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FFmpeg/libavcodec/svq1.c

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  1. /*

  2.  * 

  3.  * Copyright (C) 2002 the xine project

  4.  * Copyright (C) 2002 the ffmpeg project

  5.  * 

  6.  * This library 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 of the License, or (at your option) any later version.

  10.  *

  11.  * This library 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 this library; if not, write to the Free Software

  18.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  19.  *

  20.  * (SVQ1 Decoder)

  21.  * Ported to mplayer by Arpi <arpi@thot.banki.hu>

  22.  * Ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>

  23.  *

  24.  * SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>

  25.  */

  26. 

  27. /**

  28.  * @file svq1.c

  29.  * Sorenson Vector Quantizer #1 (SVQ1) video codec.

  30.  * For more information of the SVQ1 algorithm, visit:

  31.  *   http://www.pcisys.net/~melanson/codecs/

  32.  */

  33. 

  34. 

  35. //#define DEBUG_SVQ1

  36. #include <stdio.h>

  37. #include <stdlib.h>

  38. #include <string.h>

  39. #include <unistd.h>

  40. #include <limits.h>

  41. 

  42. #include "common.h"

  43. #include "avcodec.h"

  44. #include "dsputil.h"

  45. #include "mpegvideo.h"

  46. #include "bswap.h"

  47. 

  48. #undef NDEBUG

  49. #include <assert.h>

  50. 

  51. extern const uint8_t mvtab[33][2];

  52. 

  53. static VLC svq1_block_type;

  54. static VLC svq1_motion_component;

  55. static VLC svq1_intra_multistage[6];

  56. static VLC svq1_inter_multistage[6];

  57. static VLC svq1_intra_mean;

  58. static VLC svq1_inter_mean;

  59. 

  60. #define SVQ1_BLOCK_SKIP		0

  61. #define SVQ1_BLOCK_INTER	1

  62. #define SVQ1_BLOCK_INTER_4V	2

  63. #define SVQ1_BLOCK_INTRA	3

  64. 

  65. typedef struct SVQ1Context {

  66.     MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to make the motion estimation eventually independant of MpegEncContext, so this will be removed then (FIXME/XXX)

  67.     AVCodecContext *avctx;

  68.     DSPContext dsp;

  69.     AVFrame picture;

  70.     AVFrame current_picture;

  71.     AVFrame last_picture;

  72.     PutBitContext pb;

  73.     GetBitContext gb;

  74.     

  75.     PutBitContext reorder_pb[6]; //why ooh why this sick breadth first order, everything is slower and more complex

  76. 

  77.     int frame_width;

  78.     int frame_height;

  79. 

  80.     /* Y plane block dimensions */

  81.     int y_block_width;

  82.     int y_block_height;

  83. 

  84.     /* U & V plane (C planes) block dimensions */

  85.     int c_block_width;

  86.     int c_block_height;

  87.     

  88.     uint16_t *mb_type;

  89.     uint32_t *dummy;

  90.     int16_t (*motion_val8[3])[2];

  91.     int16_t (*motion_val16[3])[2];

  92. 

  93.     int64_t rd_total;

  94. } SVQ1Context;

  95. 

  96. /* motion vector (prediction) */

  97. typedef struct svq1_pmv_s {

  98.   int		 x;

  99.   int		 y;

  100. } svq1_pmv_t;

  101. 

  102. #include "svq1_cb.h"

  103. #include "svq1_vlc.h"

  104. 

  105. static const uint16_t checksum_table[256] = {

  106.   0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,

  107.   0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,

  108.   0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,

  109.   0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,

  110.   0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,

  111.   0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,

  112.   0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,

  113.   0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,

  114.   0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,

  115.   0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,

  116.   0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,

  117.   0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,

  118.   0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,

  119.   0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,

  120.   0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,

  121.   0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,

  122.   0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,

  123.   0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,

  124.   0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,

  125.   0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,

  126.   0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,

  127.   0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,

  128.   0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,

  129.   0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,

  130.   0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,

  131.   0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,

  132.   0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,

  133.   0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,

  134.   0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,

  135.   0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,

  136.   0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,

  137.   0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0

  138. };

  139. 

  140. static const uint8_t string_table[256] = {

  141.   0x00, 0xD5, 0x7F, 0xAA, 0xFE, 0x2B, 0x81, 0x54,

  142.   0x29, 0xFC, 0x56, 0x83, 0xD7, 0x02, 0xA8, 0x7D,

  143.   0x52, 0x87, 0x2D, 0xF8, 0xAC, 0x79, 0xD3, 0x06,

  144.   0x7B, 0xAE, 0x04, 0xD1, 0x85, 0x50, 0xFA, 0x2F,

  145.   0xA4, 0x71, 0xDB, 0x0E, 0x5A, 0x8F, 0x25, 0xF0,

  146.   0x8D, 0x58, 0xF2, 0x27, 0x73, 0xA6, 0x0C, 0xD9,

  147.   0xF6, 0x23, 0x89, 0x5C, 0x08, 0xDD, 0x77, 0xA2,

  148.   0xDF, 0x0A, 0xA0, 0x75, 0x21, 0xF4, 0x5E, 0x8B,

  149.   0x9D, 0x48, 0xE2, 0x37, 0x63, 0xB6, 0x1C, 0xC9,

  150.   0xB4, 0x61, 0xCB, 0x1E, 0x4A, 0x9F, 0x35, 0xE0,

  151.   0xCF, 0x1A, 0xB0, 0x65, 0x31, 0xE4, 0x4E, 0x9B,

  152.   0xE6, 0x33, 0x99, 0x4C, 0x18, 0xCD, 0x67, 0xB2,

  153.   0x39, 0xEC, 0x46, 0x93, 0xC7, 0x12, 0xB8, 0x6D,

  154.   0x10, 0xC5, 0x6F, 0xBA, 0xEE, 0x3B, 0x91, 0x44,

  155.   0x6B, 0xBE, 0x14, 0xC1, 0x95, 0x40, 0xEA, 0x3F,

  156.   0x42, 0x97, 0x3D, 0xE8, 0xBC, 0x69, 0xC3, 0x16,

  157.   0xEF, 0x3A, 0x90, 0x45, 0x11, 0xC4, 0x6E, 0xBB,

  158.   0xC6, 0x13, 0xB9, 0x6C, 0x38, 0xED, 0x47, 0x92,

  159.   0xBD, 0x68, 0xC2, 0x17, 0x43, 0x96, 0x3C, 0xE9,

  160.   0x94, 0x41, 0xEB, 0x3E, 0x6A, 0xBF, 0x15, 0xC0,

  161.   0x4B, 0x9E, 0x34, 0xE1, 0xB5, 0x60, 0xCA, 0x1F,

  162.   0x62, 0xB7, 0x1D, 0xC8, 0x9C, 0x49, 0xE3, 0x36,

  163.   0x19, 0xCC, 0x66, 0xB3, 0xE7, 0x32, 0x98, 0x4D,

  164.   0x30, 0xE5, 0x4F, 0x9A, 0xCE, 0x1B, 0xB1, 0x64,

  165.   0x72, 0xA7, 0x0D, 0xD8, 0x8C, 0x59, 0xF3, 0x26,

  166.   0x5B, 0x8E, 0x24, 0xF1, 0xA5, 0x70, 0xDA, 0x0F,

  167.   0x20, 0xF5, 0x5F, 0x8A, 0xDE, 0x0B, 0xA1, 0x74,

  168.   0x09, 0xDC, 0x76, 0xA3, 0xF7, 0x22, 0x88, 0x5D,

  169.   0xD6, 0x03, 0xA9, 0x7C, 0x28, 0xFD, 0x57, 0x82,

  170.   0xFF, 0x2A, 0x80, 0x55, 0x01, 0xD4, 0x7E, 0xAB,

  171.   0x84, 0x51, 0xFB, 0x2E, 0x7A, 0xAF, 0x05, 0xD0,

  172.   0xAD, 0x78, 0xD2, 0x07, 0x53, 0x86, 0x2C, 0xF9

  173. };

  174. 

  175. #define SVQ1_PROCESS_VECTOR()\

  176.     for (; level > 0; i++) {\

  177.       /* process next depth */\

  178.       if (i == m) {\

  179. 	m = n;\

  180. 	if (--level == 0)\

  181. 	  break;\

  182.       }\

  183.       /* divide block if next bit set */\

  184.       if (get_bits (bitbuf, 1) == 0)\

  185. 	break;\

  186.       /* add child nodes */\

  187.       list[n++] = list[i];\

  188.       list[n++] = list[i] + (((level & 1) ? pitch : 1) << ((level / 2) + 1));\

  189.     }

  190. 

  191. #define SVQ1_ADD_CODEBOOK()\

  192. 	  /* add codebook entries to vector */\

  193. 	  for (j=0; j < stages; j++) {\

  194. 	    n3  = codebook[entries[j]] ^ 0x80808080;\

  195. 	    n1 += ((n3 & 0xFF00FF00) >> 8);\

  196. 	    n2 +=  (n3 & 0x00FF00FF);\

  197. 	  }\

  198. \

  199. 	  /* clip to [0..255] */\

  200. 	  if (n1 & 0xFF00FF00) {\

  201. 	    n3  = ((( n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\

  202. 	    n1 += 0x7F007F00;\

  203. 	    n1 |= (((~n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\

  204. 	    n1 &= (n3 & 0x00FF00FF);\

  205. 	  }\

  206. \

  207. 	  if (n2 & 0xFF00FF00) {\

  208. 	    n3  = ((( n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\

  209. 	    n2 += 0x7F007F00;\

  210. 	    n2 |= (((~n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\

  211. 	    n2 &= (n3 & 0x00FF00FF);\

  212. 	  }

  213. 

  214. #define SVQ1_DO_CODEBOOK_INTRA()\

  215.       for (y=0; y < height; y++) {\

  216. 	for (x=0; x < (width / 4); x++, codebook++) {\

  217. 	n1 = n4;\

  218. 	n2 = n4;\

  219. 	SVQ1_ADD_CODEBOOK()\

  220. 	/* store result */\

  221. 	dst[x] = (n1 << 8) | n2;\

  222. 	}\

  223. 	dst += (pitch / 4);\

  224.       }

  225. 

  226. #define SVQ1_DO_CODEBOOK_NONINTRA()\

  227.       for (y=0; y < height; y++) {\

  228. 	for (x=0; x < (width / 4); x++, codebook++) {\

  229. 	n3 = dst[x];\

  230. 	/* add mean value to vector */\

  231. 	n1 = ((n3 & 0xFF00FF00) >> 8) + n4;\

  232. 	n2 =  (n3 & 0x00FF00FF)	  + n4;\

  233. 	SVQ1_ADD_CODEBOOK()\

  234. 	/* store result */\

  235. 	dst[x] = (n1 << 8) | n2;\

  236. 	}\

  237. 	dst += (pitch / 4);\

  238.       }

  239. 

  240. #define SVQ1_CALC_CODEBOOK_ENTRIES(cbook)\

  241.       codebook = (const uint32_t *) cbook[level];\

  242.       bit_cache = get_bits (bitbuf, 4*stages);\

  243.       /* calculate codebook entries for this vector */\

  244.       for (j=0; j < stages; j++) {\

  245. 	entries[j] = (((bit_cache >> (4*(stages - j - 1))) & 0xF) + 16*j) << (level + 1);\

  246.       }\

  247.       mean -= (stages * 128);\

  248.       n4    = ((mean + (mean >> 31)) << 16) | (mean & 0xFFFF);

  249. 

  250. static int svq1_decode_block_intra (GetBitContext *bitbuf, uint8_t *pixels, int pitch ) {

  251.   uint32_t    bit_cache;

  252.   uint8_t    *list[63];

  253.   uint32_t   *dst;

  254.   const uint32_t *codebook;

  255.   int	      entries[6];

  256.   int	      i, j, m, n;

  257.   int	      mean, stages;

  258.   unsigned    x, y, width, height, level;

  259.   uint32_t    n1, n2, n3, n4;

  260. 

  261.   /* initialize list for breadth first processing of vectors */

  262.   list[0] = pixels;

  263. 

  264.   /* recursively process vector */

  265.   for (i=0, m=1, n=1, level=5; i < n; i++) {

  266.     SVQ1_PROCESS_VECTOR();

  267. 

  268.     /* destination address and vector size */

  269.     dst = (uint32_t *) list[i];

  270.     width = 1 << ((4 + level) /2);

  271.     height = 1 << ((3 + level) /2);

  272. 

  273.     /* get number of stages (-1 skips vector, 0 for mean only) */

  274.     stages = get_vlc2(bitbuf, svq1_intra_multistage[level].table, 3, 3) - 1;

  275. 

  276.     if (stages == -1) {

  277. 	for (y=0; y < height; y++) {

  278. 	  memset (&dst[y*(pitch / 4)], 0, width);

  279. 	}

  280.       continue;		/* skip vector */

  281.     }

  282. 

  283.     if ((stages > 0) && (level >= 4)) {

  284. #ifdef DEBUG_SVQ1

  285.     av_log(s->avctx, AV_LOG_INFO, "Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i\n",stages,level);

  286. #endif

  287.       return -1;	/* invalid vector */

  288.     }

  289. 

  290.     mean = get_vlc2(bitbuf, svq1_intra_mean.table, 8, 3);

  291. 

  292.     if (stages == 0) {

  293.       for (y=0; y < height; y++) {

  294. 	memset (&dst[y*(pitch / 4)], mean, width);

  295.       }

  296.     } else {

  297.       SVQ1_CALC_CODEBOOK_ENTRIES(svq1_intra_codebooks);

  298.       SVQ1_DO_CODEBOOK_INTRA()

  299.     }

  300.   }

  301. 

  302.   return 0;

  303. }

  304. 

  305. static int svq1_decode_block_non_intra (GetBitContext *bitbuf, uint8_t *pixels, int pitch ) {

  306.   uint32_t    bit_cache;

  307.   uint8_t    *list[63];

  308.   uint32_t   *dst;

  309.   const uint32_t *codebook;

  310.   int	      entries[6];

  311.   int	      i, j, m, n;

  312.   int	      mean, stages;

  313.   int	      x, y, width, height, level;

  314.   uint32_t    n1, n2, n3, n4;

  315. 

  316.   /* initialize list for breadth first processing of vectors */

  317.   list[0] = pixels;

  318. 

  319.   /* recursively process vector */

  320.   for (i=0, m=1, n=1, level=5; i < n; i++) {

  321.     SVQ1_PROCESS_VECTOR();

  322. 

  323.     /* destination address and vector size */

  324.     dst = (uint32_t *) list[i];

  325.     width = 1 << ((4 + level) /2);

  326.     height = 1 << ((3 + level) /2);

  327. 

  328.     /* get number of stages (-1 skips vector, 0 for mean only) */

  329.     stages = get_vlc2(bitbuf, svq1_inter_multistage[level].table, 3, 2) - 1;

  330. 

  331.     if (stages == -1) continue;	/* skip vector */

  332. 

  333.     if ((stages > 0) && (level >= 4)) {

  334. #ifdef DEBUG_SVQ1

  335.     av_log(s->avctx, AV_LOG_INFO, "Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i\n",stages,level);

  336. #endif

  337.       return -1;	/* invalid vector */

  338.     }

  339. 

  340.     mean = get_vlc2(bitbuf, svq1_inter_mean.table, 9, 3) - 256;

  341. 

  342.     SVQ1_CALC_CODEBOOK_ENTRIES(svq1_inter_codebooks);

  343.     SVQ1_DO_CODEBOOK_NONINTRA()

  344.   }

  345.   return 0;

  346. }

  347. 

  348. static int svq1_decode_motion_vector (GetBitContext *bitbuf, svq1_pmv_t *mv, svq1_pmv_t **pmv) {

  349.   int	      diff;

  350.   int	      i;

  351. 

  352.   for (i=0; i < 2; i++) {

  353. 

  354.     /* get motion code */

  355.     diff = get_vlc2(bitbuf, svq1_motion_component.table, 7, 2);

  356.     if(diff<0) 

  357.         return -1;

  358.     else if(diff){

  359.         if(get_bits1(bitbuf)) diff= -diff;

  360.     }

  361. 

  362.     /* add median of motion vector predictors and clip result */

  363.     if (i == 1)

  364.       mv->y = ((diff + mid_pred(pmv[0]->y, pmv[1]->y, pmv[2]->y)) << 26) >> 26;

  365.     else

  366.       mv->x = ((diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x)) << 26) >> 26;

  367.   }

  368. 

  369.   return 0;

  370. }

  371. 

  372. static void svq1_skip_block (uint8_t *current, uint8_t *previous, int pitch, int x, int y) {

  373.   uint8_t *src;

  374.   uint8_t *dst;

  375.   int	   i;

  376. 

  377.   src = &previous[x + y*pitch];

  378.   dst = current;

  379. 

  380.   for (i=0; i < 16; i++) {

  381.     memcpy (dst, src, 16);

  382.     src += pitch;

  383.     dst += pitch;

  384.   }

  385. }

  386. 

  387. static int svq1_motion_inter_block (MpegEncContext *s, GetBitContext *bitbuf,

  388. 			       uint8_t *current, uint8_t *previous, int pitch,

  389. 			       svq1_pmv_t *motion, int x, int y) {

  390.   uint8_t    *src;

  391.   uint8_t    *dst;

  392.   svq1_pmv_t  mv;

  393.   svq1_pmv_t *pmv[3];

  394.   int	      result;

  395. 

  396.   /* predict and decode motion vector */

  397.   pmv[0] = &motion[0];

  398.   if (y == 0) {

  399.     pmv[1] =

  400.     pmv[2] = pmv[0];

  401.   }

  402.   else {

  403.     pmv[1] = &motion[(x / 8) + 2];

  404.     pmv[2] = &motion[(x / 8) + 4];

  405.   }

  406. 

  407.   result = svq1_decode_motion_vector (bitbuf, &mv, pmv);

  408. 

  409.   if (result != 0)

  410.     return result;

  411. 

  412.   motion[0].x		=

  413.   motion[(x / 8) + 2].x	=

  414.   motion[(x / 8) + 3].x	= mv.x;

  415.   motion[0].y		=

  416.   motion[(x / 8) + 2].y	=

  417.   motion[(x / 8) + 3].y	= mv.y;

  418.   

  419.   if(y + (mv.y >> 1)<0)

  420.      mv.y= 0;

  421.   if(x + (mv.x >> 1)<0)

  422.      mv.x= 0;

  423. 

  424. #if 0

  425.   int w= (s->width+15)&~15;

  426.   int h= (s->height+15)&~15;

  427.   if(x + (mv.x >> 1)<0 || y + (mv.y >> 1)<0 || x + (mv.x >> 1) + 16 > w || y + (mv.y >> 1) + 16> h)

  428.       av_log(s->avctx, AV_LOG_INFO, "%d %d %d %d\n", x, y, x + (mv.x >> 1), y + (mv.y >> 1));

  429. #endif

  430.  

  431.   src = &previous[(x + (mv.x >> 1)) + (y + (mv.y >> 1))*pitch];

  432.   dst = current;

  433. 

  434.   s->dsp.put_pixels_tab[0][((mv.y & 1) << 1) | (mv.x & 1)](dst,src,pitch,16);

  435. 

  436.   return 0;

  437. }

  438. 

  439. static int svq1_motion_inter_4v_block (MpegEncContext *s, GetBitContext *bitbuf,

  440. 				  uint8_t *current, uint8_t *previous, int pitch,

  441. 				  svq1_pmv_t *motion,int x, int y) {

  442.   uint8_t    *src;

  443.   uint8_t    *dst;

  444.   svq1_pmv_t  mv;

  445.   svq1_pmv_t *pmv[4];

  446.   int	      i, result;

  447. 

  448.   /* predict and decode motion vector (0) */

  449.   pmv[0] = &motion[0];

  450.   if (y == 0) {

  451.     pmv[1] =

  452.     pmv[2] = pmv[0];

  453.   }

  454.   else {

  455.     pmv[1] = &motion[(x / 8) + 2];

  456.     pmv[2] = &motion[(x / 8) + 4];

  457.   }

  458. 

  459.   result = svq1_decode_motion_vector (bitbuf, &mv, pmv);

  460. 

  461.   if (result != 0)

  462.     return result;

  463. 

  464.   /* predict and decode motion vector (1) */

  465.   pmv[0] = &mv;

  466.   if (y == 0) {

  467.     pmv[1] =

  468.     pmv[2] = pmv[0];

  469.   }

  470.   else {

  471.     pmv[1] = &motion[(x / 8) + 3];

  472.   }

  473.   result = svq1_decode_motion_vector (bitbuf, &motion[0], pmv);

  474. 

  475.   if (result != 0)

  476.     return result;

  477. 

  478.   /* predict and decode motion vector (2) */

  479.   pmv[1] = &motion[0];

  480.   pmv[2] = &motion[(x / 8) + 1];

  481. 

  482.   result = svq1_decode_motion_vector (bitbuf, &motion[(x / 8) + 2], pmv);

  483. 

  484.   if (result != 0)

  485.     return result;

  486. 

  487.   /* predict and decode motion vector (3) */

  488.   pmv[2] = &motion[(x / 8) + 2];

  489.   pmv[3] = &motion[(x / 8) + 3];

  490. 

  491.   result = svq1_decode_motion_vector (bitbuf, pmv[3], pmv);

  492. 

  493.   if (result != 0)

  494.     return result;

  495. 

  496.   /* form predictions */

  497.   for (i=0; i < 4; i++) {

  498.     int mvx= pmv[i]->x + (i&1)*16;

  499.     int mvy= pmv[i]->y + (i>>1)*16;

  500.   

  501.     ///XXX /FIXME cliping or padding?

  502.     if(y + (mvy >> 1)<0)

  503.        mvy= 0;

  504.     if(x + (mvx >> 1)<0)

  505.        mvx= 0;

  506. 

  507. #if 0

  508.   int w= (s->width+15)&~15;

  509.   int h= (s->height+15)&~15;

  510.   if(x + (mvx >> 1)<0 || y + (mvy >> 1)<0 || x + (mvx >> 1) + 8 > w || y + (mvy >> 1) + 8> h)

  511.       av_log(s->avctx, AV_LOG_INFO, "%d %d %d %d\n", x, y, x + (mvx >> 1), y + (mvy >> 1));

  512. #endif

  513.     src = &previous[(x + (mvx >> 1)) + (y + (mvy >> 1))*pitch];

  514.     dst = current;

  515.     

  516.     s->dsp.put_pixels_tab[1][((mvy & 1) << 1) | (mvx & 1)](dst,src,pitch,8);

  517. 

  518.     /* select next block */

  519.     if (i & 1) {

  520.       current  += 8*(pitch - 1);

  521.     } else {

  522.       current  += 8;

  523.     }

  524.   }

  525. 

  526.   return 0;

  527. }

  528. 

  529. static int svq1_decode_delta_block (MpegEncContext *s, GetBitContext *bitbuf,

  530. 			uint8_t *current, uint8_t *previous, int pitch,

  531. 			svq1_pmv_t *motion, int x, int y) {

  532.   uint32_t block_type;

  533.   int	   result = 0;

  534. 

  535.   /* get block type */

  536.   block_type = get_vlc2(bitbuf, svq1_block_type.table, 2, 2);

  537. 

  538.   /* reset motion vectors */

  539.   if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) {

  540.     motion[0].x		  =

  541.     motion[0].y		  =

  542.     motion[(x / 8) + 2].x =

  543.     motion[(x / 8) + 2].y =

  544.     motion[(x / 8) + 3].x =

  545.     motion[(x / 8) + 3].y = 0;

  546.   }

  547. 

  548.   switch (block_type) {

  549.   case SVQ1_BLOCK_SKIP:

  550.     svq1_skip_block (current, previous, pitch, x, y);

  551.     break;

  552. 

  553.   case SVQ1_BLOCK_INTER:

  554.     result = svq1_motion_inter_block (s, bitbuf, current, previous, pitch, motion, x, y);

  555. 

  556.     if (result != 0)

  557.     {

  558. #ifdef DEBUG_SVQ1

  559.     av_log(s->avctx, AV_LOG_INFO, "Error in svq1_motion_inter_block %i\n",result);

  560. #endif

  561.       break;

  562.     }

  563.     result = svq1_decode_block_non_intra (bitbuf, current, pitch);

  564.     break;

  565. 

  566.   case SVQ1_BLOCK_INTER_4V:

  567.     result = svq1_motion_inter_4v_block (s, bitbuf, current, previous, pitch, motion, x, y);

  568. 

  569.     if (result != 0)

  570.     {

  571. #ifdef DEBUG_SVQ1

  572.     av_log(s->avctx, AV_LOG_INFO, "Error in svq1_motion_inter_4v_block %i\n",result);

  573. #endif

  574.       break;

  575.     }

  576.     result = svq1_decode_block_non_intra (bitbuf, current, pitch);

  577.     break;

  578. 

  579.   case SVQ1_BLOCK_INTRA:

  580.     result = svq1_decode_block_intra (bitbuf, current, pitch);

  581.     break;

  582.   }

  583. 

  584.   return result;

  585. }

  586. 

  587. /* standard video sizes */

  588. static struct { int width; int height; } svq1_frame_size_table[8] = {

  589.   { 160, 120 }, { 128,  96 }, { 176, 144 }, { 352, 288 },

  590.   { 704, 576 }, { 240, 180 }, { 320, 240 }, {  -1,  -1 }

  591. };

  592. 

  593. static uint16_t svq1_packet_checksum (uint8_t *data, int length, int value) {

  594.   int i;

  595. 

  596.   for (i=0; i < length; i++) {

  597.     value = checksum_table[data[i] ^ (value >> 8)] ^ ((value & 0xFF) << 8);

  598.   }

  599. 

  600.   return value;

  601. }

  602. 

  603. #if 0 /* unused, remove? */

  604. static uint16_t svq1_component_checksum (uint16_t *pixels, int pitch,

  605.                                          int width, int height, int value) {

  606.   int x, y;

  607. 

  608.   for (y=0; y < height; y++) {

  609.     for (x=0; x < width; x++) {

  610.       value = checksum_table[pixels[x] ^ (value >> 8)] ^ ((value & 0xFF) << 8);

  611.     }

  612. 

  613.     pixels += pitch;

  614.   }

  615. 

  616.   return value;

  617. }

  618. #endif

  619. 

  620. static void svq1_parse_string (GetBitContext *bitbuf, uint8_t *out) {

  621.   uint8_t seed;

  622.   int     i;

  623. 

  624.   out[0] = get_bits (bitbuf, 8);

  625. 

  626.   seed = string_table[out[0]];

  627. 

  628.   for (i=1; i <= out[0]; i++) {

  629.     out[i] = get_bits (bitbuf, 8) ^ seed;

  630.     seed   = string_table[out[i] ^ seed];

  631.   }

  632. }

  633. 

  634. static int svq1_decode_frame_header (GetBitContext *bitbuf,MpegEncContext *s) {

  635.   int frame_size_code;

  636.   int temporal_reference;

  637. 

  638.   temporal_reference = get_bits (bitbuf, 8);

  639. 

  640.   /* frame type */

  641.   s->pict_type= get_bits (bitbuf, 2)+1;

  642.   if(s->pict_type==4) 

  643.       return -1;

  644.       

  645.   if (s->pict_type == I_TYPE) {

  646. 

  647.     /* unknown fields */

  648.     if (s->f_code == 0x50 || s->f_code == 0x60) {

  649.       int csum = get_bits (bitbuf, 16);

  650. 

  651.       csum = svq1_packet_checksum ((uint8_t *)bitbuf->buffer, bitbuf->size_in_bits>>3, csum);

  652. 

  653. //      av_log(s->avctx, AV_LOG_INFO, "%s checksum (%02x) for packet data\n",

  654. //              (csum == 0) ? "correct" : "incorrect", csum);

  655.     }

  656. 

  657.     if ((s->f_code ^ 0x10) >= 0x50) {

  658.       char msg[256];

  659. 

  660.       svq1_parse_string (bitbuf, (char *) msg);

  661. 

  662.       av_log(s->avctx, AV_LOG_INFO, "embedded message: \"%s\"\n", (char *) msg);

  663.     }

  664. 

  665.     skip_bits (bitbuf, 2);

  666.     skip_bits (bitbuf, 2);

  667.     skip_bits1 (bitbuf);

  668. 

  669.     /* load frame size */

  670.     frame_size_code = get_bits (bitbuf, 3);

  671. 

  672.     if (frame_size_code == 7) {

  673.       /* load width, height (12 bits each) */

  674.       s->width = get_bits (bitbuf, 12);

  675.       s->height = get_bits (bitbuf, 12);

  676. 

  677.       if (!s->width || !s->height)

  678.         return -1;

  679.     } else {

  680.       /* get width, height from table */

  681.       s->width = svq1_frame_size_table[frame_size_code].width;

  682.       s->height = svq1_frame_size_table[frame_size_code].height;

  683.     }

  684.   }

  685. 

  686.   /* unknown fields */

  687.   if (get_bits (bitbuf, 1) == 1) {

  688.     skip_bits1 (bitbuf);       /* use packet checksum if (1) */

  689.     skip_bits1 (bitbuf);       /* component checksums after image data if (1) */

  690. 

  691.     if (get_bits (bitbuf, 2) != 0)

  692.       return -1;

  693.   }

  694. 

  695.   if (get_bits (bitbuf, 1) == 1) {

  696.     skip_bits1 (bitbuf);

  697.     skip_bits (bitbuf, 4);

  698.     skip_bits1 (bitbuf);

  699.     skip_bits (bitbuf, 2);

  700. 

  701.     while (get_bits (bitbuf, 1) == 1) {

  702.       skip_bits (bitbuf, 8);

  703.     }

  704.   }

  705.   

  706.   return 0;

  707. }

  708. 

  709. static int svq1_decode_frame(AVCodecContext *avctx, 

  710.                              void *data, int *data_size,

  711.                              uint8_t *buf, int buf_size)

  712. {

  713.   MpegEncContext *s=avctx->priv_data;

  714.   uint8_t      *current, *previous;

  715.   int		result, i, x, y, width, height;

  716.   AVFrame *pict = data; 

  717. 

  718.   /* initialize bit buffer */

  719.   init_get_bits(&s->gb,buf,buf_size*8);

  720. 

  721.   /* decode frame header */

  722.   s->f_code = get_bits (&s->gb, 22);

  723. 

  724.   if ((s->f_code & ~0x70) || !(s->f_code & 0x60))

  725.     return -1;

  726. 

  727.   /* swap some header bytes (why?) */

  728.   if (s->f_code != 0x20) {

  729.     uint32_t *src = (uint32_t *) (buf + 4);

  730. 

  731.     for (i=0; i < 4; i++) {

  732.       src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];

  733.     }

  734.   }

  735. 

  736.   result = svq1_decode_frame_header (&s->gb, s);

  737. 

  738.   if (result != 0)

  739.   {

  740. #ifdef DEBUG_SVQ1

  741.     av_log(s->avctx, AV_LOG_INFO, "Error in svq1_decode_frame_header %i\n",result);

  742. #endif

  743.     return result;

  744.   }

  745.   

  746.   //FIXME this avoids some confusion for "B frames" without 2 references

  747.   //this should be removed after libavcodec can handle more flexible picture types & ordering

  748.   if(s->pict_type==B_TYPE && s->last_picture_ptr==NULL) return buf_size;

  749.   

  750.   if(avctx->hurry_up && s->pict_type==B_TYPE) return buf_size;

  751.   if(  (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)

  752.      ||(avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)

  753.      || avctx->skip_frame >= AVDISCARD_ALL)

  754.       return buf_size;                            

  755. 

  756.   if(MPV_frame_start(s, avctx) < 0)

  757.       return -1;

  758. 

  759.   /* decode y, u and v components */

  760.   for (i=0; i < 3; i++) {

  761.     int linesize;

  762.     if (i == 0) {

  763.       width  = (s->width+15)&~15;

  764.       height = (s->height+15)&~15;

  765.       linesize= s->linesize;

  766.     } else {

  767.       if(s->flags&CODEC_FLAG_GRAY) break;

  768.       width  = (s->width/4+15)&~15;

  769.       height = (s->height/4+15)&~15;

  770.       linesize= s->uvlinesize;

  771.     }

  772. 

  773.     current  = s->current_picture.data[i];

  774. 

  775.     if(s->pict_type==B_TYPE){

  776.         previous = s->next_picture.data[i];

  777.     }else{

  778.         previous = s->last_picture.data[i];

  779.     }

  780. 

  781.     if (s->pict_type == I_TYPE) {

  782.       /* keyframe */

  783.       for (y=0; y < height; y+=16) {

  784. 	for (x=0; x < width; x+=16) {

  785. 	  result = svq1_decode_block_intra (&s->gb, &current[x], linesize);

  786. 	  if (result != 0)

  787. 	  {

  788. //#ifdef DEBUG_SVQ1

  789. 	    av_log(s->avctx, AV_LOG_INFO, "Error in svq1_decode_block %i (keyframe)\n",result);

  790. //#endif

  791. 	    return result;

  792. 	  }

  793. 	}

  794. 	current += 16*linesize;

  795.       }

  796.     } else {

  797.       svq1_pmv_t pmv[width/8+3];

  798.       /* delta frame */

  799.       memset (pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv_t));

  800. 

  801.       for (y=0; y < height; y+=16) {

  802. 	for (x=0; x < width; x+=16) {

  803. 	  result = svq1_decode_delta_block (s, &s->gb, &current[x], previous,

  804. 					    linesize, pmv, x, y);

  805. 	  if (result != 0)

  806. 	  {

  807. #ifdef DEBUG_SVQ1

  808.     av_log(s->avctx, AV_LOG_INFO, "Error in svq1_decode_delta_block %i\n",result);

  809. #endif

  810. 	    return result;

  811. 	  }

  812. 	}

  813. 

  814. 	pmv[0].x =

  815. 	pmv[0].y = 0;

  816. 

  817. 	current += 16*linesize;

  818.       }

  819.     }

  820.   }

  821.   

  822.   *pict = *(AVFrame*)&s->current_picture;

  823. 

  824. 

  825.   MPV_frame_end(s);

  826.   

  827.   *data_size=sizeof(AVFrame);

  828.   return buf_size;

  829. }

  830. 

  831. static int svq1_decode_init(AVCodecContext *avctx)

  832. {

  833.     MpegEncContext *s = avctx->priv_data;

  834.     int i;

  835. 

  836.     MPV_decode_defaults(s);

  837. 

  838.     s->avctx = avctx;

  839.     s->width = (avctx->width+3)&~3;

  840.     s->height = (avctx->height+3)&~3;

  841.     s->codec_id= avctx->codec->id;

  842.     avctx->pix_fmt = PIX_FMT_YUV410P;

  843.     avctx->has_b_frames= 1; // not true, but DP frames and these behave like unidirectional b frames

  844.     s->flags= avctx->flags;

  845.     if (MPV_common_init(s) < 0) return -1;

  846. 

  847.     init_vlc(&svq1_block_type, 2, 4,

  848.         &svq1_block_type_vlc[0][1], 2, 1,

  849.         &svq1_block_type_vlc[0][0], 2, 1, 1);

  850. 

  851.     init_vlc(&svq1_motion_component, 7, 33,

  852.         &mvtab[0][1], 2, 1,

  853.         &mvtab[0][0], 2, 1, 1);

  854. 

  855.     for (i = 0; i < 6; i++) {

  856.         init_vlc(&svq1_intra_multistage[i], 3, 8,

  857.             &svq1_intra_multistage_vlc[i][0][1], 2, 1,

  858.             &svq1_intra_multistage_vlc[i][0][0], 2, 1, 1);

  859.         init_vlc(&svq1_inter_multistage[i], 3, 8,

  860.             &svq1_inter_multistage_vlc[i][0][1], 2, 1,

  861.             &svq1_inter_multistage_vlc[i][0][0], 2, 1, 1);

  862.     }

  863. 

  864.     init_vlc(&svq1_intra_mean, 8, 256,

  865.         &svq1_intra_mean_vlc[0][1], 4, 2,

  866.         &svq1_intra_mean_vlc[0][0], 4, 2, 1);

  867. 

  868.     init_vlc(&svq1_inter_mean, 9, 512,

  869.         &svq1_inter_mean_vlc[0][1], 4, 2,

  870.         &svq1_inter_mean_vlc[0][0], 4, 2, 1);

  871. 

  872.     return 0;

  873. }

  874. 

  875. static int svq1_decode_end(AVCodecContext *avctx)

  876. {

  877.     MpegEncContext *s = avctx->priv_data;

  878. 

  879.     MPV_common_end(s);

  880.     return 0;

  881. }

  882. 

  883. static void svq1_write_header(SVQ1Context *s, int frame_type)

  884. {

  885.     int i;

  886. 

  887.     /* frame code */

  888.     put_bits(&s->pb, 22, 0x20);

  889. 

  890.     /* temporal reference (sure hope this is a "don't care") */

  891.     put_bits(&s->pb, 8, 0x00);

  892. 

  893.     /* frame type */

  894.     put_bits(&s->pb, 2, frame_type - 1);

  895. 

  896.     if (frame_type == I_TYPE) {

  897. 

  898.         /* no checksum since frame code is 0x20 */

  899. 

  900.         /* no embedded string either */

  901. 

  902.         /* output 5 unknown bits (2 + 2 + 1) */

  903.         put_bits(&s->pb, 5, 0);

  904. 

  905. 	for (i = 0; i < 7; i++)

  906. 	{

  907. 	    if ((svq1_frame_size_table[i].width == s->frame_width) &&

  908. 		(svq1_frame_size_table[i].height == s->frame_height))

  909. 	    {

  910. 		put_bits(&s->pb, 3, i);

  911. 		break;

  912. 	    }

  913. 	}

  914. 	

  915. 	if (i == 7)

  916. 	{

  917. 	    put_bits(&s->pb, 3, 7);

  918.     	    put_bits(&s->pb, 12, s->frame_width);

  919.     	    put_bits(&s->pb, 12, s->frame_height);

  920. 	}

  921.     }

  922. 

  923.     /* no checksum or extra data (next 2 bits get 0) */

  924.     put_bits(&s->pb, 2, 0);

  925. }

  926. 

  927. 

  928. #define QUALITY_THRESHOLD 100

  929. #define THRESHOLD_MULTIPLIER 0.6

  930. 

  931. #if defined(HAVE_ALTIVEC)

  932. #undef vector

  933. #endif

  934. 

  935. static int encode_block(SVQ1Context *s, uint8_t *src, uint8_t *ref, uint8_t *decoded, int stride, int level, int threshold, int lambda, int intra){

  936.     int count, y, x, i, j, split, best_mean, best_score, best_count;

  937.     int best_vector[6];

  938.     int block_sum[7]= {0, 0, 0, 0, 0, 0};

  939.     int w= 2<<((level+2)>>1);

  940.     int h= 2<<((level+1)>>1);

  941.     int size=w*h;

  942.     int16_t block[7][256];

  943.     const int8_t *codebook_sum, *codebook;

  944.     const uint16_t (*mean_vlc)[2];

  945.     const uint8_t (*multistage_vlc)[2];

  946. 

  947.     best_score=0;

  948.     //FIXME optimize, this doenst need to be done multiple times

  949.     if(intra){

  950.         codebook_sum= svq1_intra_codebook_sum[level];

  951.         codebook= svq1_intra_codebooks[level];

  952.         mean_vlc= svq1_intra_mean_vlc;

  953.         multistage_vlc= svq1_intra_multistage_vlc[level];

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

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

  956.                 int v= src[x + y*stride];

  957.                 block[0][x + w*y]= v;

  958.                 best_score += v*v;

  959.                 block_sum[0] += v;

  960.             }

  961.         }

  962.     }else{

  963.         codebook_sum= svq1_inter_codebook_sum[level];

  964.         codebook= svq1_inter_codebooks[level];

  965.         mean_vlc= svq1_inter_mean_vlc + 256;

  966.         multistage_vlc= svq1_inter_multistage_vlc[level];

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

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

  969.                 int v= src[x + y*stride] - ref[x + y*stride];

  970.                 block[0][x + w*y]= v;

  971.                 best_score += v*v;

  972.                 block_sum[0] += v;

  973.             }

  974.         }

  975.     }

  976. 

  977.     best_count=0;

  978.     best_score -= ((block_sum[0]*block_sum[0])>>(level+3));

  979.     best_mean= (block_sum[0] + (size>>1)) >> (level+3);

  980. 

  981.     if(level<4){

  982.         for(count=1; count<7; count++){

  983.             int best_vector_score= INT_MAX;

  984.             int best_vector_sum=-999, best_vector_mean=-999;

  985.             const int stage= count-1;

  986.             const int8_t *vector;

  987.     

  988.             for(i=0; i<16; i++){

  989.                 int sum= codebook_sum[stage*16 + i];

  990.                 int sqr=0;

  991.                 int diff, mean, score;

  992.     

  993.                 vector = codebook + stage*size*16 + i*size;

  994.     

  995.                 for(j=0; j<size; j++){

  996.                     int v= vector[j];

  997.                     sqr += (v - block[stage][j])*(v - block[stage][j]);

  998.                 }

  999.                 diff= block_sum[stage] - sum;

  1000.                 mean= (diff + (size>>1)) >> (level+3);

  1001.                 assert(mean >-300 && mean<300);

  1002.                 if(intra) mean= clip(mean, 0, 255);

  1003.                 else      mean= clip(mean, -256, 255);

  1004.                 score= sqr - ((diff*(int64_t)diff)>>(level+3)); //FIXME 64bit slooow

  1005.                 if(score < best_vector_score){

  1006.                     best_vector_score= score;

  1007.                     best_vector[stage]= i;

  1008.                     best_vector_sum= sum;

  1009.                     best_vector_mean= mean;

  1010.                 }

  1011.             }

  1012.             assert(best_vector_mean != -999);

  1013.             vector= codebook + stage*size*16 + best_vector[stage]*size;

  1014.             for(j=0; j<size; j++){

  1015.                 block[stage+1][j] = block[stage][j] - vector[j];

  1016.             }

  1017.             block_sum[stage+1]= block_sum[stage] - best_vector_sum;

  1018.             best_vector_score += 

  1019.                 lambda*(+ 1 + 4*count

  1020.                         + multistage_vlc[1+count][1]

  1021.                         + mean_vlc[best_vector_mean][1]);

  1022.     

  1023.             if(best_vector_score < best_score){

  1024.                 best_score= best_vector_score;

  1025.                 best_count= count;

  1026.                 best_mean= best_vector_mean;

  1027.             }

  1028.         }

  1029.     }

  1030.     

  1031.     split=0;

  1032.     if(best_score > threshold && level){

  1033.         int score=0;

  1034.         int offset= (level&1) ? stride*h/2 : w/2;

  1035.         PutBitContext backup[6];

  1036. 

  1037.         for(i=level-1; i>=0; i--){

  1038.             backup[i]= s->reorder_pb[i];

  1039.         }

  1040.         score += encode_block(s, src         , ref         , decoded         , stride, level-1, threshold>>1, lambda, intra);

  1041.         score += encode_block(s, src + offset, ref + offset, decoded + offset, stride, level-1, threshold>>1, lambda, intra);

  1042.         score += lambda;

  1043.         

  1044.         if(score < best_score){

  1045.             best_score= score;

  1046.             split=1;

  1047.         }else{

  1048.             for(i=level-1; i>=0; i--){

  1049.                 s->reorder_pb[i]= backup[i];

  1050.             }

  1051.         }

  1052.     }

  1053.     if (level > 0)

  1054.         put_bits(&s->reorder_pb[level], 1, split);

  1055. 

  1056.     if(!split){

  1057.         assert((best_mean >= 0 && best_mean<256) || !intra);

  1058.         assert(best_mean >= -256 && best_mean<256);

  1059.         assert(best_count >=0 && best_count<7);

  1060.         assert(level<4 || best_count==0);

  1061.             

  1062.         /* output the encoding */

  1063.         put_bits(&s->reorder_pb[level], 

  1064.             multistage_vlc[1 + best_count][1],

  1065.             multistage_vlc[1 + best_count][0]);

  1066.         put_bits(&s->reorder_pb[level], mean_vlc[best_mean][1],

  1067.             mean_vlc[best_mean][0]);

  1068. 

  1069.         for (i = 0; i < best_count; i++){

  1070.             assert(best_vector[i]>=0 && best_vector[i]<16);

  1071.             put_bits(&s->reorder_pb[level], 4, best_vector[i]);

  1072.         }

  1073.         

  1074.         for(y=0; y<h; y++){

  1075.             for(x=0; x<w; x++){

  1076.                 decoded[x + y*stride]= src[x + y*stride] - block[best_count][x + w*y] + best_mean;

  1077.             }

  1078.         }

  1079.     }

  1080. 

  1081.     return best_score;

  1082. }

  1083. 

  1084. #ifdef CONFIG_ENCODERS

  1085. 

  1086. static int svq1_encode_plane(SVQ1Context *s, int plane, unsigned char *src_plane, unsigned char *ref_plane, unsigned char *decoded_plane,

  1087.     int width, int height, int src_stride, int stride)

  1088. {

  1089.     int x, y;

  1090.     int i;

  1091.     int block_width, block_height;

  1092.     int level;

  1093.     int threshold[6];

  1094.     const int lambda= (s->picture.quality*s->picture.quality) >> (2*FF_LAMBDA_SHIFT);

  1095. 

  1096.     /* figure out the acceptable level thresholds in advance */

  1097.     threshold[5] = QUALITY_THRESHOLD;

  1098.     for (level = 4; level >= 0; level--)

  1099.         threshold[level] = threshold[level + 1] * THRESHOLD_MULTIPLIER;

  1100. 

  1101.     block_width = (width + 15) / 16;

  1102.     block_height = (height + 15) / 16;

  1103. 

  1104.     if(s->picture.pict_type == P_TYPE){

  1105.         s->m.avctx= s->avctx;

  1106.         s->m.current_picture_ptr= &s->m.current_picture;

  1107.         s->m.last_picture_ptr   = &s->m.last_picture;

  1108.         s->m.last_picture.data[0]= ref_plane;

  1109.         s->m.linesize=

  1110.         s->m.last_picture.linesize[0]= 

  1111.         s->m.new_picture.linesize[0]= 

  1112.         s->m.current_picture.linesize[0]= stride;

  1113.         s->m.width= width;

  1114.         s->m.height= height;

  1115.         s->m.mb_width= block_width;

  1116.         s->m.mb_height= block_height;

  1117.         s->m.mb_stride= s->m.mb_width+1;

  1118.         s->m.b8_stride= 2*s->m.mb_width+1;

  1119.         s->m.f_code=1;

  1120.         s->m.pict_type= s->picture.pict_type;

  1121.         s->m.qscale= s->picture.quality/FF_QP2LAMBDA;

  1122.         s->m.me_method= s->avctx->me_method;

  1123.         

  1124.         if(!s->motion_val8[plane]){

  1125.             s->motion_val8 [plane]= av_mallocz((s->m.b8_stride*block_height*2 + 2)*2*sizeof(int16_t));

  1126.             s->motion_val16[plane]= av_mallocz((s->m.mb_stride*(block_height + 2) + 1)*2*sizeof(int16_t));

  1127.         }

  1128. 

  1129.         s->m.mb_type= s->mb_type;

  1130.         

  1131.         //dummies, to avoid segfaults

  1132.         s->m.current_picture.mb_mean=   (uint8_t *)s->dummy;

  1133.         s->m.current_picture.mb_var=    (uint16_t*)s->dummy;

  1134.         s->m.current_picture.mc_mb_var= (uint16_t*)s->dummy;

  1135.         s->m.current_picture.mb_type= s->dummy;

  1136.         

  1137.         s->m.current_picture.motion_val[0]= s->motion_val8[plane] + 2;

  1138.         s->m.p_mv_table= s->motion_val16[plane] + s->m.mb_stride + 1;

  1139.         s->m.dsp= s->dsp; //move

  1140.         ff_init_me(&s->m);

  1141.     

  1142.         s->m.me.dia_size= s->avctx->dia_size;

  1143.         s->m.first_slice_line=1;

  1144.         for (y = 0; y < block_height; y++) {

  1145.             uint8_t src[stride*16];

  1146.             

  1147.             s->m.new_picture.data[0]= src - y*16*stride; //ugly

  1148.             s->m.mb_y= y;

  1149.     

  1150.             for(i=0; i<16 && i + 16*y<height; i++){

  1151.                 memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);

  1152.                 for(x=width; x<16*block_width; x++)

  1153.                     src[i*stride+x]= src[i*stride+x-1];

  1154.             }

  1155.             for(; i<16 && i + 16*y<16*block_height; i++)

  1156.                 memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);

  1157.     

  1158.             for (x = 0; x < block_width; x++) {

  1159.                 s->m.mb_x= x;

  1160.                 ff_init_block_index(&s->m);

  1161.                 ff_update_block_index(&s->m);

  1162.                 

  1163.                 ff_estimate_p_frame_motion(&s->m, x, y);

  1164.             }

  1165.             s->m.first_slice_line=0;

  1166.         }

  1167.     

  1168.         ff_fix_long_p_mvs(&s->m);

  1169.         ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code, CANDIDATE_MB_TYPE_INTER, 0);

  1170.     }

  1171.         

  1172.     s->m.first_slice_line=1;

  1173.     for (y = 0; y < block_height; y++) {

  1174.         uint8_t src[stride*16];

  1175.         

  1176.         for(i=0; i<16 && i + 16*y<height; i++){

  1177.             memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);

  1178.             for(x=width; x<16*block_width; x++)

  1179.                 src[i*stride+x]= src[i*stride+x-1];

  1180.         }

  1181.         for(; i<16 && i + 16*y<16*block_height; i++)

  1182.             memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);

  1183. 

  1184.         s->m.mb_y= y;

  1185.         for (x = 0; x < block_width; x++) {

  1186.             uint8_t reorder_buffer[3][6][7*32];

  1187.             int count[3][6];

  1188.             int offset = y * 16 * stride + x * 16;

  1189.             uint8_t *decoded= decoded_plane + offset;

  1190.             uint8_t *ref= ref_plane + offset;

  1191.             int score[4]={0,0,0,0}, best;

  1192.             uint8_t temp[16*stride];

  1193.             

  1194.             if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < 3000){ //FIXME check size

  1195.                 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");

  1196.                 return -1;

  1197.             }

  1198. 

  1199.             s->m.mb_x= x;

  1200.             ff_init_block_index(&s->m);

  1201.             ff_update_block_index(&s->m);

  1202.             

  1203.             if(s->picture.pict_type == I_TYPE || (s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTRA)){

  1204.                 for(i=0; i<6; i++){

  1205.                     init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i], 7*32);

  1206.                 }

  1207.                 if(s->picture.pict_type == P_TYPE){

  1208.                     const uint8_t *vlc= svq1_block_type_vlc[SVQ1_BLOCK_INTRA];

  1209.                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);

  1210.                     score[0]= vlc[1]*lambda;

  1211.                 }

  1212.                 score[0]+= encode_block(s, src+16*x, NULL, temp, stride, 5, 64, lambda, 1);

  1213.                 for(i=0; i<6; i++){

  1214.                     count[0][i]= put_bits_count(&s->reorder_pb[i]);

  1215.                     flush_put_bits(&s->reorder_pb[i]);

  1216.                 }

  1217.             }else

  1218.                 score[0]= INT_MAX;

  1219.             

  1220.             best=0;

  1221.             

  1222.             if(s->picture.pict_type == P_TYPE){

  1223.                 const uint8_t *vlc= svq1_block_type_vlc[SVQ1_BLOCK_INTER];

  1224.                 int mx, my, pred_x, pred_y, dxy;

  1225.                 int16_t *motion_ptr;

  1226. 

  1227.                 motion_ptr= h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);

  1228.                 if(s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTER){

  1229.                     for(i=0; i<6; i++)

  1230.                         init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i], 7*32);

  1231. 

  1232.                     put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);

  1233.     

  1234.                     s->m.pb= s->reorder_pb[5];                

  1235.                     mx= motion_ptr[0];

  1236.                     my= motion_ptr[1];

  1237.                     assert(mx>=-32 && mx<=31);

  1238.                     assert(my>=-32 && my<=31);

  1239.                     assert(pred_x>=-32 && pred_x<=31);

  1240.                     assert(pred_y>=-32 && pred_y<=31);

  1241.                     ff_h263_encode_motion(&s->m, mx - pred_x, 1);

  1242.                     ff_h263_encode_motion(&s->m, my - pred_y, 1);

  1243.                     s->reorder_pb[5]= s->m.pb;

  1244.                     score[1] += lambda*put_bits_count(&s->reorder_pb[5]);

  1245.     

  1246.                     dxy= (mx&1) + 2*(my&1);

  1247.                     

  1248.                     s->dsp.put_pixels_tab[0][dxy](temp+16, ref + (mx>>1) + stride*(my>>1), stride, 16);

  1249.                     

  1250.                     score[1]+= encode_block(s, src+16*x, temp+16, decoded, stride, 5, 64, lambda, 0);

  1251.                     best= score[1] <= score[0];

  1252. 

  1253.                     vlc= svq1_block_type_vlc[SVQ1_BLOCK_SKIP];

  1254.                     score[2]= s->dsp.sse[0](NULL, src+16*x, ref, stride, 16);

  1255.                     score[2]+= vlc[1]*lambda;

  1256.                     if(score[2] < score[best] && mx==0 && my==0){

  1257.                         best=2;

  1258.                         s->dsp.put_pixels_tab[0][0](decoded, ref, stride, 16);

  1259.                         for(i=0; i<6; i++){

  1260.                             count[2][i]=0;

  1261.                         }

  1262.                         put_bits(&s->pb, vlc[1], vlc[0]);

  1263.                     }

  1264.                 }

  1265. 

  1266.                 if(best==1){

  1267.                     for(i=0; i<6; i++){

  1268.                         count[1][i]= put_bits_count(&s->reorder_pb[i]);

  1269.                         flush_put_bits(&s->reorder_pb[i]);

  1270.                     }

  1271.                 }else{

  1272.                     motion_ptr[0                 ] = motion_ptr[1                 ]=

  1273.                     motion_ptr[2                 ] = motion_ptr[3                 ]=

  1274.                     motion_ptr[0+2*s->m.b8_stride] = motion_ptr[1+2*s->m.b8_stride]=

  1275.                     motion_ptr[2+2*s->m.b8_stride] = motion_ptr[3+2*s->m.b8_stride]=0;

  1276.                 }

  1277.             }

  1278.                 

  1279.             s->rd_total += score[best];

  1280. 

  1281.             for(i=5; i>=0; i--){

  1282.                 ff_copy_bits(&s->pb, reorder_buffer[best][i], count[best][i]);

  1283.             }

  1284.             if(best==0){

  1285.                 s->dsp.put_pixels_tab[0][0](decoded, temp, stride, 16);

  1286.             }

  1287.         }

  1288.         s->m.first_slice_line=0;

  1289.     }

  1290.     return 0;

  1291. }

  1292. 

  1293. static int svq1_encode_init(AVCodecContext *avctx)

  1294. {

  1295.     SVQ1Context * const s = avctx->priv_data;

  1296. 

  1297.     dsputil_init(&s->dsp, avctx);

  1298.     avctx->coded_frame= (AVFrame*)&s->picture;

  1299. 

  1300.     s->frame_width = avctx->width;

  1301.     s->frame_height = avctx->height;

  1302. 

  1303.     s->y_block_width = (s->frame_width + 15) / 16;

  1304.     s->y_block_height = (s->frame_height + 15) / 16;

  1305. 

  1306.     s->c_block_width = (s->frame_width / 4 + 15) / 16;

  1307.     s->c_block_height = (s->frame_height / 4 + 15) / 16;

  1308. 

  1309.     s->avctx= avctx;

  1310.     s->m.avctx= avctx;

  1311.     s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t)); 

  1312.     s->m.me.map       = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));

  1313.     s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));

  1314.     s->mb_type        = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int16_t));

  1315.     s->dummy          = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int32_t));

  1316.     h263_encode_init(&s->m); //mv_penalty

  1317.     

  1318.     return 0;

  1319. }

  1320. 

  1321. static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf, 

  1322.     int buf_size, void *data)

  1323. {

  1324.     SVQ1Context * const s = avctx->priv_data;

  1325.     AVFrame *pict = data;

  1326.     AVFrame * const p= (AVFrame*)&s->picture;

  1327.     AVFrame temp;

  1328.     int i;

  1329. 

  1330.     if(avctx->pix_fmt != PIX_FMT_YUV410P){

  1331.         av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");

  1332.         return -1;

  1333.     }

  1334.     

  1335.     if(!s->current_picture.data[0]){

  1336.         avctx->get_buffer(avctx, &s->current_picture);

  1337.         avctx->get_buffer(avctx, &s->last_picture);

  1338.     }

  1339.     

  1340.     temp= s->current_picture;

  1341.     s->current_picture= s->last_picture;

  1342.     s->last_picture= temp;

  1343.     

  1344.     init_put_bits(&s->pb, buf, buf_size);

  1345. 

  1346.     *p = *pict;

  1347.     p->pict_type = avctx->frame_number % avctx->gop_size ? P_TYPE : I_TYPE;

  1348.     p->key_frame = p->pict_type == I_TYPE;

  1349. 

  1350.     svq1_write_header(s, p->pict_type);

  1351.     for(i=0; i<3; i++){

  1352.         if(svq1_encode_plane(s, i,

  1353.             s->picture.data[i], s->last_picture.data[i], s->current_picture.data[i],

  1354.             s->frame_width / (i?4:1), s->frame_height / (i?4:1), 

  1355.             s->picture.linesize[i], s->current_picture.linesize[i]) < 0)

  1356.                 return -1;

  1357.     }

  1358. 

  1359. //    align_put_bits(&s->pb);

  1360.     while(put_bits_count(&s->pb) & 31)

  1361.         put_bits(&s->pb, 1, 0);

  1362.         

  1363.     flush_put_bits(&s->pb);

  1364. 

  1365.     return (put_bits_count(&s->pb) / 8);

  1366. }

  1367. 

  1368. static int svq1_encode_end(AVCodecContext *avctx)

  1369. {

  1370.     SVQ1Context * const s = avctx->priv_data;

  1371.     int i;

  1372. 

  1373.     av_log(avctx, AV_LOG_DEBUG, "RD: %f\n", s->rd_total/(double)(avctx->width*avctx->height*avctx->frame_number));

  1374.     

  1375.     av_freep(&s->m.me.scratchpad);     

  1376.     av_freep(&s->m.me.map);

  1377.     av_freep(&s->m.me.score_map);

  1378.     av_freep(&s->mb_type);

  1379.     av_freep(&s->dummy);

  1380. 

  1381.     for(i=0; i<3; i++){

  1382.         av_freep(&s->motion_val8[i]);

  1383.         av_freep(&s->motion_val16[i]);

  1384.     }

  1385. 

  1386.     return 0;

  1387. }

  1388. 

  1389. #endif //CONFIG_ENCODERS

  1390. 

  1391. AVCodec svq1_decoder = {

  1392.     "svq1",

  1393.     CODEC_TYPE_VIDEO,

  1394.     CODEC_ID_SVQ1,

  1395.     sizeof(MpegEncContext),

  1396.     svq1_decode_init,

  1397.     NULL,

  1398.     svq1_decode_end,

  1399.     svq1_decode_frame,

  1400.     CODEC_CAP_DR1,

  1401.     .flush= ff_mpeg_flush,

  1402.     .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV410P, -1},

  1403. };

  1404. 

  1405. #ifdef CONFIG_ENCODERS

  1406. 

  1407. AVCodec svq1_encoder = {

  1408.     "svq1",

  1409.     CODEC_TYPE_VIDEO,

  1410.     CODEC_ID_SVQ1,

  1411.     sizeof(SVQ1Context),

  1412.     svq1_encode_init,

  1413.     svq1_encode_frame,

  1414.     svq1_encode_end,

  1415.     .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV410P, -1},

  1416. };

  1417. 

  1418. #endif //CONFIG_ENCODERS