synfig-core/trunk/src/modules/mod_ffmpeg/mptr_ffmpeg.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file mptr_ffmpeg.cpp
   3 **      \brief ppm Target Module
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 2007 Chris Moore
  10 **
  11 **      This package is free software; you can redistribute it and/or
  12 **      modify it under the terms of the GNU General Public License as
  13 **      published by the Free Software Foundation; either version 2 of
  14 **      the License, or (at your option) any later version.
  15 **
  16 **      This package is distributed in the hope that it will be useful,
  17 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19 **      General Public License for more details.
  20 **      \endlegal
  21 **
  22 ** === N O T E S ===========================================================
  23 **
  24 ** ========================================================================= */
  25
  26 /* === H E A D E R S ======================================================= */
  27
  28 #ifdef USING_PCH
  29 #       include "pch.h"
  30 #else
  31 #ifdef HAVE_CONFIG_H
  32 #       include <config.h>
  33 #endif
  34
  35 #include <ETL/stringf>
  36 #include "mptr_ffmpeg.h"
  37 #include <stdio.h>
  38 #include <sys/types.h>
  39 #if HAVE_SYS_WAIT_H
  40  #include <sys/wait.h>
  41 #endif
  42 #if HAVE_IO_H
  43  #include <io.h>
  44 #endif
  45 #if HAVE_PROCESS_H
  46  #include <process.h>
  47 #endif
  48 #if HAVE_FCNTL_H
  49  #include <fcntl.h>
  50 #endif
  51 #include <unistd.h>
  52 #include <iostream>
  53 #include <algorithm>
  54 #include <functional>
  55 #include <ETL/stringf>
  56 #endif
  57
  58 /* === M A C R O S ========================================================= */
  59
  60 using namespace synfig;
  61 using namespace std;
  62 using namespace etl;
  63
  64 #if defined(HAVE_FORK) && defined(HAVE_PIPE) && defined(HAVE_WAITPID)
  65  #define UNIX_PIPE_TO_PROCESSES
  66 #else
  67  #define WIN32_PIPE_TO_PROCESSES
  68 #endif
  69
  70 /* === G L O B A L S ======================================================= */
  71
  72 SYNFIG_IMPORTER_INIT(ffmpeg_mptr);
  73 SYNFIG_IMPORTER_SET_NAME(ffmpeg_mptr,"ffmpeg");
  74 SYNFIG_IMPORTER_SET_EXT(ffmpeg_mptr,"avi");
  75 SYNFIG_IMPORTER_SET_VERSION(ffmpeg_mptr,"0.1");
  76 SYNFIG_IMPORTER_SET_CVS_ID(ffmpeg_mptr,"$Id$");
  77
  78 /* === M E T H O D S ======================================================= */
  79
  80 bool ffmpeg_mptr::is_animated()
  81 {
  82         return true;
  83 }
  84
  85 bool
  86 ffmpeg_mptr::seek_to(int frame)
  87 {
  88         if(frame<cur_frame || !file)
  89         {
  90                 if(file)
  91                 {
  92 #if defined(WIN32_PIPE_TO_PROCESSES)
  93                         pclose(file);
  94 #elif defined(UNIX_PIPE_TO_PROCESSES)
  95                         fclose(file);
  96                         int status;
  97                         waitpid(pid,&status,0);
  98 #endif
  99                 }
 100
 101 #if defined(WIN32_PIPE_TO_PROCESSES)
 102
 103                 string command;
 104
 105                 command=strprintf("ffmpeg -i \"%s\" -an -f image2pipe -vcodec ppm -\n",filename.c_str());
 106
 107                 file=popen(command.c_str(),POPEN_BINARY_READ_TYPE);
 108
 109 #elif defined(UNIX_PIPE_TO_PROCESSES)
 110
 111                 int p[2];
 112
 113                 if (pipe(p)) {
 114                         cerr<<"Unable to open pipe to ffmpeg"<<endl;
 115                         return false;
 116                 };
 117
 118                 pid = fork();
 119
 120                 if (pid == -1) {
 121                         cerr<<"Unable to open pipe to ffmpeg"<<endl;
 122                         return false;
 123                 }
 124
 125                 if (pid == 0){
 126                         // Child process
 127                         // Close pipein, not needed
 128                         close(p[0]);
 129                         // Dup pipein to stdout
 130                         if( dup2( p[1], STDOUT_FILENO ) == -1 ){
 131                                 cerr<<"Unable to open pipe to ffmpeg"<<endl;
 132                                 return false;
 133                         }
 134                         // Close the unneeded pipein
 135                         close(p[1]);
 136                         execlp("ffmpeg", "ffmpeg", "-i", filename.c_str(), "-an", "-f", "image2pipe", "-vcodec", "ppm", "-", (const char *)NULL);
 137                         // We should never reach here unless the exec failed
 138                         cerr<<"Unable to open pipe to ffmpeg"<<endl;
 139                         _exit(1);
 140                 } else {
 141                         // Parent process
 142                         // Close pipeout, not needed
 143                         close(p[1]);
 144                         // Save pipein to file handle, will read from it later
 145                         file = fdopen(p[0], "rb");
 146                 }
 147
 148 #else
 149         #error There are no known APIs for creating child processes
 150 #endif
 151
 152                 if(!file)
 153                 {
 154                         cerr<<"Unable to open pipe to ffmpeg"<<endl;
 155                         return false;
 156                 }
 157                 cur_frame=-1;
 158         }
 159
 160         while(cur_frame<frame-1)
 161         {
 162                 cerr<<"Seeking to..."<<frame<<'('<<cur_frame<<')'<<endl;
 163                 if(!grab_frame())
 164                         return false;
 165         }
 166         return true;
 167 }
 168
 169 bool
 170 ffmpeg_mptr::grab_frame(void)
 171 {
 172         if(!file)
 173         {
 174                 cerr<<"unable to open "<<filename<<endl;
 175                 return false;
 176         }
 177         int w,h;
 178         float divisor;
 179         char cookie[2];
 180         cookie[0]=fgetc(file);
 181         cookie[1]=fgetc(file);
 182
 183         if(cookie[0]!='P' || cookie[1]!='6')
 184         {
 185                 cerr<<"stream not in PPM format \""<<cookie[0]<<cookie[1]<<'"'<<endl;
 186                 return false;
 187         }
 188
 189         fgetc(file);
 190         fscanf(file,"%d %d\n",&w,&h);
 191         fscanf(file,"%f",&divisor);
 192         fgetc(file);
 193
 194         if(feof(file))
 195                 return false;
 196
 197         int x;
 198         int y;
 199         frame.set_wh(w,h);
 200         for(y=0;y<frame.get_h();y++)
 201                 for(x=0;x<frame.get_w();x++)
 202                 {
 203                         if(feof(file))
 204                                 return false;
 205 /*
 206                         frame[y][x]=Color(
 207                                 (float)(unsigned char)fgetc(file)/divisor,
 208                                 (float)(unsigned char)fgetc(file)/divisor,
 209                                 (float)(unsigned char)fgetc(file)/divisor,
 210                                 1.0
 211 */
 212                         float r=gamma().r_U8_to_F32((unsigned char)fgetc(file));
 213                         float g=gamma().g_U8_to_F32((unsigned char)fgetc(file));
 214                         float b=gamma().b_U8_to_F32((unsigned char)fgetc(file));
 215                         frame[y][x]=Color(
 216                                 r,
 217                                 g,
 218                                 b,
 219                                 1.0
 220                         );
 221                 }
 222         cur_frame++;
 223         return true;
 224 }
 225
 226 ffmpeg_mptr::ffmpeg_mptr(const char *f)
 227 {
 228         pid=-1;
 229 #ifdef HAVE_TERMIOS_H
 230         tcgetattr (0, &oldtty);
 231 #endif
 232         filename=f;
 233         file=NULL;
 234         fps=23.98;
 235         cur_frame=-1;
 236 }
 237
 238 ffmpeg_mptr::~ffmpeg_mptr()
 239 {
 240         if(file)
 241         {
 242 #if defined(WIN32_PIPE_TO_PROCESSES)
 243                 pclose(file);
 244 #elif defined(UNIX_PIPE_TO_PROCESSES)
 245                 fclose(file);
 246                 int status;
 247                 waitpid(pid,&status,0);
 248 #endif
 249         }
 250 #ifdef HAVE_TERMIOS_H
 251         tcsetattr(0,TCSANOW,&oldtty);
 252 #endif
 253 }
 254
 255 bool
 256 ffmpeg_mptr::get_frame(synfig::Surface &surface,Time time, synfig::ProgressCallback *)
 257 {
 258         int i=(int)(time*fps);
 259         if(i!=cur_frame)
 260         {
 261                 if(!seek_to(i))
 262                         return false;
 263                 if(!grab_frame())
 264                         return false;
 265         }
 266
 267         surface=frame;
 268         return true;
 269 }