FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/rv34_parser.c
Date: 2022-07-04 19:11:22
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 "config_components.h"
28
29 #include "parser.h"
30 #include "libavutil/intreadwrite.h"
31
32 typedef struct RV34ParseContext {
33 ParseContext pc;
34 int64_t key_dts;
35 int key_pts;
36 } RV34ParseContext;
37
38 static const int rv_to_av_frame_type[4] = {
39 AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B,
40 };
41
42 550 static int rv34_parse(AVCodecParserContext *s,
43 AVCodecContext *avctx,
44 const uint8_t **poutbuf, int *poutbuf_size,
45 const uint8_t *buf, int buf_size)
46 {
47 550 RV34ParseContext *pc = s->priv_data;
48 int type, pts, hdr;
49
50
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550 if (buf_size < 13 + *buf * 8) {
51 3 *poutbuf = buf;
52 3 *poutbuf_size = buf_size;
53 3 return buf_size;
54 }
55
56 547 hdr = AV_RB32(buf + 9 + *buf * 8);
57
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547 if (avctx->codec_id == AV_CODEC_ID_RV30) {
58 244 type = (hdr >> 27) & 3;
59 244 pts = (hdr >> 7) & 0x1FFF;
60 } else {
61 303 type = (hdr >> 29) & 3;
62 303 pts = (hdr >> 6) & 0x1FFF;
63 }
64
65
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547 if (type != 3 && s->pts != AV_NOPTS_VALUE) {
66 158 pc->key_dts = s->pts;
67 158 pc->key_pts = pts;
68 } else {
69
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389 if (type != 3)
70 2 s->pts = pc->key_dts + ((pts - pc->key_pts) & 0x1FFF);
71 else
72 387 s->pts = pc->key_dts - ((pc->key_pts - pts) & 0x1FFF);
73 }
74 547 s->pict_type = rv_to_av_frame_type[type];
75
76 547 *poutbuf = buf;
77 547 *poutbuf_size = buf_size;
78 547 return buf_size;
79 }
80
81 #if CONFIG_RV30_PARSER
82 const AVCodecParser ff_rv30_parser = {
83 .codec_ids = { AV_CODEC_ID_RV30 },
84 .priv_data_size = sizeof(RV34ParseContext),
85 .parser_parse = rv34_parse,
86 };
87 #endif
88
89 #if CONFIG_RV40_PARSER
90 const AVCodecParser ff_rv40_parser = {
91 .codec_ids = { AV_CODEC_ID_RV40 },
92 .priv_data_size = sizeof(RV34ParseContext),
93 .parser_parse = rv34_parse,
94 };
95 #endif
96