path: root/net/asterisk10/files/patch-apps::app_txfax.c

--- apps/app_txfax.c.orig	Fri Jun 17 21:13:05 2005
+++ apps/app_txfax.c	Fri Jun 17 21:00:43 2005
@@ -0,0 +1,289 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Trivial application to send a TIFF file as a FAX
+ * 
+ * Copyright (C) 2003, Steve Underwood
+ *
+ * Steve Underwood <steveu@coppice.org>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+ 
+#include <asterisk/lock.h>
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/channel.h>
+#include <asterisk/pbx.h>
+#include <asterisk/module.h>
+#include <asterisk/translate.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <pthread.h>
+#include <errno.h>
+#include <tiffio.h>
+
+#include <spandsp.h>
+
+static char *tdesc = "Trivial FAX Transmit Application";
+
+static char *app = "TxFAX";
+
+static char *synopsis = "Send a FAX file";
+
+static char *descrip = 
+"  TxFAX(filename[|caller][|debug]):  Send a given TIFF file to the channel as a FAX.\n"
+"The \"caller\" option makes the application behave as a calling machine,\n"
+"rather than the answering machine. The default behaviour is to behave as\n"
+"an answering machine.\n"
+"Uses LOCALSTATIONID to identify itself to the remote end.\n"
+"     LOCALHEADERINFO to generate a header line on each page.\n"
+"Sets REMOTESTATIONID to the receiver CSID.\n"
+"Returns -1 when the user hangs up, or if the file does not exist.\n"
+"Returns 0 otherwise.\n";
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+#define MAX_BLOCK_SIZE 240
+
+static void t30_flush(t30_state_t *s, int which)
+{
+    //TODO:
+}
+/*- End of function --------------------------------------------------------*/
+
+static void phase_e_handler(t30_state_t *s, void *user_data, int result)
+{
+    struct ast_channel *chan;
+    char far_ident[21];
+    
+    chan = (struct ast_channel *) user_data;
+    if (result)
+    {
+        fax_get_far_ident(s, far_ident);
+        pbx_builtin_setvar_helper(chan, "REMOTESTATIONID", far_ident);
+    }
+    else
+    {
+        ast_log(LOG_DEBUG, "==============================================================================\n");
+        ast_log(LOG_DEBUG, "Fax send not successful.\n");
+        ast_log(LOG_DEBUG, "==============================================================================\n");
+    }
+}
+/*- End of function --------------------------------------------------------*/
+
+static int txfax_exec(struct ast_channel *chan, void *data)
+{
+    int res = 0;
+    char source_file[256];
+    char *x;
+    char *s;
+    char *t;
+    char *v;
+    int option;
+    int len;
+    t30_state_t fax;
+    int calling_party;
+    int verbose;
+    int samples;
+    
+    struct localuser *u;
+    struct ast_frame *inf = NULL;
+    struct ast_frame outf;
+
+    int original_read_fmt;
+    int original_write_fmt;
+    
+    uint8_t __buf[sizeof(uint16_t)*MAX_BLOCK_SIZE + 2*AST_FRIENDLY_OFFSET];
+    uint8_t *buf = __buf + AST_FRIENDLY_OFFSET;
+
+    if (chan == NULL)
+    {
+        ast_log(LOG_WARNING, "Fax transmit channel is NULL. Giving up.\n");
+        return -1;
+    }
+
+    /* The next few lines of code parse out the filename and header from the input string */
+    if (data == NULL)
+    {
+        /* No data implies no filename or anything is present */
+        ast_log(LOG_WARNING, "Txfax requires an argument (filename)\n");
+        return -1;
+    }
+    
+    calling_party = FALSE;
+    verbose = FALSE;
+    source_file[0] = '\0'; 
+
+    for (option = 0, v = s = data;  v;  option++, s++)
+    {
+        t = s;
+        v = strchr(s, '|');
+        s = (v)  ?  v  :  s + strlen(s);
+        strncpy(buf, t, s - t);
+        buf[s - t] = '\0';
+        if (option == 0)
+        {
+            /* The first option is always the file name */
+            len = s - t;
+            if (len > 255)
+                len = 255;
+            strncpy(source_file, t, len);
+            source_file[len] = '\0';
+        }
+        else if (strncmp("caller", t, s - t) == 0)
+        {
+            calling_party = TRUE;
+        }
+        else if (strncmp("debug", t, s - t) == 0)
+        {
+            verbose = TRUE;
+        }
+    }
+
+    /* Done parsing */
+
+    LOCAL_USER_ADD(u);
+
+    if (chan->_state != AST_STATE_UP)
+    {
+        /* Shouldn't need this, but checking to see if channel is already answered
+         * Theoretically asterisk should already have answered before running the app */
+        res = ast_answer(chan);
+    }
+    
+    if (!res)
+    {
+        original_read_fmt = chan->readformat;
+        if (original_read_fmt != AST_FORMAT_SLINEAR)
+        {
+            res = ast_set_read_format(chan, AST_FORMAT_SLINEAR);
+            if (res < 0)
+            {
+                ast_log(LOG_WARNING, "Unable to set to linear read mode, giving up\n");
+                return -1;
+            }
+        }
+        original_write_fmt = chan->writeformat;
+        if (original_write_fmt != AST_FORMAT_SLINEAR)
+        {
+            res = ast_set_write_format(chan, AST_FORMAT_SLINEAR);
+            if (res < 0)
+            {
+                ast_log(LOG_WARNING, "Unable to set to linear write mode, giving up\n");
+                res = ast_set_read_format(chan, original_read_fmt);
+                if (res)
+                    ast_log(LOG_WARNING, "Unable to restore read format on '%s'\n", chan->name);
+                return -1;
+            }
+        }
+        fax_init(&fax, calling_party, NULL);
+        fax.verbose = verbose;
+
+        x = pbx_builtin_getvar_helper(chan, "LOCALSTATIONID");
+        if (x  &&  x[0])
+            fax_set_local_ident(&fax, x);
+        x = pbx_builtin_getvar_helper(chan, "LOCALHEADERINFO");
+        if (x  &&  x[0])
+            fax_set_header_info(&fax, x);
+        fax_set_tx_file(&fax, source_file);
+        //fax_set_phase_b_handler(&fax, phase_b_handler, chan);
+        //fax_set_phase_d_handler(&fax, phase_d_handler, chan);
+        fax_set_phase_e_handler(&fax, phase_e_handler, chan);
+        while (ast_waitfor(chan, -1) > -1)
+        {
+            inf = ast_read(chan);
+            if (inf == NULL)
+            {
+                res = -1;
+                break;
+            }
+            if (inf->frametype == AST_FRAME_VOICE)
+            {
+                if (fax_rx_process(&fax, inf->data, inf->samples))
+                    break;
+                samples = (inf->samples <= MAX_BLOCK_SIZE)  ?  inf->samples  :  MAX_BLOCK_SIZE;
+                len = fax_tx_process(&fax, (int16_t *) &buf[AST_FRIENDLY_OFFSET], samples);
+                if (len)
+                {
+                    memset(&outf, 0, sizeof(outf));
+                    outf.frametype = AST_FRAME_VOICE;
+                    outf.subclass = AST_FORMAT_SLINEAR;
+                    outf.datalen = len*sizeof(int16_t);
+                    outf.samples = len;
+                    outf.data = &buf[AST_FRIENDLY_OFFSET];
+                    outf.offset = AST_FRIENDLY_OFFSET;
+                    if (ast_write(chan, &outf) < 0)
+                    {
+                        ast_log(LOG_WARNING, "Unable to write frame to channel; %s\n", strerror(errno));
+                        break;
+                    }
+                }
+            }
+            ast_frfree(inf);
+        }
+        if (inf == NULL)
+        {
+            ast_log(LOG_DEBUG, "Got hangup\n");
+            res = -1;
+        }
+        if (original_read_fmt != AST_FORMAT_SLINEAR)
+        {
+            res = ast_set_read_format(chan, original_read_fmt);
+            if (res)
+                ast_log(LOG_WARNING, "Unable to restore read format on '%s'\n", chan->name);
+        }
+        if (original_write_fmt != AST_FORMAT_SLINEAR)
+        {
+            res = ast_set_write_format(chan, original_write_fmt);
+            if (res)
+                ast_log(LOG_WARNING, "Unable to restore write format on '%s'\n", chan->name);
+        }
+    }
+    else
+    {
+        ast_log(LOG_WARNING, "Could not answer channel '%s'\n", chan->name);
+    }
+    LOCAL_USER_REMOVE(u);
+    return res;
+}
+/*- End of function --------------------------------------------------------*/
+
+int unload_module(void)
+{
+    STANDARD_HANGUP_LOCALUSERS;
+    return ast_unregister_application(app);
+}
+/*- End of function --------------------------------------------------------*/
+
+int load_module(void)
+{
+    return ast_register_application(app, txfax_exec, synopsis, descrip);
+}
+/*- End of function --------------------------------------------------------*/
+
+char *description(void)
+{
+    return tdesc;
+}
+/*- End of function --------------------------------------------------------*/
+
+int usecount(void)
+{
+    int res;
+
+    STANDARD_USECOUNT(res);
+    return res;
+}
+/*- End of function --------------------------------------------------------*/
+
+char *key(void)
+{
+    return ASTERISK_GPL_KEY;
+}
+/*- End of function --------------------------------------------------------*/
+/*- End of file ------------------------------------------------------------*/