/*  * Simple xawtv deinterlacing plugin - linear blend *  * CAVEATS: Still some interlacing effects in high motion perhaps * Some ghosting in instant transitions, slightly noticeable *  * BENEFITS: NO DROP IN FRAMERATE =] * Looks absolutely beautiful * Doesn't lower framerate * Oh and did I mention it doesn't lower framerate? * Plus, its MMX'itized now, so it really doesn't lower framerate. * * AUTHORS: * Conrad Kreyling <conrad@conrad.nerdland.org> * Patrick Barrett <yebyen@nerdland.org> * * This is licenced under the GNU GPL until someone tells me I'm stealing code * and can't do that ;) www.gnu.org for any version of the license. * * Based on xawtv-3.72/libng/plugins/flt-nop.c (also GPL) * Linear blend deinterlacing algorithm adapted from mplayer's libpostproc */#include "config.h"#include <stdio.h>#include <stdlib.h>#include <pthread.h>#include "grab-ng.h"#define PAVGB(a,b)  "pavgb " #a ", " #b " \n\t"#ifdef MMX#define emms()                  __asm__ __volatile__ ("emms")#else#define emms()#endifstatic inline void linearBlend(unsigned char *src, int stride){#ifdef MMX  asm volatile(       "leal (%0, %1), %%eax                           \n\t"       "leal (%%eax, %1, 4), %%ebx                     \n\t"       "movq (%0), %%mm0                               \n\t" // L0       "movq (%%eax, %1), %%mm1                        \n\t" // L2       PAVGB(%%mm1, %%mm0)                                   // L0+L2       "movq (%%eax), %%mm2                            \n\t" // L1       PAVGB(%%mm2, %%mm0)       "movq %%mm0, (%0)                               \n\t"       "movq (%%eax, %1, 2), %%mm0                     \n\t" // L3       PAVGB(%%mm0, %%mm2)                                   // L1+L3       PAVGB(%%mm1, %%mm2)                                   // 2L2 + L1 + L3       "movq %%mm2, (%%eax)                            \n\t"       "movq (%0, %1, 4), %%mm2                        \n\t" // L4       PAVGB(%%mm2, %%mm1)                                   // L2+L4       PAVGB(%%mm0, %%mm1)                                   // 2L3 + L2 + L4       "movq %%mm1, (%%eax, %1)                        \n\t"       "movq (%%ebx), %%mm1                            \n\t" // L5       PAVGB(%%mm1, %%mm0)                                   // L3+L5       PAVGB(%%mm2, %%mm0)                                   // 2L4 + L3 + L5       "movq %%mm0, (%%eax, %1, 2)                     \n\t"       "movq (%%ebx, %1), %%mm0                        \n\t" // L6       PAVGB(%%mm0, %%mm2)                                   // L4+L6       PAVGB(%%mm1, %%mm2)                                   // 2L5 + L4 + L6       "movq %%mm2, (%0, %1, 4)                        \n\t"       "movq (%%ebx, %1, 2), %%mm2                     \n\t" // L7       PAVGB(%%mm2, %%mm1)                                   // L5+L7       PAVGB(%%mm0, %%mm1)                                   // 2L6 + L5 + L7       "movq %%mm1, (%%ebx)                            \n\t"       "movq (%0, %1, 8), %%mm1                        \n\t" // L8       PAVGB(%%mm1, %%mm0)                                   // L6+L8       PAVGB(%%mm2, %%mm0)                                   // 2L7 + L6 + L8       "movq %%mm0, (%%ebx, %1)                        \n\t"       "movq (%%ebx, %1, 4), %%mm0                     \n\t" // L9       PAVGB(%%mm0, %%mm2)                                   // L7+L9       PAVGB(%%mm1, %%mm2)                                   // 2L8 + L7 + L9       "movq %%mm2, (%%ebx, %1, 2)                     \n\t"       : : "r" (src), "r" (stride)       : "%eax", "%ebx"  );  emms();#else  int x;  for (x=0; x<8; x++)  {     src[0       ] = (src[0       ] + 2*src[stride  ] + src[stride*2])>>2;     src[stride  ] = (src[stride  ] + 2*src[stride*2] + src[stride*3])>>2;     src[stride*2] = (src[stride*2] + 2*src[stride*3] + src[stride*4])>>2;     src[stride*3] = (src[stride*3] + 2*src[stride*4] + src[stride*5])>>2;     src[stride*4] = (src[stride*4] + 2*src[stride*5] + src[stride*6])>>2;     src[stride*5] = (src[stride*5] + 2*src[stride*6] + src[stride*7])>>2;     src[stride*6] = (src[stride*6] + 2*src[stride*7] + src[stride*8])>>2;     src[stride*7] = (src[stride*7] + 2*src[stride*8] + src[stride*9])>>2;     src++;  }#endif}static void inlinedeinterlace (struct ng_video_buf *frame){  unsigned int x, y, bytes = frame->fmt.bytesperline;  unsigned char *src;  for (y = 1; y < frame->fmt.height - 8; y+=8)  {        for (x = 0; x < bytes; x+=8)        {            src = frame->data + x + y * bytes;            linearBlend(src, bytes);        }   }  emms();}static void *init (struct ng_video_fmt *out){  /* no status info needed */  static int dummy;   return &dummy;} static struct ng_video_buf *frame (void *handle, struct ng_video_buf *frame){         deinterlace (frame);  return frame;}                 static voidfini (void *handle){  /* nothing to clean up */}/* ------------------------------------------------------------------- */static struct ng_filter filter = {  name:"linear blend",  fmts:    (1 << VIDEO_GRAY) |    (1 << VIDEO_RGB15_NATIVE) |    (1 << VIDEO_RGB16_NATIVE) |    (1 << VIDEO_BGR24) |    (1 << VIDEO_RGB24) |    (1 << VIDEO_BGR32) |    (1 << VIDEO_RGB32) |    (1 << VIDEO_YUYV)  |    (1 << VIDEO_UYVY),  init:init,  frame:frame,  fini:fini,};extern void ng_plugin_init (void);voidng_plugin_init (void) {  ng_filter_register (NG_PLUGIN_MAGIC,__FILE__,&filter);}