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|
/*****************************************************************
|
| AP4 - MP4 File Comparator
|
| Copyright 2002-2017 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"
#include "Ap4BitStream.h"
#include "Ap4Mp4AudioInfo.h"
#include "Ap4HevcParser.h"
/*----------------------------------------------------------------------
| constants
+---------------------------------------------------------------------*/
#define BANNER "MP4 Diff - Version 1.0.0\n"\
"(Bento4 Version " AP4_VERSION_STRING ")\n"\
"(c) 2002-2017 Axiomatic Systems, LLC"
/*----------------------------------------------------------------------
| globals
+---------------------------------------------------------------------*/
/*----------------------------------------------------------------------
| PrintUsageAndExit
+---------------------------------------------------------------------*/
static void
PrintUsageAndExit()
{
fprintf(stderr,
BANNER
"\n\nusage: mp4diff [options] <input1> <input2>\n"
);
exit(1);
}
/*----------------------------------------------------------------------
| DiffSamples
+---------------------------------------------------------------------*/
static void
DiffSamples(unsigned int index, AP4_DataBuffer& sample_data1, AP4_DataBuffer& sample_data2)
{
if (sample_data1.GetDataSize() != sample_data2.GetDataSize()) {
printf("!!! sample %d: sizes not equal: %d, %d\n", index, sample_data1.GetDataSize(), sample_data2.GetDataSize());
return;
}
const AP4_UI08* data1 = (const AP4_UI08*)sample_data1.GetData();
const AP4_UI08* data2 = (const AP4_UI08*)sample_data2.GetData();
bool in_diff = false;
unsigned int diff_start = 0;
for (unsigned int i=0; i<sample_data1.GetDataSize(); i++) {
if (in_diff) {
if (data1[i] == data2[i]) {
// end of diff
printf("!!! sample %d, %d differences at %d / %d\n", index, i-diff_start, diff_start, sample_data1.GetDataSize());
in_diff = false;
}
} else {
if (data1[i] != data2[i]) {
diff_start = i;
in_diff = true;
}
}
}
if (in_diff) {
printf("!!! sample %d, %d differences at %d / %d\n", index, sample_data1.GetDataSize()-diff_start, diff_start, sample_data1.GetDataSize());
}
}
/*----------------------------------------------------------------------
| DiffFragments
+---------------------------------------------------------------------*/
static void
DiffFragments(AP4_Movie& movie1, AP4_ByteStream* stream1, AP4_Movie& movie2, AP4_ByteStream* stream2)
{
stream1->Seek(0);
stream2->Seek(0);
AP4_LinearReader reader1(movie1, stream1);
AP4_LinearReader reader2(movie2, stream2);
AP4_List<AP4_Track>::Item* track_item1 = movie1.GetTracks().FirstItem();
AP4_List<AP4_Track>::Item* track_item2 = movie2.GetTracks().FirstItem();
while (track_item1 && track_item2) {
reader1.EnableTrack(track_item1->GetData()->GetId());
reader2.EnableTrack(track_item1->GetData()->GetId());
track_item1 = track_item1->GetNext();
track_item2 = track_item2->GetNext();
}
AP4_Sample sample1;
AP4_Sample sample2;
AP4_DataBuffer sample_data1;
AP4_DataBuffer sample_data2;
AP4_UI32 prev_track_id = 0;
for(unsigned int i=0; ; i++) {
AP4_UI32 track_id1 = 0;
AP4_UI32 track_id2 = 0;
AP4_Result result1 = reader1.ReadNextSample(sample1, sample_data1, track_id1);
AP4_Result result2 = reader2.ReadNextSample(sample2, sample_data2, track_id2);
if (AP4_SUCCEEDED(result1) && AP4_SUCCEEDED(result2)) {
if (track_id1 != track_id2) {
fprintf(stderr, "!!! sample %d, track ID 1 = %d, track ID 2 = %d\n", i, track_id1, track_id2);
return;
}
if (track_id1 != prev_track_id) {
printf("Track %d:\n", track_id1);
prev_track_id = track_id1;
}
DiffSamples(i, sample_data1, sample_data2);
} else {
printf("### processed %d samples\n", i+1);
break;
}
}
}
/*----------------------------------------------------------------------
| main
+---------------------------------------------------------------------*/
int
main(int argc, char** argv)
{
if (argc < 3) {
PrintUsageAndExit();
}
const char* filename1 = NULL;
const char* filename2 = NULL;
while (char* arg = *++argv) {
if (filename1 == NULL) {
filename1 = arg;
} else if (filename2 == NULL) {
filename2 = arg;
} else {
fprintf(stderr, "ERROR: unexpected argument '%s'\n", arg);
return 1;
}
}
if (filename1 == NULL || filename2 == NULL) {
fprintf(stderr, "ERROR: filename missing\n");
return 1;
}
AP4_ByteStream* input1 = NULL;
AP4_Result result = AP4_FileByteStream::Create(filename1,
AP4_FileByteStream::STREAM_MODE_READ,
input1);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open input file %s (%d)\n", filename1, result);
return 1;
}
AP4_ByteStream* input2 = NULL;
result = AP4_FileByteStream::Create(filename2,
AP4_FileByteStream::STREAM_MODE_READ,
input2);
if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open input file %s (%d)\n", filename2, result);
return 1;
}
AP4_File* file1 = new AP4_File(*input1, true);
AP4_File* file2 = new AP4_File(*input2, true);
AP4_Movie* movie1 = file1->GetMovie();
AP4_Movie* movie2 = file2->GetMovie();
if (movie1 && movie2) {
AP4_List<AP4_Track>& tracks1 = movie1->GetTracks();
AP4_List<AP4_Track>& tracks2 = movie1->GetTracks();
if (tracks1.ItemCount() != tracks2.ItemCount()) {
fprintf(stderr, "### file 1 has %d tracks, file 2 has %d tracks\n", tracks1.ItemCount(), tracks2.ItemCount());
} else {
for (unsigned int i=0; i<tracks1.ItemCount(); i++) {
AP4_Track* track1;
AP4_Track* track2;
tracks1.Get(i, track1);
tracks2.Get(i, track2);
printf("--- comparing track ID %d\n", track1->GetId());
}
}
if (movie1->HasFragments() != movie2->HasFragments()) {
fprintf(stderr, "### file 1 fragmented=%s, file2 fragmented=%s\n",
movie1->HasFragments() ? "true" : "false",
movie2->HasFragments() ? "true" : "false");
}
if (movie1->HasFragments() && movie2->HasFragments()) {
DiffFragments(*movie1, input1, *movie2, input2);
}
}
delete file1;
delete file2;
input1->Release();
input2->Release();
return 0;
}
|
