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FFmpeg/libavcodec/snow.c

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  1. /*

  2.  * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

  6.  * FFmpeg is free software; you can redistribute it and/or

  7.  * modify it under the terms of the GNU Lesser General Public

  8.  * License as published by the Free Software Foundation; either

  9.  * version 2.1 of the License, or (at your option) any later version.

  10.  *

  11.  * FFmpeg is distributed in the hope that it will be useful,

  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  14.  * Lesser General Public License for more details.

  15.  *

  16.  * You should have received a copy of the GNU Lesser General Public

  17.  * License along with FFmpeg; if not, write to the Free Software

  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  19.  */

  20. 

  21. #include "libavutil/intmath.h"

  22. #include "libavutil/log.h"

  23. #include "libavutil/opt.h"

  24. #include "avcodec.h"

  25. #include "dsputil.h"

  26. #include "snow_dwt.h"

  27. #include "internal.h"

  28. #include "snow.h"

  29. #include "snowdata.h"

  30. 

  31. #include "rangecoder.h"

  32. #include "mathops.h"

  33. #include "h263.h"

  34. 

  35. 

  36. void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h,

  37.                               int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8){

  38.     int y, x;

  39.     IDWTELEM * dst;

  40.     for(y=0; y<b_h; y++){

  41.         //FIXME ugly misuse of obmc_stride

  42.         const uint8_t *obmc1= obmc + y*obmc_stride;

  43.         const uint8_t *obmc2= obmc1+ (obmc_stride>>1);

  44.         const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);

  45.         const uint8_t *obmc4= obmc3+ (obmc_stride>>1);

  46.         dst = slice_buffer_get_line(sb, src_y + y);

  47.         for(x=0; x<b_w; x++){

  48.             int v=   obmc1[x] * block[3][x + y*src_stride]

  49.                     +obmc2[x] * block[2][x + y*src_stride]

  50.                     +obmc3[x] * block[1][x + y*src_stride]

  51.                     +obmc4[x] * block[0][x + y*src_stride];

  52. 

  53.             v <<= 8 - LOG2_OBMC_MAX;

  54.             if(FRAC_BITS != 8){

  55.                 v >>= 8 - FRAC_BITS;

  56.             }

  57.             if(add){

  58.                 v += dst[x + src_x];

  59.                 v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS;

  60.                 if(v&(~255)) v= ~(v>>31);

  61.                 dst8[x + y*src_stride] = v;

  62.             }else{

  63.                 dst[x + src_x] -= v;

  64.             }

  65.         }

  66.     }

  67. }

  68. 

  69. void ff_snow_reset_contexts(SnowContext *s){ //FIXME better initial contexts

  70.     int plane_index, level, orientation;

  71. 

  72.     for(plane_index=0; plane_index<3; plane_index++){

  73.         for(level=0; level<MAX_DECOMPOSITIONS; level++){

  74.             for(orientation=level ? 1:0; orientation<4; orientation++){

  75.                 memset(s->plane[plane_index].band[level][orientation].state, MID_STATE, sizeof(s->plane[plane_index].band[level][orientation].state));

  76.             }

  77.         }

  78.     }

  79.     memset(s->header_state, MID_STATE, sizeof(s->header_state));

  80.     memset(s->block_state, MID_STATE, sizeof(s->block_state));

  81. }

  82. 

  83. int ff_snow_alloc_blocks(SnowContext *s){

  84.     int w= -((-s->avctx->width )>>LOG2_MB_SIZE);

  85.     int h= -((-s->avctx->height)>>LOG2_MB_SIZE);

  86. 

  87.     s->b_width = w;

  88.     s->b_height= h;

  89. 

  90.     av_free(s->block);

  91.     s->block= av_mallocz(w * h * sizeof(BlockNode) << (s->block_max_depth*2));

  92.     return 0;

  93. }

  94. 

  95. static void init_qexp(void){

  96.     int i;

  97.     double v=128;

  98. 

  99.     for(i=0; i<QROOT; i++){

  100.         ff_qexp[i]= lrintf(v);

  101.         v *= pow(2, 1.0 / QROOT);

  102.     }

  103. }

  104. static void mc_block(Plane *p, uint8_t *dst, const uint8_t *src, int stride, int b_w, int b_h, int dx, int dy){

  105.     static const uint8_t weight[64]={

  106.     8,7,6,5,4,3,2,1,

  107.     7,7,0,0,0,0,0,1,

  108.     6,0,6,0,0,0,2,0,

  109.     5,0,0,5,0,3,0,0,

  110.     4,0,0,0,4,0,0,0,

  111.     3,0,0,5,0,3,0,0,

  112.     2,0,6,0,0,0,2,0,

  113.     1,7,0,0,0,0,0,1,

  114.     };

  115. 

  116.     static const uint8_t brane[256]={

  117.     0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x11,0x12,0x12,0x12,0x12,0x12,0x12,0x12,

  118.     0x04,0x05,0xcc,0xcc,0xcc,0xcc,0xcc,0x41,0x15,0x16,0xcc,0xcc,0xcc,0xcc,0xcc,0x52,

  119.     0x04,0xcc,0x05,0xcc,0xcc,0xcc,0x41,0xcc,0x15,0xcc,0x16,0xcc,0xcc,0xcc,0x52,0xcc,

  120.     0x04,0xcc,0xcc,0x05,0xcc,0x41,0xcc,0xcc,0x15,0xcc,0xcc,0x16,0xcc,0x52,0xcc,0xcc,

  121.     0x04,0xcc,0xcc,0xcc,0x41,0xcc,0xcc,0xcc,0x15,0xcc,0xcc,0xcc,0x16,0xcc,0xcc,0xcc,

  122.     0x04,0xcc,0xcc,0x41,0xcc,0x05,0xcc,0xcc,0x15,0xcc,0xcc,0x52,0xcc,0x16,0xcc,0xcc,

  123.     0x04,0xcc,0x41,0xcc,0xcc,0xcc,0x05,0xcc,0x15,0xcc,0x52,0xcc,0xcc,0xcc,0x16,0xcc,

  124.     0x04,0x41,0xcc,0xcc,0xcc,0xcc,0xcc,0x05,0x15,0x52,0xcc,0xcc,0xcc,0xcc,0xcc,0x16,

  125.     0x44,0x45,0x45,0x45,0x45,0x45,0x45,0x45,0x55,0x56,0x56,0x56,0x56,0x56,0x56,0x56,

  126.     0x48,0x49,0xcc,0xcc,0xcc,0xcc,0xcc,0x85,0x59,0x5A,0xcc,0xcc,0xcc,0xcc,0xcc,0x96,

  127.     0x48,0xcc,0x49,0xcc,0xcc,0xcc,0x85,0xcc,0x59,0xcc,0x5A,0xcc,0xcc,0xcc,0x96,0xcc,

  128.     0x48,0xcc,0xcc,0x49,0xcc,0x85,0xcc,0xcc,0x59,0xcc,0xcc,0x5A,0xcc,0x96,0xcc,0xcc,

  129.     0x48,0xcc,0xcc,0xcc,0x49,0xcc,0xcc,0xcc,0x59,0xcc,0xcc,0xcc,0x96,0xcc,0xcc,0xcc,

  130.     0x48,0xcc,0xcc,0x85,0xcc,0x49,0xcc,0xcc,0x59,0xcc,0xcc,0x96,0xcc,0x5A,0xcc,0xcc,

  131.     0x48,0xcc,0x85,0xcc,0xcc,0xcc,0x49,0xcc,0x59,0xcc,0x96,0xcc,0xcc,0xcc,0x5A,0xcc,

  132.     0x48,0x85,0xcc,0xcc,0xcc,0xcc,0xcc,0x49,0x59,0x96,0xcc,0xcc,0xcc,0xcc,0xcc,0x5A,

  133.     };

  134. 

  135.     static const uint8_t needs[16]={

  136.     0,1,0,0,

  137.     2,4,2,0,

  138.     0,1,0,0,

  139.     15

  140.     };

  141. 

  142.     int x, y, b, r, l;

  143.     int16_t tmpIt   [64*(32+HTAPS_MAX)];

  144.     uint8_t tmp2t[3][64*(32+HTAPS_MAX)];

  145.     int16_t *tmpI= tmpIt;

  146.     uint8_t *tmp2= tmp2t[0];

  147.     const uint8_t *hpel[11];

  148.     av_assert2(dx<16 && dy<16);

  149.     r= brane[dx + 16*dy]&15;

  150.     l= brane[dx + 16*dy]>>4;

  151. 

  152.     b= needs[l] | needs[r];

  153.     if(p && !p->diag_mc)

  154.         b= 15;

  155. 

  156.     if(b&5){

  157.         for(y=0; y < b_h+HTAPS_MAX-1; y++){

  158.             for(x=0; x < b_w; x++){

  159.                 int a_1=src[x + HTAPS_MAX/2-4];

  160.                 int a0= src[x + HTAPS_MAX/2-3];

  161.                 int a1= src[x + HTAPS_MAX/2-2];

  162.                 int a2= src[x + HTAPS_MAX/2-1];

  163.                 int a3= src[x + HTAPS_MAX/2+0];

  164.                 int a4= src[x + HTAPS_MAX/2+1];

  165.                 int a5= src[x + HTAPS_MAX/2+2];

  166.                 int a6= src[x + HTAPS_MAX/2+3];

  167.                 int am=0;

  168.                 if(!p || p->fast_mc){

  169.                     am= 20*(a2+a3) - 5*(a1+a4) + (a0+a5);

  170.                     tmpI[x]= am;

  171.                     am= (am+16)>>5;

  172.                 }else{

  173.                     am= p->hcoeff[0]*(a2+a3) + p->hcoeff[1]*(a1+a4) + p->hcoeff[2]*(a0+a5) + p->hcoeff[3]*(a_1+a6);

  174.                     tmpI[x]= am;

  175.                     am= (am+32)>>6;

  176.                 }

  177. 

  178.                 if(am&(~255)) am= ~(am>>31);

  179.                 tmp2[x]= am;

  180.             }

  181.             tmpI+= 64;

  182.             tmp2+= 64;

  183.             src += stride;

  184.         }

  185.         src -= stride*y;

  186.     }

  187.     src += HTAPS_MAX/2 - 1;

  188.     tmp2= tmp2t[1];

  189. 

  190.     if(b&2){

  191.         for(y=0; y < b_h; y++){

  192.             for(x=0; x < b_w+1; x++){

  193.                 int a_1=src[x + (HTAPS_MAX/2-4)*stride];

  194.                 int a0= src[x + (HTAPS_MAX/2-3)*stride];

  195.                 int a1= src[x + (HTAPS_MAX/2-2)*stride];

  196.                 int a2= src[x + (HTAPS_MAX/2-1)*stride];

  197.                 int a3= src[x + (HTAPS_MAX/2+0)*stride];

  198.                 int a4= src[x + (HTAPS_MAX/2+1)*stride];

  199.                 int a5= src[x + (HTAPS_MAX/2+2)*stride];

  200.                 int a6= src[x + (HTAPS_MAX/2+3)*stride];

  201.                 int am=0;

  202.                 if(!p || p->fast_mc)

  203.                     am= (20*(a2+a3) - 5*(a1+a4) + (a0+a5) + 16)>>5;

  204.                 else

  205.                     am= (p->hcoeff[0]*(a2+a3) + p->hcoeff[1]*(a1+a4) + p->hcoeff[2]*(a0+a5) + p->hcoeff[3]*(a_1+a6) + 32)>>6;

  206. 

  207.                 if(am&(~255)) am= ~(am>>31);

  208.                 tmp2[x]= am;

  209.             }

  210.             src += stride;

  211.             tmp2+= 64;

  212.         }

  213.         src -= stride*y;

  214.     }

  215.     src += stride*(HTAPS_MAX/2 - 1);

  216.     tmp2= tmp2t[2];

  217.     tmpI= tmpIt;

  218.     if(b&4){

  219.         for(y=0; y < b_h; y++){

  220.             for(x=0; x < b_w; x++){

  221.                 int a_1=tmpI[x + (HTAPS_MAX/2-4)*64];

  222.                 int a0= tmpI[x + (HTAPS_MAX/2-3)*64];

  223.                 int a1= tmpI[x + (HTAPS_MAX/2-2)*64];

  224.                 int a2= tmpI[x + (HTAPS_MAX/2-1)*64];

  225.                 int a3= tmpI[x + (HTAPS_MAX/2+0)*64];

  226.                 int a4= tmpI[x + (HTAPS_MAX/2+1)*64];

  227.                 int a5= tmpI[x + (HTAPS_MAX/2+2)*64];

  228.                 int a6= tmpI[x + (HTAPS_MAX/2+3)*64];

  229.                 int am=0;

  230.                 if(!p || p->fast_mc)

  231.                     am= (20*(a2+a3) - 5*(a1+a4) + (a0+a5) + 512)>>10;

  232.                 else

  233.                     am= (p->hcoeff[0]*(a2+a3) + p->hcoeff[1]*(a1+a4) + p->hcoeff[2]*(a0+a5) + p->hcoeff[3]*(a_1+a6) + 2048)>>12;

  234.                 if(am&(~255)) am= ~(am>>31);

  235.                 tmp2[x]= am;

  236.             }

  237.             tmpI+= 64;

  238.             tmp2+= 64;

  239.         }

  240.     }

  241. 

  242.     hpel[ 0]= src;

  243.     hpel[ 1]= tmp2t[0] + 64*(HTAPS_MAX/2-1);

  244.     hpel[ 2]= src + 1;

  245. 

  246.     hpel[ 4]= tmp2t[1];

  247.     hpel[ 5]= tmp2t[2];

  248.     hpel[ 6]= tmp2t[1] + 1;

  249. 

  250.     hpel[ 8]= src + stride;

  251.     hpel[ 9]= hpel[1] + 64;

  252.     hpel[10]= hpel[8] + 1;

  253. 

  254. #define MC_STRIDE(x) (needs[x] ? 64 : stride)

  255. 

  256.     if(b==15){

  257.         int dxy = dx / 8 + dy / 8 * 4;

  258.         const uint8_t *src1 = hpel[dxy    ];

  259.         const uint8_t *src2 = hpel[dxy + 1];

  260.         const uint8_t *src3 = hpel[dxy + 4];

  261.         const uint8_t *src4 = hpel[dxy + 5];

  262.         int stride1 = MC_STRIDE(dxy);

  263.         int stride2 = MC_STRIDE(dxy + 1);

  264.         int stride3 = MC_STRIDE(dxy + 4);

  265.         int stride4 = MC_STRIDE(dxy + 5);

  266.         dx&=7;

  267.         dy&=7;

  268.         for(y=0; y < b_h; y++){

  269.             for(x=0; x < b_w; x++){

  270.                 dst[x]= ((8-dx)*(8-dy)*src1[x] + dx*(8-dy)*src2[x]+

  271.                          (8-dx)*   dy *src3[x] + dx*   dy *src4[x]+32)>>6;

  272.             }

  273.             src1+=stride1;

  274.             src2+=stride2;

  275.             src3+=stride3;

  276.             src4+=stride4;

  277.             dst +=stride;

  278.         }

  279.     }else{

  280.         const uint8_t *src1= hpel[l];

  281.         const uint8_t *src2= hpel[r];

  282.         int stride1 = MC_STRIDE(l);

  283.         int stride2 = MC_STRIDE(r);

  284.         int a= weight[((dx&7) + (8*(dy&7)))];

  285.         int b= 8-a;

  286.         for(y=0; y < b_h; y++){

  287.             for(x=0; x < b_w; x++){

  288.                 dst[x]= (a*src1[x] + b*src2[x] + 4)>>3;

  289.             }

  290.             src1+=stride1;

  291.             src2+=stride2;

  292.             dst +=stride;

  293.         }

  294.     }

  295. }

  296. 

  297. void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, int stride, int sx, int sy, int b_w, int b_h, BlockNode *block, int plane_index, int w, int h){

  298.     if(block->type & BLOCK_INTRA){

  299.         int x, y;

  300.         const unsigned color  = block->color[plane_index];

  301.         const unsigned color4 = color*0x01010101;

  302.         if(b_w==32){

  303.             for(y=0; y < b_h; y++){

  304.                 *(uint32_t*)&dst[0 + y*stride]= color4;

  305.                 *(uint32_t*)&dst[4 + y*stride]= color4;

  306.                 *(uint32_t*)&dst[8 + y*stride]= color4;

  307.                 *(uint32_t*)&dst[12+ y*stride]= color4;

  308.                 *(uint32_t*)&dst[16+ y*stride]= color4;

  309.                 *(uint32_t*)&dst[20+ y*stride]= color4;

  310.                 *(uint32_t*)&dst[24+ y*stride]= color4;

  311.                 *(uint32_t*)&dst[28+ y*stride]= color4;

  312.             }

  313.         }else if(b_w==16){

  314.             for(y=0; y < b_h; y++){

  315.                 *(uint32_t*)&dst[0 + y*stride]= color4;

  316.                 *(uint32_t*)&dst[4 + y*stride]= color4;

  317.                 *(uint32_t*)&dst[8 + y*stride]= color4;

  318.                 *(uint32_t*)&dst[12+ y*stride]= color4;

  319.             }

  320.         }else if(b_w==8){

  321.             for(y=0; y < b_h; y++){

  322.                 *(uint32_t*)&dst[0 + y*stride]= color4;

  323.                 *(uint32_t*)&dst[4 + y*stride]= color4;

  324.             }

  325.         }else if(b_w==4){

  326.             for(y=0; y < b_h; y++){

  327.                 *(uint32_t*)&dst[0 + y*stride]= color4;

  328.             }

  329.         }else{

  330.             for(y=0; y < b_h; y++){

  331.                 for(x=0; x < b_w; x++){

  332.                     dst[x + y*stride]= color;

  333.                 }

  334.             }

  335.         }

  336.     }else{

  337.         uint8_t *src= s->last_picture[block->ref].data[plane_index];

  338.         const int scale= plane_index ?  (2*s->mv_scale)>>s->chroma_h_shift : 2*s->mv_scale;

  339.         int mx= block->mx*scale;

  340.         int my= block->my*scale;

  341.         const int dx= mx&15;

  342.         const int dy= my&15;

  343.         const int tab_index= 3 - (b_w>>2) + (b_w>>4);

  344.         sx += (mx>>4) - (HTAPS_MAX/2-1);

  345.         sy += (my>>4) - (HTAPS_MAX/2-1);

  346.         src += sx + sy*stride;

  347.         if(   (unsigned)sx >= FFMAX(w - b_w - (HTAPS_MAX-2), 0)

  348.            || (unsigned)sy >= FFMAX(h - b_h - (HTAPS_MAX-2), 0)){

  349.             s->vdsp.emulated_edge_mc(tmp + MB_SIZE, src, stride, b_w+HTAPS_MAX-1, b_h+HTAPS_MAX-1, sx, sy, w, h);

  350.             src= tmp + MB_SIZE;

  351.         }

  352. 

  353.         av_assert2(s->chroma_h_shift == s->chroma_v_shift); // only one mv_scale

  354. 

  355. //        assert(b_w == b_h || 2*b_w == b_h || b_w == 2*b_h);

  356. //        assert(!(b_w&(b_w-1)));

  357.         av_assert2(b_w>1 && b_h>1);

  358.         av_assert2((tab_index>=0 && tab_index<4) || b_w==32);

  359.         if((dx&3) || (dy&3) || !(b_w == b_h || 2*b_w == b_h || b_w == 2*b_h) || (b_w&(b_w-1)) || !s->plane[plane_index].fast_mc )

  360.             mc_block(&s->plane[plane_index], dst, src, stride, b_w, b_h, dx, dy);

  361.         else if(b_w==32){

  362.             int y;

  363.             for(y=0; y<b_h; y+=16){

  364.                 s->h264qpel.put_h264_qpel_pixels_tab[0][dy+(dx>>2)](dst + y*stride, src + 3 + (y+3)*stride,stride);

  365.                 s->h264qpel.put_h264_qpel_pixels_tab[0][dy+(dx>>2)](dst + 16 + y*stride, src + 19 + (y+3)*stride,stride);

  366.             }

  367.         }else if(b_w==b_h)

  368.             s->h264qpel.put_h264_qpel_pixels_tab[tab_index  ][dy+(dx>>2)](dst,src + 3 + 3*stride,stride);

  369.         else if(b_w==2*b_h){

  370.             s->h264qpel.put_h264_qpel_pixels_tab[tab_index+1][dy+(dx>>2)](dst    ,src + 3       + 3*stride,stride);

  371.             s->h264qpel.put_h264_qpel_pixels_tab[tab_index+1][dy+(dx>>2)](dst+b_h,src + 3 + b_h + 3*stride,stride);

  372.         }else{

  373.             av_assert2(2*b_w==b_h);

  374.             s->h264qpel.put_h264_qpel_pixels_tab[tab_index  ][dy+(dx>>2)](dst           ,src + 3 + 3*stride           ,stride);

  375.             s->h264qpel.put_h264_qpel_pixels_tab[tab_index  ][dy+(dx>>2)](dst+b_w*stride,src + 3 + 3*stride+b_w*stride,stride);

  376.         }

  377.     }

  378. }

  379. 

  380. #define mca(dx,dy,b_w)\

  381. static void mc_block_hpel ## dx ## dy ## b_w(uint8_t *dst, const uint8_t *src, ptrdiff_t stride, int h){\

  382.     av_assert2(h==b_w);\

  383.     mc_block(NULL, dst, src-(HTAPS_MAX/2-1)-(HTAPS_MAX/2-1)*stride, stride, b_w, b_w, dx, dy);\

  384. }

  385. 

  386. mca( 0, 0,16)

  387. mca( 8, 0,16)

  388. mca( 0, 8,16)

  389. mca( 8, 8,16)

  390. mca( 0, 0,8)

  391. mca( 8, 0,8)

  392. mca( 0, 8,8)

  393. mca( 8, 8,8)

  394. 

  395. av_cold int ff_snow_common_init(AVCodecContext *avctx){

  396.     SnowContext *s = avctx->priv_data;

  397.     int width, height;

  398.     int i, j;

  399. 

  400.     s->avctx= avctx;

  401.     s->max_ref_frames=1; //just make sure its not an invalid value in case of no initial keyframe

  402. 

  403.     ff_dsputil_init(&s->dsp, avctx);

  404.     ff_videodsp_init(&s->vdsp, 8);

  405.     ff_dwt_init(&s->dwt);

  406.     ff_h264qpel_init(&s->h264qpel, 8);

  407. 

  408. #define mcf(dx,dy)\

  409.     s->dsp.put_qpel_pixels_tab       [0][dy+dx/4]=\

  410.     s->dsp.put_no_rnd_qpel_pixels_tab[0][dy+dx/4]=\

  411.         s->h264qpel.put_h264_qpel_pixels_tab[0][dy+dx/4];\

  412.     s->dsp.put_qpel_pixels_tab       [1][dy+dx/4]=\

  413.     s->dsp.put_no_rnd_qpel_pixels_tab[1][dy+dx/4]=\

  414.         s->h264qpel.put_h264_qpel_pixels_tab[1][dy+dx/4];

  415. 

  416.     mcf( 0, 0)

  417.     mcf( 4, 0)

  418.     mcf( 8, 0)

  419.     mcf(12, 0)

  420.     mcf( 0, 4)

  421.     mcf( 4, 4)

  422.     mcf( 8, 4)

  423.     mcf(12, 4)

  424.     mcf( 0, 8)

  425.     mcf( 4, 8)

  426.     mcf( 8, 8)

  427.     mcf(12, 8)

  428.     mcf( 0,12)

  429.     mcf( 4,12)

  430.     mcf( 8,12)

  431.     mcf(12,12)

  432. 

  433. #define mcfh(dx,dy)\

  434.     s->dsp.put_pixels_tab       [0][dy/4+dx/8]=\

  435.     s->dsp.put_no_rnd_pixels_tab[0][dy/4+dx/8]=\

  436.         mc_block_hpel ## dx ## dy ## 16;\

  437.     s->dsp.put_pixels_tab       [1][dy/4+dx/8]=\

  438.     s->dsp.put_no_rnd_pixels_tab[1][dy/4+dx/8]=\

  439.         mc_block_hpel ## dx ## dy ## 8;

  440. 

  441.     mcfh(0, 0)

  442.     mcfh(8, 0)

  443.     mcfh(0, 8)

  444.     mcfh(8, 8)

  445. 

  446.     init_qexp();

  447. 

  448. //    dec += FFMAX(s->chroma_h_shift, s->chroma_v_shift);

  449. 

  450.     width= s->avctx->width;

  451.     height= s->avctx->height;

  452. 

  453.     FF_ALLOCZ_OR_GOTO(avctx, s->spatial_idwt_buffer, width * height * sizeof(IDWTELEM), fail);

  454.     FF_ALLOCZ_OR_GOTO(avctx, s->spatial_dwt_buffer,  width * height * sizeof(DWTELEM),  fail); //FIXME this does not belong here

  455.     FF_ALLOCZ_OR_GOTO(avctx, s->temp_dwt_buffer,     width * sizeof(DWTELEM),  fail);

  456.     FF_ALLOCZ_OR_GOTO(avctx, s->temp_idwt_buffer,    width * sizeof(IDWTELEM), fail);

  457.     FF_ALLOC_OR_GOTO(avctx,  s->run_buffer,          ((width + 1) >> 1) * ((height + 1) >> 1) * sizeof(*s->run_buffer), fail);

  458. 

  459.     for(i=0; i<MAX_REF_FRAMES; i++)

  460.         for(j=0; j<MAX_REF_FRAMES; j++)

  461.             ff_scale_mv_ref[i][j] = 256*(i+1)/(j+1);

  462. 

  463.     return 0;

  464. fail:

  465.     return AVERROR(ENOMEM);

  466. }

  467. 

  468. int ff_snow_common_init_after_header(AVCodecContext *avctx) {

  469.     SnowContext *s = avctx->priv_data;

  470.     int plane_index, level, orientation;

  471.     int ret, emu_buf_size;

  472. 

  473.     if(!s->scratchbuf) {

  474.         if ((ret = ff_get_buffer(s->avctx, &s->mconly_picture)) < 0) {

  475.             av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  476.             return ret;

  477.         }

  478.         FF_ALLOCZ_OR_GOTO(avctx, s->scratchbuf, FFMAX(s->mconly_picture.linesize[0], 2*avctx->width+256)*7*MB_SIZE, fail);

  479.         emu_buf_size = FFMAX(s->mconly_picture.linesize[0], 2*avctx->width+256) * (2 * MB_SIZE + HTAPS_MAX - 1);

  480.         FF_ALLOC_OR_GOTO(avctx, s->emu_edge_buffer, emu_buf_size, fail);

  481.     }

  482. 

  483.     if(s->mconly_picture.format != avctx->pix_fmt) {

  484.         av_log(avctx, AV_LOG_ERROR, "pixel format changed\n");

  485.         return AVERROR_INVALIDDATA;

  486.     }

  487. 

  488.     for(plane_index=0; plane_index<3; plane_index++){

  489.         int w= s->avctx->width;

  490.         int h= s->avctx->height;

  491. 

  492.         if(plane_index){

  493.             w>>= s->chroma_h_shift;

  494.             h>>= s->chroma_v_shift;

  495.         }

  496.         s->plane[plane_index].width = w;

  497.         s->plane[plane_index].height= h;

  498. 

  499.         for(level=s->spatial_decomposition_count-1; level>=0; level--){

  500.             for(orientation=level ? 1 : 0; orientation<4; orientation++){

  501.                 SubBand *b= &s->plane[plane_index].band[level][orientation];

  502. 

  503.                 b->buf= s->spatial_dwt_buffer;

  504.                 b->level= level;

  505.                 b->stride= s->plane[plane_index].width << (s->spatial_decomposition_count - level);

  506.                 b->width = (w + !(orientation&1))>>1;

  507.                 b->height= (h + !(orientation>1))>>1;

  508. 

  509.                 b->stride_line = 1 << (s->spatial_decomposition_count - level);

  510.                 b->buf_x_offset = 0;

  511.                 b->buf_y_offset = 0;

  512. 

  513.                 if(orientation&1){

  514.                     b->buf += (w+1)>>1;

  515.                     b->buf_x_offset = (w+1)>>1;

  516.                 }

  517.                 if(orientation>1){

  518.                     b->buf += b->stride>>1;

  519.                     b->buf_y_offset = b->stride_line >> 1;

  520.                 }

  521.                 b->ibuf= s->spatial_idwt_buffer + (b->buf - s->spatial_dwt_buffer);

  522. 

  523.                 if(level)

  524.                     b->parent= &s->plane[plane_index].band[level-1][orientation];

  525.                 //FIXME avoid this realloc

  526.                 av_freep(&b->x_coeff);

  527.                 b->x_coeff=av_mallocz(((b->width+1) * b->height+1)*sizeof(x_and_coeff));

  528.             }

  529.             w= (w+1)>>1;

  530.             h= (h+1)>>1;

  531.         }

  532.     }

  533. 

  534.     return 0;

  535. fail:

  536.     return AVERROR(ENOMEM);

  537. }

  538. 

  539. #define USE_HALFPEL_PLANE 0

  540. 

  541. static void halfpel_interpol(SnowContext *s, uint8_t *halfpel[4][4], AVFrame *frame){

  542.     int p,x,y;

  543. 

  544.     for(p=0; p<3; p++){

  545.         int is_chroma= !!p;

  546.         int w= is_chroma ? s->avctx->width >>s->chroma_h_shift : s->avctx->width;

  547.         int h= is_chroma ? s->avctx->height>>s->chroma_v_shift : s->avctx->height;

  548.         int ls= frame->linesize[p];

  549.         uint8_t *src= frame->data[p];

  550. 

  551.         halfpel[1][p] = (uint8_t*) av_malloc(ls * (h + 2 * EDGE_WIDTH)) + EDGE_WIDTH * (1 + ls);

  552.         halfpel[2][p] = (uint8_t*) av_malloc(ls * (h + 2 * EDGE_WIDTH)) + EDGE_WIDTH * (1 + ls);

  553.         halfpel[3][p] = (uint8_t*) av_malloc(ls * (h + 2 * EDGE_WIDTH)) + EDGE_WIDTH * (1 + ls);

  554. 

  555.         halfpel[0][p]= src;

  556.         for(y=0; y<h; y++){

  557.             for(x=0; x<w; x++){

  558.                 int i= y*ls + x;

  559. 

  560.                 halfpel[1][p][i]= (20*(src[i] + src[i+1]) - 5*(src[i-1] + src[i+2]) + (src[i-2] + src[i+3]) + 16 )>>5;

  561.             }

  562.         }

  563.         for(y=0; y<h; y++){

  564.             for(x=0; x<w; x++){

  565.                 int i= y*ls + x;

  566. 

  567.                 halfpel[2][p][i]= (20*(src[i] + src[i+ls]) - 5*(src[i-ls] + src[i+2*ls]) + (src[i-2*ls] + src[i+3*ls]) + 16 )>>5;

  568.             }

  569.         }

  570.         src= halfpel[1][p];

  571.         for(y=0; y<h; y++){

  572.             for(x=0; x<w; x++){

  573.                 int i= y*ls + x;

  574. 

  575.                 halfpel[3][p][i]= (20*(src[i] + src[i+ls]) - 5*(src[i-ls] + src[i+2*ls]) + (src[i-2*ls] + src[i+3*ls]) + 16 )>>5;

  576.             }

  577.         }

  578. 

  579. //FIXME border!

  580.     }

  581. }

  582. 

  583. void ff_snow_release_buffer(AVCodecContext *avctx)

  584. {

  585.     SnowContext *s = avctx->priv_data;

  586.     int i;

  587. 

  588.     if(s->last_picture[s->max_ref_frames-1].data[0]){

  589.         avctx->release_buffer(avctx, &s->last_picture[s->max_ref_frames-1]);

  590.         for(i=0; i<9; i++)

  591.             if(s->halfpel_plane[s->max_ref_frames-1][1+i/3][i%3])

  592.                 av_free(s->halfpel_plane[s->max_ref_frames-1][1+i/3][i%3] - EDGE_WIDTH*(1+s->current_picture.linesize[i%3]));

  593.     }

  594. }

  595. 

  596. int ff_snow_frame_start(SnowContext *s){

  597.    AVFrame tmp;

  598.    int w= s->avctx->width; //FIXME round up to x16 ?

  599.    int h= s->avctx->height;

  600. 

  601.     if (s->current_picture.data[0] && !(s->avctx->flags&CODEC_FLAG_EMU_EDGE)) {

  602.         s->dsp.draw_edges(s->current_picture.data[0],

  603.                           s->current_picture.linesize[0], w   , h   ,

  604.                           EDGE_WIDTH  , EDGE_WIDTH  , EDGE_TOP | EDGE_BOTTOM);

  605.         s->dsp.draw_edges(s->current_picture.data[1],

  606.                           s->current_picture.linesize[1], w>>s->chroma_h_shift, h>>s->chroma_v_shift,

  607.                           EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);

  608.         s->dsp.draw_edges(s->current_picture.data[2],

  609.                           s->current_picture.linesize[2], w>>s->chroma_h_shift, h>>s->chroma_v_shift,

  610.                           EDGE_WIDTH>>s->chroma_h_shift, EDGE_WIDTH>>s->chroma_v_shift, EDGE_TOP | EDGE_BOTTOM);

  611.     }

  612. 

  613.     ff_snow_release_buffer(s->avctx);

  614. 

  615.     tmp= s->last_picture[s->max_ref_frames-1];

  616.     memmove(s->last_picture+1, s->last_picture, (s->max_ref_frames-1)*sizeof(AVFrame));

  617.     memmove(s->halfpel_plane+1, s->halfpel_plane, (s->max_ref_frames-1)*sizeof(void*)*4*4);

  618.     if(USE_HALFPEL_PLANE && s->current_picture.data[0])

  619.         halfpel_interpol(s, s->halfpel_plane[0], &s->current_picture);

  620.     s->last_picture[0]= s->current_picture;

  621.     s->current_picture= tmp;

  622. 

  623.     if(s->keyframe){

  624.         s->ref_frames= 0;

  625.     }else{

  626.         int i;

  627.         for(i=0; i<s->max_ref_frames && s->last_picture[i].data[0]; i++)

  628.             if(i && s->last_picture[i-1].key_frame)

  629.                 break;

  630.         s->ref_frames= i;

  631.         if(s->ref_frames==0){

  632.             av_log(s->avctx,AV_LOG_ERROR, "No reference frames\n");

  633.             return -1;

  634.         }

  635.     }

  636. 

  637.     s->current_picture.reference= 3;

  638.     if(ff_get_buffer(s->avctx, &s->current_picture) < 0){

  639.         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  640.         return -1;

  641.     }

  642. 

  643.     s->current_picture.key_frame= s->keyframe;

  644. 

  645.     return 0;

  646. }

  647. 

  648. av_cold void ff_snow_common_end(SnowContext *s)

  649. {

  650.     int plane_index, level, orientation, i;

  651. 

  652.     av_freep(&s->spatial_dwt_buffer);

  653.     av_freep(&s->temp_dwt_buffer);

  654.     av_freep(&s->spatial_idwt_buffer);

  655.     av_freep(&s->temp_idwt_buffer);

  656.     av_freep(&s->run_buffer);

  657. 

  658.     s->m.me.temp= NULL;

  659.     av_freep(&s->m.me.scratchpad);

  660.     av_freep(&s->m.me.map);

  661.     av_freep(&s->m.me.score_map);

  662.     av_freep(&s->m.obmc_scratchpad);

  663. 

  664.     av_freep(&s->block);

  665.     av_freep(&s->scratchbuf);

  666.     av_freep(&s->emu_edge_buffer);

  667. 

  668.     for(i=0; i<MAX_REF_FRAMES; i++){

  669.         av_freep(&s->ref_mvs[i]);

  670.         av_freep(&s->ref_scores[i]);

  671.         if(s->last_picture[i].data[0]) {

  672.             av_assert0(s->last_picture[i].data[0] != s->current_picture.data[0]);

  673.             s->avctx->release_buffer(s->avctx, &s->last_picture[i]);

  674.         }

  675.     }

  676. 

  677.     for(plane_index=0; plane_index<3; plane_index++){

  678.         for(level=s->spatial_decomposition_count-1; level>=0; level--){

  679.             for(orientation=level ? 1 : 0; orientation<4; orientation++){

  680.                 SubBand *b= &s->plane[plane_index].band[level][orientation];

  681. 

  682.                 av_freep(&b->x_coeff);

  683.             }

  684.         }

  685.     }

  686.     if (s->mconly_picture.data[0])

  687.         s->avctx->release_buffer(s->avctx, &s->mconly_picture);

  688.     if (s->current_picture.data[0])

  689.         s->avctx->release_buffer(s->avctx, &s->current_picture);

  690. }