scratch_buffer: Explicitly defing resize and resize_destructive functions

resize keeps previous data intact when the buffer grows
resize_destructive destroys the previous data when the buffer grows
This commit is contained in:
ameerj 2022-12-19 22:40:50 -05:00
parent 64869807e2
commit c6590ad07b
7 changed files with 108 additions and 19 deletions

View file

@ -25,7 +25,20 @@ public:
~ScratchBuffer() = default;
/// This will only grow the buffer's capacity if size is greater than the current capacity.
/// The previously held data will remain intact.
void resize(size_t size) {
if (size > buffer_capacity) {
auto new_buffer = Common::make_unique_for_overwrite<T[]>(size);
std::move(buffer.get(), buffer.get() + buffer_capacity, new_buffer.get());
buffer = std::move(new_buffer);
buffer_capacity = size;
}
last_requested_size = size;
}
/// This will only grow the buffer's capacity if size is greater than the current capacity.
/// The previously held data will be destroyed if a reallocation occurs.
void resize_destructive(size_t size) {
if (size > buffer_capacity) {
buffer_capacity = size;
buffer = Common::make_unique_for_overwrite<T[]>(buffer_capacity);
@ -61,6 +74,10 @@ public:
return buffer[i];
}
[[nodiscard]] const T& operator[](size_t i) const {
return buffer[i];
}
[[nodiscard]] size_t size() const noexcept {
return last_requested_size;
}

View file

@ -29,7 +29,7 @@ TEST_CASE("ScratchBuffer: Basic Test", "[common]") {
}
}
TEST_CASE("ScratchBuffer: Resize Grow", "[common]") {
TEST_CASE("ScratchBuffer: resize_destructive Grow", "[common]") {
std::array<u8, 10> payload;
payload.fill(66);
@ -38,14 +38,86 @@ TEST_CASE("ScratchBuffer: Resize Grow", "[common]") {
REQUIRE(buf.capacity() == payload.size());
// Increasing the size should reallocate the buffer
buf.resize(payload.size() * 2);
buf.resize_destructive(payload.size() * 2);
REQUIRE(buf.size() == payload.size() * 2);
REQUIRE(buf.capacity() == payload.size() * 2);
// Since the buffer is not value initialized, reading its data will be garbage
}
TEST_CASE("ScratchBuffer: Resize Shrink", "[common]") {
TEST_CASE("ScratchBuffer: resize_destructive Shrink", "[common]") {
std::array<u8, 10> payload;
payload.fill(66);
ScratchBuffer<u8> buf(payload.size());
REQUIRE(buf.size() == payload.size());
REQUIRE(buf.capacity() == payload.size());
std::memcpy(buf.data(), payload.data(), payload.size());
for (size_t i = 0; i < payload.size(); ++i) {
REQUIRE(buf[i] == payload[i]);
}
// Decreasing the size should not cause a buffer reallocation
// This can be tested by ensuring the buffer capacity and data has not changed,
buf.resize_destructive(1U);
REQUIRE(buf.size() == 1U);
REQUIRE(buf.capacity() == payload.size());
for (size_t i = 0; i < payload.size(); ++i) {
REQUIRE(buf[i] == payload[i]);
}
}
TEST_CASE("ScratchBuffer: resize Grow u8", "[common]") {
std::array<u8, 10> payload;
payload.fill(66);
ScratchBuffer<u8> buf(payload.size());
REQUIRE(buf.size() == payload.size());
REQUIRE(buf.capacity() == payload.size());
std::memcpy(buf.data(), payload.data(), payload.size());
for (size_t i = 0; i < payload.size(); ++i) {
REQUIRE(buf[i] == payload[i]);
}
// Increasing the size should reallocate the buffer
buf.resize(payload.size() * 2);
REQUIRE(buf.size() == payload.size() * 2);
REQUIRE(buf.capacity() == payload.size() * 2);
// resize() keeps the previous data intact
for (size_t i = 0; i < payload.size(); ++i) {
REQUIRE(buf[i] == payload[i]);
}
}
TEST_CASE("ScratchBuffer: resize Grow u64", "[common]") {
std::array<u64, 10> payload;
payload.fill(6666);
ScratchBuffer<u64> buf(payload.size());
REQUIRE(buf.size() == payload.size());
REQUIRE(buf.capacity() == payload.size());
std::memcpy(buf.data(), payload.data(), payload.size() * sizeof(u64));
for (size_t i = 0; i < payload.size(); ++i) {
REQUIRE(buf[i] == payload[i]);
}
// Increasing the size should reallocate the buffer
buf.resize(payload.size() * 2);
REQUIRE(buf.size() == payload.size() * 2);
REQUIRE(buf.capacity() == payload.size() * 2);
// resize() keeps the previous data intact
for (size_t i = 0; i < payload.size(); ++i) {
REQUIRE(buf[i] == payload[i]);
}
}
TEST_CASE("ScratchBuffer: resize Shrink", "[common]") {
std::array<u8, 10> payload;
payload.fill(66);

View file

@ -1926,7 +1926,7 @@ std::span<const u8> BufferCache<P>::ImmediateBufferWithData(VAddr cpu_addr, size
template <class P>
std::span<u8> BufferCache<P>::ImmediateBuffer(size_t wanted_capacity) {
immediate_buffer_alloc.resize(wanted_capacity);
immediate_buffer_alloc.resize_destructive(wanted_capacity);
return std::span<u8>(immediate_buffer_alloc.data(), wanted_capacity);
}

View file

@ -74,7 +74,7 @@ bool DmaPusher::Step() {
}
// Push buffer non-empty, read a word
command_headers.resize(command_list_header.size);
command_headers.resize_destructive(command_list_header.size);
if (Settings::IsGPULevelHigh()) {
memory_manager.ReadBlock(dma_get, command_headers.data(),
command_list_header.size * sizeof(u32));

View file

@ -24,7 +24,7 @@ void State::BindRasterizer(VideoCore::RasterizerInterface* rasterizer_) {
void State::ProcessExec(const bool is_linear_) {
write_offset = 0;
copy_size = regs.line_length_in * regs.line_count;
inner_buffer.resize(copy_size);
inner_buffer.resize_destructive(copy_size);
is_linear = is_linear_;
}
@ -70,7 +70,7 @@ void State::ProcessData(std::span<const u8> read_buffer) {
const std::size_t dst_size = Tegra::Texture::CalculateSize(
true, bytes_per_pixel, width, regs.dest.height, regs.dest.depth,
regs.dest.BlockHeight(), regs.dest.BlockDepth());
tmp_buffer.resize(dst_size);
tmp_buffer.resize_destructive(dst_size);
memory_manager.ReadBlock(address, tmp_buffer.data(), dst_size);
Tegra::Texture::SwizzleSubrect(tmp_buffer, read_buffer, bytes_per_pixel, width,
regs.dest.height, regs.dest.depth, x_offset, regs.dest.y,

View file

@ -184,8 +184,8 @@ void MaxwellDMA::CopyBlockLinearToPitch() {
const size_t src_size =
CalculateSize(true, bytes_per_pixel, width, height, depth, block_height, block_depth);
read_buffer.resize(src_size);
write_buffer.resize(dst_size);
read_buffer.resize_destructive(src_size);
write_buffer.resize_destructive(dst_size);
memory_manager.ReadBlock(regs.offset_in, read_buffer.data(), src_size);
memory_manager.ReadBlock(regs.offset_out, write_buffer.data(), dst_size);
@ -231,8 +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;
read_buffer.resize(src_size);
write_buffer.resize(dst_size);
read_buffer.resize_destructive(src_size);
write_buffer.resize_destructive(dst_size);
memory_manager.ReadBlock(regs.offset_in, read_buffer.data(), src_size);
if (Settings::IsGPULevelExtreme()) {
@ -261,8 +261,8 @@ void MaxwellDMA::FastCopyBlockLinearToPitch() {
pos_x = pos_x % x_in_gob;
pos_y = pos_y % 8;
read_buffer.resize(src_size);
write_buffer.resize(dst_size);
read_buffer.resize_destructive(src_size);
write_buffer.resize_destructive(dst_size);
if (Settings::IsGPULevelExtreme()) {
memory_manager.ReadBlock(regs.offset_in + offset, read_buffer.data(), src_size);
@ -321,10 +321,10 @@ void MaxwellDMA::CopyBlockLinearToBlockLinear() {
const u32 pitch = x_elements * bytes_per_pixel;
const size_t mid_buffer_size = pitch * regs.line_count;
read_buffer.resize(src_size);
write_buffer.resize(dst_size);
read_buffer.resize_destructive(src_size);
write_buffer.resize_destructive(dst_size);
intermediate_buffer.resize(mid_buffer_size);
intermediate_buffer.resize_destructive(mid_buffer_size);
memory_manager.ReadBlock(regs.offset_in, read_buffer.data(), src_size);
memory_manager.ReadBlock(regs.offset_out, write_buffer.data(), dst_size);

View file

@ -155,7 +155,7 @@ void Vic::WriteRGBFrame(const AVFrame* frame, const VicConfig& config) {
// swizzle pitch linear to block linear
const u32 block_height = static_cast<u32>(config.block_linear_height_log2);
const auto size = Texture::CalculateSize(true, 4, width, height, 1, block_height, 0);
luma_buffer.resize(size);
luma_buffer.resize_destructive(size);
std::span<const u8> frame_buff(converted_frame_buf_addr, 4 * width * height);
Texture::SwizzleSubrect(luma_buffer, frame_buff, 4, width, height, 1, 0, 0, width, height,
block_height, 0, width * 4);
@ -181,8 +181,8 @@ void Vic::WriteYUVFrame(const AVFrame* frame, const VicConfig& config) {
const auto stride = static_cast<size_t>(frame->linesize[0]);
luma_buffer.resize(aligned_width * surface_height);
chroma_buffer.resize(aligned_width * surface_height / 2);
luma_buffer.resize_destructive(aligned_width * surface_height);
chroma_buffer.resize_destructive(aligned_width * surface_height / 2);
// Populate luma buffer
const u8* luma_src = frame->data[0];