diff options
Diffstat (limited to 'src/lib/openjp2/mqc_inl.h')
| -rw-r--r-- | src/lib/openjp2/mqc_inl.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/lib/openjp2/mqc_inl.h b/src/lib/openjp2/mqc_inl.h index 7e1c17d1..e6558c59 100644 --- a/src/lib/openjp2/mqc_inl.h +++ b/src/lib/openjp2/mqc_inl.h @@ -93,6 +93,10 @@ static INLINE void opj_mqc_bytein(opj_mqc_t *const mqc) #else static INLINE void opj_mqc_bytein(opj_mqc_t *const mqc) { + /* Implements ISO 15444-1 C.3.4 Compressed image data input (BYTEIN) */ + /* Note: alternate "J.3 - Inserting a new byte into the C register in the */ + /* software-conventions decoder" has been tried, but does not bring any */ + /* improvement. See https://github.com/uclouvain/openjpeg/issues/921 */ if (mqc->bp != mqc->end) { OPJ_UINT32 c; if (mqc->bp + 1 != mqc->end) { @@ -144,6 +148,10 @@ Decode a symbol */ static INLINE OPJ_INT32 opj_mqc_decode(opj_mqc_t *const mqc) { + /* Implements ISO 15444-1 C.3.2 Decoding a decision (DECODE) */ + /* Note: alternate "J.2 - Decoding an MPS or an LPS in the */ + /* software-conventions decoder" has been tried, but does not bring any */ + /* improvement. See https://github.com/uclouvain/openjpeg/issues/921 */ OPJ_INT32 d; mqc->a -= (*mqc->curctx)->qeval; if ((mqc->c >> 16) < (*mqc->curctx)->qeval) { |