FFmpeg
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vf_pixdesctest.c
Go to the documentation of this file.
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 {
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  if (!(priv->line = av_malloc(sizeof(*priv->line) * inlink->w)))
50  return AVERROR(ENOMEM);
51 
52  return 0;
53 }
54 
56 {
57  PixdescTestContext *priv = inlink->dst->priv;
58  AVFilterLink *outlink = inlink->dst->outputs[0];
59  AVFilterBufferRef *out;
60  int i, c, w = inlink->w, h = inlink->h;
61 
62  out = ff_get_video_buffer(outlink, AV_PERM_WRITE,
63  outlink->w, outlink->h);
64  if (!out) {
66  return AVERROR(ENOMEM);
67  }
68 
70 
71  for (i = 0; i < 4; i++) {
72  int h = outlink->h;
73  h = i == 1 || i == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
74  if (out->data[i]) {
75  uint8_t *data = out->data[i] +
76  (out->linesize[i] > 0 ? 0 : out->linesize[i] * (h-1));
77  memset(data, 0, FFABS(out->linesize[i]) * h);
78  }
79  }
80 
81  /* copy palette */
82  if (priv->pix_desc->flags & PIX_FMT_PAL ||
84  memcpy(out->data[1], in->data[1], AVPALETTE_SIZE);
85 
86  for (c = 0; c < priv->pix_desc->nb_components; c++) {
87  int w1 = c == 1 || c == 2 ? w>>priv->pix_desc->log2_chroma_w : w;
88  int h1 = c == 1 || c == 2 ? h>>priv->pix_desc->log2_chroma_h : h;
89 
90  for (i = 0; i < h1; i++) {
92  (void*)in->data,
93  in->linesize,
94  priv->pix_desc,
95  0, i, c, w1, 0);
96 
98  out->data,
99  out->linesize,
100  priv->pix_desc,
101  0, i, c, w1);
102  }
103  }
104 
106  return ff_filter_frame(outlink, out);
107 }
108 
110  {
111  .name = "default",
112  .type = AVMEDIA_TYPE_VIDEO,
113  .filter_frame = filter_frame,
114  .config_props = config_props,
115  .min_perms = AV_PERM_READ,
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 
132  .priv_size = sizeof(PixdescTestContext),
133  .uninit = uninit,
134 
135  .inputs = avfilter_vf_pixdesctest_inputs,
136 
137  .outputs = avfilter_vf_pixdesctest_outputs,
138 };