FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/rv34_parser.c
Date: 2021-09-26 18:22:30
Exec Total Coverage
Lines: 22 22 100.0%
Branches: 10 10 100.0%

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1 /*
2 * RV30/40 parser
3 * Copyright (c) 2011 Konstantin Shishkov
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 * RV30/40 parser
25 */
26
27 #include "parser.h"
28 #include "libavutil/intreadwrite.h"
29
30 typedef struct RV34ParseContext {
31 ParseContext pc;
32 int64_t key_dts;
33 int key_pts;
34 } RV34ParseContext;
35
36 static const int rv_to_av_frame_type[4] = {
37 AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B,
38 };
39
40 550 static int rv34_parse(AVCodecParserContext *s,
41 AVCodecContext *avctx,
42 const uint8_t **poutbuf, int *poutbuf_size,
43 const uint8_t *buf, int buf_size)
44 {
45 550 RV34ParseContext *pc = s->priv_data;
46 int type, pts, hdr;
47
48
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550 if (buf_size < 13 + *buf * 8) {
49 3 *poutbuf = buf;
50 3 *poutbuf_size = buf_size;
51 3 return buf_size;
52 }
53
54 547 hdr = AV_RB32(buf + 9 + *buf * 8);
55
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547 if (avctx->codec_id == AV_CODEC_ID_RV30) {
56 244 type = (hdr >> 27) & 3;
57 244 pts = (hdr >> 7) & 0x1FFF;
58 } else {
59 303 type = (hdr >> 29) & 3;
60 303 pts = (hdr >> 6) & 0x1FFF;
61 }
62
63
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547 if (type != 3 && s->pts != AV_NOPTS_VALUE) {
64 158 pc->key_dts = s->pts;
65 158 pc->key_pts = pts;
66 } else {
67
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389 if (type != 3)
68 2 s->pts = pc->key_dts + ((pts - pc->key_pts) & 0x1FFF);
69 else
70 387 s->pts = pc->key_dts - ((pc->key_pts - pts) & 0x1FFF);
71 }
72 547 s->pict_type = rv_to_av_frame_type[type];
73
74 547 *poutbuf = buf;
75 547 *poutbuf_size = buf_size;
76 547 return buf_size;
77 }
78
79 #if CONFIG_RV30_PARSER
80 const AVCodecParser ff_rv30_parser = {
81 .codec_ids = { AV_CODEC_ID_RV30 },
82 .priv_data_size = sizeof(RV34ParseContext),
83 .parser_parse = rv34_parse,
84 };
85 #endif
86
87 #if CONFIG_RV40_PARSER
88 const AVCodecParser ff_rv40_parser = {
89 .codec_ids = { AV_CODEC_ID_RV40 },
90 .priv_data_size = sizeof(RV34ParseContext),
91 .parser_parse = rv34_parse,
92 };
93 #endif
94