90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2006, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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* \brief General Asterisk channel definitions for image handling
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*/
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#ifndef _ASTERISK_IMAGE_H
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#define _ASTERISK_IMAGE_H
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/*! \brief structure associated with registering an image format */
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struct ast_imager {
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char *name; /*!< Name */
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char *desc; /*!< Description */
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char *exts; /*!< Extension(s) (separated by '|' ) */
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struct ast_format *format; /*!< Image format */
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struct ast_frame *(*read_image)(int fd, int len); /*!< Read an image from a file descriptor */
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int (*identify)(int fd); /*!< Identify if this is that type of file */
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int (*write_image)(int fd, struct ast_frame *frame); /*!< Returns length written */
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AST_LIST_ENTRY(ast_imager) list; /*!< For linked list */
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};
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/*!
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* \brief Check for image support on a channel
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* \param chan channel to check
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* Checks the channel to see if it supports the transmission of images
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* \return non-zero if image transmission is supported
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*/
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int ast_supports_images(struct ast_channel *chan);
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/*!
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* \brief Sends an image
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* \param chan channel to send image on
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* \param filename filename of image to send (minus extension)
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* Sends an image on the given channel.
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* \retval 0 on success
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* \retval -1 on error
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*/
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int ast_send_image(struct ast_channel *chan, const char *filename);
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/*!
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* \brief Make an image
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* \param filename filename of image to prepare
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* \param preflang preferred language to get the image...?
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* \param format the format of the file, NULL for any image format
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* Make an image from a filename ??? No estoy positivo
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* \retval an ast_frame on success
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* \retval NULL on failure
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*/
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struct ast_frame *ast_read_image(const char *filename, const char *preflang, struct ast_format *format);
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/*!
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* \brief Register image format
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* \param imgdrv Populated ast_imager structure with info to register
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* Registers an image format
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* \return 0 regardless
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*/
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int ast_image_register(struct ast_imager *imgdrv);
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/*!
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* \brief Unregister an image format
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* \param imgdrv pointer to the ast_imager structure you wish to unregister
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* Unregisters the image format passed in.
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*/
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void ast_image_unregister(struct ast_imager *imgdrv);
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/*!
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* \brief Initialize image stuff
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* Initializes all the various image stuff. Basically just registers the cli stuff
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* \return 0 all the time
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*/
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int ast_image_init(void);
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#endif /* _ASTERISK_IMAGE_H */
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