3 * Copyright (c) 2012 Paul B Mahol
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/dict.h"
24 #include "libavcodec/dca.h"
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
42 typedef struct DTSHDDemuxContext {
47 static int dtshd_probe(AVProbeData *p)
49 if (AV_RB64(p->buf) == DTSHDHDR)
50 return AVPROBE_SCORE_MAX;
54 static int dtshd_read_header(AVFormatContext *s)
56 DTSHDDemuxContext *dtshd = s->priv_data;
57 AVIOContext *pb = s->pb;
58 uint64_t chunk_type, chunk_size;
64 st = avformat_new_stream(s, NULL);
66 return AVERROR(ENOMEM);
67 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
68 st->codecpar->codec_id = AV_CODEC_ID_DTS;
69 st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
72 chunk_type = avio_rb64(pb);
73 chunk_size = avio_rb64(pb);
79 av_log(s, AV_LOG_ERROR, "chunk size too small\n");
80 return AVERROR_INVALIDDATA;
82 if (chunk_size > ((uint64_t)1 << 61)) {
83 av_log(s, AV_LOG_ERROR, "chunk size too big\n");
84 return AVERROR_INVALIDDATA;
89 dtshd->data_start = avio_tell(pb);
90 dtshd->data_end = dtshd->data_start + chunk_size;
91 if (dtshd->data_end <= chunk_size)
92 return AVERROR_INVALIDDATA;
99 return AVERROR_INVALIDDATA;
101 st->codecpar->sample_rate = avio_rb24(pb);
102 if (!st->codecpar->sample_rate)
103 return AVERROR_INVALIDDATA;
104 duration = avio_rb32(pb); // num_frames
105 duration *= avio_rb16(pb); // samples_per_frames
106 st->duration = duration;
108 st->codecpar->channels = ff_dca_count_chs_for_mask(avio_rb16(pb));
109 st->codecpar->initial_padding = avio_rb16(pb);
110 avio_skip(pb, chunk_size - 21);
113 if (chunk_size > INT_MAX)
115 value = av_malloc(chunk_size);
118 avio_read(pb, value, chunk_size);
119 value[chunk_size - 1] = 0;
120 av_dict_set(&s->metadata, "fileinfo", value,
121 AV_DICT_DONT_STRDUP_VAL);
125 ret = avio_skip(pb, chunk_size);
131 if (!dtshd->data_end)
134 avio_seek(pb, dtshd->data_start, SEEK_SET);
137 if (st->codecpar->sample_rate)
138 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
143 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
145 DTSHDDemuxContext *dtshd = s->priv_data;
149 left = dtshd->data_end - avio_tell(s->pb);
150 size = FFMIN(left, 1024);
154 ret = av_get_packet(s->pb, pkt, size);
158 pkt->stream_index = 0;
163 AVInputFormat ff_dtshd_demuxer = {
165 .long_name = NULL_IF_CONFIG_SMALL("raw DTS-HD"),
166 .priv_data_size = sizeof(DTSHDDemuxContext),
167 .read_probe = dtshd_probe,
168 .read_header = dtshd_read_header,
169 .read_packet = raw_read_packet,
170 .flags = AVFMT_GENERIC_INDEX,
171 .extensions = "dtshd",
172 .raw_codec_id = AV_CODEC_ID_DTS,