From 3e6663da433d98a0bf4db1256ea3ccdefd404a0c Mon Sep 17 00:00:00 2001
From: Yuri Kunde Schlesner <yuriks@yuriks.net>
Date: Sun, 7 Jun 2015 22:24:03 -0300
Subject: Y2R: Rework conversion process, enabling support for all formats

---
 src/core/hle/service/y2r_u.h | 96 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)

(limited to 'src/core/hle/service/y2r_u.h')

diff --git a/src/core/hle/service/y2r_u.h b/src/core/hle/service/y2r_u.h
index 171aecfd..7df47fcb 100644
--- a/src/core/hle/service/y2r_u.h
+++ b/src/core/hle/service/y2r_u.h
@@ -4,6 +4,10 @@
 
 #pragma once
 
+#include <array>
+
+#include "common/common_types.h"
+
 #include "core/hle/service/service.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -11,6 +15,98 @@
 
 namespace Y2R_U {
 
+enum class InputFormat : u8 {
+    /// 8-bit input, with YUV components in separate planes and 4:2:2 subsampling.
+    YUV422_Indiv8 = 0,
+    /// 8-bit input, with YUV components in separate planes and 4:2:0 subsampling.
+    YUV420_Indiv8 = 1,
+
+    /// 16-bit input (only LSB used), with YUV components in separate planes and 4:2:2 subsampling.
+    YUV422_Indiv16 = 2,
+    /// 16-bit input (only LSB used), with YUV components in separate planes and 4:2:0 subsampling.
+    YUV420_Indiv16 = 3,
+
+    /// 8-bit input, with a single interleaved stream in YUYV format and 4:2:2 subsampling.
+    YUYV422_Interleaved = 4,
+};
+
+enum class OutputFormat : u8 {
+    RGBA8 = 0,
+    RGB8 = 1,
+    RGB5A1 = 2,
+    RGB565 = 3,
+};
+
+enum class Rotation : u8 {
+    None = 0,
+    Clockwise_90 = 1,
+    Clockwise_180 = 2,
+    Clockwise_270 = 3,
+};
+
+enum class BlockAlignment : u8 {
+    /// Image is output in linear format suitable for use as a framebuffer.
+    Linear = 0,
+    /// Image is output in tiled PICA format, suitable for use as a texture.
+    Block8x8 = 1,
+};
+
+enum class StandardCoefficient : u8 {
+    /// ITU Rec. BT.601 primaries, with PC ranges.
+    ITU_Rec601 = 0,
+    /// ITU Rec. BT.709 primaries, with PC ranges.
+    ITU_Rec709 = 1,
+    /// ITU Rec. BT.601 primaries, with TV ranges.
+    ITU_Rec601_Scaling = 2,
+    /// ITU Rec. BT.709 primaries, with TV ranges.
+    ITU_Rec709_Scaling = 3,
+};
+
+/**
+ * A set of coefficients configuring the RGB to YUV conversion. Coefficients 0-4 are unsigned 2.8
+ * fixed pointer numbers representing entries on the conversion matrix, while coefficient 5-7 are
+ * signed 11.5 fixed point numbers added as offsets to the RGB result.
+ *
+ * The overall conversion process formula is:
+ * ```
+ * R = trunc((c_0 * Y           + c_1 * V) + c_5 + 0.75)
+ * G = trunc((c_0 * Y - c_3 * U - c_2 * V) + c_6 + 0.75)
+ * B = trunc((c_0 * Y + c_4 * U          ) + c_7 + 0.75)
+ * ```
+ */
+using CoefficientSet = std::array<s16, 8>;
+
+struct ConversionBuffer {
+    /// Current reading/writing address of this buffer.
+    VAddr address;
+    /// Remaining amount of bytes to be DMAed, does not include the inter-trasfer gap.
+    u32 image_size;
+    /// Size of a single DMA transfer.
+    u16 transfer_unit;
+    /// Amount of bytes to be skipped between copying each `transfer_unit` bytes.
+    u16 gap;
+};
+
+struct ConversionConfiguration {
+    InputFormat input_format;
+    OutputFormat output_format;
+    Rotation rotation;
+    BlockAlignment block_alignment;
+    u16 input_line_width;
+    u16 input_lines;
+    CoefficientSet coefficients;
+    u16 alpha;
+
+    /// Input parameters for the Y (luma) plane
+    ConversionBuffer src_Y, src_U, src_V, src_YUYV;
+    /// Output parameters for the conversion results
+    ConversionBuffer dst;
+
+    ResultCode SetInputLineWidth(u16 width);
+    ResultCode SetInputLines(u16 lines);
+    ResultCode SetStandardCoefficient(StandardCoefficient standard_coefficient);
+};
+
 class Interface : public Service::Interface {
 public:
     Interface();
-- 
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