}
for(i = 0; i < 4; i++){
- t = modulo_three_table[code][i];
+ t = (modulo_three_table[code] >> (6 - 2*i)) & 3;
if(t == 1)
cbp |= cbp_masks[get_bits1(gb)] << i;
if(t == 2)
*/
static inline void decode_subblock(DCTELEM *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc, int q)
{
- int coeffs[4];
+ int flags = modulo_three_table[code];
- coeffs[0] = modulo_three_table[code][0];
- coeffs[1] = modulo_three_table[code][1];
- coeffs[2] = modulo_three_table[code][2];
- coeffs[3] = modulo_three_table[code][3];
- decode_coeff(dst , coeffs[0], 3, gb, vlc, q);
+ decode_coeff( dst+0, (flags >> 6) , 3, gb, vlc, q);
if(is_block2){
- decode_coeff(dst+8, coeffs[1], 2, gb, vlc, q);
- decode_coeff(dst+1, coeffs[2], 2, gb, vlc, q);
+ decode_coeff(dst+8, (flags >> 4) & 3, 2, gb, vlc, q);
+ decode_coeff(dst+1, (flags >> 2) & 3, 2, gb, vlc, q);
}else{
- decode_coeff(dst+1, coeffs[1], 2, gb, vlc, q);
- decode_coeff(dst+8, coeffs[2], 2, gb, vlc, q);
+ decode_coeff(dst+1, (flags >> 4) & 3, 2, gb, vlc, q);
+ decode_coeff(dst+8, (flags >> 2) & 3, 2, gb, vlc, q);
}
- decode_coeff(dst+9, coeffs[3], 2, gb, vlc, q);
+ decode_coeff( dst+9, (flags >> 0) & 3, 2, gb, vlc, q);
+}
+
+/**
+ * Decode a single coefficient.
+ */
+static inline void decode_subblock1(DCTELEM *dst, int code, GetBitContext *gb, VLC *vlc, int q)
+{
+ int coeff = modulo_three_table[code] >> 6;
+ decode_coeff(dst, coeff, 3, gb, vlc, q);
}
static inline void decode_subblock3(DCTELEM *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc,
int q_dc, int q_ac1, int q_ac2)
{
- int coeffs[4];
+ int flags = modulo_three_table[code];
- coeffs[0] = modulo_three_table[code][0];
- coeffs[1] = modulo_three_table[code][1];
- coeffs[2] = modulo_three_table[code][2];
- coeffs[3] = modulo_three_table[code][3];
- decode_coeff(dst , coeffs[0], 3, gb, vlc, q_dc);
+ decode_coeff( dst+0, (flags >> 6) , 3, gb, vlc, q_dc);
if(is_block2){
- decode_coeff(dst+8, coeffs[1], 2, gb, vlc, q_ac1);
- decode_coeff(dst+1, coeffs[2], 2, gb, vlc, q_ac1);
+ decode_coeff(dst+8, (flags >> 4) & 3, 2, gb, vlc, q_ac1);
+ decode_coeff(dst+1, (flags >> 2) & 3, 2, gb, vlc, q_ac1);
}else{
- decode_coeff(dst+1, coeffs[1], 2, gb, vlc, q_ac1);
- decode_coeff(dst+8, coeffs[2], 2, gb, vlc, q_ac1);
+ decode_coeff(dst+1, (flags >> 4) & 3, 2, gb, vlc, q_ac1);
+ decode_coeff(dst+8, (flags >> 2) & 3, 2, gb, vlc, q_ac1);
}
- decode_coeff(dst+9, coeffs[3], 2, gb, vlc, q_ac2);
+ decode_coeff( dst+9, (flags >> 0) & 3, 2, gb, vlc, q_ac2);
}
/**
* o--o
*/
-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)
+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)
{
- int code, pattern;
+ int code, pattern, has_ac = 1;
code = get_vlc2(gb, rvlc->first_pattern[fc].table, 9, 2);
pattern = code & 0x7;
code >>= 3;
- decode_subblock3(dst, code, 0, gb, &rvlc->coefficient, q_dc, q_ac1, q_ac2);
+
+ if (modulo_three_table[code] & 0x3F) {
+ decode_subblock3(dst, code, 0, gb, &rvlc->coefficient, q_dc, q_ac1, q_ac2);
+ } else {
+ decode_subblock1(dst, code, gb, &rvlc->coefficient, q_dc);
+ if (!pattern)
+ return 0;
+ has_ac = 0;
+ }
if(pattern & 4){
code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
code = get_vlc2(gb, rvlc->third_pattern[sc].table, 9, 2);
decode_subblock(dst + 8*2+2, code, 0, gb, &rvlc->coefficient, q_ac2);
}
-
+ return has_ac || pattern;
}
/**
if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
/* wait for the referenced mb row to be finished */
- int mb_row = FFMIN(s->mb_height - 1, s->mb_y + ((yoff + my + 21) >> 4));
+ int mb_row = FFMIN(s->mb_height - 1,
+ s->mb_y + ((yoff + my + 5 + 8 * height) >> 4));
AVFrame *f = dir ? &s->next_picture_ptr->f : &s->last_picture_ptr->f;
ff_thread_await_progress(f, mb_row, 0);
}
//surprisingly, it uses motion scheme from next reference frame
/* wait for the current mb row to be finished */
if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
- ff_thread_await_progress(&s->next_picture_ptr->f, s->mb_y - 1, 0);
+ ff_thread_await_progress(&s->next_picture_ptr->f, FFMAX(0, s->mb_y-1), 0);
next_bt = s->next_picture_ptr->f.mb_type[s->mb_x + s->mb_y * s->mb_stride];
if(IS_INTRA(next_bt) || IS_SKIP(next_bt)){
MpegEncContext *s = &r->s;
GetBitContext *gb = &s->gb;
int cbp, cbp2;
- int q_dc, q_ac;
+ int q_dc, q_ac, has_ac;
int i, blknum, blkoff;
LOCAL_ALIGNED_16(DCTELEM, block16, [64]);
int luma_dc_quant;
if(r->is16){
q_dc = rv34_qscale_tab[luma_dc_quant];
q_ac = rv34_qscale_tab[s->qscale];
- memset(block16, 0, 64 * sizeof(*block16));
- rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac);
- r->rdsp.rv34_inv_transform_tab[1](block16);
+ s->dsp.clear_block(block16);
+ if (rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac))
+ r->rdsp.rv34_inv_transform_tab[1](block16);
+ else
+ r->rdsp.rv34_inv_transform_dc_tab[1](block16);
}
q_ac = rv34_qscale_tab[s->qscale];
for(i = 0; i < 16; i++, cbp >>= 1){
+ DCTELEM *ptr;
if(!r->is16 && !(cbp & 1)) continue;
blknum = ((i & 2) >> 1) + ((i & 8) >> 2);
blkoff = ((i & 1) << 2) + ((i & 4) << 3);
+ ptr = s->block[blknum] + blkoff;
if(cbp & 1)
- rv34_decode_block(s->block[blknum] + blkoff, gb,
- r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
+ has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
+ else
+ has_ac = 0;
if(r->is16) //FIXME: optimize
- s->block[blknum][blkoff] = block16[(i & 3) | ((i & 0xC) << 1)];
- r->rdsp.rv34_inv_transform_tab[0](s->block[blknum] + blkoff);
+ ptr[0] = block16[(i & 3) | ((i & 0xC) << 1)];
+ if(has_ac)
+ r->rdsp.rv34_inv_transform_tab[0](ptr);
+ else
+ r->rdsp.rv34_inv_transform_dc_tab[0](ptr);
}
if(r->block_type == RV34_MB_P_MIX16x16)
r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
for(; i < 24; i++, cbp >>= 1){
+ DCTELEM *ptr;
if(!(cbp & 1)) continue;
blknum = ((i & 4) >> 2) + 4;
blkoff = ((i & 1) << 2) + ((i & 2) << 4);
- rv34_decode_block(s->block[blknum] + blkoff, gb, r->cur_vlcs, r->chroma_vlc, 1, q_dc, q_ac, q_ac);
- r->rdsp.rv34_inv_transform_tab[0](s->block[blknum] + blkoff);
+ ptr = s->block[blknum] + blkoff;
+ if (rv34_decode_block(ptr, gb, r->cur_vlcs, r->chroma_vlc, 1, q_dc, q_ac, q_ac))
+ r->rdsp.rv34_inv_transform_tab[0](ptr);
+ else
+ r->rdsp.rv34_inv_transform_dc_tab[0](ptr);
}
if (IS_INTRA(s->current_picture_ptr->f.mb_type[mb_pos]))
rv34_output_macroblock(r, intra_types, cbp2, r->is16);
projects / ffmpeg / blobdiff