FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/aasc.c
Date: 2022-07-04 19:11:22
Exec Total Coverage
Lines: 35 74 47.3%
Branches: 8 26 30.8%
Line Branch Exec Source
1 /*
2 * Autodesk RLE Decoder
3 * Copyright (C) 2005 The FFmpeg project
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 * Autodesk RLE Video Decoder by Konstantin Shishkov
25 */
26
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30
31 #include "avcodec.h"
32 #include "codec_internal.h"
33 #include "internal.h"
34 #include "msrledec.h"
35
36 typedef struct AascContext {
37 AVCodecContext *avctx;
38 GetByteContext gb;
39 AVFrame *frame;
40
41 uint32_t palette[AVPALETTE_COUNT];
42 int palette_size;
43 } AascContext;
44
45 2 static av_cold int aasc_decode_init(AVCodecContext *avctx)
46 {
47 2 AascContext *s = avctx->priv_data;
48 uint8_t *ptr;
49 int i;
50
51 2 s->avctx = avctx;
52
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 2 switch (avctx->bits_per_coded_sample) {
53 ✗ case 8:
54 ✗ avctx->pix_fmt = AV_PIX_FMT_PAL8;
55
56 ✗ ptr = avctx->extradata;
57 ✗ s->palette_size = FFMIN(avctx->extradata_size, AVPALETTE_SIZE);
58 ✗ for (i = 0; i < s->palette_size / 4; i++) {
59 ✗ s->palette[i] = 0xFFU << 24 | AV_RL32(ptr);
60 ✗ ptr += 4;
61 }
62 ✗ break;
63 ✗ case 16:
64 ✗ avctx->pix_fmt = AV_PIX_FMT_RGB555LE;
65 ✗ break;
66 2 case 24:
67 2 avctx->pix_fmt = AV_PIX_FMT_BGR24;
68 2 break;
69 ✗ default:
70 ✗ av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", avctx->bits_per_coded_sample);
71 ✗ return -1;
72 }
73
74 2 s->frame = av_frame_alloc();
75
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 2 if (!s->frame)
76 ✗ return AVERROR(ENOMEM);
77
78 2 return 0;
79 }
80
81 24 static int aasc_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
82 int *got_frame, AVPacket *avpkt)
83 {
84 24 const uint8_t *buf = avpkt->data;
85 24 int buf_size = avpkt->size;
86 24 AascContext *s = avctx->priv_data;
87 int compr, i, stride, psize, ret;
88
89
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 24 if (buf_size < 4) {
90 ✗ av_log(avctx, AV_LOG_ERROR, "frame too short\n");
91 ✗ return AVERROR_INVALIDDATA;
92 }
93
94
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 24 if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
95 ✗ return ret;
96
97 24 compr = AV_RL32(buf);
98 24 buf += 4;
99 24 buf_size -= 4;
100 24 psize = avctx->bits_per_coded_sample / 8;
101
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 24 switch (avctx->codec_tag) {
102 ✗ case MKTAG('A', 'A', 'S', '4'):
103 ✗ bytestream2_init(&s->gb, buf - 4, buf_size + 4);
104 ✗ ff_msrle_decode(avctx, s->frame, 8, &s->gb);
105 ✗ break;
106
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 24 case MKTAG('A', 'A', 'S', 'C'):
107 switch (compr) {
108 ✗ case 0:
109 ✗ stride = (avctx->width * psize + psize) & ~psize;
110 ✗ if (buf_size < stride * avctx->height)
111 ✗ return AVERROR_INVALIDDATA;
112 ✗ for (i = avctx->height - 1; i >= 0; i--) {
113 ✗ memcpy(s->frame->data[0] + i * s->frame->linesize[0], buf, avctx->width * psize);
114 ✗ buf += stride;
115 ✗ buf_size -= stride;
116 }
117 ✗ break;
118 24 case 1:
119 24 bytestream2_init(&s->gb, buf, buf_size);
120 24 ff_msrle_decode(avctx, s->frame, 8, &s->gb);
121 24 break;
122 ✗ default:
123 ✗ av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
124 ✗ return AVERROR_INVALIDDATA;
125 }
126 24 break;
127 ✗ default:
128 ✗ av_log(avctx, AV_LOG_ERROR, "Unknown FourCC: %X\n", avctx->codec_tag);
129 ✗ return -1;
130 }
131
132
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 24 if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
133 ✗ memcpy(s->frame->data[1], s->palette, s->palette_size);
134
135 24 *got_frame = 1;
136
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 24 if ((ret = av_frame_ref(rframe, s->frame)) < 0)
137 ✗ return ret;
138
139 /* report that the buffer was completely consumed */
140 24 return avpkt->size;
141 }
142
143 2 static av_cold int aasc_decode_end(AVCodecContext *avctx)
144 {
145 2 AascContext *s = avctx->priv_data;
146
147 2 av_frame_free(&s->frame);
148
149 2 return 0;
150 }
151
152 const FFCodec ff_aasc_decoder = {
153 .p.name = "aasc",
154 .p.long_name = NULL_IF_CONFIG_SMALL("Autodesk RLE"),
155 .p.type = AVMEDIA_TYPE_VIDEO,
156 .p.id = AV_CODEC_ID_AASC,
157 .priv_data_size = sizeof(AascContext),
158 .init = aasc_decode_init,
159 .close = aasc_decode_end,
160 FF_CODEC_DECODE_CB(aasc_decode_frame),
161 .p.capabilities = AV_CODEC_CAP_DR1,
162 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
163 };
164