FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavutil/film_grain_params.c
Date: 2026-05-03 08:24:11
Exec Total Coverage
Lines: 45 47 95.7%
Functions: 3 3 100.0%
Branches: 56 72 77.8%
Line Branch Exec Source
1 /**
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "film_grain_params.h"
20 #include "mem.h"
21 #include "pixdesc.h"
22
23 2 AVFilmGrainParams *av_film_grain_params_alloc(size_t *size)
24 {
25 2 AVFilmGrainParams *params = av_mallocz(sizeof(AVFilmGrainParams));
26
27
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 2 if (size)
28 1 *size = sizeof(*params);
29
30 2 return params;
31 }
32
33 22 AVFilmGrainParams *av_film_grain_params_create_side_data(AVFrame *frame)
34 {
35 AVFilmGrainParams *fgp;
36 22 AVFrameSideData *side_data = av_frame_new_side_data(frame,
37 AV_FRAME_DATA_FILM_GRAIN_PARAMS,
38 sizeof(AVFilmGrainParams));
39
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 22 if (!side_data)
40 ✗ return NULL;
41
42 22 fgp = (AVFilmGrainParams *) side_data->data;
43 22 *fgp = (AVFilmGrainParams) {
44 .color_range = AVCOL_RANGE_UNSPECIFIED,
45 .color_primaries = AVCOL_PRI_UNSPECIFIED,
46 .color_trc = AVCOL_TRC_UNSPECIFIED,
47 .color_space = AVCOL_SPC_UNSPECIFIED,
48 };
49
50 22 return fgp;
51 }
52
53 21 const AVFilmGrainParams *av_film_grain_params_select(const AVFrame *frame)
54 {
55 21 const AVFilmGrainParams *fgp, *best = NULL;
56 21 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
57 int bit_depth_luma, bit_depth_chroma;
58
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 21 if (!desc)
59 1 return NULL;
60
61 /* There are no YUV formats with different bit depth per component,
62 * so just check both against the first component for simplicity */
63 20 bit_depth_luma = bit_depth_chroma = desc->comp[0].depth;
64
65
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 41 for (int i = 0; i < frame->nb_side_data; i++) {
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 21 if (frame->side_data[i]->type != AV_FRAME_DATA_FILM_GRAIN_PARAMS)
67 ✗ continue;
68 21 fgp = (const AVFilmGrainParams*)frame->side_data[i]->data;
69
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 21 if (fgp->width && fgp->width > frame->width ||
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 20 fgp->height && fgp->height > frame->height)
71 2 continue;
72
73 #define CHECK(a, b, unspec) \
74 if ((a) != (unspec) && (b) != (unspec) && (a) != (b)) \
75 continue
76
77
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 19 CHECK(fgp->bit_depth_luma, bit_depth_luma, 0);
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 18 CHECK(fgp->bit_depth_chroma, bit_depth_chroma, 0);
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 17 CHECK(fgp->color_range, frame->color_range, AVCOL_RANGE_UNSPECIFIED);
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 16 CHECK(fgp->color_primaries, frame->color_primaries, AVCOL_PRI_UNSPECIFIED);
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 15 CHECK(fgp->color_trc, frame->color_trc, AVCOL_TRC_UNSPECIFIED);
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 14 CHECK(fgp->color_space, frame->colorspace, AVCOL_SPC_UNSPECIFIED);
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 13 switch (fgp->type) {
85 1 case AV_FILM_GRAIN_PARAMS_NONE:
86 1 continue;
87 9 case AV_FILM_GRAIN_PARAMS_AV1:
88 /* AOM FGS needs an exact match for the chroma resolution */
89
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 9 if (fgp->subsampling_x != desc->log2_chroma_w ||
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 8 fgp->subsampling_y != desc->log2_chroma_h)
91 1 continue;
92 8 break;
93 3 case AV_FILM_GRAIN_PARAMS_H274:
94 /* H.274 FGS can be adapted to any lower chroma resolution */
95
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 3 if (fgp->subsampling_x > desc->log2_chroma_w ||
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 2 fgp->subsampling_y > desc->log2_chroma_h)
97 1 continue;
98 2 break;
99 }
100
101
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 10 if (!best || best->width < fgp->width || best->height < fgp->height)
102 10 best = fgp;
103 }
104
105 20 return best;
106 }
107