www.pudn.com > coremp4-1.0.zip > CodecAPI.cpp

/***************************************************************************** 
 * 
 * This program is free software ; you can redistribute it and/or modify 
 * it under the terms of the GNU General Public License as published by 
 * the Free Software Foundation; either version 2 of the License, or 
 * (at your option) any later version. 
 * 
 * This program is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
 * GNU General Public License for more details. 
 * 
 * You should have received a copy of the GNU General Public License 
 * along with this program; if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA 
 * 
 ****************************************************************************/ 
 
#ifdef __SYMBIAN32__ 
#include  
#include  
GLDEF_C TInt E32Dll(TDllReason){ return KErrNone; } 
#else 
#endif 
 
#define SUPPORTED_CODEC_VERSION 310 
 
#include "Rules.h" 
#include "Util.h" 
#include "VideoCodec.h" 
 
#if defined LINUX || defined __SYMBIAN32__ 
extern"C"{ 
#endif 
 
//---------------------------- 
// communication functions 
 
void *InitCodec(dword sx, dword sy, dword fcc, dword codec_version, void *profiler); 
void CloseCodec(void *handle); 
int DecodeFrame(void *handle, const void *buf, dword sz_in, const byte *&y, const byte *&u, const byte *&v, dword &pitch, bool dropping); 
dword Version(); 
 
#if defined LINUX || defined __SYMBIAN32__ 
} 
#endif 
 
//---------------------------- 
 
dword Version(){ 
   return SUPPORTED_CODEC_VERSION; 
} 
 
//---------------------------- 
 
#define FCC(a, b, c, d) dword((d<<24) | (c<<16) | (b<<8) | a) 
 
//---------------------------- 
 
void *InitCodec(dword sx, dword sy, dword fcc, dword codec_version, void *profiler){ 
 
   if(codec_version500) 
      return NULL; 
   { 
                              //make the fcc lower-case 
      char *cp = (char*)&fcc; 
      for(int i=0; i<4; i++){ 
         char &c = cp[i]; 
         if(c>='A' && c<='Z') 
            c += 'a' - 'A'; 
      } 
   } 
 
   switch(fcc){ 
   case FCC('x', 'v', 'i', 'd'): 
   case FCC('d', 'i', 'v', 'x'): 
   case FCC('d', 'x', '5', '0'): 
   case FCC('3', 'i', 'v', '2'): 
   case FCC('3', 'i', 'v', 'x'): 
      break; 
   default: 
      return NULL; 
   } 
   C_mp4_decode *dec = CreateMp4Decode(sx, sy, profiler); 
   if(!dec){ 
#ifdef __PALMOS__ 
      void Info(const char*, dword=0); 
      Info("Core MP4: not enough memory for initialization"); 
#endif 
      return NULL; 
   } 
   return dec; 
} 
 
//---------------------------- 
 
void CloseCodec(void *handle){ 
   C_mp4_decode *dec = (C_mp4_decode*)handle; 
   delete dec; 
} 
 
//---------------------------- 
 
int DecodeFrame(void *handle, const void *buf, dword sz_in, const byte *&y, const byte *&u, const byte *&v, dword &pitch, bool dropping){ 
 
   C_mp4_decode *dec = (C_mp4_decode*)handle; 
   S_yuv_image out; 
   if(!dec->Process((byte*)buf, sz_in, (int)dropping, out)) 
      return 0; 
   y = out.y; 
   u = out.u; 
   v = out.v; 
   pitch = out.pitch; 
   return 1; 
} 
 
//---------------------------- 
 
#ifdef __PALMOS__ 
 
extern"C" 
void *DllMain(dword ord){ 
 
   switch(ord){ 
   case 1: return (void*)&InitCodec; 
   case 2: return (void*)&CloseCodec; 
   case 3: return (void*)&DecodeFrame; 
   } 
   return NULL; 
} 
 
#endif 
 
//----------------------------