gstreamer/subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2format.c
Nicolas Dufresne 5980fb76e7 video: Add arbitrary tile dimensions support
In current tile representation, only tiles with power of two
width and height in bytes are supported. This limitation
prevents adding more complex tiles formats.

In this patch, we deprecate tile_ws and tile_hs from GstVideoFormatInfo and
replace if with an array of GstVideoTileInfo. Each plane tiles are then
described with their pixels width/height, line stride and total size.
The helper gst_video_format_info_get_tile_sizes() that depends on the
deprecated API is also being removed. This can simply be removed as it wasn't
in any stable release yet.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3424>
2022-11-18 22:59:29 +00:00

203 lines
5.8 KiB
C

/* GStreamer
* Copyright (C) 2020 Nicolas Dufresne <nicolas.dufresne@collabora.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 "gstv4l2format.h"
#define GST_CAT_DEFAULT gstv4l2codecs_debug
GST_DEBUG_CATEGORY_EXTERN (gstv4l2codecs_debug);
struct FormatEntry
{
guint32 v4l2_pix_fmt;
gint num_planes;
GstVideoFormat gst_fmt;
guint bitdepth;
gint subsampling;
};
static struct FormatEntry format_map[] = {
{V4L2_PIX_FMT_NV12, 1, GST_VIDEO_FORMAT_NV12, 8, 420},
{V4L2_PIX_FMT_YUYV, 1, GST_VIDEO_FORMAT_YUY2, 8, 422},
{V4L2_PIX_FMT_SUNXI_TILED_NV12, 1, GST_VIDEO_FORMAT_NV12_32L32, 8, 422},
{V4L2_PIX_FMT_NV12_4L4, 1, GST_VIDEO_FORMAT_NV12_4L4, 8, 420},
{V4L2_PIX_FMT_MM21, 2, GST_VIDEO_FORMAT_NV12_16L32S, 8, 420},
{V4L2_PIX_FMT_YUV420M, 3, GST_VIDEO_FORMAT_I420, 8, 420},
{V4L2_PIX_FMT_P010, 1, GST_VIDEO_FORMAT_P010_10LE, 16, 420},
{0,}
};
static struct FormatEntry *
lookup_v4l2_fmt (guint v4l2_pix_fmt)
{
gint i;
struct FormatEntry *ret = NULL;
for (i = 0; format_map[i].v4l2_pix_fmt; i++) {
if (format_map[i].v4l2_pix_fmt == v4l2_pix_fmt) {
ret = format_map + i;
break;
}
}
return ret;
}
static struct FormatEntry *
lookup_gst_fmt (GstVideoFormat gst_fmt)
{
gint i;
struct FormatEntry *ret = NULL;
for (i = 0; format_map[i].v4l2_pix_fmt; i++) {
if (format_map[i].gst_fmt == gst_fmt) {
ret = format_map + i;
break;
}
}
return ret;
}
static void
set_stride (GstVideoInfo * info, gint plane, gint stride)
{
const GstVideoFormatInfo *finfo = info->finfo;
if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
guint x_tiles, y_tiles, tile_height, padded_height;
tile_height = GST_VIDEO_FORMAT_INFO_TILE_HEIGHT (finfo, plane);
padded_height = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, plane,
info->height);
padded_height = (padded_height + tile_height - 1) / tile_height;
x_tiles = stride / GST_VIDEO_FORMAT_INFO_TILE_STRIDE (finfo, plane);
y_tiles = padded_height / tile_height;
info->stride[plane] = GST_VIDEO_TILE_MAKE_STRIDE (x_tiles, y_tiles);
} else {
info->stride[plane] = stride;
}
}
gboolean
gst_v4l2_format_to_video_info (struct v4l2_format *fmt, GstVideoInfo * out_info)
{
struct FormatEntry *entry = lookup_v4l2_fmt (fmt->fmt.pix_mp.pixelformat);
struct v4l2_pix_format_mplane *pix_mp = &fmt->fmt.pix_mp;
struct v4l2_pix_format *pix = &fmt->fmt.pix;
gint plane;
gsize offset = 0;
gboolean extrapolate = FALSE;
if (!entry)
return FALSE;
/* validate the entry against the format */
if (V4L2_TYPE_IS_MULTIPLANAR (fmt->type)) {
if (entry->num_planes != pix_mp->num_planes) {
GST_ERROR ("Miss-matched number of planes in internal entry "
"(%i != %i)", entry->num_planes, pix_mp->num_planes);
return FALSE;
}
} else if (entry->num_planes != 1) {
GST_ERROR ("Miss-matched number of planes in internal entry "
"(must be 1 for non-multiplanar, got %i)", entry->num_planes);
return FALSE;
}
if (!gst_video_info_set_format (out_info, entry->gst_fmt,
pix_mp->width, pix_mp->height))
return FALSE;
if (V4L2_TYPE_IS_MULTIPLANAR (fmt->type)) {
out_info->size = 0;
for (plane = 0; plane < pix_mp->num_planes; plane++)
out_info->size += pix_mp->plane_fmt[plane].sizeimage;
} else {
out_info->size = pix->sizeimage;
}
/*
* When single allocation formats are used for planar formats we need to
* extrapolate the per-plane stride. Do this check once to prevent
* complex inner loop.
*/
if (entry->num_planes == 1 && out_info->finfo->n_planes != entry->num_planes)
extrapolate = TRUE;
for (plane = 0; plane < GST_VIDEO_INFO_N_PLANES (out_info); plane++) {
gint stride;
if (V4L2_TYPE_IS_MULTIPLANAR (fmt->type)) {
if (extrapolate)
stride = gst_video_format_info_extrapolate_stride (out_info->finfo,
plane, pix_mp->plane_fmt[0].bytesperline);
else
stride = pix_mp->plane_fmt[plane].bytesperline;
} else {
if (extrapolate)
stride = gst_video_format_info_extrapolate_stride (out_info->finfo,
plane, pix->bytesperline);
else
stride = pix->bytesperline;
}
set_stride (out_info, plane, stride);
out_info->offset[plane] = offset;
if ((V4L2_TYPE_IS_MULTIPLANAR (fmt->type) && !extrapolate))
offset += pix_mp->plane_fmt[plane].sizeimage;
else
offset += stride * GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (out_info->finfo,
plane, pix_mp->height);
}
/* Check that the extrapolation didn't overflow the reported sizeimage */
if (extrapolate && offset > out_info->size) {
GST_ERROR ("Extrapolated plane offset overflow the image size.");
return FALSE;
}
return TRUE;
}
gboolean
gst_v4l2_format_to_video_format (guint32 pix_fmt, GstVideoFormat * out_format)
{
struct FormatEntry *entry = lookup_v4l2_fmt (pix_fmt);
if (!entry)
return FALSE;
*out_format = entry->gst_fmt;
return TRUE;
}
gboolean
gst_v4l2_format_from_video_format (GstVideoFormat format, guint32 * out_pix_fmt)
{
struct FormatEntry *entry = lookup_gst_fmt (format);
if (!entry)
return FALSE;
*out_pix_fmt = entry->v4l2_pix_fmt;
return TRUE;
}