static inline int RENAME(yuv420_rgb32)(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t* dst[], int dstStride[]){ int y, h_size; if(c->srcFormat == PIX_FMT_YUV422P){ srcStride[1] *= 2; srcStride[2] *= 2; } h_size= (c->dstW+7)&~7; if(h_size*4 > dstStride[0]) h_size-=8; __asm__ __volatile__ ("pxor %mm4, %mm4;" /* zero mm4 */ ); for (y= 0; y<srcSliceH; y++ ) { uint8_t *_image = dst[0] + (y+srcSliceY)*dstStride[0]; uint8_t *_py = src[0] + y*srcStride[0]; uint8_t *_pu = src[1] + (y>>1)*srcStride[1]; uint8_t *_pv = src[2] + (y>>1)*srcStride[2]; long index= -h_size/2; /* this mmx assembly code deals with SINGLE scan line at a time, it convert 8 pixels in each iteration */ __asm__ __volatile__ ( /* load data for start of next scan line */ "movd (%2, %0), %%mm0;" /* Load 4 Cb 00 00 00 00 u3 u2 u1 u0 */ "movd (%3, %0), %%mm1;" /* Load 4 Cr 00 00 00 00 v3 v2 v1 v0 */ "movq (%5, %0, 2), %%mm6;" /* Load 8 Y Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 */ // ".balign 16 \n\t" "1: \n\t" YUV2RGB /* convert RGB plane to RGB packed format, mm0 -> B, mm1 -> R, mm2 -> G, mm3 -> 0, mm4 -> GB, mm5 -> AR pixel 4-7, mm6 -> GB, mm7 -> AR pixel 0-3 */ "pxor %%mm3, %%mm3;" /* zero mm3 */ "movq %%mm0, %%mm6;" /* B7 B6 B5 B4 B3 B2 B1 B0 */ "movq %%mm1, %%mm7;" /* R7 R6 R5 R4 R3 R2 R1 R0 */ "movq %%mm0, %%mm4;" /* B7 B6 B5 B4 B3 B2 B1 B0 */ "movq %%mm1, %%mm5;" /* R7 R6 R5 R4 R3 R2 R1 R0 */ "punpcklbw %%mm2, %%mm6;" /* G3 B3 G2 B2 G1 B1 G0 B0 */ "punpcklbw %%mm3, %%mm7;" /* 00 R3 00 R2 00 R1 00 R0 */ "punpcklwd %%mm7, %%mm6;" /* 00 R1 B1 G1 00 R0 B0 G0 */ MOVNTQ " %%mm6, (%1);" /* Store ARGB1 ARGB0 */ "movq %%mm0, %%mm6;" /* B7 B6 B5 B4 B3 B2 B1 B0 */ "punpcklbw %%mm2, %%mm6;" /* G3 B3 G2 B2 G1 B1 G0 B0 */ "punpckhwd %%mm7, %%mm6;" /* 00 R3 G3 B3 00 R2 B3 G2 */ MOVNTQ " %%mm6, 8 (%1);" /* Store ARGB3 ARGB2 */ "punpckhbw %%mm2, %%mm4;" /* G7 B7 G6 B6 G5 B5 G4 B4 */ "punpckhbw %%mm3, %%mm5;" /* 00 R7 00 R6 00 R5 00 R4 */ "punpcklwd %%mm5, %%mm4;" /* 00 R5 B5 G5 00 R4 B4 G4 */ MOVNTQ " %%mm4, 16 (%1);" /* Store ARGB5 ARGB4 */ "movq %%mm0, %%mm4;" /* B7 B6 B5 B4 B3 B2 B1 B0 */ "punpckhbw %%mm2, %%mm4;" /* G7 B7 G6 B6 G5 B5 G4 B4 */ "punpckhwd %%mm5, %%mm4;" /* 00 R7 G7 B7 00 R6 B6 G6 */ MOVNTQ " %%mm4, 24 (%1);" /* Store ARGB7 ARGB6 */ "movd 4 (%2, %0), %%mm0;" /* Load 4 Cb 00 00 00 00 u3 u2 u1 u0 */ "movd 4 (%3, %0), %%mm1;" /* Load 4 Cr 00 00 00 00 v3 v2 v1 v0 */ "pxor %%mm4, %%mm4;" /* zero mm4 */ "movq 8 (%5, %0, 2), %%mm6;" /* Load 8 Y Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 */ "add $32, %1 \n\t" "add $4, %0 \n\t" " js 1b \n\t" : "+r" (index), "+r" (_image) : "r" (_pu - index), "r" (_pv - index), "r"(&c->redDither), "r" (_py - 2*index) ); } __asm__ __volatile__ (EMMS); return srcSliceH; }