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"
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_descriptors[inlink->format];
49 if (!(priv->line = av_malloc(sizeof(*priv->line) * inlink->w)))
50 return AVERROR(ENOMEM);
55 static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
57 PixdescTestContext *priv = inlink->dst->priv;
58 AVFilterLink *outlink = inlink->dst->outputs[0];
59 AVFilterBufferRef *outpicref, *for_next_filter;
62 outpicref = ff_get_video_buffer(outlink, AV_PERM_WRITE,
63 outlink->w, outlink->h);
65 return AVERROR(ENOMEM);
67 avfilter_copy_buffer_ref_props(outpicref, picref);
69 for (i = 0; i < 4; i++) {
71 h = i == 1 || i == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
72 if (outpicref->data[i]) {
73 uint8_t *data = outpicref->data[i] +
74 (outpicref->linesize[i] > 0 ? 0 : outpicref->linesize[i] * (h-1));
75 memset(data, 0, FFABS(outpicref->linesize[i]) * h);
80 if (priv->pix_desc->flags & PIX_FMT_PAL ||
81 priv->pix_desc->flags & PIX_FMT_PSEUDOPAL)
82 memcpy(outpicref->data[1], picref->data[1], AVPALETTE_SIZE);
84 for_next_filter = avfilter_ref_buffer(outpicref, ~0);
86 ret = ff_start_frame(outlink, for_next_filter);
88 ret = AVERROR(ENOMEM);
91 avfilter_unref_bufferp(&outpicref);
95 outlink->out_buf = outpicref;
99 static int draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
101 PixdescTestContext *priv = inlink->dst->priv;
102 AVFilterBufferRef *inpic = inlink->cur_buf;
103 AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
104 int i, c, w = inlink->w;
106 for (c = 0; c < priv->pix_desc->nb_components; c++) {
107 int w1 = c == 1 || c == 2 ? w>>priv->pix_desc->log2_chroma_w : w;
108 int h1 = c == 1 || c == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
109 int y1 = c == 1 || c == 2 ? y>>priv->pix_desc->log2_chroma_h : y;
111 for (i = y1; i < y1 + h1; i++) {
112 av_read_image_line(priv->line,
118 av_write_image_line(priv->line,
126 return ff_draw_slice(inlink->dst->outputs[0], y, h, slice_dir);
129 AVFilter avfilter_vf_pixdesctest = {
130 .name = "pixdesctest",
131 .description = NULL_IF_CONFIG_SMALL("Test pixel format definitions."),
133 .priv_size = sizeof(PixdescTestContext),
136 .inputs = (const AVFilterPad[]) {{ .name = "default",
137 .type = AVMEDIA_TYPE_VIDEO,
138 .start_frame = start_frame,
139 .draw_slice = draw_slice,
140 .config_props = config_props,
141 .min_perms = AV_PERM_READ, },
144 .outputs = (const AVFilterPad[]) {{ .name = "default",
145 .type = AVMEDIA_TYPE_VIDEO, },