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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 { | |
33 | const AVPixFmtDescriptor *pix_desc; | |
34 | uint16_t *line; | |
35 | } PixdescTestContext; | |
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 || | |
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 | ||
110 | static 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 | ||
120 | static const AVFilterPad avfilter_vf_pixdesctest_outputs[] = { | |
121 | { | |
122 | .name = "default", | |
123 | .type = AVMEDIA_TYPE_VIDEO, | |
124 | }, | |
125 | { NULL } | |
126 | }; | |
127 | ||
128 | AVFilter 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 | }; |