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| author | James Almer <jamrial@gmail.com> | 2016-05-16 15:45:22 -0300 |
|---|---|---|
| committer | James Almer <jamrial@gmail.com> | 2016-05-16 19:29:59 -0300 |
| commit | 60c2e38dcbe4656bccf08bc70822e06007e555c2 (patch) | |
| tree | e0487c385037a5c268521eb107e807023142ac40 /libavformat/dtshddec.c | |
| parent | ab3c04c4580563b12e3433ac5920850cdd29ddd1 (diff) | |
| download | ffmpeg-60c2e38dcbe4656bccf08bc70822e06007e555c2.tar.gz | |
avformat/dtshddec: implement AUPR_HDR chunk parsing
Use it to get stream duration, sample rate, channel count and initial padding
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
Diffstat (limited to 'libavformat/dtshddec.c')
| -rw-r--r-- | libavformat/dtshddec.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/libavformat/dtshddec.c b/libavformat/dtshddec.c index 1fba95740f..c4ca3b4bac 100644 --- a/libavformat/dtshddec.c +++ b/libavformat/dtshddec.c @@ -21,7 +21,9 @@ #include "libavutil/intreadwrite.h" #include "libavutil/dict.h" +#include "libavcodec/dca.h" #include "avformat.h" +#include "internal.h" #define AUPR_HDR 0x415550522D484452 #define AUPRINFO 0x41555052494E464F @@ -54,6 +56,7 @@ static int dtshd_read_header(AVFormatContext *s) DTSHDDemuxContext *dtshd = s->priv_data; AVIOContext *pb = s->pb; uint64_t chunk_type, chunk_size; + int64_t duration; AVStream *st; int ret; char *value; @@ -88,9 +91,24 @@ static int dtshd_read_header(AVFormatContext *s) if (dtshd->data_end <= chunk_size) return AVERROR_INVALIDDATA; if (!pb->seekable) - return 0; + goto break_loop; goto skip; break; + case AUPR_HDR: + if (chunk_size < 21) + return AVERROR_INVALIDDATA; + avio_skip(pb, 3); + st->codecpar->sample_rate = avio_rb24(pb); + if (!st->codecpar->sample_rate) + return AVERROR_INVALIDDATA; + duration = avio_rb32(pb); // num_frames + duration *= avio_rb16(pb); // samples_per_frames + st->duration = duration; + avio_skip(pb, 5); + st->codecpar->channels = ff_dca_count_chs_for_mask(avio_rb16(pb)); + st->codecpar->initial_padding = avio_rb16(pb); + avio_skip(pb, chunk_size - 21); + break; case FILEINFO: if (chunk_size > INT_MAX) goto skip; @@ -115,6 +133,10 @@ skip: avio_seek(pb, dtshd->data_start, SEEK_SET); +break_loop: + if (st->codecpar->sample_rate) + avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); + return 0; } |