| /* GStreamer |
| * Copyright (C) <2013> Wim Taymans <wim.taymans@gmail.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library 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 |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifndef __GST_VIDEO_CHROMA_H__ |
| #define __GST_VIDEO_CHROMA_H__ |
| |
| #include <gst/gst.h> |
| |
| G_BEGIN_DECLS |
| |
| /** |
| * GstVideoChromaSite: |
| * @GST_VIDEO_CHROMA_SITE_UNKNOWN: unknown cositing |
| * @GST_VIDEO_CHROMA_SITE_NONE: no cositing |
| * @GST_VIDEO_CHROMA_SITE_H_COSITED: chroma is horizontally cosited |
| * @GST_VIDEO_CHROMA_SITE_V_COSITED: chroma is vertically cosited |
| * @GST_VIDEO_CHROMA_SITE_ALT_LINE: choma samples are sited on alternate lines |
| * @GST_VIDEO_CHROMA_SITE_COSITED: chroma samples cosited with luma samples |
| * @GST_VIDEO_CHROMA_SITE_JPEG: jpeg style cositing, also for mpeg1 and mjpeg |
| * @GST_VIDEO_CHROMA_SITE_MPEG2: mpeg2 style cositing |
| * @GST_VIDEO_CHROMA_SITE_DV: DV style cositing |
| * |
| * Various Chroma sitings. |
| */ |
| typedef enum { |
| GST_VIDEO_CHROMA_SITE_UNKNOWN = 0, |
| GST_VIDEO_CHROMA_SITE_NONE = (1 << 0), |
| GST_VIDEO_CHROMA_SITE_H_COSITED = (1 << 1), |
| GST_VIDEO_CHROMA_SITE_V_COSITED = (1 << 2), |
| GST_VIDEO_CHROMA_SITE_ALT_LINE = (1 << 3), |
| /* some common chroma cositing */ |
| GST_VIDEO_CHROMA_SITE_COSITED = (GST_VIDEO_CHROMA_SITE_H_COSITED | GST_VIDEO_CHROMA_SITE_V_COSITED), |
| GST_VIDEO_CHROMA_SITE_JPEG = (GST_VIDEO_CHROMA_SITE_NONE), |
| GST_VIDEO_CHROMA_SITE_MPEG2 = (GST_VIDEO_CHROMA_SITE_H_COSITED), |
| GST_VIDEO_CHROMA_SITE_DV = (GST_VIDEO_CHROMA_SITE_COSITED | GST_VIDEO_CHROMA_SITE_ALT_LINE), |
| } GstVideoChromaSite; |
| |
| GstVideoChromaSite gst_video_chroma_from_string (const gchar * s); |
| const gchar * gst_video_chroma_to_string (GstVideoChromaSite site); |
| |
| /** |
| * GstVideoChromaMethod: |
| * @GST_VIDEO_CHROMA_METHOD_NEAREST: Duplicates the chroma samples when |
| * upsampling and drops when subsampling |
| * @GST_VIDEO_CHROMA_METHOD_LINEAR: Uses linear interpolation to reconstruct |
| * missing chroma and averaging to subsample |
| * |
| * Different subsampling and upsampling methods |
| */ |
| typedef enum { |
| GST_VIDEO_CHROMA_METHOD_NEAREST, |
| GST_VIDEO_CHROMA_METHOD_LINEAR |
| } GstVideoChromaMethod; |
| |
| /** |
| * GstVideoChromaFlags: |
| * @GST_VIDEO_CHROMA_FLAG_NONE: no flags |
| * @GST_VIDEO_CHROMA_FLAG_INTERLACED: the input is interlaced |
| * |
| * Extra flags that influence the result from gst_video_chroma_resample_new(). |
| */ |
| typedef enum { |
| GST_VIDEO_CHROMA_FLAG_NONE = 0, |
| GST_VIDEO_CHROMA_FLAG_INTERLACED = (1 << 0), |
| } GstVideoChromaFlags; |
| |
| typedef struct _GstVideoChromaResample GstVideoChromaResample; |
| |
| /* circular dependency, need to include this after defining the enums */ |
| #include <gst/video/video-format.h> |
| |
| GstVideoChromaResample * gst_video_chroma_resample_new (GstVideoChromaMethod method, |
| GstVideoChromaSite site, |
| GstVideoChromaFlags flags, |
| GstVideoFormat format, |
| gint h_factor, gint v_factor); |
| void gst_video_chroma_resample_free (GstVideoChromaResample *resample); |
| |
| void gst_video_chroma_resample_get_info (GstVideoChromaResample *resample, |
| guint * n_lines, gint *offset); |
| |
| void gst_video_chroma_resample (GstVideoChromaResample *resample, |
| gpointer lines[], gint width); |
| |
| G_END_DECLS |
| |
| #endif /* __GST_VIDEO_CHROMA_H__ */ |
