diff options
Diffstat (limited to 'libavfilter/vf_fade.c')
-rw-r--r-- | libavfilter/vf_fade.c | 30 |
1 files changed, 21 insertions, 9 deletions
diff --git a/libavfilter/vf_fade.c b/libavfilter/vf_fade.c index 0c8668c..5032019 100644 --- a/libavfilter/vf_fade.c +++ b/libavfilter/vf_fade.c @@ -2,20 +2,20 @@ * Copyright (c) 2010 Brandon Mintern * Copyright (c) 2007 Bobby Bingham * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -27,11 +27,13 @@ #include "libavutil/pixdesc.h" #include "avfilter.h" +#include "internal.h" typedef struct { int factor, fade_per_frame; unsigned int frame_index, start_frame, stop_frame; int hsub, vsub, bpp; + unsigned int black_level, black_level_scaled; } FadeContext; static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque) @@ -78,10 +80,17 @@ static int query_formats(AVFilterContext *ctx) PIX_FMT_NONE }; - avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts)); + avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts)); return 0; } +const static enum PixelFormat studio_level_pix_fmts[] = { + PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV420P, + PIX_FMT_YUV411P, PIX_FMT_YUV410P, + PIX_FMT_YUV440P, + PIX_FMT_NONE +}; + static int config_props(AVFilterLink *inlink) { FadeContext *fade = inlink->dst->priv; @@ -91,6 +100,11 @@ static int config_props(AVFilterLink *inlink) fade->vsub = pixdesc->log2_chroma_h; fade->bpp = av_get_bits_per_pixel(pixdesc) >> 3; + + fade->black_level = ff_fmt_is_in(inlink->format, studio_level_pix_fmts) ? 16 : 0; + /* 32768 = 1 << 15, it is an integer representation + * of 0.5 and is for rounding. */ + fade->black_level_scaled = (fade->black_level << 16) + 32768; return 0; } @@ -106,10 +120,8 @@ static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) for (i = 0; i < h; i++) { p = outpic->data[0] + (y+i) * outpic->linesize[0]; for (j = 0; j < inlink->w * fade->bpp; j++) { - /* fade->factor is using 16 lower-order bits for decimal - * places. 32768 = 1 << 15, it is an integer representation - * of 0.5 and is for rounding. */ - *p = (*p * fade->factor + 32768) >> 16; + /* fade->factor is using 16 lower-order bits for decimal places. */ + *p = ((*p - fade->black_level) * fade->factor + fade->black_level_scaled) >> 16; p++; } } |