mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
130 lines
4.4 KiB
C
130 lines
4.4 KiB
C
/*
|
|
* Copyright (c) 2009 Stefano Sabatini
|
|
*
|
|
* 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
|
|
* pixdesc test filter
|
|
*/
|
|
|
|
#include "libavutil/pixdesc.h"
|
|
#include "avfilter.h"
|
|
|
|
typedef struct {
|
|
const AVPixFmtDescriptor *pix_desc;
|
|
uint16_t *line;
|
|
} PixdescTestContext;
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
PixdescTestContext *priv = ctx->priv;
|
|
av_freep(&priv->line);
|
|
}
|
|
|
|
static int config_props(AVFilterLink *inlink)
|
|
{
|
|
PixdescTestContext *priv = inlink->dst->priv;
|
|
|
|
priv->pix_desc = &av_pix_fmt_descriptors[inlink->format];
|
|
|
|
if (!(priv->line = av_malloc(sizeof(*priv->line) * inlink->w)))
|
|
return AVERROR(ENOMEM);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
|
|
{
|
|
PixdescTestContext *priv = inlink->dst->priv;
|
|
AVFilterLink *outlink = inlink->dst->outputs[0];
|
|
AVFilterBufferRef *outpicref;
|
|
int i;
|
|
|
|
outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
|
|
outlink->w, outlink->h);
|
|
outpicref = outlink->out_buf;
|
|
avfilter_copy_buffer_ref_props(outpicref, picref);
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
int h = outlink->h;
|
|
h = i == 1 || i == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
|
|
if (outpicref->data[i]) {
|
|
uint8_t *data = outpicref->data[i] +
|
|
(outpicref->linesize[i] > 0 ? 0 : outpicref->linesize[i] * (h-1));
|
|
memset(data, 0, FFABS(outpicref->linesize[i]) * h);
|
|
}
|
|
}
|
|
|
|
/* copy palette */
|
|
if (priv->pix_desc->flags & PIX_FMT_PAL)
|
|
memcpy(outpicref->data[1], outpicref->data[1], 256*4);
|
|
|
|
avfilter_start_frame(outlink, avfilter_ref_buffer(outpicref, ~0));
|
|
}
|
|
|
|
static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
|
|
{
|
|
PixdescTestContext *priv = inlink->dst->priv;
|
|
AVFilterBufferRef *inpic = inlink->cur_buf;
|
|
AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
|
|
int i, c, w = inlink->w;
|
|
|
|
for (c = 0; c < priv->pix_desc->nb_components; c++) {
|
|
int w1 = c == 1 || c == 2 ? w>>priv->pix_desc->log2_chroma_w : w;
|
|
int h1 = c == 1 || c == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
|
|
int y1 = c == 1 || c == 2 ? y>>priv->pix_desc->log2_chroma_h : y;
|
|
|
|
for (i = y1; i < y1 + h1; i++) {
|
|
av_read_image_line(priv->line,
|
|
inpic->data,
|
|
inpic->linesize,
|
|
priv->pix_desc,
|
|
0, i, c, w1, 0);
|
|
|
|
av_write_image_line(priv->line,
|
|
outpic->data,
|
|
outpic->linesize,
|
|
priv->pix_desc,
|
|
0, i, c, w1);
|
|
}
|
|
}
|
|
|
|
avfilter_draw_slice(inlink->dst->outputs[0], y, h, slice_dir);
|
|
}
|
|
|
|
AVFilter avfilter_vf_pixdesctest = {
|
|
.name = "pixdesctest",
|
|
.description = NULL_IF_CONFIG_SMALL("Test pixel format definitions."),
|
|
|
|
.priv_size = sizeof(PixdescTestContext),
|
|
.uninit = uninit,
|
|
|
|
.inputs = (AVFilterPad[]) {{ .name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.start_frame = start_frame,
|
|
.draw_slice = draw_slice,
|
|
.config_props = config_props,
|
|
.min_perms = AV_PERM_READ, },
|
|
{ .name = NULL}},
|
|
|
|
.outputs = (AVFilterPad[]) {{ .name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO, },
|
|
{ .name = NULL}},
|
|
};
|