mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
88beb2df98
* qatar/master: FATE: fix the asyncts test build: Drop gcc-specific warning flag from header compilation rule FATE: add a test for the asyncts audio filter. matroskadec: return more correct error code on read error. buffersrc: check ff_get_audio_buffer() for errors. lavfi: check all ff_get_video_buffer() calls for errors. lavfi: check all avfilter_ref_buffer() calls for errors. vf_select: avoid an unnecessary avfilter_ref_buffer(). buffersrc: avoid creating unnecessary buffer reference lavfi: use avfilter_unref_bufferp() where appropriate. vf_fps: add more error checks. vf_fps: fix a memleak on malloc failure. lavfi: check all ff_start_frame/draw_slice/end_frame calls for errors lavfi: add error handling to end_frame(). lavfi: add error handling to draw_slice(). lavfi: add error handling to start_frame(). Conflicts: Makefile ffplay.c libavfilter/buffersrc.c libavfilter/vf_boxblur.c libavfilter/vf_drawtext.c libavfilter/vf_fade.c libavfilter/vf_frei0r.c libavfilter/vf_hflip.c libavfilter/vf_overlay.c libavfilter/vf_pad.c libavfilter/vf_scale.c libavfilter/video.c libavfilter/vsrc_color.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 2007 Bobby Bingham
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* video vertical flip filter
|
|
*/
|
|
|
|
#include "libavutil/pixdesc.h"
|
|
#include "avfilter.h"
|
|
#include "internal.h"
|
|
#include "video.h"
|
|
|
|
typedef struct {
|
|
int vsub; ///< vertical chroma subsampling
|
|
} FlipContext;
|
|
|
|
static int config_input(AVFilterLink *link)
|
|
{
|
|
FlipContext *flip = link->dst->priv;
|
|
|
|
flip->vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms,
|
|
int w, int h)
|
|
{
|
|
FlipContext *flip = link->dst->priv;
|
|
AVFilterBufferRef *picref;
|
|
int i;
|
|
|
|
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;
|
|
|
|
if (picref->data[i]) {
|
|
picref->data[i] += (((h + (1<<vsub)-1) >> vsub)-1) * picref->linesize[i];
|
|
picref->linesize[i] = -picref->linesize[i];
|
|
}
|
|
}
|
|
|
|
return picref;
|
|
}
|
|
|
|
static int start_frame(AVFilterLink *link, AVFilterBufferRef *inpicref)
|
|
{
|
|
FlipContext *flip = link->dst->priv;
|
|
AVFilterBufferRef *outpicref = avfilter_ref_buffer(inpicref, ~0);
|
|
int i;
|
|
|
|
if (!outpicref)
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (i = 0; i < 4; i ++) {
|
|
int vsub = i == 1 || i == 2 ? flip->vsub : 0;
|
|
|
|
if (outpicref->data[i]) {
|
|
outpicref->data[i] += (((link->h + (1<<vsub)-1)>> vsub)-1) * outpicref->linesize[i];
|
|
outpicref->linesize[i] = -outpicref->linesize[i];
|
|
}
|
|
}
|
|
|
|
return ff_start_frame(link->dst->outputs[0], outpicref);
|
|
}
|
|
|
|
static int draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
|
|
{
|
|
AVFilterContext *ctx = link->dst;
|
|
|
|
return ff_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 = (const AVFilterPad[]) {{ .name = "default",
|
|
.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 = (const AVFilterPad[]) {{ .name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO, },
|
|
{ .name = NULL}},
|
|
};
|