diff --git a/vp9/common/vp9_idct.c b/vp9/common/vp9_idct.c index dea923724fed503e9fda8da294aaa3d32edbef9c..5598eb27877436f63ccb333a30d75a0ed0df6f83 100644 --- a/vp9/common/vp9_idct.c +++ b/vp9/common/vp9_idct.c @@ -1253,7 +1253,20 @@ void vp9_short_idct32x32_add_c(int16_t *input, uint8_t *dest, int dest_stride) { // Rows for (i = 0; i < 32; ++i) { - idct32_1d(input, outptr); + int16_t zero_coeff[16]; + for (j = 0; j < 16; ++j) + zero_coeff[j] = input[2 * j] | input[2 * j + 1]; + for (j = 0; j < 8; ++j) + zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1]; + for (j = 0; j < 4; ++j) + zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1]; + for (j = 0; j < 2; ++j) + zero_coeff[j] = zero_coeff[2 * j] | zero_coeff[2 * j + 1]; + + if (zero_coeff[0] | zero_coeff[1]) + idct32_1d(input, outptr); + else + vpx_memset(outptr, 0, sizeof(int16_t) * 32); input += 32; outptr += 32; }