/* * * HuffYUV Decoder for Mplayer * (c) 2002 Roberto Togni * * Fourcc: HFYU * * Original Win32 codec copyright: * *** Huffyuv v2.1.1, by Ben Rudiak-Gould. *** http://www.math.berkeley.edu/~benrg/huffyuv.html *** *** This file is copyright 2000 Ben Rudiak-Gould, and distributed under *** the terms of the GNU General Public License, v2 or later. See *** http://www.gnu.org/copyleft/gpl.html. * */ #include #include #include "config.h" #include "mp_msg.h" #include "vd_internal.h" static vd_info_t info = { "HuffYUV Video decoder", "huffyuv", "Roberto Togni", "Roberto Togni, original win32 by Ben Rudiak-Gould http://www.math.berkeley.edu/~benrg/huffyuv.html", "native codec" }; LIBVD_EXTERN(huffyuv) /* * Bitmap types */ #define BMPTYPE_YUV -1 #define BMPTYPE_RGB -2 #define BMPTYPE_RGBA -3 /* * Compression methods */ #define METHOD_LEFT 0 #define METHOD_GRAD 1 #define METHOD_MEDIAN 2 #define DECORR_FLAG 64 #define METHOD_LEFT_DECORR (METHOD_LEFT | DECORR_FLAG) #define METHOD_GRAD_DECORR (METHOD_GRAD | DECORR_FLAG) #define METHOD_OLD -2 #define FOURCC_HFYU mmioFOURCC('H','F','Y','U') #define HUFFTABLE_CLASSIC_YUV ((unsigned char*) -1) #define HUFFTABLE_CLASSIC_RGB ((unsigned char*) -2) #define HUFFTABLE_CLASSIC_YUV_CHROMA ((unsigned char*) -3) /* * Huffman table */ typedef struct { unsigned char* table_pointers[32]; unsigned char table_data[129*25]; } DecodeTable; /* * Decoder context */ typedef struct { // Real image depth int bitcount; // Prediction method int method; // Bitmap color type int bitmaptype; // Interlaced flag int interlaced; // Huffman tables unsigned char decode1_shift[256]; unsigned char decode2_shift[256]; unsigned char decode3_shift[256]; DecodeTable decode1, decode2, decode3; // Above line buffers unsigned char *abovebuf1, *abovebuf2; } huffyuv_context_t; /* * Classic Huffman tables */ unsigned char classic_shift_luma[] = { 34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8, 16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70, 69,68, 0 }; unsigned char classic_shift_chroma[] = { 66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183, 56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119, 214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0 }; unsigned char classic_add_luma[256] = { 3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37, 73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36, 68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36, 35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39, 37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37, 35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29, 27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16, 15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14, 12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6, 12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15, 18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25, 28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49, 28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60, 62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52, 54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43, 46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8, }; unsigned char classic_add_chroma[256] = { 3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9, 7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7, 11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77, 43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63, 143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22, 17, 14, 5, 6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111, 112,113,114,115, 4,117,118, 92, 94,121,122, 3,124,103, 2, 1, 0,129,130,131,120,119,126,125,136,137,138,139,140,141,142,134, 135,132,133,104, 64,101, 62, 57,102, 95, 93, 59, 61, 28, 97, 96, 52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41, 19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36, 7,128,127,105,123,116, 35, 34, 33,145, 31, 79, 42,146, 78, 26, 83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13, 14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8, 6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2, }; /* * Internal function prototypes */ unsigned char* InitializeDecodeTable(unsigned char* hufftable, unsigned char* shift, DecodeTable* decode_table); unsigned char* InitializeShiftAddTables(unsigned char* hufftable, unsigned char* shift, unsigned* add_shifted); unsigned char* DecompressHuffmanTable(unsigned char* hufftable, unsigned char* dst); unsigned char huff_decompress(unsigned int* in, unsigned int *pos, DecodeTable *decode_table, unsigned char *decode_shift); // to set/get/query special features/parameters static int control(sh_video_t *sh,int cmd,void* arg,...) { switch(cmd) { case VDCTRL_QUERY_FORMAT: if (((huffyuv_context_t *)(sh->context))->bitmaptype == BMPTYPE_YUV) { if (*((int*)arg) == IMGFMT_YUY2) return CONTROL_TRUE; else return CONTROL_FALSE; } else { if ((*((int*)arg) == IMGFMT_BGR32) || (*((int*)arg) == IMGFMT_BGR24)) return CONTROL_TRUE; else return CONTROL_FALSE; } } return CONTROL_UNKNOWN; } /* * * Init HuffYUV decoder * */ static int init(sh_video_t *sh) { int vo_ret; // Video output init ret value huffyuv_context_t *hc; // Decoder context unsigned char *hufftable; // Compressed huffman tables BITMAPINFOHEADER *bih = sh->bih; if ((hc = malloc(sizeof(huffyuv_context_t))) == NULL) { mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Can't allocate memory for HuffYUV decoder context\n"); return 0; } sh->context = (void *)hc; if (bih->biCompression != FOURCC_HFYU) { mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[HuffYUV] BITMAPHEADER fourcc != HFYU\n"); return 0; } /* Get bitcount */ hc->bitcount = 0; if (bih->biSize > sizeof(BITMAPINFOHEADER)+1) hc->bitcount = *((char*)bih + sizeof(BITMAPINFOHEADER) + 1); if (hc->bitcount == 0) hc->bitcount = bih->biBitCount; /* Get bitmap type */ switch (hc->bitcount & ~7) { case 16: hc->bitmaptype = BMPTYPE_YUV; // -1 mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Image type is YUV\n"); break; case 24: hc->bitmaptype = BMPTYPE_RGB; // -2 mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Image type is RGB\n"); break; case 32: hc->bitmaptype = BMPTYPE_RGBA; //-3 mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Image type is RGBA\n"); break; default: hc->bitmaptype = 0; // ERR mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[HuffYUV] Image type is unknown\n"); } /* Get method */ switch (bih->biBitCount & 7) { case 0: if (bih->biSize > sizeof(BITMAPINFOHEADER)) { hc->method = *((unsigned char*)bih + sizeof(BITMAPINFOHEADER)); mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method stored in extra data\n"); } else hc->method = METHOD_OLD; // Is it really needed? break; case 1: hc->method = METHOD_LEFT; break; case 2: hc->method = METHOD_LEFT_DECORR; break; case 3: if (hc->bitmaptype == BMPTYPE_YUV) { hc->method = METHOD_GRAD; } else { hc->method = METHOD_GRAD_DECORR; } break; case 4: hc->method = METHOD_MEDIAN; break; default: mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: fallback to METHOD_OLD\n"); hc->method = METHOD_OLD; } /* Print method info */ switch (hc->method) { case METHOD_LEFT: mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: Predict Left\n"); break; case METHOD_GRAD: mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: Predict Gradient\n"); break; case METHOD_MEDIAN: mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: Predict Median\n"); break; case METHOD_LEFT_DECORR: mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: Predict Left with decorrelation\n"); break; case METHOD_GRAD_DECORR: mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: Predict Gradient with decorrelation\n"); break; case METHOD_OLD: mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method Old\n"); break; default: mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[HuffYUV] Method unknown\n"); } /* Take care of interlaced images */ hc->interlaced = 0; if (bih->biHeight > 288) { // Image is interlaced (flag != 0), but we may not care hc->interlaced = 1; mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Image is interlaced\n"); } /* Allocate buffers */ hc->abovebuf1 = NULL; hc->abovebuf2 = NULL; if ((hc->method == METHOD_MEDIAN) || (hc->method == METHOD_GRAD) || (hc->method == METHOD_GRAD_DECORR)) { // If inetrlaced flag will be 2 (hc->interlaced)++; mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Allocating above line buffer\n"); if ((hc->abovebuf1 = malloc(sizeof(char) * 4 * bih->biWidth * hc->interlaced)) == NULL) { mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Can't allocate memory for HuffYUV above buffer 1\n"); return 0; } if ((hc->abovebuf2 = malloc(sizeof(char) * 4 * bih->biWidth * hc->interlaced)) == NULL) { mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Can't allocate memory for HuffYUV above buffer 2\n"); return 0; } } /* Get compressed Huffman tables */ if (bih->biSize == sizeof(BITMAPINFOHEADER) /*&& !(bih->biBitCount&7)*/) { hufftable = (hc->bitmaptype == BMPTYPE_YUV) ? HUFFTABLE_CLASSIC_YUV : HUFFTABLE_CLASSIC_RGB; mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Using classic static Huffman tables\n"); } else { hufftable = (unsigned char*)bih + sizeof(BITMAPINFOHEADER) + ((bih->biBitCount&7) ? 0 : 4); mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Using Huffman tables stored in file\n"); } /* Initialize decoder Huffman tables */ hufftable = InitializeDecodeTable(hufftable, hc->decode1_shift, &(hc->decode1)); hufftable = InitializeDecodeTable(hufftable, hc->decode2_shift, &(hc->decode2)); InitializeDecodeTable(hufftable, hc->decode3_shift, &(hc->decode3)); /* * Initialize video output device */ switch (hc->bitmaptype) { case BMPTYPE_YUV: vo_ret = mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_YUY2); break; case BMPTYPE_RGB: vo_ret = mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_BGR24); break; case BMPTYPE_RGBA: mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[HuffYUV] RGBA not supported yet.\n"); return 0; default: mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[HuffYUV] BUG! Unknown bitmaptype in vo config.\n"); return 0; } return vo_ret; } /* * * Uninit HuffYUV decoder * */ static void uninit(sh_video_t *sh) { if (sh->context) { if (((huffyuv_context_t*)&sh->context)->abovebuf1) free(((huffyuv_context_t*)sh->context)->abovebuf1); if (((huffyuv_context_t*)&sh->context)->abovebuf2) free(((huffyuv_context_t*)sh->context)->abovebuf2); free(sh->context); } } #define HUFF_DECOMPRESS_YUYV() \ { \ y1 = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode1), hc->decode1_shift); \ u = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode2), hc->decode2_shift); \ y2 = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode1), hc->decode1_shift); \ v = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode3), hc->decode3_shift); \ } #define HUFF_DECOMPRESS_RGB_DECORR() \ { \ g = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode2), hc->decode2_shift); \ b = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode1), hc->decode1_shift); \ r = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode3), hc->decode3_shift); \ } #define HUFF_DECOMPRESS_RGB() \ { \ b = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode1), hc->decode1_shift); \ g = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode2), hc->decode2_shift); \ r = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode3), hc->decode3_shift); \ } #define MEDIAN(left, above, aboveleft) \ { \ if ((mi = (above)) > (left)) { \ mx = mi; \ mi = (left); \ } else \ mx = (left); \ tmp = (above) + (left) - (aboveleft); \ if (tmp < mi) \ med = mi; \ else if (tmp > mx) \ med = mx; \ else \ med = tmp; \ } #define YUV_STORE1ST_ABOVEBUF() \ { \ abovebuf[0] = outptr[0] = encoded[0]; \ abovebuf[1] = left_u = outptr[1] = encoded[1]; \ abovebuf[2] = left_y = outptr[2] = encoded[2]; \ abovebuf[3] = left_v = outptr[3] = encoded[3]; \ pixel_ptr = 4; \ } #define YUV_STORE1ST() \ { \ outptr[0] = encoded[0]; \ left_u = outptr[1] = encoded[1]; \ left_y = outptr[2] = encoded[2]; \ left_v = outptr[3] = encoded[3]; \ pixel_ptr = 4; \ } #define RGB_STORE1ST() \ { \ pixel_ptr = (height-1)*mpi->stride[0]; \ left_b = outptr[pixel_ptr++] = encoded[1]; \ left_g = outptr[pixel_ptr++] = encoded[2]; \ left_r = outptr[pixel_ptr++] = encoded[3]; \ pixel_ptr += bgr32; \ } #define RGB_STORE1ST_ABOVEBUF() \ { \ pixel_ptr = (height-1)*mpi->stride[0]; \ abovebuf[0] = left_b = outptr[pixel_ptr++] = encoded[1]; \ abovebuf[1] = left_g = outptr[pixel_ptr++] = encoded[2]; \ abovebuf[2] = left_r = outptr[pixel_ptr++] = encoded[3]; \ pixel_ptr += bgr32; \ } #define YUV_PREDLEFT() \ { \ outptr[pixel_ptr++] = left_y += y1; \ outptr[pixel_ptr++] = left_u += u; \ outptr[pixel_ptr++] = left_y += y2; \ outptr[pixel_ptr++] = left_v += v; \ } #define YUV_PREDLEFT_BUF(buf, offs) \ { \ (buf)[(offs)] = outptr[pixel_ptr++] = left_y += y1; \ (buf)[(offs)+1] = outptr[pixel_ptr++] = left_u += u; \ (buf)[(offs)+2] = outptr[pixel_ptr++] = left_y += y2; \ (buf)[(offs)+3] = outptr[pixel_ptr++] = left_v += v; \ } #define YUV_PREDMED() \ { \ MEDIAN (left_y, abovebuf[col], abovebuf[col-2]); \ curbuf[col] = outptr[pixel_ptr++] = left_y = med + y1; \ MEDIAN (left_u, abovebuf[col+1], abovebuf[col+1-4]); \ curbuf[col+1] = outptr[pixel_ptr++] = left_u = med + u; \ MEDIAN (left_y, abovebuf[col+2], abovebuf[col+2-2]); \ curbuf[col+2] = outptr[pixel_ptr++] = left_y = med + y2; \ MEDIAN (left_v, abovebuf[col+3], abovebuf[col+3-4]); \ curbuf[col+3] = outptr[pixel_ptr++] = left_v = med + v; \ } #define YUV_PREDMED_1ST() \ { \ MEDIAN (left_y, abovebuf[0], curbuf[width2*4-2]); \ curbuf[0] = outptr[pixel_ptr++] = left_y = med + y1; \ MEDIAN (left_u, abovebuf[1], curbuf[width2*4+1-4]); \ curbuf[1] = outptr[pixel_ptr++] = left_u = med + u; \ MEDIAN (left_y, abovebuf[2], abovebuf[0]); \ curbuf[2] = outptr[pixel_ptr++] = left_y = med + y2; \ MEDIAN (left_v, abovebuf[3], curbuf[width2*4+3-4]); \ curbuf[3] = outptr[pixel_ptr++] = left_v = med + v; \ } #define YUV_PREDGRAD() \ { \ curbuf[col] = outptr[pixel_ptr++] = left_y += y1 + abovebuf[col]-abovebuf[col-2]; \ curbuf[col+1] = outptr[pixel_ptr++] = left_u += u + abovebuf[col+1]-abovebuf[col+1-4]; \ curbuf[col+2] = outptr[pixel_ptr++] = left_y += y2 + abovebuf[col+2]-abovebuf[col+2-2]; \ curbuf[col+3] = outptr[pixel_ptr++] = left_v += v + abovebuf[col+3]-abovebuf[col+3-4]; \ } #define YUV_PREDGRAD_1ST() \ { \ curbuf[0] = outptr[pixel_ptr++] = left_y += y1 + abovebuf[0] - curbuf[width2*4-2]; \ curbuf[1] = outptr[pixel_ptr++] = left_u += u + abovebuf[1] - curbuf[width2*4+1-4]; \ curbuf[2] = outptr[pixel_ptr++] = left_y += y2 + abovebuf[2] - abovebuf[0]; \ curbuf[3] = outptr[pixel_ptr++] = left_v += v + abovebuf[3] - curbuf[width2*4+3-4]; \ } #define RGB_PREDLEFT_DECORR() \ { \ outptr[pixel_ptr++] = left_b += b + g; \ outptr[pixel_ptr++] = left_g += g; \ outptr[pixel_ptr++] = left_r += r + g; \ pixel_ptr += bgr32; \ } #define RGB_PREDLEFT_DECORR_BUF() \ { \ abovebuf[col] = outptr[pixel_ptr++] = left_b += b + g; \ abovebuf[col+1] = outptr[pixel_ptr++] = left_g += g; \ abovebuf[col+2] = outptr[pixel_ptr++] = left_r += r + g; \ pixel_ptr += bgr32; \ } #define RGB_PREDLEFT() \ { \ outptr[pixel_ptr++] = left_b += b; \ outptr[pixel_ptr++] = left_g += g; \ outptr[pixel_ptr++] = left_r += r; \ pixel_ptr += bgr32; \ } #define RGB_PREDGRAD_DECORR() \ { \ curbuf[col] = outptr[pixel_ptr++] = left_b += b + g + abovebuf[col]-abovebuf[col-3]; \ curbuf[col+1] = outptr[pixel_ptr++] = left_g += g + abovebuf[col+1]-abovebuf[col+1-3]; \ curbuf[col+2] = outptr[pixel_ptr++] = left_r += r + g + abovebuf[col+2]-abovebuf[col+2-3]; \ pixel_ptr += bgr32; \ } #define RGB_PREDGRAD_DECORR_1ST() \ { \ curbuf[0] = outptr[pixel_ptr++] = left_b += b + g + abovebuf[0] - curbuf[width2*3-3]; \ curbuf[1] = outptr[pixel_ptr++] = left_g += g + abovebuf[1] - curbuf[width2*3+1-3]; \ curbuf[2] = outptr[pixel_ptr++] = left_r += r + g + abovebuf[2] - curbuf[width2*3+2-3]; \ pixel_ptr += bgr32; \ } #define SWAPBUF() \ { \ swap = abovebuf; \ abovebuf = curbuf; \ curbuf = swap; \ } /* * * Decode a HuffYUV frame * */ static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags) { mp_image_t* mpi; int pixel_ptr; unsigned char y1, y2, u, v, r, g, b/*, a*/; unsigned char left_y, left_u, left_v, left_r, left_g, left_b; unsigned char tmp, mi, mx, med; unsigned char *swap; int row, col; unsigned int pos = 32; unsigned char *encoded = (unsigned char *)data; huffyuv_context_t *hc = (huffyuv_context_t *) sh->context; // Decoder context unsigned char *abovebuf = hc->abovebuf1; unsigned char *curbuf = hc->abovebuf2; unsigned char *outptr; int width = sh->disp_w; // Real image width int height = sh->disp_h; // Real image height int width2, height2; int bgr32; int interlaced, oddlines; // Skipped frame if(len <= 0) return NULL; /* If image is interlaced and we care about it fix size */ if (hc->interlaced == 2) { width2 = width*2; // Double image width height2 = height/2; // Half image height oddlines = height%2; // Set if line number is odd interlaced = 1; // Used also for row counter computation, must be exactly 1 } else { width2 = width; // Real image width height2 = height; // Real image height interlaced = 0; // Flag is 0: no need to deinterlaced image oddlines = 0; // Don't care about odd line number if not interlaced } /* Get output image buffer */ mpi=mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE, sh->disp_w, sh->disp_h); if (!mpi) { mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Can't allocate mpi image for huffyuv codec.\n"); return NULL; } outptr = mpi->planes[0]; // Output image pointer if (hc->bitmaptype == BMPTYPE_YUV) { width >>= 1; // Each cycle stores two pixels width2 >>= 1; if (hc->method == METHOD_GRAD) { /* * YUV predict gradient */ /* Store 1st pixel */ YUV_STORE1ST_ABOVEBUF(); // Decompress 1st row (always stored with left prediction) for (col = 1*4; col < width*4; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDLEFT_BUF (abovebuf, col); } if (interlaced) { pixel_ptr = mpi->stride[0]; for (col = width*4; col < width*8; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDLEFT_BUF (abovebuf, col); } } curbuf[width2*4-1] = curbuf[width2*4-2] = curbuf[width2*4-3] = 0; for (row = 1; row < height2; row++) { pixel_ptr = (interlaced + 1) * row * mpi->stride[0]; HUFF_DECOMPRESS_YUYV(); YUV_PREDGRAD_1ST(); for (col = 1*4; col < width*4; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDGRAD(); } if (interlaced) { pixel_ptr = (2 * row + 1) * mpi->stride[0]; for (col = width*4; col < width*8; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDGRAD(); } } SWAPBUF(); } if (oddlines) { pixel_ptr = 2 * height * mpi->stride[0]; HUFF_DECOMPRESS_YUYV(); YUV_PREDGRAD_1ST(); for (col = 1*4; col < width*4; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDGRAD(); } } } else if (hc->method == METHOD_MEDIAN) { /* * YUV predict median */ /* Store 1st pixel */ YUV_STORE1ST_ABOVEBUF(); // Decompress 1st row (always stored with left prediction) for (col = 1*4; col < width*4; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDLEFT_BUF (abovebuf, col); } if (interlaced) { pixel_ptr = mpi->stride[0]; for (col = width*4; col < width*8; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDLEFT_BUF (abovebuf, col); } } // Decompress 1st two pixels of 2nd row pixel_ptr = mpi->stride[0] * (interlaced + 1); HUFF_DECOMPRESS_YUYV(); YUV_PREDLEFT_BUF (curbuf, 0); HUFF_DECOMPRESS_YUYV(); YUV_PREDLEFT_BUF (curbuf, 4); // Complete 2nd row for (col = 2*4; col < width*4; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDMED(); } if (interlaced) { pixel_ptr = mpi->stride[0] * 3; for (col = width*4; col < width*8; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDMED(); } } SWAPBUF(); for (row = 2; row < height2; row++) { pixel_ptr = (interlaced + 1) * row * mpi->stride[0]; HUFF_DECOMPRESS_YUYV(); YUV_PREDMED_1ST(); for (col = 1*4; col < width*4; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDMED(); } if (interlaced) { pixel_ptr = (2 * row + 1) * mpi->stride[0]; for (col = width*4; col < width*8; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDMED(); } } SWAPBUF(); } if (oddlines) { pixel_ptr = 2 * height2 * mpi->stride[0]; HUFF_DECOMPRESS_YUYV(); YUV_PREDMED_1ST(); for (col = 1*4; col < width*4; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDMED(); } } } else { /* * YUV predict left and predict old */ /* Store 1st pixel */ YUV_STORE1ST(); // Decompress 1st row (always stored with left prediction) for (col = 1*4; col < width*4; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDLEFT(); } for (row = 1; row < height; row++) { pixel_ptr = row * mpi->stride[0]; for (col = 0; col < width*4; col += 4) { HUFF_DECOMPRESS_YUYV(); YUV_PREDLEFT(); } } } } else { bgr32 = (mpi->bpp) >> 5; // 1 if bpp = 32, 0 if bpp = 24 if (hc->method == METHOD_LEFT_DECORR) { /* * RGB predict left with decorrelation */ /* Store 1st pixel */ RGB_STORE1ST(); // Decompress 1st row for (col = 1; col < width; col ++) { HUFF_DECOMPRESS_RGB_DECORR(); RGB_PREDLEFT_DECORR(); } for (row = 1; row < height; row++) { pixel_ptr = (height - row - 1) * mpi->stride[0]; for (col = 0; col < width; col++) { HUFF_DECOMPRESS_RGB_DECORR(); RGB_PREDLEFT_DECORR(); } } } else if (hc->method == METHOD_GRAD_DECORR) { /* * RGB predict gradient with decorrelation */ /* Store 1st pixel */ RGB_STORE1ST_ABOVEBUF(); // Decompress 1st row (always stored with left prediction) for (col = 1*3; col < width*3; col += 3) { HUFF_DECOMPRESS_RGB_DECORR(); RGB_PREDLEFT_DECORR_BUF(); } if (interlaced) { pixel_ptr = (height-2)*mpi->stride[0]; for (col = width*3; col < width*6; col += 3) { HUFF_DECOMPRESS_RGB_DECORR(); RGB_PREDLEFT_DECORR_BUF(); } } curbuf[width2*3-1] = curbuf[width2*3-2] = curbuf[width2*3-3] = 0; for (row = 1; row < height2; row++) { pixel_ptr = (height - (interlaced + 1) * row - 1) * mpi->stride[0]; HUFF_DECOMPRESS_RGB_DECORR(); RGB_PREDGRAD_DECORR_1ST(); for (col = 1*3; col < width*3; col += 3) { HUFF_DECOMPRESS_RGB_DECORR(); RGB_PREDGRAD_DECORR(); } if (interlaced) { pixel_ptr = (height - 2 * row - 2) * mpi->stride[0]; for (col = width*3; col < width*6; col += 3) { HUFF_DECOMPRESS_RGB_DECORR(); RGB_PREDGRAD_DECORR(); } } SWAPBUF(); } if (oddlines) { pixel_ptr = mpi->stride[0]; HUFF_DECOMPRESS_RGB_DECORR(); RGB_PREDGRAD_DECORR_1ST(); for (col = 1*3; col < width*3; col += 3) { HUFF_DECOMPRESS_RGB_DECORR(); RGB_PREDGRAD_DECORR(); } } } else { /* * RGB predict left (no decorrelation) and predict old */ /* Store 1st pixel */ RGB_STORE1ST(); // Decompress 1st row for (col = 1; col < width; col++) { HUFF_DECOMPRESS_RGB(); RGB_PREDLEFT(); } for (row = 1; row < height; row++) { pixel_ptr = (height - row - 1) * mpi->stride[0]; for (col = 0; col < width; col++) { HUFF_DECOMPRESS_RGB(); RGB_PREDLEFT(); } } } } return mpi; } unsigned char* InitializeDecodeTable(unsigned char* hufftable, unsigned char* shift, DecodeTable* decode_table) { unsigned int add_shifted[256]; char code_lengths[256]; char code_firstbits[256]; char table_lengths[32]; int all_zero_code=-1; int i, j, k; int firstbit, length, val; unsigned char* p; unsigned char * table; /* Initialize shift[] and add_shifted[] */ hufftable = InitializeShiftAddTables(hufftable, shift, add_shifted); memset(table_lengths, -1, 32); /* Fill code_firstbits[], code_legths[] and table_lengths[] */ for (i = 0; i < 256; ++i) { if (add_shifted[i]) { for (firstbit = 31; firstbit >= 0; firstbit--) { if (add_shifted[i] & (1 << firstbit)) { code_firstbits[i] = firstbit; length = shift[i] - (32 - firstbit); code_lengths[i] = length; table_lengths[firstbit] = max(table_lengths[firstbit], length); break; } } } else { all_zero_code = i; } } p = decode_table->table_data; *p++ = 31; *p++ = all_zero_code; for (j = 0; j < 32; ++j) { if (table_lengths[j] == -1) { decode_table->table_pointers[j] = decode_table->table_data; } else { decode_table->table_pointers[j] = p; *p++ = j - table_lengths[j]; p += 1 << table_lengths[j]; } } for (k=0; k<256; ++k) { if (add_shifted[k]) { firstbit = code_firstbits[k]; val = add_shifted[k] - (1 << firstbit); table = decode_table->table_pointers[firstbit]; memset(&table[1 + (val >> table[0])], k, 1 << (table_lengths[firstbit] - code_lengths[k])); } } return hufftable; } unsigned char* InitializeShiftAddTables(unsigned char* hufftable, unsigned char* shift, unsigned* add_shifted) { int i, j; unsigned int bits; // must be 32bit unsigned int min_already_processed; int max_not_processed; int bit; // special-case the old tables, since they don't fit the new rules if (hufftable == HUFFTABLE_CLASSIC_YUV || hufftable == HUFFTABLE_CLASSIC_RGB) { DecompressHuffmanTable(classic_shift_luma, shift); for (i = 0; i < 256; ++i) add_shifted[i] = classic_add_luma[i] << (32 - shift[i]); return (hufftable == HUFFTABLE_CLASSIC_YUV) ? HUFFTABLE_CLASSIC_YUV_CHROMA : hufftable; } else if (hufftable == HUFFTABLE_CLASSIC_YUV_CHROMA) { DecompressHuffmanTable(classic_shift_chroma, shift); for (i = 0; i < 256; ++i) add_shifted[i] = classic_add_chroma[i] << (32 - shift[i]); return hufftable; } hufftable = DecompressHuffmanTable(hufftable, shift); // derive the actual bit patterns from the code lengths min_already_processed = 32; bits = 0; do { max_not_processed = 0; for (i = 0; i < 256; ++i) { if (shift[i] < min_already_processed && shift[i] > max_not_processed) max_not_processed = shift[i]; } bit = 1 << (32 - max_not_processed); // assert (!(bits & (bit - 1))); for (j = 0; j < 256; ++j) { if (shift[j] == max_not_processed) { add_shifted[j] = bits; bits += bit; } } min_already_processed = max_not_processed; } while (bits & 0xFFFFFFFF); return hufftable; } unsigned char* DecompressHuffmanTable(unsigned char* hufftable, unsigned char* dst) { int val; int repeat; int i = 0; do { val = *hufftable & 31; repeat = *hufftable++ >> 5; if (!repeat) repeat = *hufftable++; while (repeat--) dst[i++] = val; } while (i < 256); return hufftable; } unsigned char huff_decompress(unsigned int* in, unsigned int *pos, DecodeTable *decode_table, unsigned char *decode_shift) { unsigned int word = *pos >> 5; unsigned int bit = *pos & 31; unsigned int val = in[word]; unsigned char outbyte; unsigned char *tableptr; int i; if (bit) val = (val << bit) | (in[word + 1] >> (32 - bit)); // figure out the appropriate lookup table based on the number of leading zeros i = 31; val |= 1; while ((val & (1 << i--)) == 0); val &= ~(1 << (i+1)); tableptr = decode_table->table_pointers[i+1]; val >>= *tableptr; outbyte = tableptr[val+1]; *pos += decode_shift[outbyte]; return outbyte; }