1/*
2 * Copyright (c) 2009 Stefano Sabatini
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21/**
22 * @file
23 * pixdesc test filter
24 */
25
26#include "libavutil/common.h"
27#include "libavutil/pixdesc.h"
28#include "avfilter.h"
29#include "internal.h"
30#include "video.h"
31
32typedef struct PixdescTestContext {
33    const AVPixFmtDescriptor *pix_desc;
34    uint16_t *line;
35} PixdescTestContext;
36
37static av_cold void uninit(AVFilterContext *ctx)
38{
39    PixdescTestContext *priv = ctx->priv;
40    av_freep(&priv->line);
41}
42
43static int config_props(AVFilterLink *inlink)
44{
45    PixdescTestContext *priv = inlink->dst->priv;
46
47    priv->pix_desc = av_pix_fmt_desc_get(inlink->format);
48
49    av_freep(&priv->line);
50    if (!(priv->line = av_malloc_array(sizeof(*priv->line), inlink->w)))
51        return AVERROR(ENOMEM);
52
53    return 0;
54}
55
56static int filter_frame(AVFilterLink *inlink, AVFrame *in)
57{
58    PixdescTestContext *priv = inlink->dst->priv;
59    AVFilterLink *outlink    = inlink->dst->outputs[0];
60    AVFrame *out;
61    int i, c, w = inlink->w, h = inlink->h;
62    const int cw = FF_CEIL_RSHIFT(w, priv->pix_desc->log2_chroma_w);
63    const int ch = FF_CEIL_RSHIFT(h, priv->pix_desc->log2_chroma_h);
64
65    out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
66    if (!out) {
67        av_frame_free(&in);
68        return AVERROR(ENOMEM);
69    }
70
71    av_frame_copy_props(out, in);
72
73    for (i = 0; i < 4; i++) {
74        const int h1 = i == 1 || i == 2 ? ch : h;
75        if (out->data[i]) {
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);
79        }
80    }
81
82    /* copy palette */
83    if (priv->pix_desc->flags & AV_PIX_FMT_FLAG_PAL ||
84        priv->pix_desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL)
85        memcpy(out->data[1], in->data[1], AVPALETTE_SIZE);
86
87    for (c = 0; c < priv->pix_desc->nb_components; c++) {
88        const int w1 = c == 1 || c == 2 ? cw : w;
89        const int h1 = c == 1 || c == 2 ? ch : h;
90
91        for (i = 0; i < h1; i++) {
92            av_read_image_line(priv->line,
93                               (void*)in->data,
94                               in->linesize,
95                               priv->pix_desc,
96                               0, i, c, w1, 0);
97
98            av_write_image_line(priv->line,
99                                out->data,
100                                out->linesize,
101                                priv->pix_desc,
102                                0, i, c, w1);
103        }
104    }
105
106    av_frame_free(&in);
107    return ff_filter_frame(outlink, out);
108}
109
110static const AVFilterPad avfilter_vf_pixdesctest_inputs[] = {
111    {
112        .name         = "default",
113        .type         = AVMEDIA_TYPE_VIDEO,
114        .filter_frame = filter_frame,
115        .config_props = config_props,
116    },
117    { NULL }
118};
119
120static const AVFilterPad avfilter_vf_pixdesctest_outputs[] = {
121    {
122        .name = "default",
123        .type = AVMEDIA_TYPE_VIDEO,
124    },
125    { NULL }
126};
127
128AVFilter ff_vf_pixdesctest = {
129    .name        = "pixdesctest",
130    .description = NULL_IF_CONFIG_SMALL("Test pixel format definitions."),
131    .priv_size   = sizeof(PixdescTestContext),
132    .uninit      = uninit,
133    .inputs      = avfilter_vf_pixdesctest_inputs,
134    .outputs     = avfilter_vf_pixdesctest_outputs,
135};
136