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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 Libav.

  5.  *

  6.  * Libav 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.  * Libav 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 Libav; 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 "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. #undef NDEBUG

  36. #include <assert.h>

  37. 

  38. 

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

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

  41.     int y, x;

  42.     IDWTELEM * dst;

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

  44.         //FIXME ugly misuse of obmc_stride

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

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

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

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

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

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

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

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

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

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

  55. 

  56.             v <<= 8 - LOG2_OBMC_MAX;

  57.             if(FRAC_BITS != 8){

  58.                 v >>= 8 - FRAC_BITS;

  59.             }

  60.             if(add){

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

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

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

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

  65.             }else{

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

  67.             }

  68.         }

  69.     }

  70. }

  71. 

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

  73.     int plane_index, level, orientation;

  74. 

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

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

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

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

  79.             }

  80.         }

  81.     }

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

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

  84. }

  85. 

  86. int ff_snow_alloc_blocks(SnowContext *s){

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

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

  89. 

  90.     s->b_width = w;

  91.     s->b_height= h;

  92. 

  93.     av_free(s->block);

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

  95.     return 0;

  96. }

  97. 

  98. static void init_qexp(void){

  99.     int i;

  100.     double v=128;

  101. 

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

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

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

  105.     }

  106. }

  107. 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){

  108.     static const uint8_t weight[64]={

  109.     8,7,6,5,4,3,2,1,

  110.     7,7,0,0,0,0,0,1,

  111.     6,0,6,0,0,0,2,0,

  112.     5,0,0,5,0,3,0,0,

  113.     4,0,0,0,4,0,0,0,

  114.     3,0,0,5,0,3,0,0,

  115.     2,0,6,0,0,0,2,0,

  116.     1,7,0,0,0,0,0,1,

  117.     };

  118. 

  119.     static const uint8_t brane[256]={

  120.     0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x11,0x12,0x12,0x12,0x12,0x12,0x12,0x12,

  121.     0x04,0x05,0xcc,0xcc,0xcc,0xcc,0xcc,0x41,0x15,0x16,0xcc,0xcc,0xcc,0xcc,0xcc,0x52,

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

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

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

  125.     0x04,0xcc,0xcc,0x41,0xcc,0x05,0xcc,0xcc,0x15,0xcc,0xcc,0x52,0xcc,0x16,0xcc,0xcc,

  126.     0x04,0xcc,0x41,0xcc,0xcc,0xcc,0x05,0xcc,0x15,0xcc,0x52,0xcc,0xcc,0xcc,0x16,0xcc,

  127.     0x04,0x41,0xcc,0xcc,0xcc,0xcc,0xcc,0x05,0x15,0x52,0xcc,0xcc,0xcc,0xcc,0xcc,0x16,

  128.     0x44,0x45,0x45,0x45,0x45,0x45,0x45,0x45,0x55,0x56,0x56,0x56,0x56,0x56,0x56,0x56,

  129.     0x48,0x49,0xcc,0xcc,0xcc,0xcc,0xcc,0x85,0x59,0x5A,0xcc,0xcc,0xcc,0xcc,0xcc,0x96,

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

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

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

  133.     0x48,0xcc,0xcc,0x85,0xcc,0x49,0xcc,0xcc,0x59,0xcc,0xcc,0x96,0xcc,0x5A,0xcc,0xcc,

  134.     0x48,0xcc,0x85,0xcc,0xcc,0xcc,0x49,0xcc,0x59,0xcc,0x96,0xcc,0xcc,0xcc,0x5A,0xcc,

  135.     0x48,0x85,0xcc,0xcc,0xcc,0xcc,0xcc,0x49,0x59,0x96,0xcc,0xcc,0xcc,0xcc,0xcc,0x5A,

  136.     };

  137. 

  138.     static const uint8_t needs[16]={

  139.     0,1,0,0,

  140.     2,4,2,0,

  141.     0,1,0,0,

  142.     15

  143.     };

  144. 

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

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

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

  148.     int16_t *tmpI= tmpIt;

  149.     uint8_t *tmp2= tmp2t[0];

  150.     const uint8_t *hpel[11];

  151.     assert(dx<16 && dy<16);

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

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

  154. 

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

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

  157.         b= 15;

  158. 

  159.     if(b&5){

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

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

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

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

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

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

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

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

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

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

  170.                 int am=0;

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

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

  173.                     tmpI[x]= am;

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

  175.                 }else{

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

  177.                     tmpI[x]= am;

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

  179.                 }

  180. 

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

  182.                 tmp2[x]= am;

  183.             }

  184.             tmpI+= 64;

  185.             tmp2+= 64;

  186.             src += stride;

  187.         }

  188.         src -= stride*y;

  189.     }

  190.     src += HTAPS_MAX/2 - 1;

  191.     tmp2= tmp2t[1];

  192. 

  193.     if(b&2){

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

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

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

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

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

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

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

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

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

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

  204.                 int am=0;

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

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

  207.                 else

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

  209. 

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

  211.                 tmp2[x]= am;

  212.             }

  213.             src += stride;

  214.             tmp2+= 64;

  215.         }

  216.         src -= stride*y;

  217.     }

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

  219.     tmp2= tmp2t[2];

  220.     tmpI= tmpIt;

  221.     if(b&4){

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

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

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

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

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

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

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

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

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

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

  232.                 int am=0;

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

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

  235.                 else

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

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

  238.                 tmp2[x]= am;

  239.             }

  240.             tmpI+= 64;

  241.             tmp2+= 64;

  242.         }

  243.     }

  244. 

  245.     hpel[ 0]= src;

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

  247.     hpel[ 2]= src + 1;

  248. 

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

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

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

  252. 

  253.     hpel[ 8]= src + stride;

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

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

  256. 

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

  258. 

  259.     if(b==15){

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

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

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

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

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

  265.         int stride1 = MC_STRIDE(dxy);

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

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

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

  269.         dx&=7;

  270.         dy&=7;

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

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

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

  274.                          (8-dx)*   dy *src3[x] + dx*   dy *src4[x]+32)>>6;

  275.             }

  276.             src1+=stride1;

  277.             src2+=stride2;

  278.             src3+=stride3;

  279.             src4+=stride4;

  280.             dst +=stride;

  281.         }

  282.     }else{

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

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

  285.         int stride1 = MC_STRIDE(l);

  286.         int stride2 = MC_STRIDE(r);

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

  288.         int b= 8-a;

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

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

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

  292.             }

  293.             src1+=stride1;

  294.             src2+=stride2;

  295.             dst +=stride;

  296.         }

  297.     }

  298. }

  299. 

  300. 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){

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

  302.         int x, y;

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

  304.         const unsigned color4 = color*0x01010101;

  305.         if(b_w==32){

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

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

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

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

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

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

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

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

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

  315.             }

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

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

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

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

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

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

  322.             }

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

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

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

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

  327.             }

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

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

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

  331.             }

  332.         }else{

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

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

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

  336.                 }

  337.             }

  338.         }

  339.     }else{

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

  341.         const int scale= plane_index ?  s->mv_scale : 2*s->mv_scale;

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

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

  344.         const int dx= mx&15;

  345.         const int dy= my&15;

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

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

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

  349.         src += sx + sy*stride;

  350.         if(   (unsigned)sx >= w - b_w - (HTAPS_MAX-2)

  351.            || (unsigned)sy >= h - b_h - (HTAPS_MAX-2)){

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

  353.             src= tmp + MB_SIZE;

  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.         assert(b_w>1 && b_h>1);

  358.         assert((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->dsp.put_h264_qpel_pixels_tab[0][dy+(dx>>2)](dst + y*stride, src + 3 + (y+3)*stride,stride);

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

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

  372.         }else{

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

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

  375.             s->dsp.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, int stride, int h){\

  382.     assert(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, ret;

  399.     int emu_buf_size;

  400. 

  401.     s->avctx= avctx;

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

  403. 

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

  405.     ff_dwt_init(&s->dwt);

  406. 

  407. #define mcf(dx,dy)\

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

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

  410.         s->dsp.put_h264_qpel_pixels_tab[0][dy+dx/4];\

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

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

  413.         s->dsp.put_h264_qpel_pixels_tab[1][dy+dx/4];

  414. 

  415.     mcf( 0, 0)

  416.     mcf( 4, 0)

  417.     mcf( 8, 0)

  418.     mcf(12, 0)

  419.     mcf( 0, 4)

  420.     mcf( 4, 4)

  421.     mcf( 8, 4)

  422.     mcf(12, 4)

  423.     mcf( 0, 8)

  424.     mcf( 4, 8)

  425.     mcf( 8, 8)

  426.     mcf(12, 8)

  427.     mcf( 0,12)

  428.     mcf( 4,12)

  429.     mcf( 8,12)

  430.     mcf(12,12)

  431. 

  432. #define mcfh(dx,dy)\

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

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

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

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

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

  438.         mc_block_hpel ## dx ## dy ## 8;

  439. 

  440.     mcfh(0, 0)

  441.     mcfh(8, 0)

  442.     mcfh(0, 8)

  443.     mcfh(8, 8)

  444. 

  445.     init_qexp();

  446. 

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

  448. 

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

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

  451. 

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

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

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

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

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

  457. 

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

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

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

  461. 

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

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

  464.         return ret;

  465.     }

  466.     FF_ALLOC_OR_GOTO(avctx, s->scratchbuf, s->mconly_picture.linesize[0]*7*MB_SIZE, fail);

  467.     emu_buf_size = s->mconly_picture.linesize[0] * (2 * MB_SIZE + HTAPS_MAX - 1);

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

  469. 

  470.     return 0;

  471. fail:

  472.     return AVERROR(ENOMEM);

  473. }

  474. 

  475. int ff_snow_common_init_after_header(AVCodecContext *avctx) {

  476.     SnowContext *s = avctx->priv_data;

  477.     int plane_index, level, orientation;

  478. 

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

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

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

  482. 

  483.         if(plane_index){

  484.             w>>= s->chroma_h_shift;

  485.             h>>= s->chroma_v_shift;

  486.         }

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

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

  489. 

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

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

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

  493. 

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

  495.                 b->level= level;

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

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

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

  499. 

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

  501.                 b->buf_x_offset = 0;

  502.                 b->buf_y_offset = 0;

  503. 

  504.                 if(orientation&1){

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

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

  507.                 }

  508.                 if(orientation>1){

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

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

  511.                 }

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

  513. 

  514.                 if(level)

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

  516.                 //FIXME avoid this realloc

  517.                 av_freep(&b->x_coeff);

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

  519.             }

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

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

  522.         }

  523.     }

  524. 

  525.     return 0;

  526. }

  527. 

  528. #define USE_HALFPEL_PLANE 0

  529. 

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

  531.     int p,x,y;

  532. 

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

  534.         int is_chroma= !!p;

  535.         int w= s->avctx->width  >>is_chroma;

  536.         int h= s->avctx->height >>is_chroma;

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

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

  539. 

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

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

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

  543. 

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

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

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

  547.                 int i= y*ls + x;

  548. 

  549.                 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;

  550.             }

  551.         }

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

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

  554.                 int i= y*ls + x;

  555. 

  556.                 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;

  557.             }

  558.         }

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

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

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

  562.                 int i= y*ls + x;

  563. 

  564.                 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;

  565.             }

  566.         }

  567. 

  568. //FIXME border!

  569.     }

  570. }

  571. 

  572. void ff_snow_release_buffer(AVCodecContext *avctx)

  573. {

  574.     SnowContext *s = avctx->priv_data;

  575.     int i;

  576. 

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

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

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

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

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

  582.     }

  583. }

  584. 

  585. int ff_snow_frame_start(SnowContext *s){

  586.    AVFrame tmp;

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

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

  589. 

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

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

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

  593.                           EDGE_WIDTH  , EDGE_WIDTH  , EDGE_TOP | EDGE_BOTTOM);

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

  595.                           s->current_picture.linesize[1], w>>1, h>>1,

  596.                           EDGE_WIDTH/2, EDGE_WIDTH/2, EDGE_TOP | EDGE_BOTTOM);

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

  598.                           s->current_picture.linesize[2], w>>1, h>>1,

  599.                           EDGE_WIDTH/2, EDGE_WIDTH/2, EDGE_TOP | EDGE_BOTTOM);

  600.     }

  601. 

  602.     ff_snow_release_buffer(s->avctx);

  603. 

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

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

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

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

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

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

  610.     s->current_picture= tmp;

  611. 

  612.     if(s->keyframe){

  613.         s->ref_frames= 0;

  614.     }else{

  615.         int i;

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

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

  618.                 break;

  619.         s->ref_frames= i;

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

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

  622.             return -1;

  623.         }

  624.     }

  625. 

  626.     s->current_picture.reference= 1;

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

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

  629.         return -1;

  630.     }

  631. 

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

  633. 

  634.     return 0;

  635. }

  636. 

  637. av_cold void ff_snow_common_end(SnowContext *s)

  638. {

  639.     int plane_index, level, orientation, i;

  640. 

  641.     av_freep(&s->spatial_dwt_buffer);

  642.     av_freep(&s->temp_dwt_buffer);

  643.     av_freep(&s->spatial_idwt_buffer);

  644.     av_freep(&s->temp_idwt_buffer);

  645.     av_freep(&s->run_buffer);

  646. 

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

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

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

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

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

  652. 

  653.     av_freep(&s->block);

  654.     av_freep(&s->scratchbuf);

  655.     av_freep(&s->emu_edge_buffer);

  656. 

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

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

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

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

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

  662.     }

  663. 

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

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

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

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

  668. 

  669.                 av_freep(&b->x_coeff);

  670.             }

  671.         }

  672.     }

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

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

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

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

  677. }