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 
35 typedef struct ProresMetadataContext {
36     const AVClass *class;
37 
38     int color_primaries;
39     int transfer_characteristics;
40     int matrix_coefficients;
41 } ProresMetadataContext;
42 
prores_metadata(AVBSFContext * bsf,AVPacket * pkt)43 static 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 
88 fail:
89     if (ret < 0)
90         av_packet_unref(pkt);
91     return ret;
92 }
93 
94 static const enum AVCodecID codec_ids[] = {
95     AV_CODEC_ID_PRORES, AV_CODEC_ID_NONE,
96 };
97 
prores_metadata_init(AVBSFContext * bsf)98 static 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)
134 static 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 
162 static 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 
169 const AVBitStreamFilter ff_prores_metadata_bsf = {
170     .name       = "prores_metadata",
171     .init       = prores_metadata_init,
172     .filter     = prores_metadata,
173     .priv_data_size = sizeof(ProresMetadataContext),
174     .priv_class = &prores_metadata_class,
175     .codec_ids  = codec_ids,
176 };
177