denuvo-ref/precomp-cpp
1
0
Fork 0
mirror of https://github.com/schnaader/precomp-cpp synced 2026-08-23 00:23:04 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

[WIP] brunsli compression of MJPEG data

Browse source 
- TODO brunsli decompression
This commit is contained in:
Christian Schneider 2019-11-06 17:50:44 +01:00
parent b422204c55
commit 9ebb249375
1 changed files with 52 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

52
precomp.cpp
View file

@ -92,6 +92,7 @@
using namespace std;
#include "contrib/bzip2/bzlib.h"
#include "contrib/giflib/precomp_gif.h"
#include "contrib/packjpg/precomp_jpg.h"
@ -6585,6 +6586,57 @@ void try_decompression_jpg (long long jpg_length, bool progressive_jpg) {
jpg_mem_out = NULL;
}
}
else {
if (jpegData.error == brunsli::JPEGReadError::HUFFMAN_TABLE_NOT_FOUND) {
if (DEBUG_MODE) printf("huffman table missing, trying to use Motion JPEG DHT\n");
// search 0xFF 0xDA, insert MJPGDHT (MJPGDHT_LEN bytes)
bool found_ffda = false;
bool found_ff = false;
int ffda_pos = -1;
do {
ffda_pos++;
if (ffda_pos >= jpg_length) break;
if (found_ff) {
found_ffda = (jpg_mem_in[ffda_pos] == 0xDA);
if (found_ffda) break;
found_ff = false;
}
else {
found_ff = (jpg_mem_in[ffda_pos] == 0xFF);
}
} while (!found_ffda);
if (found_ffda) {
// reinitialise jpegData
brunsli::JPEGData newJpegData;
jpegData = newJpegData;
memmove(jpg_mem_in + (ffda_pos - 1) + MJPGDHT_LEN, jpg_mem_in + (ffda_pos - 1), jpg_length - (ffda_pos - 1));
memcpy(jpg_mem_in + (ffda_pos - 1), MJPGDHT, MJPGDHT_LEN);
if (brunsli::ReadJpeg(jpg_mem_in, jpg_length + MJPGDHT_LEN, brunsli::JPEG_READ_ALL, &jpegData)) {
size_t output_size = brunsli::GetMaximumBrunsliEncodedSize(jpegData);
jpg_mem_out = new unsigned char[output_size];
if (brunsli::BrunsliEncodeJpeg(jpegData, jpg_mem_out, &output_size, use_brotli)) {
recompress_success = true;
brunsli_success = true;
brunsli_used = true;
mjpg_dht_used = true;
jpg_mem_out_size = output_size;
}
else {
if (jpg_mem_out != NULL) delete[] jpg_mem_out;
jpg_mem_out = NULL;
}
}
if (!brunsli_success) {
// revert DHT insertion
memmove(jpg_mem_in + (ffda_pos - 1), jpg_mem_in + (ffda_pos - 1) + MJPGDHT_LEN, jpg_length - (ffda_pos - 1));
}
}
}
}
if (DEBUG_MODE && !brunsli_success) {
printf("Brunsli compression failed, using packJPG fallback...\n");
}