mirror of
https://github.com/mpv-player/mpv
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817080c800
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5262 b3059339-0415-0410-9bf9-f77b7e298cf2
873 lines
24 KiB
C
873 lines
24 KiB
C
/*
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*
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* HuffYUV Decoder for Mplayer
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* (c) 2002 Roberto Togni
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*
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* Fourcc: HFYU
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*
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* Original Win32 codec copyright:
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*
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*** Huffyuv v2.1.1, by Ben Rudiak-Gould.
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*** http://www.math.berkeley.edu/~benrg/huffyuv.html
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***
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*** This file is copyright 2000 Ben Rudiak-Gould, and distributed under
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*** the terms of the GNU General Public License, v2 or later. See
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*** http://www.gnu.org/copyleft/gpl.html.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "config.h"
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#include "mp_msg.h"
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#include "vd_internal.h"
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static vd_info_t info = {
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"HuffYUV Video decoder",
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"huffyuv",
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VFM_HUFFYUV,
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"Roberto Togni",
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"Roberto Togni",
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"native codec, original win32 by Ben Rudiak-Gould http://www.math.berkeley.edu/~benrg/huffyuv.html"
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};
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LIBVD_EXTERN(huffyuv)
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/*
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* Bitmap types
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*/
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#define BMPTYPE_YUV -1
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#define BMPTYPE_RGB -2
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#define BMPTYPE_RGBA -3
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/*
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* Compression methods
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*/
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#define METHOD_LEFT 0
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#define METHOD_GRAD 1
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#define METHOD_MEDIAN 2
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#define DECORR_FLAG 64
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#define METHOD_LEFT_DECORR (METHOD_LEFT | DECORR_FLAG)
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#define METHOD_GRAD_DECORR (METHOD_GRAD | DECORR_FLAG)
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#define METHOD_OLD -2
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#define FOURCC_HFYU mmioFOURCC('H','F','Y','U')
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#define HUFFTABLE_CLASSIC_YUV ((unsigned char*) -1)
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#define HUFFTABLE_CLASSIC_RGB ((unsigned char*) -2)
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#define HUFFTABLE_CLASSIC_YUV_CHROMA ((unsigned char*) -3)
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/*
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* Huffman table
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*/
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typedef struct {
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unsigned char* table_pointers[32];
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unsigned char table_data[129*25];
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} DecodeTable;
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/*
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* Decoder context
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*/
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typedef struct {
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// Real image depth
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int bitcount;
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// Prediction method
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int method;
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// Bitmap color type
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int bitmaptype;
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// Huffman tables
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unsigned char decode1_shift[256];
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unsigned char decode2_shift[256];
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unsigned char decode3_shift[256];
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DecodeTable decode1, decode2, decode3;
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// Above line buffers
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unsigned char *abovebuf1, *abovebuf2;
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} huffyuv_context_t;
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/*
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* Classic Huffman tables
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*/
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unsigned char classic_shift_luma[] = {
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34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8,
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16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70,
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69,68, 0
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};
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unsigned char classic_shift_chroma[] = {
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66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183,
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56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119,
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214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0
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};
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unsigned char classic_add_luma[256] = {
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3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
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73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
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68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
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35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
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37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
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35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
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27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
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15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
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12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6,
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12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
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18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
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28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
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28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
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62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
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54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
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46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8,
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};
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unsigned char classic_add_chroma[256] = {
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3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9,
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7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7,
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11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,
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43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63,
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143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
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80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,
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17, 14, 5, 6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111,
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112,113,114,115, 4,117,118, 92, 94,121,122, 3,124,103, 2, 1,
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0,129,130,131,120,119,126,125,136,137,138,139,140,141,142,134,
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135,132,133,104, 64,101, 62, 57,102, 95, 93, 59, 61, 28, 97, 96,
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52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,
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19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36,
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7,128,127,105,123,116, 35, 34, 33,145, 31, 79, 42,146, 78, 26,
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83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,
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14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8,
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6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2,
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};
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/*
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* Internal function prototypes
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*/
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unsigned char* InitializeDecodeTable(unsigned char* hufftable,
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unsigned char* shift, DecodeTable* decode_table);
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unsigned char* InitializeShiftAddTables(unsigned char* hufftable,
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unsigned char* shift, unsigned* add_shifted);
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unsigned char* DecompressHuffmanTable(unsigned char* hufftable,
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unsigned char* dst);
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unsigned char huff_decompress(unsigned int* in, unsigned int *pos,
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DecodeTable *decode_table, unsigned char *decode_shift);
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// to set/get/query special features/parameters
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static int control(sh_video_t *sh,int cmd,void* arg,...)
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{
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switch(cmd) {
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case VDCTRL_QUERY_FORMAT:
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if (((huffyuv_context_t *)(sh->context))->bitmaptype == BMPTYPE_YUV) {
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if (*((int*)arg) == IMGFMT_YUY2)
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return CONTROL_TRUE;
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else
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return CONTROL_FALSE;
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} else {
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if ((*((int*)arg) == IMGFMT_BGR32) || (*((int*)arg) == IMGFMT_BGR24))
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return CONTROL_TRUE;
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else
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return CONTROL_FALSE;
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}
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}
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return CONTROL_UNKNOWN;
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}
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/*
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*
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* Init HuffYUV decoder
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*
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*/
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static int init(sh_video_t *sh)
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{
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int vo_ret; // Video output init ret value
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huffyuv_context_t *hc; // Decoder context
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unsigned char *hufftable; // Compressed huffman tables
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BITMAPINFOHEADER *bih = sh->bih;
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if ((hc = malloc(sizeof(huffyuv_context_t))) == NULL) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Can't allocate memory for HuffYUV decoder context\n");
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return 0;
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}
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sh->context = (void *)hc;
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Allocating above line buffer\n");
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if ((hc->abovebuf1 = malloc(sizeof(char) * 4 * bih->biWidth)) == NULL) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Can't allocate memory for HuffYUV above buffer 1\n");
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return 0;
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}
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if ((hc->abovebuf2 = malloc(sizeof(char) * 4 * bih->biWidth)) == NULL) {
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Can't allocate memory for HuffYUV above buffer 2\n");
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return 0;
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}
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if (bih->biCompression != FOURCC_HFYU) {
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[HuffYUV] BITMAPHEADER fourcc != HFYU\n");
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return 0;
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}
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/* Get bitcount */
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hc->bitcount = 0;
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if (bih->biSize > sizeof(BITMAPINFOHEADER)+1)
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hc->bitcount = *((char*)bih + sizeof(BITMAPINFOHEADER) + 1);
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if (hc->bitcount == 0)
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hc->bitcount = bih->biBitCount;
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/* Get bitmap type */
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switch (hc->bitcount & ~7) {
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case 16:
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hc->bitmaptype = BMPTYPE_YUV; // -1
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Image type is YUV\n");
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break;
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case 24:
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hc->bitmaptype = BMPTYPE_RGB; // -2
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Image type is RGB\n");
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break;
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case 32:
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hc->bitmaptype = BMPTYPE_RGBA; //-3
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Image type is RGBA\n");
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break;
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default:
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hc->bitmaptype = 0; // ERR
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[HuffYUV] Image type is unknown\n");
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}
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/* Get method */
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switch (bih->biBitCount & 7) {
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case 0:
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if (bih->biSize > sizeof(BITMAPINFOHEADER)) {
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hc->method = *((unsigned char*)bih + sizeof(BITMAPINFOHEADER));
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method stored in extra data\n");
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} else
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hc->method = METHOD_OLD; // Is it really needed?
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break;
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case 1:
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hc->method = METHOD_LEFT;
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break;
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case 2:
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hc->method = METHOD_LEFT_DECORR;
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break;
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case 3:
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if (hc->bitmaptype == BMPTYPE_YUV) {
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hc->method = METHOD_GRAD;
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} else {
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hc->method = METHOD_GRAD_DECORR;
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}
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break;
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case 4:
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hc->method = METHOD_MEDIAN;
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break;
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default:
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: fallback to METHOD_OLD\n");
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hc->method = METHOD_OLD;
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}
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/* Print method info */
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switch (hc->method) {
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case METHOD_LEFT:
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: Predict Left\n");
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break;
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case METHOD_GRAD:
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: Predict Gradient\n");
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break;
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case METHOD_MEDIAN:
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: Predict Median\n");
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break;
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case METHOD_LEFT_DECORR:
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: Predict Left with decorrelation\n");
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break;
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case METHOD_GRAD_DECORR:
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method: Predict Gradient with decorrelation\n");
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break;
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case METHOD_OLD:
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Method Old\n");
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break;
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default:
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mp_msg(MSGT_DECVIDEO, MSGL_WARN, "[HuffYUV] Method unknown\n");
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}
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/* Get compressed Huffman tables */
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if (bih->biSize == sizeof(BITMAPINFOHEADER) /*&& !(bih->biBitCount&7)*/) {
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hufftable = (hc->bitmaptype == BMPTYPE_YUV) ? HUFFTABLE_CLASSIC_YUV : HUFFTABLE_CLASSIC_RGB;
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Using classic static Huffman tables\n");
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} else {
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hufftable = (unsigned char*)bih + sizeof(BITMAPINFOHEADER) + ((bih->biBitCount&7) ? 0 : 4);
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mp_msg(MSGT_DECVIDEO, MSGL_V, "[HuffYUV] Using Huffman tables stored in file\n");
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}
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/* Initialize decoder Huffman tables */
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hufftable = InitializeDecodeTable(hufftable, hc->decode1_shift, &(hc->decode1));
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hufftable = InitializeDecodeTable(hufftable, hc->decode2_shift, &(hc->decode2));
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InitializeDecodeTable(hufftable, hc->decode3_shift, &(hc->decode3));
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/*
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* Initialize video output device
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*/
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switch (hc->bitmaptype) {
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case BMPTYPE_YUV:
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vo_ret = mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_YUY2);
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break;
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case BMPTYPE_RGB:
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vo_ret = mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_BGR24);
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break;
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case BMPTYPE_RGBA:
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[HuffYUV] RGBA not supported yet.\n");
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return 0;
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default:
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "[HuffYUV] BUG! Unknown bitmaptype in vo config.\n");
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return 0;
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}
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return vo_ret;
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}
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/*
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*
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* Uninit HuffYUV decoder
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*
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*/
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static void uninit(sh_video_t *sh)
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{
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if (sh->context) {
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if (((huffyuv_context_t*)&sh->context)->abovebuf1)
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free(((huffyuv_context_t*)sh->context)->abovebuf1);
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if (((huffyuv_context_t*)&sh->context)->abovebuf2)
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free(((huffyuv_context_t*)sh->context)->abovebuf2);
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free(sh->context);
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}
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}
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#define HUFF_DECOMPRESS_YUYV() \
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{ \
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y1 = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode1), hc->decode1_shift); \
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u = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode2), hc->decode2_shift); \
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y2 = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode1), hc->decode1_shift); \
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v = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode3), hc->decode3_shift); \
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}
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#define HUFF_DECOMPRESS_RGB_DECORR() \
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{ \
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g = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode2), hc->decode2_shift); \
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b = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode1), hc->decode1_shift); \
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r = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode3), hc->decode3_shift); \
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}
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#define HUFF_DECOMPRESS_RGB() \
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{ \
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b = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode1), hc->decode1_shift); \
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g = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode2), hc->decode2_shift); \
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r = huff_decompress((unsigned int *)encoded, &pos, &(hc->decode3), hc->decode3_shift); \
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}
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#define MEDIAN(left, above, aboveleft) \
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{ \
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if ((mi = (above)) > (left)) { \
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mx = mi; \
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mi = (left); \
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} else \
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mx = (left); \
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tmp = (above) + (left) - (aboveleft); \
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if (tmp < mi) \
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med = mi; \
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else if (tmp > mx) \
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med = mx; \
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else \
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med = tmp; \
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}
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#define YUV_STORE1ST_ABOVEBUF() \
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{ \
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abovebuf[0] = outptr[0] = encoded[0]; \
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abovebuf[1] = left_u = outptr[1] = encoded[1]; \
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abovebuf[2] = left_y = outptr[2] = encoded[2]; \
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abovebuf[3] = left_v = outptr[3] = encoded[3]; \
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pixel_ptr = 4; \
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}
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#define YUV_STORE1ST() \
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{ \
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outptr[0] = encoded[0]; \
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left_u = outptr[1] = encoded[1]; \
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left_y = outptr[2] = encoded[2]; \
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left_v = outptr[3] = encoded[3]; \
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pixel_ptr = 4; \
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}
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#define RGB_STORE1ST() \
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{ \
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pixel_ptr = (height-1)*mpi->stride[0]; \
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left_b = outptr[pixel_ptr++] = encoded[1]; \
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left_g = outptr[pixel_ptr++] = encoded[2]; \
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left_r = outptr[pixel_ptr++] = encoded[3]; \
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pixel_ptr += bgr32; \
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}
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#define RGB_STORE1ST_ABOVEBUF() \
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{ \
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pixel_ptr = (height-1)*mpi->stride[0]; \
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abovebuf[0] = left_b = outptr[pixel_ptr++] = encoded[1]; \
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abovebuf[1] = left_g = outptr[pixel_ptr++] = encoded[2]; \
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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 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() \
|
|
{ \
|
|
outptr[pixel_ptr++] = left_b += b; \
|
|
outptr[pixel_ptr++] = left_g += g; \
|
|
outptr[pixel_ptr++] = left_r += r; \
|
|
pixel_ptr += bgr32; \
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
*
|
|
* 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 bgr32;
|
|
|
|
// skipped frame
|
|
if(len <= 0)
|
|
return NULL;
|
|
|
|
/* Do not accept stride for rgb, it gives me wrong output :-( */
|
|
if (hc->bitmaptype == BMPTYPE_YUV)
|
|
mpi=mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE, sh->disp_w, sh->disp_h);
|
|
else
|
|
mpi=mpcodecs_get_image(sh, MP_IMGTYPE_TEMP, 0, 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
|
|
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);
|
|
}
|
|
curbuf[width*4-1] = curbuf[width*4-2] = curbuf[width*4-3] = 0;
|
|
for (row = 1; row < height; row++) {
|
|
pixel_ptr = row * mpi->stride[0];
|
|
HUFF_DECOMPRESS_YUYV();
|
|
curbuf[0] = outptr[pixel_ptr++] = left_y += y1 + abovebuf[0] - curbuf[width*4-2];
|
|
curbuf[1] = outptr[pixel_ptr++] = left_u += u + abovebuf[1] - curbuf[width*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[width*4+3-4];
|
|
for (col = 1*4; col < width*4; col += 4) {
|
|
HUFF_DECOMPRESS_YUYV();
|
|
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];
|
|
}
|
|
swap = abovebuf;
|
|
abovebuf = curbuf;
|
|
curbuf = swap;
|
|
}
|
|
} 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);
|
|
}
|
|
// Decompress 1st two pixels of 2nd row
|
|
pixel_ptr = mpi->stride[0];
|
|
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();
|
|
}
|
|
swap = abovebuf;
|
|
abovebuf = curbuf;
|
|
curbuf = swap;
|
|
for (row = 2; row < height; row++) {
|
|
pixel_ptr = row * mpi->stride[0];
|
|
HUFF_DECOMPRESS_YUYV();
|
|
MEDIAN (left_y, abovebuf[0], curbuf[width*4-2]);
|
|
curbuf[0] = outptr[pixel_ptr++] = left_y = med + y1;
|
|
MEDIAN (left_u, abovebuf[1], curbuf[width*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[width*4+3-4]);
|
|
curbuf[3] = outptr[pixel_ptr++] = left_v = med + v;
|
|
for (col = 1*4; col < width*4; col += 4) {
|
|
HUFF_DECOMPRESS_YUYV();
|
|
YUV_PREDMED();
|
|
}
|
|
swap = abovebuf;
|
|
abovebuf = curbuf;
|
|
curbuf = swap;
|
|
}
|
|
} 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();
|
|
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;
|
|
}
|
|
curbuf[width*3-1] = curbuf[width*3-2] = curbuf[width*3-3] = 0;
|
|
for (row = 1; row < height; row++) {
|
|
pixel_ptr = (height - row - 1) * mpi->stride[0];
|
|
HUFF_DECOMPRESS_RGB_DECORR();
|
|
curbuf[0] = outptr[pixel_ptr++] = left_b += b + g + abovebuf[0] - curbuf[width*3-3];
|
|
curbuf[1] = outptr[pixel_ptr++] = left_g += g + abovebuf[1] - curbuf[width*3+1-3];
|
|
curbuf[2] = outptr[pixel_ptr++] = left_r += r + g + abovebuf[2] - curbuf[width*3+2-3];
|
|
pixel_ptr += bgr32;
|
|
for (col = 1*3; col < width*3; col += 3) {
|
|
HUFF_DECOMPRESS_RGB_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;
|
|
}
|
|
swap = abovebuf;
|
|
abovebuf = curbuf;
|
|
curbuf = swap;
|
|
}
|
|
} 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;
|
|
}
|