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|
/*****************************************************************
|
| AP4 - MP4 File Processor
|
| Copyright 2002-2008 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL 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, or (at your option)
| any later version.
|
| Bento4|GPL 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 Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include "Ap4.h"
/*----------------------------------------------------------------------
| constants
+---------------------------------------------------------------------*/
#define BANNER "MP4 Atom Extractor - Version 1.0\n"\
"(Bento4 Version " AP4_VERSION_STRING ")\n"\
"(c) 2002-2008 Axiomatic Systems, LLC"
/*----------------------------------------------------------------------
| PrintUsageAndExit
+---------------------------------------------------------------------*/
static void
PrintUsageAndExit()
{
fprintf(stderr,
BANNER
"\n\nusage: mp4extract [options] <atom_path> <input> <output>\n"
" options:\n"
" --payload-only : omit the atom header\n");
exit(1);
}
/*----------------------------------------------------------------------
| main
+---------------------------------------------------------------------*/
int
main(int argc, char** argv)
{
if (argc < 4) {
PrintUsageAndExit();
}
// parse arguments
const char* atom_path = NULL;
const char* input_filename = NULL;
const char* output_filename = NULL;
bool payload_only = false;
char* arg;
while ((arg = *++argv)) {
if (!strcmp(arg, "--payload-only")) {
payload_only = true;
} else if (atom_path == NULL) {
atom_path = arg;
} else if (input_filename == NULL) {
input_filename = arg;
} else if (output_filename == NULL) {
output_filename = arg;
} else {
fprintf(stderr, "ERROR: invalid command line argument (%s)\n", arg);
return 1;
}
}
// check arguments
if (atom_path == NULL) {
fprintf(stderr, "ERROR: missing atom path\n");
return 1;
}
if (input_filename == NULL) {
fprintf(stderr, "ERROR: missing input filename\n");
return 1;
}
if (output_filename == NULL) {
fprintf(stderr, "ERROR: missing output filename\n");
return 1;
}
// create the input stream
AP4_Result result;
AP4_ByteStream* input = NULL;
result = AP4_FileByteStream::Create(input_filename, AP4_FileByteStream::STREAM_MODE_READ, input);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open input file (%s)\n", input_filename);
return 1;
}
// parse the atoms
AP4_AtomParent top_level;
AP4_Atom* atom;
AP4_DefaultAtomFactory atom_factory;
while (atom_factory.CreateAtomFromStream(*input, atom) == AP4_SUCCESS) {
top_level.AddChild(atom);
}
// release the input
input->Release();
// find the atom
atom = top_level.FindChild(atom_path);
if (atom == NULL) {
fprintf(stderr, "ERROR: atom '%s' not found\n", atom_path);
return 1;
}
// create the output stream
AP4_ByteStream* output = NULL;
result = AP4_FileByteStream::Create(output_filename, AP4_FileByteStream::STREAM_MODE_WRITE, output);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open output file (%s)\n", output_filename);
return 1;
}
// write the atom
if (payload_only) {
atom->WriteFields(*output);
} else {
atom->Write(*output);
}
// cleanup
output->Release();
return 0;
}
|
