media: Introduce helpers to fill pixel format structs
Add two new API helpers, v4l2_fill_pixfmt and v4l2_fill_pixfmt_mp, to be used by drivers to calculate plane sizes and bytes per lines. Note that driver-specific padding and alignment are not taken into account, and must be done by drivers using this API. Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Ezequiel Garcia
Mauro Carvalho Chehab
Родитель
9fb10beb8a
Коммит
f44b969aa3
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@ -445,3 +445,167 @@ int v4l2_s_parm_cap(struct video_device *vdev,
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return ret;
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}
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EXPORT_SYMBOL_GPL(v4l2_s_parm_cap);
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const struct v4l2_format_info *v4l2_format_info(u32 format)
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{
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static const struct v4l2_format_info formats[] = {
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/* RGB formats */
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{ .format = V4L2_PIX_FMT_BGR24, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_RGB24, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_HSV24, .mem_planes = 1, .comp_planes = 1, .bpp = { 3, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_BGR32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_XBGR32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_RGB32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_XRGB32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_HSV32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_ARGB32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_ABGR32, .mem_planes = 1, .comp_planes = 1, .bpp = { 4, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_GREY, .mem_planes = 1, .comp_planes = 1, .bpp = { 1, 0, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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/* YUV packed formats */
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{ .format = V4L2_PIX_FMT_YUYV, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YVYU, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_UYVY, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_VYUY, .mem_planes = 1, .comp_planes = 1, .bpp = { 2, 0, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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/* YUV planar formats */
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{ .format = V4L2_PIX_FMT_NV12, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_NV21, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_NV16, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_NV61, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_NV24, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_NV42, .mem_planes = 1, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YUV410, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
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{ .format = V4L2_PIX_FMT_YVU410, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 4 },
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{ .format = V4L2_PIX_FMT_YUV411P, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 4, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YUV420, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_YVU420, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_YUV422P, .mem_planes = 1, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
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/* YUV planar formats, non contiguous variant */
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{ .format = V4L2_PIX_FMT_YUV420M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_YVU420M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_YUV422M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YVU422M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YUV444M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_YVU444M, .mem_planes = 3, .comp_planes = 3, .bpp = { 1, 1, 1, 0 }, .hdiv = 1, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_NV12M, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_NV21M, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 2 },
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{ .format = V4L2_PIX_FMT_NV16M, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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{ .format = V4L2_PIX_FMT_NV61M, .mem_planes = 2, .comp_planes = 2, .bpp = { 1, 2, 0, 0 }, .hdiv = 2, .vdiv = 1 },
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};
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(formats); ++i)
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if (formats[i].format == format)
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return &formats[i];
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return NULL;
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}
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EXPORT_SYMBOL(v4l2_format_info);
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static inline unsigned int v4l2_format_block_width(const struct v4l2_format_info *info, int plane)
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{
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if (!info->block_w[plane])
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return 1;
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return info->block_w[plane];
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}
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static inline unsigned int v4l2_format_block_height(const struct v4l2_format_info *info, int plane)
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{
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if (!info->block_h[plane])
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return 1;
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return info->block_h[plane];
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}
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int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt,
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int pixelformat, int width, int height)
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{
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const struct v4l2_format_info *info;
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struct v4l2_plane_pix_format *plane;
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int i;
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info = v4l2_format_info(pixelformat);
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if (!info)
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return -EINVAL;
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pixfmt->width = width;
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pixfmt->height = height;
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pixfmt->pixelformat = pixelformat;
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pixfmt->num_planes = info->mem_planes;
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if (info->mem_planes == 1) {
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plane = &pixfmt->plane_fmt[0];
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plane->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
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plane->sizeimage = 0;
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for (i = 0; i < info->comp_planes; i++) {
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unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
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unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
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unsigned int aligned_width;
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unsigned int aligned_height;
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aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
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aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
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plane->sizeimage += info->bpp[i] *
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DIV_ROUND_UP(aligned_width, hdiv) *
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DIV_ROUND_UP(aligned_height, vdiv);
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}
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} else {
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for (i = 0; i < info->comp_planes; i++) {
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unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
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unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
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unsigned int aligned_width;
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unsigned int aligned_height;
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aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
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aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
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plane = &pixfmt->plane_fmt[i];
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plane->bytesperline =
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info->bpp[i] * DIV_ROUND_UP(aligned_width, hdiv);
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plane->sizeimage =
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plane->bytesperline * DIV_ROUND_UP(aligned_height, vdiv);
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}
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt_mp);
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int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, int pixelformat, int width, int height)
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{
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const struct v4l2_format_info *info;
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int i;
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info = v4l2_format_info(pixelformat);
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if (!info)
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return -EINVAL;
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/* Single planar API cannot be used for multi plane formats. */
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if (info->mem_planes > 1)
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return -EINVAL;
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pixfmt->width = width;
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pixfmt->height = height;
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pixfmt->pixelformat = pixelformat;
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pixfmt->bytesperline = ALIGN(width, v4l2_format_block_width(info, 0)) * info->bpp[0];
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pixfmt->sizeimage = 0;
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for (i = 0; i < info->comp_planes; i++) {
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unsigned int hdiv = (i == 0) ? 1 : info->hdiv;
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unsigned int vdiv = (i == 0) ? 1 : info->vdiv;
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unsigned int aligned_width;
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unsigned int aligned_height;
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aligned_width = ALIGN(width, v4l2_format_block_width(info, i));
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aligned_height = ALIGN(height, v4l2_format_block_height(info, i));
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pixfmt->sizeimage += info->bpp[i] *
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DIV_ROUND_UP(aligned_width, hdiv) *
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DIV_ROUND_UP(aligned_height, vdiv);
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(v4l2_fill_pixfmt);
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@ -392,4 +392,37 @@ int v4l2_s_parm_cap(struct video_device *vdev,
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((u64)(a).numerator * (b).denominator OP \
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(u64)(b).numerator * (a).denominator)
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/* ------------------------------------------------------------------------- */
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/* Pixel format and FourCC helpers */
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/**
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* struct v4l2_format_info - information about a V4L2 format
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* @format: 4CC format identifier (V4L2_PIX_FMT_*)
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* @mem_planes: Number of memory planes, which includes the alpha plane (1 to 4).
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* @comp_planes: Number of component planes, which includes the alpha plane (1 to 4).
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* @bpp: Array of per-plane bytes per pixel
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* @hdiv: Horizontal chroma subsampling factor
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* @vdiv: Vertical chroma subsampling factor
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* @block_w: Per-plane macroblock pixel width (optional)
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* @block_h: Per-plane macroblock pixel height (optional)
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*/
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struct v4l2_format_info {
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u32 format;
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u8 mem_planes;
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u8 comp_planes;
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u8 bpp[4];
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u8 hdiv;
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u8 vdiv;
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u8 block_w[4];
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u8 block_h[4];
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};
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const struct v4l2_format_info *v4l2_format_info(u32 format);
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int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, int pixelformat,
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int width, int height);
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int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, int pixelformat,
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int width, int height);
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#endif /* V4L2_COMMON_H_ */
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