Commit bd9db2f5 authored by Angie Chiang's avatar Angie Chiang

Add idct8

Change-Id: I8092a6f229b196c5c8b7dcd2dff8aaf68253e422
parent 7d2b7b69
......@@ -81,3 +81,88 @@ void vp10_idct4_new(const int32_t *input, int32_t *output,
bf1[3] = bf0[0] - bf0[3];
range_check(stage, input, bf1, size, stage_range[stage]);
}
void vp10_idct8_new(const int32_t *input, int32_t *output,
const int8_t *cos_bit, const int8_t *stage_range) {
const int32_t size = 8;
const int32_t *cospi;
int32_t stage = 0;
int32_t *bf0, *bf1;
int32_t step[8];
// stage 0;
range_check(stage, input, input, size, stage_range[stage]);
// stage 1;
stage++;
bf1 = output;
bf1[0] = input[0];
bf1[1] = input[4];
bf1[2] = input[2];
bf1[3] = input[6];
bf1[4] = input[1];
bf1[5] = input[5];
bf1[6] = input[3];
bf1[7] = input[7];
range_check(stage, input, bf1, size, stage_range[stage]);
// stage 2
stage++;
cospi = cospi_arr[cos_bit[stage] - cos_bit_min];
bf0 = output;
bf1 = step;
bf1[0] = bf0[0];
bf1[1] = bf0[1];
bf1[2] = bf0[2];
bf1[3] = bf0[3];
bf1[4] = half_btf(cospi[56], bf0[4], -cospi[8], bf0[7], cos_bit[stage]);
bf1[5] = half_btf(cospi[24], bf0[5], -cospi[40], bf0[6], cos_bit[stage]);
bf1[6] = half_btf(cospi[40], bf0[5], cospi[24], bf0[6], cos_bit[stage]);
bf1[7] = half_btf(cospi[8], bf0[4], cospi[56], bf0[7], cos_bit[stage]);
range_check(stage, input, bf1, size, stage_range[stage]);
// stage 3
stage++;
cospi = cospi_arr[cos_bit[stage] - cos_bit_min];
bf0 = step;
bf1 = output;
bf1[0] = half_btf(cospi[32], bf0[0], cospi[32], bf0[1], cos_bit[stage]);
bf1[1] = half_btf(cospi[32], bf0[0], -cospi[32], bf0[1], cos_bit[stage]);
bf1[2] = half_btf(cospi[48], bf0[2], -cospi[16], bf0[3], cos_bit[stage]);
bf1[3] = half_btf(cospi[16], bf0[2], cospi[48], bf0[3], cos_bit[stage]);
bf1[4] = bf0[4] + bf0[5];
bf1[5] = bf0[4] - bf0[5];
bf1[6] = -bf0[6] + bf0[7];
bf1[7] = bf0[6] + bf0[7];
range_check(stage, input, bf1, size, stage_range[stage]);
// stage 4
stage++;
cospi = cospi_arr[cos_bit[stage] - cos_bit_min];
bf0 = output;
bf1 = step;
bf1[0] = bf0[0] + bf0[3];
bf1[1] = bf0[1] + bf0[2];
bf1[2] = bf0[1] - bf0[2];
bf1[3] = bf0[0] - bf0[3];
bf1[4] = bf0[4];
bf1[5] = half_btf(-cospi[32], bf0[5], cospi[32], bf0[6], cos_bit[stage]);
bf1[6] = half_btf(cospi[32], bf0[5], cospi[32], bf0[6], cos_bit[stage]);
bf1[7] = bf0[7];
range_check(stage, input, bf1, size, stage_range[stage]);
// stage 5
stage++;
bf0 = step;
bf1 = output;
bf1[0] = bf0[0] + bf0[7];
bf1[1] = bf0[1] + bf0[6];
bf1[2] = bf0[2] + bf0[5];
bf1[3] = bf0[3] + bf0[4];
bf1[4] = bf0[3] - bf0[4];
bf1[5] = bf0[2] - bf0[5];
bf1[6] = bf0[1] - bf0[6];
bf1[7] = bf0[0] - bf0[7];
range_check(stage, input, bf1, size, stage_range[stage]);
}
......@@ -19,6 +19,8 @@ extern "C" {
void vp10_idct4_new(const int32_t *input, int32_t *output,
const int8_t *cos_bit, const int8_t *stage_range);
void vp10_idct8_new(const int32_t *input, int32_t *output,
const int8_t *cos_bit, const int8_t *stage_range);
#ifdef __cplusplus
}
......
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