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author | Kostya Shishkov <kostya.shishkov@gmail.com> | 2008-07-23 06:21:27 +0000 |
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committer | Kostya Shishkov <kostya.shishkov@gmail.com> | 2008-07-23 06:21:27 +0000 |
commit | 00a750009ffe232960ab0f729fdcbd454b233e26 (patch) | |
tree | 20a18b7bb0ea8124e8de7286a5e9e71a3e41733c /libavcodec/vc1.c | |
parent | 144b46f21bec16501f30ec3dae1a60261144a8e8 (diff) | |
download | ffmpeg-streaming-00a750009ffe232960ab0f729fdcbd454b233e26.zip ffmpeg-streaming-00a750009ffe232960ab0f729fdcbd454b233e26.tar.gz |
In-loop deblocking filter for VC-1 decoder
Originally committed as revision 14344 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/vc1.c')
-rw-r--r-- | libavcodec/vc1.c | 180 |
1 files changed, 171 insertions, 9 deletions
diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c index 6edf746..fe91d61 100644 --- a/libavcodec/vc1.c +++ b/libavcodec/vc1.c @@ -306,6 +306,79 @@ static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v) /** @} */ //Bitplane group +#define FILTSIGN(a) ((a) >= 0 ? 1 : -1) +/** + * VC-1 in-loop deblocking filter for one line + * @param src source block type + * @param pq block quantizer + * @return whether other 3 pairs should be filtered or not + * @see 8.6 + */ +static int vc1_filter_line(uint8_t* src, int stride, int pq){ + int a0, a1, a2, a3, d, clip, filt3 = 0; + uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; + + a0 = (2*(src[-2*stride] - src[ 1*stride]) - 5*(src[-1*stride] - src[ 0*stride]) + 4) >> 3; + if(FFABS(a0) < pq){ + a1 = (2*(src[-4*stride] - src[-1*stride]) - 5*(src[-3*stride] - src[-2*stride]) + 4) >> 3; + a2 = (2*(src[ 0*stride] - src[ 3*stride]) - 5*(src[ 1*stride] - src[ 2*stride]) + 4) >> 3; + a3 = FFMIN(FFABS(a1), FFABS(a2)); + if(a3 < FFABS(a0)){ + d = 5 * ((a0 >=0 ? a3 : -a3) - a0) / 8; + clip = (src[-1*stride] - src[ 0*stride])/2; + if(clip){ + filt3 = 1; + if(clip > 0) + d = av_clip(d, 0, clip); + else + d = av_clip(d, clip, 0); + src[-1*stride] = cm[src[-1*stride] - d]; + src[ 0*stride] = cm[src[ 0*stride] + d]; + } + } + } + return filt3; +} + +/** + * VC-1 in-loop deblocking filter + * @param src source block type + * @param len edge length to filter (4 or 8 pixels) + * @param pq block quantizer + * @see 8.6 + */ +static void vc1_loop_filter(uint8_t* src, int step, int stride, int len, int pq) +{ + int i; + int filt3; + + for(i = 0; i < len; i += 4){ + filt3 = vc1_filter_line(src + 2*step, stride, pq); + if(filt3){ + vc1_filter_line(src + 0*step, stride, pq); + vc1_filter_line(src + 1*step, stride, pq); + vc1_filter_line(src + 3*step, stride, pq); + } + src += step * 4; + } +} + +static void vc1_loop_filter_iblk(MpegEncContext *s, int pq) +{ + int i, j; + if(!s->first_slice_line) + vc1_loop_filter(s->dest[0], 1, s->linesize, 16, pq); + vc1_loop_filter(s->dest[0] + 8*s->linesize, 1, s->linesize, 16, pq); + for(i = !s->mb_x*8; i < 16; i += 8) + vc1_loop_filter(s->dest[0] + i, s->linesize, 1, 16, pq); + for(j = 0; j < 2; j++){ + if(!s->first_slice_line) + vc1_loop_filter(s->dest[j+1], 1, s->uvlinesize, 8, pq); + if(s->mb_x) + vc1_loop_filter(s->dest[j+1], s->uvlinesize, 1, 8, pq); + } +} + /***********************************************************************/ /** VOP Dquant decoding * @param v VC-1 Context @@ -2887,7 +2960,7 @@ static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int c /** Decode P block */ static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block, - uint8_t *dst, int linesize, int skip_block) + uint8_t *dst, int linesize, int skip_block, int apply_filter, int cbp_top, int cbp_left) { MpegEncContext *s = &v->s; GetBitContext *gb = &s->gb; @@ -2895,6 +2968,7 @@ static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquan int subblkpat = 0; int scale, off, idx, last, skip, value; int ttblk = ttmb & 7; + int pat = 0; if(ttmb == -1) { ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)]; @@ -2921,6 +2995,7 @@ static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquan } switch(ttblk) { case TT_8X8: + pat = 0xF; i = 0; last = 0; while (!last) { @@ -2936,9 +3011,14 @@ static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquan if(!skip_block){ s->dsp.vc1_inv_trans_8x8(block); s->dsp.add_pixels_clamped(block, dst, linesize); + if(apply_filter && cbp_top & 0xC) + vc1_loop_filter(dst, 1, linesize, 8, mquant); + if(apply_filter && cbp_left & 0xA) + vc1_loop_filter(dst, linesize, 1, 8, mquant); } break; case TT_4X4: + pat = ~subblkpat & 0xF; for(j = 0; j < 4; j++) { last = subblkpat & (1 << (3 - j)); i = 0; @@ -2953,11 +3033,17 @@ static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquan if(!v->pquantizer) block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant; } - if(!(subblkpat & (1 << (3 - j))) && !skip_block) + if(!(subblkpat & (1 << (3 - j))) && !skip_block){ s->dsp.vc1_inv_trans_4x4(dst + (j&1)*4 + (j&2)*2*linesize, linesize, block + off); + if(apply_filter && (j&2 ? pat & (1<<(j-2)) : (cbp_top & (1 << (j + 2))))) + vc1_loop_filter(dst + (j&1)*4 + (j&2)*2*linesize, 1, linesize, 4, mquant); + if(apply_filter && (j&1 ? pat & (1<<(j-1)) : (cbp_left & (1 << (j + 1))))) + vc1_loop_filter(dst + (j&1)*4 + (j&2)*2*linesize, linesize, 1, 4, mquant); + } } break; case TT_8X4: + pat = ~((subblkpat & 2)*6 + (subblkpat & 1)*3) & 0xF; for(j = 0; j < 2; j++) { last = subblkpat & (1 << (1 - j)); i = 0; @@ -2972,11 +3058,17 @@ static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquan if(!v->pquantizer) block[idx] += (block[idx] < 0) ? -mquant : mquant; } - if(!(subblkpat & (1 << (1 - j))) && !skip_block) + if(!(subblkpat & (1 << (1 - j))) && !skip_block){ s->dsp.vc1_inv_trans_8x4(dst + j*4*linesize, linesize, block + off); + if(apply_filter && j ? pat & 0x3 : (cbp_top & 0xC)) + vc1_loop_filter(dst + j*4*linesize, 1, linesize, 8, mquant); + if(apply_filter && cbp_left & (2 << j)) + vc1_loop_filter(dst + j*4*linesize, linesize, 1, 4, mquant); + } } break; case TT_4X8: + pat = ~(subblkpat*5) & 0xF; for(j = 0; j < 2; j++) { last = subblkpat & (1 << (1 - j)); i = 0; @@ -2991,12 +3083,17 @@ static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquan if(!v->pquantizer) block[idx] += (block[idx] < 0) ? -mquant : mquant; } - if(!(subblkpat & (1 << (1 - j))) && !skip_block) + if(!(subblkpat & (1 << (1 - j))) && !skip_block){ s->dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off); + if(apply_filter && cbp_top & (2 << j)) + vc1_loop_filter(dst + j*4, 1, linesize, 4, mquant); + if(apply_filter && j ? pat & 0x5 : (cbp_left & 0xA)) + vc1_loop_filter(dst + j*4, linesize, 1, 8, mquant); + } } break; } - return 0; + return pat; } @@ -3022,6 +3119,7 @@ static int vc1_decode_p_mb(VC1Context *v) int first_block = 1; int dst_idx, off; int skipped, fourmv; + int block_cbp = 0, pat; mquant = v->pq; /* Loosy initialization */ @@ -3100,8 +3198,35 @@ static int vc1_decode_p_mb(VC1Context *v) if(v->a_avail) s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2)); } + if(v->s.loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){ + int left_cbp, top_cbp; + if(i & 4){ + left_cbp = v->cbp[s->mb_x - 1] >> (i * 4); + top_cbp = v->cbp[s->mb_x - s->mb_stride] >> (i * 4); + }else{ + left_cbp = (i & 1) ? (pat >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4)); + top_cbp = (i & 2) ? (pat >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4)); + } + if(left_cbp & 0xC) + vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant); + if(top_cbp & 0xA) + vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant); + } + block_cbp |= 0xF << (i << 2); } else if(val) { - vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY)); + int left_cbp = 0, top_cbp = 0, filter = 0; + if(v->s.loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){ + filter = 1; + if(i & 4){ + left_cbp = v->cbp[s->mb_x - 1] >> (i * 4); + top_cbp = v->cbp[s->mb_x - s->mb_stride] >> (i * 4); + }else{ + left_cbp = (i & 1) ? (pat >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4)); + top_cbp = (i & 2) ? (pat >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4)); + } + } + pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY), filter, left_cbp, top_cbp); + block_cbp |= pat << (i << 2); if(!v->ttmbf && ttmb < 8) ttmb = -1; first_block = 0; } @@ -3200,13 +3325,40 @@ static int vc1_decode_p_mb(VC1Context *v) if(v->a_avail) s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2)); } + if(v->s.loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){ + int left_cbp, top_cbp; + if(i & 4){ + left_cbp = v->cbp[s->mb_x - 1] >> (i * 4); + top_cbp = v->cbp[s->mb_x - s->mb_stride] >> (i * 4); + }else{ + left_cbp = (i & 1) ? (pat >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4)); + top_cbp = (i & 2) ? (pat >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4)); + } + if(left_cbp & 0xC) + vc1_loop_filter(s->dest[dst_idx] + off, 1, i & 4 ? s->uvlinesize : s->linesize, 8, mquant); + if(top_cbp & 0xA) + vc1_loop_filter(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize, 1, 8, mquant); + } + block_cbp |= 0xF << (i << 2); } else if(is_coded[i]) { - status = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY)); + int left_cbp = 0, top_cbp = 0, filter = 0; + if(v->s.loop_filter && s->mb_x && s->mb_x != (s->mb_width - 1) && s->mb_y && s->mb_y != (s->mb_height - 1)){ + filter = 1; + if(i & 4){ + left_cbp = v->cbp[s->mb_x - 1] >> (i * 4); + top_cbp = v->cbp[s->mb_x - s->mb_stride] >> (i * 4); + }else{ + left_cbp = (i & 1) ? (pat >> ((i-1)*4)) : (v->cbp[s->mb_x - 1] >> ((i+1)*4)); + top_cbp = (i & 2) ? (pat >> ((i-2)*4)) : (v->cbp[s->mb_x - s->mb_stride] >> ((i+2)*4)); + } + } + pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY), filter, left_cbp, top_cbp); + block_cbp |= pat << (i << 2); if(!v->ttmbf && ttmb < 8) ttmb = -1; first_block = 0; } } - return status; + return 0; } else //Skipped MB { @@ -3226,6 +3378,7 @@ static int vc1_decode_p_mb(VC1Context *v) return 0; } } + v->cbp[s->mb_x] = block_cbp; /* Should never happen */ return -1; @@ -3373,7 +3526,7 @@ static void vc1_decode_b_mb(VC1Context *v) if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1; s->dsp.put_signed_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2)); } else if(val) { - vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY)); + vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block, s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize, (i&4) && (s->flags & CODEC_FLAG_GRAY), 0, 0, 0); if(!v->ttmbf && ttmb < 8) ttmb = -1; first_block = 0; } @@ -3479,6 +3632,7 @@ static void vc1_decode_i_blocks(VC1Context *v) s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize); s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize); } + if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[mb_pos]); if(get_bits_count(&s->gb) > v->bits) { ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)); @@ -3609,6 +3763,7 @@ static void vc1_decode_i_blocks_adv(VC1Context *v) s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize); s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize); } + if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[mb_pos]); if(get_bits_count(&s->gb) > v->bits) { ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)); @@ -3652,6 +3807,7 @@ static void vc1_decode_p_blocks(VC1Context *v) } s->first_slice_line = 1; + memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride); for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) { for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) { ff_init_block_index(s); @@ -3665,6 +3821,7 @@ static void vc1_decode_p_blocks(VC1Context *v) return; } } + memmove(v->cbp_base, v->cbp, sizeof(v->cbp_base[0])*s->mb_stride); ff_draw_horiz_band(s, s->mb_y * 16, 16); s->first_slice_line = 0; } @@ -3713,6 +3870,7 @@ static void vc1_decode_b_blocks(VC1Context *v) av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n", get_bits_count(&s->gb), v->bits,s->mb_x,s->mb_y); return; } + if(v->s.loop_filter) vc1_loop_filter_iblk(s, s->current_picture.qscale_table[s->mb_x + s->mb_y *s->mb_stride]); } ff_draw_horiz_band(s, s->mb_y * 16, 16); s->first_slice_line = 0; @@ -3918,6 +4076,9 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx) v->acpred_plane = av_malloc(s->mb_stride * s->mb_height); v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height); + v->cbp_base = av_malloc(sizeof(v->cbp_base[0]) * 2 * s->mb_stride); + v->cbp = v->cbp_base + s->mb_stride; + /* allocate block type info in that way so it could be used with s->block_index[] */ v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2); v->mb_type[0] = v->mb_type_base + s->b8_stride + 1; @@ -4122,6 +4283,7 @@ static av_cold int vc1_decode_end(AVCodecContext *avctx) av_freep(&v->acpred_plane); av_freep(&v->over_flags_plane); av_freep(&v->mb_type_base); + av_freep(&v->cbp_base); ff_intrax8_common_end(&v->x8); return 0; } |