Significant speed-up rate allocation by rate/distoratio ratio

- Avoid doing 128 iterations all the time, and stop when the threshold
  doesn't vary much
- Avoid calling costly opj_t2_encode_packets() repeatdly when bisecting the
  layer ratio if the truncation points haven't changed since the last
  iteration.

When used with the GDAL gdal_translate application to convert a 11977 x
8745 raster with data type UInt16 and 8 channels, the conversion time
to JPEG2000 with 20 quality layers using disto/rate allocation (
-co "IC=C8" -co "JPEG2000_DRIVER=JP2OPENJPEG" -co "PROFILE=NPJE_NUMERICALLY_LOSSLESS"
creation options of the GDAL NITF driver) goes from 5m56 wall clock
(8m20s total, 12 vCPUs) down to 1m16 wall clock (3m45 total).

1 files changed, 0 insertions, 17 deletions

diff --git a/src/lib/openjp2/tcd.h b/src/lib/openjp2/tcd.h
index 340c2bf8..7a4f3dcb 100644
--- a/src/lib/openjp2/tcd.h
+++ b/src/lib/openjp2/tcd.h
@@ -369,23 +369,6 @@ OPJ_BOOL opj_tcd_init(opj_tcd_t *p_tcd,
 OPJ_BOOL opj_tcd_init_decode_tile(opj_tcd_t *p_tcd, OPJ_UINT32 p_tile_no,
                                   opj_event_mgr_t* p_manager);
 
-void opj_tcd_makelayer_fixed(opj_tcd_t *tcd, OPJ_UINT32 layno,
-                             OPJ_UINT32 final);
-
-void opj_tcd_rateallocate_fixed(opj_tcd_t *tcd);
-
-void opj_tcd_makelayer(opj_tcd_t *tcd,
-                       OPJ_UINT32 layno,
-                       OPJ_FLOAT64 thresh,
-                       OPJ_UINT32 final);
-
-OPJ_BOOL opj_tcd_rateallocate(opj_tcd_t *tcd,
-                              OPJ_BYTE *dest,
-                              OPJ_UINT32 * p_data_written,
-                              OPJ_UINT32 len,
-                              opj_codestream_info_t *cstr_info,
-                              opj_event_mgr_t *p_manager);
-
 /**
  * Gets the maximum tile size that will be taken by the tile once decoded.
  */