EXTENDED(ASTERISK_GPL_KEY, "Silly MP3 Application");