From bf3e50ffa0bb829c3486a44a0a858e9968f67b9a Mon Sep 17 00:00:00 2001
From: Ynse Hoornenborg <github@ynse.nl>
Date: Tue, 5 Nov 2024 20:48:40 +0100
Subject: [PATCH] Add some SVT references

---
 .../Heif/Av1/Pipeline/Av1FrameDecoder.cs      | 19 +++--
 .../Heif/Av1/Pipeline/Av1FrameEncoder.cs      | 74 +++++++++++++++++++
 2 files changed, 86 insertions(+), 7 deletions(-)
 create mode 100644 src/ImageSharp/Formats/Heif/Av1/Pipeline/Av1FrameEncoder.cs

diff --git a/src/ImageSharp/Formats/Heif/Av1/Pipeline/Av1FrameDecoder.cs b/src/ImageSharp/Formats/Heif/Av1/Pipeline/Av1FrameDecoder.cs
index 77c69df3f7..06946271af 100644
--- a/src/ImageSharp/Formats/Heif/Av1/Pipeline/Av1FrameDecoder.cs
+++ b/src/ImageSharp/Formats/Heif/Av1/Pipeline/Av1FrameDecoder.cs
@@ -39,7 +39,11 @@ internal class Av1FrameDecoder
         bool doLoopFilterFlag = false;
         bool doLoopRestoration = false;
         bool doUpscale = false;
-        this.DecodeLoopFilterForFrame(doLoopFilterFlag);
+        if (doLoopFilterFlag)
+        {
+            this.DecodeLoopFilterForFrame();
+        }
+
         if (doLoopRestoration)
         {
             // LoopRestorationSaveBoundaryLines(false);
@@ -56,6 +60,9 @@ internal class Av1FrameDecoder
         // PadPicture();
     }
 
+    /// <summary>
+    /// SVT: decode_tile
+    /// </summary>
     private void DecodeFrameTiles(int tileColumn)
     {
         int tileRowCount = this.frameHeader.TilesInfo.TileRowCount;
@@ -74,6 +81,9 @@ internal class Av1FrameDecoder
         }
     }
 
+    /// <summary>
+    /// SVT: decode_tile_row
+    /// </summary>
     private void DecodeTileRow(int tileRow, int tileColumn, int modeInfoRow, int superblockRow)
     {
         int superblockModeInfoSizeLog2 = this.sequenceHeader.SuperblockSizeLog2 - Av1Constants.ModeInfoSizeLog2;
@@ -122,13 +132,8 @@ internal class Av1FrameDecoder
         }
     }
 
-    private void DecodeLoopFilterForFrame(bool doLoopFilterFlag)
+    private void DecodeLoopFilterForFrame()
     {
-        if (!doLoopFilterFlag)
-        {
-            return;
-        }
-
         int superblockSizeLog2 = this.sequenceHeader.SuperblockSizeLog2;
         int pictureWidthInSuperblocks = Av1Math.DivideLog2Ceiling(this.frameHeader.FrameSize.FrameWidth, this.sequenceHeader.SuperblockSizeLog2);
         int pictureHeightInSuperblocks = Av1Math.DivideLog2Ceiling(this.frameHeader.FrameSize.FrameHeight, this.sequenceHeader.SuperblockSizeLog2);
diff --git a/src/ImageSharp/Formats/Heif/Av1/Pipeline/Av1FrameEncoder.cs b/src/ImageSharp/Formats/Heif/Av1/Pipeline/Av1FrameEncoder.cs
new file mode 100644
index 0000000000..90529ab1fd
--- /dev/null
+++ b/src/ImageSharp/Formats/Heif/Av1/Pipeline/Av1FrameEncoder.cs
@@ -0,0 +1,74 @@
+// Copyright (c) Six Labors.
+// Licensed under the Six Labors Split License.
+
+using SixLabors.ImageSharp.Formats.Heif.Av1.Tiling;
+
+namespace SixLabors.ImageSharp.Formats.Heif.Av1.Pipeline;
+
+internal class Av1FrameEncoder
+{
+    private readonly Av1FrameBuffer frameBuffer;
+
+    public Av1FrameEncoder(Av1FrameBuffer frameBuffer)
+    {
+        this.frameBuffer = frameBuffer;
+    }
+
+    /// <summary>
+    /// SVT: svt_av1_enc_init
+    /// </summary>
+    public static void Encode()
+    {
+        /************************************
+        * Thread Handles
+        ************************************/
+
+        // Resource Coordination
+        // Single thread calling svt_aom_resource_coordination_kernel with context enc_handle_ptr->resource_coordination_context_ptr
+        // Multiple threads calling svt_aom_picture_analysis_kernel, with context enc_handle_ptr->picture_analysis_context_ptr_array
+
+        // Picture Decision
+        // Single thread calling svt_aom_picture_decision_kernel with context enc_handle_ptr->picture_decision_context_ptr
+
+        // Motion Estimation
+        // Multiple threads calling svt_aom_motion_estimation_kernel with context enc_handle_ptr->motion_estimation_context_ptr_array
+
+        // Initial Rate Control
+        // Single thread calling svt_aom_initial_rate_control_kernel with context enc_handle_ptr->initial_rate_control_context_ptr
+
+        // Source Based Oprations
+        // <Multiple threads calling svt_aom_source_based_operations_kernel with context enc_handle_ptr->source_based_operations_context_ptr_array
+
+        // TPL dispenser
+        // Multiple threads calling svt_aom_tpl_disp_kernel with context enc_handle_ptr->tpl_disp_context_ptr_array
+
+        // Picture Manager
+        // Single thread calling svt_aom_picture_manager_kernel with context enc_handle_ptr->picture_manager_context_ptr
+
+        // Rate Control
+        // Single thread calling svt_aom_rate_control_kernel with context enc_handle_ptr->rate_control_context_ptr
+
+        // Mode Decision Configuration Process
+        // Multiple threads calling svt_aom_mode_decision_configuration_kernel with context enc_handle_ptr->mode_decision_configuration_context_ptr_array
+
+        // EncDec Process
+        // Multiple threads calling svt_aom_mode_decision_kernel enc_handle_ptr->enc_dec_context_ptr_array
+
+        // Dlf Process
+        // Multiple threads calling svt_aom_dlf_kernel with context enc_handle_ptr->dlf_context_ptr_array
+
+        // Cdef Process
+        // Multiple threads calling svt_aom_cdef_kernel enc_handle_ptr->cdef_context_ptr_array
+
+        // Rest Process
+        // Multiple threads calling svt_aom_rest_kernel enc_handle_ptr->rest_context_ptr_array
+
+        // Entropy Coding Process
+        // Multiple threads calling svt_aom_entropy_coding_kernel enc_handle_ptr->entropy_coding_context_ptr_array
+
+        // Packetization
+        // Single thread calling svt_aom_packetization_kernel with context enc_handle_ptr->packetization_context_ptr
+
+        // svt_print_memory_usage();
+    }
+}