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From 47cf0121df5c54d665ccbf9a721cddf547fbbce3 Mon Sep 17 00:00:00 2001
From: Kazunori Kobayashi <kkobayas@igel.co.jp>
Date: Thu, 4 Oct 2012 11:29:44 +0900
Subject: [PATCH 16/31] videocrop: support getting NV12 image details
This patch adds a new pixel format definition that is NV12 format.
The color format type of NV12 is classified into VIDEO_CROP_PIXEL_FORMAT_SEMI_PLANAR.
When rowstride or chroma_byte_offset is contained in caps, image
details reflects these value.
This is preliminary for NV12 zero-copy cropping.
---
gst/videocrop/gstvideocrop.c | 21 +++++++++++++++++++++
gst/videocrop/gstvideocrop.h | 8 ++++++--
2 files changed, 27 insertions(+), 2 deletions(-)
diff --git a/gst/videocrop/gstvideocrop.c b/gst/videocrop/gstvideocrop.c
index 0743719..b6336da 100644
--- a/gst/videocrop/gstvideocrop.c
+++ b/gst/videocrop/gstvideocrop.c
@@ -328,6 +328,27 @@ gst_video_crop_get_image_details_from_structure (GstVideoCrop * vcrop,
details->v_stride * (GST_ROUND_UP_2 (height) / 2);
break;
}
+ case GST_MAKE_FOURCC ('N', 'V', '1', '2'):
+ {
+ gint stride, chroma_byte_offset;
+
+ details->packing = VIDEO_CROP_PIXEL_FORMAT_SEMI_PLANAR;
+
+ if (gst_structure_get_int (structure, "rowstride", &stride))
+ details->stride = stride;
+ else
+ details->stride = GST_ROUND_UP_2 (width);
+
+ details->y_off = 0;
+ if (gst_structure_get_int (structure, "chroma_byte_offset",
+ &chroma_byte_offset))
+ details->uv_off = chroma_byte_offset;
+ else
+ details->uv_off = details->stride * GST_ROUND_UP_2 (height);
+
+ details->size = details->uv_off * 3 / 2;
+ }
+ break;
default:
goto unknown_format;
}
diff --git a/gst/videocrop/gstvideocrop.h b/gst/videocrop/gstvideocrop.h
index 5cfe03e..2e5d5e6 100644
--- a/gst/videocrop/gstvideocrop.h
+++ b/gst/videocrop/gstvideocrop.h
@@ -37,7 +37,8 @@ G_BEGIN_DECLS
{
VIDEO_CROP_PIXEL_FORMAT_PACKED_SIMPLE = 0, /* RGBx, AYUV */
VIDEO_CROP_PIXEL_FORMAT_PACKED_COMPLEX, /* UYVY, YVYU */
- VIDEO_CROP_PIXEL_FORMAT_PLANAR /* I420, YV12 */
+ VIDEO_CROP_PIXEL_FORMAT_PLANAR, /* I420, YV12 */
+ VIDEO_CROP_PIXEL_FORMAT_SEMI_PLANAR /* NV12 */
} VideoCropPixelFormat;
typedef struct _GstVideoCropImageDetails GstVideoCropImageDetails;
@@ -51,7 +52,7 @@ struct _GstVideoCropImageDetails
guint size;
/* for packed RGB and YUV */
- guint stride;
+ guint stride; /* common use in semi-planar */
guint bytes_per_pixel;
guint8 macro_y_off; /* for YUY2, YVYU, UYVY, Y offset within macropixel in bytes */
@@ -59,6 +60,9 @@ struct _GstVideoCropImageDetails
guint y_stride, y_off;
guint u_stride, u_off;
guint v_stride, v_off;
+
+ /* for semi-planar YUV */
+ guint uv_off;
};
typedef struct _GstVideoCrop GstVideoCrop;
--
1.7.9.5
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