1 /* GStreamer 2 * Copyright (C) <2014> Wim Taymans <wim.taymans@gmail.com> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public 15 * License along with this library; if not, write to the 16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20 #ifndef __GST_VIDEO_SCALER_H__ 21 #define __GST_VIDEO_SCALER_H__ 22 23 #include <gst/gst.h> 24 25 #include <gst/video/video-format.h> 26 #include <gst/video/video-color.h> 27 #include <gst/video/video-resampler.h> 28 29 G_BEGIN_DECLS 30 31 /** 32 * GST_VIDEO_SCALER_OPT_DITHER_METHOD: 33 * 34 * #GstVideoDitherMethod, The dither method to use for propagating 35 * quatization errors. 36 */ 37 #define GST_VIDEO_SCALER_OPT_DITHER_METHOD "GstVideoScaler.dither-method" 38 39 /** 40 * GstVideoScalerFlags: 41 * @GST_VIDEO_SCALER_FLAG_NONE: no flags 42 * @GST_VIDEO_SCALER_FLAG_INTERLACED: Set up a scaler for interlaced content 43 * 44 * Different scale flags. 45 */ 46 typedef enum { 47 GST_VIDEO_SCALER_FLAG_NONE = (0), 48 GST_VIDEO_SCALER_FLAG_INTERLACED = (1 << 0), 49 } GstVideoScalerFlags; 50 51 typedef struct _GstVideoScaler GstVideoScaler; 52 53 GST_VIDEO_API 54 GstVideoScaler * gst_video_scaler_new (GstVideoResamplerMethod method, 55 GstVideoScalerFlags flags, 56 guint n_taps, 57 guint in_size, guint out_size, 58 GstStructure * options); 59 60 GST_VIDEO_API 61 void gst_video_scaler_free (GstVideoScaler *scale); 62 63 GST_VIDEO_API 64 guint gst_video_scaler_get_max_taps (GstVideoScaler *scale); 65 66 GST_VIDEO_API 67 const gdouble * gst_video_scaler_get_coeff (GstVideoScaler *scale, 68 guint out_offset, 69 guint *in_offset, 70 guint *n_taps); 71 72 GST_VIDEO_API 73 void gst_video_scaler_horizontal (GstVideoScaler *scale, 74 GstVideoFormat format, 75 gpointer src, gpointer dest, 76 guint dest_offset, guint width); 77 78 GST_VIDEO_API 79 void gst_video_scaler_vertical (GstVideoScaler *scale, 80 GstVideoFormat format, 81 gpointer src_lines[], gpointer dest, 82 guint dest_offset, guint width); 83 84 GST_VIDEO_API 85 GstVideoScaler * gst_video_scaler_combine_packed_YUV (GstVideoScaler * y_scale, 86 GstVideoScaler *uv_scale, 87 GstVideoFormat in_format, 88 GstVideoFormat out_format); 89 90 GST_VIDEO_API 91 void gst_video_scaler_2d (GstVideoScaler *hscale, 92 GstVideoScaler *vscale, 93 GstVideoFormat format, 94 gpointer src, gint src_stride, 95 gpointer dest, gint dest_stride, 96 guint x, guint y, 97 guint width, guint height); 98 99 G_END_DECLS 100 101 #endif /* __GST_VIDEO_SCALER_H__ */ 102