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/*
* Copyright (c) 2009 Stefano Sabatini
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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}},
};
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