/*
- * copyright (c) 2007 Bobby Bingham
+ * Copyright (c) 2007 Bobby Bingham
*
* This file is part of FFmpeg.
*
*/
/**
- * @file libavfilter/vf_vflip.c
+ * @file
* video vertical flip filter
*/
+#include "libavutil/pixdesc.h"
#include "avfilter.h"
typedef struct {
static int config_input(AVFilterLink *link)
{
FlipContext *flip = link->dst->priv;
- int tmp;
- avcodec_get_chroma_sub_sample(link->format, &tmp, &flip->vsub);
+ flip->vsub = av_pix_fmt_descriptors[link->format].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 avfilter_default_get_video_buffer(link, perms, w, h);
+
+ picref = avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
+ 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 void start_frame(AVFilterLink *link, AVFilterBufferRef *inpicref)
{
FlipContext *flip = link->dst->priv;
- AVFilterPicRef *ref2 = avfilter_ref_pic(picref, ~0);
+ AVFilterBufferRef *outpicref = avfilter_ref_buffer(inpicref, ~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 (outpicref->data[i]) {
+ outpicref->data[i] += ((link->h >> vsub)-1) * outpicref->linesize[i];
+ outpicref->linesize[i] = -outpicref->linesize[i];
}
}
- avfilter_start_frame(link->dst->outputs[0], ref2);
+ avfilter_start_frame(link->dst->outputs[0], outpicref);
}
-static void draw_slice(AVFilterLink *link, int y, int h)
+static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
{
AVFilterContext *ctx = link->dst;
- avfilter_draw_slice(ctx->outputs[0], link->h - (y+h), h);
+ avfilter_draw_slice(ctx->outputs[0], link->h - (y+h), h, -1 * slice_dir);
}
AVFilter avfilter_vf_vflip = {
.name = "vflip",
+ .description = NULL_IF_CONFIG_SMALL("Flip the input video vertically."),
+
.priv_size = sizeof(FlipContext),
.inputs = (AVFilterPad[]) {{ .name = "default",
- .type = CODEC_TYPE_VIDEO,
+ .type = AVMEDIA_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, },
+ .type = AVMEDIA_TYPE_VIDEO, },
{ .name = NULL}},
};