Module: libav Branch: master Commit: 9a173575fd3bd9a4391f760484e918824204e618
Author: Kostya Shishkov <[email protected]> Committer: Ronald S. Bultje <[email protected]> Date: Fri Oct 28 20:40:23 2011 +0200 utvideo: account for coupled lines in YUV420 format Luma slices in YUV420 colourspace should have height in multiple of two since they have the same line of chrominance data corresponding to pair of them. Signed-off-by: Ronald S. Bultje <[email protected]> --- libavcodec/utvideo.c | 16 +++++++++------- 1 files changed, 9 insertions(+), 7 deletions(-) diff --git a/libavcodec/utvideo.c b/libavcodec/utvideo.c index aac3969..5faaa15 100644 --- a/libavcodec/utvideo.c +++ b/libavcodec/utvideo.c @@ -113,6 +113,7 @@ static int decode_plane(UtvideoContext *c, int plane_no, VLC vlc; GetBitContext gb; int prev; + const int cmask = ~(!plane_no && c->avctx->pix_fmt == PIX_FMT_YUV420P); if (build_huff(src, &vlc)) { av_log(c->avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n"); @@ -128,7 +129,7 @@ static int decode_plane(UtvideoContext *c, int plane_no, int slice_data_start, slice_data_end, slice_size; sstart = send; - send = height * (slice + 1) / c->slices; + send = (height * (slice + 1) / c->slices) & cmask; dest = dst + sstart * stride; // slice offset and size validation was done earlier @@ -204,16 +205,17 @@ static void restore_rgb_planes(uint8_t *src, int step, int stride, int width, in } static void restore_median(uint8_t *src, int step, int stride, - int width, int height, int slices) + int width, int height, int slices, int rmode) { int i, j, slice; int A, B, C; uint8_t *bsrc; int slice_start, slice_height; + const int cmask = ~rmode; for (slice = 0; slice < slices; slice++) { - slice_start = (slice * height) / slices; - slice_height = ((slice + 1) * height) / slices - slice_start; + slice_start = ((slice * height) / slices) & cmask; + slice_height = ((((slice + 1) * height) / slices) & cmask) - slice_start; bsrc = src + slice_start * stride; @@ -337,7 +339,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac if (c->frame_pred == PRED_MEDIAN) restore_median(c->pic.data[0] + rgb_order[i], c->planes, c->pic.linesize[0], avctx->width, avctx->height, - c->slices); + c->slices, 0); } restore_rgb_planes(c->pic.data[0], c->planes, c->pic.linesize[0], avctx->width, avctx->height); @@ -353,7 +355,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac if (c->frame_pred == PRED_MEDIAN) restore_median(c->pic.data[i], 1, c->pic.linesize[i], avctx->width >> !!i, avctx->height >> !!i, - c->slices); + c->slices, !i); } break; case PIX_FMT_YUV422P: @@ -366,7 +368,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac return ret; if (c->frame_pred == PRED_MEDIAN) restore_median(c->pic.data[i], 1, c->pic.linesize[i], - avctx->width >> !!i, avctx->height, c->slices); + avctx->width >> !!i, avctx->height, c->slices, 0); } break; } _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
