| 1 | /* GStreamer |
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| 2 | * Copyright (C) <2013> Wim Taymans <wim.taymans@gmail.com> |
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| 3 | * |
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| 4 | * This library is free software; you can redistribute it and/or |
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| 5 | * modify it under the terms of the GNU Library General Public |
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| 6 | * License as published by the Free Software Foundation; either |
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| 7 | * version 2 of the License, or (at your option) any later version. |
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| 8 | * |
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| 9 | * This library is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | * Library General Public License for more details. |
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| 13 | * |
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| 14 | * You should have received a copy of the GNU Library General Public |
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| 15 | * License along with this library; if not, write to the |
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| 16 | * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
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| 17 | * Boston, MA 02110-1301, USA. |
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| 18 | */ |
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| 19 | |
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| 20 | #ifndef __GST_VIDEO_CHROMA_H__ |
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| 21 | #define __GST_VIDEO_CHROMA_H__ |
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| 22 | |
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| 23 | #include <gst/gst.h> |
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| 24 | #include <gst/video/video-prelude.h> |
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| 25 | |
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| 26 | G_BEGIN_DECLS |
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| 27 | |
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| 28 | /** |
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| 29 | * GstVideoChromaSite: |
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| 30 | * @GST_VIDEO_CHROMA_SITE_UNKNOWN: unknown cositing |
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| 31 | * @GST_VIDEO_CHROMA_SITE_NONE: no cositing |
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| 32 | * @GST_VIDEO_CHROMA_SITE_H_COSITED: chroma is horizontally cosited |
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| 33 | * @GST_VIDEO_CHROMA_SITE_V_COSITED: chroma is vertically cosited |
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| 34 | * @GST_VIDEO_CHROMA_SITE_ALT_LINE: choma samples are sited on alternate lines |
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| 35 | * @GST_VIDEO_CHROMA_SITE_COSITED: chroma samples cosited with luma samples |
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| 36 | * @GST_VIDEO_CHROMA_SITE_JPEG: jpeg style cositing, also for mpeg1 and mjpeg |
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| 37 | * @GST_VIDEO_CHROMA_SITE_MPEG2: mpeg2 style cositing |
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| 38 | * @GST_VIDEO_CHROMA_SITE_DV: DV style cositing |
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| 39 | * |
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| 40 | * Various Chroma sitings. |
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| 41 | */ |
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| 42 | typedef enum { |
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| 43 | GST_VIDEO_CHROMA_SITE_UNKNOWN = 0, |
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| 44 | GST_VIDEO_CHROMA_SITE_NONE = (1 << 0), |
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| 45 | GST_VIDEO_CHROMA_SITE_H_COSITED = (1 << 1), |
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| 46 | GST_VIDEO_CHROMA_SITE_V_COSITED = (1 << 2), |
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| 47 | GST_VIDEO_CHROMA_SITE_ALT_LINE = (1 << 3), |
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| 48 | /* some common chroma cositing */ |
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| 49 | GST_VIDEO_CHROMA_SITE_COSITED = (GST_VIDEO_CHROMA_SITE_H_COSITED | GST_VIDEO_CHROMA_SITE_V_COSITED), |
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| 50 | GST_VIDEO_CHROMA_SITE_JPEG = (GST_VIDEO_CHROMA_SITE_NONE), |
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| 51 | GST_VIDEO_CHROMA_SITE_MPEG2 = (GST_VIDEO_CHROMA_SITE_H_COSITED), |
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| 52 | GST_VIDEO_CHROMA_SITE_DV = (GST_VIDEO_CHROMA_SITE_COSITED | GST_VIDEO_CHROMA_SITE_ALT_LINE), |
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| 53 | } GstVideoChromaSite; |
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| 54 | |
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| 55 | GST_VIDEO_DEPRECATED_FOR(gst_video_chroma_site_from_string) |
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| 56 | GstVideoChromaSite gst_video_chroma_from_string (const gchar * s); |
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| 57 | |
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| 58 | GST_VIDEO_DEPRECATED_FOR(gst_video_chroma_site_to_string) |
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| 59 | const gchar * gst_video_chroma_to_string (GstVideoChromaSite site); |
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| 60 | |
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| 61 | GST_VIDEO_API |
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| 62 | GstVideoChromaSite gst_video_chroma_site_from_string (const gchar * s); |
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| 63 | |
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| 64 | GST_VIDEO_API |
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| 65 | gchar * gst_video_chroma_site_to_string (GstVideoChromaSite site); |
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| 66 | |
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| 67 | /** |
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| 68 | * GstVideoChromaMethod: |
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| 69 | * @GST_VIDEO_CHROMA_METHOD_NEAREST: Duplicates the chroma samples when |
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| 70 | * upsampling and drops when subsampling |
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| 71 | * @GST_VIDEO_CHROMA_METHOD_LINEAR: Uses linear interpolation to reconstruct |
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| 72 | * missing chroma and averaging to subsample |
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| 73 | * |
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| 74 | * Different subsampling and upsampling methods |
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| 75 | */ |
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| 76 | typedef enum { |
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| 77 | GST_VIDEO_CHROMA_METHOD_NEAREST, |
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| 78 | GST_VIDEO_CHROMA_METHOD_LINEAR |
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| 79 | } GstVideoChromaMethod; |
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| 80 | |
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| 81 | /** |
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| 82 | * GstVideoChromaFlags: |
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| 83 | * @GST_VIDEO_CHROMA_FLAG_NONE: no flags |
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| 84 | * @GST_VIDEO_CHROMA_FLAG_INTERLACED: the input is interlaced |
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| 85 | * |
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| 86 | * Extra flags that influence the result from gst_video_chroma_resample_new(). |
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| 87 | */ |
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| 88 | typedef enum { |
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| 89 | GST_VIDEO_CHROMA_FLAG_NONE = 0, |
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| 90 | GST_VIDEO_CHROMA_FLAG_INTERLACED = (1 << 0), |
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| 91 | } GstVideoChromaFlags; |
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| 92 | |
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| 93 | typedef struct _GstVideoChromaResample GstVideoChromaResample; |
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| 94 | |
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| 95 | /* circular dependency, need to include this after defining the enums */ |
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| 96 | #include <gst/video/video-format.h> |
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| 97 | |
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| 98 | GST_VIDEO_API |
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| 99 | GstVideoChromaResample * gst_video_chroma_resample_new (GstVideoChromaMethod method, |
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| 100 | GstVideoChromaSite site, |
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| 101 | GstVideoChromaFlags flags, |
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| 102 | GstVideoFormat format, |
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| 103 | gint h_factor, gint v_factor); |
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| 104 | |
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| 105 | GST_VIDEO_API |
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| 106 | void gst_video_chroma_resample_free (GstVideoChromaResample *resample); |
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| 107 | |
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| 108 | GST_VIDEO_API |
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| 109 | void gst_video_chroma_resample_get_info (GstVideoChromaResample *resample, |
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| 110 | guint * n_lines, gint *offset); |
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| 111 | |
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| 112 | GST_VIDEO_API |
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| 113 | void gst_video_chroma_resample (GstVideoChromaResample *resample, |
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| 114 | gpointer lines[], gint width); |
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| 115 | |
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| 116 | G_END_DECLS |
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| 117 | |
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| 118 | #endif /* __GST_VIDEO_CHROMA_H__ */ |
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| 119 | |
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