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opj_t2_encode_packet(): disable setting empty packet header bit to 1 when there is an empty packet 

This effectively reverts commit 2609fb8077
since it has been reported that
such packets cause decoding issues with cinema J2K hardware
decoders: https://groups.google.com/forum/#!topic/openjpeg/M7M_fLX_Bco
This commit is contained in:
Even Rouault 2018-01-08 09:38:44 +01:00
parent bdcead70d5
commit 07d526e4cb
1 changed files with 10 additions and 2 deletions
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12
src/lib/openjp2/t2.c
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@ -667,7 +667,11 @@ static OPJ_BOOL opj_t2_encode_packet(OPJ_UINT32 tileno,
opj_tcd_resolution_t *res = &tilec->resolutions[resno];
opj_bio_t *bio = 00; /* BIO component */
#ifdef ENABLE_EMPTY_PACKET_OPTIMIZATION
OPJ_BOOL packet_empty = OPJ_TRUE;
#else
OPJ_BOOL packet_empty = OPJ_FALSE;
#endif
/* <SOP 0xff91> */
if (tcp->csty & J2K_CP_CSTY_SOP) {
@ -728,6 +732,11 @@ static OPJ_BOOL opj_t2_encode_packet(OPJ_UINT32 tileno,
}
opj_bio_init_enc(bio, c, length);
#ifdef ENABLE_EMPTY_PACKET_OPTIMIZATION
/* WARNING: this code branch is disabled, since it has been reported that */
/* such packets cause decoding issues with cinema J2K hardware */
/* decoders: https://groups.google.com/forum/#!topic/openjpeg/M7M_fLX_Bco */
/* Check if the packet is empty */
/* Note: we could also skip that step and always write a packet header */
band = res->bands;
@ -755,10 +764,9 @@ static OPJ_BOOL opj_t2_encode_packet(OPJ_UINT32 tileno,
break;
}
}
#endif
opj_bio_write(bio, packet_empty ? 0 : 1, 1); /* Empty header bit */
/* Writing Packet header */
band = res->bands;
for (bandno = 0; !packet_empty &&