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xxan: properly handle odd heights.

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Duplicate the last one or two chroma lines.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
CC:libav-stable@libav.org
(cherry picked from commit 685e6f2e39)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
This commit is contained in:
Kostya Shishkov
2013-01-29 19:53:04 +01:00
committed by Reinhard Tartler
parent b7765d00f9
commit 5479e08cc4
2 changed files with 36 additions and 21 deletions
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15
libavcodec/xxan.c
View File

@@ -45,6 +45,11 @@ static av_cold int xan_decode_init(AVCodecContext *avctx)
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
if (avctx->height < 8) {
av_log(avctx, AV_LOG_ERROR, "Invalid frame height: %d.\n", avctx->height);
return AVERROR(EINVAL);
}
s->buffer_size = avctx->width * avctx->height;
s->y_buffer = av_malloc(s->buffer_size);
if (!s->y_buffer)
@@ -210,6 +215,10 @@ static int xan_decode_chroma(AVCodecContext *avctx, unsigned chroma_off)
U += s->pic.linesize[1];
V += s->pic.linesize[2];
}
if (avctx->height & 1) {
memcpy(U, U - s->pic.linesize[1], avctx->width >> 1);
memcpy(V, V - s->pic.linesize[2], avctx->width >> 1);
}
} else {
uint8_t *U2 = U + s->pic.linesize[1];
uint8_t *V2 = V + s->pic.linesize[2];
@@ -230,6 +239,12 @@ static int xan_decode_chroma(AVCodecContext *avctx, unsigned chroma_off)
U2 += s->pic.linesize[1] * 2;
V2 += s->pic.linesize[2] * 2;
}
if (avctx->height & 3) {
int lines = ((avctx->height + 1) >> 1) - (avctx->height >> 2) * 2;
memcpy(U, U - lines * s->pic.linesize[1], lines * s->pic.linesize[1]);
memcpy(V, V - lines * s->pic.linesize[2], lines * s->pic.linesize[2]);
}
}
return 0;

42
tests/ref/fate/xxan-wc4
View File

@@ -1,22 +1,22 @@
#tb 0: 1/15
0, 0, 0, 1, 79360, 0x3b0a7d1b
0, 1, 1, 1, 79360, 0x740842c3
0, 2, 2, 1, 79360, 0x85160167
0, 3, 3, 1, 79360, 0xaf510e92
0, 4, 4, 1, 79360, 0x8e290bec
0, 5, 5, 1, 79360, 0x51e981b0
0, 6, 6, 1, 79360, 0x16e52c60
0, 7, 7, 1, 79360, 0x66e1e60a
0, 8, 8, 1, 79360, 0x40fa58f6
0, 9, 9, 1, 79360, 0x00388edd
0, 10, 10, 1, 79360, 0xc74f95bf
0, 11, 11, 1, 79360, 0xf446a3fd
0, 12, 12, 1, 79360, 0x27b5eb60
0, 13, 13, 1, 79360, 0xea9266a2
0, 14, 14, 1, 79360, 0x7b6a7907
0, 15, 15, 1, 79360, 0x2be7d946
0, 16, 16, 1, 79360, 0x61881ee4
0, 17, 17, 1, 79360, 0x9214bd4f
0, 18, 18, 1, 79360, 0xeb294afe
0, 19, 19, 1, 79360, 0xc861ad55
0, 20, 20, 1, 79360, 0x3d3b6220
0, 0, 0, 1, 79360, 0x8537821b
0, 1, 1, 1, 79360, 0x110c4343
0, 2, 2, 1, 79360, 0xa85105bb
0, 3, 3, 1, 79360, 0x87431836
0, 4, 4, 1, 79360, 0x5c701720
0, 5, 5, 1, 79360, 0x20308ce4
0, 6, 6, 1, 79360, 0xe51d3794
0, 7, 7, 1, 79360, 0x80e6f1e0
0, 8, 8, 1, 79360, 0x5aff64cc
0, 9, 9, 1, 79360, 0x1a3d9ab3
0, 10, 10, 1, 79360, 0xe154a195
0, 11, 11, 1, 79360, 0x608dafdc
0, 12, 12, 1, 79360, 0x93edf73f
0, 13, 13, 1, 79360, 0x56d97281
0, 14, 14, 1, 79360, 0xe7a284e6
0, 15, 15, 1, 79360, 0xd4e5e513
0, 16, 16, 1, 79360, 0x0a952ab1
0, 17, 17, 1, 79360, 0x3b21c91c
0, 18, 18, 1, 79360, 0x943656cb
0, 19, 19, 1, 79360, 0xffbdb94b
0, 20, 20, 1, 79360, 0x74976e16