#include "helpers.h"
#include "util.h"
-static uint32_t subsample_stride(uint32_t stride, uint32_t format, size_t plane)
+struct planar_layout {
+ size_t num_planes;
+ int horizontal_subsampling[DRV_MAX_PLANES];
+ int vertical_subsampling[DRV_MAX_PLANES];
+ int bytes_per_pixel[DRV_MAX_PLANES];
+};
+
+// clang-format off
+
+static const struct planar_layout packed_1bpp_layout = {
+ .num_planes = 1,
+ .horizontal_subsampling = { 1 },
+ .vertical_subsampling = { 1 },
+ .bytes_per_pixel = { 1 }
+};
+
+static const struct planar_layout packed_2bpp_layout = {
+ .num_planes = 1,
+ .horizontal_subsampling = { 1 },
+ .vertical_subsampling = { 1 },
+ .bytes_per_pixel = { 2 }
+};
+
+static const struct planar_layout packed_3bpp_layout = {
+ .num_planes = 1,
+ .horizontal_subsampling = { 1 },
+ .vertical_subsampling = { 1 },
+ .bytes_per_pixel = { 3 }
+};
+
+static const struct planar_layout packed_4bpp_layout = {
+ .num_planes = 1,
+ .horizontal_subsampling = { 1 },
+ .vertical_subsampling = { 1 },
+ .bytes_per_pixel = { 4 }
+};
+
+static const struct planar_layout biplanar_yuv_420_layout = {
+ .num_planes = 2,
+ .horizontal_subsampling = { 1, 2 },
+ .vertical_subsampling = { 1, 2 },
+ .bytes_per_pixel = { 1, 2 }
+};
+
+static const struct planar_layout triplanar_yuv_420_layout = {
+ .num_planes = 3,
+ .horizontal_subsampling = { 1, 2, 2 },
+ .vertical_subsampling = { 1, 2, 2 },
+ .bytes_per_pixel = { 1, 1, 1 }
+};
+
+// clang-format on
+
+static const struct planar_layout *layout_from_format(uint32_t format)
{
-
- if (plane != 0) {
- switch (format) {
- case DRM_FORMAT_YVU420:
- case DRM_FORMAT_YVU420_ANDROID:
- stride = DIV_ROUND_UP(stride, 2);
- break;
- }
- }
-
- return stride;
-}
-
-static uint32_t bpp_from_format(uint32_t format, size_t plane)
-{
- assert(plane < drv_num_planes_from_format(format));
-
switch (format) {
case DRM_FORMAT_BGR233:
case DRM_FORMAT_C8:
case DRM_FORMAT_R8:
case DRM_FORMAT_RGB332:
+ return &packed_1bpp_layout;
+
case DRM_FORMAT_YVU420:
case DRM_FORMAT_YVU420_ANDROID:
- return 8;
+ return &triplanar_yuv_420_layout;
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV21:
- return (plane == 0) ? 8 : 4;
+ return &biplanar_yuv_420_layout;
case DRM_FORMAT_ABGR1555:
case DRM_FORMAT_ABGR4444:
case DRM_FORMAT_XRGB4444:
case DRM_FORMAT_YUYV:
case DRM_FORMAT_YVYU:
- return 16;
+ return &packed_2bpp_layout;
case DRM_FORMAT_BGR888:
case DRM_FORMAT_RGB888:
- return 24;
+ return &packed_3bpp_layout;
case DRM_FORMAT_ABGR2101010:
case DRM_FORMAT_ABGR8888:
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_XRGB2101010:
case DRM_FORMAT_XRGB8888:
- return 32;
+ return &packed_4bpp_layout;
+
+ default:
+ drv_log("UNKNOWN FORMAT %d\n", format);
+ return NULL;
}
+}
- drv_log("UNKNOWN FORMAT %d\n", format);
- return 0;
+size_t drv_num_planes_from_format(uint32_t format)
+{
+ const struct planar_layout *layout = layout_from_format(format);
+
+ /*
+ * drv_bo_new calls this function early to query number of planes and
+ * considers 0 planes to mean unknown format, so we have to support
+ * that. All other layout_from_format() queries can assume that the
+ * format is supported and that the return value is non-NULL.
+ */
+
+ return layout ? layout->num_planes : 0;
+}
+
+uint32_t drv_height_from_format(uint32_t format, uint32_t height, size_t plane)
+{
+ const struct planar_layout *layout = layout_from_format(format);
+
+ assert(plane < layout->num_planes);
+
+ return DIV_ROUND_UP(height, layout->vertical_subsampling[plane]);
+}
+
+uint32_t drv_bytes_per_pixel_from_format(uint32_t format, size_t plane)
+{
+ const struct planar_layout *layout = layout_from_format(format);
+
+ assert(plane < layout->num_planes);
+
+ return layout->bytes_per_pixel[plane];
}
uint32_t drv_bo_get_stride_in_pixels(struct bo *bo)
{
- uint32_t bytes_per_pixel = DIV_ROUND_UP(bpp_from_format(bo->format, 0), 8);
+ uint32_t bytes_per_pixel = drv_bytes_per_pixel_from_format(bo->format, 0);
return DIV_ROUND_UP(bo->strides[0], bytes_per_pixel);
}
*/
uint32_t drv_stride_from_format(uint32_t format, uint32_t width, size_t plane)
{
- uint32_t stride = DIV_ROUND_UP(width * bpp_from_format(format, plane), 8);
+ const struct planar_layout *layout = layout_from_format(format);
+ assert(plane < layout->num_planes);
+
+ uint32_t plane_width =
+ DIV_ROUND_UP(width, layout->horizontal_subsampling[plane]);
+ uint32_t stride = plane_width * layout->bytes_per_pixel[plane];
/*
* The stride of Android YV12 buffers is required to be aligned to 16 bytes
uint32_t drv_size_from_format(uint32_t format, uint32_t stride, uint32_t height, size_t plane)
{
- assert(plane < drv_num_planes_from_format(format));
- uint32_t vertical_subsampling;
+ return stride * drv_height_from_format(format, height, plane);
+}
- switch (format) {
- case DRM_FORMAT_NV12:
- case DRM_FORMAT_YVU420:
- case DRM_FORMAT_YVU420_ANDROID:
- vertical_subsampling = (plane == 0) ? 1 : 2;
- break;
- default:
- vertical_subsampling = 1;
+static uint32_t subsample_stride(uint32_t stride, uint32_t format, size_t plane)
+{
+ if (plane != 0) {
+ switch (format) {
+ case DRM_FORMAT_YVU420:
+ case DRM_FORMAT_YVU420_ANDROID:
+ stride = DIV_ROUND_UP(stride, 2);
+ break;
+ }
}
- return stride * DIV_ROUND_UP(height, vertical_subsampling);
+ return stride;
}
/*
memset(&create_dumb, 0, sizeof(create_dumb));
create_dumb.height = aligned_height;
create_dumb.width = aligned_width;
- create_dumb.bpp = bpp_from_format(format, 0);
+ create_dumb.bpp = layout_from_format(format)->bytes_per_pixel[0] * 8;
create_dumb.flags = 0;
ret = drmIoctl(bo->drv->fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
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