FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/dtshddec.c
Date: 2022-12-05 20:26:17
Exec Total Coverage
Lines: 65 79 82.3%
Functions: 3 3 100.0%
Branches: 23 36 63.9%

Line Branch Exec Source
1 /*
2 * Raw DTS-HD demuxer
3 * Copyright (c) 2012 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 "libavutil/dict.h"
24 #include "libavcodec/dca.h"
25 #include "avformat.h"
26 #include "internal.h"
27
28 #define AUPR_HDR 0x415550522D484452
29 #define AUPRINFO 0x41555052494E464F
30 #define BITSHVTB 0x4249545348565442
31 #define BLACKOUT 0x424C41434B4F5554
32 #define BRANCHPT 0x4252414E43485054
33 #define BUILDVER 0x4255494C44564552
34 #define CORESSMD 0x434F524553534D44
35 #define DTSHDHDR 0x4454534844484452
36 #define EXTSS_MD 0x45585453535f4d44
37 #define FILEINFO 0x46494C45494E464F
38 #define NAVI_TBL 0x4E4156492D54424C
39 #define STRMDATA 0x5354524D44415441
40 #define TIMECODE 0x54494D45434F4445
41
42 typedef struct DTSHDDemuxContext {
43 uint64_t data_end;
44 } DTSHDDemuxContext;
45
46 6782 static int dtshd_probe(const AVProbeData *p)
47 {
48
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6782 if (AV_RB64(p->buf) == DTSHDHDR)
49 42 return AVPROBE_SCORE_MAX;
50 6740 return 0;
51 }
52
53 42 static int dtshd_read_header(AVFormatContext *s)
54 {
55 42 DTSHDDemuxContext *dtshd = s->priv_data;
56 42 AVIOContext *pb = s->pb;
57 uint64_t chunk_type, chunk_size;
58 int64_t duration, data_start;
59 AVStream *st;
60 int ret;
61 char *value;
62
63 42 st = avformat_new_stream(s, NULL);
64
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42 if (!st)
65 return AVERROR(ENOMEM);
66 42 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
67 42 st->codecpar->codec_id = AV_CODEC_ID_DTS;
68 42 ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
69
70 for (;;) {
71 395 chunk_type = avio_rb64(pb);
72 395 chunk_size = avio_rb64(pb);
73
74
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395 if (avio_feof(pb))
75 42 break;
76
77
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353 if (chunk_size < 4) {
78 av_log(s, AV_LOG_ERROR, "chunk size too small\n");
79 return AVERROR_INVALIDDATA;
80 }
81
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353 if (chunk_size > ((uint64_t)1 << 61)) {
82 av_log(s, AV_LOG_ERROR, "chunk size too big\n");
83 return AVERROR_INVALIDDATA;
84 }
85
86
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353 switch (chunk_type) {
87 42 case STRMDATA:
88 42 data_start = avio_tell(pb);
89 42 dtshd->data_end = data_start + chunk_size;
90
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42 if (dtshd->data_end <= chunk_size)
91 return AVERROR_INVALIDDATA;
92
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42 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
93 goto break_loop;
94 42 goto skip;
95 break;
96 42 case AUPR_HDR:
97
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42 if (chunk_size < 21)
98 return AVERROR_INVALIDDATA;
99 42 avio_skip(pb, 3);
100 42 st->codecpar->sample_rate = avio_rb24(pb);
101
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42 if (!st->codecpar->sample_rate)
102 return AVERROR_INVALIDDATA;
103 42 duration = avio_rb32(pb); // num_frames
104 42 duration *= avio_rb16(pb); // samples_per_frames
105 42 st->duration = duration;
106 42 avio_skip(pb, 5);
107 42 st->codecpar->ch_layout.nb_channels = ff_dca_count_chs_for_mask(avio_rb16(pb));
108 42 st->codecpar->initial_padding = avio_rb16(pb);
109 42 avio_skip(pb, chunk_size - 21);
110 42 break;
111 42 case FILEINFO:
112
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42 if (chunk_size > INT_MAX)
113 goto skip;
114 42 value = av_malloc(chunk_size);
115
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42 if (!value)
116 goto skip;
117 42 avio_read(pb, value, chunk_size);
118 42 value[chunk_size - 1] = 0;
119 42 av_dict_set(&s->metadata, "fileinfo", value,
120 AV_DICT_DONT_STRDUP_VAL);
121 42 break;
122 default:
123 269 skip:
124 269 ret = avio_skip(pb, chunk_size);
125
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269 if (ret < 0)
126 return ret;
127 };
128 }
129
130
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42 if (!dtshd->data_end)
131 return AVERROR_EOF;
132
133 42 avio_seek(pb, data_start, SEEK_SET);
134
135 42 break_loop:
136
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42 if (st->codecpar->sample_rate)
137 42 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
138
139 42 return 0;
140 }
141
142 1408 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
143 {
144 1408 DTSHDDemuxContext *dtshd = s->priv_data;
145 int64_t size, left;
146 int ret;
147
148 1408 left = dtshd->data_end - avio_tell(s->pb);
149 1408 size = FFMIN(left, 1024);
150
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1408 if (size <= 0)
151 126 return AVERROR_EOF;
152
153 1282 ret = av_get_packet(s->pb, pkt, size);
154
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1282 if (ret < 0)
155 return ret;
156
157 1282 pkt->stream_index = 0;
158
159 1282 return ret;
160 }
161
162 const AVInputFormat ff_dtshd_demuxer = {
163 .name = "dtshd",
164 .long_name = NULL_IF_CONFIG_SMALL("raw DTS-HD"),
165 .priv_data_size = sizeof(DTSHDDemuxContext),
166 .read_probe = dtshd_probe,
167 .read_header = dtshd_read_header,
168 .read_packet = raw_read_packet,
169 .flags = AVFMT_GENERIC_INDEX,
170 .extensions = "dtshd",
171 .raw_codec_id = AV_CODEC_ID_DTS,
172 };
173