aboutsummaryrefslogtreecommitdiffstats
path: root/apps/app_mp3.c
blob: a7e53cff214b3ce5ad87723f78bebf822332a852 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
/*
 * Asterisk -- A telephony toolkit for Linux.
 *
 * Silly application to play an MP3 file -- uses mpg123
 * 
 * Copyright (C) 1999, Mark Spencer
 *
 * Mark Spencer <markster@linux-support.net>
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License
 */
 
#include <asterisk/file.h>
#include <asterisk/logger.h>
#include <asterisk/channel.h>
#include <asterisk/frame.h>
#include <asterisk/pbx.h>
#include <asterisk/module.h>
#include <asterisk/translate.h>
#include <string.h>
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <pthread.h>
#include <sys/time.h>

#define MPG_123 "/usr/bin/mpg123"

static char *tdesc = "Silly MP3 Application";

static char *app = "MP3Player";

STANDARD_LOCAL_USER;

LOCAL_USER_DECL;

static int mp3play(char *filename, int fd)
{
	int res;
	res = fork();
	if (res < 0) 
		ast_log(LOG_WARNING, "Fork failed\n");
	if (res)
		return res;
	dup2(fd, STDOUT_FILENO);
	/* Execute mpg123, but buffer if it's a net connection */
	if (strncmp(filename, "http://", 7)) 
	    execl(MPG_123, MPG_123, "-q", "-s", "-b", "1024", "--mono", "-r", "8000", filename, NULL);
	else
	    execl(MPG_123, MPG_123, "-q", "-s", "--mono", "-r", "8000", filename, NULL);
	ast_log(LOG_WARNING, "Execute of mpg123 failed\n");
	return -1;
}

static int mp3_exec(struct ast_channel *chan, void *data)
{
	int res=0;
	struct localuser *u;
	struct ast_channel *trans;
	int fds[2];
	int rfds[2];
	int ms = -1;
	int pid;
	int us;
	struct timeval tv;
	struct timeval last;
	struct ast_frame *f;
	struct myframe {
		struct ast_frame f;
		char offset[AST_FRIENDLY_OFFSET];
		char frdata[160];
	} myf;
	last.tv_usec = 0;
	last.tv_sec = 0;
	if (!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;
	}
	LOCAL_USER_ADD(u);
	ast_stopstream(chan);
	if (chan->format & AST_FORMAT_SLINEAR)
		trans = chan;
	else
		trans = ast_translator_create(chan, AST_FORMAT_SLINEAR, AST_DIRECTION_OUT);
	if (trans) {
		res = mp3play((char *)data, fds[1]);
		if (res >= 0) {
			pid = res;
			/* Order is important -- there's almost always going to be mp3...  we want to prioritize the
			   user */
			rfds[0] = trans->fd;
			rfds[1] = fds[0];
			for (;;) {
				CHECK_BLOCKING(trans);
				res = ast_waitfor_n_fd(rfds, 2, &ms);
				trans->blocking = 0;
				if (res < 1) {
					ast_log(LOG_DEBUG, "Hangup detected\n");
					res = -1;
					break;
				} else if (res == trans->fd) {
					f = ast_read(trans);
					if (!f) {
						ast_log(LOG_DEBUG, "Null frame == hangup() detected\n");
						res = -1;
						break;
					}
					if (f->frametype == AST_FRAME_DTMF) {
						ast_log(LOG_DEBUG, "User pressed a key\n");
						ast_frfree(f);
						res = 0;
						break;
					}
					ast_frfree(f);
				} else if (res == fds[0]) {
					gettimeofday(&tv, NULL);
					if (last.tv_sec || last.tv_usec) {
						/* We should wait at least a frame length */
						us = sizeof(myf.frdata) / 16 * 1000;
						/* Subtract 1,000,000 us for each second late we've passed */
						us -= (tv.tv_sec - last.tv_sec) * 1000000;
						/* And one for each us late we've passed */
						us -= (tv.tv_usec - last.tv_usec);
						/* Sleep that long if needed */
						if (us > 0)
							usleep(us);
					}
					last = tv;
					res = read(fds[0], myf.frdata, sizeof(myf.frdata));
					if (res > 0) {
						myf.f.frametype = AST_FRAME_VOICE;
						myf.f.subclass = AST_FORMAT_SLINEAR;
						myf.f.datalen = res;
						myf.f.timelen = res / 16;
						myf.f.mallocd = 0;
						myf.f.offset = AST_FRIENDLY_OFFSET;
						myf.f.src = __PRETTY_FUNCTION__;
						myf.f.data = myf.frdata;
						if (ast_write(trans, &myf.f) < 0) {
							res = -1;
							break;
						}
					} else {
						ast_log(LOG_DEBUG, "No more mp3\n");
						res = 0;
					}
				} else {
					ast_log(LOG_DEBUG, "HuhHHH?\n");
					res = -1;
					break;
				}
			}
			kill(pid, SIGTERM);
		}
		if (trans != chan) 
			ast_translator_destroy(trans);
	} else 
		ast_log(LOG_WARNING, "No translator channel available\n");
	close(fds[0]);
	close(fds[1]);
	LOCAL_USER_REMOVE(u);
	return res;
}

int unload_module(void)
{
	STANDARD_HANGUP_LOCALUSERS;
	return ast_unregister_application(app);
}

int load_module(void)
{
	return ast_register_application(app, mp3_exec);
}

char *description(void)
{
	return tdesc;
}

int usecount(void)
{
	int res;
	STANDARD_USECOUNT(res);
	return res;
}