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   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
  81 ffmpeg_mptr::seek_to(int frame)
  82 {
  83         if(frame<cur_frame || !file)
  84         {
  85                 if(file)
  86                 {
  87 #if defined(WIN32_PIPE_TO_PROCESSES)
  88                         pclose(file);
  89 #elif defined(UNIX_PIPE_TO_PROCESSES)
  90                         fclose(file);
  91                         int status;
  92                         waitpid(pid,&status,0);
  93 #endif
  94                 }
  95
  96 #if defined(WIN32_PIPE_TO_PROCESSES)
  97
  98                 string command;
  99
 100                 command=strprintf("ffmpeg -i \"%s\" -an -f image2pipe -vcodec ppm -\n",filename.c_str());
 101
 102                 file=popen(command.c_str(),POPEN_BINARY_READ_TYPE);
 103
 104 #elif defined(UNIX_PIPE_TO_PROCESSES)
 105
 106                 int p[2];
 107
 108                 if (pipe(p)) {
 109                         cerr<<"Unable to open pipe to ffmpeg"<<endl;
 110                         return false;
 111                 };
 112
 113                 pid = fork();
 114
 115                 if (pid == -1) {
 116                         cerr<<"Unable to open pipe to ffmpeg"<<endl;
 117                         return false;
 118                 }
 119
 120                 if (pid == 0){
 121                         // Child process
 122                         // Close pipein, not needed
 123                         close(p[0]);
 124                         // Dup pipein to stdout
 125                         if( dup2( p[1], STDOUT_FILENO ) == -1 ){
 126                                 cerr<<"Unable to open pipe to ffmpeg"<<endl;
 127                                 return false;
 128                         }
 129                         // Close the unneeded pipein
 130                         close(p[1]);
 131                         execlp("ffmpeg", "ffmpeg", "-i", filename.c_str(), "-an", "-f", "image2pipe", "-vcodec", "ppm", "-", (const char *)NULL);
 132                         // We should never reach here unless the exec failed
 133                         cerr<<"Unable to open pipe to ffmpeg"<<endl;
 134                         return false;
 135                 } else {
 136                         // Parent process
 137                         // Close pipeout, not needed
 138                         close(p[1]);
 139                         // Save pipein to file handle, will read from it later
 140                         file = fdopen(p[0], "rb");
 141                 }
 142
 143 #else
 144         #error There are no known APIs for creating child processes
 145 #endif
 146
 147                 if(!file)
 148                 {
 149                         cerr<<"Unable to open pipe to ffmpeg"<<endl;
 150                         return false;
 151                 }
 152                 cur_frame=-1;
 153         }
 154
 155         while(cur_frame<frame-1)
 156         {
 157                 cerr<<"Seeking to..."<<frame<<'('<<cur_frame<<')'<<endl;
 158                 if(!grab_frame())
 159                         return false;
 160         }
 161         return true;
 162 }
 163
 164 bool
 165 ffmpeg_mptr::grab_frame(void)
 166 {
 167         if(!file)
 168         {
 169                 cerr<<"unable to open "<<filename<<endl;
 170                 return false;
 171         }
 172         int w,h;
 173         float divisor;
 174         char cookie[2];
 175         cookie[0]=fgetc(file);
 176         cookie[1]=fgetc(file);
 177
 178         if(cookie[0]!='P' || cookie[1]!='6')
 179         {
 180                 cerr<<"stream not in PPM format \""<<cookie[0]<<cookie[1]<<'"'<<endl;
 181                 return false;
 182         }
 183
 184         fgetc(file);
 185         fscanf(file,"%d %d\n",&w,&h);
 186         fscanf(file,"%f",&divisor);
 187         fgetc(file);
 188
 189         if(feof(file))
 190                 return false;
 191
 192         int x;
 193         int y;
 194         frame.set_wh(w,h);
 195         for(y=0;y<frame.get_h();y++)
 196                 for(x=0;x<frame.get_w();x++)
 197                 {
 198                         if(feof(file))
 199                                 return false;
 200 /*
 201                         frame[y][x]=Color(
 202                                 (float)(unsigned char)fgetc(file)/divisor,
 203                                 (float)(unsigned char)fgetc(file)/divisor,
 204                                 (float)(unsigned char)fgetc(file)/divisor,
 205                                 1.0
 206 */
 207                         float r=gamma().r_U8_to_F32((unsigned char)fgetc(file));
 208                         float g=gamma().g_U8_to_F32((unsigned char)fgetc(file));
 209                         float b=gamma().b_U8_to_F32((unsigned char)fgetc(file));
 210                         frame[y][x]=Color(
 211                                 r,
 212                                 g,
 213                                 b,
 214                                 1.0
 215                         );
 216                 }
 217         cur_frame++;
 218         return true;
 219 }
 220
 221 ffmpeg_mptr::ffmpeg_mptr(const char *f)
 222 {
 223         pid=-1;
 224 #ifdef HAVE_TERMIOS_H
 225         tcgetattr (0, &oldtty);
 226 #endif
 227         filename=f;
 228         file=NULL;
 229         fps=23.98;
 230         cur_frame=-1;
 231 }
 232
 233 ffmpeg_mptr::~ffmpeg_mptr()
 234 {
 235         if(file)
 236         {
 237 #if defined(WIN32_PIPE_TO_PROCESSES)
 238                 pclose(file);
 239 #elif defined(UNIX_PIPE_TO_PROCESSES)
 240                 fclose(file);
 241                 int status;
 242                 waitpid(pid,&status,0);
 243 #endif
 244         }
 245 #ifdef HAVE_TERMIOS_H
 246         tcsetattr(0,TCSANOW,&oldtty);
 247 #endif
 248 }
 249
 250 bool
 251 ffmpeg_mptr::get_frame(synfig::Surface &surface,Time time, synfig::ProgressCallback *)
 252 {
 253         int i=(int)(time*fps);
 254         if(i!=cur_frame)
 255         {
 256                 if(!seek_to(i))
 257                         return false;
 258                 if(!grab_frame())
 259                         return false;
 260         }
 261
 262         surface=frame;
 263         return false;
 264 }