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/*
* 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/common.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
#include "video.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_desc_get(inlink->format);
if (!(priv->line = av_malloc(sizeof(*priv->line) * inlink->w)))
return AVERROR(ENOMEM);
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *in)
{
PixdescTestContext *priv = inlink->dst->priv;
AVFilterLink *outlink = inlink->dst->outputs[0];
AVFilterBufferRef *out;
int i, c, w = inlink->w, h = inlink->h;
out = ff_get_video_buffer(outlink, AV_PERM_WRITE,
outlink->w, outlink->h);
if (!out) {
avfilter_unref_bufferp(&in);
return AVERROR(ENOMEM);
}
avfilter_copy_buffer_ref_props(out, in);
for (i = 0; i < 4; i++) {
int h = outlink->h;
h = i == 1 || i == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
if (out->data[i]) {
uint8_t *data = out->data[i] +
(out->linesize[i] > 0 ? 0 : out->linesize[i] * (h-1));
memset(data, 0, FFABS(out->linesize[i]) * h);
}
}
/* copy palette */
if (priv->pix_desc->flags & PIX_FMT_PAL ||
priv->pix_desc->flags & PIX_FMT_PSEUDOPAL)
memcpy(out->data[1], in->data[1], AVPALETTE_SIZE);
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;
for (i = 0; i < h1; i++) {
av_read_image_line(priv->line,
(void*)in->data,
in->linesize,
priv->pix_desc,
0, i, c, w1, 0);
av_write_image_line(priv->line,
out->data,
out->linesize,
priv->pix_desc,
0, i, c, w1);
}
}
avfilter_unref_bufferp(&in);
return ff_filter_frame(outlink, out);
}
static const AVFilterPad avfilter_vf_pixdesctest_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_props,
.min_perms = AV_PERM_READ,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_pixdesctest_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter avfilter_vf_pixdesctest = {
.name = "pixdesctest",
.description = NULL_IF_CONFIG_SMALL("Test pixel format definitions."),
.priv_size = sizeof(PixdescTestContext),
.uninit = uninit,
.inputs = avfilter_vf_pixdesctest_inputs,
.outputs = avfilter_vf_pixdesctest_outputs,
};
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