[client] implemented initial slow yuv420 support

client/CMakeLists.txt

@@ -53,6 +53,7 @@ set(SOURCES
 	spice/rsa.c
 	spice/spice.c
 	decoders/null.c
+	decoders/yuv420.c
 	renderers/opengl.c
 )
 

client/decoders/yuv420.c

@@ -0,0 +1,172 @@
+/*
+Looking Glass - KVM FrameRelay (KVMFR) Client
+Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
+https://looking-glass.hostfission.com
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include "lg-decoder.h"
+
+#include "debug.h"
+#include "memcpySSE.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#define GL_GLEXT_PROTOTYPES
+#include <GL/gl.h>
+//#include <GL/glu.h>
+//#include <GL/glx.h>
+
+struct Pixel
+{
+  uint8_t b, g, r, a;
+};
+
+struct Inst
+{
+  LG_RendererFormat  format;
+  struct Pixel     * pixels;
+  unsigned int       yBytes;
+};
+
+static bool            lgd_yuv420_create          (void ** opaque);
+static void            lgd_yuv420_destroy         (void  * opaque);
+static bool            lgd_yuv420_initialize      (void  * opaque, const LG_RendererFormat format, SDL_Window * window);
+static void            lgd_yuv420_deinitialize    (void  * opaque);
+static LG_OutFormat    lgd_yuv420_get_out_format  (void  * opaque);
+static unsigned int    lgd_yuv420_get_frame_pitch (void  * opaque);
+static unsigned int    lgd_yuv420_get_frame_stride(void  * opaque);
+static bool            lgd_yuv420_decode          (void  * opaque, const uint8_t * src, size_t srcSize);
+static const uint8_t * lgd_yuv420_get_buffer      (void  * opaque);
+
+static bool lgd_yuv420_create(void ** opaque)
+{
+  // create our local storage
+  *opaque = malloc(sizeof(struct Inst));
+  if (!*opaque)
+  {
+    DEBUG_INFO("Failed to allocate %lu bytes", sizeof(struct Inst));
+    return false;
+  }
+  memset(*opaque, 0, sizeof(struct Inst));
+  return true;
+}
+
+static void lgd_yuv420_destroy(void * opaque)
+{
+  free(opaque);
+}
+
+static bool lgd_yuv420_initialize(void * opaque, const LG_RendererFormat format, SDL_Window * window)
+{
+  struct Inst * this = (struct Inst *)opaque;
+  memcpy(&this->format, &format, sizeof(LG_RendererFormat));
+
+  this->yBytes  = format.width * format.height;
+  this->pixels = malloc(sizeof(struct Pixel) * (format.width * format.height));
+  return true;
+}
+
+static void lgd_yuv420_deinitialize(void * opaque)
+{
+  struct Inst * this = (struct Inst *)opaque;
+  free(this->pixels);
+}
+
+static LG_OutFormat lgd_yuv420_get_out_format(void * opaque)
+{
+  return LG_OUTPUT_BGRA;
+}
+
+static unsigned int lgd_yuv420_get_frame_pitch(void * opaque)
+{
+  struct Inst * this = (struct Inst *)opaque;
+  return this->format.width * 4;
+}
+
+static unsigned int lgd_yuv420_get_frame_stride(void * opaque)
+{
+  struct Inst * this = (struct Inst *)opaque;
+  return this->format.width;
+}
+
+static bool lgd_yuv420_decode(void * opaque, const uint8_t * src, size_t srcSize)
+{
+  //FIXME: implement this properly using GLSL
+
+  struct Inst * this = (struct Inst *)opaque;
+  const unsigned int hw = this->format.width / 2;
+  const unsigned int hp = this->yBytes / 4;
+
+  for(size_t y = 0; y < this->format.height; ++y)
+    for(size_t x = 0; x < this->format.width; ++x)
+    {
+      const unsigned int yoff = y * this->format.width + x;
+      const unsigned int uoff = this->yBytes + ((y / 2) * hw + x / 2);
+      const unsigned int voff = uoff + hp;
+
+      float b = 1.164f * ((float)src[yoff] - 16.0f) + 2.018f * ((float)src[uoff] - 128.0f);
+      float g = 1.164f * ((float)src[yoff] - 16.0f) - 0.813f * ((float)src[voff] - 128.0f) - 0.391f * ((float)src[uoff] - 128.0f);
+      float r = 1.164f * ((float)src[yoff] - 16.0f) + 1.596f * ((float)src[voff] - 128.0f);
+
+      #define CLAMP(x) (x < 0 ? 0 : (x > 255 ? 255 : x))
+      this->pixels[yoff].b = CLAMP(b);
+      this->pixels[yoff].g = CLAMP(g);
+      this->pixels[yoff].r = CLAMP(r);
+    }
+
+  return true;
+}
+
+static const uint8_t * lgd_yuv420_get_buffer(void * opaque)
+{
+  struct Inst * this = (struct Inst *)opaque;
+  return (uint8_t *)this->pixels;
+}
+
+bool lgd_yuv420_init_gl_texture(void * opaque, GLenum target, GLuint texture, void ** ref)
+{
+  return false;
+}
+
+void lgd_yuv420_free_gl_texture(void * opaque, void * ref)
+{
+}
+
+bool lgd_yuv420_update_gl_texture(void * opaque, void * ref)
+{
+  return false;
+}
+
+const LG_Decoder LGD_YUV420 =
+{
+  .name              = "YUV420",
+  .create            = lgd_yuv420_create,
+  .destroy           = lgd_yuv420_destroy,
+  .initialize        = lgd_yuv420_initialize,
+  .deinitialize      = lgd_yuv420_deinitialize,
+  .get_out_format    = lgd_yuv420_get_out_format,
+  .get_frame_pitch   = lgd_yuv420_get_frame_pitch,
+  .get_frame_stride  = lgd_yuv420_get_frame_stride,
+  .decode            = lgd_yuv420_decode,
+  .get_buffer        = lgd_yuv420_get_buffer,
+
+  .has_gl            = false, //FIXME: Implement this
+  .init_gl_texture   = lgd_yuv420_init_gl_texture,
+  .free_gl_texture   = lgd_yuv420_free_gl_texture,
+  .update_gl_texture = lgd_yuv420_update_gl_texture
+};

client/lg-decoders.h

@@ -21,10 +21,12 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 #include "lg-decoder.h"
 
 extern const LG_Decoder LGD_NULL;
+extern const LG_Decoder LGD_YUV420;
 
 const LG_Decoder * LG_Decoders[] =
 {
   &LGD_NULL,
+  &LGD_YUV420,
   NULL // end of array sentinal
 };
 

client/lg-renderer.h

@@ -24,6 +24,8 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 #include <SDL2/SDL.h>
 #include <SDL2/SDL_ttf.h>
 
+#include "KVMFR.h"
+
 #define IS_LG_RENDERER_VALID(x) \
   ((x)->get_name       && \
    (x)->create         && \
@@ -65,16 +67,9 @@ typedef struct LG_RendererParams
 }
 LG_RendererParams;
 
-typedef enum LG_RendererComp
-{
-  LG_COMPRESSION_NONE,
-  LG_COMPRESSION_H264
-}
-LG_RendererComp;
-
 typedef struct LG_RendererFormat
 {
-  LG_RendererComp comp;    // compression format
+  FrameType    type;    // frame type
   unsigned int width;   // image width
   unsigned int height;  // image height
   unsigned int stride;  // scanline width (zero if compresed)

client/main.c

@@ -343,6 +343,7 @@ int frameThread(void * unused)
 
     // setup the renderer format with the frame format details
     LG_RendererFormat lgrFormat;
+    lgrFormat.type   = header.type;
     lgrFormat.width  = header.width;
     lgrFormat.height = header.height;
     lgrFormat.stride = header.stride;
@@ -353,13 +354,17 @@ int frameThread(void * unused)
     {
       case FRAME_TYPE_ARGB:
         dataSize       = lgrFormat.height * lgrFormat.pitch;
-        lgrFormat.comp = LG_COMPRESSION_NONE;
         lgrFormat.bpp  = 32;
         break;
 
+      case FRAME_TYPE_YUV420:
+        dataSize       = lgrFormat.height * lgrFormat.width;
+        dataSize      += (dataSize / 4) * 2;
+        lgrFormat.bpp  = 12;
+        break;
+
       case FRAME_TYPE_H264:
         dataSize      = lgrFormat.pitch;
-        lgrFormat.comp = LG_COMPRESSION_H264;
         lgrFormat.bpp = 0;
         break;
 

client/renderers/opengl.c

@@ -315,7 +315,7 @@ bool opengl_on_frame_event(void * opaque, const LG_RendererFormat format, const
   }
 
   if (!this->configured ||
-    this->format.comp   != format.comp   ||
+    this->format.type   != format.type   ||
     this->format.width  != format.width  ||
     this->format.height != format.height ||
     this->format.stride != format.stride ||
@@ -885,12 +885,16 @@ static bool configure(struct Inst * this, SDL_Window *window)
   if (this->configured)
     deconfigure(this);
 
-  switch(this->format.comp)
+  switch(this->format.type)
   {
-    case LG_COMPRESSION_NONE:
+    case FRAME_TYPE_ARGB:
       this->decoder = &LGD_NULL;
       break;
 
+    case FRAME_TYPE_YUV420:
+      this->decoder = &LGD_YUV420;
+      break;
+
     default:
       DEBUG_ERROR("Unknown/unsupported compression type");
       return false;