opj_compress help: revert 32572617765cb9d77302384653a48d793b8f657f and indicate 1 again as being the value to get lossless for -r. In opj_j2k_setup_encoder(), make sure that ll rates[] <= 1.0 are set to 0. Document 0 as being lossless for -q / tcp_distoratio (#1009)

1 files changed, 5 insertions, 2 deletions

diff --git a/src/lib/openjp2/openjpeg.h b/src/lib/openjp2/openjpeg.h
index 21755b48..66993b7b 100644
--- a/src/lib/openjp2/openjpeg.h
+++ b/src/lib/openjp2/openjpeg.h
@@ -381,9 +381,12 @@ typedef struct opj_cparameters {
     OPJ_UINT32 numpocs;
     /** number of layers */
     int tcp_numlayers;
-    /** rates of layers - might be subsequently limited by the max_cs_size field */
+    /** rates of layers - might be subsequently limited by the max_cs_size field.
+     * Should be decreasing. 1 can be
+     * used as last value to indicate the last layer is lossless. */
     float tcp_rates[100];
-    /** different psnr for successive layers */
+    /** different psnr for successive layers. Should be increasing. 0 can be
+     * used as last value to indicate the last layer is lossless. */
     float tcp_distoratio[100];
     /** number of resolutions */
     int numresolution;