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00032 #include "asterisk.h"
00033
00034 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 209838 $")
00035
00036 #include <stdlib.h>
00037 #include <stdio.h>
00038 #include <string.h>
00039 #include <unistd.h>
00040 #include <errno.h>
00041 #include <limits.h>
00042
00043 #include "asterisk/lock.h"
00044 #include "asterisk/file.h"
00045 #include "asterisk/logger.h"
00046 #include "asterisk/channel.h"
00047 #include "asterisk/pbx.h"
00048 #include "asterisk/module.h"
00049 #include "asterisk/utils.h"
00050 #include "asterisk/indications.h"
00051
00052 static char *app = "Milliwatt";
00053
00054 static char *synopsis = "Generate a Constant 1004Hz tone at 0dbm (mu-law)";
00055
00056 static char *descrip =
00057 " Milliwatt([options]): Generate a Constant 1004Hz tone at 0dbm.\n"
00058 "Previous versions of this application generated the tone at 1000Hz. If for\n"
00059 "some reason you would prefer that behavior, supply the 'o' option to get the\n"
00060 "old behavior.\n"
00061 "";
00062
00063
00064 static char digital_milliwatt[] = {0x1e,0x0b,0x0b,0x1e,0x9e,0x8b,0x8b,0x9e} ;
00065
00066 static void *milliwatt_alloc(struct ast_channel *chan, void *params)
00067 {
00068 return ast_calloc(1, sizeof(int));
00069 }
00070
00071 static void milliwatt_release(struct ast_channel *chan, void *data)
00072 {
00073 free(data);
00074 return;
00075 }
00076
00077 static int milliwatt_generate(struct ast_channel *chan, void *data, int len, int samples)
00078 {
00079 unsigned char buf[AST_FRIENDLY_OFFSET + 640];
00080 const int maxsamples = sizeof (buf) / sizeof (buf[0]);
00081 int i, *indexp = (int *) data;
00082 struct ast_frame wf = {
00083 .frametype = AST_FRAME_VOICE,
00084 .subclass = AST_FORMAT_ULAW,
00085 .offset = AST_FRIENDLY_OFFSET,
00086 .data = buf + AST_FRIENDLY_OFFSET,
00087 .src = __FUNCTION__,
00088 };
00089
00090
00091
00092
00093
00094
00095
00096 if (samples > maxsamples) {
00097 ast_log(LOG_WARNING, "Only doing %d samples (%d requested)\n", maxsamples, samples);
00098 samples = maxsamples;
00099 }
00100
00101 len = samples * sizeof (buf[0]);
00102 wf.datalen = len;
00103 wf.samples = samples;
00104
00105
00106 for (i = 0; i < len; i++) {
00107 buf[AST_FRIENDLY_OFFSET + i] = digital_milliwatt[(*indexp)++];
00108 *indexp &= 7;
00109 }
00110
00111 if (ast_write(chan,&wf) < 0) {
00112 ast_log(LOG_WARNING,"Failed to write frame to '%s': %s\n",chan->name,strerror(errno));
00113 return -1;
00114 }
00115
00116 return 0;
00117 }
00118
00119 static struct ast_generator milliwattgen = {
00120 alloc: milliwatt_alloc,
00121 release: milliwatt_release,
00122 generate: milliwatt_generate,
00123 };
00124
00125 static int old_milliwatt_exec(struct ast_channel *chan)
00126 {
00127 ast_set_write_format(chan, AST_FORMAT_ULAW);
00128 ast_set_read_format(chan, AST_FORMAT_ULAW);
00129
00130 if (chan->_state != AST_STATE_UP) {
00131 ast_answer(chan);
00132 }
00133
00134 if (ast_activate_generator(chan,&milliwattgen,"milliwatt") < 0) {
00135 ast_log(LOG_WARNING,"Failed to activate generator on '%s'\n",chan->name);
00136 return -1;
00137 }
00138
00139 while (!ast_safe_sleep(chan, 10000))
00140 ;
00141
00142 ast_deactivate_generator(chan);
00143
00144 return -1;
00145 }
00146
00147 static int milliwatt_exec(struct ast_channel *chan, void *data)
00148 {
00149 const char *options = data;
00150 struct ast_module_user *u;
00151 int res = -1;
00152
00153 u = ast_module_user_add(chan);
00154
00155 if (!ast_strlen_zero(options) && strchr(options, 'o')) {
00156 res = old_milliwatt_exec(chan);
00157 goto exit_app;
00158 }
00159
00160 res = ast_playtones_start(chan, 23255, "1004/1000", 0);
00161
00162 while (!res) {
00163 res = ast_safe_sleep(chan, 10000);
00164 }
00165
00166 res = 0;
00167
00168 exit_app:
00169 ast_module_user_remove(u);
00170
00171 return res;
00172 }
00173
00174 static int unload_module(void)
00175 {
00176 int res;
00177
00178 res = ast_unregister_application(app);
00179
00180 ast_module_user_hangup_all();
00181
00182 return res;
00183 }
00184
00185 static int load_module(void)
00186 {
00187 return ast_register_application(app, milliwatt_exec, synopsis, descrip);
00188 }
00189
00190 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Digital Milliwatt (mu-law) Test Application");