yuv2mono_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 PixelFormat target) { const int16_t *buf0 = buf[0], *buf1 = buf[1]; const uint8_t * const d128 = dither_8x8_220[y & 7]; int yalpha1 = 4095 - yalpha; int i; for (i = 0; i < dstW; i += 8) { int Y, acc = 0; Y = (buf0[i + 0] * yalpha1 + buf1[i + 0] * yalpha) >> 19; accumulate_bit(acc, Y + d128[0]); Y = (buf0[i + 1] * yalpha1 + buf1[i + 1] * yalpha) >> 19; accumulate_bit(acc, Y + d128[1]); Y = (buf0[i + 2] * yalpha1 + buf1[i + 2] * yalpha) >> 19; accumulate_bit(acc, Y + d128[2]); Y = (buf0[i + 3] * yalpha1 + buf1[i + 3] * yalpha) >> 19; accumulate_bit(acc, Y + d128[3]); Y = (buf0[i + 4] * yalpha1 + buf1[i + 4] * yalpha) >> 19; accumulate_bit(acc, Y + d128[4]); Y = (buf0[i + 5] * yalpha1 + buf1[i + 5] * yalpha) >> 19; accumulate_bit(acc, Y + d128[5]); Y = (buf0[i + 6] * yalpha1 + buf1[i + 6] * yalpha) >> 19; accumulate_bit(acc, Y + d128[6]); Y = (buf0[i + 7] * yalpha1 + buf1[i + 7] * yalpha) >> 19; accumulate_bit(acc, Y + d128[7]); output_pixel(*dest++, acc); } }