denuvo-ref/precomp-cpp
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JPG recompression ("-r") in memory for files up to 64 MB

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- Related: Issue #14
This commit is contained in:
Christian Schneider 2016-04-21 14:56:38 +02:00
parent a00e0ff5bd
commit 5edc074b4d
1 changed files with 77 additions and 37 deletions
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114
precomp.cpp
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@ -4718,31 +4718,42 @@ while (fin_pos < fin_length) {
printf("Recompressed Length: %i - Decompressed length: %i\n", recompressed_data_length, decompressed_data_length);
}
remove(tempfile1);
ftempout = tryOpen(tempfile1,"wb");
fast_copy(fin, ftempout, decompressed_data_length);
safe_fclose(&ftempout);
remove(tempfile2);
char recompress_msg[256];
unsigned char* jpg_mem_in = NULL;
unsigned char* jpg_mem_out = NULL;
unsigned int jpg_mem_out_size = -1;
bool in_memory = (recompressed_data_length <= JPG_MAX_MEMORY_SIZE);
bool recompress_success = false;
{
char msg[256];
recompress_success = pjglib_convert_file2file(tempfile1, tempfile2, msg);
if ((!recompress_success) && (DEBUG_MODE)) {
printf ("packJPG error: %s\n", msg);
}
if (in_memory) {
jpg_mem_in = new unsigned char[decompressed_data_length];
fast_copy(fin, jpg_mem_in, decompressed_data_length);
pjglib_init_streams(jpg_mem_in, 1, decompressed_data_length, jpg_mem_out, 1);
recompress_success = pjglib_convert_stream2mem(&jpg_mem_out, &jpg_mem_out_size, recompress_msg);
} else {
remove(tempfile1);
ftempout = tryOpen(tempfile1,"wb");
fast_copy(fin, ftempout, decompressed_data_length);
safe_fclose(&ftempout);
remove(tempfile2);
recompress_success = pjglib_convert_file2file(tempfile1, tempfile2, recompress_msg);
}
if (!recompress_success) {
if (DEBUG_MODE) printf ("packJPG error: %s\n", recompress_msg);
printf("Error recompressing data!");
exit(1);
}
frecomp = tryOpen(tempfile2,"rb");
if (!in_memory) {
frecomp = tryOpen(tempfile2,"rb");
}
if (mjpg_dht_used) {
long long frecomp_pos = 0;
@ -4750,37 +4761,66 @@ while (fin_pos < fin_length) {
bool found_ff = false;
int ffda_pos = -1;
do {
ffda_pos++;
if (fread(in, 1, 1, frecomp) != 1) break;
if (found_ff) {
found_ffda = (in[0] == 0xDA);
if (found_ffda) break;
found_ff = false;
} else {
found_ff = (in[0] == 0xFF);
}
} while (!found_ffda);
if (in_memory) {
do {
ffda_pos++;
if (ffda_pos >= (int)jpg_mem_out_size) break;
if (found_ff) {
found_ffda = (jpg_mem_out[ffda_pos] == 0xDA);
if (found_ffda) break;
found_ff = false;
} else {
found_ff = (jpg_mem_out[ffda_pos] == 0xFF);
}
} while (!found_ffda);
} else {
do {
ffda_pos++;
if (fread(in, 1, 1, frecomp) != 1) break;
if (found_ff) {
found_ffda = (in[0] == 0xDA);
if (found_ffda) break;
found_ff = false;
} else {
found_ff = (in[0] == 0xFF);
}
} while (!found_ffda);
}
if ((!found_ffda) || ((ffda_pos - 1 - MJPGDHT_LEN) < 0)) {
printf("ERROR: Motion JPG stream corrupted\n");
exit(1);
}
seek_64(frecomp, frecomp_pos);
fast_copy(frecomp, fout, ffda_pos - 1 - MJPGDHT_LEN);
frecomp_pos += ffda_pos - 1;
seek_64(frecomp, frecomp_pos);
fast_copy(frecomp, fout, (recompressed_data_length + MJPGDHT_LEN) - (ffda_pos - 1));
// remove motion JPG huffman table
if (in_memory) {
fast_copy(jpg_mem_out, fout, ffda_pos - 1 - MJPGDHT_LEN);
fast_copy(jpg_mem_out + (ffda_pos - 1), fout, (recompressed_data_length + MJPGDHT_LEN) - (ffda_pos - 1));
} else {
seek_64(frecomp, frecomp_pos);
fast_copy(frecomp, fout, ffda_pos - 1 - MJPGDHT_LEN);
frecomp_pos += ffda_pos - 1;
seek_64(frecomp, frecomp_pos);
fast_copy(frecomp, fout, (recompressed_data_length + MJPGDHT_LEN) - (ffda_pos - 1));
}
} else {
fast_copy(frecomp, fout, recompressed_data_length);
if (in_memory) {
fast_copy(jpg_mem_out, fout, recompressed_data_length);
} else {
fast_copy(frecomp, fout, recompressed_data_length);
}
}
safe_fclose(&frecomp);
if (in_memory) {
if (jpg_mem_in != NULL) delete[] jpg_mem_in;
if (jpg_mem_out != NULL) delete[] jpg_mem_out;
} else {
safe_fclose(&frecomp);
remove(tempfile2);
remove(tempfile1);
remove(tempfile2);
remove(tempfile1);
}
} else if (headertype == 7) { // SWF recompression