diff options
Diffstat (limited to 'libavformat/dtshddec.c')
| -rw-r--r-- | libavformat/dtshddec.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/libavformat/dtshddec.c b/libavformat/dtshddec.c new file mode 100644 index 0000000000..55c4ca607e --- /dev/null +++ b/libavformat/dtshddec.c @@ -0,0 +1,139 @@ +/* + * Raw DTS-HD demuxer + * Copyright (c) 2012 Paul B Mahol + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/intreadwrite.h" +#include "libavutil/dict.h" +#include "avformat.h" + +#define AUPR_HDR 0x415550522D484452 +#define AUPRINFO 0x41555052494E464F +#define BITSHVTB 0x4249545348565442 +#define BLACKOUT 0x424C41434B4F5554 +#define BRANCHPT 0x4252414E43485054 +#define BUILDVER 0x4255494C44564552 +#define CORESSMD 0x434F524553534D44 +#define DTSHDHDR 0x4454534844484452 +#define EXTSS_MD 0x45585453535f4d44 +#define FILEINFO 0x46494C45494E464F +#define NAVI_TBL 0x4E4156492D54424C +#define STRMDATA 0x5354524D44415441 +#define TIMECODE 0x54494D45434F4445 + +typedef struct DTSHDDemuxContext { + uint64_t data_end; +} DTSHDDemuxContext; + +static int dtshd_probe(AVProbeData *p) +{ + if (AV_RB64(p->buf) == DTSHDHDR) + return AVPROBE_SCORE_MAX; + return 0; +} + +static int dtshd_read_header(AVFormatContext *s) +{ + DTSHDDemuxContext *dtshd = s->priv_data; + AVIOContext *pb = s->pb; + uint64_t chunk_type, chunk_size; + AVStream *st; + int ret; + char *value; + + st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + st->codec->codec_type = AVMEDIA_TYPE_AUDIO; + st->codec->codec_id = AV_CODEC_ID_DTS; + st->need_parsing = AVSTREAM_PARSE_FULL_RAW; + + while (!url_feof(pb)) { + chunk_type = avio_rb64(pb); + chunk_size = avio_rb64(pb); + + if (chunk_size < 4) { + av_log(s, AV_LOG_ERROR, "chunk size too small\n"); + return AVERROR_INVALIDDATA; + } + if (chunk_size > ((uint64_t)1 << 61)) { + av_log(s, AV_LOG_ERROR, "chunk size too big\n"); + return AVERROR_INVALIDDATA; + } + + switch (chunk_type) { + case STRMDATA: + dtshd->data_end = chunk_size + avio_tell(pb); + if (dtshd->data_end <= chunk_size) + return AVERROR_INVALIDDATA; + return 0; + break; + case FILEINFO: + if (chunk_size > INT_MAX) + goto skip; + value = av_malloc(chunk_size); + if (!value) + goto skip; + avio_read(pb, value, chunk_size); + value[chunk_size - 1] = 0; + av_dict_set(&s->metadata, "fileinfo", value, + AV_DICT_DONT_STRDUP_VAL); + break; + default: +skip: + ret = avio_skip(pb, chunk_size); + if (ret < 0) + return ret; + }; + } + + return AVERROR_EOF; +} + +static int raw_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + DTSHDDemuxContext *dtshd = s->priv_data; + int64_t size, left; + int ret; + + left = dtshd->data_end - avio_tell(s->pb); + size = FFMIN(left, 1024); + if (size <= 0) + return AVERROR_EOF; + + ret = av_get_packet(s->pb, pkt, size); + if (ret < 0) + return ret; + + pkt->stream_index = 0; + + return ret; +} + +AVInputFormat ff_dtshd_demuxer = { + .name = "dtshd", + .long_name = NULL_IF_CONFIG_SMALL("raw DTS-HD"), + .priv_data_size = sizeof(DTSHDDemuxContext), + .read_probe = dtshd_probe, + .read_header = dtshd_read_header, + .read_packet = raw_read_packet, + .flags = AVFMT_GENERIC_INDEX, + .extensions = "dtshd", + .raw_codec_id = AV_CODEC_ID_DTS, +}; |