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/* 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>
#include <gst/video/video-prelude.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;
GST_VIDEO_DEPRECATED_FOR(gst_video_chroma_site_from_string)
GstVideoChromaSite gst_video_chroma_from_string (const gchar * s);
GST_VIDEO_DEPRECATED_FOR(gst_video_chroma_site_to_string)
const gchar * gst_video_chroma_to_string (GstVideoChromaSite site);
GST_VIDEO_API
GstVideoChromaSite gst_video_chroma_site_from_string (const gchar * s);
GST_VIDEO_API
gchar * gst_video_chroma_site_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>
GST_VIDEO_API
GstVideoChromaResample * gst_video_chroma_resample_new (GstVideoChromaMethod method,
GstVideoChromaSite site,
GstVideoChromaFlags flags,
GstVideoFormat format,
gint h_factor, gint v_factor);
GST_VIDEO_API
void gst_video_chroma_resample_free (GstVideoChromaResample *resample);
GST_VIDEO_API
void gst_video_chroma_resample_get_info (GstVideoChromaResample *resample,
guint * n_lines, gint *offset);
GST_VIDEO_API
void gst_video_chroma_resample (GstVideoChromaResample *resample,
gpointer lines[], gint width);
G_END_DECLS
#endif /* __GST_VIDEO_CHROMA_H__ */
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