From: Kostya Shishkov <[email protected]> Duplicate the last one or two chroma lines.
Signed-off-by: Anton Khirnov <[email protected]> --- libavcodec/xxan.c | 15 +++++++++++++++ tests/ref/fate/xxan-wc4 | 42 +++++++++++++++++++++--------------------- 2 files changed, 36 insertions(+), 21 deletions(-) diff --git a/libavcodec/xxan.c b/libavcodec/xxan.c index c28ba2f..1fb5a05 100644 --- a/libavcodec/xxan.c +++ b/libavcodec/xxan.c @@ -45,6 +45,11 @@ static av_cold int xan_decode_init(AVCodecContext *avctx) avctx->pix_fmt = AV_PIX_FMT_YUV420P; + if (avctx->height < 3) { + 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; diff --git a/tests/ref/fate/xxan-wc4 b/tests/ref/fate/xxan-wc4 index 34857bf..88dcc98 100644 --- a/tests/ref/fate/xxan-wc4 +++ b/tests/ref/fate/xxan-wc4 @@ -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 -- 1.7.10.4 _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
