| 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 "libavutil/mem.h" | ||
| 25 | #include "libavcodec/dca.h" | ||
| 26 | #include "avformat.h" | ||
| 27 | #include "demux.h" | ||
| 28 | #include "internal.h" | ||
| 29 | |||
| 30 | #define AUPR_HDR 0x415550522D484452 | ||
| 31 | #define AUPRINFO 0x41555052494E464F | ||
| 32 | #define BITSHVTB 0x4249545348565442 | ||
| 33 | #define BLACKOUT 0x424C41434B4F5554 | ||
| 34 | #define BRANCHPT 0x4252414E43485054 | ||
| 35 | #define BUILDVER 0x4255494C44564552 | ||
| 36 | #define CORESSMD 0x434F524553534D44 | ||
| 37 | #define DTSHDHDR 0x4454534844484452 | ||
| 38 | #define EXTSS_MD 0x45585453535f4d44 | ||
| 39 | #define FILEINFO 0x46494C45494E464F | ||
| 40 | #define NAVI_TBL 0x4E4156492D54424C | ||
| 41 | #define STRMDATA 0x5354524D44415441 | ||
| 42 | #define TIMECODE 0x54494D45434F4445 | ||
| 43 | |||
| 44 | typedef struct DTSHDDemuxContext { | ||
| 45 | uint64_t data_end; | ||
| 46 | } DTSHDDemuxContext; | ||
| 47 | |||
| 48 | 7125 | static int dtshd_probe(const AVProbeData *p) | |
| 49 | { | ||
| 50 |
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7125 | if (AV_RB64(p->buf) == DTSHDHDR) |
| 51 | 42 | return AVPROBE_SCORE_MAX; | |
| 52 | 7083 | return 0; | |
| 53 | } | ||
| 54 | |||
| 55 | 42 | static int dtshd_read_header(AVFormatContext *s) | |
| 56 | { | ||
| 57 | 42 | DTSHDDemuxContext *dtshd = s->priv_data; | |
| 58 | 42 | AVIOContext *pb = s->pb; | |
| 59 | uint64_t chunk_type, chunk_size; | ||
| 60 | int64_t duration, orig_nb_samples, data_start; | ||
| 61 | AVStream *st; | ||
| 62 | int ret; | ||
| 63 | char *value; | ||
| 64 | |||
| 65 | 42 | st = avformat_new_stream(s, NULL); | |
| 66 |
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42 | if (!st) |
| 67 | ✗ | return AVERROR(ENOMEM); | |
| 68 | 42 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 69 | 42 | st->codecpar->codec_id = AV_CODEC_ID_DTS; | |
| 70 | 42 | ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW; | |
| 71 | |||
| 72 | for (;;) { | ||
| 73 | 395 | chunk_type = avio_rb64(pb); | |
| 74 | 395 | chunk_size = avio_rb64(pb); | |
| 75 | |||
| 76 |
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395 | if (avio_feof(pb)) |
| 77 | 42 | break; | |
| 78 | |||
| 79 |
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353 | if (chunk_size < 4) { |
| 80 | ✗ | av_log(s, AV_LOG_ERROR, "chunk size too small\n"); | |
| 81 | ✗ | return AVERROR_INVALIDDATA; | |
| 82 | } | ||
| 83 |
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353 | if (chunk_size > ((uint64_t)1 << 61)) { |
| 84 | ✗ | av_log(s, AV_LOG_ERROR, "chunk size too big\n"); | |
| 85 | ✗ | return AVERROR_INVALIDDATA; | |
| 86 | } | ||
| 87 | |||
| 88 |
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353 | switch (chunk_type) { |
| 89 | 42 | case STRMDATA: | |
| 90 | 42 | data_start = avio_tell(pb); | |
| 91 | 42 | dtshd->data_end = data_start + chunk_size; | |
| 92 |
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42 | if (dtshd->data_end <= chunk_size) |
| 93 | ✗ | return AVERROR_INVALIDDATA; | |
| 94 |
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42 | if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) |
| 95 | ✗ | goto break_loop; | |
| 96 | 42 | goto skip; | |
| 97 | break; | ||
| 98 | 42 | case AUPR_HDR: | |
| 99 |
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42 | if (chunk_size < 21) |
| 100 | ✗ | return AVERROR_INVALIDDATA; | |
| 101 | 42 | avio_skip(pb, 3); | |
| 102 | 42 | st->codecpar->sample_rate = avio_rb24(pb); | |
| 103 |
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42 | if (!st->codecpar->sample_rate) |
| 104 | ✗ | return AVERROR_INVALIDDATA; | |
| 105 | 42 | duration = avio_rb32(pb); // num_frames | |
| 106 | 42 | duration *= avio_rb16(pb); // samples_per_frames | |
| 107 | 42 | st->duration = duration; | |
| 108 | 42 | orig_nb_samples = avio_rb32(pb); | |
| 109 | 42 | orig_nb_samples <<= 8; | |
| 110 | 42 | orig_nb_samples |= avio_r8(pb); | |
| 111 | 42 | st->codecpar->ch_layout.nb_channels = ff_dca_count_chs_for_mask(avio_rb16(pb)); | |
| 112 | 42 | st->codecpar->initial_padding = avio_rb16(pb); | |
| 113 | 42 | st->codecpar->trailing_padding = FFMAX(st->duration - orig_nb_samples - st->codecpar->initial_padding, 0); | |
| 114 | 42 | avio_skip(pb, chunk_size - 21); | |
| 115 | 42 | break; | |
| 116 | 42 | case FILEINFO: | |
| 117 |
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42 | if (chunk_size > INT_MAX) |
| 118 | ✗ | goto skip; | |
| 119 | 42 | value = av_malloc(chunk_size); | |
| 120 |
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42 | if (!value) |
| 121 | ✗ | goto skip; | |
| 122 | 42 | avio_read(pb, value, chunk_size); | |
| 123 | 42 | value[chunk_size - 1] = 0; | |
| 124 | 42 | av_dict_set(&s->metadata, "fileinfo", value, | |
| 125 | AV_DICT_DONT_STRDUP_VAL); | ||
| 126 | 42 | break; | |
| 127 | default: | ||
| 128 | 269 | skip: | |
| 129 | 269 | ret = avio_skip(pb, chunk_size); | |
| 130 |
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269 | if (ret < 0) |
| 131 | ✗ | return ret; | |
| 132 | }; | ||
| 133 | } | ||
| 134 | |||
| 135 |
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42 | if (!dtshd->data_end) |
| 136 | ✗ | return AVERROR_EOF; | |
| 137 | |||
| 138 | 42 | avio_seek(pb, data_start, SEEK_SET); | |
| 139 | |||
| 140 | 42 | break_loop: | |
| 141 |
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42 | if (st->codecpar->sample_rate) |
| 142 | 42 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 143 | |||
| 144 | 42 | return 0; | |
| 145 | } | ||
| 146 | |||
| 147 | 1408 | static int raw_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 148 | { | ||
| 149 | 1408 | DTSHDDemuxContext *dtshd = s->priv_data; | |
| 150 | int64_t size, left; | ||
| 151 | int ret; | ||
| 152 | |||
| 153 | 1408 | left = dtshd->data_end - avio_tell(s->pb); | |
| 154 | 1408 | size = FFMIN(left, 1024); | |
| 155 |
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1408 | if (size <= 0) |
| 156 | 126 | return AVERROR_EOF; | |
| 157 | |||
| 158 | 1282 | ret = av_get_packet(s->pb, pkt, size); | |
| 159 |
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1282 | if (ret < 0) |
| 160 | ✗ | return ret; | |
| 161 | |||
| 162 | 1282 | pkt->stream_index = 0; | |
| 163 | |||
| 164 | 1282 | return ret; | |
| 165 | } | ||
| 166 | |||
| 167 | const FFInputFormat ff_dtshd_demuxer = { | ||
| 168 | .p.name = "dtshd", | ||
| 169 | .p.long_name = NULL_IF_CONFIG_SMALL("raw DTS-HD"), | ||
| 170 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 171 | .p.extensions = "dtshd", | ||
| 172 | .priv_data_size = sizeof(DTSHDDemuxContext), | ||
| 173 | .read_probe = dtshd_probe, | ||
| 174 | .read_header = dtshd_read_header, | ||
| 175 | .read_packet = raw_read_packet, | ||
| 176 | .raw_codec_id = AV_CODEC_ID_DTS, | ||
| 177 | }; | ||
| 178 |