1/*
2 * Prores Metadata bitstream filter
3 * Copyright (c) 2018 Jokyo Images
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * @file
24 * Prores Metadata bitstream filter
25 * set frame colorspace property
26 */
27
28#include "libavutil/common.h"
29#include "libavutil/intreadwrite.h"
30#include "libavutil/opt.h"
31
32#include "bsf.h"
33#include "bsf_internal.h"
34
35typedef struct ProresMetadataContext {
36    const AVClass *class;
37
38    int color_primaries;
39    int transfer_characteristics;
40    int matrix_coefficients;
41} ProresMetadataContext;
42
43static int prores_metadata(AVBSFContext *bsf, AVPacket *pkt)
44{
45    ProresMetadataContext *ctx = bsf->priv_data;
46    int ret = 0;
47    int buf_size;
48    uint8_t *buf;
49
50    ret = ff_bsf_get_packet_ref(bsf, pkt);
51    if (ret < 0)
52        return ret;
53
54    ret = av_packet_make_writable(pkt);
55    if (ret < 0)
56        goto fail;
57
58    buf = pkt->data;
59    buf_size = pkt->size;
60
61    /* check start of the prores frame */
62    if (buf_size < 28) {
63        av_log(bsf, AV_LOG_ERROR, "not enough data in prores frame\n");
64        ret = AVERROR_INVALIDDATA;
65        goto fail;
66    }
67
68    if (AV_RL32(buf + 4) != AV_RL32("icpf")) {
69        av_log(bsf, AV_LOG_ERROR, "invalid frame header\n");
70        ret = AVERROR_INVALIDDATA;
71        goto fail;
72    }
73
74    if (AV_RB16(buf + 8) < 28) {
75        av_log(bsf, AV_LOG_ERROR, "invalid frame header size\n");
76        ret = AVERROR_INVALIDDATA;
77        goto fail;
78    }
79
80    /* set the new values */
81    if (ctx->color_primaries != -1)
82        buf[8+14] = ctx->color_primaries;
83    if (ctx->transfer_characteristics != -1)
84        buf[8+15] = ctx->transfer_characteristics;
85    if (ctx->matrix_coefficients != -1)
86        buf[8+16] = ctx->matrix_coefficients;
87
88fail:
89    if (ret < 0)
90        av_packet_unref(pkt);
91    return ret;
92}
93
94static const enum AVCodecID codec_ids[] = {
95    AV_CODEC_ID_PRORES, AV_CODEC_ID_NONE,
96};
97
98static int prores_metadata_init(AVBSFContext *bsf)
99{
100    ProresMetadataContext *ctx = bsf->priv_data;
101    /*! check options */
102    switch (ctx->color_primaries) {
103    case -1:
104    case 0:
105    case AVCOL_PRI_BT709:
106    case AVCOL_PRI_BT470BG:
107    case AVCOL_PRI_SMPTE170M:
108    case AVCOL_PRI_BT2020:
109    case AVCOL_PRI_SMPTE431:
110    case AVCOL_PRI_SMPTE432:
111        break;
112    default:
113        av_log(bsf, AV_LOG_ERROR, "Color primaries %d is not a valid value\n", ctx->color_primaries);
114        return AVERROR(EINVAL);
115    }
116
117    switch (ctx->matrix_coefficients) {
118    case -1:
119    case 0:
120    case AVCOL_SPC_BT709:
121    case AVCOL_SPC_SMPTE170M:
122    case AVCOL_SPC_BT2020_NCL:
123        break;
124    default:
125        av_log(bsf, AV_LOG_ERROR, "Colorspace %d is not a valid value\n", ctx->matrix_coefficients);
126        return AVERROR(EINVAL);
127    }
128
129    return 0;
130}
131
132#define OFFSET(x) offsetof(ProresMetadataContext, x)
133#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_BSF_PARAM)
134static const AVOption options[] = {
135    {"color_primaries", "select color primaries", OFFSET(color_primaries), AV_OPT_TYPE_INT, {.i64=-1}, -1, AVCOL_PRI_SMPTE432, FLAGS, "color_primaries"},
136    {"auto", "keep the same color primaries",  0, AV_OPT_TYPE_CONST, {.i64=-1},                     INT_MIN, INT_MAX, FLAGS, "color_primaries"},
137    {"unknown",                         NULL,  0, AV_OPT_TYPE_CONST, {.i64=0},                      INT_MIN, INT_MAX, FLAGS, "color_primaries"},
138    {"bt709",                           NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT709},        INT_MIN, INT_MAX, FLAGS, "color_primaries"},
139    {"bt470bg",                         NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT470BG},      INT_MIN, INT_MAX, FLAGS, "color_primaries"},
140    {"smpte170m",                       NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE170M},    INT_MIN, INT_MAX, FLAGS, "color_primaries"},
141    {"bt2020",                          NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT2020},       INT_MIN, INT_MAX, FLAGS, "color_primaries"},
142    {"smpte431",                        NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE431},     INT_MIN, INT_MAX, FLAGS, "color_primaries"},
143    {"smpte432",                        NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE432},     INT_MIN, INT_MAX, FLAGS, "color_primaries"},
144
145    {"color_trc", "select color transfer", OFFSET(transfer_characteristics), AV_OPT_TYPE_INT, {.i64=-1}, -1, AVCOL_TRC_NB - 1, FLAGS, "color_trc"},
146    {"auto", "keep the same color transfer",  0, AV_OPT_TYPE_CONST, {.i64=-1},                               INT_MIN, INT_MAX, FLAGS, "color_trc"},
147    {"unknown",                        NULL,  0, AV_OPT_TYPE_CONST, {.i64=0},                                INT_MIN, INT_MAX, FLAGS, "color_trc"},
148    {"bt709",                          NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT709},                  INT_MIN, INT_MAX, FLAGS, "color_trc"},
149    {"smpte2084",                      NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE2084},              INT_MIN, INT_MAX, FLAGS, "color_trc"},
150    {"arib-std-b67",                   NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_ARIB_STD_B67},           INT_MIN, INT_MAX, FLAGS, "color_trc"},
151
152    {"colorspace", "select colorspace", OFFSET(matrix_coefficients), AV_OPT_TYPE_INT, {.i64=-1}, -1,  AVCOL_SPC_BT2020_NCL, FLAGS, "colorspace"},
153    {"auto", "keep the same colorspace",  0, AV_OPT_TYPE_CONST, {.i64=-1},                            INT_MIN, INT_MAX, FLAGS, "colorspace"},
154    {"unknown",                    NULL,  0, AV_OPT_TYPE_CONST, {.i64=0},                             INT_MIN, INT_MAX, FLAGS, "colorspace"},
155    {"bt709",                      NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT709},               INT_MIN, INT_MAX, FLAGS, "colorspace"},
156    {"smpte170m",                  NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_SMPTE170M},           INT_MIN, INT_MAX, FLAGS, "colorspace"},
157    {"bt2020nc",                   NULL,  0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT2020_NCL},          INT_MIN, INT_MAX, FLAGS, "colorspace"},
158
159    { NULL },
160};
161
162static const AVClass prores_metadata_class = {
163    .class_name = "prores_metadata_bsf",
164    .item_name  = av_default_item_name,
165    .option     = options,
166    .version    = LIBAVUTIL_VERSION_INT,
167};
168
169const FFBitStreamFilter ff_prores_metadata_bsf = {
170    .p.name         = "prores_metadata",
171    .p.codec_ids    = codec_ids,
172    .p.priv_class   = &prores_metadata_class,
173    .priv_data_size = sizeof(ProresMetadataContext),
174    .init           = prores_metadata_init,
175    .filter         = prores_metadata,
176};
177