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Diffstat (limited to 'bufferinfo/legacy/BufferInfoLibdrm.cpp')
| -rw-r--r-- | bufferinfo/legacy/BufferInfoLibdrm.cpp | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/bufferinfo/legacy/BufferInfoLibdrm.cpp b/bufferinfo/legacy/BufferInfoLibdrm.cpp new file mode 100644 index 0000000..3f6a6fd --- /dev/null +++ b/bufferinfo/legacy/BufferInfoLibdrm.cpp @@ -0,0 +1,195 @@ +/* + * 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 <cutils/properties.h> +#include <gralloc_handle.h> +#include <hardware/gralloc.h> +#include <log/log.h> +#include <xf86drm.h> +#include <xf86drmMode.h> + +namespace android { + +LEGACY_BUFFER_INFO_GETTER(BufferInfoLibdrm); + +enum chroma_order { + YCbCr, + YCrCb, +}; + +struct droid_yuv_format { + /* Lookup keys */ + int native; /* HAL_PIXEL_FORMAT_ */ + enum chroma_order chroma_order; /* chroma order is {Cb, Cr} or {Cr, Cb} */ + int chroma_step; /* Distance in bytes between subsequent chroma pixels. */ + + /* Result */ + int fourcc; /* DRM_FORMAT_ */ +}; + +/* 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 droid_yuv_format droid_yuv_formats[] = { + /* Native format, YCrCb, Chroma step, DRI image FourCC */ + {HAL_PIXEL_FORMAT_YCbCr_420_888, YCbCr, 2, DRM_FORMAT_NV12}, + {HAL_PIXEL_FORMAT_YCbCr_420_888, YCbCr, 1, DRM_FORMAT_YUV420}, + {HAL_PIXEL_FORMAT_YCbCr_420_888, YCrCb, 1, DRM_FORMAT_YVU420}, + {HAL_PIXEL_FORMAT_YV12, YCrCb, 1, DRM_FORMAT_YVU420}, + /* HACK: See droid_create_image_from_prime_fds() and + * https://issuetracker.google.com/32077885. */ + {HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, YCbCr, 2, DRM_FORMAT_NV12}, + {HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, YCbCr, 1, DRM_FORMAT_YUV420}, + {HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, YCrCb, 1, DRM_FORMAT_YVU420}, + {HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, YCrCb, 1, DRM_FORMAT_AYUV}, + {HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED, YCrCb, 1, DRM_FORMAT_XYUV8888}, +}; + +#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) + +static int get_fourcc_yuv(int native, enum chroma_order chroma_order, + int chroma_step) { + for (int i = 0; i < ARRAY_SIZE(droid_yuv_formats); ++i) + if (droid_yuv_formats[i].native == native && + droid_yuv_formats[i].chroma_order == chroma_order && + droid_yuv_formats[i].chroma_step == chroma_step) + return droid_yuv_formats[i].fourcc; + + return -1; +} + +static bool is_yuv(int native) { + for (int i = 0; i < ARRAY_SIZE(droid_yuv_formats); ++i) + if (droid_yuv_formats[i].native == native) + return true; + + return false; +} + +bool BufferInfoLibdrm::GetYuvPlaneInfo(int num_fds, buffer_handle_t handle, + hwc_drm_bo_t *bo) { + struct android_ycbcr ycbcr; + enum chroma_order chroma_order; + int ret; + + 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 = YCrCb; + bo->offsets[1] = (size_t)ycbcr.cr; + bo->offsets[2] = (size_t)ycbcr.cb; + } else { + chroma_order = YCbCr; + 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(bo->hal_format, chroma_order, ycbcr.chroma_step); + if (bo->format == -1) { + ALOGW( + "unsupported YUV format, native = %x, chroma_order = %s, chroma_step = " + "%d", + bo->hal_format, chroma_order == YCbCr ? "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; +} + +int BufferInfoLibdrm::ConvertBoInfo(buffer_handle_t handle, hwc_drm_bo_t *bo) { + gralloc_handle_t *gr_handle = gralloc_handle(handle); + if (!gr_handle) + return -EINVAL; + + bo->width = gr_handle->width; + bo->height = gr_handle->height; + bo->hal_format = gr_handle->format; + +#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 + bo->modifiers[0] = gr_handle->modifier; + bo->with_modifiers = gr_handle->modifier != DRM_FORMAT_MOD_NONE && + gr_handle->modifier != DRM_FORMAT_MOD_INVALID; +#endif + + bo->usage = gr_handle->usage; + bo->prime_fds[0] = gr_handle->prime_fd; + + if (is_yuv(gr_handle->format)) { + if (!GetYuvPlaneInfo(handle->numFds, handle, bo)) + return -EINVAL; + } else { + bo->pitches[0] = gr_handle->stride; + bo->offsets[0] = 0; + bo->format = ConvertHalFormatToDrm(gr_handle->format); + if (bo->format == DRM_FORMAT_INVALID) + return -EINVAL; + } + + return 0; +} + +} // namespace android |