]> git.sesse.net Git - ffmpeg/blob - libavfilter/vf_pixdesctest.c
Deprecate av_parse_video_frame_size() and av_parse_video_frame_rate()
[ffmpeg] / libavfilter / vf_pixdesctest.c
1 /*
2  * This file is part of FFmpeg.
3  * copyright (C) 2009 Stefano Sabatini
4  *
5  * FFmpeg is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * FFmpeg is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with FFmpeg; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19
20 /**
21  * @file
22  * pixdesc test filter
23  */
24
25 #include "libavutil/pixdesc.h"
26 #include "avfilter.h"
27
28 typedef struct {
29     const AVPixFmtDescriptor *pix_desc;
30     uint16_t *line;
31 } PixdescTestContext;
32
33 static av_cold void uninit(AVFilterContext *ctx)
34 {
35     PixdescTestContext *priv = ctx->priv;
36     av_freep(&priv->line);
37 }
38
39 static int config_props(AVFilterLink *inlink)
40 {
41     PixdescTestContext *priv = inlink->dst->priv;
42
43     priv->pix_desc = &av_pix_fmt_descriptors[inlink->format];
44
45     if (!(priv->line = av_malloc(sizeof(*priv->line) * inlink->w)))
46         return AVERROR(ENOMEM);
47
48     return 0;
49 }
50
51 static void start_frame(AVFilterLink *inlink, AVFilterPicRef *picref)
52 {
53     PixdescTestContext *priv = inlink->dst->priv;
54     AVFilterLink *outlink    = inlink->dst->outputs[0];
55     AVFilterPicRef *outpicref;
56     int i;
57
58     outlink->outpic = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
59                                                 outlink->w, outlink->h);
60     outpicref = outlink->outpic;
61     avfilter_copy_picref_props(outpicref, picref);
62
63     for (i = 0; i < 4; i++) {
64         int h = outlink->h;
65         h = i == 1 || i == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
66         if (outpicref->data[i]) {
67             uint8_t *data = outpicref->data[i] +
68                 (outpicref->linesize[i] > 0 ? 0 : outpicref->linesize[i] * (h-1));
69             memset(data, 0, FFABS(outpicref->linesize[i]) * h);
70         }
71     }
72
73     /* copy palette */
74     if (priv->pix_desc->flags & PIX_FMT_PAL)
75         memcpy(outpicref->data[1], outpicref->data[1], 256*4);
76
77     avfilter_start_frame(outlink, avfilter_ref_pic(outpicref, ~0));
78 }
79
80 static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
81 {
82     PixdescTestContext *priv = inlink->dst->priv;
83     AVFilterPicRef *inpic    = inlink->cur_pic;
84     AVFilterPicRef *outpic   = inlink->dst->outputs[0]->outpic;
85     int i, c, w = inlink->w;
86
87     for (c = 0; c < priv->pix_desc->nb_components; c++) {
88         int w1 = c == 1 || c == 2 ? w>>priv->pix_desc->log2_chroma_w : w;
89         int h1 = c == 1 || c == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
90         int y1 = c == 1 || c == 2 ? y>>priv->pix_desc->log2_chroma_h : y;
91
92         for (i = y1; i < y1 + h1; i++) {
93             av_read_image_line(priv->line,
94                                inpic->data,
95                                inpic->linesize,
96                                priv->pix_desc,
97                                0, i, c, w1, 0);
98
99             av_write_image_line(priv->line,
100                                 outpic->data,
101                                 outpic->linesize,
102                                 priv->pix_desc,
103                                 0, i, c, w1);
104         }
105     }
106
107     avfilter_draw_slice(inlink->dst->outputs[0], y, h, slice_dir);
108 }
109
110 AVFilter avfilter_vf_pixdesctest = {
111     .name        = "pixdesctest",
112     .description = "Test pixel format definitions.",
113
114     .priv_size = sizeof(PixdescTestContext),
115     .uninit    = uninit,
116
117     .inputs    = (AVFilterPad[]) {{ .name            = "default",
118                                     .type            = AVMEDIA_TYPE_VIDEO,
119                                     .start_frame     = start_frame,
120                                     .draw_slice      = draw_slice,
121                                     .config_props    = config_props,
122                                     .min_perms       = AV_PERM_READ, },
123                                   { .name = NULL}},
124
125     .outputs   = (AVFilterPad[]) {{ .name            = "default",
126                                     .type            = AVMEDIA_TYPE_VIDEO, },
127                                   { .name = NULL}},
128 };