FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/ptx.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 27 37 73.0%
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 "internal.h"
27
28 2 static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
29 AVPacket *avpkt) {
30 2 const uint8_t *buf = avpkt->data;
31 2 const uint8_t *buf_end = avpkt->data + avpkt->size;
32 2 AVFrame * const p = data;
33 unsigned int offset, w, h, y, stride, bytes_per_pixel;
34 int ret;
35 uint8_t *ptr;
36
37
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2 if (buf_end - buf < 14)
38 return AVERROR_INVALIDDATA;
39 2 offset = AV_RL16(buf);
40 2 w = AV_RL16(buf+8);
41 2 h = AV_RL16(buf+10);
42 2 bytes_per_pixel = AV_RL16(buf+12) >> 3;
43
44
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2 if (bytes_per_pixel != 2) {
45 avpriv_request_sample(avctx, "Image format not RGB15");
46 return AVERROR_PATCHWELCOME;
47 }
48
49 2 avctx->pix_fmt = AV_PIX_FMT_BGR555LE;
50
51
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2 if (buf_end - buf < offset)
52 return AVERROR_INVALIDDATA;
53
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2 if (offset != 0x2c)
54 avpriv_request_sample(avctx, "offset != 0x2c");
55
56 2 buf += offset;
57
58
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2 if (buf_end - buf < w * bytes_per_pixel)
59 return AVERROR_INVALIDDATA;
60
61
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2 if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
62 return ret;
63
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2 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
65 return ret;
66
67 2 p->pict_type = AV_PICTURE_TYPE_I;
68
69 2 ptr = p->data[0];
70 2 stride = p->linesize[0];
71
72
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258 for (y = 0; y < h && buf_end - buf >= w * bytes_per_pixel; y++) {
73 256 memcpy(ptr, buf, w*bytes_per_pixel);
74 256 ptr += stride;
75 256 buf += w*bytes_per_pixel;
76 }
77
78 2 *got_frame = 1;
79
80
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2 if (y < h) {
81 av_log(avctx, AV_LOG_WARNING, "incomplete packet\n");
82 return avpkt->size;
83 }
84
85 2 return offset + w*h*bytes_per_pixel;
86 }
87
88 const AVCodec ff_ptx_decoder = {
89 .name = "ptx",
90 .long_name = NULL_IF_CONFIG_SMALL("V.Flash PTX image"),
91 .type = AVMEDIA_TYPE_VIDEO,
92 .id = AV_CODEC_ID_PTX,
93 .decode = ptx_decode_frame,
94 .capabilities = AV_CODEC_CAP_DR1,
95 };
96