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