[host] dxgi: finish downsample support for d3d11 backend

host/platform/Windows/capture/DXGI/src/d3d11.c

@@ -61,21 +61,11 @@ static bool d3d11_create(struct DXGIInterface * intf)
 
   this->avgMapTime = runningavg_new(10);
 
-  const bool downsample =
-    dxgi->targetWidth  == dxgi->width  / 2 &&
-    dxgi->targetHeight == dxgi->height / 2;
-
-  if (!downsample)
-  {
-    dxgi->targetWidth  = dxgi->width;
-    dxgi->targetHeight = dxgi->height;
-  }
-
   D3D11_TEXTURE2D_DESC gpuTexDesc =
   {
     .Width              = dxgi->width,
     .Height             = dxgi->height,
-    .MipLevels          = 2,
+    .MipLevels          = dxgi->downsampleLevel + 1,
     .ArraySize          = 1,
     .SampleDesc.Count   = 1,
     .SampleDesc.Quality = 0,
@@ -121,7 +111,7 @@ static bool d3d11_create(struct DXGIInterface * intf)
       goto fail;
     }
 
-    if (!downsample)
+    if (!dxgi->downsampleLevel)
       continue;
 
     status = ID3D11Device_CreateTexture2D(dxgi->device, &gpuTexDesc, NULL,
@@ -216,15 +206,15 @@ static bool d3d11_copyFrame(Texture * tex, ID3D11Texture2D * src)
         FrameDamageRect * rect = tex->texDamageRects + i;
         D3D11_BOX box =
         {
-          .left   = rect->x,
-          .top    = rect->y,
+          .left   = rect->x << dxgi->downsampleLevel,
+          .top    = rect->y << dxgi->downsampleLevel,
           .front  = 0,
           .back   = 1,
-          .right  = rect->x + rect->width,
-          .bottom = rect->y + rect->height,
+          .right  = (rect->x + rect->width ) << dxgi->downsampleLevel,
+          .bottom = (rect->y + rect->height) << dxgi->downsampleLevel,
         };
         ID3D11DeviceContext_CopySubresourceRegion(dxgi->deviceContext,
-          (ID3D11Resource *)dst, 0, rect->x, rect->y, 0,
+          (ID3D11Resource *)dst, 0, box.left, box.top, 0,
           (ID3D11Resource *)src, 0, &box);
       }
     }
@@ -232,11 +222,10 @@ static bool d3d11_copyFrame(Texture * tex, ID3D11Texture2D * src)
     if (teximpl->gpu)
     {
       ID3D11DeviceContext_GenerateMips(dxgi->deviceContext, teximpl->srv);
-
       if (tex->texDamageCount < 0)
         ID3D11DeviceContext_CopySubresourceRegion(dxgi->deviceContext,
           (ID3D11Resource *)teximpl->cpu, 0, 0, 0, 0,
-          (ID3D11Resource *)dst         , 1, NULL);
+          (ID3D11Resource *)dst         , dxgi->downsampleLevel, NULL);
       else
       {
         for (int i = 0; i < tex->texDamageCount; ++i)
@@ -244,17 +233,17 @@ static bool d3d11_copyFrame(Texture * tex, ID3D11Texture2D * src)
           FrameDamageRect * rect = tex->texDamageRects + i;
           D3D11_BOX box =
           {
-            .left   = rect->x / 2,
-            .top    = rect->y / 2,
+            .left   = rect->x,
+            .top    = rect->y,
             .front  = 0,
             .back   = 1,
-            .right  = (rect->x + rect->width ) / 2,
-            .bottom = (rect->y + rect->height) / 2,
+            .right  = rect->x + rect->width ,
+            .bottom = rect->y + rect->height,
           };
 
           ID3D11DeviceContext_CopySubresourceRegion(dxgi->deviceContext,
-            (ID3D11Resource *)teximpl->cpu, 0, rect->x / 2, rect->y / 2, 0,
-            (ID3D11Resource *)dst         , 1, &box);
+            (ID3D11Resource *)teximpl->cpu, 0, box.left, box.top, 0,
+            (ID3D11Resource *)dst         , dxgi->downsampleLevel, &box);
         }
       }
     }

host/platform/Windows/capture/DXGI/src/dxgi.c

@@ -29,6 +29,7 @@
 #include "common/rects.h"
 #include "common/runningavg.h"
 #include "common/KVMFR.h"
+#include "common/vector.h"
 
 #include <stdatomic.h>
 #include <unistd.h>
@@ -45,6 +46,18 @@
 
 #define LOCKED(...) INTERLOCKED_SECTION(this->deviceContextLock, __VA_ARGS__)
 
+typedef struct
+{
+  unsigned int id;
+  bool         greater;
+  unsigned int x;
+  unsigned int y;
+  unsigned int level;
+}
+DownsampleRule;
+
+static Vector downsampleRules = {0};
+
 // locals
 static struct DXGIInterface * this = NULL;
 
@@ -73,6 +86,58 @@ static const char * dxgi_getName(void)
   return name;
 }
 
+static bool downsampleOptParser(struct Option * opt, const char * str)
+{
+  if (!str)
+    return false;
+
+  opt->value.x_string = strdup(str);
+
+  if (downsampleRules.data)
+    vector_destroy(&downsampleRules);
+
+  if (!vector_create(&downsampleRules, sizeof(DownsampleRule), 10))
+  {
+    DEBUG_ERROR("Failed to allocate ram");
+    return false;
+  }
+
+  char * tmp   = strdup(str);
+  char * token = strtok(tmp, ",");
+  int count = 0;
+  while(token)
+  {
+    DownsampleRule rule = {0};
+    if (token[0] == '>')
+    {
+      rule.greater = true;
+      ++token;
+    }
+
+    if (sscanf(token, "%ux%u:%u", &rule.x, &rule.y, &rule.level) != 3)
+      return false;
+
+    rule.id = count++;
+
+    DEBUG_INFO(
+      "Rule %u: %u%% IF X %s %4u %s Y %s %4u",
+      rule.id,
+      100 / (1 << rule.level),
+      rule.greater ? "> "  : "==",
+      rule.x,
+      rule.greater ? "OR " : "AND",
+      rule.greater ? "> "  : "==",
+      rule.y
+    );
+    vector_push(&downsampleRules, &rule);
+
+    token = strtok(NULL, ",");
+  }
+  free(tmp);
+
+  return true;
+}
+
 static void dxgi_initOptions(void)
 {
   struct Option options[] =
@@ -91,6 +156,14 @@ static void dxgi_initOptions(void)
       .type           = OPTION_TYPE_STRING,
       .value.x_string = NULL
     },
+    {
+      .module         = "dxgi",
+      .name           = "downsample", //dxgi:downsample=1920x1200:1,
+      .description    = "Downsample conditions and levels, format: [>](width)x(height):level",
+      .type           = OPTION_TYPE_STRING,
+      .value.x_string = NULL,
+      .parser         = downsampleOptParser
+    },
     {
       .module         = "dxgi",
       .name           = "maxTextures",
@@ -390,16 +463,6 @@ static bool dxgi_init(void)
       break;
   }
 
-  this->targetWidth  = this->width;
-  this->targetHeight = this->height;
-
-  //TODO: add logic here
-  if (this->width > 1920 && this->height > 1200)
-  {
-    this->targetWidth  /= 2;
-    this->targetHeight /= 2;
-  }
-
   switch(outputDesc.Rotation)
   {
     case DXGI_MODE_ROTATION_ROTATE90:
@@ -423,7 +486,6 @@ static bool dxgi_init(void)
 
   DEBUG_INFO("Feature Level     : 0x%x"   , this->featureLevel);
   DEBUG_INFO("Capture Size      : %u x %u", this->width, this->height);
-  DEBUG_INFO("Target Size       : %u x %u", this->targetWidth, this->targetHeight);
   DEBUG_INFO("AcquireLock       : %s"     , this->useAcquireLock ? "enabled" : "disabled");
   DEBUG_INFO("Debug mode        : %s"     , this->debug ? "enabled" : "disabled");
 
@@ -536,6 +598,26 @@ static bool dxgi_init(void)
       goto fail;
   }
 
+  this->targetWidth  = this->width;
+  this->targetHeight = this->height;
+
+  DownsampleRule * rule;
+  vector_forEachRef(rule, &downsampleRules)
+  {
+    if (
+      ( rule->greater && (this->width  > rule->x || this->height  > rule->y)) ||
+      (!rule->greater && (this->width == rule->x && this->height == rule->y)))
+    {
+      DEBUG_INFO("Matched downsample rule %d", rule->id);
+      this->downsampleLevel = rule->level;
+      this->targetWidth   >>= rule->level;
+      this->targetHeight  >>= rule->level;
+      break;
+    }
+  }
+
+  DEBUG_INFO("Request Size      : %u x %u", this->targetWidth, this->targetHeight);
+
   const char * copyBackend = option_get_string("dxgi", "copyBackend");
   for (int i = 0; i < ARRAY_LENGTH(backends); ++i)
   {
@@ -552,6 +634,8 @@ static bool dxgi_init(void)
     }
   }
 
+  DEBUG_INFO("Output Size       : %u x %u", this->targetWidth, this->targetHeight);
+
   if (!this->backend)
   {
     DEBUG_ERROR("Could not find copy backend: %s", copyBackend);
@@ -699,10 +783,10 @@ static void rectToFrameDamageRect(RECT * src, FrameDamageRect * dst)
 {
   *dst = (FrameDamageRect)
   {
-    .x = src->left,
-    .y = src->top,
-    .width = src->right - src->left,
-    .height = src->bottom - src->top
+    .x      = src->left                >> this->downsampleLevel,
+    .y      = src->top                 >> this->downsampleLevel,
+    .width  = (src->right - src->left) >> this->downsampleLevel,
+    .height = (src->bottom - src->top) >> this->downsampleLevel
   };
 }
 

host/platform/Windows/capture/DXGI/src/dxgi_capture.h

@@ -95,6 +95,7 @@ struct DXGIInterface
   unsigned int    formatVer;
   unsigned int    width , targetWidth ;
   unsigned int    height, targetHeight;
+  unsigned int    downsampleLevel;
   unsigned int    pitch;
   unsigned int    stride;
   unsigned int    bpp;