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hevc: Add DC IDCT

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Integrated to Libav by Josh de Kock <josh@itanimul.li>.

Signed-off-by: Alexandra Hájková <alexandra@khirnov.net>
This commit is contained in:
Mickaël Raulet 2016-07-04 15:37:52 +02:00 committed by Luca Barbato
parent 4f247de3b7
commit a92fd8a062
4 changed files with 31 additions and 2 deletions
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9
libavcodec/hevc.c
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@ -1214,8 +1214,13 @@ static void hls_residual_coding(HEVCContext *s, int x0, int y0,
else if (lc->cu.pred_mode == MODE_INTRA && c_idx == 0 &&
log2_trafo_size == 2)
s->hevcdsp.transform_4x4_luma(coeffs);
else
s->hevcdsp.idct[log2_trafo_size - 2](coeffs);
else {
int max_xy = FFMAX(last_significant_coeff_x, last_significant_coeff_y);
if (max_xy == 0)
s->hevcdsp.idct_dc[log2_trafo_size - 2](coeffs);
else
s->hevcdsp.idct[log2_trafo_size - 2](coeffs);
}
}
s->hevcdsp.add_residual[log2_trafo_size - 2](dst, coeffs, stride);
}

4
libavcodec/hevcdsp.c
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@ -175,6 +175,10 @@ void ff_hevc_dsp_init(HEVCDSPContext *hevcdsp, int bit_depth)
hevcdsp->idct[2] = FUNC(idct_16x16, depth); \
hevcdsp->idct[3] = FUNC(idct_32x32, depth); \
\
hevcdsp->idct_dc[0] = FUNC(idct_4x4_dc, depth); \
hevcdsp->idct_dc[1] = FUNC(idct_8x8_dc, depth); \
hevcdsp->idct_dc[2] = FUNC(idct_16x16_dc, depth); \
hevcdsp->idct_dc[3] = FUNC(idct_32x32_dc, depth); \
hevcdsp->sao_band_filter[0] = FUNC(sao_band_filter_0, depth); \
hevcdsp->sao_band_filter[1] = FUNC(sao_band_filter_1, depth); \
hevcdsp->sao_band_filter[2] = FUNC(sao_band_filter_2, depth); \

1
libavcodec/hevcdsp.h
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@ -47,6 +47,7 @@ typedef struct HEVCDSPContext {
void (*dequant)(int16_t *coeffs);
void (*transform_4x4_luma)(int16_t *coeffs);
void (*idct[4])(int16_t *coeffs);
void (*idct_dc[4])(int16_t *coeffs);
void (*sao_band_filter[4])(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
struct SAOParams *sao, int *borders,

19
libavcodec/hevcdsp_template.c
View File

@ -223,10 +223,29 @@ static void FUNC(idct_ ## H ## x ## H )(int16_t *coeffs) \
} \
}
#define IDCT_DC(H) \
static void FUNC(idct_ ## H ## x ## H ## _dc)(int16_t *coeffs) \
{ \
int i, j; \
int shift = 14 - BIT_DEPTH; \
int add = 1 << (shift - 1); \
int coeff = (((coeffs[0] + 1) >> 1) + add) >> shift; \
\
for (j = 0; j < H; j++) { \
for (i = 0; i < H; i++) { \
coeffs[i + j * H] = coeff; \
} \
} \
}
IDCT( 4)
IDCT( 8)
IDCT(16)
IDCT(32)
IDCT_DC( 4)
IDCT_DC( 8)
IDCT_DC(16)
IDCT_DC(32)
#undef TR_4
#undef TR_8
#undef TR_16