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vf_pixdesctest.c
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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 
32 typedef struct PixdescTestContext {
34  uint16_t *line;
36 
37 static av_cold void uninit(AVFilterContext *ctx)
38 {
39  PixdescTestContext *priv = ctx->priv;
40  av_freep(&priv->line);
41 }
42 
43 static 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 
56 static 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 ||
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++) {
93  (void*)in->data,
94  in->linesize,
95  priv->pix_desc,
96  0, i, c, w1, 0);
97 
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 
111  {
112  .name = "default",
113  .type = AVMEDIA_TYPE_VIDEO,
114  .filter_frame = filter_frame,
115  .config_props = config_props,
116  },
117  { NULL }
118 };
119 
121  {
122  .name = "default",
123  .type = AVMEDIA_TYPE_VIDEO,
124  },
125  { NULL }
126 };
127 
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 };