FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/ptx.c
Date: 2022-07-07 01:21:54
Exec Total Coverage
Lines: 26 36 72.2%
Branches: 11 20 55.0%
Line Branch Exec Source
1 /*
2 * V.Flash PTX (.ptx) image decoder
3 * Copyright (c) 2007 Ivo van Poorten
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 #include "libavutil/common.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/imgutils.h"
25 #include "avcodec.h"
26 #include "codec_internal.h"
27 #include "internal.h"
28
29 2 static int ptx_decode_frame(AVCodecContext *avctx, AVFrame *p,
30 int *got_frame, AVPacket *avpkt)
31 {
32 2 const uint8_t *buf = avpkt->data;
33 2 const uint8_t *buf_end = avpkt->data + avpkt->size;
34 unsigned int offset, w, h, y, stride, bytes_per_pixel;
35 int ret;
36 uint8_t *ptr;
37
38
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 2 if (buf_end - buf < 14)
39 ✗ return AVERROR_INVALIDDATA;
40 2 offset = AV_RL16(buf);
41 2 w = AV_RL16(buf+8);
42 2 h = AV_RL16(buf+10);
43 2 bytes_per_pixel = AV_RL16(buf+12) >> 3;
44
45
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 2 if (bytes_per_pixel != 2) {
46 ✗ avpriv_request_sample(avctx, "Image format not RGB15");
47 ✗ return AVERROR_PATCHWELCOME;
48 }
49
50 2 avctx->pix_fmt = AV_PIX_FMT_BGR555LE;
51
52
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 2 if (buf_end - buf < offset)
53 ✗ return AVERROR_INVALIDDATA;
54
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 2 if (offset != 0x2c)
55 ✗ avpriv_request_sample(avctx, "offset != 0x2c");
56
57 2 buf += offset;
58
59
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 2 if (buf_end - buf < w * bytes_per_pixel)
60 ✗ return AVERROR_INVALIDDATA;
61
62
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 2 if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
63 ✗ return ret;
64
65
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 2 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
66 ✗ return ret;
67
68 2 p->pict_type = AV_PICTURE_TYPE_I;
69
70 2 ptr = p->data[0];
71 2 stride = p->linesize[0];
72
73
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 258 for (y = 0; y < h && buf_end - buf >= w * bytes_per_pixel; y++) {
74 256 memcpy(ptr, buf, w*bytes_per_pixel);
75 256 ptr += stride;
76 256 buf += w*bytes_per_pixel;
77 }
78
79 2 *got_frame = 1;
80
81
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 2 if (y < h) {
82 ✗ av_log(avctx, AV_LOG_WARNING, "incomplete packet\n");
83 ✗ return avpkt->size;
84 }
85
86 2 return offset + w*h*bytes_per_pixel;
87 }
88
89 const FFCodec ff_ptx_decoder = {
90 .p.name = "ptx",
91 .p.long_name = NULL_IF_CONFIG_SMALL("V.Flash PTX image"),
92 .p.type = AVMEDIA_TYPE_VIDEO,
93 .p.id = AV_CODEC_ID_PTX,
94 .p.capabilities = AV_CODEC_CAP_DR1,
95 FF_CODEC_DECODE_CB(ptx_decode_frame),
96 };
97