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rv34: DC-only inverse transform
When decoding coefficients, detect whether the block is DC-only, and take advantage of this knowledge to perform DC-only inverse transform. This is achieved by: - first, changing the 108x4 element modulo_three_table into a 108 element table (kind of base4), and accessing each value using mask and shifts. - then, checking low bits for 0 (as they represent the presence of higher frequency coefficients) Also provide x86 SIMD code for the DC-only inverse transform. Signed-off-by: Kostya Shishkov <kostya.shishkov@gmail.com>
This commit is contained in:
Christophe GISQUET
Kostya Shishkov
parent
b2ce3b998b
commit
3faa303a47
@ -204,7 +204,7 @@ static int rv34_decode_cbp(GetBitContext *gb, RV34VLC *vlc, int table)
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}
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for(i = 0; i < 4; i++){
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t = modulo_three_table[code][i];
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t = (modulo_three_table[code] >> (6 - 2*i)) & 3;
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if(t == 1)
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cbp |= cbp_masks[get_bits1(gb)] << i;
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if(t == 2)
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@ -238,41 +238,42 @@ static inline void decode_coeff(DCTELEM *dst, int coef, int esc, GetBitContext *
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*/
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static inline void decode_subblock(DCTELEM *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc, int q)
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{
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int coeffs[4];
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int flags = modulo_three_table[code];
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coeffs[0] = modulo_three_table[code][0];
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coeffs[1] = modulo_three_table[code][1];
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coeffs[2] = modulo_three_table[code][2];
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coeffs[3] = modulo_three_table[code][3];
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decode_coeff(dst , coeffs[0], 3, gb, vlc, q);
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decode_coeff( dst+0, (flags >> 6) , 3, gb, vlc, q);
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if(is_block2){
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decode_coeff(dst+8, coeffs[1], 2, gb, vlc, q);
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decode_coeff(dst+1, coeffs[2], 2, gb, vlc, q);
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decode_coeff(dst+8, (flags >> 4) & 3, 2, gb, vlc, q);
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decode_coeff(dst+1, (flags >> 2) & 3, 2, gb, vlc, q);
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}else{
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decode_coeff(dst+1, coeffs[1], 2, gb, vlc, q);
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decode_coeff(dst+8, coeffs[2], 2, gb, vlc, q);
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decode_coeff(dst+1, (flags >> 4) & 3, 2, gb, vlc, q);
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decode_coeff(dst+8, (flags >> 2) & 3, 2, gb, vlc, q);
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}
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decode_coeff(dst+9, coeffs[3], 2, gb, vlc, q);
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decode_coeff( dst+9, (flags >> 0) & 3, 2, gb, vlc, q);
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}
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/**
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* Decode a single coefficient.
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*/
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static inline void decode_subblock1(DCTELEM *dst, int code, GetBitContext *gb, VLC *vlc, int q)
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{
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int coeff = modulo_three_table[code] >> 6;
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decode_coeff(dst, coeff, 3, gb, vlc, q);
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}
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static inline void decode_subblock3(DCTELEM *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc,
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int q_dc, int q_ac1, int q_ac2)
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{
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int coeffs[4];
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int flags = modulo_three_table[code];
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coeffs[0] = modulo_three_table[code][0];
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coeffs[1] = modulo_three_table[code][1];
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coeffs[2] = modulo_three_table[code][2];
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coeffs[3] = modulo_three_table[code][3];
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decode_coeff(dst , coeffs[0], 3, gb, vlc, q_dc);
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decode_coeff( dst+0, (flags >> 6) , 3, gb, vlc, q_dc);
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if(is_block2){
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decode_coeff(dst+8, coeffs[1], 2, gb, vlc, q_ac1);
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decode_coeff(dst+1, coeffs[2], 2, gb, vlc, q_ac1);
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decode_coeff(dst+8, (flags >> 4) & 3, 2, gb, vlc, q_ac1);
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decode_coeff(dst+1, (flags >> 2) & 3, 2, gb, vlc, q_ac1);
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}else{
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decode_coeff(dst+1, coeffs[1], 2, gb, vlc, q_ac1);
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decode_coeff(dst+8, coeffs[2], 2, gb, vlc, q_ac1);
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decode_coeff(dst+1, (flags >> 4) & 3, 2, gb, vlc, q_ac1);
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decode_coeff(dst+8, (flags >> 2) & 3, 2, gb, vlc, q_ac1);
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}
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decode_coeff(dst+9, coeffs[3], 2, gb, vlc, q_ac2);
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decode_coeff( dst+9, (flags >> 0) & 3, 2, gb, vlc, q_ac2);
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}
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/**
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@ -286,16 +287,24 @@ static inline void decode_subblock3(DCTELEM *dst, int code, const int is_block2,
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* o--o
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*/
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static inline void rv34_decode_block(DCTELEM *dst, GetBitContext *gb, RV34VLC *rvlc, int fc, int sc, int q_dc, int q_ac1, int q_ac2)
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static inline int rv34_decode_block(DCTELEM *dst, GetBitContext *gb, RV34VLC *rvlc, int fc, int sc, int q_dc, int q_ac1, int q_ac2)
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{
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int code, pattern;
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int code, pattern, has_ac = 1;
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code = get_vlc2(gb, rvlc->first_pattern[fc].table, 9, 2);
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pattern = code & 0x7;
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code >>= 3;
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decode_subblock3(dst, code, 0, gb, &rvlc->coefficient, q_dc, q_ac1, q_ac2);
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if (modulo_three_table[code] & 0x3F) {
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decode_subblock3(dst, code, 0, gb, &rvlc->coefficient, q_dc, q_ac1, q_ac2);
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} else {
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decode_subblock1(dst, code, gb, &rvlc->coefficient, q_dc);
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if (!pattern)
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return 0;
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has_ac = 0;
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}
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if(pattern & 4){
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code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
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@ -309,7 +318,7 @@ static inline void rv34_decode_block(DCTELEM *dst, GetBitContext *gb, RV34VLC *r
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code = get_vlc2(gb, rvlc->third_pattern[sc].table, 9, 2);
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decode_subblock(dst + 8*2+2, code, 0, gb, &rvlc->coefficient, q_ac2);
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}
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return has_ac || pattern;
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}
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/**
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@ -1118,7 +1127,7 @@ static int rv34_decode_macroblock(RV34DecContext *r, int8_t *intra_types)
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MpegEncContext *s = &r->s;
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GetBitContext *gb = &s->gb;
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int cbp, cbp2;
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int q_dc, q_ac;
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int q_dc, q_ac, has_ac;
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int i, blknum, blkoff;
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LOCAL_ALIGNED_16(DCTELEM, block16, [64]);
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int luma_dc_quant;
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@ -1157,33 +1166,45 @@ static int rv34_decode_macroblock(RV34DecContext *r, int8_t *intra_types)
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if(r->is16){
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q_dc = rv34_qscale_tab[luma_dc_quant];
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q_ac = rv34_qscale_tab[s->qscale];
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memset(block16, 0, 64 * sizeof(*block16));
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rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac);
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r->rdsp.rv34_inv_transform_tab[1](block16);
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s->dsp.clear_block(block16);
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if (rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac))
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r->rdsp.rv34_inv_transform_tab[1](block16);
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else
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r->rdsp.rv34_inv_transform_dc_tab[1](block16);
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}
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q_ac = rv34_qscale_tab[s->qscale];
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for(i = 0; i < 16; i++, cbp >>= 1){
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DCTELEM *ptr;
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if(!r->is16 && !(cbp & 1)) continue;
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blknum = ((i & 2) >> 1) + ((i & 8) >> 2);
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blkoff = ((i & 1) << 2) + ((i & 4) << 3);
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ptr = s->block[blknum] + blkoff;
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if(cbp & 1)
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rv34_decode_block(s->block[blknum] + blkoff, gb,
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r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
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has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
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else
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has_ac = 0;
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if(r->is16) //FIXME: optimize
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s->block[blknum][blkoff] = block16[(i & 3) | ((i & 0xC) << 1)];
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r->rdsp.rv34_inv_transform_tab[0](s->block[blknum] + blkoff);
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ptr[0] = block16[(i & 3) | ((i & 0xC) << 1)];
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if(has_ac)
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r->rdsp.rv34_inv_transform_tab[0](ptr);
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else
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r->rdsp.rv34_inv_transform_dc_tab[0](ptr);
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}
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if(r->block_type == RV34_MB_P_MIX16x16)
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r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
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q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
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q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
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for(; i < 24; i++, cbp >>= 1){
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DCTELEM *ptr;
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if(!(cbp & 1)) continue;
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blknum = ((i & 4) >> 2) + 4;
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blkoff = ((i & 1) << 2) + ((i & 2) << 4);
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rv34_decode_block(s->block[blknum] + blkoff, gb, r->cur_vlcs, r->chroma_vlc, 1, q_dc, q_ac, q_ac);
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r->rdsp.rv34_inv_transform_tab[0](s->block[blknum] + blkoff);
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ptr = s->block[blknum] + blkoff;
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if (rv34_decode_block(ptr, gb, r->cur_vlcs, r->chroma_vlc, 1, q_dc, q_ac, q_ac))
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r->rdsp.rv34_inv_transform_tab[0](ptr);
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else
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r->rdsp.rv34_inv_transform_dc_tab[0](ptr);
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}
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if (IS_INTRA(s->current_picture_ptr->f.mb_type[mb_pos]))
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rv34_output_macroblock(r, intra_types, cbp2, r->is16);
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@ -50,34 +50,22 @@ static const uint8_t rv34_cbp_code[16] = {
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* A lot of four-tuples in RV40 are represented as c0*27+c1*9+c2*3+c3.
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* This table allows conversion from a value back to a vector.
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*/
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static const uint8_t modulo_three_table[108][4] = {
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{ 0, 0, 0, 0 }, { 0, 0, 0, 1 }, { 0, 0, 0, 2 }, { 0, 0, 1, 0 },
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{ 0, 0, 1, 1 }, { 0, 0, 1, 2 }, { 0, 0, 2, 0 }, { 0, 0, 2, 1 },
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{ 0, 0, 2, 2 }, { 0, 1, 0, 0 }, { 0, 1, 0, 1 }, { 0, 1, 0, 2 },
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{ 0, 1, 1, 0 }, { 0, 1, 1, 1 }, { 0, 1, 1, 2 }, { 0, 1, 2, 0 },
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{ 0, 1, 2, 1 }, { 0, 1, 2, 2 }, { 0, 2, 0, 0 }, { 0, 2, 0, 1 },
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{ 0, 2, 0, 2 }, { 0, 2, 1, 0 }, { 0, 2, 1, 1 }, { 0, 2, 1, 2 },
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{ 0, 2, 2, 0 }, { 0, 2, 2, 1 }, { 0, 2, 2, 2 }, { 1, 0, 0, 0 },
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{ 1, 0, 0, 1 }, { 1, 0, 0, 2 }, { 1, 0, 1, 0 }, { 1, 0, 1, 1 },
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{ 1, 0, 1, 2 }, { 1, 0, 2, 0 }, { 1, 0, 2, 1 }, { 1, 0, 2, 2 },
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{ 1, 1, 0, 0 }, { 1, 1, 0, 1 }, { 1, 1, 0, 2 }, { 1, 1, 1, 0 },
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{ 1, 1, 1, 1 }, { 1, 1, 1, 2 }, { 1, 1, 2, 0 }, { 1, 1, 2, 1 },
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{ 1, 1, 2, 2 }, { 1, 2, 0, 0 }, { 1, 2, 0, 1 }, { 1, 2, 0, 2 },
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{ 1, 2, 1, 0 }, { 1, 2, 1, 1 }, { 1, 2, 1, 2 }, { 1, 2, 2, 0 },
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{ 1, 2, 2, 1 }, { 1, 2, 2, 2 }, { 2, 0, 0, 0 }, { 2, 0, 0, 1 },
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{ 2, 0, 0, 2 }, { 2, 0, 1, 0 }, { 2, 0, 1, 1 }, { 2, 0, 1, 2 },
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{ 2, 0, 2, 0 }, { 2, 0, 2, 1 }, { 2, 0, 2, 2 }, { 2, 1, 0, 0 },
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{ 2, 1, 0, 1 }, { 2, 1, 0, 2 }, { 2, 1, 1, 0 }, { 2, 1, 1, 1 },
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{ 2, 1, 1, 2 }, { 2, 1, 2, 0 }, { 2, 1, 2, 1 }, { 2, 1, 2, 2 },
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{ 2, 2, 0, 0 }, { 2, 2, 0, 1 }, { 2, 2, 0, 2 }, { 2, 2, 1, 0 },
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{ 2, 2, 1, 1 }, { 2, 2, 1, 2 }, { 2, 2, 2, 0 }, { 2, 2, 2, 1 },
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{ 2, 2, 2, 2 }, { 3, 0, 0, 0 }, { 3, 0, 0, 1 }, { 3, 0, 0, 2 },
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{ 3, 0, 1, 0 }, { 3, 0, 1, 1 }, { 3, 0, 1, 2 }, { 3, 0, 2, 0 },
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{ 3, 0, 2, 1 }, { 3, 0, 2, 2 }, { 3, 1, 0, 0 }, { 3, 1, 0, 1 },
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{ 3, 1, 0, 2 }, { 3, 1, 1, 0 }, { 3, 1, 1, 1 }, { 3, 1, 1, 2 },
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{ 3, 1, 2, 0 }, { 3, 1, 2, 1 }, { 3, 1, 2, 2 }, { 3, 2, 0, 0 },
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{ 3, 2, 0, 1 }, { 3, 2, 0, 2 }, { 3, 2, 1, 0 }, { 3, 2, 1, 1 },
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{ 3, 2, 1, 2 }, { 3, 2, 2, 0 }, { 3, 2, 2, 1 }, { 3, 2, 2, 2 },
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static const uint8_t modulo_three_table[108] = {
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0x00, 0x01, 0x02, 0x04, 0x05, 0x06, 0x08, 0x09, 0x0A,
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0x10, 0x11, 0x12, 0x14, 0x15, 0x16, 0x18, 0x19, 0x1A,
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0x20, 0x21, 0x22, 0x24, 0x25, 0x26, 0x28, 0x29, 0x2A,
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0x40, 0x41, 0x42, 0x44, 0x45, 0x46, 0x48, 0x49, 0x4A,
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0x50, 0x51, 0x52, 0x54, 0x55, 0x56, 0x58, 0x59, 0x5A,
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0x60, 0x61, 0x62, 0x64, 0x65, 0x66, 0x68, 0x69, 0x6A,
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0x80, 0x81, 0x82, 0x84, 0x85, 0x86, 0x88, 0x89, 0x8A,
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0x90, 0x91, 0x92, 0x94, 0x95, 0x96, 0x98, 0x99, 0x9A,
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0xA0, 0xA1, 0xA2, 0xA4, 0xA5, 0xA6, 0xA8, 0xA9, 0xAA,
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0xC0, 0xC1, 0xC2, 0xC4, 0xC5, 0xC6, 0xC8, 0xC9, 0xCA,
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0xD0, 0xD1, 0xD2, 0xD4, 0xD5, 0xD6, 0xD8, 0xD9, 0xDA,
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0xE0, 0xE1, 0xE2, 0xE4, 0xE5, 0xE6, 0xE8, 0xE9, 0xEA,
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};
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/**
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@ -97,13 +97,37 @@ static void rv34_inv_transform_noround_c(DCTELEM *block){
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}
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}
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static void rv34_inv_transform_dc_c(DCTELEM *block)
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{
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DCTELEM dc = (13 * 13 * block[0] + 0x200) >> 10;
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int i, j;
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for (i = 0; i < 4; i++, block += 8)
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for (j = 0; j < 4; j++)
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block[j] = dc;
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}
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static void rv34_inv_transform_dc_noround_c(DCTELEM *block)
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{
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DCTELEM dc = (13 * 13 * 3 * block[0]) >> 11;
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int i, j;
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for (i = 0; i < 4; i++, block += 8)
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for (j = 0; j < 4; j++)
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block[j] = dc;
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}
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/** @} */ // transform
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av_cold void ff_rv34dsp_init(RV34DSPContext *c, DSPContext* dsp) {
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c->rv34_inv_transform_tab[0] = rv34_inv_transform_c;
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c->rv34_inv_transform_tab[1] = rv34_inv_transform_noround_c;
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c->rv34_inv_transform_dc_tab[0] = rv34_inv_transform_dc_c;
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c->rv34_inv_transform_dc_tab[1] = rv34_inv_transform_dc_noround_c;
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if (HAVE_NEON)
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ff_rv34dsp_init_neon(c, dsp);
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if (HAVE_MMX)
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ff_rv34dsp_init_x86(c, dsp);
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}
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@ -56,6 +56,7 @@ typedef struct RV34DSPContext {
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h264_chroma_mc_func avg_chroma_pixels_tab[3];
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rv40_weight_func rv40_weight_pixels_tab[2];
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rv34_inv_transform_func rv34_inv_transform_tab[2];
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void (*rv34_inv_transform_dc_tab[2])(DCTELEM *block);
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rv40_weak_loop_filter_func rv40_weak_loop_filter[2];
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rv40_strong_loop_filter_func rv40_strong_loop_filter[2];
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rv40_loop_filter_strength_func rv40_loop_filter_strength[2];
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@ -66,6 +67,7 @@ void ff_rv34dsp_init(RV34DSPContext *c, DSPContext* dsp);
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void ff_rv40dsp_init(RV34DSPContext *c, DSPContext* dsp);
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void ff_rv34dsp_init_neon(RV34DSPContext *c, DSPContext *dsp);
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void ff_rv34dsp_init_x86(RV34DSPContext *c, DSPContext *dsp);
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void ff_rv40dsp_init_x86(RV34DSPContext *c, DSPContext *dsp);
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void ff_rv40dsp_init_neon(RV34DSPContext *c, DSPContext *dsp);
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@ -24,7 +24,11 @@ YASM-OBJS-$(CONFIG_H264PRED) += x86/h264_intrapred.o \
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x86/h264_intrapred_10bit.o
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MMX-OBJS-$(CONFIG_H264PRED) += x86/h264_intrapred_init.o
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MMX-OBJS-$(CONFIG_RV40_DECODER) += x86/rv40dsp.o \
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MMX-OBJS-$(CONFIG_RV30_DECODER) += x86/rv34dsp_init.o
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YASM-OBJS-$(CONFIG_RV30_DECODER) += x86/rv34dsp.o
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MMX-OBJS-$(CONFIG_RV40_DECODER) += x86/rv34dsp_init.o \
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x86/rv40dsp.o
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YASM-OBJS-$(CONFIG_RV40_DECODER) += x86/rv34dsp.o
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YASM-OBJS-$(CONFIG_VC1_DECODER) += x86/vc1dsp_yasm.o
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55
libavcodec/x86/rv34dsp.asm
Normal file
55
libavcodec/x86/rv34dsp.asm
Normal file
@ -0,0 +1,55 @@
|
||||
;******************************************************************************
|
||||
;* MMX/SSE2-optimized functions for the RV30 and RV40 decoders
|
||||
;* Copyright (C) 2012 Christophe Gisquet <christophe.gisquet@gmail.com>
|
||||
;*
|
||||
;* This file is part of Libav.
|
||||
;*
|
||||
;* Libav is free software; you can redistribute it and/or
|
||||
;* modify it under the terms of the GNU Lesser General Public
|
||||
;* License as published by the Free Software Foundation; either
|
||||
;* version 2.1 of the License, or (at your option) any later version.
|
||||
;*
|
||||
;* Libav is distributed in the hope that it will be useful,
|
||||
;* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
;* Lesser General Public License for more details.
|
||||
;*
|
||||
;* You should have received a copy of the GNU Lesser General Public
|
||||
;* License along with Libav; if not, write to the Free Software
|
||||
;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
;******************************************************************************
|
||||
|
||||
%include "x86inc.asm"
|
||||
%include "x86util.asm"
|
||||
|
||||
SECTION .text
|
||||
|
||||
%macro IDCT_DC_NOROUND 1
|
||||
imul %1, 13*13*3
|
||||
sar %1, 11
|
||||
%endmacro
|
||||
|
||||
%macro IDCT_DC_ROUND 1
|
||||
imul %1, 13*13
|
||||
add %1, 0x200
|
||||
sar %1, 10
|
||||
%endmacro
|
||||
|
||||
%macro rv34_idct_dequant4x4_dc 1
|
||||
cglobal rv34_idct_dequant4x4_%1_mmx2, 1, 2, 0
|
||||
movsx r1, word [r0]
|
||||
IDCT_DC r1
|
||||
movd mm0, r1
|
||||
pshufw mm0, mm0, 0
|
||||
movq [r0+ 0], mm0
|
||||
movq [r0+16], mm0
|
||||
movq [r0+32], mm0
|
||||
movq [r0+48], mm0
|
||||
REP_RET
|
||||
%endmacro
|
||||
|
||||
INIT_MMX
|
||||
%define IDCT_DC IDCT_DC_ROUND
|
||||
rv34_idct_dequant4x4_dc dc
|
||||
%define IDCT_DC IDCT_DC_NOROUND
|
||||
rv34_idct_dequant4x4_dc dc_noround
|
||||
40
libavcodec/x86/rv34dsp_init.c
Normal file
40
libavcodec/x86/rv34dsp_init.c
Normal file
@ -0,0 +1,40 @@
|
||||
/*
|
||||
* RV30/40 MMX/SSE2 optimizations
|
||||
* Copyright (C) 2012 Christophe Gisquet <christophe.gisquet@gmail.com>
|
||||
*
|
||||
* This file is part of Libav.
|
||||
*
|
||||
* Libav is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* Libav is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with Libav; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include "libavutil/cpu.h"
|
||||
#include "libavutil/x86_cpu.h"
|
||||
#include "libavcodec/dsputil.h"
|
||||
#include "libavcodec/rv34dsp.h"
|
||||
|
||||
void ff_rv34_idct_dequant4x4_dc_mmx2(DCTELEM *block);
|
||||
void ff_rv34_idct_dequant4x4_dc_noround_mmx2(DCTELEM *block);
|
||||
|
||||
av_cold void ff_rv34dsp_init_x86(RV34DSPContext* c, DSPContext *dsp)
|
||||
{
|
||||
#if HAVE_YASM
|
||||
int mm_flags = av_get_cpu_flags();
|
||||
|
||||
if (mm_flags & AV_CPU_FLAG_MMX2) {
|
||||
c->rv34_inv_transform_dc_tab[0] = ff_rv34_idct_dequant4x4_dc_mmx2;
|
||||
c->rv34_inv_transform_dc_tab[1] = ff_rv34_idct_dequant4x4_dc_noround_mmx2;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user