blob: 1bd403c8435626aa0849a6a9744f451a207959c7
| 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 | static int dtshd_probe(AVProbeData *p) |
| 47 | { |
| 48 | if (AV_RB64(p->buf) == DTSHDHDR) |
| 49 | return AVPROBE_SCORE_MAX; |
| 50 | return 0; |
| 51 | } |
| 52 | |
| 53 | static int dtshd_read_header(AVFormatContext *s) |
| 54 | { |
| 55 | DTSHDDemuxContext *dtshd = s->priv_data; |
| 56 | 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 | st = avformat_new_stream(s, NULL); |
| 64 | if (!st) |
| 65 | return AVERROR(ENOMEM); |
| 66 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| 67 | st->codecpar->codec_id = AV_CODEC_ID_DTS; |
| 68 | st->need_parsing = AVSTREAM_PARSE_FULL_RAW; |
| 69 | |
| 70 | for (;;) { |
| 71 | chunk_type = avio_rb64(pb); |
| 72 | chunk_size = avio_rb64(pb); |
| 73 | |
| 74 | if (avio_feof(pb)) |
| 75 | break; |
| 76 | |
| 77 | if (chunk_size < 4) { |
| 78 | av_log(s, AV_LOG_ERROR, "chunk size too small\n"); |
| 79 | return AVERROR_INVALIDDATA; |
| 80 | } |
| 81 | 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 | switch (chunk_type) { |
| 87 | case STRMDATA: |
| 88 | data_start = avio_tell(pb); |
| 89 | dtshd->data_end = data_start + chunk_size; |
| 90 | if (dtshd->data_end <= chunk_size) |
| 91 | return AVERROR_INVALIDDATA; |
| 92 | if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) |
| 93 | goto break_loop; |
| 94 | goto skip; |
| 95 | break; |
| 96 | case AUPR_HDR: |
| 97 | if (chunk_size < 21) |
| 98 | return AVERROR_INVALIDDATA; |
| 99 | avio_skip(pb, 3); |
| 100 | st->codecpar->sample_rate = avio_rb24(pb); |
| 101 | if (!st->codecpar->sample_rate) |
| 102 | return AVERROR_INVALIDDATA; |
| 103 | duration = avio_rb32(pb); // num_frames |
| 104 | duration *= avio_rb16(pb); // samples_per_frames |
| 105 | st->duration = duration; |
| 106 | avio_skip(pb, 5); |
| 107 | st->codecpar->channels = ff_dca_count_chs_for_mask(avio_rb16(pb)); |
| 108 | st->codecpar->initial_padding = avio_rb16(pb); |
| 109 | avio_skip(pb, chunk_size - 21); |
| 110 | break; |
| 111 | case FILEINFO: |
| 112 | if (chunk_size > INT_MAX) |
| 113 | goto skip; |
| 114 | value = av_malloc(chunk_size); |
| 115 | if (!value) |
| 116 | goto skip; |
| 117 | avio_read(pb, value, chunk_size); |
| 118 | value[chunk_size - 1] = 0; |
| 119 | av_dict_set(&s->metadata, "fileinfo", value, |
| 120 | AV_DICT_DONT_STRDUP_VAL); |
| 121 | break; |
| 122 | default: |
| 123 | skip: |
| 124 | ret = avio_skip(pb, chunk_size); |
| 125 | if (ret < 0) |
| 126 | return ret; |
| 127 | }; |
| 128 | } |
| 129 | |
| 130 | if (!dtshd->data_end) |
| 131 | return AVERROR_EOF; |
| 132 | |
| 133 | avio_seek(pb, data_start, SEEK_SET); |
| 134 | |
| 135 | break_loop: |
| 136 | if (st->codecpar->sample_rate) |
| 137 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
| 138 | |
| 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | static int raw_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 143 | { |
| 144 | DTSHDDemuxContext *dtshd = s->priv_data; |
| 145 | int64_t size, left; |
| 146 | int ret; |
| 147 | |
| 148 | left = dtshd->data_end - avio_tell(s->pb); |
| 149 | size = FFMIN(left, 1024); |
| 150 | if (size <= 0) |
| 151 | return AVERROR_EOF; |
| 152 | |
| 153 | ret = av_get_packet(s->pb, pkt, size); |
| 154 | if (ret < 0) |
| 155 | return ret; |
| 156 | |
| 157 | pkt->stream_index = 0; |
| 158 | |
| 159 | return ret; |
| 160 | } |
| 161 | |
| 162 | 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 |