libmpcodecs/native/nuppelvideo.c

   1 /*
   2  * NuppelVideo 0.05 file parser
   3  * for MPlayer
   4  * by Panagiotis Issaris <takis@lumumba.luc.ac.be>
   5  *
   6  * Reworked by alex
   7  */
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12 #include <string.h>
  13
  14 #include "config.h"
  15 #include "mp_msg.h"
  16 #include "mpbswap.h"
  17
  18 #include "libvo/fastmemcpy.h"
  19
  20 #include "libmpdemux/nuppelvideo.h"
  21 #include "rtjpegn.h"
  22 #include "libavutil/lzo.h"
  23
  24 #define KEEP_BUFFER
  25
  26 void decode_nuv( unsigned char *encoded, int encoded_size,
  27                 unsigned char *decoded, int width, int height)
  28 {
  29         int r;
  30         unsigned int out_len = width * height + ( width * height ) / 2;
  31         struct rtframeheader *encodedh = ( struct rtframeheader* ) encoded;
  32         static unsigned char *buffer = 0; /* for RTJpeg with LZO decompress */
  33 #ifdef KEEP_BUFFER
  34         static unsigned char *previous_buffer = 0; /* to support Last-frame-copy */
  35 #endif
  36
  37 //      printf("frametype: %c, comtype: %c, encoded_size: %d, width: %d, height: %d\n",
  38 //          encodedh->frametype, encodedh->comptype, encoded_size, width, height);
  39
  40         le2me_rtframeheader(encodedh);
  41         switch(encodedh->frametype)
  42         {
  43             case 'D':   /* additional data for compressors */
  44             {
  45                 /* tables are in encoded */
  46                 if (encodedh->comptype == 'R')
  47                 {
  48                     RTjpeg_init_decompress ( (unsigned long *)(encoded+12), width, height );
  49                     mp_msg(MSGT_DECVIDEO, MSGL_V, "Found RTjpeg tables (size: %d, width: %d, height: %d)\n",
  50                         encoded_size-12, width, height);
  51                 }
  52                 break;
  53             }
  54             case 'V':
  55             {
  56                 int in_len = encodedh->packetlength;
  57 #ifdef KEEP_BUFFER
  58                 if (!previous_buffer)
  59                         previous_buffer = ( unsigned char * ) malloc ( out_len + LZO_OUTPUT_PADDING );
  60 #endif
  61
  62                 switch(encodedh->comptype)
  63                 {
  64                     case '0': /* raw YUV420 */
  65                         fast_memcpy(decoded, encoded + 12, out_len);
  66                         break;
  67                     case '1': /* RTJpeg */
  68                         RTjpeg_decompressYUV420 ( ( __s8 * ) encoded + 12, decoded );
  69                         break;
  70                     case '2': /* RTJpeg with LZO */
  71                         if (!buffer)
  72                             buffer = ( unsigned char * ) malloc ( out_len + LZO_OUTPUT_PADDING );
  73                         if (!buffer)
  74                         {
  75                             mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Nuppelvideo: error decompressing\n");
  76                             break;
  77                         }
  78                         r = lzo1x_decode ( buffer, &out_len, encoded + 12, &in_len );
  79                         if ( r )
  80                         {
  81                             mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Nuppelvideo: error decompressing\n");
  82                             break;
  83                         }
  84                         RTjpeg_decompressYUV420 ( ( __s8 * ) buffer, decoded );
  85                         break;
  86                     case '3': /* raw YUV420 with LZO */
  87                         r = lzo1x_decode ( decoded, &out_len, encoded + 12, &in_len );
  88                         if ( r )
  89                         {
  90                             mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Nuppelvideo: error decompressing\n");
  91                             break;
  92                         }
  93                         break;
  94                     case 'N': /* black frame */
  95                         memset ( decoded, 0,  width * height );
  96                         memset ( decoded + width * height, 127, width * height / 2);
  97                         break;
  98                     case 'L': /* copy last frame */
  99 #ifdef KEEP_BUFFER
 100                         fast_memcpy ( decoded, previous_buffer, width*height*3/2);
 101 #endif
 102                         break;
 103                 }
 104
 105 #ifdef KEEP_BUFFER
 106                 fast_memcpy(previous_buffer, decoded, width*height*3/2);
 107 #endif
 108                 break;
 109             }
 110             default:
 111                 mp_msg(MSGT_DECVIDEO, MSGL_V, "Nuppelvideo: unknwon frametype: %c\n",
 112                     encodedh->frametype);
 113         }
 114 }