mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-11-24 20:19:55 +00:00
ba87f0801d
Passing an explicit filename to this command is only necessary if the documentation in the @file block refers to a file different from the one the block resides in. Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/*
|
|
* 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
|
|
* null video source
|
|
*/
|
|
|
|
#include "avfilter.h"
|
|
|
|
typedef struct {
|
|
int w, h;
|
|
} NullContext;
|
|
|
|
static int init(AVFilterContext *ctx, const char *args, void *opaque)
|
|
{
|
|
NullContext *priv = ctx->priv;
|
|
|
|
priv->w = 352;
|
|
priv->h = 288;
|
|
|
|
if (args)
|
|
sscanf(args, "%d:%d", &priv->w, &priv->h);
|
|
|
|
if (priv->w <= 0 || priv->h <= 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Non-positive size values are not acceptable.\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int config_props(AVFilterLink *outlink)
|
|
{
|
|
NullContext *priv = outlink->src->priv;
|
|
|
|
outlink->w = priv->w;
|
|
outlink->h = priv->h;
|
|
|
|
av_log(outlink->src, AV_LOG_INFO, "w:%d h:%d\n", priv->w, priv->h);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int request_frame(AVFilterLink *link)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
AVFilter avfilter_vsrc_nullsrc = {
|
|
.name = "nullsrc",
|
|
.description = "Null video source, never return images.",
|
|
|
|
.init = init,
|
|
.priv_size = sizeof(NullContext),
|
|
|
|
.inputs = (AVFilterPad[]) {{ .name = NULL}},
|
|
|
|
.outputs = (AVFilterPad[]) {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_props,
|
|
.request_frame = request_frame,
|
|
},
|
|
{ .name = NULL}
|
|
},
|
|
};
|