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Move scan order selection to a function.

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This commit is contained in:
Ari Koivula 2014-05-12 08:45:54 +03:00
parent 623d9001a8
commit 3c3c9a26c6
2 changed files with 24 additions and 25 deletions
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43
src/encoder.c
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@ -2871,6 +2871,24 @@ static void reconstruct_chroma(const encoder_state * const encoder_state, cu_inf
}
}
coeff_scan_order_t get_scan_order(int intra_mode, int depth)
{
coeff_scan_order_t scan_idx = SCAN_DIAG;
// Scan mode is diagonal, except for 4x4+8x8 luma and 4x4 chroma, where:
// - angular 6-14 = vertical
// - angular 22-30 = horizontal
if (depth >= 3) {
if (intra_mode >= 6 && intra_mode <= 14) {
scan_idx = SCAN_VER;
} else if (intra_mode >= 22 && intra_mode <= 30) {
scan_idx = SCAN_HOR;
}
}
return scan_idx;
}
/**
* This function calculates the residual coefficients for a region of the LCU
* (defined by x, y and depth) and updates the reconstruction with the
@ -2988,31 +3006,12 @@ void encode_transform_tree(encoder_state * const encoder_state, int32_t x, int32
// Pick coeff scan mode according to intra prediction mode.
if (cur_cu->type == CU_INTRA) {
int pu_index = PU_INDEX(x_pu, y_pu);
int luma_mode = cur_cu->intra[pu_index].mode;
int chroma_mode = cur_cu->intra[0].mode_chroma;
if (chroma_mode == 36) {
chroma_mode = luma_mode;
}
scan_idx_luma = SCAN_DIAG;
scan_idx_chroma = SCAN_DIAG;
// Scan mode is diagonal, except for 4x4+8x8 luma and 4x4 chroma, where:
// - angular 6-14 = vertical
// - angular 22-30 = horizontal
if (width <= 8) {
if (luma_mode >= 6 && luma_mode <= 14) {
scan_idx_luma = SCAN_VER;
} else if (luma_mode >= 22 && luma_mode <= 30) {
scan_idx_luma = SCAN_HOR;
}
if (chroma_mode >= 6 && chroma_mode <= 14) {
scan_idx_chroma = SCAN_VER;
} else if (chroma_mode >= 22 && chroma_mode <= 30) {
scan_idx_chroma = SCAN_HOR;
}
chroma_mode = cur_cu->intra[PU_INDEX(x_pu, y_pu)].mode;
}
scan_idx_luma = get_scan_order(cur_cu->intra[PU_INDEX(x_pu, y_pu)].mode, depth);
scan_idx_chroma = get_scan_order(chroma_mode, depth);
}
// Copy Luma and Chroma to the pred-block

4
src/tables.h
View file

@ -84,12 +84,12 @@ static const uint32_t * const g_sig_last_scan_cg[4][3] = {
};
enum COEFF_SCAN_TYPE
typedef enum
{
SCAN_DIAG = 0, // up-right diagonal scan
SCAN_HOR, // horizontal first scan
SCAN_VER // vertical first scan
};
} coeff_scan_order_t;
/**