compile Kvazaar encoder with ITpp library

configure.ac

@@ -38,6 +38,7 @@ AM_SILENT_RULES([yes])
 AC_PROG_CC
 AC_PROG_CC_C99
 AM_PROG_AR
+AC_PROG_CXX
 
 # Get fread that can read more than 2GB on 32 bit systems.
 AC_SYS_LARGEFILE
@@ -52,14 +53,31 @@ AM_CONDITIONAL([HAVE_AVX2], [test x"$flag_avx2" = x"true"])
 AM_CONDITIONAL([HAVE_SSE4_1], [test x"$flag_sse4_1" = x"true"])
 AM_CONDITIONAL([HAVE_SSE2], [test x"$flag_sse2" = x"true"])
 
-KVZ_CFLAGS="-Wall -Wtype-limits -Wvla -I$srcdir/src -ftree-vectorize -fvisibility=hidden"
+KVZ_CFLAGS="-Wall -Wtype-limits -Wvla -I$srcdir/src -I$srcdir/src/extras -ftree-vectorize -fvisibility=hidden"
 CFLAGS="$KVZ_CFLAGS $CFLAGS"
+
+AC_ARG_WITH([libcryptopp],
+    AS_HELP_STRING([--with-cryptopp],
+        [Build with libcryptopp Enables selective encryption.]))
+AS_IF([test "x$with_libcryptopp" = "xyes"], [
+    PKG_CHECK_MODULES([libcryptopp], [cryptopp],
+        AC_DEFINE([KVC_SEL_ENCRYPTION], [1], [With libcryptopp]),
+        AC_MSG_ERROR([libcryptopp not found with pkg-config])
+    )
+])
+
+CPPFLAGS="$CPPFLAGS $libcryptopp_CFLAGS"
+LIBS="$LIBS $libcryptopp_LIBS"
+
+
 CPPFLAGS="-DKVZ_DLL_EXPORTS $CPPFLAGS"
 
 AC_SEARCH_LIBS([log], [m c], [], [exit 1])
 AC_SEARCH_LIBS([pow], [m c], [], [exit 1])
 AC_SEARCH_LIBS([sqrt], [m c], [], [exit 1])
 
+
+
 # This does workarounds for pthreads on various compilers.
 AX_PTHREAD
 CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
@@ -72,10 +90,6 @@ AC_ARG_ENABLE([werror], [AS_HELP_STRING([--disable-werror], [don't treat warning
 )
 
 
-# check for getopt
-AC_CHECK_HEADER([getopt.h], [], [CFLAGS="$CFLAGS -I$srcdir/src/extras"])
-
-
 # host and cpu specific settings
 AS_CASE([$host_cpu],
         [i?86], [BITS="32" ASFLAGS="$ASFLAGS -DARCH_X86_64=0" X86="true"],
@@ -133,10 +147,8 @@ AC_SUBST([ASFLAGS])
 KVZ_API_VERSION="$ver_major:$ver_minor:$ver_release"
 AC_SUBST([KVZ_API_VERSION])
 
-
 AC_CONFIG_FILES([Makefile
                  src/Makefile
                  src/kvazaar.pc
                  tests/Makefile])
 AC_OUTPUT
-

src/Makefile.am

@@ -131,7 +131,9 @@ libkvazaar_la_SOURCES = \
 	strategyselector.c \
 	strategyselector.h \
 	extras/libmd5.c \
-	extras/libmd5.h
+	extras/libmd5.h \
+	extras/crypto.cpp \
+	extras/crypto.h
 
 libkvazaar_la_CFLAGS =
 

src/encoder_state-ctors_dtors.c

@@ -104,8 +104,10 @@ static int encoder_state_config_tile_init(encoder_state_t * const state,
   } else {
     state->tile->wf_jobs = NULL;
   }
-  
   state->tile->id = encoder->tiles_tile_id[state->tile->lcu_offset_in_ts];
+  
+  state->tile->dbs_g = InitC();
+
   return 1;
 }
 

src/encoderstate.c

@@ -1186,6 +1186,7 @@ static void encode_inter_prediction_unit(encoder_state_t * const state,
           const uint32_t mvd_hor_abs = abs(mvd_hor);
           const uint32_t mvd_ver_abs = abs(mvd_ver);
 
+
           cabac->cur_ctx = &(cabac->ctx.cu_mvd_model[0]);
           CABAC_BIN(cabac, (mvd_hor != 0), "abs_mvd_greater0_flag_hor");
           CABAC_BIN(cabac, (mvd_ver != 0), "abs_mvd_greater0_flag_ver");
@@ -1204,16 +1205,21 @@ static void encode_inter_prediction_unit(encoder_state_t * const state,
             if (mvd_hor_abs > 1) {
               kvz_cabac_write_ep_ex_golomb(cabac,mvd_hor_abs-2, 1);
             }
-
+            uint8_t mvd_hor_sign = (mvd_hor>0)?0:1;
-            CABAC_BIN_EP(cabac, (mvd_hor>0)?0:1, "mvd_sign_flag_hor");
+#if KVC_SEL_ENCRYPTION
+            mvd_hor_sign = mvd_hor^ff_get_key(&state->tile->dbs_g, 1);
+#endif
+            CABAC_BIN_EP(cabac, mvd_hor_sign, "mvd_sign_flag_hor");
           }
-
           if (ver_abs_gr0) {
             if (mvd_ver_abs > 1) {
               kvz_cabac_write_ep_ex_golomb(cabac,mvd_ver_abs-2, 1);
             }
-
+            uint8_t mvd_ver_sign = (mvd_ver>0)?0:1;
-            CABAC_BIN_EP(cabac, (mvd_ver>0)?0:1, "mvd_sign_flag_ver");
+#if KVC_SEL_ENCRYPTION
+            mvd_ver_sign = mvd_ver^ff_get_key(&state->tile->dbs_g, 1);
+#endif
+            CABAC_BIN_EP(cabac, mvd_ver_sign, "mvd_sign_flag_ver");
           }
         }
 

src/encoderstate.h

@@ -37,6 +37,7 @@
 #include "tables.h"
 #include "threadqueue.h"
 #include "videoframe.h"
+#include "extras/crypto.h"
 
 
 typedef enum {
@@ -113,6 +114,10 @@ typedef struct {
   
   //Jobs for each individual LCU of a wavefront row.
   threadqueue_job_t **wf_jobs;
+
+  // Instance of encryption generator by tile
+  Crypto_Handle       dbs_g;
+
 } encoder_state_config_tile_t;
 
 typedef struct {

src/extras/crypto.cpp

@@ -0,0 +1,119 @@
+#include <extras/crypto.h>
+#include <cryptopp/aes.h>
+#include <cryptopp/modes.h>
+#include <cryptopp/osrng.h>
+typedef struct AESDecoder {
+#if AESEncryptionStreamMode
+        CryptoPP::CFB_Mode<CryptoPP::AES>::Encryption *CFBdec;
+#else
+    CryptoPP::CFB_Mode<CryptoPP::AES>::Decryption *CFBdec;
+#endif
+
+    byte key[CryptoPP::AES::DEFAULT_KEYLENGTH], iv[CryptoPP::AES::BLOCKSIZE], out_stream_counter[CryptoPP::AES::BLOCKSIZE], counter[CryptoPP::AES::BLOCKSIZE];
+    int couter_avail, counter_index, counter_index_pos;
+} AESDecoder;
+
+
+AESDecoder* Init() {
+    int init_val[32] = {201, 75, 219, 152, 6, 245, 237, 107, 179, 194, 81, 29, 66, 98, 198, 0, 16, 213, 27, 56, 255, 127, 242, 112, 97, 126, 197, 204, 25, 59, 38, 30};
+    AESDecoder * AESdecoder = (AESDecoder *)malloc(sizeof(AESDecoder));
+    for(int i=0;i<16; i++) {
+        AESdecoder->iv [i]     = init_val[i];
+        AESdecoder->counter[i] = init_val[5+i];
+        AESdecoder->key[i]     = init_val[i+16];
+    }
+#if AESEncryptionStreamMode
+    AESdecoder->CFBdec = new CryptoPP::CFB_Mode<CryptoPP::AES >::Encryption(AESdecoder->key, CryptoPP::AES::DEFAULT_KEYLENGTH, AESdecoder->iv);
+#else
+    AESdecoder->CFBdec = new CryptoPP::CFB_Mode<CryptoPP::AES >::Decryption(AESdecoder->key, CryptoPP::AES::DEFAULT_KEYLENGTH, AESdecoder->iv);
+#endif
+    AESdecoder->couter_avail      = 0;
+    AESdecoder->counter_index     = 0;
+    AESdecoder->counter_index_pos = 0;
+    return AESdecoder;
+}
+
+void DeleteCrypto(AESDecoder * AESdecoder) {
+    if(AESdecoder)
+        free(AESdecoder);
+}
+
+void Decrypt(AESDecoder *AESdecoder, const unsigned char *in_stream, int size_bits, unsigned char  *out_stream) {
+    int nb_bytes = ceil((double)size_bits/8);
+    AESdecoder->CFBdec->ProcessData(out_stream, in_stream, nb_bytes);
+    if(size_bits&7)
+        AESdecoder->CFBdec->SetKeyWithIV(AESdecoder->key, CryptoPP::AES::DEFAULT_KEYLENGTH, AESdecoder->iv);
+    
+}
+void Incr_counter (unsigned char *counter) {
+    counter[0]++;
+}
+
+#if AESEncryptionStreamMode
+void Decrypt_counter(AESDecoder * AESdecoder) {
+    AESdecoder->CFBdec->ProcessData(AESdecoder->out_stream_counter, AESdecoder->counter, 16);
+    AESdecoder->couter_avail      = 128;
+    AESdecoder->counter_index     = 15;
+    AESdecoder->counter_index_pos = 8;
+    Incr_counter(AESdecoder->counter);
+}
+#endif
+
+#if AESEncryptionStreamMode
+unsigned int get_key (AESDecoder * AESdecoder, int nb_bits) {
+    unsigned int key_ = 0;
+    if(nb_bits > 32) {
+        printf("The Generator can not generate more than 32 bit %d \n", nb_bits);
+        return 0;
+    }
+    if( !nb_bits )
+        return 0;
+    if(!AESdecoder->couter_avail)
+        Decrypt_counter(AESdecoder);
+
+    if(AESdecoder->couter_avail >= nb_bits)
+        AESdecoder->couter_avail -= nb_bits;
+    else
+        AESdecoder->couter_avail = 0;
+    int nb = 0;
+    while( nb_bits ) {
+        if( nb_bits >= AESdecoder->counter_index_pos )
+            nb = AESdecoder->counter_index_pos;
+        else
+            nb = nb_bits;
+        key_ <<= nb;
+        key_ += (AESdecoder->out_stream_counter[AESdecoder->counter_index] & ((1<<nb)-1));
+        AESdecoder->out_stream_counter[AESdecoder->counter_index] >>= nb;
+        nb_bits -= nb;
+
+        if(AESdecoder->counter_index && nb == AESdecoder->counter_index_pos ) {
+            AESdecoder->counter_index--;
+            AESdecoder->counter_index_pos = 8;
+        } else {
+            AESdecoder->counter_index_pos -= nb;
+            if(nb_bits) {
+                Decrypt_counter(AESdecoder);
+                AESdecoder->couter_avail -=  nb_bits;
+            }
+        }
+    }
+    return key_;
+}
+#endif
+
+Crypto_Handle InitC(){
+    AESDecoder* AESdecoder = Init();
+    return AESdecoder;
+}
+#if AESEncryptionStreamMode
+unsigned int ff_get_key (Crypto_Handle *hdl, int nb_bits) {
+    return get_key ((AESDecoder*)*hdl, nb_bits);
+}
+#endif
+void DecryptC(Crypto_Handle hdl, const unsigned char *in_stream, int size_bits, unsigned char  *out_stream) {
+    Decrypt((AESDecoder*)hdl, in_stream, size_bits, out_stream);
+}
+
+void DeleteCryptoC(Crypto_Handle hdl) {
+    DeleteCryptoC(hdl);
+}

src/extras/crypto.h

@@ -0,0 +1,19 @@
+
+#include <stdio.h>
+#include <math.h>
+#define AESEncryptionStreamMode      1
+#ifdef __cplusplus
+extern "C" {
+#endif
+    typedef void* Crypto_Handle;
+    Crypto_Handle InitC();
+    void DecryptC(Crypto_Handle hdl, const unsigned char *in_stream, int size_bits, unsigned char  *out_stream);
+#if AESEncryptionStreamMode
+    unsigned int ff_get_key (Crypto_Handle *hdl, int nb_bits);
+#endif
+    void DeleteCryptoC(Crypto_Handle hdl);
+
+#ifdef __cplusplus
+}
+#endif
+