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/* $Id$ */
/*
* Copyright (C) 2014-2015 Teluu Inc. (http://www.teluu.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __PJMEDIA_VIDEODEV_UTIL_H__
#define __PJMEDIA_VIDEODEV_UTIL_H__
#include <pjmedia/converter.h>
#include <pjmedia/format.h>
#include <pjmedia/types.h>
/*
* Video device utility functions to resize and rotate video frames.
*/
typedef struct pjmedia_vid_dev_conv
{
pjmedia_converter *conv;
pjmedia_format fmt;
pjmedia_rect_size src_size;
pjmedia_rect_size dst_size;
pjmedia_rect_size res_size; /* Size after resizing */
pjmedia_orient rotation;
pjmedia_rect_size rot_size; /* Size after rotation */
void *conv_buf;
pj_size_t src_frame_size;
pj_size_t conv_frame_size;
pj_bool_t fit_to_h;
pj_bool_t handle_rotation;
pj_bool_t maintain_aspect_ratio;
pj_bool_t match_src_dst;
pj_int32_t pad;
pj_size_t wxh;
} pjmedia_vid_dev_conv;
/**
* Create converter.
* The process:
* frame --> resize --> rotate --> center
* (if handle_rotation (if maintain_aspect_ratio
* == PJ_TRUE) == PJ_TRUE)
*
* handle_rotation will specify whether the converter will need to do the
* rotation as well. If PJ_FALSE, the video device will handle the rotation
* and pass the already-rotated frame.
*
* maintain_aspect_ratio defines whether aspect ratio should be maintained
* when rotating the image.
* If PJ_TRUE, a frame of size w x h will be resized and rotated to
* a new frame of size new_w x new_h (new_h and new_h have the same
* aspect ratio as w x h). Then the new frame will be centered-fit into
* the original frame with black area inserted to fill the gaps.
* Disabling this setting will only resize the frame of size w x h to h x w,
* and then rotate it to fit the original size of w x h. It will achieve
* a slightly faster performance but the resulting image will be stretched.
* The feature to maintain aspect ratio is only supported for certain formats
* (currently, only if fmt.id equals to I420).
*/
pj_status_t
pjmedia_vid_dev_conv_create_converter(pjmedia_vid_dev_conv *conv,
pj_pool_t *pool,
pjmedia_format *fmt,
pjmedia_rect_size src_size,
pjmedia_rect_size dst_size,
pj_bool_t handle_rotation,
pj_bool_t maintain_aspect_ratio);
/* Set rotation */
void pjmedia_vid_dev_conv_set_rotation(pjmedia_vid_dev_conv *conv,
pjmedia_orient rotation);
/* Resize the buffer and rotate it, if necessary */
pj_status_t pjmedia_vid_dev_conv_resize_and_rotate(pjmedia_vid_dev_conv *conv,
void *src_buf,
void **result);
/* Destroy converter */
void pjmedia_vid_dev_conv_destroy_converter(pjmedia_vid_dev_conv *conv);
#endif /* __PJMEDIA_VIDEODEV_UTIL_H__ */
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