Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/ptx.c |
Date: | 2022-07-07 01:21:54 |
Exec | Total | Coverage | |
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Lines: | 26 | 36 | 72.2% |
Branches: | 11 | 20 | 55.0% |
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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 |