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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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424 lines
14 KiB
C
424 lines
14 KiB
C
// these includes don't do a lot in Linux, they are more needed in Win32 (for the OpenGL function call pointers)
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// but they are used at least for checking if the necessary extensions are present
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "ARB_multitexture.h"
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#include "NV_register_combiners.h"
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#include "EXT_paletted_texture.h"
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/***********************************************************************************************
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INTERESTING PART: *
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handles initialization of the Nvidia register combiners for YUV->RGB conversion.
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This code was created by Jens Schneider <schneider@glhint.de>
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***********************************************************************************************/
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GLuint Yhandle;
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GLuint Uhandle;
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GLuint Vhandle;
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unsigned char *YPlane;
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unsigned char *UPlane;
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unsigned char *VPlane;
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// YUV 4:2:2 example
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unsigned int Ywidth = 512, Yheight = 512;
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unsigned int UVwidth = 256, UVheight = 512;
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int tex_xsize, tex_ysize;
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void
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GenerateRGBTables (unsigned char *Ytable, // Y-palette
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unsigned char *Utable, // U-palette
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unsigned char *Vtable, // V-palette
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float *bias, // bias (fourth vector to be added)
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float *Uscale, // scaling color for U
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float *Vscale) // scaling color for V
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{
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int i;
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const float mat[9] = { // the modified YUV->RGB matrix
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+1.130469478f, -0.058755723f, +1.596026304f,
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+1.130469478f, -0.450515935f, -0.812967512f,
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+1.130469478f, +1.958477882f, 0.0f
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};
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#define COMPRESS(a)(0.5f*(a)+128.0f) // counter-piece to EXPAND_NORMAL
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#define fCOMPRESS(a) (0.5f*(a)+0.5f);
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#define XCLAMP(a) ((a)<0.0f ? 0.0f : ((a)>255.0f ? 255.0f : (a))) // should not be necessary, but what do you know.
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bias[0] = fCOMPRESS (-0.842580964f);
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bias[1] = fCOMPRESS (+0.563287723f);
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bias[2] = fCOMPRESS (-1.0f);
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bias[3] = 0.0f;
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Uscale[0] = 8.0f / 255.0f;
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Uscale[1] = 60.0f / 255.0f;
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Uscale[2] = 250.0f / 255.0f;
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Uscale[3] = 0.0f;
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Vscale[0] = 204.0f / 255.0f;
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Vscale[1] = 105.0f / 255.0f;
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Vscale[2] = 0.5f;
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Vscale[3] = 0.0f;
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for (i = 0; i < 256; i++) {
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// Y-table holds unsigned values
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Ytable[3 * i] = (unsigned char) XCLAMP (mat[0] * (float) i); // R
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Ytable[3 * i + 1] = (unsigned char) XCLAMP (mat[3] * (float) i); // G
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Ytable[3 * i + 2] = (unsigned char) XCLAMP (mat[6] * (float) i); // B
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// U-table holds signed values
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Utable[3 * i] = (unsigned char) XCLAMP (COMPRESS (255.0f / 16.0f * mat[1] * (float) i)); // R
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Utable[3 * i + 1] = (unsigned char) XCLAMP (COMPRESS (255.0f / 120.0f * mat[4] * (float) i)); // G
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Utable[3 * i + 2] = (unsigned char) XCLAMP (COMPRESS (255.0f / 500.0f * mat[7] * (float) i)); // B
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// V-table holds signed values
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Vtable[3 * i] = (unsigned char) XCLAMP (COMPRESS (255.0f / 408.0f * mat[2] * (float) i)); // R
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Vtable[3 * i + 1] = (unsigned char) XCLAMP (COMPRESS (255.0f / 210.0f * mat[5] * (float) i)); // G
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Vtable[3 * i + 2] = (unsigned char) (128.0f - 14.0f); // G constant
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}
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#undef fCOMPRESS
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#undef COMPRESS
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#undef XCLAMP
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}
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// Sets the constants. Call once prior to rendering.
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void
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SetConsts (float *bias, float *Uscale, float *Vscale)
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{
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glEnable (GL_REGISTER_COMBINERS_NV);
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glColor3fv (bias);
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//printf("%f %f %f\n",bias[0],bias[1],bias[2]);
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glCombinerParameterfvNV (GL_CONSTANT_COLOR0_NV, Uscale);
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glCombinerParameterfvNV (GL_CONSTANT_COLOR1_NV, Vscale);
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}
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/*
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* SOFTWARE PATH
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*/
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inline void
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map_EXPAND_NORMAL (float *v)
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{
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v[0] = 2.0f * v[0] - 1.0f;
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v[1] = 2.0f * v[1] - 1.0f;
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v[2] = 2.0f * v[2] - 1.0f;
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}
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inline void
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map_UNSIGNED_INVERT (float *v)
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{
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v[0] = 1.0f - v[0];
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v[1] = 1.0f - v[1];
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v[2] = 1.0f - v[2];
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}
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inline void
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map_UNSIGNED_IDENTITY (float *v)
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{
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v[0] = (v[0] < 0.0f ? 0.0f : v[0]);
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v[1] = (v[1] < 0.0f ? 0.0f : v[1]);
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v[2] = (v[2] < 0.0f ? 0.0f : v[2]);
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}
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inline void
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map_SIGNED_IDENTITY (float *v)
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{
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}
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inline void
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omap_SCALE_BY_TWO (float *v)
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{
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v[0] *= 2.0f;
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v[1] *= 2.0f;
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v[2] *= 2.0f;
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}
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inline void
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omap_SCALE_BY_ONE_HALF (float *v)
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{
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v[0] *= 0.5f;
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v[1] *= 0.5f;
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v[2] *= 0.5f;
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}
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inline void
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omap_RANGE (float *v)
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{
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v[0] = (v[0] < -1.0f ? -1.0f : (v[0] > 1.0f ? 1.0f : v[0]));
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v[1] = (v[1] < -1.0f ? -1.0f : (v[1] > 1.0f ? 1.0f : v[1]));
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v[2] = (v[2] < -1.0f ? -1.0f : (v[2] > 1.0f ? 1.0f : v[2]));
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}
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inline void
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omap_CLAMP_01 (float *v)
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{
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v[0] = (v[0] < 0.0f ? 0.0f : (v[0] > 1.0f ? 1.0f : v[0]));
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v[1] = (v[1] < 0.0f ? 0.0f : (v[1] > 1.0f ? 1.0f : v[1]));
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v[2] = (v[2] < 0.0f ? 0.0f : (v[2] > 1.0f ? 1.0f : v[2]));
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}
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void
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PerformSWCombiner (unsigned char *Result,
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unsigned char *tex0,
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unsigned char *tex1,
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unsigned char *tex2, float *COLOR0, float *CONST0, float *CONST1)
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{
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float SPARE0[3];
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float SPARE1[3];
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float A[3], B[3], C[3], D[3];
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float TEX0[3], TEX1[3], TEX2[3];
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float ZERO[3] = { 0.0f, 0.0f, 0.0f };
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TEX0[0] = (float) tex0[0] / 255.0f;
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TEX0[1] = (float) tex0[1] / 255.0f;
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TEX0[2] = (float) tex0[2] / 255.0f;
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TEX1[0] = (float) tex1[0] / 255.0f;
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TEX1[1] = (float) tex1[1] / 255.0f;
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TEX1[2] = (float) tex1[2] / 255.0f;
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TEX2[0] = (float) tex2[0] / 255.0f;
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TEX2[1] = (float) tex2[1] / 255.0f;
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TEX2[2] = (float) tex2[2] / 255.0f;
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// Combiner Stage 0:
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memcpy (A, TEX0, 3 * sizeof (float));
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map_UNSIGNED_IDENTITY (A);
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memcpy (B, ZERO, 3 * sizeof (float));
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map_UNSIGNED_INVERT (B);
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memcpy (C, COLOR0, 3 * sizeof (float));
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map_EXPAND_NORMAL (C);
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memcpy (D, ZERO, 3 * sizeof (float));
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map_UNSIGNED_INVERT (D);
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SPARE0[0] = A[0] * B[0] + C[0] * D[0];
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SPARE0[1] = A[1] * B[1] + C[1] * D[1];
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SPARE0[2] = A[2] * B[2] + C[2] * D[2];
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omap_SCALE_BY_ONE_HALF (SPARE0);
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omap_RANGE (SPARE0);
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// Combiner Stage 1:
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memcpy (A, TEX1, 3 * sizeof (float));
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map_EXPAND_NORMAL (A);
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memcpy (B, CONST0, 3 * sizeof (float));
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map_UNSIGNED_IDENTITY (B);
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memcpy (C, TEX2, 3 * sizeof (float));
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map_EXPAND_NORMAL (C);
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memcpy (D, CONST1, 3 * sizeof (float));
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map_UNSIGNED_IDENTITY (D);
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SPARE1[0] = A[0] * B[0] + C[0] * D[0];
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SPARE1[1] = A[1] * B[1] + C[1] * D[1];
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SPARE1[2] = A[2] * B[2] + C[2] * D[2];
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omap_RANGE (SPARE1);
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// Combiner Stage 2:
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memcpy (A, SPARE0, 3 * sizeof (float));
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map_SIGNED_IDENTITY (A);
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memcpy (B, ZERO, 3 * sizeof (float));
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map_UNSIGNED_INVERT (B);
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memcpy (C, SPARE1, 3 * sizeof (float));
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map_SIGNED_IDENTITY (C);
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memcpy (D, ZERO, 3 * sizeof (float));
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map_UNSIGNED_INVERT (D);
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SPARE0[0] = A[0] * B[0] + C[0] * D[0];
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SPARE0[1] = A[1] * B[1] + C[1] * D[1];
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SPARE0[2] = A[2] * B[2] + C[2] * D[2];
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omap_SCALE_BY_TWO (SPARE0);
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omap_RANGE (SPARE0);
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// Final Combiner Stage:
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memcpy (A, ZERO, 3 * sizeof (float));
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map_UNSIGNED_INVERT (A);
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memcpy (B, SPARE0, 3 * sizeof (float));
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map_UNSIGNED_IDENTITY (B);
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memcpy (C, ZERO, 3 * sizeof (float));
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map_UNSIGNED_IDENTITY (C);
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memcpy (D, ZERO, 3 * sizeof (float));
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map_UNSIGNED_IDENTITY (D);
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SPARE0[0] = A[0] * B[0] + (1.0f - A[0]) * C[0] + D[0];
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SPARE0[1] = A[1] * B[1] + (1.0f - A[1]) * C[1] + D[1];
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SPARE0[2] = A[2] * B[2] + (1.0f - A[2]) * C[2] + D[2];
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omap_CLAMP_01 (SPARE0);
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Result[0] = (unsigned char) (SPARE0[0] * 255.0f);
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Result[1] = (unsigned char) (SPARE0[1] * 255.0f);
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Result[2] = (unsigned char) (SPARE0[2] * 255.0f);
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}
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// Sets up the register combiners. Call once prior to rendering
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void
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SetupCombiners (void)
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{
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glCombinerParameteriNV (GL_NUM_GENERAL_COMBINERS_NV, 3);
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// Combiner Stage 0: th. OK
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glCombinerInputNV (GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV, GL_TEXTURE0_ARB,
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GL_UNSIGNED_IDENTITY_NV, GL_RGB);
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glCombinerInputNV (GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV, GL_ZERO,
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GL_UNSIGNED_INVERT_NV, GL_RGB);
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glCombinerInputNV (GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_C_NV,
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GL_PRIMARY_COLOR_NV, GL_EXPAND_NORMAL_NV, GL_RGB);
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glCombinerInputNV (GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_D_NV, GL_ZERO,
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GL_UNSIGNED_INVERT_NV, GL_RGB);
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glCombinerOutputNV (GL_COMBINER0_NV, GL_RGB, GL_DISCARD_NV, GL_DISCARD_NV,
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GL_SPARE0_NV, GL_SCALE_BY_ONE_HALF_NV, GL_NONE, GL_FALSE, GL_FALSE,
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GL_FALSE);
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// Combiner Stage 1: th. OK
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glCombinerInputNV (GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_A_NV, GL_TEXTURE1_ARB,
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GL_EXPAND_NORMAL_NV, GL_RGB);
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glCombinerInputNV (GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_B_NV,
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GL_CONSTANT_COLOR0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
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glCombinerInputNV (GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_C_NV, GL_TEXTURE2_ARB,
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GL_EXPAND_NORMAL_NV, GL_RGB);
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glCombinerInputNV (GL_COMBINER1_NV, GL_RGB, GL_VARIABLE_D_NV,
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GL_CONSTANT_COLOR1_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
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glCombinerOutputNV (GL_COMBINER1_NV, GL_RGB, GL_DISCARD_NV, GL_DISCARD_NV,
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GL_SPARE1_NV, GL_NONE, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
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// Combiner Stage 2: th. OK
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glCombinerInputNV (GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_A_NV, GL_SPARE0_NV,
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GL_SIGNED_IDENTITY_NV, GL_RGB);
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glCombinerInputNV (GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_B_NV, GL_ZERO,
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GL_UNSIGNED_INVERT_NV, GL_RGB);
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glCombinerInputNV (GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_C_NV, GL_SPARE1_NV,
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GL_SIGNED_IDENTITY_NV, GL_RGB);
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glCombinerInputNV (GL_COMBINER2_NV, GL_RGB, GL_VARIABLE_D_NV, GL_ZERO,
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GL_UNSIGNED_INVERT_NV, GL_RGB);
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glCombinerOutputNV (GL_COMBINER2_NV, GL_RGB, GL_DISCARD_NV, GL_DISCARD_NV,
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GL_SPARE0_NV, GL_SCALE_BY_TWO_NV, GL_NONE, GL_FALSE, GL_FALSE, GL_FALSE);
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// Final Sage: th. OK
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glFinalCombinerInputNV (GL_VARIABLE_A_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV,
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GL_RGB);
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glFinalCombinerInputNV (GL_VARIABLE_B_NV, GL_SPARE0_NV,
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GL_UNSIGNED_IDENTITY_NV, GL_RGB);
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glFinalCombinerInputNV (GL_VARIABLE_C_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV,
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GL_RGB);
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glFinalCombinerInputNV (GL_VARIABLE_D_NV, GL_ZERO, GL_UNSIGNED_IDENTITY_NV,
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GL_RGB);
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glFinalCombinerInputNV (GL_VARIABLE_G_NV, GL_ZERO, GL_UNSIGNED_INVERT_NV,
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GL_ALPHA);
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}
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unsigned int
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PowerOfTwo (unsigned int i)
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{
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unsigned int bitsum = 0;
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unsigned int shifts = 0;
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unsigned int j = (unsigned int) i;
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// Check wether i is a power of two - may contain at most one set bit
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do {
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bitsum += j & 1;
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j = j >> 1;
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++shifts;
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} while (j > 0);
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if (bitsum == 1)
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return i;
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else
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return (1 << shifts);
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}
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// Initializes textures. Call once prior to rendering
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void
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InitYUVPlanes (GLuint * Yhandle, GLuint * Uhandle, GLuint * Vhandle, unsigned int Ywidth, unsigned int Yheight, unsigned int UVwidth, unsigned int UVheight, GLenum filter, // filter should be either GL_NEAREST or GL_LINEAR. Test this!
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unsigned char *Ypal, unsigned char *Upal, unsigned char *Vpal)
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{
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glGenTextures (1, Yhandle);
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glGenTextures (1, Uhandle);
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glGenTextures (1, Vhandle);
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glBindTexture (GL_TEXTURE_2D, (*Yhandle));
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#ifdef _WIN32
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glColorTableEXT (GL_TEXTURE_2D, GL_RGB8, 256, GL_RGB, GL_UNSIGNED_BYTE, Ypal);
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#else // Hopefully Linux
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glColorTable (GL_TEXTURE_2D, GL_RGB8, 256, GL_RGB, GL_UNSIGNED_BYTE, Ypal);
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#endif
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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tex_xsize = PowerOfTwo (Ywidth);
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tex_ysize = PowerOfTwo (Yheight);
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glTexImage2D (GL_TEXTURE_2D, 0, GL_COLOR_INDEX8_EXT, PowerOfTwo (Ywidth),
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PowerOfTwo (Yheight), 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, NULL);
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glBindTexture (GL_TEXTURE_2D, (*Uhandle));
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#ifdef _WIN32
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glColorTableEXT (GL_TEXTURE_2D, GL_RGB8, 256, GL_RGB, GL_UNSIGNED_BYTE, Upal);
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#else // Hopefully Linux
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glColorTable (GL_TEXTURE_2D, GL_RGB8, 256, GL_RGB, GL_UNSIGNED_BYTE, Upal);
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#endif
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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glTexImage2D (GL_TEXTURE_2D, 0, GL_COLOR_INDEX8_EXT, PowerOfTwo (UVwidth),
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PowerOfTwo (UVheight), 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, NULL);
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glBindTexture (GL_TEXTURE_2D, (*Vhandle));
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#ifdef _WIN32
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glColorTableEXT (GL_TEXTURE_2D, GL_RGB8, 256, GL_RGB, GL_UNSIGNED_BYTE, Vpal);
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#else // Hopefully Linux
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glColorTable (GL_TEXTURE_2D, GL_RGB8, 256, GL_RGB, GL_UNSIGNED_BYTE, Vpal);
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#endif
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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glTexImage2D (GL_TEXTURE_2D, 0, GL_COLOR_INDEX8_EXT, PowerOfTwo (UVwidth),
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PowerOfTwo (UVheight), 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, NULL);
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}
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void
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LoadYUVPlanes (GLuint Yhandle, GLuint Uhandle, GLuint Vhandle,
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unsigned int Ywidth, unsigned int Yheight,
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unsigned int UVwidth, unsigned int UVheight,
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unsigned char *Ydata, unsigned char *Udata, unsigned char *Vdata)
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{
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glActiveTextureARB (GL_TEXTURE0_ARB);
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glBindTexture (GL_TEXTURE_2D, Yhandle);
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glTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, Ywidth, Yheight, GL_COLOR_INDEX,
|
|
GL_UNSIGNED_BYTE, Ydata);
|
|
glEnable (GL_TEXTURE_2D);
|
|
|
|
glActiveTextureARB (GL_TEXTURE1_ARB);
|
|
glBindTexture (GL_TEXTURE_2D, Uhandle);
|
|
glTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, UVwidth, UVheight, GL_COLOR_INDEX,
|
|
GL_UNSIGNED_BYTE, Udata);
|
|
glEnable (GL_TEXTURE_2D);
|
|
|
|
glActiveTextureARB (GL_TEXTURE2_ARB);
|
|
glBindTexture (GL_TEXTURE_2D, Vhandle);
|
|
glTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, UVwidth, UVheight, GL_COLOR_INDEX,
|
|
GL_UNSIGNED_BYTE, Vdata);
|
|
glEnable (GL_TEXTURE_2D);
|
|
}
|
|
|
|
|
|
void
|
|
Initialize_Backend (unsigned int Ywidth, unsigned int Yheight,
|
|
unsigned int UVwidth, unsigned int UVheight, GLenum filter)
|
|
{
|
|
printf ("Reinitializing register combiner backend with res %d x %d!\n",
|
|
Ywidth, Yheight);
|
|
//if (!GL_ARB_multitexture_Init()) exit(0);
|
|
//if (!GL_EXT_paletted_texture_Init()) exit(0);
|
|
//if (!GL_NV_register_combiners_Init()) exit(0);
|
|
unsigned char Ypal[768];
|
|
unsigned char Upal[768];
|
|
unsigned char Vpal[768];
|
|
float bias[4];
|
|
float Uscale[4];
|
|
float Vscale[4];
|
|
|
|
GenerateRGBTables (Ypal, Upal, Vpal, bias, Uscale, Vscale);
|
|
InitYUVPlanes (&Yhandle, &Uhandle, &Vhandle, Ywidth, Yheight, UVwidth,
|
|
UVheight, filter, Ypal, Upal, Vpal);
|
|
SetupCombiners ();
|
|
SetConsts (bias, Uscale, Vscale);
|
|
}
|
|
|
|
|
|
void
|
|
initialize (GLenum filter)
|
|
{
|
|
glShadeModel (GL_SMOOTH);
|
|
glHint (GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
|
|
glClearColor (0.0f, 0.0f, 0.2f, 1.0f);
|
|
Initialize_Backend (Ywidth, Yheight, UVwidth, UVheight, filter);
|
|
}
|