Fernando S
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// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <array>
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#include <vector>
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#include "video_core/command_classes/codecs/vp8.h"
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#include "video_core/gpu.h"
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#include "video_core/memory_manager.h"
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namespace Tegra::Decoder {
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VP8::VP8(GPU& gpu_) : gpu(gpu_) {}
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VP8::~VP8() = default;
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const std::vector<u8>& VP8::ComposeFrame(const NvdecCommon::NvdecRegisters& state) {
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VP8PictureInfo info;
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gpu.MemoryManager().ReadBlock(state.picture_info_offset, &info, sizeof(VP8PictureInfo));
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const bool is_key_frame = info.key_frame == 1u;
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const auto bitstream_size = static_cast<size_t>(info.vld_buffer_size);
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const size_t header_size = is_key_frame ? 10u : 3u;
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frame.resize(header_size + bitstream_size);
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// Based on page 30 of the VP8 specification.
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// https://datatracker.ietf.org/doc/rfc6386/
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frame[0] = is_key_frame ? 0u : 1u; // 1-bit frame type (0: keyframe, 1: interframes).
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frame[0] |= static_cast<u8>((info.version & 7u) << 1u); // 3-bit version number
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frame[0] |= static_cast<u8>(1u << 4u); // 1-bit show_frame flag
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// The next 19-bits are the first partition size
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frame[0] |= static_cast<u8>((info.first_part_size & 7u) << 5u);
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frame[1] = static_cast<u8>((info.first_part_size & 0x7f8u) >> 3u);
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frame[2] = static_cast<u8>((info.first_part_size & 0x7f800u) >> 11u);
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if (is_key_frame) {
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frame[3] = 0x9du;
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frame[4] = 0x01u;
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frame[5] = 0x2au;
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// TODO(ameerj): Horizontal/Vertical Scale
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// 16 bits: (2 bits Horizontal Scale << 14) | Width (14 bits)
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frame[6] = static_cast<u8>(info.frame_width & 0xff);
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frame[7] = static_cast<u8>(((info.frame_width >> 8) & 0x3f));
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// 16 bits:(2 bits Vertical Scale << 14) | Height (14 bits)
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frame[8] = static_cast<u8>(info.frame_height & 0xff);
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frame[9] = static_cast<u8>(((info.frame_height >> 8) & 0x3f));
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}
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const u64 bitstream_offset = state.frame_bitstream_offset;
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gpu.MemoryManager().ReadBlock(bitstream_offset, frame.data() + header_size, bitstream_size);
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return frame;
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}
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} // namespace Tegra::Decoder
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// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <vector>
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#include "common/common_funcs.h"
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#include "common/common_types.h"
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#include "video_core/command_classes/nvdec_common.h"
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namespace Tegra {
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class GPU;
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namespace Decoder {
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class VP8 {
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public:
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explicit VP8(GPU& gpu);
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~VP8();
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/// Compose the VP8 frame for FFmpeg decoding
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[[nodiscard]] const std::vector<u8>& ComposeFrame(const NvdecCommon::NvdecRegisters& state);
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private:
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std::vector<u8> frame;
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GPU& gpu;
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struct VP8PictureInfo {
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INSERT_PADDING_WORDS_NOINIT(14);
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u16 frame_width; // actual frame width
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u16 frame_height; // actual frame height
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u8 key_frame;
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u8 version;
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union {
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u8 raw;
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BitField<0, 2, u8> tile_format;
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BitField<2, 3, u8> gob_height;
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BitField<5, 3, u8> reserverd_surface_format;
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};
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u8 error_conceal_on; // 1: error conceal on; 0: off
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u32 first_part_size; // the size of first partition(frame header and mb header partition)
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u32 hist_buffer_size; // in units of 256
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u32 vld_buffer_size; // in units of 1
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// Current frame buffers
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std::array<u32, 2> frame_stride; // [y_c]
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u32 luma_top_offset; // offset of luma top field in units of 256
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u32 luma_bot_offset; // offset of luma bottom field in units of 256
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u32 luma_frame_offset; // offset of luma frame in units of 256
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u32 chroma_top_offset; // offset of chroma top field in units of 256
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u32 chroma_bot_offset; // offset of chroma bottom field in units of 256
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u32 chroma_frame_offset; // offset of chroma frame in units of 256
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INSERT_PADDING_BYTES_NOINIT(0x1c); // NvdecDisplayParams
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// Decode picture buffer related
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s8 current_output_memory_layout;
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// output NV12/NV24 setting. index 0: golden; 1: altref; 2: last
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std::array<s8, 3> output_memory_layout;
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u8 segmentation_feature_data_update;
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INSERT_PADDING_BYTES_NOINIT(3);
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// ucode return result
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u32 result_value;
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std::array<u32, 8> partition_offset;
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INSERT_PADDING_WORDS_NOINIT(3);
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};
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static_assert(sizeof(VP8PictureInfo) == 0xc0, "PictureInfo is an invalid size");
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};
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} // namespace Decoder
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} // namespace Tegra
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