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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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ce2d4d40a1
Add support for cropping the source and placing the converted image into a rectangle in the destination frame. Add an option to add a border and border color.
151 lines
5 KiB
C
151 lines
5 KiB
C
/* Video conversion api function
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* Copyright (C) 2014 Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_VIDEO_CONVERTER_H__
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#define __GST_VIDEO_CONVERTER_H__
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#include <gst/video/video.h>
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G_BEGIN_DECLS
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/**
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* GstVideoDitherMethod:
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* @GST_VIDEO_DITHER_NONE: no dithering
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* @GST_VIDEO_DITHER_VERTERR: propagate rounding errors downwards
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* @GST_VIDEO_DITHER_HALFTONE: Dither with halftone pattern
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* @GST_VIDEO_DITHER_HORIZERR: propagate rounding errors right
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*
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* Different dithering methods to use.
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*/
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typedef enum {
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GST_VIDEO_DITHER_NONE,
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GST_VIDEO_DITHER_VERTERR,
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GST_VIDEO_DITHER_HALFTONE,
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GST_VIDEO_DITHER_HORIZERR
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} GstVideoDitherMethod;
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/**
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* GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD:
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*
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* #GST_TYPE_RESAMPLER_METHOD, The resampler method to use for
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* resampling. Other options for the resampler can be used, see
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* the #GstResampler. Default is #GST_RESAMPLER_METHOD_CUBIC
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*/
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#define GST_VIDEO_CONVERTER_OPT_RESAMPLER_METHOD "GstVideoConverter.resampler-method"
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/**
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* GST_VIDEO_CONVERTER_OPT_RESAMPLER_TAPS:
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*
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* #G_TYPE_UINT, The number of taps for the resampler.
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* Default is 0: let the resampler choose a good value.
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*/
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#define GST_VIDEO_CONVERTER_OPT_RESAMPLER_TAPS "GstVideoConverter.resampler-taps"
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/**
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* GST_VIDEO_CONVERTER_OPT_DITHER_METHOD:
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*
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* #GST_TYPE_VIDEO_DITHER_METHOD, The dither method to use when
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* changing bit depth.
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*/
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#define GST_VIDEO_CONVERTER_OPT_DITHER_METHOD "GstVideoConverter.dither-method"
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/**
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* GST_VIDEO_CONVERTER_OPT_SRC_X:
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*
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* #G_TYPE_INT, source x position to start conversion, default 0
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*/
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#define GST_VIDEO_CONVERTER_OPT_SRC_X "GstVideoConverter.src-x"
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/**
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* GST_VIDEO_CONVERTER_OPT_SRC_Y:
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*
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* #G_TYPE_INT, source y position to start conversion, default 0
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*/
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#define GST_VIDEO_CONVERTER_OPT_SRC_Y "GstVideoConverter.src-y"
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/**
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* GST_VIDEO_CONVERTER_OPT_SRC_WIDTH:
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*
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* #G_TYPE_INT, source width to convert, default source width
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*/
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#define GST_VIDEO_CONVERTER_OPT_SRC_WIDTH "GstVideoConverter.src-width"
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/**
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* GST_VIDEO_CONVERTER_OPT_SRC_HEIGHT:
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*
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* #G_TYPE_INT, source height to convert, default source height
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*/
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#define GST_VIDEO_CONVERTER_OPT_SRC_HEIGHT "GstVideoConverter.src-height"
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/**
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* GST_VIDEO_CONVERTER_OPT_DEST_X:
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*
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* #G_TYPE_INT, x position in the destination frame, default 0
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*/
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#define GST_VIDEO_CONVERTER_OPT_DEST_X "GstVideoConverter.dest-x"
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/**
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* GST_VIDEO_CONVERTER_OPT_DEST_Y:
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*
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* #G_TYPE_INT, y position in the destination frame, default 0
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*/
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#define GST_VIDEO_CONVERTER_OPT_DEST_Y "GstVideoConverter.dest-y"
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/**
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* GST_VIDEO_CONVERTER_OPT_DEST_WIDTH:
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*
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* #G_TYPE_INT, width in the destination frame, default destination width
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*/
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#define GST_VIDEO_CONVERTER_OPT_DEST_WIDTH "GstVideoConverter.dest-width"
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/**
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* GST_VIDEO_CONVERTER_OPT_DEST_HEIGHT:
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*
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* #G_TYPE_INT, height in the destination frame, default destination height
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*/
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#define GST_VIDEO_CONVERTER_OPT_DEST_HEIGHT "GstVideoConverter.dest-height"
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/**
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* GST_VIDEO_CONVERTER_OPT_FILL_BORDER:
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*
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* #G_TYPE_BOOLEAN, if the destination rectangle does not fill the complete
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* destination image, render a border with
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* #GST_VIDEO_CONVERTER_OPT_BORDER_ARGB. Otherwise the unusded pixels in the
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* destination are untouched. Default %TRUE.
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*/
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#define GST_VIDEO_CONVERTER_OPT_FILL_BORDER "GstVideoConverter.fill-border"
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/**
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* GST_VIDEO_CONVERTER_OPT_BORDER_ARGB:
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*
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* #G_TYPE_UINT, the border color to use if #GST_VIDEO_CONVERTER_OPT_FILL_BORDER
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* is set to %TRUE. Default 0x00000000
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*/
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#define GST_VIDEO_CONVERTER_OPT_BORDER_ARGB "GstVideoConverter.border-argb"
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typedef struct _GstVideoConverter GstVideoConverter;
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GstVideoConverter * gst_video_converter_new (GstVideoInfo *in_info,
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GstVideoInfo *out_info,
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GstStructure *config);
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void gst_video_converter_free (GstVideoConverter * convert);
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gboolean gst_video_converter_set_config (GstVideoConverter * convert, GstStructure *config);
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const GstStructure * gst_video_converter_get_config (GstVideoConverter * convert);
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void gst_video_converter_frame (GstVideoConverter * convert,
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const GstVideoFrame *src, GstVideoFrame *dest);
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G_END_DECLS
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#endif /* __GST_VIDEO_CONVERTER_H__ */
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