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| author | Luca Barbato <lu_zero@gentoo.org> | 2016-02-22 19:58:19 -0500 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2016-03-16 11:32:51 +0100 |
| commit | 73f3c8f73edf0a69502233b2c50fa9e7104f99ec (patch) | |
| tree | 677003db7de49208db5fc12d16f2ec142ae04dec /libavcodec/indeo2.c | |
| parent | 522ab0b9a92962edda7156a91a494a1e2b8a7f64 (diff) | |
| download | ffmpeg-73f3c8f73edf0a69502233b2c50fa9e7104f99ec.tar.gz | |
indeo2: Fix banding artefacts
Rename luma table to delta table and change how it is used.
CC: libav-stable@libav.org
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: Diego Biurrun <diego@biurrun.de>
(cherry picked from commit f8c34f4b8d62afad3f63cf3d9617d73735bef8c1)
Diffstat (limited to 'libavcodec/indeo2.c')
| -rw-r--r-- | libavcodec/indeo2.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/libavcodec/indeo2.c b/libavcodec/indeo2.c index 3424e00b38..17f236761d 100644 --- a/libavcodec/indeo2.c +++ b/libavcodec/indeo2.c @@ -146,6 +146,7 @@ static int ir2_decode_frame(AVCodecContext *avctx, AVFrame *picture = data; AVFrame * const p = s->picture; int start, ret; + int ltab, ctab; if ((ret = ff_reget_buffer(avctx, p)) < 0) return ret; @@ -168,34 +169,36 @@ static int ir2_decode_frame(AVCodecContext *avctx, if ((ret = init_get_bits8(&s->gb, buf + start, buf_size - start)) < 0) return ret; + ltab = buf[0x22] & 3; + ctab = buf[0x22] >> 2; if (s->decode_delta) { /* intraframe */ if ((ret = ir2_decode_plane(s, avctx->width, avctx->height, p->data[0], p->linesize[0], - ir2_luma_table)) < 0) + ir2_delta_table[ltab])) < 0) return ret; /* swapped U and V */ if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2, p->data[2], p->linesize[2], - ir2_luma_table)) < 0) + ir2_delta_table[ctab])) < 0) return ret; if ((ret = ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2, p->data[1], p->linesize[1], - ir2_luma_table)) < 0) + ir2_delta_table[ctab])) < 0) return ret; } else { /* interframe */ if ((ret = ir2_decode_plane_inter(s, avctx->width, avctx->height, p->data[0], p->linesize[0], - ir2_luma_table)) < 0) + ir2_delta_table[ltab])) < 0) return ret; /* swapped U and V */ if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2, p->data[2], p->linesize[2], - ir2_luma_table)) < 0) + ir2_delta_table[ctab])) < 0) return ret; if ((ret = ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2, p->data[1], p->linesize[1], - ir2_luma_table)) < 0) + ir2_delta_table[ctab])) < 0) return ret; } |