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Merge "Prevent undefined values for CODING_SCHEME type in huff_decode()." into sc-dev

This commit is contained in:
TreeHugger Robot 2021-04-30 22:05:35 +00:00 committed by Android (Google) Code Review
parent c0c3096100 a43c9f8822
commit af61f20a8d
2 changed files with 14 additions and 19 deletions
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5
libFDK/include/nlc_dec.h
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@ -1,7 +1,7 @@
/* ----------------------------------------------------------------------------- /* -----------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android Software License for The Fraunhofer FDK AAC Codec Library for Android
© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten © Copyright 1995 - 2020 Fraunhofer-Gesellschaft zur Förderung der angewandten
Forschung e.V. All rights reserved. Forschung e.V. All rights reserved.
1. INTRODUCTION 1. INTRODUCTION
@ -159,9 +159,6 @@ typedef enum {
#ifndef HUFFDEC_PARAMS #ifndef HUFFDEC_PARAMS
#define HUFFDEC_PARMS #define HUFFDEC_PARMS
#define PAIR_SHIFT 4
#define PAIR_MASK 0xf
#define MAX_ENTRIES 168 #define MAX_ENTRIES 168
#define HANDLE_HUFF_NODE const SHORT(*)[MAX_ENTRIES][2] #define HANDLE_HUFF_NODE const SHORT(*)[MAX_ENTRIES][2]

28
libFDK/src/nlc_dec.cpp
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@ -1,7 +1,7 @@
/* ----------------------------------------------------------------------------- /* -----------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android Software License for The Fraunhofer FDK AAC Codec Library for Android
© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten © Copyright 1995 - 2020 Fraunhofer-Gesellschaft zur Förderung der angewandten
Forschung e.V. All rights reserved. Forschung e.V. All rights reserved.
1. INTRODUCTION 1. INTRODUCTION
@ -568,12 +568,12 @@ bail:
static ERROR_t huff_decode(HANDLE_FDK_BITSTREAM strm, SCHAR* out_data_1, static ERROR_t huff_decode(HANDLE_FDK_BITSTREAM strm, SCHAR* out_data_1,
SCHAR* out_data_2, DATA_TYPE data_type, SCHAR* out_data_2, DATA_TYPE data_type,
DIFF_TYPE diff_type_1, DIFF_TYPE diff_type_2, DIFF_TYPE diff_type_1, DIFF_TYPE diff_type_2,
int num_val, CODING_SCHEME* cdg_scheme, int ldMode) { int num_val, PAIRING* pairing_scheme, int ldMode) {
ERROR_t err = HUFFDEC_OK; ERROR_t err = HUFFDEC_OK;
CODING_SCHEME coding_scheme = HUFF_1D;
DIFF_TYPE diff_type; DIFF_TYPE diff_type;
int i = 0; int i = 0;
ULONG data = 0;
SCHAR pair_vec[28][2]; SCHAR pair_vec[28][2];
@ -596,15 +596,13 @@ static ERROR_t huff_decode(HANDLE_FDK_BITSTREAM strm, SCHAR* out_data_1,
int hufYY; int hufYY;
/* Coding scheme */ /* Coding scheme */
data = FDKreadBits(strm, 1); coding_scheme = (CODING_SCHEME)FDKreadBits(strm, 1);
*cdg_scheme = (CODING_SCHEME)(data << PAIR_SHIFT);
if (*cdg_scheme >> PAIR_SHIFT == HUFF_2D) { if (coding_scheme == HUFF_2D) {
if ((out_data_1 != NULL) && (out_data_2 != NULL) && (ldMode == 0)) { if ((out_data_1 != NULL) && (out_data_2 != NULL) && (ldMode == 0)) {
data = FDKreadBits(strm, 1); *pairing_scheme = (PAIRING)FDKreadBits(strm, 1);
*cdg_scheme = (CODING_SCHEME)(*cdg_scheme | data);
} else { } else {
*cdg_scheme = (CODING_SCHEME)(*cdg_scheme | FREQ_PAIR); *pairing_scheme = FREQ_PAIR;
} }
} }
@ -613,7 +611,7 @@ static ERROR_t huff_decode(HANDLE_FDK_BITSTREAM strm, SCHAR* out_data_1,
hufYY2 = diff_type_2; hufYY2 = diff_type_2;
} }
switch (*cdg_scheme >> PAIR_SHIFT) { switch (coding_scheme) {
case HUFF_1D: case HUFF_1D:
p0_flag[0] = (diff_type_1 == DIFF_FREQ); p0_flag[0] = (diff_type_1 == DIFF_FREQ);
p0_flag[1] = (diff_type_2 == DIFF_FREQ); p0_flag[1] = (diff_type_2 == DIFF_FREQ);
@ -634,7 +632,7 @@ static ERROR_t huff_decode(HANDLE_FDK_BITSTREAM strm, SCHAR* out_data_1,
case HUFF_2D: case HUFF_2D:
switch (*cdg_scheme & PAIR_MASK) { switch (*pairing_scheme) {
case FREQ_PAIR: case FREQ_PAIR:
if (out_data_1 != NULL) { if (out_data_1 != NULL) {
@ -843,7 +841,7 @@ ERROR_t EcDataPairDec(DECODER_TYPE DECODER, HANDLE_FDK_BITSTREAM strm,
SCHAR* pDataVec[2] = {NULL, NULL}; SCHAR* pDataVec[2] = {NULL, NULL};
DIFF_TYPE diff_type[2] = {DIFF_FREQ, DIFF_FREQ}; DIFF_TYPE diff_type[2] = {DIFF_FREQ, DIFF_FREQ};
CODING_SCHEME cdg_scheme = HUFF_1D; PAIRING pairing = FREQ_PAIR;
DIRECTION direction = BACKWARDS; DIRECTION direction = BACKWARDS;
switch (data_type) { switch (data_type) {
@ -959,7 +957,7 @@ ERROR_t EcDataPairDec(DECODER_TYPE DECODER, HANDLE_FDK_BITSTREAM strm,
} }
/* Huffman decoding */ /* Huffman decoding */
err = huff_decode(strm, pDataVec[0], pDataVec[1], data_type, diff_type[0], err = huff_decode(strm, pDataVec[0], pDataVec[1], data_type, diff_type[0],
diff_type[1], dataBands, &cdg_scheme, diff_type[1], dataBands, &pairing,
(DECODER == SAOC_DECODER)); (DECODER == SAOC_DECODER));
if (err != HUFFDEC_OK) { if (err != HUFFDEC_OK) {
return HUFFDEC_NOTOK; return HUFFDEC_NOTOK;
@ -986,8 +984,8 @@ ERROR_t EcDataPairDec(DECODER_TYPE DECODER, HANDLE_FDK_BITSTREAM strm,
} }
} }
mixed_time_pair = (diff_type[0] != diff_type[1]) && mixed_time_pair =
((cdg_scheme & PAIR_MASK) == TIME_PAIR); (diff_type[0] != diff_type[1]) && (pairing == TIME_PAIR);
if (direction == BACKWARDS) { if (direction == BACKWARDS) {
if (diff_type[0] == DIFF_FREQ) { if (diff_type[0] == DIFF_FREQ) {