2 * Copyright (c) 2009 Stefano Sabatini
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "libavutil/common.h"
27 #include "libavutil/pixdesc.h"
32 typedef struct PixdescTestContext {
33 const AVPixFmtDescriptor *pix_desc;
37 static av_cold void uninit(AVFilterContext *ctx)
39 PixdescTestContext *priv = ctx->priv;
40 av_freep(&priv->line);
43 static int config_props(AVFilterLink *inlink)
45 PixdescTestContext *priv = inlink->dst->priv;
47 priv->pix_desc = av_pix_fmt_desc_get(inlink->format);
49 av_freep(&priv->line);
50 if (!(priv->line = av_malloc_array(sizeof(*priv->line), inlink->w)))
51 return AVERROR(ENOMEM);
56 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
58 PixdescTestContext *priv = inlink->dst->priv;
59 AVFilterLink *outlink = inlink->dst->outputs[0];
61 int i, c, w = inlink->w, h = inlink->h;
62 const int cw = AV_CEIL_RSHIFT(w, priv->pix_desc->log2_chroma_w);
63 const int ch = AV_CEIL_RSHIFT(h, priv->pix_desc->log2_chroma_h);
65 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
68 return AVERROR(ENOMEM);
71 av_frame_copy_props(out, in);
73 for (i = 0; i < 4; i++) {
74 const int h1 = i == 1 || i == 2 ? ch : h;
76 uint8_t *data = out->data[i] +
77 (out->linesize[i] > 0 ? 0 : out->linesize[i] * (h1-1));
78 memset(data, 0, FFABS(out->linesize[i]) * h1);
83 if (priv->pix_desc->flags & AV_PIX_FMT_FLAG_PAL)
84 memcpy(out->data[1], in->data[1], AVPALETTE_SIZE);
86 for (c = 0; c < priv->pix_desc->nb_components; c++) {
87 const int w1 = c == 1 || c == 2 ? cw : w;
88 const int h1 = c == 1 || c == 2 ? ch : h;
90 for (i = 0; i < h1; i++) {
91 av_read_image_line2(priv->line,
97 av_write_image_line2(priv->line,
106 return ff_filter_frame(outlink, out);
109 static const AVFilterPad avfilter_vf_pixdesctest_inputs[] = {
112 .type = AVMEDIA_TYPE_VIDEO,
113 .filter_frame = filter_frame,
114 .config_props = config_props,
119 static const AVFilterPad avfilter_vf_pixdesctest_outputs[] = {
122 .type = AVMEDIA_TYPE_VIDEO,
127 AVFilter ff_vf_pixdesctest = {
128 .name = "pixdesctest",
129 .description = NULL_IF_CONFIG_SMALL("Test pixel format definitions."),
130 .priv_size = sizeof(PixdescTestContext),
132 .inputs = avfilter_vf_pixdesctest_inputs,
133 .outputs = avfilter_vf_pixdesctest_outputs,