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video_core: NVDEC Implementation

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This commit aims to implement the NVDEC (Nvidia Decoder) functionality, with video frame decoding being handled by the FFmpeg library.

The process begins with Ioctl commands being sent to the NVDEC and VIC (Video Image Composer) emulated devices. These allocate the necessary GPU buffers for the frame data, along with providing information on the incoming video data. A Submit command then signals the GPU to process and decode the frame data.

To decode the frame, the respective codec's header must be manually composed from the information provided by NVDEC, then sent with the raw frame data to the ffmpeg library.

Currently, H264 and VP9 are supported, with VP9 having some minor artifacting issues related mainly to the reference frame composition in its uncompressed header.

Async GPU is not properly implemented at the moment.

Co-Authored-By: David <25727384+ogniK5377@users.noreply.github.com>
This commit is contained in:
ameerj
2020-10-26 23:07:36 -04:00
parent 2f6ba54483
commit eb67a45ca8
53 changed files with 4033 additions and 310 deletions
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12
src/video_core/memory_manager.cpp
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@ -11,6 +11,7 @@
#include "video_core/gpu.h"
#include "video_core/memory_manager.h"
#include "video_core/rasterizer_interface.h"
#include "video_core/renderer_base.h"
namespace Tegra {
@ -44,6 +45,12 @@ GPUVAddr MemoryManager::MapAllocate(VAddr cpu_addr, std::size_t size, std::size_
return Map(cpu_addr, *FindFreeRange(size, align), size);
}
GPUVAddr MemoryManager::MapAllocate32(VAddr cpu_addr, std::size_t size) {
const std::optional<GPUVAddr> gpu_addr = FindFreeRange(size, 1, true);
ASSERT(gpu_addr);
return Map(cpu_addr, *gpu_addr, size);
}
void MemoryManager::Unmap(GPUVAddr gpu_addr, std::size_t size) {
if (!size) {
return;
@ -108,7 +115,8 @@ void MemoryManager::SetPageEntry(GPUVAddr gpu_addr, PageEntry page_entry, std::s
page_table[PageEntryIndex(gpu_addr)] = page_entry;
}
std::optional<GPUVAddr> MemoryManager::FindFreeRange(std::size_t size, std::size_t align) const {
std::optional<GPUVAddr> MemoryManager::FindFreeRange(std::size_t size, std::size_t align,
bool start_32bit_address) const {
if (!align) {
align = page_size;
} else {
@ -116,7 +124,7 @@ std::optional<GPUVAddr> MemoryManager::FindFreeRange(std::size_t size, std::size
}
u64 available_size{};
GPUVAddr gpu_addr{address_space_start};
GPUVAddr gpu_addr{start_32bit_address ? address_space_start_low : address_space_start};
while (gpu_addr + available_size < address_space_size) {
if (GetPageEntry(gpu_addr + available_size).IsUnmapped()) {
available_size += page_size;