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959ccf65ad
Previously there was no validation at all and the defaults were set if the colorimetry was not set or invalid, but there's not really any connection between colorimetry and chroma-site. More validation could make sense in the future. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8258>
118 lines
4.5 KiB
C
118 lines
4.5 KiB
C
/* GStreamer
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* Copyright (C) <2013> 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_CHROMA_H__
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#define __GST_VIDEO_CHROMA_H__
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#include <gst/gst.h>
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#include <gst/video/video-prelude.h>
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G_BEGIN_DECLS
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/**
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* GstVideoChromaSite:
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* @GST_VIDEO_CHROMA_SITE_UNKNOWN: unknown cositing
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* @GST_VIDEO_CHROMA_SITE_NONE: no cositing
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* @GST_VIDEO_CHROMA_SITE_H_COSITED: chroma is horizontally cosited
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* @GST_VIDEO_CHROMA_SITE_V_COSITED: chroma is vertically cosited
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* @GST_VIDEO_CHROMA_SITE_ALT_LINE: chroma samples are sited on alternate lines
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* @GST_VIDEO_CHROMA_SITE_COSITED: chroma samples cosited with luma samples
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* @GST_VIDEO_CHROMA_SITE_JPEG: jpeg style cositing, also for mpeg1 and mjpeg
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* @GST_VIDEO_CHROMA_SITE_MPEG2: mpeg2 style cositing
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* @GST_VIDEO_CHROMA_SITE_DV: DV style cositing
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*
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* Various Chroma sitings.
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*/
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typedef enum {
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GST_VIDEO_CHROMA_SITE_UNKNOWN = 0,
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GST_VIDEO_CHROMA_SITE_NONE = (1 << 0),
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GST_VIDEO_CHROMA_SITE_H_COSITED = (1 << 1),
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GST_VIDEO_CHROMA_SITE_V_COSITED = (1 << 2),
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GST_VIDEO_CHROMA_SITE_ALT_LINE = (1 << 3),
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/* some common chroma cositing */
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GST_VIDEO_CHROMA_SITE_COSITED = (GST_VIDEO_CHROMA_SITE_H_COSITED | GST_VIDEO_CHROMA_SITE_V_COSITED),
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GST_VIDEO_CHROMA_SITE_JPEG = (GST_VIDEO_CHROMA_SITE_NONE),
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GST_VIDEO_CHROMA_SITE_MPEG2 = (GST_VIDEO_CHROMA_SITE_H_COSITED),
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GST_VIDEO_CHROMA_SITE_DV = (GST_VIDEO_CHROMA_SITE_COSITED | GST_VIDEO_CHROMA_SITE_ALT_LINE),
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} GstVideoChromaSite;
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GST_VIDEO_DEPRECATED_FOR(gst_video_chroma_site_from_string)
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GstVideoChromaSite gst_video_chroma_from_string (const gchar * s);
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GST_VIDEO_DEPRECATED_FOR(gst_video_chroma_site_to_string)
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const gchar * gst_video_chroma_to_string (GstVideoChromaSite site);
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GST_VIDEO_API
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GstVideoChromaSite gst_video_chroma_site_from_string (const gchar * s);
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GST_VIDEO_API
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gchar * gst_video_chroma_site_to_string (GstVideoChromaSite site);
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/**
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* GstVideoChromaMethod:
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* @GST_VIDEO_CHROMA_METHOD_NEAREST: Duplicates the chroma samples when
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* upsampling and drops when subsampling
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* @GST_VIDEO_CHROMA_METHOD_LINEAR: Uses linear interpolation to reconstruct
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* missing chroma and averaging to subsample
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*
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* Different subsampling and upsampling methods
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*/
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typedef enum {
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GST_VIDEO_CHROMA_METHOD_NEAREST,
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GST_VIDEO_CHROMA_METHOD_LINEAR
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} GstVideoChromaMethod;
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/**
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* GstVideoChromaFlags:
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* @GST_VIDEO_CHROMA_FLAG_NONE: no flags
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* @GST_VIDEO_CHROMA_FLAG_INTERLACED: the input is interlaced
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*
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* Extra flags that influence the result from gst_video_chroma_resample_new().
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*/
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typedef enum {
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GST_VIDEO_CHROMA_FLAG_NONE = 0,
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GST_VIDEO_CHROMA_FLAG_INTERLACED = (1 << 0),
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} GstVideoChromaFlags;
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typedef struct _GstVideoChromaResample GstVideoChromaResample;
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/* circular dependency, need to include this after defining the enums */
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#include <gst/video/video-format.h>
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GST_VIDEO_API
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GstVideoChromaResample * gst_video_chroma_resample_new (GstVideoChromaMethod method,
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GstVideoChromaSite site,
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GstVideoChromaFlags flags,
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GstVideoFormat format,
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gint h_factor, gint v_factor);
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GST_VIDEO_API
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void gst_video_chroma_resample_free (GstVideoChromaResample *resample);
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GST_VIDEO_API
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void gst_video_chroma_resample_get_info (GstVideoChromaResample *resample,
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guint * n_lines, gint *offset);
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GST_VIDEO_API
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void gst_video_chroma_resample (GstVideoChromaResample *resample,
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gpointer lines[], gint width);
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G_END_DECLS
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#endif /* __GST_VIDEO_CHROMA_H__ */
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