freeswitch/src/switch_core_video.c

/*
 * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
 * Copyright (C) 2005-2014, Anthony Minessale II <anthm@freeswitch.org>
 *
 * Version: MPL 1.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
 *
 * The Initial Developer of the Original Code is
 * Seven Du <dujinfang@gmail.com>
 * Portions created by the Initial Developer are Copyright (C)
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 *
 * switch_core_video.c -- Core Video
 *
 */

#include <switch.h>


SWITCH_DECLARE(switch_image_t *)switch_img_alloc(switch_image_t  *img,
						 switch_img_fmt_t fmt,
						 unsigned int d_w,
						 unsigned int d_h,
						 unsigned int align)
{
	return (switch_image_t *)vpx_img_alloc((vpx_image_t *)img, (vpx_img_fmt_t)fmt, d_w, d_h, align);
}

SWITCH_DECLARE(switch_image_t *)switch_img_wrap(switch_image_t  *img,
						switch_img_fmt_t fmt,
						unsigned int d_w,
						unsigned int d_h,
						unsigned int align,
						unsigned char      *img_data)
{
	return (switch_image_t *)vpx_img_wrap((vpx_image_t *)img, (vpx_img_fmt_t)fmt, d_w, d_h, align, img_data);
}

SWITCH_DECLARE(int) switch_img_set_rect(switch_image_t  *img,
				   unsigned int  x,
				   unsigned int  y,
				   unsigned int  w,
				   unsigned int  h)
{
	return vpx_img_set_rect((vpx_image_t *)img, x, y, w, h);
}

SWITCH_DECLARE(void) switch_img_flip(switch_image_t *img)
{
	vpx_img_flip((vpx_image_t *)img);
}

SWITCH_DECLARE(void) switch_img_free(switch_image_t **img)
{
	if (img && *img) {
		vpx_img_free((vpx_image_t *)*img);
	}

	*img = NULL;
}

SWITCH_DECLARE(void) switch_img_copy(switch_image_t *img, switch_image_t **new_img)
{
	switch_assert(img);
	switch_assert(new_img);
	int i, j, k = 1;

	if (!img->fmt == SWITCH_IMG_FMT_I420) return;

	if (*new_img != NULL) {
		if (img->d_w != (*new_img)->d_w || img->d_h != (*new_img)->d_w) {
			switch_img_free(new_img);
		}
	}

	if (*new_img == NULL) {
		*new_img = switch_img_alloc(NULL, SWITCH_IMG_FMT_I420, img->d_w, img->d_h, 1);
	}

	switch_assert(*new_img);

	for (i = 0; i < 3; i++) {
		if (!img->planes[i] || !img->stride[i]) break;
		if (i > 0) k = 2;

		for (j = 0; j < (*new_img)->h; j++) {
			memcpy((*new_img)->planes[i] + (*new_img)->stride[i] * j / k, img->planes[i] + img->stride[i] * j / k, img->d_w);
		}
	}
}

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