FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/vpk.c
Date: 2026-09-17 21:53:11
Exec Total Coverage
Lines: 48 73 65.8%
Functions: 3 4 75.0%
Branches: 15 30 50.0%
Line Branch Exec Source
1 /*
2 * VPK demuxer
3 * Copyright (c) 2015 Paul B Mahol
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/intreadwrite.h"
23 #include "avformat.h"
24 #include "avio_internal.h"
25 #include "demux.h"
26 #include "internal.h"
27
28 typedef struct VPKDemuxContext {
29 unsigned data_start;
30 unsigned block_count;
31 unsigned current_block;
32 unsigned last_block_size;
33 } VPKDemuxContext;
34
35 8043 static int vpk_probe(const AVProbeData *p)
36 {
37
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 8043 if (AV_RL32(p->buf) != MKBETAG('V','P','K',' '))
38 8042 return 0;
39
40 1 return AVPROBE_SCORE_MAX / 3 * 2;
41 }
42
43 1 static int vpk_read_header(AVFormatContext *s)
44 {
45 1 VPKDemuxContext *vpk = s->priv_data;
46 unsigned offset;
47 unsigned samples_per_block;
48 AVStream *st;
49
50 1 vpk->current_block = 0;
51 1 st = avformat_new_stream(s, NULL);
52
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 1 if (!st)
53 ✗ return AVERROR(ENOMEM);
54
55 1 avio_skip(s->pb, 4);
56 1 st->duration = avio_rl32(s->pb) * 28 / 16;
57 1 offset = avio_rl32(s->pb);
58 1 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
59 1 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX;
60 1 st->codecpar->block_align = avio_rl32(s->pb);
61 1 st->codecpar->sample_rate = avio_rl32(s->pb);
62
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 1 if (st->codecpar->sample_rate <= 0 || st->codecpar->block_align <= 0)
63 ✗ return AVERROR_INVALIDDATA;
64 1 st->codecpar->ch_layout.nb_channels = avio_rl32(s->pb);
65
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 1 if (st->codecpar->ch_layout.nb_channels <= 0)
66 ✗ return AVERROR_INVALIDDATA;
67 1 samples_per_block = ((st->codecpar->block_align / st->codecpar->ch_layout.nb_channels) * 28LL) / 16;
68
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 1 if (samples_per_block <= 0)
69 ✗ return AVERROR_INVALIDDATA;
70 1 vpk->block_count = (st->duration + (samples_per_block - 1)) / samples_per_block;
71 1 vpk->last_block_size = (st->duration % samples_per_block) * 16 * st->codecpar->ch_layout.nb_channels / 28;
72
73
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 1 if (offset < avio_tell(s->pb))
74 ✗ return AVERROR_INVALIDDATA;
75 1 avio_skip(s->pb, offset - avio_tell(s->pb));
76 1 vpk->data_start = offset;
77 1 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
78
79 1 return 0;
80 }
81
82 2 static int vpk_read_packet(AVFormatContext *s, AVPacket *pkt)
83 {
84 2 AVCodecParameters *par = s->streams[0]->codecpar;
85 2 VPKDemuxContext *vpk = s->priv_data;
86 int ret, i;
87
88 2 vpk->current_block++;
89
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 2 if (vpk->current_block == vpk->block_count) {
90 unsigned size, skip;
91 uint64_t pos;
92
93
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 1 if (par->ch_layout.nb_channels <= 0)
94 ✗ return AVERROR_INVALIDDATA;
95 1 size = vpk->last_block_size / par->ch_layout.nb_channels;
96 1 skip = (par->block_align - vpk->last_block_size) / par->ch_layout.nb_channels;
97 1 pos = avio_tell(s->pb);
98
99 1 ret = av_new_packet(pkt, vpk->last_block_size);
100
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 1 if (ret < 0)
101 ✗ return ret;
102
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 1 for (i = 0; i < par->ch_layout.nb_channels; i++) {
103 1 ret = ffio_read_size(s->pb, pkt->data + i * size, size);
104 1 avio_skip(s->pb, skip);
105
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 1 if (ret < 0) {
106 1 return ret;
107 }
108 }
109 ✗ pkt->pos = pos;
110 ✗ pkt->stream_index = 0;
111
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 1 } else if (vpk->current_block < vpk->block_count) {
112 1 ret = av_get_packet(s->pb, pkt, par->block_align);
113 1 pkt->stream_index = 0;
114 } else {
115 ✗ return AVERROR_EOF;
116 }
117
118 1 return ret;
119 }
120
121 ✗ static int vpk_read_seek(AVFormatContext *s, int stream_index,
122 int64_t timestamp, int flags)
123 {
124 ✗ AVStream *st = s->streams[stream_index];
125 ✗ AVCodecParameters *par = st->codecpar;
126 ✗ VPKDemuxContext *vpk = s->priv_data;
127 int samples_per_block;
128 ✗ int64_t ret = 0;
129
130 ✗ samples_per_block = av_get_audio_frame_duration2(par, par->block_align);
131 ✗ if (samples_per_block > 0)
132 ✗ timestamp /= samples_per_block;
133 else
134 ✗ return -1;
135 ✗ ret = avio_seek(s->pb, vpk->data_start + timestamp * par->block_align, SEEK_SET);
136 ✗ if (ret < 0)
137 ✗ return ret;
138
139 ✗ vpk->current_block = timestamp;
140 ✗ avpriv_update_cur_dts(s, st, timestamp * samples_per_block);
141 ✗ return 0;
142 }
143
144 const FFInputFormat ff_vpk_demuxer = {
145 .p.name = "vpk",
146 .p.long_name = NULL_IF_CONFIG_SMALL("Sony PS2 VPK"),
147 .p.extensions = "vpk",
148 .priv_data_size = sizeof(VPKDemuxContext),
149 .read_probe = vpk_probe,
150 .read_header = vpk_read_header,
151 .read_packet = vpk_read_packet,
152 .read_seek = vpk_read_seek,
153 };
154