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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "hwc-bufferinfo-libdrm"
#include "BufferInfoLibdrm.h"
#include <gralloc_handle.h>
#include <hardware/gralloc.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <mutex>
#include "utils/log.h"
#include "utils/properties.h"
namespace android {
LEGACY_BUFFER_INFO_GETTER(BufferInfoLibdrm);
enum chroma_order {
kYCbCr,
kYCrCb,
};
struct DroidYuvFormat {
/* Lookup keys */
uint32_t native; /* HAL_PIXEL_FORMAT_ */
enum chroma_order chroma_order; /* chroma order is {Cb, Cr} or {Cr, Cb} */
size_t chroma_step; /* Distance in bytes between subsequent chroma pixels. */
/* Result */
int fourcc; /* DRM_FORMAT_ */
};
#ifndef DRM_FORMAT_XYUV8888
#define DRM_FORMAT_XYUV8888 \
fourcc_code('X', 'Y', 'U', 'V') /* [31:0] X:Y:Cb:Cr 8:8:8:8 little endian */
#endif
/* The following table is used to look up a DRI image FourCC based
* on native format and information contained in android_ycbcr struct. */
static const struct DroidYuvFormat kDroidYuvFormats[] = {
/* Native format, YCrCb, Chroma step, DRI image FourCC */
{HAL_PIXEL_FORMAT_YCbCr_420_888, kYCbCr, 2, DRM_FORMAT_NV12},
{HAL_PIXEL_FORMAT_YCbCr_420_888, kYCbCr, 1, DRM_FORMAT_YUV420},
{HAL_PIXEL_FORMAT_YCbCr_420_888, kYCrCb, 1, DRM_FORMAT_YVU420},
{HAL_PIXEL_FORMAT_YV12, kYCrCb, 1, DRM_FORMAT_YVU420},
/* HACK: See droid_create_image_from_prime_fds() and
* https://issuetracker.google.com/32077885. */
{HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, kYCbCr, 2, DRM_FORMAT_NV12},
{HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, kYCbCr, 1, DRM_FORMAT_YUV420},
{HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, kYCrCb, 1, DRM_FORMAT_YVU420},
{HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, kYCrCb, 1, DRM_FORMAT_AYUV},
{HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, kYCrCb, 1, DRM_FORMAT_XYUV8888},
};
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
static uint32_t get_fourcc_yuv(uint32_t native, enum chroma_order chroma_order,
size_t chroma_step) {
for (auto droid_yuv_format : kDroidYuvFormats)
if (droid_yuv_format.native == native &&
droid_yuv_format.chroma_order == chroma_order &&
droid_yuv_format.chroma_step == chroma_step)
return droid_yuv_format.fourcc;
return UINT32_MAX;
}
static bool is_yuv(uint32_t native) {
// NOLINTNEXTLINE(readability-use-anyofallof)
for (auto droid_yuv_format : kDroidYuvFormats)
if (droid_yuv_format.native == native)
return true;
return false;
}
bool BufferInfoLibdrm::GetYuvPlaneInfo(uint32_t hal_format, int num_fds,
buffer_handle_t handle, BufferInfo *bo) {
struct android_ycbcr ycbcr {};
enum chroma_order chroma_order {};
int ret = 0;
if (!gralloc_->lock_ycbcr) {
static std::once_flag once;
std::call_once(once,
[]() { ALOGW("Gralloc does not support lock_ycbcr()"); });
return false;
}
memset(&ycbcr, 0, sizeof(ycbcr));
ret = gralloc_->lock_ycbcr(gralloc_, handle, 0, 0, 0, 0, 0, &ycbcr);
if (ret) {
ALOGW("gralloc->lock_ycbcr failed: %d", ret);
return false;
}
gralloc_->unlock(gralloc_, handle);
/* When lock_ycbcr's usage argument contains no SW_READ/WRITE flags
* it will return the .y/.cb/.cr pointers based on a NULL pointer,
* so they can be interpreted as offsets. */
bo->offsets[0] = (size_t)ycbcr.y;
/* We assume here that all the planes are located in one DMA-buf. */
if ((size_t)ycbcr.cr < (size_t)ycbcr.cb) {
chroma_order = kYCrCb;
bo->offsets[1] = (size_t)ycbcr.cr;
bo->offsets[2] = (size_t)ycbcr.cb;
} else {
chroma_order = kYCbCr;
bo->offsets[1] = (size_t)ycbcr.cb;
bo->offsets[2] = (size_t)ycbcr.cr;
}
/* .ystride is the line length (in bytes) of the Y plane,
* .cstride is the line length (in bytes) of any of the remaining
* Cb/Cr/CbCr planes, assumed to be the same for Cb and Cr for fully
* planar formats. */
bo->pitches[0] = ycbcr.ystride;
bo->pitches[1] = bo->pitches[2] = ycbcr.cstride;
/* .chroma_step is the byte distance between the same chroma channel
* values of subsequent pixels, assumed to be the same for Cb and Cr. */
bo->format = get_fourcc_yuv(hal_format, chroma_order, ycbcr.chroma_step);
if (bo->format == UINT32_MAX) {
ALOGW(
"unsupported YUV format, native = %x, chroma_order = %s, chroma_step = "
"%d",
hal_format, chroma_order == kYCbCr ? "YCbCr" : "YCrCb",
(int)ycbcr.chroma_step);
return false;
}
/*
* Since this is EGL_NATIVE_BUFFER_ANDROID don't assume that
* the single-fd case cannot happen. So handle eithe single
* fd or fd-per-plane case:
*/
if (num_fds == 1) {
bo->prime_fds[2] = bo->prime_fds[1] = bo->prime_fds[0];
} else {
int expected_planes = (ycbcr.chroma_step == 2) ? 2 : 3;
if (num_fds != expected_planes)
return false;
}
return true;
}
auto BufferInfoLibdrm::GetBoInfo(buffer_handle_t handle)
-> std::optional<BufferInfo> {
gralloc_handle_t *gr_handle = gralloc_handle(handle);
if (!gr_handle)
return {};
BufferInfo bi{};
bi.width = gr_handle->width;
bi.height = gr_handle->height;
#if GRALLOC_HANDLE_VERSION < 4
static std::once_flag once;
std::call_once(once, []() {
ALOGE(
"libdrm < v2.4.97 has broken gralloc_handle structure. Please update.");
});
#endif
#if GRALLOC_HANDLE_VERSION == 4
bi.modifiers[0] = gr_handle->modifier;
#endif
bi.prime_fds[0] = gr_handle->prime_fd;
if (is_yuv(gr_handle->format)) {
if (!GetYuvPlaneInfo(gr_handle->format, handle->numFds, handle, &bi))
return {};
} else {
bi.pitches[0] = gr_handle->stride;
bi.offsets[0] = 0;
/* FOSS graphic components (gbm_gralloc, mesa3d) are translating
* HAL_PIXEL_FORMAT_RGB_565 to DRM_FORMAT_RGB565 without swapping
* the R and B components. Same must be done here. */
switch (gr_handle->format) {
case HAL_PIXEL_FORMAT_RGB_565:
bi.format = DRM_FORMAT_RGB565;
break;
default:
bi.format = ConvertHalFormatToDrm(gr_handle->format);
}
if (bi.format == DRM_FORMAT_INVALID)
return {};
}
return bi;
}
constexpr char gbm_gralloc_module_name[] = "GBM Memory Allocator";
constexpr char drm_gralloc_module_name[] = "DRM Memory Allocator";
int BufferInfoLibdrm::ValidateGralloc() {
if (strcmp(gralloc_->common.name, drm_gralloc_module_name) != 0 &&
strcmp(gralloc_->common.name, gbm_gralloc_module_name) != 0) {
ALOGE(
"Gralloc name isn't valid: Expected: \"%s\" or \"%s\", Actual: \"%s\"",
gbm_gralloc_module_name, drm_gralloc_module_name,
gralloc_->common.name);
return -EINVAL;
}
return 0;
}
} // namespace android
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