FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/dv_error_marker_bsf.c
Date: 2022-10-02 18:56:10
Exec Total Coverage
Lines: 40 42 95.2%
Branches: 17 18 94.4%

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1 /*
2 * Copyright (c) 2022 Michael Niedermayer
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "bsf.h"
22 #include "bsf_internal.h"
23 #include "libavutil/colorspace.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/opt.h"
26
27 typedef struct DVErrorMarkerContext {
28 const AVClass *class;
29 uint8_t color_rgba[4];
30 int sta;
31 uint8_t marked_block[76];
32 } DVErrorMarkerContext;
33
34 2 static void setdc(uint8_t *b, const uint8_t color_rgba[4], int cblocks, int y_step, int v_step, int u_step) {
35
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10 for (int i=0; i<4; i++) {
36 8 b[0] = RGB_TO_Y_JPEG(color_rgba[0], color_rgba[1],color_rgba[2]) + 128;
37 8 b[1] = 0x06;
38 8 b += y_step;
39 }
40
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5 for (int i=0; i<cblocks; i++) {
41 3 b[0] = RGB_TO_V_JPEG(color_rgba[0], color_rgba[1],color_rgba[2]) - 128;
42 3 b[1] = 0x16;
43 3 b += v_step;
44 }
45
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5 for (int i=0; i<cblocks; i++) {
46 3 b[0] = RGB_TO_U_JPEG(color_rgba[0], color_rgba[1],color_rgba[2]) - 128;
47 3 b[1] = 0x16;
48 3 b += u_step;
49 }
50 2 }
51
52 1 static int dv_error_marker_init(AVBSFContext *ctx)
53 {
54 1 DVErrorMarkerContext *s = ctx->priv_data;
55
56 1 memset(s->marked_block, -1, 76);
57 1 setdc(s->marked_block, s->color_rgba, 1, 14, 10, 10);
58 1 setdc(s->marked_block, s->color_rgba, 2, 10, 10, 8);
59
60 1 return 0;
61 }
62
63 4 static int dv_error_marker_filter(AVBSFContext *ctx, AVPacket *pkt)
64 {
65 4 DVErrorMarkerContext *s = ctx->priv_data;
66 4 int ret = ff_bsf_get_packet_ref(ctx, pkt);
67 uint8_t *p;
68 4 int writable = 0;
69 4 int stamask = s->sta;
70 4 int match_count = 0;
71
72
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4 if (ret < 0)
73 3 return ret;
74
75 1 p = pkt->data;
76
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3601 for(int i = 0; i < pkt->size - 79; i+=80) {
77 // see page 44-46 or section 5.5 of http://web.archive.org/web/20060927044735/http://www.smpte.org/smpte_store/standards/pdf/s314m.pdf.
78
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3600 if ((p[i] >> 4) == 9 && ((stamask >> (p[i+3] >> 4))&1)) {
79
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38 if (!writable) {
80 1 ret = av_packet_make_writable(pkt);
81
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1 if (ret < 0) {
82 av_packet_unref(pkt);
83 return ret;
84 }
85 1 writable = 1;
86 1 p = pkt->data;
87 }
88 38 memcpy(p+i+4, s->marked_block, 76);
89 38 match_count ++;
90 }
91 }
92 1 av_log(ctx, AV_LOG_DEBUG, "%8"PRId64": Replaced %5d blocks by color %X\n", pkt->pts, match_count, AV_RB32(s->color_rgba));
93
94 1 return 0;
95 }
96
97 #define OFFSET(x) offsetof(DVErrorMarkerContext, x)
98 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
99 static const AVOption options[] = {
100 { "color" , "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "yellow"}, 0, 0, FLAGS },
101 { "sta" , "specify which error status value to match"
102 , OFFSET(sta ), AV_OPT_TYPE_FLAGS, {.i64 = 0xFFFE}, 0, 0xFFFF, FLAGS, "sta" },
103 { "ok" , "No error, no concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0001}, 0, 0xFFFF, FLAGS, "sta"},
104 { "Aa" , "No error, concealment from previous frame type a",0, AV_OPT_TYPE_CONST, {.i64 = 0x0004}, 0, 0xFFFF, FLAGS, "sta"},
105 { "Ba" , "No error, concealment from next frame type a", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0010}, 0, 0xFFFF, FLAGS, "sta"},
106 { "Ca" , "No error, unspecified concealment type a", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0040}, 0, 0xFFFF, FLAGS, "sta"},
107 { "erri" , "Error with inserted code, No concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0080}, 0, 0xFFFF, FLAGS, "sta"},
108 { "erru" , "Error with unidentified pos, No concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x8000}, 0, 0xFFFF, FLAGS, "sta"},
109 { "err" , "Error, No concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x8080}, 0, 0xFFFF, FLAGS, "sta"},
110 { "Ab" , "No error, concealment from previous frame type b",0, AV_OPT_TYPE_CONST, {.i64 = 0x0400}, 0, 0xFFFF, FLAGS, "sta"},
111 { "Bb" , "No error, concealment from next frame type b", 0, AV_OPT_TYPE_CONST, {.i64 = 0x1000}, 0, 0xFFFF, FLAGS, "sta"},
112 { "Cb" , "No error, unspecified concealment type b", 0, AV_OPT_TYPE_CONST, {.i64 = 0x4000}, 0, 0xFFFF, FLAGS, "sta"},
113 { "A" , "No error, concealment from previous frame", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0404}, 0, 0xFFFF, FLAGS, "sta"},
114 { "B" , "No error, concealment from next frame", 0, AV_OPT_TYPE_CONST, {.i64 = 0x1010}, 0, 0xFFFF, FLAGS, "sta"},
115 { "C" , "No error, unspecified concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0x4040}, 0, 0xFFFF, FLAGS, "sta"},
116 { "a" , "No error, concealment type a", 0, AV_OPT_TYPE_CONST, {.i64 = 0x0054}, 0, 0xFFFF, FLAGS, "sta"},
117 { "b" , "No error, concealment type b", 0, AV_OPT_TYPE_CONST, {.i64 = 0x5400}, 0, 0xFFFF, FLAGS, "sta"},
118 { "res" , "Reserved", 0, AV_OPT_TYPE_CONST, {.i64 = 0x2B2A}, 0, 0xFFFF, FLAGS, "sta"},
119 { "notok" , "Error or concealment", 0, AV_OPT_TYPE_CONST, {.i64 = 0xD4D4}, 0, 0xFFFF, FLAGS, "sta"},
120 { "notres" , "Not reserved", 0, AV_OPT_TYPE_CONST, {.i64 = 0xD4D5}, 0, 0xFFFF, FLAGS, "sta"},
121 { NULL },
122 };
123
124 static const AVClass dv_error_marker_class = {
125 .class_name = "dv_error_marker",
126 .item_name = av_default_item_name,
127 .option = options,
128 .version = LIBAVUTIL_VERSION_INT,
129 };
130
131 const FFBitStreamFilter ff_dv_error_marker_bsf = {
132 .p.name = "dv_error_marker",
133 .p.codec_ids = (const enum AVCodecID []){ AV_CODEC_ID_DVVIDEO, AV_CODEC_ID_NONE },
134 .p.priv_class = &dv_error_marker_class,
135 .priv_data_size = sizeof(DVErrorMarkerContext),
136 .init = dv_error_marker_init,
137 .filter = dv_error_marker_filter,
138 };
139