[Ffmpeg-cvslog] r5535 - trunk/libavcodec/vc1.c
kostya
subversion
Tue Jun 27 17:37:49 CEST 2006
Author: kostya
Date: Tue Jun 27 17:37:48 2006
New Revision: 5535
Modified:
trunk/libavcodec/vc1.c
Log:
Added loop filtering as ersatz for overlap filter (improves picture quality for coarse quantization).
Modified: trunk/libavcodec/vc1.c
==============================================================================
--- trunk/libavcodec/vc1.c (original)
+++ trunk/libavcodec/vc1.c Tue Jun 27 17:37:48 2006
@@ -311,6 +311,7 @@
int codingset; ///< index of current table set from 11.8 to use for luma block decoding
int codingset2; ///< index of current table set from 11.8 to use for chroma block decoding
int pqindex; ///< raw pqindex used in coding set selection
+ int a_avail, c_avail;
/** Luma compensation parameters */
@@ -1853,7 +1854,7 @@
int16_t *ac_val, *ac_val2;
int dcdiff;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
- int a_avail, c_avail;
+ int a_avail = v->a_avail, c_avail = v->c_avail;
/* XXX: Guard against dumb values of mquant */
mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );
@@ -1862,12 +1863,6 @@
s->y_dc_scale = s->y_dc_scale_table[mquant];
s->c_dc_scale = s->c_dc_scale_table[mquant];
- /* check if prediction blocks A and C are available */
- a_avail = c_avail = 0;
- if((n == 2 || n == 3) || (s->mb_y && IS_INTRA(s->current_picture.mb_type[mb_pos - s->mb_stride])))
- a_avail = 1;
- if((n == 1 || n == 3) || (s->mb_x && IS_INTRA(s->current_picture.mb_type[mb_pos - 1])))
- c_avail = 1;
/* Get DC differential */
if (n < 4) {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
@@ -1925,7 +1920,7 @@
int scale;
int k;
- scale = mquant * 2 + v->halfpq;
+ scale = mquant * 2;
zz_table = vc1_simple_progressive_8x8_zz;
@@ -2014,7 +2009,7 @@
dc_pred_dir = 1;
}
- scale = mquant * 2 + v->halfpq;
+ scale = mquant * 2;
memset(ac_val2, 0, 16 * 2);
if(dc_pred_dir) {//left
ac_val -= 16;
@@ -2068,6 +2063,7 @@
}
if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {
subblkpat = decode012(gb);
+ if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits
if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;
if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;
}
@@ -2224,10 +2220,22 @@
val = ((cbp >> (5 - i)) & 1);
off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
if(s->mb_intra) {
+ /* check if prediction blocks A and C are available */
+ v->a_avail = v->c_avail = 0;
+ if((i == 2 || i == 3) || (s->mb_y && IS_INTRA(s->current_picture.mb_type[mb_pos - s->mb_stride])))
+ v->a_avail = 1;
+ if((i == 1 || i == 3) || (s->mb_x && IS_INTRA(s->current_picture.mb_type[mb_pos - 1])))
+ v->c_avail = 1;
+
vc1_decode_intra_block(v, block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
vc1_inv_trans(s->block[i], 8, 8);
for(j = 0; j < 64; j++) s->block[i][j] += 128;
s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
+ /* TODO: proper loop filtering */
+ if(v->a_avail)
+ s->dsp.h263_v_loop_filter(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2), s->y_dc_scale);
+ if(v->c_avail)
+ s->dsp.h263_h_loop_filter(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2), s->y_dc_scale);
} else if(val) {
vc1_decode_p_block(v, block[i], i, mquant, ttmb, first_block);
if(!v->ttmbf && ttmb < 8) ttmb = -1;
@@ -2361,6 +2369,7 @@
for(k = 0; k < 6; k++) {
val = ((cbp >> (5 - k)) & 1);
+
if (k < 4) {
int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
val = val ^ pred;
@@ -2377,6 +2386,24 @@
}
vc1_put_block(v, s->block);
+ if(v->pq >= 9 && v->overlap) { /* XXX: do proper overlapping insted of loop filter */
+ if(s->mb_y) {
+ s->dsp.h263_v_loop_filter(s->dest[0], s->linesize, s->y_dc_scale);
+ s->dsp.h263_v_loop_filter(s->dest[0] + 8, s->linesize, s->y_dc_scale);
+ s->dsp.h263_v_loop_filter(s->dest[1], s->uvlinesize, s->y_dc_scale);
+ s->dsp.h263_v_loop_filter(s->dest[2], s->uvlinesize, s->y_dc_scale);
+ }
+ s->dsp.h263_v_loop_filter(s->dest[0] + 8 * s->linesize, s->linesize, s->y_dc_scale);
+ s->dsp.h263_v_loop_filter(s->dest[0] + 8 * s->linesize + 8, s->linesize, s->y_dc_scale);
+ if(s->mb_x) {
+ s->dsp.h263_h_loop_filter(s->dest[0], s->linesize, s->y_dc_scale);
+ s->dsp.h263_h_loop_filter(s->dest[0] + 8 * s->linesize, s->linesize, s->y_dc_scale);
+ s->dsp.h263_h_loop_filter(s->dest[1], s->uvlinesize, s->y_dc_scale);
+ s->dsp.h263_h_loop_filter(s->dest[2], s->uvlinesize, s->y_dc_scale);
+ }
+ s->dsp.h263_h_loop_filter(s->dest[0] + 8, s->linesize, s->y_dc_scale);
+ s->dsp.h263_h_loop_filter(s->dest[0] + 8 * s->linesize + 8, s->linesize, s->y_dc_scale);
+ }
if(get_bits_count(&s->gb) > v->bits) {
av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);
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