FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/aasc.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 36 75 48.0%
Functions: 3 3 100.0%
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 <string.h>
28
29 #include "avcodec.h"
30 #include "codec_internal.h"
31 #include "decode.h"
32 #include "msrledec.h"
33
34 typedef struct AascContext {
35 AVCodecContext *avctx;
36 GetByteContext gb;
37 AVFrame *frame;
38
39 uint32_t palette[AVPALETTE_COUNT];
40 int palette_size;
41 } AascContext;
42
43 2 static av_cold int aasc_decode_init(AVCodecContext *avctx)
44 {
45 2 AascContext *s = avctx->priv_data;
46 uint8_t *ptr;
47 int i;
48
49 2 s->avctx = avctx;
50
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 2 switch (avctx->bits_per_coded_sample) {
51 ✗ case 8:
52 ✗ avctx->pix_fmt = AV_PIX_FMT_PAL8;
53
54 ✗ ptr = avctx->extradata;
55 ✗ s->palette_size = FFMIN(avctx->extradata_size, AVPALETTE_SIZE);
56 ✗ for (i = 0; i < s->palette_size / 4; i++) {
57 ✗ s->palette[i] = 0xFFU << 24 | AV_RL32(ptr);
58 ✗ ptr += 4;
59 }
60 ✗ break;
61 ✗ case 16:
62 ✗ avctx->pix_fmt = AV_PIX_FMT_RGB555LE;
63 ✗ break;
64 2 case 24:
65 2 avctx->pix_fmt = AV_PIX_FMT_BGR24;
66 2 break;
67 ✗ default:
68 ✗ av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", avctx->bits_per_coded_sample);
69 ✗ return -1;
70 }
71
72 2 s->frame = av_frame_alloc();
73
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 2 if (!s->frame)
74 ✗ return AVERROR(ENOMEM);
75
76 2 return 0;
77 }
78
79 24 static int aasc_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
80 int *got_frame, AVPacket *avpkt)
81 {
82 24 const uint8_t *buf = avpkt->data;
83 24 int buf_size = avpkt->size;
84 24 AascContext *s = avctx->priv_data;
85 int compr, i, stride, psize, ret;
86
87
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 24 if (buf_size < 4) {
88 ✗ av_log(avctx, AV_LOG_ERROR, "frame too short\n");
89 ✗ return AVERROR_INVALIDDATA;
90 }
91
92
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 24 if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
93 ✗ return ret;
94
95 24 compr = AV_RL32(buf);
96 24 buf += 4;
97 24 buf_size -= 4;
98 24 psize = avctx->bits_per_coded_sample / 8;
99
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 24 switch (avctx->codec_tag) {
100 ✗ case MKTAG('A', 'A', 'S', '4'):
101 ✗ bytestream2_init(&s->gb, buf - 4, buf_size + 4);
102 ✗ ff_msrle_decode(avctx, s->frame, 8, &s->gb);
103 ✗ break;
104 24 case MKTAG('A', 'A', 'S', 'C'):
105
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 24 switch (compr) {
106 ✗ case 0:
107 ✗ stride = (avctx->width * psize + psize) & ~psize;
108 ✗ if (buf_size < stride * avctx->height)
109 ✗ return AVERROR_INVALIDDATA;
110 ✗ for (i = avctx->height - 1; i >= 0; i--) {
111 ✗ memcpy(s->frame->data[0] + i * s->frame->linesize[0], buf, avctx->width * psize);
112 ✗ buf += stride;
113 ✗ buf_size -= stride;
114 }
115 ✗ break;
116 24 case 1:
117 24 bytestream2_init(&s->gb, buf, buf_size);
118 24 ff_msrle_decode(avctx, s->frame, 8, &s->gb);
119 24 break;
120 ✗ default:
121 ✗ av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
122 ✗ return AVERROR_INVALIDDATA;
123 }
124 24 break;
125 ✗ default:
126 ✗ av_log(avctx, AV_LOG_ERROR, "Unknown FourCC: %X\n", avctx->codec_tag);
127 ✗ return -1;
128 }
129
130
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 24 if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
131 ✗ memcpy(s->frame->data[1], s->palette, s->palette_size);
132
133 24 *got_frame = 1;
134
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 24 if ((ret = av_frame_ref(rframe, s->frame)) < 0)
135 ✗ return ret;
136
137 /* report that the buffer was completely consumed */
138 24 return avpkt->size;
139 }
140
141 2 static av_cold int aasc_decode_end(AVCodecContext *avctx)
142 {
143 2 AascContext *s = avctx->priv_data;
144
145 2 av_frame_free(&s->frame);
146
147 2 return 0;
148 }
149
150 const FFCodec ff_aasc_decoder = {
151 .p.name = "aasc",
152 CODEC_LONG_NAME("Autodesk RLE"),
153 .p.type = AVMEDIA_TYPE_VIDEO,
154 .p.id = AV_CODEC_ID_AASC,
155 .priv_data_size = sizeof(AascContext),
156 .init = aasc_decode_init,
157 .close = aasc_decode_end,
158 FF_CODEC_DECODE_CB(aasc_decode_frame),
159 .p.capabilities = AV_CODEC_CAP_DR1,
160 };
161