gstreamer/subprojects/gst-plugins-bad/sys/applemedia/helpers.c
Nirbheek Chauhan 2d6da02653 applemedia: Consolidate GstVideoFormat <-> CVPixelFormat conversion
In the process we have changed the color value range from video-range
to full-range, which is probably what people want in the first place.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4135>
2023-03-14 23:35:16 +00:00

89 lines
3 KiB
C

/*
* Copyright (C) 2023 Nirbheek Chauhan <nirbheek@centricular.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.
*/
#include "helpers.h"
#include <CoreVideo/CVPixelBuffer.h>
GstVideoFormat
gst_video_format_from_cvpixelformat (int fmt)
{
/* Note that video and full-range color values map to the same format */
switch (fmt) {
/* YUV */
case kCVPixelFormatType_420YpCbCr8Planar:
case kCVPixelFormatType_420YpCbCr8PlanarFullRange:
return GST_VIDEO_FORMAT_I420;
case kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange:
case kCVPixelFormatType_420YpCbCr8BiPlanarFullRange:
return GST_VIDEO_FORMAT_NV12;
case kCVPixelFormatType_422YpCbCr8:
return GST_VIDEO_FORMAT_UYVY;
case kCVPixelFormatType_422YpCbCr8_yuvs:
return GST_VIDEO_FORMAT_YUY2;
/* Alpha YUV */
case kCVPixelFormatType_4444AYpCbCr16:
return GST_VIDEO_FORMAT_AYUV64;
/* RGB formats */
case kCVPixelFormatType_32ARGB:
return GST_VIDEO_FORMAT_ARGB;
case kCVPixelFormatType_32BGRA:
return GST_VIDEO_FORMAT_BGRA;
case kCVPixelFormatType_64ARGB:
return GST_VIDEO_FORMAT_ARGB64_BE;
case kCVPixelFormatType_64RGBALE:
return GST_VIDEO_FORMAT_RGBA64_LE;
default:
return GST_VIDEO_FORMAT_UNKNOWN;
}
}
int
gst_video_format_to_cvpixelformat (GstVideoFormat fmt)
{
switch (fmt) {
/* YUV */
case GST_VIDEO_FORMAT_I420:
return kCVPixelFormatType_420YpCbCr8PlanarFullRange;
case GST_VIDEO_FORMAT_NV12:
return kCVPixelFormatType_420YpCbCr8BiPlanarFullRange;
case GST_VIDEO_FORMAT_UYVY:
return kCVPixelFormatType_422YpCbCr8;
case GST_VIDEO_FORMAT_YUY2:
return kCVPixelFormatType_422YpCbCr8_yuvs;
/* Alpha YUV */
case GST_VIDEO_FORMAT_AYUV64:
/* This is fine for now because Apple only ships LE devices */
#if G_BYTE_ORDER != G_LITTLE_ENDIAN
#error "AYUV64 is NE but kCVPixelFormatType_4444AYpCbCr16 is LE"
#endif
return kCVPixelFormatType_4444AYpCbCr16;
/* RGB formats */
case GST_VIDEO_FORMAT_ARGB:
return kCVPixelFormatType_32ARGB;
case GST_VIDEO_FORMAT_BGRA:
return kCVPixelFormatType_32BGRA;
case GST_VIDEO_FORMAT_ARGB64_BE:
return kCVPixelFormatType_64ARGB;
case GST_VIDEO_FORMAT_RGBA64_LE:
return kCVPixelFormatType_64RGBALE;
default:
g_assert_not_reached ();
return -1;
}
}