Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/vbndec.c |
Date: | 2022-05-23 03:24:52 |
Exec | Total | Coverage | |
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Lines: | 68 | 90 | 75.6% |
Branches: | 31 | 50 | 62.0% |
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1 | /* | ||
2 | * Vizrt Binary Image decoder | ||
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 decoder | ||
24 | */ | ||
25 | |||
26 | #include "avcodec.h" | ||
27 | #include "bytestream.h" | ||
28 | #include "codec_internal.h" | ||
29 | #include "internal.h" | ||
30 | #include "texturedsp.h" | ||
31 | #include "vbn.h" | ||
32 | #include "libavutil/imgutils.h" | ||
33 | |||
34 | typedef struct VBNContext { | ||
35 | TextureDSPContext texdsp; | ||
36 | TextureDSPThreadContext dec; | ||
37 | } VBNContext; | ||
38 | |||
39 | 8 | static av_cold int vbn_init(AVCodecContext *avctx) | |
40 | { | ||
41 | 8 | VBNContext *ctx = avctx->priv_data; | |
42 | 8 | ff_texturedsp_init(&ctx->texdsp); | |
43 | 8 | return 0; | |
44 | } | ||
45 | |||
46 | 8 | static int decompress(AVCodecContext *avctx, GetByteContext *gb, | |
47 | int compression, uint8_t **outbuf) | ||
48 | { | ||
49 |
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8 | if (compression == VBN_COMPRESSION_NONE) // outbuf is left NULL because gb->buf can be used directly |
50 | 8 | return bytestream2_get_bytes_left(gb); | |
51 | |||
52 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unsupported VBN compression: 0x%08x\n", compression); | |
53 | ✗ | return AVERROR_PATCHWELCOME; | |
54 | } | ||
55 | |||
56 | 8 | static int vbn_decode_frame(AVCodecContext *avctx, | |
57 | AVFrame *frame, int *got_frame, | ||
58 | AVPacket *avpkt) | ||
59 | { | ||
60 | 8 | VBNContext *ctx = avctx->priv_data; | |
61 | 8 | GetByteContext gb0, *const gb = &gb0; | |
62 | 8 | uint8_t *image_buf = NULL; | |
63 | int image_len; | ||
64 | int width, height, components, format, compression, pix_fmt, linesize, data_size; | ||
65 | int ret; | ||
66 | |||
67 | 8 | bytestream2_init(gb, avpkt->data, avpkt->size); | |
68 | |||
69 |
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8 | if (bytestream2_get_bytes_left(gb) < VBN_HEADER_SIZE) { |
70 | ✗ | av_log(avctx, AV_LOG_ERROR, "VBN header truncated\n"); | |
71 | ✗ | return AVERROR_INVALIDDATA; | |
72 | } | ||
73 | |||
74 |
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16 | if (bytestream2_get_le32u(gb) != VBN_MAGIC || |
75 |
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16 | bytestream2_get_le32u(gb) != VBN_MAJOR || |
76 | 8 | bytestream2_get_le32u(gb) != VBN_MINOR) { | |
77 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid VBN header\n"); | |
78 | ✗ | return AVERROR_INVALIDDATA; | |
79 | } | ||
80 | |||
81 | 8 | width = bytestream2_get_le32u(gb); | |
82 | 8 | height = bytestream2_get_le32u(gb); | |
83 | 8 | components = bytestream2_get_le32u(gb); | |
84 | 8 | format = bytestream2_get_le32u(gb); | |
85 | 8 | pix_fmt = bytestream2_get_le32u(gb); | |
86 | 8 | bytestream2_get_le32u(gb); // mipmaps | |
87 | 8 | data_size = bytestream2_get_le32u(gb); | |
88 | 8 | bytestream2_seek(gb, VBN_HEADER_SIZE, SEEK_SET); | |
89 | |||
90 | 8 | compression = format & 0xffffff00; | |
91 | 8 | format = format & 0xff; | |
92 | |||
93 |
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8 | if (data_size != bytestream2_get_bytes_left(gb)) { |
94 | ✗ | av_log(avctx, AV_LOG_ERROR, "Truncated packet\n"); | |
95 | ✗ | return AVERROR_INVALIDDATA; | |
96 | } | ||
97 | |||
98 |
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8 | if (pix_fmt != VBN_PIX_RGBA && pix_fmt != VBN_PIX_RGB) { |
99 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format: 0x%08x\n", pix_fmt); | |
100 | ✗ | return AVERROR_PATCHWELCOME; | |
101 | } | ||
102 | |||
103 | 8 | ret = ff_set_dimensions(avctx, width, height); | |
104 |
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8 | if (ret < 0) |
105 | ✗ | return ret; | |
106 | |||
107 |
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8 | if (format == VBN_FORMAT_RAW) { |
108 |
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4 | if (pix_fmt == VBN_PIX_RGB && components == 3) { |
109 | 2 | avctx->pix_fmt = AV_PIX_FMT_RGB24; | |
110 | 2 | linesize = avctx->width * 3; | |
111 |
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2 | } else if (pix_fmt == VBN_PIX_RGBA && components == 4) { |
112 | 2 | avctx->pix_fmt = AV_PIX_FMT_RGBA; | |
113 | 2 | linesize = avctx->width * 4; | |
114 | } else { | ||
115 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unsupported number of components: %d\n", components); | |
116 | ✗ | return AVERROR_PATCHWELCOME; | |
117 | } | ||
118 |
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4 | } else if (format == VBN_FORMAT_DXT1 || format == VBN_FORMAT_DXT5) { |
119 |
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4 | if (avctx->width % TEXTURE_BLOCK_W || avctx->height % TEXTURE_BLOCK_H) { |
120 | ✗ | av_log(avctx, AV_LOG_ERROR, "DXTx compression only supports 4 pixel aligned resolutions\n"); | |
121 | ✗ | return AVERROR_INVALIDDATA; | |
122 | } | ||
123 | |||
124 | 4 | avctx->pix_fmt = AV_PIX_FMT_RGBA; | |
125 |
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4 | if (format == VBN_FORMAT_DXT1) { |
126 | 2 | ctx->dec.tex_funct = ctx->texdsp.dxt1_block; | |
127 | 2 | ctx->dec.tex_ratio = 8; | |
128 | 2 | linesize = avctx->coded_width / 2; | |
129 | } else { | ||
130 | 2 | ctx->dec.tex_funct = ctx->texdsp.dxt5_block; | |
131 | 2 | ctx->dec.tex_ratio = 16; | |
132 | 2 | linesize = avctx->coded_width; | |
133 | } | ||
134 | } else { | ||
135 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unsupported VBN format: 0x%02x\n", format); | |
136 | ✗ | return AVERROR_PATCHWELCOME; | |
137 | } | ||
138 | |||
139 | 8 | image_len = decompress(avctx, gb, compression, &image_buf); | |
140 |
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8 | if (image_len < 0) |
141 | ✗ | return image_len; | |
142 | |||
143 |
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8 | if (image_len < linesize * avctx->coded_height) { |
144 | ✗ | av_log(avctx, AV_LOG_ERROR, "Insufficent data\n"); | |
145 | ✗ | ret = AVERROR_INVALIDDATA; | |
146 | ✗ | goto out; | |
147 | } | ||
148 | |||
149 | 8 | ret = ff_get_buffer(avctx, frame, 0); | |
150 |
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8 | if (ret < 0) |
151 | ✗ | goto out; | |
152 | |||
153 | 8 | frame->pict_type = AV_PICTURE_TYPE_I; | |
154 | 8 | frame->key_frame = 1; | |
155 | |||
156 |
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8 | if (format == VBN_FORMAT_RAW) { |
157 | 4 | uint8_t *flipped = frame->data[0] + frame->linesize[0] * (frame->height - 1); | |
158 |
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4 | av_image_copy_plane(flipped, -frame->linesize[0], image_buf ? image_buf : gb->buffer, linesize, linesize, frame->height); |
159 | } else { | ||
160 | 4 | ctx->dec.slice_count = av_clip(avctx->thread_count, 1, avctx->coded_height / TEXTURE_BLOCK_H); | |
161 |
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4 | ctx->dec.tex_data.in = image_buf ? image_buf : gb->buffer; |
162 | 4 | ctx->dec.raw_ratio = 16; | |
163 | 4 | ctx->dec.frame_data.out = frame->data[0] + frame->linesize[0] * (frame->height - 1); | |
164 | 4 | ctx->dec.stride = -frame->linesize[0]; | |
165 | 4 | avctx->execute2(avctx, ff_texturedsp_decompress_thread, &ctx->dec, NULL, ctx->dec.slice_count); | |
166 | } | ||
167 | |||
168 | 8 | *got_frame = 1; | |
169 | 8 | ret = avpkt->size; | |
170 | |||
171 | 8 | out: | |
172 | 8 | av_freep(&image_buf); | |
173 | 8 | return ret; | |
174 | } | ||
175 | |||
176 | const FFCodec ff_vbn_decoder = { | ||
177 | .p.name = "vbn", | ||
178 | .p.long_name = NULL_IF_CONFIG_SMALL("Vizrt Binary Image"), | ||
179 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
180 | .p.id = AV_CODEC_ID_VBN, | ||
181 | .init = vbn_init, | ||
182 | FF_CODEC_DECODE_CB(vbn_decode_frame), | ||
183 | .priv_data_size = sizeof(VBNContext), | ||
184 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS, | ||
185 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | ||
186 | }; | ||
187 |