Hi!
Attached patch improves output for some ffv1 files imo.
Current slowdown for the existing decode-line timer is
2%, I wonder if this can be improved through refactoring.
Please comment, Carl Eugen
From e4e8277d4f0daeb9f61c2da9ebb167a084b1b93c Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <ceho...@ag.or.at>
Date: Wed, 16 Nov 2016 12:03:17 +0100
Subject: [PATCH] lavc/ffv1dec: Scale output for msb-packed compression to
full 16bit.
2% slowdown for existing decode-line timer.
---
libavcodec/ffv1dec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c
index d8f35c3..0719e28 100644
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@@ -142,7 +142,7 @@ static void decode_plane(FFV1Context *s, uint8_t *src,
}
} else {
for (x = 0; x < w; x++) {
- ((uint16_t*)(src + stride*y))[x*pixel_stride] =
sample[1][x] << (16 - s->avctx->bits_per_raw_sample);
+ ((uint16_t*)(src + stride*y))[x*pixel_stride] =
sample[1][x] << (16 - s->avctx->bits_per_raw_sample) | ((uint16_t
**)sample)[1][x] >> (2 * s->avctx->bits_per_raw_sample - 16);
}
}
}
--
1.7.10.4
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