FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/vbnenc.c
Date: 2025-11-04 10:33:36
Exec Total Coverage
Lines: 57 68 83.8%
Functions: 2 2 100.0%
Branches: 22 30 73.3%
Line Branch Exec Source
1 /*
2 * Vizrt Binary Image encoder
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 /**
22 * @file
23 * Vizrt Binary Image encoder
24 */
25
26 #include "avcodec.h"
27 #include "bytestream.h"
28 #include "codec_internal.h"
29 #include "encode.h"
30 #include "texturedsp.h"
31 #include "vbn.h"
32
33 #include "libavutil/imgutils.h"
34 #include "libavutil/frame.h"
35 #include "libavutil/opt.h"
36
37 typedef struct VBNContext {
38 AVClass *class;
39 TextureDSPEncContext dxtc;
40 int format;
41 TextureDSPThreadContext enc;
42 } VBNContext;
43
44 4 static int vbn_encode(AVCodecContext *avctx, AVPacket *pkt,
45 const AVFrame *frame, int *got_packet)
46 {
47 4 VBNContext *ctx = avctx->priv_data;
48 4 PutByteContext pb0, *const pb = &pb0;
49 int ret;
50 ptrdiff_t linesize;
51 int64_t pkt_size;
52
53 4 ret = av_image_check_size2(frame->width, frame->height, INT_MAX, frame->format, 0, avctx);
54
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 4 times.
 4 if (ret < 0)
55 ✗ return ret;
56
57
4/4
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 1 times.
✓ Branch 2 taken 1 times.
✓ Branch 3 taken 2 times.
 4 if (ctx->format == VBN_FORMAT_DXT1 || ctx->format == VBN_FORMAT_DXT5) {
58
2/4
✓ Branch 0 taken 2 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 2 times.
 2 if (frame->width % TEXTURE_BLOCK_W || frame->height % TEXTURE_BLOCK_H) {
59 ✗ av_log(avctx, AV_LOG_ERROR, "Video size %dx%d is not multiple of 4\n", frame->width, frame->height);
60 ✗ return AVERROR(EINVAL);
61 }
62
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2 times.
 2 if (frame->format != AV_PIX_FMT_RGBA) {
63 ✗ av_log(avctx, AV_LOG_ERROR, "DXT formats only support RGBA pixel format\n");
64 ✗ return AVERROR(EINVAL);
65 }
66 2 ctx->enc.raw_ratio = 16;
67 2 ctx->enc.slice_count = av_clip(avctx->thread_count, 1, avctx->height / TEXTURE_BLOCK_H);
68 }
69
70
3/4
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 1 times.
✓ Branch 2 taken 2 times.
✗ Branch 3 not taken.
 4 switch (ctx->format) {
71 1 case VBN_FORMAT_DXT1:
72 1 linesize = frame->width / 2;
73 1 ctx->enc.tex_funct = ctx->dxtc.dxt1_block;
74 1 ctx->enc.tex_ratio = 8;
75 1 break;
76 1 case VBN_FORMAT_DXT5:
77 1 linesize = frame->width;
78 1 ctx->enc.tex_funct = ctx->dxtc.dxt5_block;
79 1 ctx->enc.tex_ratio = 16;
80 1 break;
81 2 case VBN_FORMAT_RAW:
82 2 linesize = av_image_get_linesize(frame->format, frame->width, 0);
83
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2 times.
 2 if (linesize < 0)
84 ✗ return linesize;
85 2 break;
86 ✗ default:
87 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid format %02X\n", ctx->format);
88 ✗ return AVERROR(EINVAL);
89 }
90
91 4 pkt_size = VBN_HEADER_SIZE + linesize * frame->height;
92
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 4 times.
 4 if (pkt_size > INT_MAX)
93 ✗ return AVERROR(EINVAL);
94
95
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 4 times.
 4 if ((ret = ff_get_encode_buffer(avctx, pkt, pkt_size, 0)) < 0)
96 ✗ return ret;
97
98 4 memset(pkt->data, 0, VBN_HEADER_SIZE);
99 4 bytestream2_init_writer(pb, pkt->data, pkt_size);
100 4 bytestream2_put_le32u(pb, VBN_MAGIC);
101 4 bytestream2_put_le32u(pb, VBN_MAJOR);
102 4 bytestream2_put_le32u(pb, VBN_MINOR);
103 4 bytestream2_put_le32u(pb, frame->width);
104 4 bytestream2_put_le32u(pb, frame->height);
105
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 1 times.
 4 bytestream2_put_le32u(pb, frame->format == AV_PIX_FMT_RGBA ? 4 : 3);
106 4 bytestream2_put_le32u(pb, ctx->format);
107
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 1 times.
 4 bytestream2_put_le32u(pb, frame->format == AV_PIX_FMT_RGBA ? VBN_PIX_RGBA : VBN_PIX_RGB);
108 4 bytestream2_put_le32u(pb, 0); // mipmaps
109 4 bytestream2_put_le32u(pb, pkt_size - VBN_HEADER_SIZE);
110 4 bytestream2_seek_p(pb, 64, SEEK_SET);
111 4 bytestream2_put_le32u(pb, pkt_size - VBN_HEADER_SIZE);
112
113
4/4
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 1 times.
✓ Branch 2 taken 1 times.
✓ Branch 3 taken 2 times.
 4 if (ctx->format == VBN_FORMAT_DXT1 || ctx->format == VBN_FORMAT_DXT5) {
114 2 ctx->enc.frame_data.in = (frame->height - 1) * frame->linesize[0] + frame->data[0];
115 2 ctx->enc.stride = -frame->linesize[0];
116 2 ctx->enc.tex_data.out = pkt->data + VBN_HEADER_SIZE;
117 2 ctx->enc.width = avctx->width;
118 2 ctx->enc.height = avctx->height;
119 2 ff_texturedsp_exec_compress_threads(avctx, &ctx->enc);
120 } else {
121 2 const uint8_t *flipped = frame->data[0] + frame->linesize[0] * (frame->height - 1);
122 2 av_image_copy_plane(pkt->data + VBN_HEADER_SIZE, linesize, flipped, -frame->linesize[0], linesize, frame->height);
123 }
124
125 4 *got_packet = 1;
126 4 return 0;
127 }
128
129 4 static av_cold int vbn_init(AVCodecContext *avctx)
130 {
131 4 VBNContext *ctx = avctx->priv_data;
132 4 ff_texturedspenc_init(&ctx->dxtc);
133 4 return 0;
134 }
135
136 #define OFFSET(x) offsetof(VBNContext, x)
137 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
138 static const AVOption options[] = {
139 { "format", "Texture format", OFFSET(format), AV_OPT_TYPE_INT, { .i64 = VBN_FORMAT_DXT5 }, VBN_FORMAT_RAW, VBN_FORMAT_DXT5, FLAGS, .unit = "format" },
140 { "raw", "RAW texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_RAW }, 0, 0, FLAGS, .unit = "format" },
141 { "dxt1", "DXT1 texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_DXT1 }, 0, 0, FLAGS, .unit = "format" },
142 { "dxt5", "DXT5 texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_DXT5 }, 0, 0, FLAGS, .unit = "format" },
143 { NULL },
144 };
145
146 static const AVClass vbnenc_class = {
147 .class_name = "VBN encoder",
148 .item_name = av_default_item_name,
149 .option = options,
150 .version = LIBAVUTIL_VERSION_INT,
151 };
152
153 const FFCodec ff_vbn_encoder = {
154 .p.name = "vbn",
155 CODEC_LONG_NAME("Vizrt Binary Image"),
156 .p.type = AVMEDIA_TYPE_VIDEO,
157 .p.id = AV_CODEC_ID_VBN,
158 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS |
159 AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
160 .p.priv_class = &vbnenc_class,
161 .init = vbn_init,
162 FF_CODEC_ENCODE_CB(vbn_encode),
163 .priv_data_size = sizeof(VBNContext),
164 CODEC_PIXFMTS(AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB24),
165 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
166 };
167