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/log.h"
20#include "libavutil/opt.h"
21
22#include "bsf.h"
23#include "bsf_internal.h"
24#include "cbs.h"
25#include "cbs_bsf.h"
26#include "cbs_vp9.h"
27
28typedef struct VP9MetadataContext {
29    CBSBSFContext common;
30
31    int color_space;
32    int color_range;
33
34    int color_warnings;
35} VP9MetadataContext;
36
37
38static 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
83static 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
90static 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)
97static 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
127static 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
134static const enum AVCodecID vp9_metadata_codec_ids[] = {
135    AV_CODEC_ID_VP9, AV_CODEC_ID_NONE,
136};
137
138const FFBitStreamFilter ff_vp9_metadata_bsf = {
139    .p.name         = "vp9_metadata",
140    .p.codec_ids    = vp9_metadata_codec_ids,
141    .p.priv_class   = &vp9_metadata_class,
142    .priv_data_size = sizeof(VP9MetadataContext),
143    .init           = &vp9_metadata_init,
144    .close          = &ff_cbs_bsf_generic_close,
145    .filter         = &ff_cbs_bsf_generic_filter,
146};
147