/*
- * copyright (c) 2007 Bobby Bingham
+ * Copyright (c) 2007 Bobby Bingham
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavfilter/vf_vflip.c
+ * @file
* video vertical flip filter
*/
+#include "libavutil/internal.h"
+#include "libavutil/pixdesc.h"
#include "avfilter.h"
+#include "internal.h"
+#include "video.h"
typedef struct {
int vsub; ///< vertical chroma subsampling
static int config_input(AVFilterLink *link)
{
FlipContext *flip = link->dst->priv;
- int tmp;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
- avcodec_get_chroma_sub_sample(link->format, &tmp, &flip->vsub);
+ flip->vsub = desc->log2_chroma_h;
return 0;
}
-static AVFilterPicRef *get_video_buffer(AVFilterLink *link, int perms,
+static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms,
int w, int h)
{
FlipContext *flip = link->dst->priv;
+ AVFilterBufferRef *picref;
int i;
- AVFilterPicRef *picref = avfilter_get_video_buffer(link->dst->outputs[0],
- perms, w, h);
+ if (!(perms & AV_PERM_NEG_LINESIZES))
+ return ff_default_get_video_buffer(link, perms, w, h);
+
+ picref = ff_get_video_buffer(link->dst->outputs[0], perms, w, h);
+ if (!picref)
+ return NULL;
+
+ for (i = 0; i < 4; i ++) {
+ int vsub = i == 1 || i == 2 ? flip->vsub : 0;
- picref->data[0] += (h-1) * picref->linesize[0];
- picref->linesize[0] = -picref->linesize[0];
- for (i = 1; i < 4; i ++) {
if (picref->data[i]) {
- picref->data[i] += ((h >> flip->vsub)-1) * picref->linesize[i];
+ picref->data[i] += ((h >> vsub)-1) * picref->linesize[i];
picref->linesize[i] = -picref->linesize[i];
}
}
return picref;
}
-static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
+static int filter_frame(AVFilterLink *link, AVFilterBufferRef *frame)
{
FlipContext *flip = link->dst->priv;
- AVFilterPicRef *ref2 = avfilter_ref_pic(picref, ~0);
int i;
- ref2->data[0] += (link->h-1) * ref2->linesize[0];
- ref2->linesize[0] = -ref2->linesize[0];
- for (i = 1; i < 4; i ++) {
- if (ref2->data[i]) {
- ref2->data[i] += ((link->h >> flip->vsub)-1) * ref2->linesize[i];
- ref2->linesize[i] = -ref2->linesize[i];
+ for (i = 0; i < 4; i ++) {
+ int vsub = i == 1 || i == 2 ? flip->vsub : 0;
+
+ if (frame->data[i]) {
+ frame->data[i] += ((link->h >> vsub)-1) * frame->linesize[i];
+ frame->linesize[i] = -frame->linesize[i];
}
}
- avfilter_start_frame(link->dst->outputs[0], ref2);
+ return ff_filter_frame(link->dst->outputs[0], frame);
}
+static const AVFilterPad avfilter_vf_vflip_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .get_video_buffer = get_video_buffer,
+ .filter_frame = filter_frame,
+ .config_props = config_input,
+ },
+ { NULL }
+};
-static void draw_slice(AVFilterLink *link, int y, int h)
-{
- AVFilterContext *ctx = link->dst;
-
- avfilter_draw_slice(ctx->outputs[0], link->h - (y+h), h);
-}
+static const AVFilterPad avfilter_vf_vflip_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
AVFilter avfilter_vf_vflip = {
.name = "vflip",
.priv_size = sizeof(FlipContext),
- .inputs = (AVFilterPad[]) {{ .name = "default",
- .type = CODEC_TYPE_VIDEO,
- .get_video_buffer = get_video_buffer,
- .start_frame = start_frame,
- .draw_slice = draw_slice,
- .config_props = config_input, },
- { .name = NULL}},
- .outputs = (AVFilterPad[]) {{ .name = "default",
- .type = CODEC_TYPE_VIDEO, },
- { .name = NULL}},
+ .inputs = avfilter_vf_vflip_inputs,
+ .outputs = avfilter_vf_vflip_outputs,
};