app_record.c File Reference

Trivial application to record a sound file. More...

#include "asterisk.h"
#include "asterisk/file.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/app.h"
#include "asterisk/channel.h"
#include "asterisk/dsp.h"
#include "asterisk/format_cache.h"
#include "asterisk/paths.h"

Include dependency graph for app_record.c:

Go to the source code of this file.

Macros
#define	OPERATOR_KEY   '0'

Enumerations
enum	{   OPTION_APPEND = (1 << 0) , OPTION_NOANSWER = (1 << 1) , OPTION_QUIET = (1 << 2) , OPTION_SKIP = (1 << 3) ,   OPTION_STAR_TERMINATE = (1 << 4) , OPTION_IGNORE_TERMINATE = (1 << 5) , OPTION_KEEP = (1 << 6) , OPTION_ANY_TERMINATE = (1 << 7) ,   OPTION_OPERATOR_EXIT = (1 << 8) , OPTION_NO_TRUNCATE = (1 << 9) }
enum	dtmf_response { RESPONSE_NO_MATCH = 0 , RESPONSE_OPERATOR , RESPONSE_DTMF }

Functions
static void	__reg_module (void)
static void	__unreg_module (void)
struct ast_module *	AST_MODULE_SELF_SYM (void)
static int	create_destination_directory (const char *path)
static int	load_module (void)
static enum dtmf_response	record_dtmf_response (struct ast_channel *chan, struct ast_flags *flags, int dtmf_integer, int terminator)
static int	record_exec (struct ast_channel *chan, const char *data)
static int	unload_module (void)

Variables
static struct ast_module_info	__mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Trivial Record Application" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, .support_level = AST_MODULE_SUPPORT_CORE, }
static char *	app = "Record"
static const struct ast_app_option	app_opts [128] = { [ 'a' ] = { .flag = OPTION_APPEND }, [ 'k' ] = { .flag = OPTION_KEEP }, [ 'n' ] = { .flag = OPTION_NOANSWER }, [ 'o' ] = { .flag = OPTION_OPERATOR_EXIT }, [ 'q' ] = { .flag = OPTION_QUIET }, [ 's' ] = { .flag = OPTION_SKIP }, [ 't' ] = { .flag = OPTION_STAR_TERMINATE }, [ 'u' ] = { .flag = OPTION_NO_TRUNCATE }, [ 'y' ] = { .flag = OPTION_ANY_TERMINATE }, [ 'x' ] = { .flag = OPTION_IGNORE_TERMINATE }, }
static const struct ast_module_info *	ast_module_info = &__mod_info

Detailed Description

Trivial application to record a sound file.

Author

Matthew Fredrickson cresl.nosp@m.in@d.nosp@m.igium.nosp@m..com

Definition in file app_record.c.

Macro Definition Documentation

OPERATOR_KEY

#define OPERATOR_KEY   '0'

Definition at line 126 of file app_record.c.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
OPTION_APPEND
OPTION_NOANSWER
OPTION_QUIET
OPTION_SKIP
OPTION_STAR_TERMINATE
OPTION_IGNORE_TERMINATE
OPTION_KEEP
OPTION_ANY_TERMINATE
OPTION_OPERATOR_EXIT
OPTION_NO_TRUNCATE

Definition at line 130 of file app_record.c.

     {
    OPTION_APPEND = (1 << 0),
    OPTION_NOANSWER = (1 << 1),
    OPTION_QUIET = (1 << 2),
    OPTION_SKIP = (1 << 3),
    OPTION_STAR_TERMINATE = (1 << 4),
    OPTION_IGNORE_TERMINATE = (1 << 5),
    OPTION_KEEP = (1 << 6),
    OPTION_ANY_TERMINATE = (1 << 7),
    OPTION_OPERATOR_EXIT = (1 << 8),
    OPTION_NO_TRUNCATE = (1 << 9),
};

dtmf_response

enum dtmf_response

Enumerator
RESPONSE_NO_MATCH
RESPONSE_OPERATOR
RESPONSE_DTMF

Definition at line 143 of file app_record.c.

                   {
    RESPONSE_NO_MATCH = 0,
    RESPONSE_OPERATOR,
    RESPONSE_DTMF,
};

Function Documentation

__reg_module()

static void __reg_module ( void  )

static

Definition at line 546 of file app_record.c.

__unreg_module()

static void __unreg_module ( void  )

static

Definition at line 546 of file app_record.c.

AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM

(

void

)

Definition at line 546 of file app_record.c.

create_destination_directory()

static int create_destination_directory ( const char *  path )

static

Definition at line 190 of file app_record.c.

{
    int res;
    char directory[PATH_MAX], *file_sep;
 
    if (!(file_sep = strrchr(path, '/'))) {
        /* No directory to create */
        return 0;
    }
 
    /* Overwrite temporarily */
    *file_sep = '\0';
 
    /* Absolute path? */
    if (path[0] == '/') {
        res = ast_mkdir(path, 0777);
        *file_sep = '/';
        return res;
    }
 
    /* Relative path */
    res = snprintf(directory, sizeof(directory), "%s/sounds/%s",
                   ast_config_AST_DATA_DIR, path);
 
    *file_sep = '/';
 
    if (res >= sizeof(directory)) {
        /* We truncated, so we fail */
        return -1;
    }
 
    return ast_mkdir(directory, 0777);
}

References ast_config_AST_DATA_DIR, ast_mkdir(), and PATH_MAX.

Referenced by record_exec().

load_module()

static int load_module ( void  )

static

Definition at line 541 of file app_record.c.

{
    return ast_register_application_xml(app, record_exec);
}

References app, ast_register_application_xml, and record_exec().

record_dtmf_response()

static enum dtmf_response record_dtmf_response ( struct ast_channel *  chan, struct ast_flags *  flags, int  dtmf_integer, int  terminator  )

static

Definition at line 174 of file app_record.c.

{
    if ((dtmf_integer == OPERATOR_KEY) &&
        (ast_test_flag(flags, OPTION_OPERATOR_EXIT))) {
        return RESPONSE_OPERATOR;
    }
 
    if ((dtmf_integer == terminator) ||
        (ast_test_flag(flags, OPTION_ANY_TERMINATE))) {
        return RESPONSE_DTMF;
    }
 
    return RESPONSE_NO_MATCH;
}

References ast_test_flag, OPERATOR_KEY, OPTION_ANY_TERMINATE, OPTION_OPERATOR_EXIT, RESPONSE_DTMF, RESPONSE_NO_MATCH, and RESPONSE_OPERATOR.

Referenced by record_exec().

record_exec()

static int record_exec ( struct ast_channel *  chan, const char *  data  )

static

Definition at line 224 of file app_record.c.

{
    int res = 0;
    char *ext = NULL, *opts[0];
    char *parse;
    int i = 0;
    char tmp[PATH_MAX];
 
    struct ast_filestream *s = NULL;
    struct ast_frame *f = NULL;
 
    struct ast_dsp *sildet = NULL;      /* silence detector dsp */
    int totalsilence = 0;
    int dspsilence = 0;
    int silence = 0;        /* amount of silence to allow */
    int gotsilence = 0;     /* did we timeout for silence? */
    int truncate_silence = 1;   /* truncate on complete silence recording */
    int maxduration = 0;        /* max duration of recording in milliseconds */
    int gottimeout = 0;     /* did we timeout for maxduration exceeded? */
    int terminator = '#';
    RAII_VAR(struct ast_format *, rfmt, NULL, ao2_cleanup);
    int ioflags;
    struct ast_silence_generator *silgen = NULL;
    struct ast_flags flags = { 0, };
    AST_DECLARE_APP_ARGS(args,
        AST_APP_ARG(filename);
        AST_APP_ARG(silence);
        AST_APP_ARG(maxduration);
        AST_APP_ARG(options);
    );
    int ms;
    struct timeval start;
    const char *status_response = "ERROR";
 
    /* The next few lines of code parse out the filename and header from the input string */
    if (ast_strlen_zero(data)) { /* no data implies no filename or anything is present */
        ast_log(LOG_WARNING, "Record requires an argument (filename)\n");
        pbx_builtin_setvar_helper(chan, "RECORD_STATUS", "ERROR");
        return -1;
    }
 
    parse = ast_strdupa(data);
    AST_STANDARD_APP_ARGS(args, parse);
    if (args.argc == 4)
        ast_app_parse_options(app_opts, &flags, opts, args.options);
 
    if (!ast_strlen_zero(args.filename)) {
        ext = strrchr(args.filename, '.'); /* to support filename with a . in the filename, not format */
        if (!ext)
            ext = strchr(args.filename, ':');
        if (ext) {
            *ext = '\0';
            ext++;
        }
    }
    if (!ext) {
        ast_log(LOG_WARNING, "No extension specified to filename!\n");
        pbx_builtin_setvar_helper(chan, "RECORD_STATUS", "ERROR");
        return -1;
    }
    if (args.silence) {
        if ((sscanf(args.silence, "%30d", &i) == 1) && (i > -1)) {
            silence = i * 1000;
        } else if (!ast_strlen_zero(args.silence)) {
            ast_log(LOG_WARNING, "'%s' is not a valid silence duration\n", args.silence);
        }
    }
 
    if (ast_test_flag(&flags, OPTION_NO_TRUNCATE))
        truncate_silence = 0;
 
    if (args.maxduration) {
        if ((sscanf(args.maxduration, "%30d", &i) == 1) && (i > -1))
            /* Convert duration to milliseconds */
            maxduration = i * 1000;
        else if (!ast_strlen_zero(args.maxduration))
            ast_log(LOG_WARNING, "'%s' is not a valid maximum duration\n", args.maxduration);
    }
 
    if (ast_test_flag(&flags, OPTION_STAR_TERMINATE))
        terminator = '*';
    if (ast_test_flag(&flags, OPTION_IGNORE_TERMINATE))
        terminator = '\0';
 
    /*
      If a '%d' is specified as part of the filename, we replace that token with
      sequentially incrementing numbers until we find a unique filename.
    */
    if (strchr(args.filename, '%')) {
        size_t src, dst, count = 0;
        size_t src_len = strlen(args.filename);
        size_t dst_len = sizeof(tmp) - 1;
 
        do {
            for (src = 0, dst = 0; src < src_len && dst < dst_len; src++) {
                if (!strncmp(&args.filename[src], "%d", 2)) {
                    int s = snprintf(&tmp[dst], PATH_MAX - dst, "%zu", count);
                    if (s >= PATH_MAX - dst) {
                        /* We truncated, so we need to bail */
                        ast_log(LOG_WARNING, "Failed to create unique filename from template: %s\n", args.filename);
                        pbx_builtin_setvar_helper(chan, "RECORD_STATUS", "ERROR");
                        return -1;
                    }
                    dst += s;
                    src++;
                } else {
                    tmp[dst] = args.filename[src];
                    tmp[++dst] = '\0';
                }
            }
            count++;
        } while (ast_fileexists(tmp, ext, ast_channel_language(chan)) > 0);
    } else
        ast_copy_string(tmp, args.filename, sizeof(tmp));
 
    pbx_builtin_setvar_helper(chan, "RECORDED_FILE", tmp);
 
    if (ast_channel_state(chan) != AST_STATE_UP) {
        if (ast_test_flag(&flags, OPTION_SKIP)) {
            /* At the user's option, skip if the line is not up */
            pbx_builtin_setvar_helper(chan, "RECORD_STATUS", "SKIP");
            return 0;
        } else if (!ast_test_flag(&flags, OPTION_NOANSWER)) {
            /* Otherwise answer unless we're supposed to record while on-hook */
            res = ast_answer(chan);
        }
    }
 
    if (res) {
        ast_log(LOG_WARNING, "Could not answer channel '%s'\n", ast_channel_name(chan));
        status_response = "ERROR";
        goto out;
    }
 
    if (!ast_test_flag(&flags, OPTION_QUIET)) {
        /* Some code to play a nice little beep to signify the start of the record operation */
        res = ast_streamfile(chan, "beep", ast_channel_language(chan));
        if (!res) {
            res = ast_waitstream(chan, "");
        } else {
            ast_log(LOG_WARNING, "ast_streamfile(beep) failed on %s\n", ast_channel_name(chan));
            res = 0;
        }
        ast_stopstream(chan);
    }
 
    /* The end of beep code.  Now the recording starts */
 
    if (silence > 0) {
        rfmt = ao2_bump(ast_channel_readformat(chan));
        res = ast_set_read_format(chan, ast_format_slin);
        if (res < 0) {
            ast_log(LOG_WARNING, "Unable to set to linear mode, giving up\n");
            pbx_builtin_setvar_helper(chan, "RECORD_STATUS", "ERROR");
            return -1;
        }
        sildet = ast_dsp_new();
        if (!sildet) {
            ast_log(LOG_WARNING, "Unable to create silence detector :(\n");
            pbx_builtin_setvar_helper(chan, "RECORD_STATUS", "ERROR");
            return -1;
        }
        ast_dsp_set_threshold(sildet, ast_dsp_get_threshold_from_settings(THRESHOLD_SILENCE));
    }
 
    if (create_destination_directory(tmp)) {
        ast_log(LOG_WARNING, "Could not create directory for file %s\n", args.filename);
        status_response = "ERROR";
        goto out;
    }
 
    ioflags = ast_test_flag(&flags, OPTION_APPEND) ? O_CREAT|O_APPEND|O_WRONLY : O_CREAT|O_TRUNC|O_WRONLY;
    s = ast_writefile(tmp, ext, NULL, ioflags, 0, AST_FILE_MODE);
 
    if (!s) {
        ast_log(LOG_WARNING, "Could not create file %s\n", args.filename);
        status_response = "ERROR";
        goto out;
    }
 
    if (ast_opt_transmit_silence)
        silgen = ast_channel_start_silence_generator(chan);
 
    /* Request a video update */
    ast_indicate(chan, AST_CONTROL_VIDUPDATE);
 
    if (maxduration <= 0)
        maxduration = -1;
 
    start = ast_tvnow();
    while ((ms = ast_remaining_ms(start, maxduration))) {
        ms = ast_waitfor(chan, ms);
        if (ms < 0) {
            break;
        }
 
        if (maxduration > 0 && ms == 0) {
            break;
        }
 
        f = ast_read(chan);
        if (!f) {
            res = -1;
            break;
        }
        if (f->frametype == AST_FRAME_VOICE) {
            res = ast_writestream(s, f);
 
            if (res) {
                ast_log(LOG_WARNING, "Problem writing frame\n");
                ast_frfree(f);
                status_response = "ERROR";
                break;
            }
 
            if (silence > 0) {
                dspsilence = 0;
                ast_dsp_silence(sildet, f, &dspsilence);
                if (dspsilence) {
                    totalsilence = dspsilence;
                } else {
                    totalsilence = 0;
                }
                if (totalsilence > silence) {
                    /* Ended happily with silence */
                    ast_frfree(f);
                    gotsilence = 1;
                    status_response = "SILENCE";
                    break;
                }
            }
        } else if (f->frametype == AST_FRAME_VIDEO) {
            res = ast_writestream(s, f);
 
            if (res) {
                ast_log(LOG_WARNING, "Problem writing frame\n");
                status_response = "ERROR";
                ast_frfree(f);
                break;
            }
        } else if (f->frametype == AST_FRAME_DTMF) {
            enum dtmf_response rc =
                record_dtmf_response(chan, &flags, f->subclass.integer, terminator);
            switch(rc)  {
            case RESPONSE_NO_MATCH:
                break;
            case RESPONSE_OPERATOR:
                status_response = "OPERATOR";
                ast_debug(1, "Got OPERATOR\n");
                break;
            case RESPONSE_DTMF:
                status_response = "DTMF";
                ast_debug(1, "Got DTMF\n");
                break;
            }
            if (rc != RESPONSE_NO_MATCH) {
                ast_frfree(f);
                break;
            }
        }
        ast_frfree(f);
    }
 
    if (maxduration > 0 && !ms) {
        gottimeout = 1;
        status_response = "TIMEOUT";
    }
 
    if (!f) {
        ast_debug(1, "Got hangup\n");
        res = -1;
        status_response = "HANGUP";
        if (!ast_test_flag(&flags, OPTION_KEEP)) {
            ast_filedelete(args.filename, NULL);
        }
    }
 
    if (gotsilence && truncate_silence) {
        ast_stream_rewind(s, silence - 1000);
        ast_truncstream(s);
    } else if (!gottimeout && f) {
        /*
         * Strip off the last 1/4 second of it, if we didn't end because of a timeout,
         * or a hangup.  This must mean we ended because of a DTMF tone and while this
         * 1/4 second stripping is very old code the most likely explanation is that it
         * relates to stripping a partial DTMF tone.
         */
        ast_stream_rewind(s, 250);
        ast_truncstream(s);
    }
    ast_closestream(s);
 
    if (silgen)
        ast_channel_stop_silence_generator(chan, silgen);
 
out:
    if ((silence > 0) && rfmt) {
        res = ast_set_read_format(chan, rfmt);
        if (res) {
            ast_log(LOG_WARNING, "Unable to restore read format on '%s'\n", ast_channel_name(chan));
        }
    }
 
    if (sildet) {
        ast_dsp_free(sildet);
    }
 
    pbx_builtin_setvar_helper(chan, "RECORD_STATUS", status_response);
 
    return res;
}

References ao2_bump, ao2_cleanup, app_opts, args, ast_answer(), AST_APP_ARG, ast_app_parse_options(), ast_channel_language(), ast_channel_name(), ast_channel_readformat(), ast_channel_start_silence_generator(), ast_channel_stop_silence_generator(), ast_closestream(), AST_CONTROL_VIDUPDATE, ast_copy_string(), ast_debug, AST_DECLARE_APP_ARGS, ast_dsp_free(), ast_dsp_get_threshold_from_settings(), ast_dsp_new(), ast_dsp_set_threshold(), ast_dsp_silence(), AST_FILE_MODE, ast_filedelete(), ast_fileexists(), ast_format_slin, AST_FRAME_DTMF, AST_FRAME_VIDEO, AST_FRAME_VOICE, ast_frfree, ast_indicate(), ast_log, ast_opt_transmit_silence, ast_read(), ast_remaining_ms(), ast_set_read_format(), AST_STANDARD_APP_ARGS, AST_STATE_UP, ast_stopstream(), ast_strdupa, ast_stream_rewind(), ast_streamfile(), ast_strlen_zero(), ast_test_flag, ast_truncstream(), ast_tvnow(), ast_waitfor(), ast_waitstream(), ast_writefile(), ast_writestream(), create_destination_directory(), ext, ast_flags::flags, ast_frame::frametype, ast_frame_subclass::integer, LOG_WARNING, NULL, OPTION_APPEND, OPTION_IGNORE_TERMINATE, OPTION_KEEP, OPTION_NO_TRUNCATE, OPTION_NOANSWER, OPTION_QUIET, OPTION_SKIP, OPTION_STAR_TERMINATE, options, out, PATH_MAX, pbx_builtin_setvar_helper(), RAII_VAR, record_dtmf_response(), RESPONSE_DTMF, RESPONSE_NO_MATCH, RESPONSE_OPERATOR, ast_frame::subclass, THRESHOLD_SILENCE, and ast_dsp::totalsilence.

Referenced by load_module().

unload_module()

static int unload_module ( void  )

static

Definition at line 536 of file app_record.c.

{
    return ast_unregister_application(app);
}

References app, and ast_unregister_application().

Variable Documentation

__mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Trivial Record Application" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, .support_level = AST_MODULE_SUPPORT_CORE, }

static

Definition at line 546 of file app_record.c.

app

char* app = "Record"

static

Definition at line 128 of file app_record.c.

Referenced by load_module(), and unload_module().

app_opts

const struct ast_app_option app_opts[128] = { [ 'a' ] = { .flag = OPTION_APPEND }, [ 'k' ] = { .flag = OPTION_KEEP }, [ 'n' ] = { .flag = OPTION_NOANSWER }, [ 'o' ] = { .flag = OPTION_OPERATOR_EXIT }, [ 'q' ] = { .flag = OPTION_QUIET }, [ 's' ] = { .flag = OPTION_SKIP }, [ 't' ] = { .flag = OPTION_STAR_TERMINATE }, [ 'u' ] = { .flag = OPTION_NO_TRUNCATE }, [ 'y' ] = { .flag = OPTION_ANY_TERMINATE }, [ 'x' ] = { .flag = OPTION_IGNORE_TERMINATE }, }

static

Definition at line 160 of file app_record.c.

Referenced by record_exec().

ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info

static

Definition at line 546 of file app_record.c.