From 4bc2d821300354e0d178c520b4b3520afbf8ff20 Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Sun, 18 Dec 2022 18:09:59 -0500
Subject: video_core: Add usages of ScratchBuffer

---
 src/video_core/engines/engine_upload.h |  7 ++++---
 src/video_core/engines/maxwell_dma.cpp | 32 ++++++++------------------------
 src/video_core/engines/maxwell_dma.h   |  8 +++++---
 src/video_core/host1x/vic.h            |  7 ++++---
 4 files changed, 21 insertions(+), 33 deletions(-)

diff --git a/src/video_core/engines/engine_upload.h b/src/video_core/engines/engine_upload.h
index 94fafd9dc..7242d2529 100644
--- a/src/video_core/engines/engine_upload.h
+++ b/src/video_core/engines/engine_upload.h
@@ -4,9 +4,10 @@
 #pragma once
 
 #include <span>
-#include <vector>
+
 #include "common/bit_field.h"
 #include "common/common_types.h"
+#include "common/scratch_buffer.h"
 
 namespace Tegra {
 class MemoryManager;
@@ -73,8 +74,8 @@ private:
 
     u32 write_offset = 0;
     u32 copy_size = 0;
-    std::vector<u8> inner_buffer;
-    std::vector<u8> tmp_buffer;
+    Common::ScratchBuffer<u8> inner_buffer;
+    Common::ScratchBuffer<u8> tmp_buffer;
     bool is_linear = false;
     Registers& regs;
     MemoryManager& memory_manager;
diff --git a/src/video_core/engines/maxwell_dma.cpp b/src/video_core/engines/maxwell_dma.cpp
index a189e60ae..dc873732e 100644
--- a/src/video_core/engines/maxwell_dma.cpp
+++ b/src/video_core/engines/maxwell_dma.cpp
@@ -184,12 +184,8 @@ void MaxwellDMA::CopyBlockLinearToPitch() {
     const size_t src_size =
         CalculateSize(true, bytes_per_pixel, width, height, depth, block_height, block_depth);
 
-    if (read_buffer.size() < src_size) {
-        read_buffer.resize(src_size);
-    }
-    if (write_buffer.size() < dst_size) {
-        write_buffer.resize(dst_size);
-    }
+    read_buffer.resize(src_size);
+    write_buffer.resize(dst_size);
 
     memory_manager.ReadBlock(regs.offset_in, read_buffer.data(), src_size);
     memory_manager.ReadBlock(regs.offset_out, write_buffer.data(), dst_size);
@@ -235,12 +231,8 @@ void MaxwellDMA::CopyPitchToBlockLinear() {
         CalculateSize(true, bytes_per_pixel, width, height, depth, block_height, block_depth);
     const size_t src_size = static_cast<size_t>(regs.pitch_in) * regs.line_count;
 
-    if (read_buffer.size() < src_size) {
-        read_buffer.resize(src_size);
-    }
-    if (write_buffer.size() < dst_size) {
-        write_buffer.resize(dst_size);
-    }
+    read_buffer.resize(src_size);
+    write_buffer.resize(dst_size);
 
     memory_manager.ReadBlock(regs.offset_in, read_buffer.data(), src_size);
     if (Settings::IsGPULevelExtreme()) {
@@ -269,12 +261,8 @@ void MaxwellDMA::FastCopyBlockLinearToPitch() {
     pos_x = pos_x % x_in_gob;
     pos_y = pos_y % 8;
 
-    if (read_buffer.size() < src_size) {
-        read_buffer.resize(src_size);
-    }
-    if (write_buffer.size() < dst_size) {
-        write_buffer.resize(dst_size);
-    }
+    read_buffer.resize(src_size);
+    write_buffer.resize(dst_size);
 
     if (Settings::IsGPULevelExtreme()) {
         memory_manager.ReadBlock(regs.offset_in + offset, read_buffer.data(), src_size);
@@ -333,12 +321,8 @@ void MaxwellDMA::CopyBlockLinearToBlockLinear() {
     const u32 pitch = x_elements * bytes_per_pixel;
     const size_t mid_buffer_size = pitch * regs.line_count;
 
-    if (read_buffer.size() < src_size) {
-        read_buffer.resize(src_size);
-    }
-    if (write_buffer.size() < dst_size) {
-        write_buffer.resize(dst_size);
-    }
+    read_buffer.resize(src_size);
+    write_buffer.resize(dst_size);
 
     intermediate_buffer.resize(mid_buffer_size);
 
diff --git a/src/video_core/engines/maxwell_dma.h b/src/video_core/engines/maxwell_dma.h
index d40d3d302..c88191a61 100644
--- a/src/video_core/engines/maxwell_dma.h
+++ b/src/video_core/engines/maxwell_dma.h
@@ -6,8 +6,10 @@
 #include <array>
 #include <cstddef>
 #include <vector>
+
 #include "common/bit_field.h"
 #include "common/common_types.h"
+#include "common/scratch_buffer.h"
 #include "video_core/engines/engine_interface.h"
 
 namespace Core {
@@ -234,9 +236,9 @@ private:
     MemoryManager& memory_manager;
     VideoCore::RasterizerInterface* rasterizer = nullptr;
 
-    std::vector<u8> read_buffer;
-    std::vector<u8> write_buffer;
-    std::vector<u8> intermediate_buffer;
+    Common::ScratchBuffer<u8> read_buffer;
+    Common::ScratchBuffer<u8> write_buffer;
+    Common::ScratchBuffer<u8> intermediate_buffer;
 
     static constexpr std::size_t NUM_REGS = 0x800;
     struct Regs {
diff --git a/src/video_core/host1x/vic.h b/src/video_core/host1x/vic.h
index 2b78786e8..3d9753047 100644
--- a/src/video_core/host1x/vic.h
+++ b/src/video_core/host1x/vic.h
@@ -4,8 +4,9 @@
 #pragma once
 
 #include <memory>
-#include <vector>
+
 #include "common/common_types.h"
+#include "common/scratch_buffer.h"
 
 struct SwsContext;
 
@@ -49,8 +50,8 @@ private:
     /// size does not change during a stream
     using AVMallocPtr = std::unique_ptr<u8, decltype(&av_free)>;
     AVMallocPtr converted_frame_buffer;
-    std::vector<u8> luma_buffer;
-    std::vector<u8> chroma_buffer;
+    Common::ScratchBuffer<u8> luma_buffer;
+    Common::ScratchBuffer<u8> chroma_buffer;
 
     GPUVAddr config_struct_address{};
     GPUVAddr output_surface_luma_address{};
-- 
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