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	Service::Y2R: Support for grayscale decoding of specific formats
Implements unrotated planar YUV 4:2:0 -> RGB24 conversions in Y2R. Currently only the Y (luma) channel is used, so the results don't contain color. This will be added in a later PR at some point. This is enough to get all currently know Moflex videos to decode. (Some don't display on-screen due to seemingly unrelated reasons.) Thanks to @archshift for doing the initial implementation which I cleaned up and then fixed the 8x8 block mode.
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					 3 changed files with 268 additions and 36 deletions
				
			
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// Copyright 2014 Citra Emulator Project
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// Copyright 2015 Citra 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 <cstring>
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#include "common/logging/log.h"
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#include "core/hle/hle.h"
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#include "core/hle/kernel/event.h"
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#include "core/hle/service/y2r_u.h"
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#include "video_core/utils.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Namespace Y2R_U
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namespace Y2R_U {
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enum class InputFormat {
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    /// 8-bit input, with YUV components in separate planes and using 4:2:2 subsampling.
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    YUV422_Indiv8 = 0,
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    /// 8-bit input, with YUV components in separate planes and using 4:2:0 subsampling.
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    YUV420_Indiv8 = 1,
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    YUV422_INDIV_16 = 2,
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    YUV420_INDIV_16 = 3,
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    YUV422_BATCH = 4,
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};
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enum class OutputFormat {
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    Rgb32 = 0,
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    Rgb24 = 1,
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    Rgb16_555 = 2,
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    Rgb16_565 = 3,
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};
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enum class Rotation {
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    None = 0,
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    Clockwise_90 = 1,
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    Clockwise_180 = 2,
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    Clockwise_270 = 3,
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};
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enum class BlockAlignment {
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    /// Image is output in linear format suitable for use as a framebuffer.
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    Linear = 0,
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    /// Image is output in tiled PICA format, suitable for use as a texture.
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    Block8x8 = 1,
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};
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enum class StandardCoefficient {
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    ITU_Rec601 = 0,
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    ITU_Rec709 = 1,
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    ITU_Rec601_Scaling = 2,
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    ITU_Rec709_Scaling = 3,
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};
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static Kernel::SharedPtr<Kernel::Event> completion_event;
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/**
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 * Y2R_U::IsBusyConversion service function
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 *  Outputs:
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 *      1 : Result of function, 0 on success, otherwise error code
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 *      2 : Whether the current conversion is of type busy conversion (?)
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 */
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static void IsBusyConversion(Service::Interface* self) {
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struct ConversionParameters {
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    InputFormat input_format;
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    OutputFormat output_format;
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    Rotation rotation;
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    BlockAlignment alignment;
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    u16 input_line_width;
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    u16 input_lines;
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    // Input parameters for the Y (luma) plane
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    VAddr srcY_address;
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    u32 srcY_image_size;
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    u16 srcY_transfer_unit;
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    u16 srcY_stride;
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    // Output parameters for the conversion results
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    VAddr dst_address;
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    u32 dst_image_size;
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    u16 dst_transfer_unit;
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    u16 dst_stride;
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};
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static ConversionParameters conversion_params;
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static void SetInputFormat(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    cmd_buff[1] = RESULT_SUCCESS.raw;;
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    cmd_buff[2] = 0;
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    conversion_params.input_format = static_cast<InputFormat>(cmd_buff[1]);
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    LOG_DEBUG(Service_Y2R, "called input_format=%u", conversion_params.input_format);
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    LOG_WARNING(Service, "(STUBBED) called");
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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}
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static void SetOutputFormat(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    conversion_params.output_format = static_cast<OutputFormat>(cmd_buff[1]);
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    LOG_DEBUG(Service_Y2R, "called output_format=%u", conversion_params.output_format);
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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}
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static void SetRotation(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    conversion_params.rotation = static_cast<Rotation>(cmd_buff[1]);
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    LOG_DEBUG(Service_Y2R, "called rotation=%u", conversion_params.rotation);
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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}
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static void SetBlockAlignment(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    conversion_params.alignment = static_cast<BlockAlignment>(cmd_buff[1]);
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    LOG_DEBUG(Service_Y2R, "called alignment=%u", conversion_params.alignment);
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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}
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/**
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 * Y2R_U::GetTransferEndEvent service function
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 *  Outputs:
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 *      1 : Result of function, 0 on success, otherwise error code
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 *      3 : The handle of the completion event
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 */
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* Y2R_U::GetTransferEndEvent service function
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*  Outputs:
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*      1 : Result of function, 0 on success, otherwise error code
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*      3 : The handle of the completion event
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*/
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static void GetTransferEndEvent(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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    cmd_buff[3] = Kernel::g_handle_table.Create(completion_event).MoveFrom();
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    LOG_DEBUG(Service_Y2R, "called");
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}
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static void SetSendingY(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    conversion_params.srcY_address = cmd_buff[1];
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    conversion_params.srcY_image_size = cmd_buff[2];
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    conversion_params.srcY_transfer_unit = cmd_buff[3];
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    conversion_params.srcY_stride = cmd_buff[4];
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    u32 src_process_handle = cmd_buff[6];
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    LOG_DEBUG(Service_Y2R, "called image_size=0x%08X, transfer_unit=%hu, transfer_stride=%hu, "
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        "src_process_handle=0x%08X", conversion_params.srcY_image_size,
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        conversion_params.srcY_transfer_unit, conversion_params.srcY_stride, src_process_handle);
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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}
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static void SetReceiving(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    conversion_params.dst_address = cmd_buff[1];
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    conversion_params.dst_image_size = cmd_buff[2];
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    conversion_params.dst_transfer_unit = cmd_buff[3];
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    conversion_params.dst_stride = cmd_buff[4];
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    u32 dst_process_handle = cmd_buff[6];
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    LOG_DEBUG(Service_Y2R, "called image_size=0x%08X, transfer_unit=%hu, transfer_stride=%hu, "
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        "dst_process_handle=0x%08X", conversion_params.dst_image_size,
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        conversion_params.dst_transfer_unit, conversion_params.dst_stride,
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        dst_process_handle);
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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}
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static void SetInputLineWidth(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    conversion_params.input_line_width = cmd_buff[1];
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    LOG_DEBUG(Service_Y2R, "input_line_width=%u", conversion_params.input_line_width);
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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}
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static void SetInputLines(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    conversion_params.input_lines = cmd_buff[1];
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    LOG_DEBUG(Service_Y2R, "input_line_number=%u", conversion_params.input_lines);
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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}
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/**
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 * Starts a YUV -> RGB conversion
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 */
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static void StartConversion(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    // TODO(bunnei): This is hack to indicate to the game that the conversion has immediately
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    // completed, even though it's not actually implemented yet. This fixes games that would
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    // otherwise hang on trying to play moflex videos, which uses the Y2R service.
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    completion_event->Signal();
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    const u8* srcY_buffer = Memory::GetPointer(conversion_params.srcY_address);
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    u8* dst_buffer = Memory::GetPointer(conversion_params.dst_address);
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    LOG_WARNING(Service, "(STUBBED) called, expect blank video (MOFLEX) output!");
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    // TODO: support color and other kinds of conversions
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    ASSERT(conversion_params.input_format == InputFormat::YUV422_Indiv8
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        || conversion_params.input_format == InputFormat::YUV420_Indiv8);
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    ASSERT(conversion_params.output_format == OutputFormat::Rgb24);
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    ASSERT(conversion_params.rotation == Rotation::None);
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    const int bpp = 3;
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    switch (conversion_params.alignment) {
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    case BlockAlignment::Linear:
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    {
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        const size_t input_lines = conversion_params.input_lines;
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        const size_t input_line_width = conversion_params.input_line_width;
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        const size_t srcY_stride = conversion_params.srcY_stride;
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        const size_t dst_stride = conversion_params.dst_stride;
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        size_t srcY_offset = 0;
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        size_t dst_offset = 0;
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        for (size_t line = 0; line < input_lines; ++line) {
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            for (size_t i = 0; i < input_line_width; ++i) {
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                u8 Y = srcY_buffer[srcY_offset];
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                dst_buffer[dst_offset + 0] = Y;
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                dst_buffer[dst_offset + 1] = Y;
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                dst_buffer[dst_offset + 2] = Y;
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                srcY_offset += 1;
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                dst_offset += bpp;
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            }
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            srcY_offset += srcY_stride;
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            dst_offset += dst_stride;
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        }
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        break;
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    }
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    case BlockAlignment::Block8x8:
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    {
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        const size_t input_lines = conversion_params.input_lines;
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        const size_t input_line_width = conversion_params.input_line_width;
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        const size_t srcY_stride = conversion_params.srcY_stride;
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        const size_t dst_transfer_unit = conversion_params.dst_transfer_unit;
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        const size_t dst_stride = conversion_params.dst_stride;
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        size_t srcY_offset = 0;
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        size_t dst_tile_line_offs = 0;
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        const size_t tile_size = 8 * 8 * bpp;
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        for (size_t line = 0; line < input_lines;) {
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            size_t tile_y = line / 8;
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            size_t max_line = line + 8;
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            for (; line < max_line; ++line) {
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                for (size_t x = 0; x < input_line_width; ++x) {
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                    size_t tile_x = x / 8;
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                    size_t dst_tile_offs = dst_tile_line_offs + tile_x * tile_size;
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                    size_t tile_i = VideoCore::MortonInterleave((u32)x, (u32)line);
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                    size_t dst_offset = dst_tile_offs + tile_i * bpp;
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                    u8 Y = srcY_buffer[srcY_offset];
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                    dst_buffer[dst_offset + 0] = Y;
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                    dst_buffer[dst_offset + 1] = Y;
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                    dst_buffer[dst_offset + 2] = Y;
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                    srcY_offset += 1;
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                }
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                srcY_offset += srcY_stride;
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            }
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            dst_tile_line_offs += dst_transfer_unit + dst_stride;
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        }
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        break;
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    }
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    }
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    LOG_DEBUG(Service_Y2R, "called");
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    completion_event->Signal();
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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}
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/**
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* Y2R_U::IsBusyConversion service function
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*  Outputs:
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*      1 : Result of function, 0 on success, otherwise error code
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*      2 : 1 if there's a conversion running, otherwise 0.
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*/
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static void IsBusyConversion(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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    cmd_buff[2] = 0; // StartConversion always finishes immediately
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    LOG_DEBUG(Service_Y2R, "called");
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}
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static void PingProcess(Service::Interface* self) {
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    u32* cmd_buff = Kernel::GetCommandBuffer();
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    cmd_buff[1] = RESULT_SUCCESS.raw;
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    cmd_buff[2] = 0;
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    LOG_WARNING(Service_Y2R, "(STUBBED) called");
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}
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const Interface::FunctionInfo FunctionTable[] = {
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    {0x00010040, nullptr,                 "SetInputFormat"},
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    {0x00030040, nullptr,                 "SetOutputFormat"},
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    {0x00050040, nullptr,                 "SetRotation"},
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    {0x00070040, nullptr,                 "SetBlockAlignment"},
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    {0x00010040, SetInputFormat,          "SetInputFormat"},
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    {0x00030040, SetOutputFormat,         "SetOutputFormat"},
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    {0x00050040, SetRotation,             "SetRotation"},
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    {0x00070040, SetBlockAlignment,       "SetBlockAlignment"},
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    {0x000D0040, nullptr,                 "SetTransferEndInterrupt"},
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    {0x000F0000, GetTransferEndEvent,     "GetTransferEndEvent"},
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    {0x00100102, nullptr,                 "SetSendingY"},
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    {0x00100102, SetSendingY,             "SetSendingY"},
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    {0x00110102, nullptr,                 "SetSendingU"},
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    {0x00120102, nullptr,                 "SetSendingV"},
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    {0x00180102, nullptr,                 "SetReceiving"},
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    {0x001A0040, nullptr,                 "SetInputLineWidth"},
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    {0x001C0040, nullptr,                 "SetInputLines"},
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    {0x00180102, SetReceiving,            "SetReceiving"},
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    {0x001A0040, SetInputLineWidth,       "SetInputLineWidth"},
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    {0x001C0040, SetInputLines,           "SetInputLines"},
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    {0x00200040, nullptr,                 "SetStandardCoefficient"},
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    {0x00220040, nullptr,                 "SetAlpha"},
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    {0x00260000, StartConversion,         "StartConversion"},
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    {0x00270000, nullptr,                 "StopConversion"},
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    {0x00280000, IsBusyConversion,        "IsBusyConversion"},
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    {0x002A0000, nullptr,                 "PingProcess"},
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    {0x002A0000, PingProcess,             "PingProcess"},
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    {0x002B0000, nullptr,                 "DriverInitialize"},
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    {0x002C0000, nullptr,                 "DriverFinalize"}
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    {0x002C0000, nullptr,                 "DriverFinalize"},
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		||||
};
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		||||
////////////////////////////////////////////////////////////////////////////////////////////////////
 | 
			
		||||
| 
						 | 
				
			
			@ -87,8 +316,9 @@ const Interface::FunctionInfo FunctionTable[] = {
 | 
			
		|||
 | 
			
		||||
Interface::Interface() {
 | 
			
		||||
    completion_event = Kernel::Event::Create(RESETTYPE_ONESHOT, "Y2R:Completed");
 | 
			
		||||
    std::memset(&conversion_params, 0, sizeof(conversion_params));
 | 
			
		||||
 | 
			
		||||
    Register(FunctionTable);
 | 
			
		||||
}
 | 
			
		||||
    
 | 
			
		||||
 | 
			
		||||
} // namespace
 | 
			
		||||
| 
						 | 
				
			
			
 | 
			
		|||
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