yuv2rgb_full_2_c_template(SwsContext *c, const int16_t *buf[2], const int16_t *ubuf[2], const int16_t *vbuf[2], const int16_t *abuf[2], uint8_t *dest, int dstW, int yalpha, int uvalpha, int y, enum AVPixelFormat target, int hasAlpha) { const int16_t *buf0 = buf[0], *buf1 = buf[1], *ubuf0 = ubuf[0], *ubuf1 = ubuf[1], *vbuf0 = vbuf[0], *vbuf1 = vbuf[1], *abuf0 = hasAlpha ? abuf[0] : NULL, *abuf1 = hasAlpha ? abuf[1] : NULL; int yalpha1 = 4096 - yalpha; int uvalpha1 = 4096 - uvalpha; int i; int step = (target == AV_PIX_FMT_RGB24 || target == AV_PIX_FMT_BGR24) ? 3 : 4; int err[4] = {0}; if( target == AV_PIX_FMT_BGR4_BYTE || target == AV_PIX_FMT_RGB4_BYTE || target == AV_PIX_FMT_BGR8 || target == AV_PIX_FMT_RGB8) step = 1; for (i = 0; i < dstW; i++) { int Y = ( buf0[i] * yalpha1 + buf1[i] * yalpha ) >> 10; //FIXME rounding int U = (ubuf0[i] * uvalpha1 + ubuf1[i] * uvalpha-(128 << 19)) >> 10; int V = (vbuf0[i] * uvalpha1 + vbuf1[i] * uvalpha-(128 << 19)) >> 10; int A; if (hasAlpha) { A = (abuf0[i] * yalpha1 + abuf1[i] * yalpha + (1<<18)) >> 19; if (A & 0x100) A = av_clip_uint8(A); } yuv2rgb_write_full(c, dest, i, Y, A, U, V, y, target, hasAlpha, err); dest += step; } c->dither_error[0][i] = err[0]; c->dither_error[1][i] = err[1]; c->dither_error[2][i] = err[2]; }