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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. int ff_snow_get_buffer(SnowContext *s, AVFrame *frame)

  70. {

  71.     int ret, i;

  72. 

  73.     frame->width  = s->avctx->width  + 2 * EDGE_WIDTH;

  74.     frame->height = s->avctx->height + 2 * EDGE_WIDTH;

  75.     if ((ret = ff_get_buffer(s->avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)

  76.         return ret;

  77.     for (i = 0; frame->data[i]; i++) {

  78.         int offset = (EDGE_WIDTH >> (i ? s->chroma_v_shift : 0)) *

  79.                         frame->linesize[i] +

  80.                         (EDGE_WIDTH >> (i ? s->chroma_h_shift : 0));

  81.         frame->data[i] += offset;

  82.     }

  83.     frame->width  = s->avctx->width;

  84.     frame->height = s->avctx->height;

  85. 

  86.     return 0;

  87. }

  88. 

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

  90.     int plane_index, level, orientation;

  91. 

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

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

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

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

  96.             }

  97.         }

  98.     }

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

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

  101. }

  102. 

  103. int ff_snow_alloc_blocks(SnowContext *s){

  104.     int w= FF_CEIL_RSHIFT(s->avctx->width,  LOG2_MB_SIZE);

  105.     int h= FF_CEIL_RSHIFT(s->avctx->height, LOG2_MB_SIZE);

  106. 

  107.     s->b_width = w;

  108.     s->b_height= h;

  109. 

  110.     av_free(s->block);

  111.     s->block= av_mallocz_array(w * h,  sizeof(BlockNode) << (s->block_max_depth*2));

  112.     if (!s->block)

  113.         return AVERROR(ENOMEM);

  114. 

  115.     return 0;

  116. }

  117. 

  118. static av_cold void init_qexp(void){

  119.     int i;

  120.     double v=128;

  121. 

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

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

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

  125.     }

  126. }

  127. 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){

  128.     static const uint8_t weight[64]={

  129.     8,7,6,5,4,3,2,1,

  130.     7,7,0,0,0,0,0,1,

  131.     6,0,6,0,0,0,2,0,

  132.     5,0,0,5,0,3,0,0,

  133.     4,0,0,0,4,0,0,0,

  134.     3,0,0,5,0,3,0,0,

  135.     2,0,6,0,0,0,2,0,

  136.     1,7,0,0,0,0,0,1,

  137.     };

  138. 

  139.     static const uint8_t brane[256]={

  140.     0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x11,0x12,0x12,0x12,0x12,0x12,0x12,0x12,

  141.     0x04,0x05,0xcc,0xcc,0xcc,0xcc,0xcc,0x41,0x15,0x16,0xcc,0xcc,0xcc,0xcc,0xcc,0x52,

  142.     0x04,0xcc,0x05,0xcc,0xcc,0xcc,0x41,0xcc,0x15,0xcc,0x16,0xcc,0xcc,0xcc,0x52,0xcc,

  143.     0x04,0xcc,0xcc,0x05,0xcc,0x41,0xcc,0xcc,0x15,0xcc,0xcc,0x16,0xcc,0x52,0xcc,0xcc,

  144.     0x04,0xcc,0xcc,0xcc,0x41,0xcc,0xcc,0xcc,0x15,0xcc,0xcc,0xcc,0x16,0xcc,0xcc,0xcc,

  145.     0x04,0xcc,0xcc,0x41,0xcc,0x05,0xcc,0xcc,0x15,0xcc,0xcc,0x52,0xcc,0x16,0xcc,0xcc,

  146.     0x04,0xcc,0x41,0xcc,0xcc,0xcc,0x05,0xcc,0x15,0xcc,0x52,0xcc,0xcc,0xcc,0x16,0xcc,

  147.     0x04,0x41,0xcc,0xcc,0xcc,0xcc,0xcc,0x05,0x15,0x52,0xcc,0xcc,0xcc,0xcc,0xcc,0x16,

  148.     0x44,0x45,0x45,0x45,0x45,0x45,0x45,0x45,0x55,0x56,0x56,0x56,0x56,0x56,0x56,0x56,

  149.     0x48,0x49,0xcc,0xcc,0xcc,0xcc,0xcc,0x85,0x59,0x5A,0xcc,0xcc,0xcc,0xcc,0xcc,0x96,

  150.     0x48,0xcc,0x49,0xcc,0xcc,0xcc,0x85,0xcc,0x59,0xcc,0x5A,0xcc,0xcc,0xcc,0x96,0xcc,

  151.     0x48,0xcc,0xcc,0x49,0xcc,0x85,0xcc,0xcc,0x59,0xcc,0xcc,0x5A,0xcc,0x96,0xcc,0xcc,

  152.     0x48,0xcc,0xcc,0xcc,0x49,0xcc,0xcc,0xcc,0x59,0xcc,0xcc,0xcc,0x96,0xcc,0xcc,0xcc,

  153.     0x48,0xcc,0xcc,0x85,0xcc,0x49,0xcc,0xcc,0x59,0xcc,0xcc,0x96,0xcc,0x5A,0xcc,0xcc,

  154.     0x48,0xcc,0x85,0xcc,0xcc,0xcc,0x49,0xcc,0x59,0xcc,0x96,0xcc,0xcc,0xcc,0x5A,0xcc,

  155.     0x48,0x85,0xcc,0xcc,0xcc,0xcc,0xcc,0x49,0x59,0x96,0xcc,0xcc,0xcc,0xcc,0xcc,0x5A,

  156.     };

  157. 

  158.     static const uint8_t needs[16]={

  159.     0,1,0,0,

  160.     2,4,2,0,

  161.     0,1,0,0,

  162.     15

  163.     };

  164. 

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

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

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

  168.     int16_t *tmpI= tmpIt;

  169.     uint8_t *tmp2= tmp2t[0];

  170.     const uint8_t *hpel[11];

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

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

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

  174. 

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

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

  177.         b= 15;

  178. 

  179.     if(b&5){

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

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

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

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

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

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

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

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

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

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

  190.                 int am=0;

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

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

  193.                     tmpI[x]= am;

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

  195.                 }else{

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

  197.                     tmpI[x]= am;

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

  199.                 }

  200. 

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

  202.                 tmp2[x]= am;

  203.             }

  204.             tmpI+= 64;

  205.             tmp2+= 64;

  206.             src += stride;

  207.         }

  208.         src -= stride*y;

  209.     }

  210.     src += HTAPS_MAX/2 - 1;

  211.     tmp2= tmp2t[1];

  212. 

  213.     if(b&2){

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

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

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

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

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

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

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

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

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

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

  224.                 int am=0;

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

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

  227.                 else

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

  229. 

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

  231.                 tmp2[x]= am;

  232.             }

  233.             src += stride;

  234.             tmp2+= 64;

  235.         }

  236.         src -= stride*y;

  237.     }

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

  239.     tmp2= tmp2t[2];

  240.     tmpI= tmpIt;

  241.     if(b&4){

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

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

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

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

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

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

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

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

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

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

  252.                 int am=0;

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

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

  255.                 else

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

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

  258.                 tmp2[x]= am;

  259.             }

  260.             tmpI+= 64;

  261.             tmp2+= 64;

  262.         }

  263.     }

  264. 

  265.     hpel[ 0]= src;

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

  267.     hpel[ 2]= src + 1;

  268. 

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

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

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

  272. 

  273.     hpel[ 8]= src + stride;

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

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

  276. 

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

  278. 

  279.     if(b==15){

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

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

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

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

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

  285.         int stride1 = MC_STRIDE(dxy);

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

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

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

  289.         dx&=7;

  290.         dy&=7;

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

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

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

  294.                          (8-dx)*   dy *src3[x] + dx*   dy *src4[x]+32)>>6;

  295.             }

  296.             src1+=stride1;

  297.             src2+=stride2;

  298.             src3+=stride3;

  299.             src4+=stride4;

  300.             dst +=stride;

  301.         }

  302.     }else{

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

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

  305.         int stride1 = MC_STRIDE(l);

  306.         int stride2 = MC_STRIDE(r);

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

  308.         int b= 8-a;

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

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

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

  312.             }

  313.             src1+=stride1;

  314.             src2+=stride2;

  315.             dst +=stride;

  316.         }

  317.     }

  318. }

  319. 

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

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

  322.         int x, y;

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

  324.         const unsigned color4 = color*0x01010101;

  325.         if(b_w==32){

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

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

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

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

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

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

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

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

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

  335.             }

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

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

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

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

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

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

  342.             }

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

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

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

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

  347.             }

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

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

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

  351.             }

  352.         }else{

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

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

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

  356.                 }

  357.             }

  358.         }

  359.     }else{

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

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

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

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

  364.         const int dx= mx&15;

  365.         const int dy= my&15;

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

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

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

  369.         src += sx + sy*stride;

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

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

  372.             s->vdsp.emulated_edge_mc(tmp + MB_SIZE, src,

  373.                                      stride, stride,

  374.                                      b_w+HTAPS_MAX-1, b_h+HTAPS_MAX-1,

  375.                                      sx, sy, w, h);

  376.             src= tmp + MB_SIZE;

  377.         }

  378. 

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

  380. 

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

  382.         if(    (dx&3) || (dy&3)

  383.             || !(b_w == b_h || 2*b_w == b_h || b_w == 2*b_h)

  384.             || (b_w&(b_w-1))

  385.             || b_w == 1

  386.             || b_h == 1

  387.             || !s->plane[plane_index].fast_mc )

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

  389.         else if(b_w==32){

  390.             int y;

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

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

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

  394.             }

  395.         }else if(b_w==b_h)

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

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

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

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

  400.         }else{

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

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

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

  404.         }

  405.     }

  406. }

  407. 

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

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

  410.     av_assert2(h==b_w);\

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

  412. }

  413. 

  414. mca( 0, 0,16)

  415. mca( 8, 0,16)

  416. mca( 0, 8,16)

  417. mca( 8, 8,16)

  418. mca( 0, 0,8)

  419. mca( 8, 0,8)

  420. mca( 0, 8,8)

  421. mca( 8, 8,8)

  422. 

  423. av_cold int ff_snow_common_init(AVCodecContext *avctx){

  424.     SnowContext *s = avctx->priv_data;

  425.     int width, height;

  426.     int i, j;

  427. 

  428.     s->avctx= avctx;

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

  430. 

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

  432.     ff_hpeldsp_init(&s->hdsp, avctx->flags);

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

  434.     ff_dwt_init(&s->dwt);

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

  436. 

  437. #define mcf(dx,dy)\

  438.     s->qdsp.put_qpel_pixels_tab       [0][dy+dx/4]=\

  439.     s->qdsp.put_no_rnd_qpel_pixels_tab[0][dy+dx/4]=\

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

  441.     s->qdsp.put_qpel_pixels_tab       [1][dy+dx/4]=\

  442.     s->qdsp.put_no_rnd_qpel_pixels_tab[1][dy+dx/4]=\

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

  444. 

  445.     mcf( 0, 0)

  446.     mcf( 4, 0)

  447.     mcf( 8, 0)

  448.     mcf(12, 0)

  449.     mcf( 0, 4)

  450.     mcf( 4, 4)

  451.     mcf( 8, 4)

  452.     mcf(12, 4)

  453.     mcf( 0, 8)

  454.     mcf( 4, 8)

  455.     mcf( 8, 8)

  456.     mcf(12, 8)

  457.     mcf( 0,12)

  458.     mcf( 4,12)

  459.     mcf( 8,12)

  460.     mcf(12,12)

  461. 

  462. #define mcfh(dx,dy)\

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

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

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

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

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

  468.         mc_block_hpel ## dx ## dy ## 8;

  469. 

  470.     mcfh(0, 0)

  471.     mcfh(8, 0)

  472.     mcfh(0, 8)

  473.     mcfh(8, 8)

  474. 

  475.     init_qexp();

  476. 

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

  478. 

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

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

  481. 

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

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

  484.     FF_ALLOCZ_ARRAY_OR_GOTO(avctx, s->temp_dwt_buffer,     width, sizeof(DWTELEM),  fail);

  485.     FF_ALLOCZ_ARRAY_OR_GOTO(avctx, s->temp_idwt_buffer,    width, sizeof(IDWTELEM), fail);

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

  487. 

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

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

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

  491.         s->last_picture[i] = av_frame_alloc();

  492.         if (!s->last_picture[i])

  493.             goto fail;

  494.     }

  495. 

  496.     s->mconly_picture = av_frame_alloc();

  497.     s->current_picture = av_frame_alloc();

  498.     if (!s->mconly_picture || !s->current_picture)

  499.         goto fail;

  500. 

  501.     return 0;

  502. fail:

  503.     return AVERROR(ENOMEM);

  504. }

  505. 

  506. int ff_snow_common_init_after_header(AVCodecContext *avctx) {

  507.     SnowContext *s = avctx->priv_data;

  508.     int plane_index, level, orientation;

  509.     int ret, emu_buf_size;

  510. 

  511.     if(!s->scratchbuf) {

  512.         if ((ret = ff_get_buffer(s->avctx, s->mconly_picture,

  513.                                  AV_GET_BUFFER_FLAG_REF)) < 0)

  514.             return ret;

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

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

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

  518.     }

  519. 

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

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

  522.         return AVERROR_INVALIDDATA;

  523.     }

  524. 

  525.     for(plane_index=0; plane_index < s->nb_planes; plane_index++){

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

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

  528. 

  529.         if(plane_index){

  530.             w>>= s->chroma_h_shift;

  531.             h>>= s->chroma_v_shift;

  532.         }

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

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

  535. 

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

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

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

  539. 

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

  541.                 b->level= level;

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

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

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

  545. 

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

  547.                 b->buf_x_offset = 0;

  548.                 b->buf_y_offset = 0;

  549. 

  550.                 if(orientation&1){

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

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

  553.                 }

  554.                 if(orientation>1){

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

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

  557.                 }

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

  559. 

  560.                 if(level)

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

  562.                 //FIXME avoid this realloc

  563.                 av_freep(&b->x_coeff);

  564.                 b->x_coeff=av_mallocz_array(((b->width+1) * b->height+1), sizeof(x_and_coeff));

  565.                 if (!b->x_coeff)

  566.                     goto fail;

  567.             }

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

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

  570.         }

  571.     }

  572. 

  573.     return 0;

  574. fail:

  575.     return AVERROR(ENOMEM);

  576. }

  577. 

  578. #define USE_HALFPEL_PLANE 0

  579. 

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

  581.     int p,x,y;

  582. 

  583.     for(p=0; p < s->nb_planes; p++){

  584.         int is_chroma= !!p;

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

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

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

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

  589. 

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

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

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

  593.         if (!halfpel[1][p] || !halfpel[2][p] || !halfpel[3][p])

  594.             return AVERROR(ENOMEM);

  595. 

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

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

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

  599.                 int i= y*ls + x;

  600. 

  601.                 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;

  602.             }

  603.         }

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

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

  606.                 int i= y*ls + x;

  607. 

  608.                 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;

  609.             }

  610.         }

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

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

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

  614.                 int i= y*ls + x;

  615. 

  616.                 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;

  617.             }

  618.         }

  619. 

  620. //FIXME border!

  621.     }

  622.     return 0;

  623. }

  624. 

  625. void ff_snow_release_buffer(AVCodecContext *avctx)

  626. {

  627.     SnowContext *s = avctx->priv_data;

  628.     int i;

  629. 

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

  631.         av_frame_unref(s->last_picture[s->max_ref_frames-1]);

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

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

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

  635.     }

  636. }

  637. 

  638. int ff_snow_frame_start(SnowContext *s){

  639.    AVFrame *tmp;

  640.    int i, ret;

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

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

  643. 

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

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

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

  647.                           EDGE_WIDTH  , EDGE_WIDTH  , EDGE_TOP | EDGE_BOTTOM);

  648.         if (s->current_picture->data[2]) {

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

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

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

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

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

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

  655.         }

  656.     }

  657. 

  658.     ff_snow_release_buffer(s->avctx);

  659. 

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

  661.     for(i=s->max_ref_frames-1; i>0; i--)

  662.         s->last_picture[i] = s->last_picture[i-1];

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

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

  665.         if((ret = halfpel_interpol(s, s->halfpel_plane[0], s->current_picture)) < 0)

  666.             return ret;

  667.     }

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

  669.     s->current_picture = tmp;

  670. 

  671.     if(s->keyframe){

  672.         s->ref_frames= 0;

  673.     }else{

  674.         int i;

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

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

  677.                 break;

  678.         s->ref_frames= i;

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

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

  681.             return -1;

  682.         }

  683.     }

  684.     if ((ret = ff_snow_get_buffer(s, s->current_picture)) < 0)

  685.         return ret;

  686. 

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

  688. 

  689.     return 0;

  690. }

  691. 

  692. av_cold void ff_snow_common_end(SnowContext *s)

  693. {

  694.     int plane_index, level, orientation, i;

  695. 

  696.     av_freep(&s->spatial_dwt_buffer);

  697.     av_freep(&s->temp_dwt_buffer);

  698.     av_freep(&s->spatial_idwt_buffer);

  699.     av_freep(&s->temp_idwt_buffer);

  700.     av_freep(&s->run_buffer);

  701. 

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

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

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

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

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

  707. 

  708.     av_freep(&s->block);

  709.     av_freep(&s->scratchbuf);

  710.     av_freep(&s->emu_edge_buffer);

  711. 

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

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

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

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

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

  717.         }

  718.         av_frame_free(&s->last_picture[i]);

  719.     }

  720. 

  721.     for(plane_index=0; plane_index < s->nb_planes; plane_index++){

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

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

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

  725. 

  726.                 av_freep(&b->x_coeff);

  727.             }

  728.         }

  729.     }

  730.     av_frame_free(&s->mconly_picture);

  731.     av_frame_free(&s->current_picture);

  732. }