FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavutil/film_grain_params.c
Date: 2024-03-29 01:21:52
Exec Total Coverage
Lines: 0 47 0.0%
Functions: 0 3 0.0%
Branches: 0 72 0.0%

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 "pixdesc.h"
21
22 AVFilmGrainParams *av_film_grain_params_alloc(size_t *size)
23 {
24 AVFilmGrainParams *params = av_mallocz(sizeof(AVFilmGrainParams));
25
26 if (size)
27 *size = sizeof(*params);
28
29 return params;
30 }
31
32 AVFilmGrainParams *av_film_grain_params_create_side_data(AVFrame *frame)
33 {
34 AVFilmGrainParams *fgp;
35 AVFrameSideData *side_data = av_frame_new_side_data(frame,
36 AV_FRAME_DATA_FILM_GRAIN_PARAMS,
37 sizeof(AVFilmGrainParams));
38 if (!side_data)
39 return NULL;
40
41 fgp = (AVFilmGrainParams *) side_data->data;
42 *fgp = (AVFilmGrainParams) {
43 .color_range = AVCOL_RANGE_UNSPECIFIED,
44 .color_primaries = AVCOL_PRI_UNSPECIFIED,
45 .color_trc = AVCOL_TRC_UNSPECIFIED,
46 .color_space = AVCOL_SPC_UNSPECIFIED,
47 };
48
49 return fgp;
50 }
51
52 const AVFilmGrainParams *av_film_grain_params_select(const AVFrame *frame)
53 {
54 const AVFilmGrainParams *fgp, *best = NULL;
55 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
56 int bit_depth_luma, bit_depth_chroma;
57 if (!desc)
58 return NULL;
59
60 /* There are no YUV formats with different bit depth per component,
61 * so just check both against the first component for simplicity */
62 bit_depth_luma = bit_depth_chroma = desc->comp[0].depth;
63
64 for (int i = 0; i < frame->nb_side_data; i++) {
65 if (frame->side_data[i]->type != AV_FRAME_DATA_FILM_GRAIN_PARAMS)
66 continue;
67 fgp = (const AVFilmGrainParams*)frame->side_data[i]->data;
68 if (fgp->width && fgp->width > frame->width ||
69 fgp->height && fgp->height > frame->height)
70 continue;
71
72 #define CHECK(a, b, unspec) \
73 if ((a) != (unspec) && (b) != (unspec) && (a) != (b)) \
74 continue
75
76 CHECK(fgp->bit_depth_luma, bit_depth_luma, 0);
77 CHECK(fgp->bit_depth_chroma, bit_depth_chroma, 0);
78 CHECK(fgp->color_range, frame->color_range, AVCOL_RANGE_UNSPECIFIED);
79 CHECK(fgp->color_primaries, frame->color_primaries, AVCOL_PRI_UNSPECIFIED);
80 CHECK(fgp->color_trc, frame->color_trc, AVCOL_TRC_UNSPECIFIED);
81 CHECK(fgp->color_space, frame->colorspace, AVCOL_SPC_UNSPECIFIED);
82
83 switch (fgp->type) {
84 case AV_FILM_GRAIN_PARAMS_NONE:
85 continue;
86 case AV_FILM_GRAIN_PARAMS_AV1:
87 /* AOM FGS needs an exact match for the chroma resolution */
88 if (fgp->subsampling_x != desc->log2_chroma_w ||
89 fgp->subsampling_y != desc->log2_chroma_h)
90 continue;
91 break;
92 case AV_FILM_GRAIN_PARAMS_H274:
93 /* H.274 FGS can be adapted to any lower chroma resolution */
94 if (fgp->subsampling_x > desc->log2_chroma_w ||
95 fgp->subsampling_y > desc->log2_chroma_h)
96 continue;
97 break;
98 }
99
100 if (!best || best->width < fgp->width || best->height < fgp->height)
101 best = fgp;
102 }
103
104 return best;
105 }
106