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Diffstat (limited to 'pjmedia/src/pjmedia-videodev/util.h')
| -rw-r--r-- | pjmedia/src/pjmedia-videodev/util.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia-videodev/util.h b/pjmedia/src/pjmedia-videodev/util.h new file mode 100644 index 00000000..e0b8b21a --- /dev/null +++ b/pjmedia/src/pjmedia-videodev/util.h @@ -0,0 +1,96 @@ +/* $Id$ */ +/* + * 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__ */ |