commit 3059e9ccf6968ff0371824fbbe6c459bd2129c8a
author Wan-Teh Chang <wtc@google.com> Tue May 09 18:45:47 2023 -0700
committer Wan-Teh Chang <wtc@google.com> Wed May 10 09:15:42 2023 -0700
tree 35ce4413af46093b7d8ac578f2995575226a5d8a
parent 8b1a771475e7073d6981d8c9b9c3e17d69bfef8b

avifenc.c: Change error message on lossless codec

Instead of saying the codec can only be AOM (or AVM) in lossless mode,
say a particular codec doesn't support lossless encoding yet, with a
link to its feature request for lossless support.

apps/avifenc.c

diff --git a/apps/avifenc.c b/apps/avifenc.c
index 16ccbcf..8799f8e 100644
--- a/apps/avifenc.c
+++ b/apps/avifenc.c
@@ -1464,16 +1464,13 @@
         }
         settings.minQuantizer = settings.maxQuantizer = settings.minQuantizerAlpha = settings.maxQuantizerAlpha = AVIF_QUANTIZER_LOSSLESS;
         // Codec.
-        if (settings.codecChoice != AVIF_CODEC_CHOICE_AUTO && settings.codecChoice != AVIF_CODEC_CHOICE_AOM &&
-            settings.codecChoice != AVIF_CODEC_CHOICE_AVM) {
-            fprintf(stderr, "Codec can only be AOM in lossless mode.\n");
+        if (settings.codecChoice == AVIF_CODEC_CHOICE_RAV1E) {
+            fprintf(stderr, "rav1e doesn't support lossless encoding yet: https://github.com/xiph/rav1e/issues/151\n");
             returnCode = 1;
-        }
-        // rav1e doesn't support lossless transform yet:
-        // https://github.com/xiph/rav1e/issues/151
-        // SVT-AV1 doesn't support lossless encoding yet:
-        // https://gitlab.com/AOMediaCodec/SVT-AV1/-/issues/1636
-        if (settings.codecChoice == AVIF_CODEC_CHOICE_AUTO) {
+        } else if (settings.codecChoice == AVIF_CODEC_CHOICE_SVT) {
+            fprintf(stderr, "SVT-AV1 doesn't support lossless encoding yet: https://gitlab.com/AOMediaCodec/SVT-AV1/-/issues/1636\n");
+            returnCode = 1;
+        } else if (settings.codecChoice == AVIF_CODEC_CHOICE_AUTO) {
             settings.codecChoice = AVIF_CODEC_CHOICE_AOM;
         }
         // Range.