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 "libavutil/avstring.h"
20 #include "libavutil/common.h"
21 #include "libavutil/opt.h"
22
23 #include "bsf.h"
24 #include "cbs.h"
25 #include "cbs_bsf.h"
26 #include "cbs_vp9.h"
27
28 typedef struct VP9MetadataContext {
29 CBSBSFContext common;
30
31 int color_space;
32 int color_range;
33
34 int color_warnings;
35 } VP9MetadataContext;
36
37
vp9_metadata_update_fragment(AVBSFContext * bsf,AVPacket * pkt,CodedBitstreamFragment * frag)38 static int vp9_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt,
39 CodedBitstreamFragment *frag)
40 {
41 VP9MetadataContext *ctx = bsf->priv_data;
42 int i;
43
44 for (i = 0; i < frag->nb_units; i++) {
45 VP9RawFrame *frame = frag->units[i].content;
46 VP9RawFrameHeader *header = &frame->header;
47 int profile = (header->profile_high_bit << 1) + header->profile_low_bit;
48
49 if (header->frame_type == VP9_KEY_FRAME ||
50 header->intra_only && profile > 0) {
51 if (ctx->color_space >= 0) {
52 if (!(profile & 1) && ctx->color_space == VP9_CS_RGB) {
53 if (!(ctx->color_warnings & 2)) {
54 av_log(bsf, AV_LOG_WARNING, "Warning: RGB "
55 "incompatible with profiles 0 and 2.\n");
56 ctx->color_warnings |= 2;
57 }
58 } else
59 header->color_space = ctx->color_space;
60 }
61
62 if (ctx->color_range >= 0)
63 header->color_range = ctx->color_range;
64 if (header->color_space == VP9_CS_RGB) {
65 if (!(ctx->color_warnings & 1) && !header->color_range) {
66 av_log(bsf, AV_LOG_WARNING, "Warning: Color space RGB "
67 "implicitly sets color range to PC range.\n");
68 ctx->color_warnings |= 1;
69 }
70 header->color_range = 1;
71 }
72 } else if (!(ctx->color_warnings & 4) && header->intra_only && !profile &&
73 ctx->color_space >= 0 && ctx->color_space != VP9_CS_BT_601) {
74 av_log(bsf, AV_LOG_WARNING, "Warning: Intra-only frames in "
75 "profile 0 are automatically BT.601.\n");
76 ctx->color_warnings |= 4;
77 }
78 }
79
80 return 0;
81 }
82
83 static const CBSBSFType vp9_metadata_type = {
84 .codec_id = AV_CODEC_ID_VP9,
85 .fragment_name = "superframe",
86 .unit_name = "frame",
87 .update_fragment = &vp9_metadata_update_fragment,
88 };
89
vp9_metadata_init(AVBSFContext * bsf)90 static int vp9_metadata_init(AVBSFContext *bsf)
91 {
92 return ff_cbs_bsf_generic_init(bsf, &vp9_metadata_type);
93 }
94
95 #define OFFSET(x) offsetof(VP9MetadataContext, x)
96 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
97 static const AVOption vp9_metadata_options[] = {
98 { "color_space", "Set colour space (section 7.2.2)",
99 OFFSET(color_space), AV_OPT_TYPE_INT,
100 { .i64 = -1 }, -1, VP9_CS_RGB, FLAGS, "cs" },
101 { "unknown", "Unknown/unspecified", 0, AV_OPT_TYPE_CONST,
102 { .i64 = VP9_CS_UNKNOWN }, .flags = FLAGS, .unit = "cs" },
103 { "bt601", "ITU-R BT.601-7", 0, AV_OPT_TYPE_CONST,
104 { .i64 = VP9_CS_BT_601 }, .flags = FLAGS, .unit = "cs" },
105 { "bt709", "ITU-R BT.709-6", 0, AV_OPT_TYPE_CONST,
106 { .i64 = VP9_CS_BT_709 }, .flags = FLAGS, .unit = "cs" },
107 { "smpte170", "SMPTE-170", 0, AV_OPT_TYPE_CONST,
108 { .i64 = VP9_CS_SMPTE_170 }, .flags = FLAGS, .unit = "cs" },
109 { "smpte240", "SMPTE-240", 0, AV_OPT_TYPE_CONST,
110 { .i64 = VP9_CS_SMPTE_240 }, .flags = FLAGS, .unit = "cs" },
111 { "bt2020", "ITU-R BT.2020-2", 0, AV_OPT_TYPE_CONST,
112 { .i64 = VP9_CS_BT_2020 }, .flags = FLAGS, .unit = "cs" },
113 { "rgb", "sRGB / IEC 61966-2-1", 0, AV_OPT_TYPE_CONST,
114 { .i64 = VP9_CS_RGB }, .flags = FLAGS, .unit = "cs" },
115
116 { "color_range", "Set colour range (section 7.2.2)",
117 OFFSET(color_range), AV_OPT_TYPE_INT,
118 { .i64 = -1 }, -1, 1, FLAGS, "cr" },
119 { "tv", "TV (limited) range", 0, AV_OPT_TYPE_CONST,
120 { .i64 = 0 }, .flags = FLAGS, .unit = "cr" },
121 { "pc", "PC (full) range", 0, AV_OPT_TYPE_CONST,
122 { .i64 = 1 }, .flags = FLAGS, .unit = "cr" },
123
124 { NULL }
125 };
126
127 static const AVClass vp9_metadata_class = {
128 .class_name = "vp9_metadata_bsf",
129 .item_name = av_default_item_name,
130 .option = vp9_metadata_options,
131 .version = LIBAVUTIL_VERSION_INT,
132 };
133
134 static const enum AVCodecID vp9_metadata_codec_ids[] = {
135 AV_CODEC_ID_VP9, AV_CODEC_ID_NONE,
136 };
137
138 const AVBitStreamFilter ff_vp9_metadata_bsf = {
139 .name = "vp9_metadata",
140 .priv_data_size = sizeof(VP9MetadataContext),
141 .priv_class = &vp9_metadata_class,
142 .init = &vp9_metadata_init,
143 .close = &ff_cbs_bsf_generic_close,
144 .filter = &ff_cbs_bsf_generic_filter,
145 .codec_ids = vp9_metadata_codec_ids,
146 };
147