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T1 flag optimizations (#172)#945

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rouault merged 19 commits intouclouvain:masteruclouvain/openjpeg:masterfrom rouault:t1_flag_optimizationsrouault/openjpeg:t1_flag_optimizationsCopy head branch name to clipboardJun 13, 2017

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Commits

Commits on May 23, 2017

• T1: use more compact flags to optimize cache usage in encoder passes. (uclouvain#172)

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• T1: fix VSC mode in encoder

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• T1: remove unused code in decoder

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• Optimize a bit opj_t1_enc_clnpass()

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• Factor index computation for lut_enc_ctxno_sc and lut_enc_spb

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• Fix compiler warnings

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Commits on Jun 2, 2017

• T1: Transpose coder optimizations to decoder, and cleanup code

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• T1: loop unrolling in dec_sigpass_raw and dec_refpass_raw

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• Inline opj_raw_decode()

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• T1: remove flags_stride variable from opj_t1_t

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• T1: avoid pointer indirection for mqc and raw members of opj_t1_t

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• T1: remove use of neghalf variable. It is useless since bpno is always > 0

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• Optimize opj_t1_update_flags()

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• t1_generate_luts.c: fix compiler warnings

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• Force inlining of mqc decoding and pass steps through heavy use of macros, so as to get better register allocation

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• Simplify VSC handling: instead of masking out bits when reading the 4th row.

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• Fix documentation of opj_t1_decode_cblks()

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• MQC/RAW decoder: use an artificial 0xFF 0xFF terminating marker.

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• opj_t1_dec_sigpass_raw/opj_t1_dec_refpass_raw: harmonize style with mqc methods

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