gui/bitmap.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include "mp_msg.h"
  24 #include "help_mp.h"
  25 #include "bitmap.h"
  26 #include "libavcodec/avcodec.h"
  27 #include "libavutil/intreadwrite.h"
  28 #include "libvo/fastmemcpy.h"
  29
  30 static int pngRead( unsigned char * fname,txSample * bf )
  31 {
  32  int             decode_ok;
  33  void           *data;
  34  int             len;
  35  AVCodecContext *avctx;
  36  AVFrame        *frame;
  37
  38  FILE *fp=fopen( fname,"rb" );
  39  if ( !fp )
  40   {
  41    mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[png] file read error ( %s )\n",fname );
  42    return 1;
  43   }
  44
  45  fseek(fp, 0, SEEK_END);
  46  len = ftell(fp);
  47  if (len > 50 * 1024 * 1024) return 2;
  48  data = malloc(len + FF_INPUT_BUFFER_PADDING_SIZE);
  49  fseek(fp, 0, SEEK_SET);
  50  fread(data, len, 1, fp);
  51  fclose(fp);
  52  avctx = avcodec_alloc_context();
  53  frame = avcodec_alloc_frame();
  54  avcodec_register_all();
  55  avcodec_open(avctx, avcodec_find_decoder(CODEC_ID_PNG));
  56  avcodec_decode_video(avctx, frame, &decode_ok, data, len);
  57  memset(bf, 0, sizeof(*bf));
  58  switch (avctx->pix_fmt) {
  59    case PIX_FMT_GRAY8:    bf->BPP =  8; break;
  60    case PIX_FMT_GRAY16BE: bf->BPP = 16; break;
  61    case PIX_FMT_RGB24:    bf->BPP = 24; break;
  62    case PIX_FMT_RGB32:    bf->BPP = 32; break;
  63    default:               bf->BPP =  0; break;
  64  }
  65  if (decode_ok && bf->BPP) {
  66    int bpl;
  67    bf->Width = avctx->width; bf->Height = avctx->height;
  68    bpl = bf->Width * (bf->BPP / 8);
  69    bf->ImageSize = bpl * bf->Height;
  70    bf->Image = malloc(bf->ImageSize);
  71    memcpy_pic(bf->Image, frame->data[0], bpl, bf->Height, bpl, frame->linesize[0]);
  72  }
  73  avcodec_close(avctx);
  74  av_freep(&frame);
  75  av_freep(&avctx);
  76
  77  mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[png] filename: %s.\n",fname );
  78  mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[png]  size: %dx%d bits: %d\n",bf->Width,bf->Height,bf->BPP );
  79  mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[png]  imagesize: %lu\n",bf->ImageSize );
  80  return !(decode_ok && bf->BPP);
  81 }
  82
  83 static int conv24to32( txSample * bf )
  84 {
  85  unsigned char * tmpImage;
  86  int             i,c;
  87
  88  if ( bf->BPP == 24 )
  89   {
  90    tmpImage=bf->Image;
  91    bf->ImageSize=bf->Width * bf->Height * 4;
  92    bf->BPP=32;
  93    if ( ( bf->Image=calloc( 1, bf->ImageSize ) ) == NULL )
  94     {
  95      free( tmpImage );
  96      mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[bitmap] not enough memory for image\n" );
  97      return 1;
  98     }
  99    for ( c=0,i=0; c < bf->ImageSize; c += 4, i += 3)
 100     {
 101      *(uint32_t *)&bf->Image[c] = AV_RB24(&tmpImage[i]);
 102     }
 103    free( tmpImage );
 104   }
 105  return 0;
 106 }
 107
 108 static void Normalize( txSample * bf )
 109 {
 110  int           i;
 111 #if !HAVE_BIGENDIAN
 112  for ( i=0;i < (int)bf->ImageSize;i+=4 ) bf->Image[i+3]=0;
 113 #else
 114  for ( i=0;i < (int)bf->ImageSize;i+=4 ) bf->Image[i]=0;
 115 #endif
 116 }
 117
 118 static unsigned char tmp[512];
 119
 120 static unsigned char * fExist( unsigned char * fname )
 121 {
 122  FILE          * fl;
 123  unsigned char   ext[][6] = { ".png\0",".PNG\0" };
 124  int             i;
 125
 126  fl=fopen( fname,"rb" );
 127  if ( fl != NULL )
 128   {
 129    fclose( fl );
 130    return fname;
 131   }
 132  for ( i=0;i<2;i++ )
 133   {
 134    snprintf( tmp,511,"%s%s",fname,ext[i] );
 135    fl=fopen( tmp,"rb" );
 136    if ( fl != NULL )
 137     {
 138      fclose( fl );
 139      return tmp;
 140     }
 141   }
 142  return NULL;
 143 }
 144
 145 int bpRead( char * fname, txSample * bf )
 146 {
 147  fname=fExist( fname );
 148  if ( fname == NULL ) return -2;
 149  if ( pngRead( fname,bf ) )
 150   {
 151    mp_dbg( MSGT_GPLAYER,MSGL_FATAL,"[bitmap] unknown file type ( %s )\n",fname );
 152    return -5;
 153   }
 154  if ( bf->BPP < 24 )
 155   {
 156    mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[bitmap] Sorry, only 24 and 32 bpp bitmaps are supported.\n" );
 157    return -1;
 158   }
 159  if ( conv24to32( bf ) ) return -8;
 160  Normalize( bf );
 161  return 0;
 162 }
 163
 164 void Convert32to1( txSample * in,txSample * out,int adaptivlimit )
 165 {
 166  out->Width=in->Width;
 167  out->Height=in->Height;
 168  out->BPP=1;
 169  out->ImageSize=(out->Width * out->Height + 7) / 8;
 170  mp_dbg( MSGT_GPLAYER,MSGL_DBG2,"[c32to1] imagesize: %d\n",out->ImageSize );
 171  out->Image=calloc( 1,out->ImageSize );
 172  if ( out->Image == NULL ) mp_msg( MSGT_GPLAYER,MSGL_WARN,MSGTR_NotEnoughMemoryC32To1 );
 173  {
 174   int i,b,c=0; unsigned int * buf = NULL; unsigned char tmp = 0; int nothaveshape = 1;
 175   buf=(unsigned int *)in->Image;
 176   for ( b=0,i=0;i < (int)(out->Width * out->Height);i++ )
 177    {
 178     if ( (int)buf[i] != adaptivlimit ) tmp=( tmp >> 1 )|128;
 179      else { tmp=tmp >> 1; buf[i]=nothaveshape=0; }
 180     if ( b++ == 7 ) { out->Image[c++]=tmp; tmp=b=0; }
 181    }
 182   if ( b ) out->Image[c]=tmp;
 183   if ( nothaveshape ) { free( out->Image ); out->Image=NULL; }
 184  }
 185 }