2011-11-02 17:10:40 +00:00
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/*
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* Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
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*
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2011-11-25 00:38:21 +00:00
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* This file is part of FFmpeg.
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2011-11-02 17:10:40 +00:00
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*
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2011-11-25 00:38:21 +00:00
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* FFmpeg is free software; you can redistribute it and/or
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2011-11-02 17:10:40 +00:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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2011-11-25 00:38:21 +00:00
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* FFmpeg is distributed in the hope that it will be useful,
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2011-11-02 17:10:40 +00:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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2011-11-25 00:38:21 +00:00
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* License along with FFmpeg; if not, write to the Free Software
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2011-11-02 17:10:40 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/intmath.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "avcodec.h"
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2013-01-14 21:30:30 +00:00
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#include "snow_dwt.h"
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2012-11-10 12:22:56 +00:00
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#include "internal.h"
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2011-11-02 17:10:40 +00:00
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#include "snow.h"
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#include "rangecoder.h"
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#include "mathops.h"
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#include "mpegvideo.h"
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#include "h263.h"
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static av_always_inline void predict_slice_buffered(SnowContext *s, slice_buffer * sb, IDWTELEM * old_buffer, int plane_index, int add, int mb_y){
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Plane *p= &s->plane[plane_index];
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const int mb_w= s->b_width << s->block_max_depth;
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const int mb_h= s->b_height << s->block_max_depth;
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int x, y, mb_x;
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int block_size = MB_SIZE >> s->block_max_depth;
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2012-06-22 13:17:33 +00:00
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int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
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int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
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const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
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int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
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2013-03-10 22:43:52 +00:00
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int ref_stride= s->current_picture->linesize[plane_index];
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uint8_t *dst8= s->current_picture->data[plane_index];
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2011-11-02 17:10:40 +00:00
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int w= p->width;
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int h= p->height;
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if(s->keyframe || (s->avctx->debug&512)){
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if(mb_y==mb_h)
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return;
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if(add){
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2012-06-22 13:17:33 +00:00
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for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
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2011-11-02 17:10:40 +00:00
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// DWTELEM * line = slice_buffer_get_line(sb, y);
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IDWTELEM * line = sb->line[y];
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for(x=0; x<w; x++){
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// int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
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int v= line[x] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
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v >>= FRAC_BITS;
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if(v&(~255)) v= ~(v>>31);
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dst8[x + y*ref_stride]= v;
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}
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}
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}else{
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2012-06-22 13:17:33 +00:00
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for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
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2011-11-02 17:10:40 +00:00
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// DWTELEM * line = slice_buffer_get_line(sb, y);
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IDWTELEM * line = sb->line[y];
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for(x=0; x<w; x++){
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line[x] -= 128 << FRAC_BITS;
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// buf[x + y*w]-= 128<<FRAC_BITS;
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}
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}
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}
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return;
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}
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for(mb_x=0; mb_x<=mb_w; mb_x++){
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add_yblock(s, 1, sb, old_buffer, dst8, obmc,
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block_w*mb_x - block_w/2,
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2012-06-22 13:17:33 +00:00
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block_h*mb_y - block_h/2,
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block_w, block_h,
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2011-11-02 17:10:40 +00:00
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w, h,
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w, ref_stride, obmc_stride,
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mb_x - 1, mb_y - 1,
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add, 0, plane_index);
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}
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2015-01-20 00:16:25 +00:00
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if(s->avmv && mb_y < mb_h && plane_index == 0)
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for(mb_x=0; mb_x<mb_w; mb_x++){
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2015-02-20 02:19:02 +00:00
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AVMotionVector *avmv = s->avmv + s->avmv_index;
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2015-01-20 00:16:25 +00:00
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const int b_width = s->b_width << s->block_max_depth;
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const int b_stride= b_width;
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BlockNode *bn= &s->block[mb_x + mb_y*b_stride];
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if (bn->type)
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continue;
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2015-02-20 02:19:02 +00:00
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s->avmv_index++;
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2015-01-20 00:16:25 +00:00
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avmv->w = block_w;
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avmv->h = block_h;
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avmv->dst_x = block_w*mb_x - block_w/2;
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avmv->dst_y = block_h*mb_y - block_h/2;
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2015-11-12 14:03:07 +00:00
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avmv->motion_scale = 8;
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avmv->motion_x = bn->mx * s->mv_scale;
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avmv->motion_y = bn->my * s->mv_scale;
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avmv->src_x = avmv->dst_x + avmv->motion_x / 8;
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avmv->src_y = avmv->dst_y + avmv->motion_y / 8;
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2015-01-20 00:16:25 +00:00
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avmv->source= -1 - bn->ref;
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avmv->flags = 0;
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}
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2011-11-02 17:10:40 +00:00
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}
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static inline void decode_subband_slice_buffered(SnowContext *s, SubBand *b, slice_buffer * sb, int start_y, int h, int save_state[1]){
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const int w= b->width;
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int y;
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const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
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2012-02-15 10:43:58 +00:00
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int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
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2011-11-02 17:10:40 +00:00
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int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
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int new_index = 0;
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if(b->ibuf == s->spatial_idwt_buffer || s->qlog == LOSSLESS_QLOG){
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qadd= 0;
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qmul= 1<<QEXPSHIFT;
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}
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/* If we are on the second or later slice, restore our index. */
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if (start_y != 0)
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new_index = save_state[0];
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for(y=start_y; y<h; y++){
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int x = 0;
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int v;
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IDWTELEM * line = slice_buffer_get_line(sb, y * b->stride_line + b->buf_y_offset) + b->buf_x_offset;
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memset(line, 0, b->width*sizeof(IDWTELEM));
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v = b->x_coeff[new_index].coeff;
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x = b->x_coeff[new_index++].x;
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while(x < w){
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2017-08-27 22:30:33 +00:00
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register int t= (int)( (v>>1)*(unsigned)qmul + qadd)>>QEXPSHIFT;
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2011-11-02 17:10:40 +00:00
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register int u= -(v&1);
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line[x] = (t^u) - u;
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v = b->x_coeff[new_index].coeff;
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x = b->x_coeff[new_index++].x;
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}
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}
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/* Save our variables for the next slice. */
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save_state[0] = new_index;
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return;
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}
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2012-03-02 19:53:00 +00:00
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static int decode_q_branch(SnowContext *s, int level, int x, int y){
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2011-11-02 17:10:40 +00:00
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const int w= s->b_width << s->block_max_depth;
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const int rem_depth= s->block_max_depth - level;
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const int index= (x + y*w) << rem_depth;
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int trx= (x+1)<<rem_depth;
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const BlockNode *left = x ? &s->block[index-1] : &null_block;
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const BlockNode *top = y ? &s->block[index-w] : &null_block;
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const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
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const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
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int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
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2012-03-02 19:53:00 +00:00
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int res;
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2011-11-02 17:10:40 +00:00
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if(s->keyframe){
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set_blocks(s, level, x, y, null_block.color[0], null_block.color[1], null_block.color[2], null_block.mx, null_block.my, null_block.ref, BLOCK_INTRA);
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2012-03-02 19:53:00 +00:00
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return 0;
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2011-11-02 17:10:40 +00:00
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}
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if(level==s->block_max_depth || get_rac(&s->c, &s->block_state[4 + s_context])){
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int type, mx, my;
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int l = left->color[0];
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int cb= left->color[1];
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int cr= left->color[2];
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2015-02-24 02:12:22 +00:00
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unsigned ref = 0;
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2011-11-02 17:10:40 +00:00
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int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
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int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 0*av_log2(2*FFABS(tr->mx - top->mx));
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int my_context= av_log2(2*FFABS(left->my - top->my)) + 0*av_log2(2*FFABS(tr->my - top->my));
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type= get_rac(&s->c, &s->block_state[1 + left->type + top->type]) ? BLOCK_INTRA : 0;
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if(type){
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2017-11-15 20:17:15 +00:00
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int ld, cbd, crd;
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2011-11-02 17:10:40 +00:00
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pred_mv(s, &mx, &my, 0, left, top, tr);
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2017-11-15 20:17:15 +00:00
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ld = get_symbol(&s->c, &s->block_state[32], 1);
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if (ld < -255 || ld > 255) {
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return AVERROR_INVALIDDATA;
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}
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l += ld;
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2013-08-29 20:06:07 +00:00
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if (s->nb_planes > 2) {
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2017-11-15 20:17:15 +00:00
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cbd = get_symbol(&s->c, &s->block_state[64], 1);
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crd = get_symbol(&s->c, &s->block_state[96], 1);
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if (cbd < -255 || cbd > 255 || crd < -255 || crd > 255) {
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return AVERROR_INVALIDDATA;
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}
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cb += cbd;
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cr += crd;
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2013-08-29 20:06:07 +00:00
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}
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2011-11-02 17:10:40 +00:00
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}else{
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if(s->ref_frames > 1)
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ref= get_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], 0);
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2012-03-02 19:53:00 +00:00
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if (ref >= s->ref_frames) {
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av_log(s->avctx, AV_LOG_ERROR, "Invalid ref\n");
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2012-03-02 19:53:00 +00:00
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return AVERROR_INVALIDDATA;
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2012-03-02 19:53:00 +00:00
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}
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2011-11-02 17:10:40 +00:00
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pred_mv(s, &mx, &my, ref, left, top, tr);
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mx+= get_symbol(&s->c, &s->block_state[128 + 32*(mx_context + 16*!!ref)], 1);
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my+= get_symbol(&s->c, &s->block_state[128 + 32*(my_context + 16*!!ref)], 1);
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}
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set_blocks(s, level, x, y, l, cb, cr, mx, my, ref, type);
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}else{
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2012-03-02 19:53:00 +00:00
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if ((res = decode_q_branch(s, level+1, 2*x+0, 2*y+0)) < 0 ||
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(res = decode_q_branch(s, level+1, 2*x+1, 2*y+0)) < 0 ||
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(res = decode_q_branch(s, level+1, 2*x+0, 2*y+1)) < 0 ||
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(res = decode_q_branch(s, level+1, 2*x+1, 2*y+1)) < 0)
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return res;
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2011-11-02 17:10:40 +00:00
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}
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2012-03-02 19:53:00 +00:00
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return 0;
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2011-11-02 17:10:40 +00:00
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}
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static void dequantize_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, IDWTELEM *src, int stride, int start_y, int end_y){
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const int w= b->width;
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const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
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2012-02-15 10:43:58 +00:00
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const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
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2011-11-02 17:10:40 +00:00
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const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
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int x,y;
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if(s->qlog == LOSSLESS_QLOG) return;
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for(y=start_y; y<end_y; y++){
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// DWTELEM * line = slice_buffer_get_line_from_address(sb, src + (y * stride));
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IDWTELEM * line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
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for(x=0; x<w; x++){
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int i= line[x];
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if(i<0){
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2017-06-02 16:13:20 +00:00
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line[x]= -((-i*(unsigned)qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
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2011-11-02 17:10:40 +00:00
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}else if(i>0){
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2017-06-02 16:13:20 +00:00
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line[x]= (( i*(unsigned)qmul + qadd)>>(QEXPSHIFT));
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2011-11-02 17:10:40 +00:00
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}
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}
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}
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}
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static void correlate_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median, int start_y, int end_y){
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const int w= b->width;
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int x,y;
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IDWTELEM * line=0; // silence silly "could be used without having been initialized" warning
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IDWTELEM * prev;
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if (start_y != 0)
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line = slice_buffer_get_line(sb, ((start_y - 1) * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
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for(y=start_y; y<end_y; y++){
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prev = line;
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// line = slice_buffer_get_line_from_address(sb, src + (y * stride));
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line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
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for(x=0; x<w; x++){
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if(x){
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if(use_median){
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if(y && x+1<w) line[x] += mid_pred(line[x - 1], prev[x], prev[x + 1]);
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else line[x] += line[x - 1];
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}else{
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if(y) line[x] += mid_pred(line[x - 1], prev[x], line[x - 1] + prev[x] - prev[x - 1]);
|
|
|
|
else line[x] += line[x - 1];
|
|
|
|
}
|
|
|
|
}else{
|
|
|
|
if(y) line[x] += prev[x];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void decode_qlogs(SnowContext *s){
|
|
|
|
int plane_index, level, orientation;
|
|
|
|
|
2013-08-29 20:06:07 +00:00
|
|
|
for(plane_index=0; plane_index < s->nb_planes; plane_index++){
|
2011-11-02 17:10:40 +00:00
|
|
|
for(level=0; level<s->spatial_decomposition_count; level++){
|
|
|
|
for(orientation=level ? 1:0; orientation<4; orientation++){
|
|
|
|
int q;
|
|
|
|
if (plane_index==2) q= s->plane[1].band[level][orientation].qlog;
|
|
|
|
else if(orientation==2) q= s->plane[plane_index].band[level][1].qlog;
|
|
|
|
else q= get_symbol(&s->c, s->header_state, 1);
|
|
|
|
s->plane[plane_index].band[level][orientation].qlog= q;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#define GET_S(dst, check) \
|
|
|
|
tmp= get_symbol(&s->c, s->header_state, 0);\
|
|
|
|
if(!(check)){\
|
|
|
|
av_log(s->avctx, AV_LOG_ERROR, "Error " #dst " is %d\n", tmp);\
|
2014-03-21 20:01:34 +00:00
|
|
|
return AVERROR_INVALIDDATA;\
|
2011-11-02 17:10:40 +00:00
|
|
|
}\
|
|
|
|
dst= tmp;
|
|
|
|
|
|
|
|
static int decode_header(SnowContext *s){
|
|
|
|
int plane_index, tmp;
|
|
|
|
uint8_t kstate[32];
|
|
|
|
|
|
|
|
memset(kstate, MID_STATE, sizeof(kstate));
|
|
|
|
|
|
|
|
s->keyframe= get_rac(&s->c, kstate);
|
|
|
|
if(s->keyframe || s->always_reset){
|
|
|
|
ff_snow_reset_contexts(s);
|
|
|
|
s->spatial_decomposition_type=
|
|
|
|
s->qlog=
|
|
|
|
s->qbias=
|
|
|
|
s->mv_scale=
|
|
|
|
s->block_max_depth= 0;
|
|
|
|
}
|
|
|
|
if(s->keyframe){
|
|
|
|
GET_S(s->version, tmp <= 0U)
|
|
|
|
s->always_reset= get_rac(&s->c, s->header_state);
|
|
|
|
s->temporal_decomposition_type= get_symbol(&s->c, s->header_state, 0);
|
|
|
|
s->temporal_decomposition_count= get_symbol(&s->c, s->header_state, 0);
|
|
|
|
GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
|
|
|
|
s->colorspace_type= get_symbol(&s->c, s->header_state, 0);
|
2013-08-29 20:06:07 +00:00
|
|
|
if (s->colorspace_type == 1) {
|
|
|
|
s->avctx->pix_fmt= AV_PIX_FMT_GRAY8;
|
|
|
|
s->nb_planes = 1;
|
|
|
|
} else if(s->colorspace_type == 0) {
|
|
|
|
s->chroma_h_shift= get_symbol(&s->c, s->header_state, 0);
|
|
|
|
s->chroma_v_shift= get_symbol(&s->c, s->header_state, 0);
|
|
|
|
|
|
|
|
if(s->chroma_h_shift == 1 && s->chroma_v_shift==1){
|
|
|
|
s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
|
|
|
|
}else if(s->chroma_h_shift == 0 && s->chroma_v_shift==0){
|
|
|
|
s->avctx->pix_fmt= AV_PIX_FMT_YUV444P;
|
|
|
|
}else if(s->chroma_h_shift == 2 && s->chroma_v_shift==2){
|
|
|
|
s->avctx->pix_fmt= AV_PIX_FMT_YUV410P;
|
|
|
|
} else {
|
|
|
|
av_log(s, AV_LOG_ERROR, "unsupported color subsample mode %d %d\n", s->chroma_h_shift, s->chroma_v_shift);
|
|
|
|
s->chroma_h_shift = s->chroma_v_shift = 1;
|
|
|
|
s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
|
|
|
s->nb_planes = 3;
|
2012-06-22 13:17:33 +00:00
|
|
|
} else {
|
2013-08-29 20:06:07 +00:00
|
|
|
av_log(s, AV_LOG_ERROR, "unsupported color space\n");
|
2012-06-22 13:17:33 +00:00
|
|
|
s->chroma_h_shift = s->chroma_v_shift = 1;
|
2012-10-08 18:54:00 +00:00
|
|
|
s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
|
2012-06-22 13:17:33 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
|
|
|
|
2013-08-29 20:06:07 +00:00
|
|
|
|
2011-11-02 17:10:40 +00:00
|
|
|
s->spatial_scalability= get_rac(&s->c, s->header_state);
|
|
|
|
// s->rate_scalability= get_rac(&s->c, s->header_state);
|
|
|
|
GET_S(s->max_ref_frames, tmp < (unsigned)MAX_REF_FRAMES)
|
|
|
|
s->max_ref_frames++;
|
|
|
|
|
|
|
|
decode_qlogs(s);
|
|
|
|
}
|
|
|
|
|
|
|
|
if(!s->keyframe){
|
|
|
|
if(get_rac(&s->c, s->header_state)){
|
2013-08-29 20:06:07 +00:00
|
|
|
for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
|
2011-11-02 17:10:40 +00:00
|
|
|
int htaps, i, sum=0;
|
|
|
|
Plane *p= &s->plane[plane_index];
|
|
|
|
p->diag_mc= get_rac(&s->c, s->header_state);
|
2018-01-15 02:03:36 +00:00
|
|
|
htaps= get_symbol(&s->c, s->header_state, 0);
|
|
|
|
if((unsigned)htaps >= HTAPS_MAX/2 - 1)
|
2014-03-21 20:01:34 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
2018-01-15 02:03:36 +00:00
|
|
|
htaps = htaps*2 + 2;
|
2011-11-02 17:10:40 +00:00
|
|
|
p->htaps= htaps;
|
|
|
|
for(i= htaps/2; i; i--){
|
|
|
|
p->hcoeff[i]= get_symbol(&s->c, s->header_state, 0) * (1-2*(i&1));
|
|
|
|
sum += p->hcoeff[i];
|
|
|
|
}
|
|
|
|
p->hcoeff[0]= 32-sum;
|
|
|
|
}
|
|
|
|
s->plane[2].diag_mc= s->plane[1].diag_mc;
|
|
|
|
s->plane[2].htaps = s->plane[1].htaps;
|
|
|
|
memcpy(s->plane[2].hcoeff, s->plane[1].hcoeff, sizeof(s->plane[1].hcoeff));
|
|
|
|
}
|
|
|
|
if(get_rac(&s->c, s->header_state)){
|
|
|
|
GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
|
|
|
|
decode_qlogs(s);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-11-05 20:20:05 +00:00
|
|
|
s->spatial_decomposition_type+= (unsigned)get_symbol(&s->c, s->header_state, 1);
|
2011-11-02 17:10:40 +00:00
|
|
|
if(s->spatial_decomposition_type > 1U){
|
2012-06-05 10:15:18 +00:00
|
|
|
av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_type %d not supported\n", s->spatial_decomposition_type);
|
2014-03-21 20:01:34 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
2011-11-02 17:10:40 +00:00
|
|
|
}
|
|
|
|
if(FFMIN(s->avctx-> width>>s->chroma_h_shift,
|
2013-03-11 23:28:08 +00:00
|
|
|
s->avctx->height>>s->chroma_v_shift) >> (s->spatial_decomposition_count-1) <= 1){
|
2012-06-05 10:15:18 +00:00
|
|
|
av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_count %d too large for size\n", s->spatial_decomposition_count);
|
2014-03-21 20:01:34 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
2011-11-02 17:10:40 +00:00
|
|
|
}
|
2017-05-09 14:08:14 +00:00
|
|
|
if (s->avctx->width > 65536-4) {
|
|
|
|
av_log(s->avctx, AV_LOG_ERROR, "Width %d is too large\n", s->avctx->width);
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
2011-11-02 17:10:40 +00:00
|
|
|
|
2012-03-09 23:08:32 +00:00
|
|
|
|
2017-11-05 20:20:05 +00:00
|
|
|
s->qlog += (unsigned)get_symbol(&s->c, s->header_state, 1);
|
|
|
|
s->mv_scale += (unsigned)get_symbol(&s->c, s->header_state, 1);
|
|
|
|
s->qbias += (unsigned)get_symbol(&s->c, s->header_state, 1);
|
|
|
|
s->block_max_depth+= (unsigned)get_symbol(&s->c, s->header_state, 1);
|
2017-10-13 01:06:54 +00:00
|
|
|
if(s->block_max_depth > 1 || s->block_max_depth < 0 || s->mv_scale > 256U){
|
2012-06-05 10:15:18 +00:00
|
|
|
av_log(s->avctx, AV_LOG_ERROR, "block_max_depth= %d is too large\n", s->block_max_depth);
|
2011-11-02 17:10:40 +00:00
|
|
|
s->block_max_depth= 0;
|
2017-10-13 01:06:54 +00:00
|
|
|
s->mv_scale = 0;
|
2014-03-21 20:01:34 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
2017-05-05 23:08:54 +00:00
|
|
|
}
|
|
|
|
if (FFABS(s->qbias) > 127) {
|
|
|
|
av_log(s->avctx, AV_LOG_ERROR, "qbias %d is too large\n", s->qbias);
|
|
|
|
s->qbias = 0;
|
|
|
|
return AVERROR_INVALIDDATA;
|
2011-11-02 17:10:40 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static av_cold int decode_init(AVCodecContext *avctx)
|
|
|
|
{
|
2012-07-02 07:39:25 +00:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
if ((ret = ff_snow_common_init(avctx)) < 0) {
|
|
|
|
return ret;
|
|
|
|
}
|
2011-11-02 17:10:40 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-03-02 19:53:00 +00:00
|
|
|
static int decode_blocks(SnowContext *s){
|
2011-11-02 17:10:40 +00:00
|
|
|
int x, y;
|
|
|
|
int w= s->b_width;
|
|
|
|
int h= s->b_height;
|
2012-03-02 19:53:00 +00:00
|
|
|
int res;
|
2011-11-02 17:10:40 +00:00
|
|
|
|
|
|
|
for(y=0; y<h; y++){
|
|
|
|
for(x=0; x<w; x++){
|
2017-11-15 20:17:16 +00:00
|
|
|
if (s->c.bytestream >= s->c.bytestream_end)
|
|
|
|
return AVERROR_INVALIDDATA;
|
2012-03-02 19:53:00 +00:00
|
|
|
if ((res = decode_q_branch(s, 0, x, y)) < 0)
|
|
|
|
return res;
|
2011-11-02 17:10:40 +00:00
|
|
|
}
|
|
|
|
}
|
2012-03-02 19:53:00 +00:00
|
|
|
return 0;
|
2011-11-02 17:10:40 +00:00
|
|
|
}
|
|
|
|
|
2012-11-13 18:35:22 +00:00
|
|
|
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
|
|
|
|
AVPacket *avpkt)
|
|
|
|
{
|
2011-11-02 17:10:40 +00:00
|
|
|
const uint8_t *buf = avpkt->data;
|
|
|
|
int buf_size = avpkt->size;
|
|
|
|
SnowContext *s = avctx->priv_data;
|
|
|
|
RangeCoder * const c= &s->c;
|
|
|
|
int bytes_read;
|
|
|
|
AVFrame *picture = data;
|
|
|
|
int level, orientation, plane_index;
|
2012-03-02 19:53:00 +00:00
|
|
|
int res;
|
2011-11-02 17:10:40 +00:00
|
|
|
|
|
|
|
ff_init_range_decoder(c, buf, buf_size);
|
|
|
|
ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
|
|
|
|
|
2013-03-10 22:43:52 +00:00
|
|
|
s->current_picture->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P
|
2014-03-21 20:02:02 +00:00
|
|
|
if ((res = decode_header(s)) < 0)
|
|
|
|
return res;
|
2012-07-03 22:55:00 +00:00
|
|
|
if ((res=ff_snow_common_init_after_header(avctx)) < 0)
|
|
|
|
return res;
|
2011-11-02 17:10:40 +00:00
|
|
|
|
|
|
|
// realloc slice buffer for the case that spatial_decomposition_count changed
|
|
|
|
ff_slice_buffer_destroy(&s->sb);
|
2012-05-22 11:50:23 +00:00
|
|
|
if ((res = ff_slice_buffer_init(&s->sb, s->plane[0].height,
|
|
|
|
(MB_SIZE >> s->block_max_depth) +
|
2012-08-11 03:32:16 +00:00
|
|
|
s->spatial_decomposition_count * 11 + 1,
|
2012-05-22 11:50:23 +00:00
|
|
|
s->plane[0].width,
|
|
|
|
s->spatial_idwt_buffer)) < 0)
|
|
|
|
return res;
|
2011-11-02 17:10:40 +00:00
|
|
|
|
2013-08-29 20:06:07 +00:00
|
|
|
for(plane_index=0; plane_index < s->nb_planes; plane_index++){
|
2011-11-02 17:10:40 +00:00
|
|
|
Plane *p= &s->plane[plane_index];
|
|
|
|
p->fast_mc= p->diag_mc && p->htaps==6 && p->hcoeff[0]==40
|
|
|
|
&& p->hcoeff[1]==-10
|
|
|
|
&& p->hcoeff[2]==2;
|
|
|
|
}
|
|
|
|
|
|
|
|
ff_snow_alloc_blocks(s);
|
|
|
|
|
2014-03-21 20:02:02 +00:00
|
|
|
if((res = ff_snow_frame_start(s)) < 0)
|
|
|
|
return res;
|
2015-01-20 00:10:37 +00:00
|
|
|
|
|
|
|
s->current_picture->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
|
|
|
|
|
2011-11-02 17:10:40 +00:00
|
|
|
//keyframe flag duplication mess FIXME
|
|
|
|
if(avctx->debug&FF_DEBUG_PICT_INFO)
|
2014-03-21 01:44:54 +00:00
|
|
|
av_log(avctx, AV_LOG_ERROR,
|
2014-03-21 20:04:02 +00:00
|
|
|
"keyframe:%d qlog:%d qbias: %d mvscale: %d "
|
|
|
|
"decomposition_type:%d decomposition_count:%d\n",
|
|
|
|
s->keyframe, s->qlog, s->qbias, s->mv_scale,
|
2014-03-21 01:44:54 +00:00
|
|
|
s->spatial_decomposition_type,
|
|
|
|
s->spatial_decomposition_count
|
|
|
|
);
|
2011-11-02 17:10:40 +00:00
|
|
|
|
2015-01-20 00:16:25 +00:00
|
|
|
av_assert0(!s->avmv);
|
2015-07-27 19:14:31 +00:00
|
|
|
if (s->avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) {
|
2015-01-20 00:16:25 +00:00
|
|
|
s->avmv = av_malloc_array(s->b_width * s->b_height, sizeof(AVMotionVector) << (s->block_max_depth*2));
|
|
|
|
}
|
|
|
|
s->avmv_index = 0;
|
|
|
|
|
2012-03-02 19:53:00 +00:00
|
|
|
if ((res = decode_blocks(s)) < 0)
|
|
|
|
return res;
|
2011-11-02 17:10:40 +00:00
|
|
|
|
2013-08-29 20:06:07 +00:00
|
|
|
for(plane_index=0; plane_index < s->nb_planes; plane_index++){
|
2011-11-02 17:10:40 +00:00
|
|
|
Plane *p= &s->plane[plane_index];
|
|
|
|
int w= p->width;
|
|
|
|
int h= p->height;
|
|
|
|
int x, y;
|
|
|
|
int decode_state[MAX_DECOMPOSITIONS][4][1]; /* Stored state info for unpack_coeffs. 1 variable per instance. */
|
|
|
|
|
|
|
|
if(s->avctx->debug&2048){
|
|
|
|
memset(s->spatial_dwt_buffer, 0, sizeof(DWTELEM)*w*h);
|
|
|
|
predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
|
|
|
|
|
|
|
|
for(y=0; y<h; y++){
|
|
|
|
for(x=0; x<w; x++){
|
2013-03-10 22:43:52 +00:00
|
|
|
int v= s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x];
|
|
|
|
s->mconly_picture->data[plane_index][y*s->mconly_picture->linesize[plane_index] + x]= v;
|
2011-11-02 17:10:40 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
for(level=0; level<s->spatial_decomposition_count; level++){
|
|
|
|
for(orientation=level ? 1 : 0; orientation<4; orientation++){
|
|
|
|
SubBand *b= &p->band[level][orientation];
|
|
|
|
unpack_coeffs(s, b, b->parent, orientation);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
{
|
|
|
|
const int mb_h= s->b_height << s->block_max_depth;
|
|
|
|
const int block_size = MB_SIZE >> s->block_max_depth;
|
2012-06-22 13:17:33 +00:00
|
|
|
const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
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2011-11-02 17:10:40 +00:00
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int mb_y;
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DWTCompose cs[MAX_DECOMPOSITIONS];
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int yd=0, yq=0;
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int y;
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int end_y;
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|
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ff_spatial_idwt_buffered_init(cs, &s->sb, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count);
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for(mb_y=0; mb_y<=mb_h; mb_y++){
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2012-06-22 13:17:33 +00:00
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|
|
int slice_starty = block_h*mb_y;
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int slice_h = block_h*(mb_y+1);
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|
2011-11-02 17:10:40 +00:00
|
|
|
if (!(s->keyframe || s->avctx->debug&512)){
|
2012-06-22 13:17:33 +00:00
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slice_starty = FFMAX(0, slice_starty - (block_h >> 1));
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|
slice_h -= (block_h >> 1);
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2011-11-02 17:10:40 +00:00
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}
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|
for(level=0; level<s->spatial_decomposition_count; level++){
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for(orientation=level ? 1 : 0; orientation<4; orientation++){
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|
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SubBand *b= &p->band[level][orientation];
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|
|
int start_y;
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|
|
|
int end_y;
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|
|
|
int our_mb_start = mb_y;
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|
|
|
int our_mb_end = (mb_y + 1);
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|
|
|
const int extra= 3;
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2012-06-22 13:17:33 +00:00
|
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|
start_y = (mb_y ? ((block_h * our_mb_start) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra: 0);
|
|
|
|
end_y = (((block_h * our_mb_end) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra);
|
2011-11-02 17:10:40 +00:00
|
|
|
if (!(s->keyframe || s->avctx->debug&512)){
|
2012-06-22 13:17:33 +00:00
|
|
|
start_y = FFMAX(0, start_y - (block_h >> (1+s->spatial_decomposition_count - level)));
|
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|
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end_y = FFMAX(0, end_y - (block_h >> (1+s->spatial_decomposition_count - level)));
|
2011-11-02 17:10:40 +00:00
|
|
|
}
|
|
|
|
start_y = FFMIN(b->height, start_y);
|
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|
|
end_y = FFMIN(b->height, end_y);
|
|
|
|
|
|
|
|
if (start_y != end_y){
|
|
|
|
if (orientation == 0){
|
|
|
|
SubBand * correlate_band = &p->band[0][0];
|
|
|
|
int correlate_end_y = FFMIN(b->height, end_y + 1);
|
|
|
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int correlate_start_y = FFMIN(b->height, (start_y ? start_y + 1 : 0));
|
|
|
|
decode_subband_slice_buffered(s, correlate_band, &s->sb, correlate_start_y, correlate_end_y, decode_state[0][0]);
|
|
|
|
correlate_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, 1, 0, correlate_start_y, correlate_end_y);
|
|
|
|
dequantize_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, start_y, end_y);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
decode_subband_slice_buffered(s, b, &s->sb, start_y, end_y, decode_state[level][orientation]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
for(; yd<slice_h; yd+=4){
|
2012-06-14 10:47:55 +00:00
|
|
|
ff_spatial_idwt_buffered_slice(&s->dwt, cs, &s->sb, s->temp_idwt_buffer, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count, yd);
|
2011-11-02 17:10:40 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if(s->qlog == LOSSLESS_QLOG){
|
|
|
|
for(; yq<slice_h && yq<h; yq++){
|
|
|
|
IDWTELEM * line = slice_buffer_get_line(&s->sb, yq);
|
|
|
|
for(x=0; x<w; x++){
|
2017-06-11 12:34:54 +00:00
|
|
|
line[x] *= 1<<FRAC_BITS;
|
2011-11-02 17:10:40 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
predict_slice_buffered(s, &s->sb, s->spatial_idwt_buffer, plane_index, 1, mb_y);
|
|
|
|
|
|
|
|
y = FFMIN(p->height, slice_starty);
|
|
|
|
end_y = FFMIN(p->height, slice_h);
|
|
|
|
while(y < end_y)
|
|
|
|
ff_slice_buffer_release(&s->sb, y++);
|
|
|
|
}
|
|
|
|
|
|
|
|
ff_slice_buffer_flush(&s->sb);
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
emms_c();
|
|
|
|
|
|
|
|
ff_snow_release_buffer(avctx);
|
|
|
|
|
|
|
|
if(!(s->avctx->debug&2048))
|
2013-12-10 23:30:43 +00:00
|
|
|
res = av_frame_ref(picture, s->current_picture);
|
2011-11-02 17:10:40 +00:00
|
|
|
else
|
2013-12-10 23:30:43 +00:00
|
|
|
res = av_frame_ref(picture, s->mconly_picture);
|
2015-01-20 00:16:25 +00:00
|
|
|
if (res >= 0 && s->avmv_index) {
|
|
|
|
AVFrameSideData *sd;
|
|
|
|
|
|
|
|
sd = av_frame_new_side_data(picture, AV_FRAME_DATA_MOTION_VECTORS, s->avmv_index * sizeof(AVMotionVector));
|
|
|
|
if (!sd)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
memcpy(sd->data, s->avmv, s->avmv_index * sizeof(AVMotionVector));
|
|
|
|
}
|
|
|
|
|
|
|
|
av_freep(&s->avmv);
|
2013-12-10 23:30:43 +00:00
|
|
|
|
|
|
|
if (res < 0)
|
|
|
|
return res;
|
2011-11-02 17:10:40 +00:00
|
|
|
|
2012-11-13 18:35:22 +00:00
|
|
|
*got_frame = 1;
|
2011-11-02 17:10:40 +00:00
|
|
|
|
|
|
|
bytes_read= c->bytestream - c->bytestream_start;
|
|
|
|
if(bytes_read ==0) av_log(s->avctx, AV_LOG_ERROR, "error at end of frame\n"); //FIXME
|
|
|
|
|
|
|
|
return bytes_read;
|
|
|
|
}
|
|
|
|
|
|
|
|
static av_cold int decode_end(AVCodecContext *avctx)
|
|
|
|
{
|
|
|
|
SnowContext *s = avctx->priv_data;
|
|
|
|
|
|
|
|
ff_slice_buffer_destroy(&s->sb);
|
|
|
|
|
|
|
|
ff_snow_common_end(s);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
AVCodec ff_snow_decoder = {
|
|
|
|
.name = "snow",
|
2013-10-04 13:33:20 +00:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("Snow"),
|
2011-11-02 17:10:40 +00:00
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
2012-08-05 09:11:04 +00:00
|
|
|
.id = AV_CODEC_ID_SNOW,
|
2011-11-02 17:10:40 +00:00
|
|
|
.priv_data_size = sizeof(SnowContext),
|
|
|
|
.init = decode_init,
|
|
|
|
.close = decode_end,
|
|
|
|
.decode = decode_frame,
|
2015-07-27 20:21:19 +00:00
|
|
|
.capabilities = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/,
|
2015-04-25 02:50:47 +00:00
|
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
|
|
|
|
FF_CODEC_CAP_INIT_CLEANUP,
|
2011-11-02 17:10:40 +00:00
|
|
|
};
|