Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavformat / dtshddec.c
... / ...
CommitLineData
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 "avformat.h"
25
26#define AUPR_HDR 0x415550522D484452
27#define AUPRINFO 0x41555052494E464F
28#define BITSHVTB 0x4249545348565442
29#define BLACKOUT 0x424C41434B4F5554
30#define BRANCHPT 0x4252414E43485054
31#define BUILDVER 0x4255494C44564552
32#define CORESSMD 0x434F524553534D44
33#define DTSHDHDR 0x4454534844484452
34#define EXTSS_MD 0x45585453535f4d44
35#define FILEINFO 0x46494C45494E464F
36#define NAVI_TBL 0x4E4156492D54424C
37#define STRMDATA 0x5354524D44415441
38#define TIMECODE 0x54494D45434F4445
39
40typedef struct DTSHDDemuxContext {
41 uint64_t data_end;
42} DTSHDDemuxContext;
43
44static int dtshd_probe(AVProbeData *p)
45{
46 if (AV_RB64(p->buf) == DTSHDHDR)
47 return AVPROBE_SCORE_MAX;
48 return 0;
49}
50
51static int dtshd_read_header(AVFormatContext *s)
52{
53 DTSHDDemuxContext *dtshd = s->priv_data;
54 AVIOContext *pb = s->pb;
55 uint64_t chunk_type, chunk_size;
56 AVStream *st;
57 int ret;
58 char *value;
59
60 st = avformat_new_stream(s, NULL);
61 if (!st)
62 return AVERROR(ENOMEM);
63 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
64 st->codec->codec_id = AV_CODEC_ID_DTS;
65 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
66
67 while (!avio_feof(pb)) {
68 chunk_type = avio_rb64(pb);
69 chunk_size = avio_rb64(pb);
70
71 if (chunk_size < 4) {
72 av_log(s, AV_LOG_ERROR, "chunk size too small\n");
73 return AVERROR_INVALIDDATA;
74 }
75 if (chunk_size > ((uint64_t)1 << 61)) {
76 av_log(s, AV_LOG_ERROR, "chunk size too big\n");
77 return AVERROR_INVALIDDATA;
78 }
79
80 switch (chunk_type) {
81 case STRMDATA:
82 dtshd->data_end = chunk_size + avio_tell(pb);
83 if (dtshd->data_end <= chunk_size)
84 return AVERROR_INVALIDDATA;
85 return 0;
86 break;
87 case FILEINFO:
88 if (chunk_size > INT_MAX)
89 goto skip;
90 value = av_malloc(chunk_size);
91 if (!value)
92 goto skip;
93 avio_read(pb, value, chunk_size);
94 value[chunk_size - 1] = 0;
95 av_dict_set(&s->metadata, "fileinfo", value,
96 AV_DICT_DONT_STRDUP_VAL);
97 break;
98 default:
99skip:
100 ret = avio_skip(pb, chunk_size);
101 if (ret < 0)
102 return ret;
103 };
104 }
105
106 return AVERROR_EOF;
107}
108
109static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
110{
111 DTSHDDemuxContext *dtshd = s->priv_data;
112 int64_t size, left;
113 int ret;
114
115 left = dtshd->data_end - avio_tell(s->pb);
116 size = FFMIN(left, 1024);
117 if (size <= 0)
118 return AVERROR_EOF;
119
120 ret = av_get_packet(s->pb, pkt, size);
121 if (ret < 0)
122 return ret;
123
124 pkt->stream_index = 0;
125
126 return ret;
127}
128
129AVInputFormat ff_dtshd_demuxer = {
130 .name = "dtshd",
131 .long_name = NULL_IF_CONFIG_SMALL("raw DTS-HD"),
132 .priv_data_size = sizeof(DTSHDDemuxContext),
133 .read_probe = dtshd_probe,
134 .read_header = dtshd_read_header,
135 .read_packet = raw_read_packet,
136 .flags = AVFMT_GENERIC_INDEX,
137 .extensions = "dtshd",
138 .raw_codec_id = AV_CODEC_ID_DTS,
139};