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Last updated: Sat Feb 3 05:00:53 2007

Asterisk developer's documentation :: Codename Pineapple

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res_convert.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2005, 2006, Digium, Inc.
 *
 * redice li <redice_li@yahoo.com>
 * Russell Bryant <russell@digium.com>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 * 
 * \brief file format conversion CLI command using Asterisk formats and translators
 *
 * \author redice li <redice_li@yahoo.com>
 * \author Russell Bryant <russell@digium.com>
 *
 */ 

#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision: 48776 $")

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "asterisk/channel.h"
#include "asterisk/logger.h"
#include "asterisk/module.h"
#include "asterisk/cli.h"
#include "asterisk/file.h"

/*! \brief Split the filename to basename and extension */
static int split_ext(char *filename, char **name, char **ext)
{
   *name = *ext = filename;
   
   strsep(ext, ".");

   if (ast_strlen_zero(*name) || ast_strlen_zero(*ext))
      return -1;

   return 0;
}

/*! \brief Convert a file from one format to another */
static int cli_audio_convert(int fd, int argc, char *argv[])
{
   int ret = RESULT_FAILURE;
   struct ast_filestream *fs_in = NULL, *fs_out = NULL;
   struct ast_frame *f;
   struct timeval start;
   int cost;
   char *file_in = NULL, *file_out = NULL;
   char *name_in, *ext_in, *name_out, *ext_out;
   
   /* ugly, can be removed when CLI entries have ast_module pointers */
   ast_module_ref(ast_module_info->self);

   if (argc != 4 || ast_strlen_zero(argv[2]) || ast_strlen_zero(argv[3])) {
      ret = RESULT_SHOWUSAGE;
      goto fail_out; 
   }

   file_in = ast_strdupa(argv[2]);
   file_out = ast_strdupa(argv[3]);

   if (split_ext(file_in, &name_in, &ext_in)) {
      ast_cli(fd, "'%s' is an invalid filename!\n", argv[2]);
      goto fail_out;
   }
   if (!(fs_in = ast_readfile(name_in, ext_in, NULL, O_RDONLY, 0, 0))) {
      ast_cli(fd, "Unable to open input file: %s\n", argv[2]);
      goto fail_out;
   }
   
   if (split_ext(file_out, &name_out, &ext_out)) {
      ast_cli(fd, "'%s' is an invalid filename!\n", argv[3]);
      goto fail_out;
   }
   if (!(fs_out = ast_writefile(name_out, ext_out, NULL, O_CREAT|O_TRUNC|O_WRONLY, 0, AST_FILE_MODE))) {
      ast_cli(fd, "Unable to open output file: %s\n", argv[3]);
      goto fail_out;
   }

   start = ast_tvnow();
   
   while ((f = ast_readframe(fs_in))) {
      if (ast_writestream(fs_out, f)) {
         ast_cli(fd, "Failed to convert %s.%s to %s.%s!\n", name_in, ext_in, name_out, ext_out);
         goto fail_out;
      }
   }

   cost = ast_tvdiff_ms(ast_tvnow(), start);
   ast_cli(fd, "Converted %s.%s to %s.%s in %dms\n", name_in, ext_in, name_out, ext_out, cost);
   ret = RESULT_SUCCESS;

fail_out:
   if (fs_out) {
      ast_closestream(fs_out);
      if (ret != RESULT_SUCCESS)
         ast_filedelete(name_out, ext_out);
   }

   if (fs_in) 
      ast_closestream(fs_in);

   ast_module_unref(ast_module_info->self);

   return ret;
}

static char usage_audio_convert[] =
"Usage: file convert <file_in> <file_out>\n"
"    Convert from file_in to file_out. If an absolute path is not given, the\n"
"default Asterisk sounds directory will be used.\n\n"
"Example:\n"
"    file convert tt-weasels.gsm tt-weasels.ulaw\n";

static struct ast_cli_entry cli_convert[] = {
   { { "file", "convert" , NULL },
   cli_audio_convert, "Convert audio file",
   usage_audio_convert },
};

static int unload_module(void)
{
   ast_cli_unregister_multiple(cli_convert, sizeof(cli_convert) / sizeof(struct ast_cli_entry));
   return 0;
}

static int load_module(void)
{
   ast_cli_register_multiple(cli_convert, sizeof(cli_convert) / sizeof(struct ast_cli_entry));
   return 0;
}

AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "File format conversion CLI command");

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